/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-main: #0b0f19;
    --bg-card: #151b2c;
    --bg-nav: #101626;
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --primary-color: #6366f1; /* Indigo */
    --primary-hover: #4f46e5;
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    
    /* Exam Colors */
    --color-oge: #10b981; /* Emerald */
    --color-ege: #f59e0b; /* Amber */
    --color-vpr: #06b6d4; /* Cyan */
    
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-premium: 0 10px 30px -10px rgba(0, 0, 0, 0.7);
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-smooth);
}

a:hover {
    color: var(--text-primary);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navbar */
.header {
    background-color: var(--bg-nav);
    border-bottom: 1px solid var(--border-color);
    position: relative;
    z-index: 100;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 20px;
    color: var(--text-primary);
}

.logo-icon {
    background: var(--primary-gradient);
    color: white;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-size: 16px;
    box-shadow: 0 4px 10px rgba(99, 102, 241, 0.3);
}

.logo-text .highlight {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 25px;
    align-items: center;
}

.nav-menu a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 15px;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--text-primary);
}

/* Dropdown Menu */
.dropdown {
    position: relative;
    cursor: pointer;
}

.dropdown-trigger {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition-smooth);
}

.dropdown-trigger:hover {
    color: var(--text-primary);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    list-style: none;
    min-width: 180px;
    display: none;
    flex-direction: column;
    padding: 10px 0;
    box-shadow: var(--shadow-premium);
    margin-top: 10px;
}

.dropdown-menu li a {
    padding: 8px 20px;
    display: block;
    width: 100%;
}

.dropdown-menu li a:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.dropdown:hover .dropdown-menu {
    display: flex;
}

/* Checkbox Hamburger Menu */
.nav-toggle {
    display: none;
}

.nav-toggle-label {
    display: none;
    cursor: pointer;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
    display: block;
    background: var(--text-primary);
    height: 2px;
    width: 25px;
    position: relative;
    transition: var(--transition-smooth);
}

.nav-toggle-label span::before,
.nav-toggle-label span::after {
    content: '';
    position: absolute;
}

.nav-toggle-label span::before {
    bottom: 8px;
}

.nav-toggle-label span::after {
    top: 8px;
}

/* Main Layout */
.main-content {
    padding: 40px 0;
    min-height: 70vh;
}

/* Breadcrumbs */
.breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 30px;
    font-size: 14px;
    color: var(--text-secondary);
}

.breadcrumbs a {
    color: var(--text-secondary);
}

.breadcrumbs a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.breadcrumbs .sep {
    color: var(--text-muted);
}

.breadcrumbs .current {
    color: var(--text-primary);
    font-weight: 500;
}

/* Cards & Elements */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 30px;
    box-shadow: var(--shadow-premium);
    transition: var(--transition-smooth);
}

.card:hover {
    border-color: rgba(255, 255, 255, 0.15);
}

/* Hero Section */
.hero-section {
    text-align: center;
    padding: 60px 0;
    margin-bottom: 40px;
    background: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.15) 0%, rgba(0, 0, 0, 0) 60%);
}

.hero-section h1 {
    font-size: 48px;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #ffffff 0%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* SEO Cards */
.seo-card, .main-seo-card {
    margin-bottom: 40px;
    border-left: 4px solid var(--primary-color);
}

.seo-card h2, .main-seo-card h2 {
    font-size: 22px;
    margin-bottom: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.seo-text-block {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.8;
    text-align: justify;
}

/* Category header */
.category-header {
    text-align: center;
    margin-bottom: 40px;
}

.category-header h1 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 10px;
}

.category-subtitle {
    color: var(--text-secondary);
    font-size: 16px;
}

/* Shortcuts */
.nav-shortcuts {
    margin-bottom: 50px;
}

.nav-shortcuts h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 25px;
    text-align: center;
}

.shortcuts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.shortcut-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
}

.shortcut-card h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag {
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    transition: var(--transition-smooth);
}

.tag-oge:hover {
    background-color: rgba(16, 185, 129, 0.15);
    color: var(--color-oge);
}

.tag-ege:hover {
    background-color: rgba(245, 158, 11, 0.15);
    color: var(--color-ege);
}

.tag-vpr:hover {
    background-color: rgba(6, 182, 212, 0.15);
    color: var(--color-vpr);
}

.tag-subj:hover, .tag-class:hover {
    background-color: rgba(99, 102, 241, 0.15);
    color: #a5b4fc;
}

/* Variants Listing */
.variants-section h2 {
    font-size: 24px;
    margin-bottom: 25px;
    font-weight: 700;
}

.variants-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 25px;
}

.variant-card {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.card-badges {
    display: flex;
    gap: 8px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.badge {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 20px;
}

.badge-oge { background: rgba(16, 185, 129, 0.15); color: var(--color-oge); }
.badge-ege { background: rgba(245, 158, 11, 0.15); color: var(--color-ege); }
.badge-vpr { background: rgba(6, 182, 212, 0.15); color: var(--color-vpr); }
.badge-subject { background: rgba(99, 102, 241, 0.15); color: #818cf8; }
.badge-class { background: rgba(255, 255, 255, 0.05); color: var(--text-secondary); }

.variant-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.variant-meta {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 15px;
}

.variant-brief {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 20px;
    flex-grow: 1;
}

.card-actions {
    display: flex;
    gap: 12px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    border: none;
    transition: var(--transition-smooth);
}

.btn-large {
    padding: 14px 28px;
    font-size: 16px;
    border-radius: 10px;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
    color: white;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Variant Detail Page */
.variant-page {
    border-top: 4px solid var(--primary-color);
}

.variant-header h1 {
    font-size: 32px;
    font-weight: 800;
    margin: 15px 0 10px 0;
    line-height: 1.3;
}

.variant-description {
    margin-top: 30px;
}

.variant-description h2 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.lead-desc {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Action Bar */
.action-bar {
    margin: 35px 0;
    padding: 25px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.download-section {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.share-section {
    display: flex;
    align-items: center;
    gap: 15px;
}

.share-section span {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
}

.share-buttons {
    display: flex;
    gap: 10px;
}

.share-btn {
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    display: inline-flex;
    align-items: center;
    transition: var(--transition-smooth);
}

.share-wa {
    background-color: rgba(37, 211, 102, 0.15);
    color: #25d366;
}

.share-wa:hover {
    background-color: #25d366;
    color: white;
}

.share-vk {
    background-color: rgba(76, 117, 163, 0.15);
    color: #4c75a3;
}

.share-vk:hover {
    background-color: #4c75a3;
    color: white;
}

.share-tg {
    background-color: rgba(0, 136, 204, 0.15);
    color: #0088cc;
}

.share-tg:hover {
    background-color: #0088cc;
    color: white;
}

.share-copy {
    background-color: rgba(99, 102, 241, 0.15);
    color: var(--primary-color);
}

.share-copy:hover {
    background-color: var(--primary-color);
    color: white;
}

/* PDF Viewer */
.pdf-viewer {
    margin: 40px 0;
}

.pdf-viewer h2 {
    font-size: 20px;
    margin-bottom: 15px;
    font-weight: 700;
}

.mobile-notice {
    display: none;
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--color-ege);
    padding: 12px 15px;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 15px;
    border-left: 3px solid var(--color-ege);
}

.iframe-container {
    background: #0f172a;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

/* Extracted SEO Text Box */
.extracted-text-box {
    margin-top: 50px;
    background: #0c101b;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
}

.extracted-text-box h3 {
    font-size: 15px;
    margin-bottom: 15px;
    color: var(--text-muted);
    font-weight: 600;
}

.extracted-text-content {
    height: 150px;
    overflow-y: scroll;
    font-size: 11px;
    line-height: 1.6;
    color: #4b5563;
    font-family: monospace;
    white-space: pre-wrap;
    padding-right: 15px;
    text-align: justify;
}

.extracted-text-content::-webkit-scrollbar {
    width: 6px;
}

.extracted-text-content::-webkit-scrollbar-track {
    background: #0f172a;
    border-radius: 3px;
}

.extracted-text-content::-webkit-scrollbar-thumb {
    background: #374151;
    border-radius: 3px;
}

.extracted-text-content::-webkit-scrollbar-thumb:hover {
    background: #4b5563;
}

/* Floating Scroll Buttons */
.scroll-buttons {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 1000;
}

.scroll-buttons button {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    font-size: 20px;
    font-weight: 800;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.35);
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
}

.scroll-buttons button:hover {
    transform: scale(1.1) translateY(-2px);
    box-shadow: 0 6px 25px rgba(99, 102, 241, 0.5);
}

/* Toast Copy Link Notification */
.toast {
    visibility: hidden;
    min-width: 250px;
    background-color: #10b981;
    color: #fff;
    text-align: center;
    border-radius: 8px;
    padding: 16px;
    position: fixed;
    z-index: 1001;
    left: 50%;
    bottom: 30px;
    transform: translateX(-50%);
    font-size: 15px;
    font-weight: 600;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.toast.show {
    visibility: visible;
    -webkit-animation: fadein 0.5s, fadeout 0.5s 2.5s;
    animation: fadein 0.5s, fadeout 0.5s 2.5s;
}

@-webkit-keyframes fadein {
    from { bottom: 0; opacity: 0; } 
    to { bottom: 30px; opacity: 1; }
}

@keyframes fadein {
    from { bottom: 0; opacity: 0; }
    to { bottom: 30px; opacity: 1; }
}

@-webkit-keyframes fadeout {
    from { bottom: 30px; opacity: 1; } 
    to { bottom: 0; opacity: 0; }
}

@keyframes fadeout {
    from { bottom: 30px; opacity: 1; }
    to { bottom: 0; opacity: 0; }
}

/* Footer styles */
.footer {
    background-color: var(--bg-nav);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px 0;
    margin-top: 60px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-desc {
    margin-top: 15px;
    color: var(--text-secondary);
    font-size: 14px;
    max-width: 400px;
}

.footer-links h4 {
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links ul a {
    color: var(--text-secondary);
    font-size: 14px;
}

.footer-links ul a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    align-items: center;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
}

.footer-seo-keywords {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.15);
    max-width: 800px;
}

/* Responsive Styles */
@media (max-width: 768px) {
    .nav-toggle-label {
        display: block;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--bg-nav);
        flex-direction: column;
        gap: 0;
        border-top: 1px solid var(--border-color);
        padding: 10px 0;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.4);
        display: none;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-menu li a, .dropdown-trigger {
        padding: 12px 25px;
        display: block;
        width: 100%;
    }
    
    .dropdown-menu {
        position: static;
        display: none;
        background-color: rgba(255, 255, 255, 0.02);
        border: none;
        border-radius: 0;
        box-shadow: none;
        margin-top: 0;
        padding-left: 20px;
    }
    
    .dropdown:hover .dropdown-menu {
        display: flex;
    }
    
    .nav-toggle:checked ~ .nav-menu {
        display: flex;
    }
    
    /* Hamburger animation */
    .nav-toggle:checked ~ .nav-toggle-label span {
        background: transparent;
    }
    
    .nav-toggle:checked ~ .nav-toggle-label span::before {
        transform: rotate(45deg);
        top: 0;
    }
    
    .nav-toggle:checked ~ .nav-toggle-label span::after {
        transform: rotate(-45deg);
        top: 0;
    }
    
    /* Hero */
    .hero-section h1 {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 15px;
    }
    
    /* Layouts */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .action-bar {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .share-section {
        width: 100%;
        justify-content: space-between;
    }
    
    .download-section {
        width: 100%;
    }
    
    .download-section .btn {
        width: 100%;
    }
    
    /* PDF Viewer mobile adaptation */
    .mobile-notice {
        display: block;
    }
    
    .iframe-container {
        /* On small screens, fixed height is better */
        height: 500px;
    }
    
    .iframe-container iframe {
        height: 100%;
    }
    
    .scroll-buttons {
        bottom: 20px;
        right: 20px;
    }
    
    .scroll-buttons button {
        width: 42px;
        height: 42px;
        font-size: 18px;
    }
}

/* Similar Variants section */
.similar-variants {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.similar-variants h2 {
    font-size: 20px;
    margin-bottom: 5px;
    font-weight: 700;
}

.similar-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 20px;
}

.similar-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.similar-card {
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    transition: var(--transition-smooth);
}

.similar-card:hover {
    border-color: rgba(255, 255, 255, 0.12);
    background-color: rgba(255, 255, 255, 0.04);
}

.similar-card h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

/* --- DARK THEME FORCE & ENHANCEMENTS --- */
:root {
    --bg-main: #0b0f19;
    --bg-card: #151d30;
    --bg-nav: #0f172a;
    --border-color: rgba(255, 255, 255, 0.14);
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --primary-color: #38bdf8;
    --primary-gradient: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
    --hover-bg: rgba(56, 189, 248, 0.12);
    --hover-border: #38bdf8;
    --hover-shadow: rgba(56, 189, 248, 0.3);
}

body {
    background-color: var(--bg-main) !important;
    color: var(--text-primary) !important;
}

/* Disable sticky header */
.header {
    position: relative !important;
    top: auto !important;
    background: #0f172a !important;
    border-bottom: 1px solid var(--border-color) !important;
}

/* --- SINGLE ROW NAVBAR TOP BAR (D:\sitesI layout style) --- */
.navbar-top-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 24px;
    gap: 16px;
    background: #0f172a;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.logo-text-slogan {
    font-size: 15px;
    font-weight: 700;
    color: #e2e8f0;
    white-space: nowrap;
    background: linear-gradient(90deg, #38bdf8, #818cf8, #f472b6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.search-box {
    position: relative;
    flex-grow: 1;
    max-width: 600px;
}

.search-box-inner {
    display: flex;
    align-items: center;
    background: #1e293b;
    border: 1.5px solid #38bdf8;
    border-radius: 10px;
    padding: 3px 6px 3px 12px;
    box-shadow: 0 4px 15px rgba(56, 189, 248, 0.15);
}

.search-box-inner input {
    width: 100%;
    background: transparent;
    border: none;
    outline: none;
    color: #f8fafc;
    font-size: 14px;
    font-weight: 500;
}

.search-submit-btn {
    background: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
    color: #ffffff;
    border: none;
    padding: 8px 18px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
}

/* Square Hamburger Menu Button Top Right */
.square-menu-btn {
    width: 40px;
    height: 40px;
    background: #1e293b;
    border: 1.5px solid #38bdf8;
    border-radius: 8px;
    color: #38bdf8;
    font-size: 22px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.2s ease;
    box-shadow: 0 4px 12px rgba(56, 189, 248, 0.2);
}

.square-menu-btn:hover {
    background: #38bdf8;
    color: #0f172a;
    transform: scale(1.05);
}

.search-results-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #1e293b;
    border: 1px solid #38bdf8;
    border-radius: 10px;
    margin-top: 6px;
    max-height: 400px;
    overflow-y: auto;
    z-index: 999;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.search-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    color: #f8fafc;
    text-decoration: none;
    transition: background 0.2s ease;
}

.search-item:hover {
    background: rgba(56, 189, 248, 0.15);
}

.search-item-title {
    font-weight: 600;
    font-size: 15px;
    color: #38bdf8;
}

.search-item-badge {
    font-size: 12px;
    background: #334155;
    padding: 3px 8px;
    border-radius: 6px;
    color: #cbd5e1;
}

/* --- COMPACT HORIZONTAL NAVBAR --- */
.portal-nav-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px !important;
    padding: 6px 16px !important;
    background: #0f172a;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.portal-nav-bar.is-visible {
    display: flex !important;
}

.portal-nav-section {
    display: flex;
    align-items: center;
    gap: 4px;
}

.portal-nav-label {
    font-size: 12px;
    font-weight: 700;
    color: #94a3b8;
    margin-right: 2px;
}

.portal-nav-links, .main-sections-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 5px !important;
}

.portal-nav-links a, .nav-item-btn {
    padding: 4px 10px !important;
    border-radius: 6px !important;
    font-weight: 600 !important;
    font-size: 13px !important;
    text-decoration: none;
    color: #f8fafc;
    background: #1e293b;
    border: 1px solid rgba(255,255,255,0.1);
    transition: all 0.2s ease;
    white-space: nowrap;
}

.portal-nav-links a:hover, .nav-item-btn:hover {
    background: #38bdf8;
    color: #0f172a;
}

.nav-item-btn.active {
    background: linear-gradient(135deg, #38bdf8, #818cf8);
    color: #ffffff;
    border-color: #38bdf8;
}

.portal-nav-divider {
    width: 1px;
    height: 18px;
    background: rgba(255, 255, 255, 0.15);
    margin: 0 4px;
}

/* --- RAISED & COMPACT FLOATING SIDE ACTIONS PANEL --- */
.scroll-buttons {
    position: fixed !important;
    right: 12px !important;
    top: 50% !important;
    transform: translateY(-50%) !important;
    display: flex;
    flex-direction: column;
    gap: 6px !important;
    z-index: 1000;
    opacity: 1 !important;
    visibility: visible !important;
}

.float-group {
    display: flex;
    flex-direction: column;
    gap: 4px !important;
    background: rgba(15, 23, 42, 0.9) !important;
    backdrop-filter: blur(8px);
    padding: 4px !important;
    border-radius: 10px !important;
    border: 1px solid var(--border-color);
    box-shadow: 0 6px 20px rgba(0,0,0,0.5);
}

.float-tool-btn, .nav-shortcut-btn, .float-share-btn, #scroll-up, #scroll-down {
    width: 36px !important;
    height: 36px !important;
    border-radius: 6px !important;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 13px !important;
    border: none;
    cursor: pointer;
    color: #ffffff;
    text-decoration: none;
    transition: all 0.2s ease;
}

.float-menu-btn {
    background: #38bdf8 !important;
    color: #0f172a !important;
    font-size: 18px !important;
}

.float-search-btn {
    background: #818cf8 !important;
    color: #ffffff !important;
    font-size: 16px !important;
}

.float-menu-btn:hover, .float-search-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(56, 189, 248, 0.5);
}

/* TOAST NOTIFICATION */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #10b981;
    color: white;
    padding: 12px 28px;
    border-radius: 30px;
    font-weight: 700;
    font-size: 15px;
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 9999;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

/* --- CONTROL PANEL HEADER STYLES --- */
.controls-wrapper {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-left: auto;
    margin-right: 20px;
}

.control-group {
    display: flex;
    background-color: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2px;
}

.control-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 14px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
}

.control-btn:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.control-btn.active {
    color: white !important;
    background: var(--primary-gradient);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}

/* --- GRID VS LIST LAYOUT STYLES --- */
/* Standard Hover effect (Grid mode) */
.variant-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.clickable-card {
    cursor: pointer;
    transition: background-color 0.25s ease, border-color 0.25s ease, transform 0.2s ease, box-shadow 0.25s ease;
}

.clickable-card:hover {
    background-color: var(--hover-bg) !important;
    border-color: var(--hover-border) !important;
    transform: translateY(-4px);
    box-shadow: 0 10px 25px var(--hover-shadow);
}

/* List Layout (body.layout-list-preferred class applied by JS) */
body.layout-list-preferred .variants-grid,
body.layout-list-preferred .similar-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

body.layout-list-preferred .variants-grid .variant-card-link,
body.layout-list-preferred .similar-grid .variant-card-link {
    width: 100%;
}

body.layout-list-preferred .variants-grid .clickable-card,
body.layout-list-preferred .similar-grid .similar-card {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px !important;
    gap: 20px;
    margin: 0;
    height: auto;
}

body.layout-list-preferred .variants-grid .clickable-card h3,
body.layout-list-preferred .similar-grid .similar-card h3 {
    margin: 0;
    font-size: 15px;
    flex-grow: 1;
    text-align: left;
}

body.layout-list-preferred .variants-grid .clickable-card .card-badges,
body.layout-list-preferred .similar-grid .similar-card .card-badges {
    margin: 0;
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

body.layout-list-preferred .variants-grid .clickable-card .variant-meta,
body.layout-list-preferred .similar-grid .similar-card .variant-meta {
    margin: 0;
    font-size: 13px;
    color: var(--text-secondary);
    flex-shrink: 0;
    min-width: 90px;
    text-align: right;
}

body.layout-list-preferred .variants-grid .clickable-card .variant-brief {
    display: none;
}

/* Hover sliding effect in List mode */
body.layout-list-preferred .variants-grid .clickable-card:hover,
body.layout-list-preferred .similar-grid .similar-card:hover {
    transform: translateX(6px);
    background-color: var(--hover-bg) !important;
    border-color: var(--hover-border) !important;
    box-shadow: -5px 5px 15px var(--hover-shadow);
}

/* Aspect-Ratio optimization for A4 PDFs (narrower iframe container) to decrease side margins inside PDF viewer */
.pdf-viewer {
    margin: 40px 0;
}
.iframe-container {
    width: 95% !important;
    max-width: 100% !important;
    margin: 0 auto !important;
    background: #0f172a;
    border: 1px solid var(--border-color);
    border-radius: 12px !important;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    height: 1100px !important;
}
.iframe-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

@media (max-width: 768px) {
    .iframe-container {
        height: 650px !important;
    }
    
    .controls-wrapper {
        margin-right: 10px;
        gap: 8px;
    }
    
    .control-btn {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }
}

/* --- ONLINE QUIZ STYLES --- */
body.test-mode-active {
    overflow: hidden !important;
}

body.test-mode-active .header,
body.test-mode-active .footer,
body.test-mode-active .breadcrumbs,
body.test-mode-active .variant-description,
body.test-mode-active .action-bar,
body.test-mode-active .similar-variants,
body.test-mode-active .extracted-text-box,
body.test-mode-active .variant-header {
    display: none !important;
}

body.test-mode-active .main-content {
    padding: 0 !important;
    margin: 0 !important;
    max-width: 100% !important;
    width: 100vw !important;
    height: 100vh !important;
}

body.test-mode-active .container {
    max-width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
    height: 100% !important;
}

body.test-mode-active .variant-page {
    display: flex !important;
    flex-direction: row !important;
    height: 100vh !important;
    border-radius: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    border: none !important;
    max-width: 100% !important;
    width: 100vw !important;
}

body.test-mode-active .pdf-viewer {
    display: none !important;
}

body.test-mode-active .pdf-viewer h2,
body.test-mode-active .pdf-viewer .mobile-notice {
    display: none !important;
}

body.test-mode-active .iframe-container {
    display: none !important;
}

.test-container {
    width: 100% !important;
    max-width: 100% !important;
    height: 100vh !important;
    display: flex !important;
    flex-direction: column !important;
    background-color: var(--bg-card);
    overflow-y: auto !important;
}

.test-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background-color: var(--bg-nav);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 10;
}

.test-panel-header h3 {
    margin: 0;
    font-size: 16px;
    font-weight: 700;
}

.test-actions {
    display: flex;
    gap: 8px;
}

.test-questions-panel {
    padding: 24px;
    overflow-y: auto;
}

.test-instruction-note {
    font-size: 13px;
    color: var(--text-secondary);
    background-color: rgba(99, 102, 241, 0.05);
    border-left: 3px solid var(--primary-color);
    padding: 12px;
    margin-bottom: 24px;
    border-radius: 0 8px 8px 0;
}

.test-question-item {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.test-q-label {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 6px;
}

.test-q-desc {
    font-size: 13px;
    color: var(--text-primary);
    margin-bottom: 12px;
    line-height: 1.4;
}

.test-q-img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin-bottom: 12px;
    border: 1px solid var(--border-color);
    background-color: #ffffff;
    padding: 8px;
}

.test-input-wrapper {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.test-answer-input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    font-size: 14px;
    transition: var(--transition-smooth);
}

body.theme-light .test-answer-input {
    background-color: rgba(0, 0, 0, 0.02);
}

.test-answer-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.test-answer-input.correct {
    border-color: #10b981 !important;
    background-color: rgba(16, 185, 129, 0.08) !important;
}

.test-answer-input.incorrect {
    border-color: #ef4444 !important;
    background-color: rgba(239, 68, 68, 0.08) !important;
}

.result-indicator {
    font-size: 12px;
    font-weight: 600;
    display: none;
}

.result-indicator.correct {
    display: inline-block;
    color: #10b981;
}

.result-indicator.incorrect {
    display: inline-block;
    color: #ef4444;
}

.test-results-panel {
    padding: 24px;
    background-color: rgba(99, 102, 241, 0.05);
    border-bottom: 1px solid var(--border-color);
}

.results-card {
    padding: 24px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.results-card h4 {
    margin-top: 0;
    font-size: 18px;
    color: var(--text-primary);
}

.result-score-wrapper, .result-pct-wrapper {
    margin: 12px 0;
    font-size: 15px;
}

.result-score-value {
    font-size: 20px;
    font-weight: 800;
    color: var(--primary-color);
    margin-left: 8px;
}

.result-pct-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-left: 8px;
}

.result-details {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.results-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
}

@media (max-width: 992px) {
    body.test-mode-active .variant-page {
        flex-direction: column !important;
        overflow-y: auto !important;
    }
    body.test-mode-active .pdf-viewer {
        width: 100% !important;
        height: 50vh !important;
    }
    body.test-mode-active .iframe-container {
        height: 50vh !important;
    }
    body.test-mode-active .test-container {
        width: 100% !important;
        height: 50vh !important;
    }
}

.test-header-controls {
    margin-left: 20px;
    margin-right: auto;
}

.instant-check-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.instant-check-label input[type="checkbox"] {
    accent-color: var(--primary-color);
    width: 16px;
    height: 16px;
    margin: 0;
    cursor: pointer;
}

.test-options-wrapper {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 12px;
}

.test-option-label {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.03);
    cursor: pointer;
    transition: var(--transition-smooth);
    font-size: 14px;
    color: var(--text-primary);
}

body.theme-light .test-option-label {
    background-color: rgba(0, 0, 0, 0.01);
}

.test-option-label:hover {
    background-color: var(--hover-bg);
    border-color: var(--hover-border);
}

.test-option-label input[type="radio"] {
    accent-color: var(--primary-color);
    width: 18px;
    height: 18px;
    margin: 0;
    cursor: pointer;
    flex-shrink: 0;
}

.test-option-label.correct {
    border-color: #10b981 !important;
    background-color: rgba(16, 185, 129, 0.08) !important;
    color: #10b981 !important;
    font-weight: 600;
}

.test-option-label.incorrect {
    border-color: #ef4444 !important;
    background-color: rgba(239, 68, 68, 0.08) !important;
    color: #ef4444 !important;
}

.test-option-label.is-correct-answer {
    border-color: #10b981 !important;
    background-color: rgba(16, 185, 129, 0.04) !important;
    color: #10b981 !important;
    font-weight: 600;
}

/* Flattened Top Navigation overrides */
.nav-toggle, .nav-toggle-label {
    display: none !important;
}

.nav-menu {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: wrap !important;
    gap: 8px !important;
    list-style: none !important;
    margin: 0 !important;
    padding: 0 !important;
    margin-left: auto !important;
}

.nav-menu li {
    margin: 0 !important;
}

.nav-menu li a {
    display: block !important;
    padding: 6px 12px !important;
    font-size: 13px !important;
    font-weight: 600 !important;
    color: var(--text-secondary) !important;
    border-radius: 20px !important;
    text-decoration: none !important;
    transition: var(--transition-smooth) !important;
}

.nav-menu li a:hover,
.nav-menu li a.active {
    color: white !important;
    background: var(--primary-gradient) !important;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3) !important;
}

body.theme-light .nav-menu li a:hover,
body.theme-light .nav-menu li a.active {
    color: white !important;
}

@media (max-width: 992px) {
    .nav-container {
        flex-direction: column !important;
        gap: 15px !important;
        padding: 15px !important;
    }
    
    .nav-menu {
        margin: 0 auto !important;
        justify-content: center !important;
        width: 100% !important;
    }
    
    .controls-wrapper {
        margin: 0 auto !important;
        margin-bottom: 5px !important;
    }
}

/* Maximize PDF iframe viewer sizes on variant pages */
body[data-variant-id] .container {
    max-width: 98% !important;
    width: 98% !important;
    padding: 0 10px !important;
}

body[data-variant-id] .variant-page {
    padding: 16px !important;
    max-width: 100% !important;
    width: 100% !important;
}

body[data-variant-id] .iframe-container {
    width: 95% !important;
    max-width: 100% !important;
    height: 1200px !important;
    margin: 0 auto !important;
}

/* --- FULLSCREEN POPUP BOX WINDOW (MODAL OVERLAY) --- */
.pdf-modal-overlay {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    background-color: rgba(15, 23, 42, 0.98) !important;
    z-index: 9999999 !important;
    display: none;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px) !important;
}

body.theme-light .pdf-modal-overlay {
    background-color: rgba(248, 250, 252, 0.98) !important;
}

.pdf-modal-container {
    width: 100% !important;
    height: 100% !important;
    display: flex !important;
    flex-direction: column !important;
    overflow: hidden !important;
}

.pdf-modal-toolbar {
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    padding: 12px 24px !important;
    background-color: var(--bg-card) !important;
    border-bottom: 1px solid var(--border-color) !important;
}

.pdf-modal-nav, .pdf-modal-zoom {
    display: flex !important;
    align-items: center !important;
    gap: 10px !important;
}

.pdf-modal-close {
    background: none !important;
    border: none !important;
    color: var(--text-primary) !important;
    font-size: 36px !important;
    cursor: pointer !important;
    line-height: 1 !important;
    transition: var(--transition-smooth) !important;
    padding: 0 10px !important;
}

.pdf-modal-close:hover {
    color: #ef4444 !important;
}

.pdf-modal-viewport {
    flex: 1 !important;
    overflow: auto !important;
    display: flex !important;
    align-items: flex-start !important;
    justify-content: center !important;
    padding: 30px !important;
    background-color: #090d16 !important;
}

body.theme-light .pdf-modal-viewport {
    background-color: #f1f5f9 !important;
}

.pdf-image-wrapper {
    transition: transform 0.2s cubic-bezier(0.1, 0.9, 0.2, 1) !important;
    transform-origin: top center !important;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5) !important;
    background-color: white !important;
    max-width: 900px !important;
    width: 100% !important;
}

.pdf-page-img {
    display: block !important;
    width: 100% !important;
    height: auto !important;
    user-select: none !important;
}

.test-questions-panel {
    max-width: 850px !important;
    width: 100% !important;
    margin: 0 auto !important;
}

/* --- PREMIUM OVERLAY MODAL (VOX WINDOW) --- */
.test-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--bg-card) !important;
    z-index: 100000 !important;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 !important;
    box-sizing: border-box;
}

body.theme-light .test-modal-overlay {
    background-color: var(--bg-card) !important;
}

.test-modal-content {
    width: 100vw !important;
    max-width: 100% !important;
    height: 100vh !important;
    max-height: 100% !important;
    background-color: var(--bg-card) !important;
    border: none !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    display: flex !important;
    flex-direction: column !important;
    overflow: hidden !important;
    animation: zoomIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.test-modal-header {
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    padding: 16px 24px !important;
    border-bottom: 1px solid var(--border-color) !important;
    background-color: rgba(0, 0, 0, 0.15) !important;
}

body.theme-light .test-modal-header {
    background-color: rgba(0, 0, 0, 0.03) !important;
}

.test-modal-header h3 {
    margin: 0 !important;
    font-size: 16px !important;
    color: var(--text-primary) !important;
}

.test-modal-progress {
    font-size: 13px !important;
    color: var(--text-secondary) !important;
    font-weight: 600 !important;
    background-color: var(--hover-bg) !important;
    padding: 4px 12px !important;
    border-radius: 20px !important;
}

.modal-close-btn {
    background: none !important;
    border: none !important;
    color: var(--text-secondary) !important;
    font-size: 24px !important;
    cursor: pointer !important;
    line-height: 1 !important;
    transition: var(--transition-smooth) !important;
}

.modal-close-btn:hover {
    color: var(--primary-color) !important;
}

.test-modal-body {
    flex: 1 !important;
    overflow-y: auto !important;
    padding: 24px !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
}

.test-modal-footer {
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    padding: 16px 24px !important;
    border-top: 1px solid var(--border-color) !important;
    background-color: rgba(0, 0, 0, 0.15) !important;
}

body.theme-light .test-modal-footer {
    background-color: rgba(0, 0, 0, 0.03) !important;
}

.test-slides-container {
    width: 100% !important;
    max-width: 850px !important;
    margin: 0 auto !important;
}

.test-modal-results {
    width: 100% !important;
    max-width: 600px !important;
    margin: auto !important;
}

.test-slide {
    display: none;
    animation: slideFadeIn 0.3s ease;
}

.test-slide.active {
    display: block !important;
}

@keyframes slideFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes zoomIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Fullscreen API styles for PDF Iframe Wrapper */
#pdf-iframe-wrapper:fullscreen {
    width: 100vw !important;
    height: 100vh !important;
    max-width: 100vw !important;
    background-color: #0f172a !important;
    padding: 0 !important;
    margin: 0 !important;
    border: none !important;
    border-radius: 0 !important;
}

#pdf-iframe-wrapper:-webkit-full-screen {
    width: 100vw !important;
    height: 100vh !important;
    max-width: 100vw !important;
    background-color: #0f172a !important;
}

#pdf-iframe-wrapper:-moz-full-screen {
    width: 100vw !important;
    height: 100vh !important;
    max-width: 100vw !important;
    background-color: #0f172a !important;
}

#pdf-iframe-wrapper:-ms-fullscreen {
    width: 100vw !important;
    height: 100vh !important;
    max-width: 100vw !important;
    background-color: #0f172a !important;
}

#pdf-iframe-wrapper:fullscreen iframe {
    width: 100% !important;
    height: 100% !important;
    border: none !important;
    border-radius: 0 !important;
}

/* --- CUSTOM IMAGE-BASED PDF VIEWER STYLES --- */
.custom-pdf-viewer {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background-color: #0f172a;
    overflow: hidden;
    margin: 20px auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    max-width: 850px;
    width: 100%;
}

.pdf-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 12px;
}

.pdf-nav-controls, .pdf-zoom-controls, .pdf-fullscreen-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.pdf-btn {
    background-color: var(--hover-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    transition: var(--transition-smooth);
}

.pdf-btn:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.pdf-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.pdf-page-num, .pdf-zoom-level {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
}

.pdf-viewport {
    height: 1000px;
    overflow: auto;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 20px;
    background-color: #090d16;
}

.pdf-image-wrapper {
    transition: transform 0.2s cubic-bezier(0.1, 0.9, 0.2, 1);
    transform-origin: top center;
    box-shadow: 0 5px 25px rgba(0,0,0,0.5);
    background-color: white;
}

.pdf-page-img {
    display: block;
    max-width: 100%;
    height: auto;
    user-select: none;
}

/* Fullscreen mode styling overrides */
.custom-pdf-viewer:fullscreen {
    width: 100vw !important;
    height: 100vh !important;
    max-width: 100vw !important;
    max-height: 100vh !important;
    border-radius: 0 !important;
    border: none !important;
}

.custom-pdf-viewer:fullscreen .pdf-viewport {
    height: calc(100vh - 65px) !important;
}

.custom-pdf-viewer:fullscreen .btn-fullscreen-toggle {
    display: none !important;
}

.custom-pdf-viewer:fullscreen .btn-exit-fs {
    display: block !important;
}

.custom-pdf-viewer:-webkit-full-screen {
    width: 100vw !important;
    height: 100vh !important;
    max-width: 100vw !important;
    max-height: 100vh !important;
    border-radius: 0 !important;
    border: none !important;
}
.custom-pdf-viewer:-webkit-full-screen .pdf-viewport {
    height: calc(100vh - 65px) !important;
}
.custom-pdf-viewer:-webkit-full-screen .btn-fullscreen-toggle {
    display: none !important;
}
.custom-pdf-viewer:-webkit-full-screen .btn-exit-fs {
    display: block !important;
}

/* Hide file size metadata completely */
.variant-meta {
    display: none !important;
}

/* Hub Selection Cards Styles */
.hub-grid {
    display: grid !important;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)) !important;
    gap: 20px !important;
    margin-bottom: 40px !important;
    margin-top: 15px !important;
}

.hub-card {
    background: var(--bg-card) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 12px !important;
    padding: 24px !important;
    text-align: center !important;
    transition: var(--transition-smooth) !important;
    text-decoration: none !important;
    color: inherit !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    box-shadow: var(--shadow-premium) !important;
}

.hub-card:hover {
    transform: translateY(-4px) !important;
    border-color: var(--hover-border) !important;
    box-shadow: 0 10px 20px var(--hover-shadow) !important;
}

.hub-card h3 {
    margin: 0 0 10px 0 !important;
    font-size: 18px !important;
    font-weight: 700 !important;
    color: var(--text-primary) !important;
}

.hub-card p {
    margin: 0 !important;
    font-size: 13px !important;
    color: var(--text-secondary) !important;
    line-height: 1.5 !important;
}

.hub-card .hub-icon {
    font-size: 36px !important;
    margin-bottom: 12px !important;
    background: var(--primary-gradient) !important;
    -webkit-background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
}

/* Force List layout to be structured in a 2-column grid on desktop */
body.layout-list-preferred .variants-grid,
body.layout-list-preferred .similar-grid {
    display: grid !important;
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 12px !important;
    width: 100% !important;
}

/* Hide separator lines */
.scroll-buttons .float-separator {
    display: none !important;
}

/* Compact Rectangular Floating Action Panel */
.scroll-buttons {
    right: 8px !important;
    bottom: 40px !important;
    gap: 16px !important; /* Spacing between groups */
    position: fixed !important;
    display: flex !important;
    flex-direction: column !important;
    z-index: 1000 !important;
    opacity: 0;
    pointer-events: none;
    transform: translateX(15px);
    transition: opacity 0.3s ease, transform 0.3s ease !important;
}

/* --- VERTICAL FLOATING ACTIONS PANEL (RAISED HIGHER BY 2 BUTTONS) --- */
.scroll-buttons {
    position: fixed !important;
    right: 8px !important;
    top: 50% !important;
    transform: translateY(calc(-50% - 72px)) !important;
    display: flex !important;
    flex-direction: column !important;
    flex-wrap: nowrap !important;
    gap: 4px !important;
    z-index: 999999 !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
}

.scroll-buttons .float-group {
    display: flex !important;
    flex-direction: column !important;
    flex-wrap: nowrap !important;
    gap: 4px !important;
    background: rgba(15, 23, 42, 0.92) !important;
    backdrop-filter: blur(8px);
    padding: 4px !important;
    border-radius: 8px !important;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
}

/* Make ALL 11 side floating buttons exact same size */
.scroll-buttons button,
.scroll-buttons a.nav-shortcut-btn,
.scroll-buttons button#scroll-up,
.scroll-buttons button#scroll-down {
    width: 34px !important;
    height: 32px !important;
    border-radius: 6px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    font-weight: 700 !important;
    font-size: 11px !important;
    border: none !important;
    cursor: pointer !important;
    color: #ffffff !important;
    text-decoration: none !important;
    transition: transform 0.2s ease, filter 0.2s ease !important;
    box-sizing: border-box !important;
}

.scroll-buttons button:hover,
.scroll-buttons a.nav-shortcut-btn:hover {
    transform: scale(1.12) !important;
    filter: brightness(1.15) !important;
}

.scroll-buttons .float-oge { background: var(--primary-gradient) !important; }
.scroll-buttons .float-ege { background: var(--primary-gradient) !important; }
.scroll-buttons .float-vpr { background: var(--primary-gradient) !important; }

.scroll-buttons .float-wa { background: #25D366 !important; }
.scroll-buttons .float-vk { background: #4C75A3 !important; }
.scroll-buttons .float-tg { background: #0088cc !important; }
.scroll-buttons .float-copy { background: var(--primary-gradient) !important; font-size: 13px !important; }

.scroll-buttons button#scroll-up,
.scroll-buttons button#scroll-down {
    background: #374151 !important;
    color: white !important;
    font-size: 13px !important;
    font-weight: 700 !important;
}

/* Compact 1-Column Scaling on Zoom / Short Screens */
@media (max-height: 750px) {
    .scroll-buttons {
        gap: 3px !important;
        right: 4px !important;
    }
    .scroll-buttons .float-group {
        gap: 3px !important;
        padding: 3px !important;
    }
    .scroll-buttons button,
    .scroll-buttons a.nav-shortcut-btn,
    .scroll-buttons button#scroll-up,
    .scroll-buttons button#scroll-down {
        width: 30px !important;
        height: 26px !important;
        font-size: 10px !important;
    }
}

@media (max-width: 768px) {
    .scroll-buttons {
        right: 4px !important;
        top: 20px !important;
        gap: 2px !important;
    }
    .scroll-buttons button,
    .scroll-buttons a.nav-shortcut-btn {
        width: 24px !important;
        height: 24px !important;
        font-size: 9px !important;
    }
}

/* OGE, EGE, VPR Cards Hover Highlight & Scale Zoom (D:\sitesI style) */
.nav-shortcuts .shortcut-card,
.nav-shortcuts .exam-card-main,
.shortcuts-grid a.shortcut-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease !important;
}

.nav-shortcuts .shortcut-card:hover,
.nav-shortcuts .exam-card-main:hover,
.shortcuts-grid a.shortcut-card:hover {
    transform: translateY(-6px) scale(1.03) !important;
    border-color: #38bdf8 !important;
    box-shadow: 0 12px 30px rgba(56, 189, 248, 0.35), 0 0 20px rgba(56, 189, 248, 0.25) !important;
}

/* --- COMPACT SINGLE-ROW HORIZONTAL NAVBAR WITH TOGGLE SUPPORT --- */
.portal-nav-bar {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: wrap !important;
    align-items: center !important;
    gap: 4px !important;
    padding: 6px 12px !important;
    background: #0f172a !important;
    border-top: 1px solid rgba(255, 255, 255, 0.08) !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08) !important;
    width: 100% !important;
    box-sizing: border-box !important;
    transition: max-height 0.3s ease, opacity 0.3s ease !important;
}

.portal-nav-bar.is-collapsed {
    display: none !important; /* Menu collapses/hides when user toggles menu button! */
}

.portal-nav-section, .portal-nav-links, .main-sections-group {
    display: contents !important;
}

.portal-nav-label, .portal-nav-divider {
    display: none !important; /* Hide labels so all buttons sit next to each other */
}

.portal-nav-bar a {
    padding: 4px 8px !important;
    border-radius: 5px !important;
    font-weight: 600 !important;
    font-size: 12px !important;
    text-decoration: none !important;
    color: #cbd5e1 !important;
    background: #1e293b !important;
    border: 1px solid rgba(255,255,255,0.08) !important;
    transition: all 0.2s ease !important;
    white-space: nowrap !important;
    display: inline-flex !important;
    align-items: center !important;
    margin: 0 !important;
}

.portal-nav-bar a:hover {
    background: #38bdf8 !important;
    color: #0f172a !important;
}

.portal-nav-bar a.active {
    background: linear-gradient(135deg, #38bdf8, #818cf8) !important;
    color: #ffffff !important;
    border-color: #38bdf8 !important;
}

/* --- REMOVE EMPTY SPACES AROUND AD BLOCKS & SECTIONS (Screenshot 4 & 5 Fixes) --- */
.reklam-block-container {
    margin: 6px auto !important;
    padding: 0 !important;
}

.main-content {
    min-height: auto !important;
    padding-top: 5px !important;
    padding-bottom: 5px !important;
}

.hero-section {
    padding: 8px 0 !important;
    margin: 6px 0 !important;
    text-align: center !important;
}

.hero-section h1 {
    font-size: 22px !important;
    font-weight: 800 !important;
    margin-top: 0 !important;
    margin-bottom: 4px !important;
}

.hero-section p.hero-subtitle {
    font-size: 13px !important;
    margin: 0 !important;
    color: #cbd5e1 !important;
}

.nav-shortcuts, .shortcuts-grid, .hub-grid {
    margin-top: 10px !important;
    margin-bottom: 10px !important;
}

.footer {
    margin-top: 15px !important;
    padding-top: 15px !important;
}

/* --- FOOTER CLEANUP (Screenshot 2 Fix) --- */
.footer-grid {
    display: block !important;
}

.footer-links {
    display: none !important; /* Hide bottom navigation & subjects menu */
}

.portal-nav-links a {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    padding: 6px 14px;
    border-radius: 20px;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.portal-nav-links a:hover {
    color: white !important;
    background: var(--primary-gradient) !important;
    border-color: transparent !important;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4) !important;
    transform: translateY(-1px);
}

/* Sub-filter Navigation Bars */
.sub-filter-bar {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 18px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.sub-filter-label {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
    min-width: 90px;
}

.sub-filter-links {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.sub-filter-item {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    border-radius: 6px;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.sub-filter-item:hover {
    color: white !important;
    background-color: var(--hover-bg) !important;
}

.sub-filter-item.active {
    color: white !important;
    background: var(--primary-gradient) !important;
    border-color: transparent !important;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3) !important;
}

/* Premium Collapsible Block Styles (Globalized) */
details.premium-details {
    width: 100%;
    margin-top: 10px;
}
details.premium-details summary {
    display: flex !important;
    align-items: center !important;
    justify-content: flex-start !important;
    cursor: pointer !important;
    list-style: none !important;
    outline: none !important;
    user-select: none !important;
    padding-bottom: 12px !important;
    border-bottom: 1px solid var(--border-color) !important;
    gap: 10px !important;
}
details.premium-details summary::-webkit-details-marker {
    display: none !important;
}
details.premium-details summary .summary-btn {
    display: inline-flex !important;
    align-items: center !important;
    font-weight: 700 !important;
    font-size: 12px !important;
    color: white !important;
    padding: 5px 14px !important;
    border-radius: 12px !important;
    background: var(--primary-gradient) !important;
    border: none !important;
    box-shadow: 0 4px 10px rgba(99, 102, 241, 0.3) !important;
    transition: transform 0.2s ease, box-shadow 0.2s ease !important;
    white-space: nowrap !important;
    cursor: pointer !important;
}
details.premium-details summary:hover .summary-btn {
    transform: scale(1.05) !important;
    box-shadow: 0 6px 15px rgba(99, 102, 241, 0.5) !important;
}
details.premium-details summary .summary-btn-desc::before {
    content: "читать описание" !important;
}
details.premium-details[open] summary .summary-btn-desc::before {
    content: "скрыть описание" !important;
}
details.premium-details summary .summary-btn-text::before {
    content: "показать текст" !important;
}
details.premium-details[open] summary .summary-btn-text::before {
    content: "скрыть текст" !important;
}
.premium-details-content {
    margin-top: 15px;
    padding: 20px;
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px dashed var(--border-color);
    border-radius: 12px;
    animation: slideDown 0.3s ease-out;
}
body.theme-light .premium-details-content {
    background-color: rgba(0, 0, 0, 0.01);
}

/* Force clean compact 2-column listing format by default */
.variants-grid, .similar-grid {
    display: grid !important;
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 12px !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-right: 60px !important; /* Narrow columns slightly to leave clear gutter for scroll buttons */
}

@media (max-width: 768px) {
    .variants-grid, .similar-grid {
        grid-template-columns: 1fr !important;
        padding-right: 48px !important; /* Margin for scroll buttons on mobile */
    }
}

/* Category Description Accordion Button Text: показать текст / скрыть текст */
details.premium-details summary .summary-btn-text::before {
    content: "показать текст" !important;
}
details.premium-details[open] summary .summary-btn-text::before {
    content: "скрыть текст" !important;
}

@media (max-width: 768px) {
    .variants-grid, .similar-grid {
        grid-template-columns: 1fr !important;
    }
}

.variant-card-link {
    width: 100% !important;
    text-decoration: none !important;
}

.variant-card, .similar-card {
    display: flex !important;
    flex-direction: row !important;
    align-items: center !important;
    justify-content: space-between !important;
    padding: 12px 20px !important;
    gap: 20px !important;
    margin: 0 !important;
    height: auto !important;
    background: var(--bg-card) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 8px !important;
    transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease !important;
}

.variant-card h3, .similar-card h3 {
    margin: 0 !important;
    font-size: 15px !important;
    font-weight: 700 !important;
    color: var(--text-primary) !important;
    flex-grow: 1 !important;
    text-align: left !important;
}

.variant-card .card-badges, .similar-card .card-badges {
    margin: 0 !important;
    display: flex !important;
    gap: 8px !important;
    flex-shrink: 0 !important;
}

.variant-card .variant-meta, .similar-card .variant-meta,
.variant-card .variant-brief, .similar-card .variant-brief {
    display: none !important; /* Hide file size and descriptions */
}

.variant-card:hover, .similar-card:hover {
    transform: translateX(6px) !important;
    background-color: var(--hover-bg) !important;
    border-color: var(--hover-border) !important;
    box-shadow: -5px 5px 15px var(--hover-shadow) !important;
}

/* Compact spacing and zero dead-space layout */
.main-content {
    padding: 10px 0 !important;
}

.pdf-viewer {
    margin: 10px 0 15px 0 !important;
}

.pdf-viewer-header {
    margin-bottom: 10px !important;
    padding: 8px 15px !important;
}

.variant-header {
    margin-bottom: 10px !important;
}

.variant-header h1 {
    font-size: 22px !important;
    margin: 8px 0 6px 0 !important;
}

.variant-description {
    margin-top: 10px !important;
}

.similar-variants {
    margin-top: 15px !important;
}

.similar-variants h2 {
    font-size: 18px !important;
    margin-bottom: 10px !important;
}

.similar-subtitle {
    margin-bottom: 10px !important;
    font-size: 13px !important;
}

.extracted-text-box {
    margin-top: 15px !important;
    padding: 0 !important;
}

.vk-comments-section {
    margin-top: 15px !important;
    margin-bottom: 10px !important;
}

.footer {
    margin-top: 15px !important;
    padding: 15px 0 10px 0 !important;
}

/* ==========================================================================
   PROMINENT FILTER BARS (SUBJECT & CLASS SELECTION BUTTONS)
   ========================================================================== */
.sub-filter-bar {
    display: flex !important;
    flex-wrap: wrap !important;
    align-items: center !important;
    gap: 12px !important;
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.95), rgba(15, 23, 42, 0.98)) !important;
    border: 2px solid rgba(99, 102, 241, 0.35) !important;
    border-radius: 12px !important;
    padding: 14px 18px !important;
    margin: 15px 0 20px 0 !important;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45), inset 0 1px 1px rgba(255, 255, 255, 0.1) !important;
}

.sub-filter-label {
    font-size: 15px !important;
    font-weight: 800 !important;
    color: #f8fafc !important;
    text-transform: uppercase !important;
    letter-spacing: 0.5px !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 6px !important;
    padding-right: 6px !important;
}

.sub-filter-links {
    display: flex !important;
    flex-wrap: wrap !important;
    gap: 8px !important;
    align-items: center !important;
    flex-grow: 1 !important;
}

.sub-filter-item {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 8px 16px !important;
    font-size: 13.5px !important;
    font-weight: 700 !important;
    color: #e2e8f0 !important;
    background: rgba(255, 255, 255, 0.07) !important;
    border: 1.5px solid rgba(255, 255, 255, 0.14) !important;
    border-radius: 8px !important;
    text-decoration: none !important;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1) !important;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2) !important;
    cursor: pointer !important;
}

.sub-filter-item:hover {
    color: #ffffff !important;
    background: rgba(99, 102, 241, 0.3) !important;
    border-color: #818cf8 !important;
    transform: translateY(-2px) scale(1.03) !important;
    box-shadow: 0 6px 15px rgba(99, 102, 241, 0.35) !important;
}

.sub-filter-item.active {
    color: #ffffff !important;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%) !important;
    border-color: #a5b4fc !important;
    box-shadow: 0 4px 18px rgba(99, 102, 241, 0.6) !important;
    font-weight: 800 !important;
    transform: translateY(-1px) !important;
}

@media (max-width: 768px) {
    .sub-filter-bar {
        padding: 10px 12px !important;
        gap: 8px !important;
    }
    .sub-filter-label {
        width: 100% !important;
        margin-bottom: 2px !important;
        font-size: 13px !important;
    }
    .sub-filter-item {
        padding: 6px 12px !important;
        font-size: 12px !important;
    }
}


/* =========================================================
   FIX FOR MOBILE HEADER, NAVBAR & MENU (RESPONSIVE OVERRIDE)
   ========================================================= */
@media (max-width: 768px) {
    /* Prevent any page horizontal overflow */
    html, body {
        overflow-x: hidden !important;
        max-width: 100vw !important;
    }
    
    .container {
        padding: 0 10px !important;
        max-width: 100% !important;
    }

    /* 1. Header Top Row: clean single row on mobile without breaking boundaries */
    .navbar-top-row {
        display: flex !important;
        flex-wrap: nowrap !important;
        align-items: center !important;
        justify-content: space-between !important;
        padding: 8px 10px !important;
        gap: 8px !important;
        width: 100% !important;
        max-width: 100vw !important;
        box-sizing: border-box !important;
    }

    /* Hide long slogan on mobile so search & burger menu fit smoothly */
    .logo-text-slogan {
        display: none !important;
    }

    .logo {
        flex-shrink: 0 !important;
        margin: 0 !important;
    }

    .logo-icon {
        width: 32px !important;
        height: 32px !important;
        font-size: 15px !important;
    }

    /* Search bar takes available space in center */
    .search-box {
        flex: 1 1 auto !important;
        min-width: 0 !important;
        max-width: 100% !important;
        margin: 0 !important;
    }

    .search-box-inner {
        padding: 2px 4px 2px 8px !important;
        border-radius: 6px !important;
    }

    .search-box-inner input {
        font-size: 12px !important;
        min-width: 0 !important;
    }

    .search-submit-btn {
        padding: 5px 8px !important;
        font-size: 11px !important;
    }

    /* Burger Menu button always firmly visible top-right */
    .square-menu-btn {
        width: 34px !important;
        height: 34px !important;
        font-size: 18px !important;
        flex-shrink: 0 !important;
        margin: 0 !important;
    }

    /* 2. Portal Navigation Menu: Clean wrapped mobile grid */
    .portal-nav-bar {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: wrap !important;
        align-items: center !important;
        justify-content: flex-start !important;
        gap: 5px !important;
        padding: 10px 8px !important;
        width: 100% !important;
        max-width: 100vw !important;
        box-sizing: border-box !important;
        background: #0f172a !important;
        border-top: 1px solid rgba(255, 255, 255, 0.1) !important;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1) !important;
    }

    .portal-nav-bar.is-collapsed {
        display: none !important;
    }

    .portal-nav-bar a {
        padding: 5px 9px !important;
        font-size: 11.5px !important;
        border-radius: 6px !important;
        white-space: normal !important;
        text-align: center !important;
        line-height: 1.2 !important;
        box-sizing: border-box !important;
    }

    /* Exam top badges in menu */
    .main-sections-group a,
    .portal-nav-bar a.nav-item-btn {
        font-weight: 700 !important;
        font-size: 12.5px !important;
        padding: 6px 12px !important;
    }

    /* Sub-filters (exam subject filters) */
    .sub-filter-bar {
        padding: 8px !important;
        gap: 6px !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .sub-filter-links {
        gap: 5px !important;
    }

    .sub-filter-item {
        padding: 5px 10px !important;
        font-size: 11.5px !important;
    }
}


/* =========================================================
   COMPREHENSIVE FIX FOR MOBILE MENU TOGGLE & FLOATING BUTTONS
   ========================================================= */

/* Ensure portal-nav-bar obeys toggling with .is-collapsed / .is-open across all viewports */
.portal-nav-bar.is-collapsed {
    display: none !important;
}

.portal-nav-bar.is-open {
    display: flex !important;
}

/* Ensure vertical side floating buttons are ALWAYS visible on mobile and desktop */
.scroll-buttons {
    position: fixed !important;
    right: 6px !important;
    top: 50% !important;
    transform: translateY(-50%) !important;
    display: flex !important;
    flex-direction: column !important;
    flex-wrap: nowrap !important;
    gap: 3px !important;
    z-index: 9999999 !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
}

.scroll-buttons .float-group {
    display: flex !important;
    flex-direction: column !important;
    flex-wrap: nowrap !important;
    gap: 3px !important;
    background: rgba(15, 23, 42, 0.95) !important;
    backdrop-filter: blur(8px) !important;
    padding: 3px !important;
    border-radius: 8px !important;
    border: 1px solid rgba(56, 189, 248, 0.4) !important;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.6) !important;
}

.scroll-buttons button,
.scroll-buttons a.nav-shortcut-btn,
.scroll-buttons button#scroll-up,
.scroll-buttons button#scroll-down {
    width: 32px !important;
    height: 28px !important;
    border-radius: 6px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    font-weight: 700 !important;
    font-size: 11px !important;
    border: none !important;
    cursor: pointer !important;
    color: #ffffff !important;
    text-decoration: none !important;
    box-sizing: border-box !important;
    opacity: 1 !important;
    visibility: visible !important;
}

@media (max-width: 768px) {
    .scroll-buttons {
        right: 4px !important;
        top: 50% !important;
        transform: translateY(-50%) !important;
        gap: 2px !important;
    }
    
    .scroll-buttons .float-group {
        padding: 2px !important;
        gap: 2px !important;
    }

    .scroll-buttons button,
    .scroll-buttons a.nav-shortcut-btn,
    .scroll-buttons button#scroll-up,
    .scroll-buttons button#scroll-down {
        width: 28px !important;
        height: 25px !important;
        font-size: 9.5px !important;
    }
}


/* =========================================================
   ENLARGED MOBILE NAVIGATION & FLOATING ACTION BUTTONS
   ========================================================= */

@media (max-width: 768px) {
    /* 1. Header Navigation & Top Menu Links */
    .portal-nav-bar {
        gap: 8px 6px !important;
        padding: 12px 10px !important;
    }

    .portal-nav-bar a {
        padding: 8px 12px !important;
        font-size: 14px !important;
        font-weight: 600 !important;
        border-radius: 8px !important;
        line-height: 1.3 !important;
        min-height: 38px !important;
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
    }

    /* Top Badges (Главная, ОГЭ, ЕГЭ, ВПР) in menu */
    .main-sections-group a,
    .portal-nav-bar a.nav-item-btn {
        font-size: 15px !important;
        font-weight: 800 !important;
        padding: 9px 16px !important;
        min-height: 42px !important;
    }

    /* Top hamburger menu icon button */
    .square-menu-btn {
        width: 44px !important;
        height: 44px !important;
        font-size: 24px !important;
    }

    /* Top Search Box Elements */
    .search-box-inner input {
        font-size: 14px !important;
    }
    .search-submit-btn {
        padding: 7px 12px !important;
        font-size: 13px !important;
    }

    /* 2. Side Floating Action Buttons (Right vertical dock) */
    .scroll-buttons {
        right: 6px !important;
        top: 50% !important;
        transform: translateY(-50%) !important;
        gap: 4px !important;
        z-index: 9999999 !important;
    }
    
    .scroll-buttons .float-group {
        padding: 3px !important;
        gap: 3px !important;
        border-radius: 8px !important;
    }

    .scroll-buttons button,
    .scroll-buttons a.nav-shortcut-btn,
    .scroll-buttons button#scroll-up,
    .scroll-buttons button#scroll-down {
        width: 36px !important;
        height: 34px !important;
        font-size: 13px !important;
        font-weight: 800 !important;
        border-radius: 6px !important;
    }

    /* Specific font sizes for emoji & icons in floating panel */
    .scroll-buttons .float-menu-btn,
    .scroll-buttons .float-search-btn,
    .scroll-buttons .float-copy,
    .scroll-buttons button#scroll-up,
    .scroll-buttons button#scroll-down {
        font-size: 15px !important;
    }
}


/* ==================== Interactive Sub-Navigation & Filter Pills ==================== */
.category-subnav {
    background: var(--bg-card, #1e293b);
    border: 1px solid var(--border-color, #334155);
    border-radius: 12px;
    padding: 16px 20px;
    margin: 20px 0 25px 0;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}
.subnav-group {
    margin-bottom: 12px;
}
.subnav-group:last-child {
    margin-bottom: 0;
}
.subnav-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary, #f8fafc);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.subnav-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.subnav-pill {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-secondary, #94a3b8);
    border: 1px solid var(--border-color, #334155);
    border-radius: 20px;
    font-size: 0.88rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
}
.subnav-pill:hover {
    background: rgba(99, 102, 241, 0.15);
    color: #818cf8;
    border-color: #6366f1;
    transform: translateY(-1px);
}
.subnav-pill.active {
    background: #6366f1 !important;
    color: #ffffff !important;
    border-color: #4f46e5 !important;
    font-weight: 700;
    box-shadow: 0 2px 10px rgba(99, 102, 241, 0.4);
}

/* ==================== Top Navigation Dropdowns ==================== */
.portal-nav-links {
    position: relative;
}
.nav-dropdown {
    position: relative;
    display: inline-block;
}
.nav-dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: #1e293b;
    min-width: 220px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.5);
    border: 1px solid #334155;
    border-radius: 8px;
    padding: 8px 0;
    z-index: 1000;
    margin-top: 4px;
}
.nav-dropdown:hover .nav-dropdown-content,
.nav-dropdown:focus-within .nav-dropdown-content {
    display: block;
}
.nav-dropdown-content a {
    color: #cbd5e1;
    padding: 8px 16px;
    text-decoration: none;
    display: block;
    font-size: 0.88rem;
    transition: background 0.15s ease, color 0.15s ease;
}
.nav-dropdown-content a:hover {
    background: #334155;
    color: #ffffff;
}



/* ==================== Solid High-Visibility Share & Floating Buttons ==================== */
.share-buttons-container {
    display: flex !important;
    align-items: center !important;
    gap: 8px !important;
    flex-wrap: wrap !important;
    margin: 8px 0 !important;
}
.share-btn {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 6px !important;
    padding: 8px 16px !important;
    border-radius: 20px !important;
    font-size: 13px !important;
    font-weight: 700 !important;
    color: #ffffff !important;
    text-decoration: none !important;
    border: none !important;
    cursor: pointer !important;
    transition: transform 0.2s ease, filter 0.2s ease !important;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2) !important;
}
.share-btn:hover {
    transform: translateY(-2px) scale(1.04) !important;
    filter: brightness(1.15) !important;
}
.share-btn.share-wa, .share-wa {
    background: #25D366 !important;
    color: #ffffff !important;
}
.share-btn.share-vk, .share-vk {
    background: #4C75A3 !important;
    color: #ffffff !important;
}
.share-btn.share-tg, .share-tg {
    background: #0088cc !important;
    color: #ffffff !important;
}
.share-btn.share-copy, .share-copy {
    background: linear-gradient(135deg, #6366f1, #8b5cf6) !important;
    color: #ffffff !important;
}

/* Vertical Floating Action Panel */
.scroll-buttons {
    position: fixed !important;
    right: 8px !important;
    top: 50% !important;
    transform: translateY(-50%) !important;
    display: flex !important;
    flex-direction: column !important;
    flex-wrap: nowrap !important;
    gap: 6px !important;
    z-index: 9999999 !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
}
.scroll-buttons .float-group {
    display: flex !important;
    flex-direction: column !important;
    gap: 4px !important;
    background: rgba(15, 23, 42, 0.95) !important;
    backdrop-filter: blur(8px) !important;
    padding: 4px !important;
    border-radius: 10px !important;
    border: 1px solid rgba(99, 102, 241, 0.3) !important;
    box-shadow: 0 6px 20px rgba(0,0,0,0.6) !important;
}
.scroll-buttons button,
.scroll-buttons a.nav-shortcut-btn,
.scroll-buttons a.float-share-btn,
.scroll-buttons button.float-share-btn {
    width: 36px !important;
    height: 36px !important;
    border-radius: 8px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    font-weight: 800 !important;
    font-size: 12px !important;
    border: none !important;
    cursor: pointer !important;
    color: #ffffff !important;
    text-decoration: none !important;
    transition: transform 0.2s ease, filter 0.2s ease !important;
    box-sizing: border-box !important;
    box-shadow: 0 2px 6px rgba(0,0,0,0.3) !important;
}
.scroll-buttons button:hover,
.scroll-buttons a.nav-shortcut-btn:hover,
.scroll-buttons a.float-share-btn:hover,
.scroll-buttons button.float-share-btn:hover {
    transform: scale(1.12) !important;
    filter: brightness(1.2) !important;
}
.scroll-buttons .float-menu-btn { background: #0284c7 !important; font-size: 16px !important; }
.scroll-buttons .float-search-btn { background: #6366f1 !important; font-size: 14px !important; }
.scroll-buttons .float-oge { background: #f59e0b !important; }
.scroll-buttons .float-ege { background: #ef4444 !important; }
.scroll-buttons .float-vpr { background: #10b981 !important; }
.scroll-buttons .float-wa { background: #25D366 !important; }
.scroll-buttons .float-vk { background: #4C75A3 !important; }
.scroll-buttons .float-tg { background: #0088cc !important; }
.scroll-buttons .float-copy { background: linear-gradient(135deg, #6366f1, #8b5cf6) !important; font-size: 15px !important; }
.scroll-buttons button#scroll-up,
.scroll-buttons button#scroll-down { background: #334155 !important; font-size: 14px !important; }

@media (max-width: 640px) {
    .scroll-buttons {
        right: 4px !important;
        gap: 4px !important;
    }
    .scroll-buttons button,
    .scroll-buttons a.nav-shortcut-btn,
    .scroll-buttons a.float-share-btn,
    .scroll-buttons button.float-share-btn {
        width: 32px !important;
        height: 30px !important;
        font-size: 11px !important;
    }
}



/* ==================== 2-COLUMN COMPACT VARIANTS GRID (PC & MOBILE) ==================== */
.variants-grid, .similar-grid,
body.layout-list-preferred .variants-grid,
body.layout-list-preferred .similar-grid {
    display: grid !important;
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 10px !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-right: 36px !important; /* Space for right floating bar */
}

@media (max-width: 640px) {
    .variants-grid, .similar-grid,
    body.layout-list-preferred .variants-grid,
    body.layout-list-preferred .similar-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 6px !important;
        padding-right: 32px !important;
    }
    .variant-card, .similar-card {
        padding: 8px 10px !important;
        gap: 6px !important;
        border-radius: 8px !important;
    }
    .variant-card h3, .similar-card h3 {
        font-size: 12.5px !important;
        line-height: 1.3 !important;
    }
    .variant-card .card-badges span {
        font-size: 9px !important;
        padding: 2px 5px !important;
    }
}

/* ==================== COMPACT SQUARE HORIZONTAL ACTION BUTTONS ==================== */
.viewer-actions-row {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    flex-wrap: wrap !important;
    gap: 8px !important;
    background-color: var(--bg-card, #1e293b) !important;
    padding: 10px 14px !important;
    border-radius: 10px !important;
    border: 1px solid var(--border-color, #334155) !important;
    margin-bottom: 12px !important;
}

.sq-actions-group {
    display: flex !important;
    align-items: center !important;
    gap: 6px !important;
}

.sq-act-btn {
    width: 36px !important;
    height: 36px !important;
    border-radius: 8px !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    border: none !important;
    cursor: pointer !important;
    color: #ffffff !important;
    text-decoration: none !important;
    transition: transform 0.2s ease, filter 0.2s ease !important;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2) !important;
}
.sq-act-btn:hover {
    transform: translateY(-2px) scale(1.06) !important;
    filter: brightness(1.18) !important;
}
.sq-act-wa { background: #25D366 !important; }
.sq-act-vk { background: #4C75A3 !important; }
.sq-act-tg { background: #0088cc !important; }
.sq-act-copy { background: linear-gradient(135deg, #6366f1, #8b5cf6) !important; }

/* ==================== GREEN PROMINENT POST-IFRAME DOWNLOAD CTA ==================== */
.download-cta-wrapper {
    text-align: center !important;
    margin: 18px auto 14px auto !important;
    width: 100% !important;
}
.btn-download-prominent {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 10px !important;
    background: linear-gradient(135deg, #10b981, #059669) !important;
    color: #ffffff !important;
    font-size: 15.5px !important;
    font-weight: 800 !important;
    padding: 13px 30px !important;
    border-radius: 12px !important;
    text-decoration: none !important;
    box-shadow: 0 4px 18px rgba(16, 185, 129, 0.45) !important;
    transition: transform 0.2s ease, filter 0.2s ease, box-shadow 0.2s ease !important;
    max-width: 480px !important;
    width: 90% !important;
    box-sizing: border-box !important;
}
.btn-download-prominent:hover {
    transform: translateY(-2px) scale(1.03) !important;
    filter: brightness(1.12) !important;
    box-shadow: 0 6px 24px rgba(16, 185, 129, 0.6) !important;
}

/* ==================== VERTICAL FLOATING ACTION PANEL (HIGHER & COMPACT) ==================== */
.scroll-buttons {
    position: fixed !important;
    right: 6px !important;
    top: 32% !important;
    transform: translateY(-32%) !important;
    display: flex !important;
    flex-direction: column !important;
    flex-wrap: nowrap !important;
    gap: 4px !important;
    z-index: 9999999 !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
}
.scroll-buttons .float-group {
    display: flex !important;
    flex-direction: column !important;
    gap: 3px !important;
    background: rgba(15, 23, 42, 0.95) !important;
    backdrop-filter: blur(8px) !important;
    padding: 3px !important;
    border-radius: 8px !important;
    border: 1px solid rgba(99, 102, 241, 0.3) !important;
    box-shadow: 0 4px 14px rgba(0,0,0,0.5) !important;
}
.scroll-buttons button,
.scroll-buttons a.nav-shortcut-btn,
.scroll-buttons a.float-share-btn,
.scroll-buttons button.float-share-btn {
    width: 28px !important;
    height: 28px !important;
    border-radius: 6px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    font-weight: 800 !important;
    font-size: 10.5px !important;
    border: none !important;
    cursor: pointer !important;
    color: #ffffff !important;
    text-decoration: none !important;
    transition: transform 0.2s ease, filter 0.2s ease !important;
    box-sizing: border-box !important;
}
.scroll-buttons button:hover,
.scroll-buttons a.nav-shortcut-btn:hover,
.scroll-buttons a.float-share-btn:hover,
.scroll-buttons button.float-share-btn:hover {
    transform: scale(1.15) !important;
    filter: brightness(1.2) !important;
}
.scroll-buttons .float-menu-btn { background: #0284c7 !important; font-size: 14px !important; }
.scroll-buttons .float-search-btn { background: #6366f1 !important; font-size: 12px !important; }
.scroll-buttons .float-oge { background: #f59e0b !important; }
.scroll-buttons .float-ege { background: #ef4444 !important; }
.scroll-buttons .float-vpr { background: #10b981 !important; }
.scroll-buttons .float-wa { background: #25D366 !important; }
.scroll-buttons .float-vk { background: #4C75A3 !important; }
.scroll-buttons .float-tg { background: #0088cc !important; }
.scroll-buttons .float-copy { background: linear-gradient(135deg, #6366f1, #8b5cf6) !important; font-size: 13px !important; }
.scroll-buttons button#scroll-up,
.scroll-buttons button#scroll-down { background: #334155 !important; font-size: 12px !important; }

@media (max-width: 640px) {
    .scroll-buttons {
        right: 3px !important;
        top: 28% !important;
        transform: translateY(-28%) !important;
        gap: 3px !important;
    }
    .scroll-buttons button,
    .scroll-buttons a.nav-shortcut-btn,
    .scroll-buttons a.float-share-btn,
    .scroll-buttons button.float-share-btn {
        width: 25px !important;
        height: 25px !important;
        font-size: 9px !important;
    }
}



/* ==================== CENTERED HORIZONTAL ACTION / SHARE BUTTONS ==================== */
.viewer-actions-row {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 8px !important;
    background-color: var(--bg-card, #1e293b) !important;
    padding: 10px 16px !important;
    border-radius: 10px !important;
    border: 1px solid var(--border-color, #334155) !important;
    margin: 12px auto !important;
    text-align: center !important;
    width: 100% !important;
    box-sizing: border-box !important;
}

.sq-actions-group {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 10px !important;
    margin: 0 auto !important;
    width: 100% !important;
}

.share-buttons-container,
.pdf-viewer-header > div:last-child {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    margin: 0 auto !important;
}



/* ==================== CLEAN COMPACT VARIANTS LIST (DESKTOP 2-COL, MOBILE 1-COL) ==================== */
/* Hide the 3 badges on the left in variant lists */
.variants-grid .card-badges,
.similar-grid .card-badges,
.variants-grid .variant-meta,
.similar-grid .variant-meta,
.variants-grid .variant-brief,
.similar-grid .variant-brief {
    display: none !important;
}

/* Desktop: 2 compact columns */
.variants-grid, .similar-grid,
body.layout-list-preferred .variants-grid,
body.layout-list-preferred .similar-grid {
    display: grid !important;
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 8px !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-right: 36px !important;
    margin: 10px 0 !important;
}

.variant-card-link {
    text-decoration: none !important;
    display: block !important;
    width: 100% !important;
}

.variant-card, .similar-card {
    display: flex !important;
    align-items: center !important;
    justify-content: flex-start !important;
    padding: 10px 14px !important;
    margin: 0 !important;
    height: auto !important;
    min-height: unset !important;
    background: var(--bg-card, #1e293b) !important;
    border: 1px solid var(--border-color, #334155) !important;
    border-radius: 8px !important;
    transition: transform 0.15s ease, border-color 0.15s ease, background-color 0.15s ease !important;
    box-sizing: border-box !important;
}

.variant-card h3, .similar-card h3 {
    margin: 0 !important;
    padding: 0 !important;
    font-size: 14px !important;
    font-weight: 600 !important;
    color: var(--text-primary, #f8fafc) !important;
    text-align: left !important;
    line-height: 1.4 !important;
    width: 100% !important;
}

.variant-card:hover, .similar-card:hover {
    transform: translateX(4px) !important;
    background-color: var(--hover-bg, #334155) !important;
    border-color: var(--primary-color, #6366f1) !important;
}

/* Mobile: Single compact column (1 variant per line) without empty space */
@media (max-width: 768px) {
    .variants-grid, .similar-grid,
    body.layout-list-preferred .variants-grid,
    body.layout-list-preferred .similar-grid {
        grid-template-columns: 1fr !important;
        gap: 6px !important;
        padding-right: 32px !important;
        margin: 8px 0 !important;
    }
    .variant-card, .similar-card {
        padding: 9px 12px !important;
        border-radius: 7px !important;
    }
    .variant-card h3, .similar-card h3 {
        font-size: 13.5px !important;
        line-height: 1.35 !important;
    }
}

/* ==================== MOBILE DROPDOWN ACCORDION / TOUCH FIX ==================== */
@media (max-width: 768px) {
    .portal-nav-bar {
        flex-direction: column !important;
        align-items: stretch !important;
    }
    .main-sections-group {
        display: flex !important;
        flex-direction: column !important;
        gap: 4px !important;
        width: 100% !important;
    }
    .nav-dropdown {
        width: 100% !important;
        position: static !important;
    }
    .nav-dropdown > a {
        display: flex !important;
        align-items: center !important;
        justify-content: space-between !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }
    .nav-dropdown-content {
        display: none !important;
        position: static !important;
        width: 100% !important;
        box-shadow: none !important;
        background: #0f172a !important;
        border: 1px solid #334155 !important;
        border-radius: 8px !important;
        margin: 4px 0 6px 0 !important;
        padding: 4px 0 !important;
    }
    .nav-dropdown.active-dropdown .nav-dropdown-content,
    .nav-dropdown.open .nav-dropdown-content {
        display: block !important;
    }
    .nav-dropdown-content a {
        padding: 9px 16px !important;
        font-size: 14px !important;
        border-bottom: 1px solid #1e293b !important;
    }
}



/* ==================== BULLETPROOF HORIZONTAL & VERTICAL DOCK STYLES ==================== */
.viewer-actions-row {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 8px !important;
    background-color: var(--bg-card, #1e293b) !important;
    padding: 10px 16px !important;
    border-radius: 10px !important;
    border: 1px solid var(--border-color, #334155) !important;
    margin: 12px auto !important;
    text-align: center !important;
    width: 100% !important;
    box-sizing: border-box !important;
}

.sq-actions-group {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 12px !important;
    margin: 0 auto !important;
}

.sq-act-btn {
    width: 40px !important;
    height: 40px !important;
    border-radius: 8px !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    border: none !important;
    cursor: pointer !important;
    color: #ffffff !important;
    text-decoration: none !important;
    transition: transform 0.2s ease, filter 0.2s ease !important;
    box-shadow: 0 2px 8px rgba(0,0,0,0.25) !important;
    box-sizing: border-box !important;
    padding: 0 !important;
    margin: 0 !important;
}
.sq-act-btn:hover {
    transform: translateY(-2px) scale(1.08) !important;
    filter: brightness(1.18) !important;
}
.sq-act-wa { background: #25D366 !important; }
.sq-act-vk { background: #4C75A3 !important; }
.sq-act-tg { background: #0088cc !important; }
.sq-act-copy { background: linear-gradient(135deg, #6366f1, #8b5cf6) !important; }

/* ==================== LARGER VERTICAL FLOATING ACTION DOCK ==================== */
.scroll-buttons, .quick-dock-panel {
    position: fixed !important;
    right: 8px !important;
    top: 30% !important;
    transform: translateY(-30%) !important;
    display: flex !important;
    flex-direction: column !important;
    flex-wrap: nowrap !important;
    gap: 6px !important;
    z-index: 9999999 !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
}

.scroll-buttons .float-group,
.quick-dock-panel .float-group {
    display: flex !important;
    flex-direction: column !important;
    gap: 4px !important;
    background: rgba(15, 23, 42, 0.96) !important;
    backdrop-filter: blur(8px) !important;
    padding: 4px !important;
    border-radius: 9px !important;
    border: 1px solid rgba(99, 102, 241, 0.35) !important;
    box-shadow: 0 4px 16px rgba(0,0,0,0.55) !important;
}

.scroll-buttons button,
.scroll-buttons a.nav-shortcut-btn,
.quick-dock-panel button,
.quick-dock-panel a.nav-shortcut-btn {
    width: 36px !important;
    height: 36px !important;
    border-radius: 7px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    font-weight: 800 !important;
    font-size: 13px !important;
    border: none !important;
    cursor: pointer !important;
    color: #ffffff !important;
    text-decoration: none !important;
    transition: transform 0.2s ease, filter 0.2s ease !important;
    box-sizing: border-box !important;
    padding: 0 !important;
    margin: 0 !important;
}

.scroll-buttons button:hover,
.scroll-buttons a.nav-shortcut-btn:hover,
.quick-dock-panel button:hover,
.quick-dock-panel a.nav-shortcut-btn:hover {
    transform: scale(1.14) !important;
    filter: brightness(1.2) !important;
}

.scroll-buttons .float-menu-btn { background: #0284c7 !important; font-size: 17px !important; }
.scroll-buttons .float-search-btn { background: #6366f1 !important; font-size: 15px !important; }
.scroll-buttons .float-oge { background: #f59e0b !important; }
.scroll-buttons .float-ege { background: #ef4444 !important; }
.scroll-buttons .float-vpr { background: #10b981 !important; }
.scroll-buttons .float-wa { background: #25D366 !important; }
.scroll-buttons .float-vk { background: #4C75A3 !important; }
.scroll-buttons .float-tg { background: #0088cc !important; }
.scroll-buttons .float-copy { background: linear-gradient(135deg, #6366f1, #8b5cf6) !important; font-size: 16px !important; }
.scroll-buttons button#scroll-up,
.scroll-buttons button#scroll-down { background: #334155 !important; font-size: 15px !important; }

/* Mobile dock sizing */
@media (max-width: 768px) {
    .scroll-buttons, .quick-dock-panel {
        right: 4px !important;
        top: 26% !important;
        transform: translateY(-26%) !important;
        gap: 5px !important;
    }
    .scroll-buttons button,
    .scroll-buttons a.nav-shortcut-btn,
    .quick-dock-panel button,
    .quick-dock-panel a.nav-shortcut-btn {
        width: 34px !important;
        height: 34px !important;
        font-size: 12px !important;
    }
}

/* Dropdown button cursor */
.nav-dropdown .nav-item-btn {
    cursor: pointer !important;
    user-select: none !important;
}



/* ==================== CLEAN DIRECT NAVBAR (NO DROPDOWNS) ==================== */
.portal-nav-bar .main-sections-group {
    display: flex !important;
    align-items: center !important;
    gap: 8px !important;
    flex-wrap: wrap !important;
}

.portal-nav-bar .nav-item-btn {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 8px 16px !important;
    border-radius: 8px !important;
    font-size: 14px !important;
    font-weight: 700 !important;
    color: #ffffff !important;
    text-decoration: none !important;
    transition: transform 0.15s ease, filter 0.15s ease, background 0.15s ease !important;
    border: 1px solid rgba(255,255,255,0.1) !important;
}

.portal-nav-bar .nav-item-btn:hover {
    transform: translateY(-2px) !important;
    filter: brightness(1.15) !important;
}

.portal-nav-bar .nav-oge { background: linear-gradient(135deg, #f59e0b, #d97706) !important; }
.portal-nav-bar .nav-ege { background: linear-gradient(135deg, #ef4444, #dc2626) !important; }
.portal-nav-bar .nav-vpr { background: linear-gradient(135deg, #10b981, #059669) !important; }

/* Clear Russian VK text styling */
.sq-act-vk, .float-vk, .scroll-buttons .float-vk {
    background: #4C75A3 !important;
    color: #ffffff !important;
    font-weight: 900 !important;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif !important;
    letter-spacing: -0.5px !important;
}



/* ==================== ULTRA-COMPACT MOBILE HEADER & NAV BAR ==================== */
.category-subnav, #subnav {
    scroll-margin-top: 60px !important;
}

@media (max-width: 768px) {
    .header {
        padding: 4px 8px !important;
    }
    
    .navbar-top-row {
        gap: 6px !important;
        padding: 2px 0 !important;
    }
    
    .logo-icon {
        width: 28px !important;
        height: 28px !important;
        font-size: 16px !important;
    }
    
    .logo-text-slogan {
        font-size: 10px !important;
        line-height: 1.1 !important;
        max-width: 170px !important;
    }
    
    .search-box {
        max-width: 150px !important;
    }
    
    .search-box-inner {
        height: 30px !important;
        padding: 0 6px !important;
    }
    
    .search-box-inner input {
        font-size: 11px !important;
    }
    
    .search-submit-btn {
        display: none !important;
    }
    
    .square-menu-btn {
        width: 30px !important;
        height: 30px !important;
        font-size: 14px !important;
        padding: 0 !important;
    }

    /* Compact Mobile Navigation Bar */
    .portal-nav-bar {
        padding: 4px 6px !important;
        gap: 4px !important;
        border-radius: 8px !important;
        margin-top: 4px !important;
    }

    .portal-nav-bar .main-sections-group {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: wrap !important;
        gap: 4px !important;
        width: 100% !important;
    }

    .portal-nav-bar .nav-item-btn {
        flex: 1 1 calc(25% - 4px) !important;
        padding: 5px 6px !important;
        font-size: 12px !important;
        font-weight: 700 !important;
        text-align: center !important;
        justify-content: center !important;
        border-radius: 6px !important;
    }

    .portal-nav-divider {
        margin: 3px 0 !important;
        border-color: rgba(255,255,255,0.08) !important;
    }

    .portal-nav-section {
        display: flex !important;
        align-items: center !important;
        gap: 4px !important;
        width: 100% !important;
    }

    .portal-nav-label {
        font-size: 10px !important;
        min-width: 60px !important;
        color: #94a3b8 !important;
    }

    .portal-nav-section .portal-nav-links {
        display: flex !important;
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
        gap: 4px !important;
        padding-bottom: 2px !important;
    }

    .portal-nav-section .portal-nav-links::-webkit-scrollbar {
        height: 2px !important;
    }

    .portal-nav-section .portal-nav-links a {
        padding: 3px 8px !important;
        font-size: 11px !important;
        border-radius: 4px !important;
        white-space: nowrap !important;
        background: #1e293b !important;
        border: 1px solid #334155 !important;
    }
}



/* ==================== SUBNAV HIGHLIGHT & ADVICE BANNER ==================== */
.category-subnav, #subnav {
    background: linear-gradient(145deg, #1e293b, #0f172a) !important;
    border: 2px solid #6366f1 !important;
    border-radius: 12px !important;
    padding: 14px 16px !important;
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.35), 0 8px 25px rgba(0, 0, 0, 0.5) !important;
    margin: 14px 0 !important;
    scroll-margin-top: 60px !important;
    animation: subnavPulse 3s infinite alternate ease-in-out !important;
}

@keyframes subnavPulse {
    0% { border-color: #6366f1; box-shadow: 0 0 15px rgba(99, 102, 241, 0.3); }
    100% { border-color: #38bdf8; box-shadow: 0 0 24px rgba(56, 189, 248, 0.5); }
}

.subnav-tip-banner {
    display: flex !important;
    align-items: center !important;
    gap: 8px !important;
    background: rgba(99, 102, 241, 0.15) !important;
    border: 1px dashed rgba(129, 140, 248, 0.6) !important;
    border-radius: 8px !important;
    padding: 8px 12px !important;
    margin-bottom: 12px !important;
    color: #e0e7ff !important;
    font-size: 13.5px !important;
    line-height: 1.4 !important;
}

.subnav-tip-icon {
    font-size: 18px !important;
    flex-shrink: 0 !important;
}

.subnav-title {
    font-size: 14.5px !important;
    font-weight: 800 !important;
    color: #38bdf8 !important;
    margin-bottom: 8px !important;
    display: flex !important;
    align-items: center !important;
    gap: 6px !important;
}

.subnav-pills {
    display: flex !important;
    flex-wrap: wrap !important;
    gap: 7px !important;
}

.subnav-pill {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 7px 14px !important;
    border-radius: 20px !important;
    font-size: 13px !important;
    font-weight: 600 !important;
    color: #cbd5e1 !important;
    background: #334155 !important;
    border: 1px solid rgba(255,255,255,0.12) !important;
    text-decoration: none !important;
    transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease !important;
}

.subnav-pill:hover {
    transform: translateY(-2px) !important;
    background: #475569 !important;
    color: #ffffff !important;
}

.subnav-pill.active {
    background: linear-gradient(135deg, #6366f1, #8b5cf6) !important;
    color: #ffffff !important;
    font-weight: 800 !important;
    border-color: #a5b4fc !important;
    box-shadow: 0 3px 12px rgba(99, 102, 241, 0.55) !important;
}

/* ==================== OPTIMIZED MOBILE NAVBAR SIZING ==================== */
@media (max-width: 768px) {
    .header {
        padding: 6px 10px !important;
    }
    
    .navbar-top-row {
        gap: 8px !important;
        padding: 2px 0 !important;
    }
    
    .portal-nav-bar {
        padding: 6px 8px !important;
        gap: 6px !important;
        border-radius: 8px !important;
        margin-top: 4px !important;
    }

    .portal-nav-bar .main-sections-group {
        display: grid !important;
        grid-template-columns: repeat(4, 1fr) !important;
        gap: 6px !important;
        width: 100% !important;
    }

    .portal-nav-bar .nav-item-btn {
        padding: 8px 4px !important;
        font-size: 13px !important;
        font-weight: 800 !important;
        text-align: center !important;
        justify-content: center !important;
        border-radius: 7px !important;
        width: 100% !important;
        box-sizing: border-box !important;
        min-height: 36px !important;
        display: flex !important;
        align-items: center !important;
    }

    .portal-nav-section {
        display: flex !important;
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: 5px !important;
        width: 100% !important;
    }

    .portal-nav-label {
        font-size: 11.5px !important;
        font-weight: 700 !important;
        color: #94a3b8 !important;
    }

    .portal-nav-section .portal-nav-links {
        display: flex !important;
        flex-wrap: wrap !important;
        gap: 5px !important;
        width: 100% !important;
    }

    .portal-nav-section .portal-nav-links a {
        padding: 5px 10px !important;
        font-size: 12px !important;
        font-weight: 600 !important;
        border-radius: 6px !important;
        background: #1e293b !important;
        border: 1px solid #334155 !important;
    }

    .subnav-tip-banner {
        font-size: 12px !important;
        padding: 6px 10px !important;
    }

    .subnav-pill {
        padding: 6px 11px !important;
        font-size: 12px !important;
    }
}