/* ============================================
   MassComm - BBC World Style
   ============================================ */

* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --bbc-red: #BB1919;
    --bbc-dark: #222222;
    --bbc-black: #1a1a1a;
    --bbc-white: #ffffff;
    --bbc-gray: #6e6e6e;
    --bbc-light-gray: #f2f2f2;
    --bbc-border: #d5d5d5;
    --bbc-hover: #e8e8e8;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, Helvetica, Arial, sans-serif;
    color: var(--bbc-dark);
    background: var(--bbc-white);
    line-height: 1.5;
}

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

/* Header */
.header {
    background: var(--bbc-dark);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
}

.header-left { display: flex; align-items: center; }

.logo {
    font-family: 'Source Serif 4', 'Playfair Display', serif;
    font-size: 26px;
    font-weight: 900;
    color: var(--bbc-white);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.logo span { color: var(--bbc-red); font-size: 22px; }

.nav { display: flex; align-items: center; gap: 0; margin-left: 30px; flex: 1; }

.nav-links { display: flex; align-items: center; gap: 0; }

.nav-link {
    text-decoration: none;
    color: rgba(255,255,255,0.7);
    font-size: 14px;
    font-weight: 700;
    padding: 18px 16px;
    border-bottom: 3px solid transparent;
    transition: color 0.15s, border-color 0.15s;
}

.nav-link:hover { color: var(--bbc-white); }

.nav-link.active {
    color: var(--bbc-white);
    border-bottom-color: var(--bbc-red);
}

.header-right { display: flex; align-items: center; gap: 10px; margin-left: auto; }

.admin-login-btn {
    background: none;
    border: 1px solid rgba(255,255,255,0.3);
    color: rgba(255,255,255,0.8);
    padding: 7px 14px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.15s;
}

.admin-login-btn:hover {
    background: var(--bbc-red);
    border-color: var(--bbc-red);
    color: var(--bbc-white);
}

.login-btn {
    background: var(--bbc-red);
    border: none;
    color: var(--bbc-white);
    padding: 8px 18px;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.15s;
}

.login-btn:hover { background: #9c1414; }

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-info span {
    font-size: 13px;
    font-weight: 600;
    color: var(--bbc-white);
}

.logout-btn {
    background: none;
    border: 1px solid rgba(255,255,255,0.3);
    color: rgba(255,255,255,0.7);
    padding: 6px 12px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
}

.logout-btn:hover {
    border-color: var(--bbc-red);
    color: var(--bbc-red);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    flex-direction: column;
    gap: 4px;
}

.menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--bbc-white);
}

/* Hero */
.hero {
    background: var(--bbc-black);
    padding: 50px 0 55px;
    border-bottom: 4px solid var(--bbc-red);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.hero-content { max-width: 100%; }

.hero-tag {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--bbc-red);
    margin-bottom: 14px;
    text-transform: uppercase;
}

.hero h1 {
    font-family: 'Source Serif 4', 'Playfair Display', serif;
    font-size: 42px;
    font-weight: 900;
    color: var(--bbc-white);
    line-height: 1.1;
    margin-bottom: 14px;
}

.hero-desc {
    font-size: 15px;
    color: rgba(255,255,255,0.6);
    line-height: 1.6;
    margin-bottom: 24px;
    max-width: 480px;
}

.search-btn {
    padding: 12px 18px;
    background: var(--bbc-red);
    color: var(--bbc-white);
    border: none;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1px;
    cursor: pointer;
    transition: background 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hero-visual {
    display: flex;
    justify-content: center;
}

.hero-card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    max-width: 340px;
}

.hero-card {
    padding: 18px 10px;
    text-align: center;
    border-radius: 10px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.hero-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
}

.hc-red { background: var(--bbc-red); }
.hc-dark { background: #2a2a2a; border: 1px solid #444; }
.hc-gray { background: #333; border: 1px solid #555; }

.hc-icon {
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hc-label {
    font-size: 10px;
    font-weight: 700;
    color: rgba(255,255,255,0.9);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* About Section */
.about-section {
    padding: 50px 0;
    background: var(--bbc-white);
    border-bottom: 1px solid var(--bbc-border);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 50px;
    align-items: start;
}

.about-content p {
    font-size: 15px;
    color: #444;
    line-height: 1.7;
    margin-bottom: 14px;
}

.about-content strong {
    color: var(--bbc-dark);
}

.about-features {
    display: grid;
    gap: 16px;
}

.about-feature {
    padding: 20px;
    border: 1px solid var(--bbc-border);
    border-left: 4px solid var(--bbc-red);
    background: #fafafa;
}

.about-feature h3 {
    font-family: 'Source Serif 4', serif;
    font-size: 16px;
    font-weight: 700;
    color: var(--bbc-dark);
    margin-bottom: 4px;
}

.about-feature p {
    font-size: 13px;
    color: var(--bbc-gray);
    line-height: 1.5;
    margin: 0;
}

.af-icon {
    font-size: 24px;
    margin-bottom: 8px;
}

.search-box {
    display: flex;
    max-width: 480px;
}

.search-box input {
    flex: 1;
    padding: 12px 16px;
    border: none;
    font-size: 14px;
    font-family: 'Inter', sans-serif;
    outline: none;
}

.search-btn {
    padding: 12px 24px;
    background: var(--bbc-red);
    color: var(--bbc-white);
    border: none;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1px;
    cursor: pointer;
    transition: background 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
}

#searchSuggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    border: 1px solid var(--bbc-border);
    border-top: none;
    max-height: 400px;
    overflow-y: auto;
    z-index: 1000;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.search-suggestion-group {
    padding: 8px 0;
    border-bottom: 1px solid #f0f0f0;
}

.search-suggestion-group:last-child {
    border-bottom: none;
}

.search-suggestion-label {
    padding: 4px 16px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #BB1919;
    background: #fafafa;
}

.search-suggestion-item {
    padding: 10px 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: background 0.1s;
    text-decoration: none;
    color: inherit;
}

.search-suggestion-item:hover {
    background: #f8f8f8;
}

.search-suggestion-item .sug-icon {
    font-size: 18px;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f0f0f0;
    border-radius: 6px;
    flex-shrink: 0;
}

.search-suggestion-item .sug-info h4 {
    font-size: 13px;
    font-weight: 600;
    margin: 0 0 2px 0;
    color: var(--bbc-dark);
}

.search-suggestion-item .sug-info p {
    font-size: 11px;
    color: #888;
    margin: 0;
}

.search-no-results {
    padding: 20px 16px;
    text-align: center;
    color: #888;
    font-size: 13px;
}

.search-btn:hover { background: #9c1414; }

/* Blog */
.blog-list-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.blog-post-card {
    background: var(--bbc-white);
    border: 1px solid var(--bbc-border);
    border-radius: 8px;
    padding: 20px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.blog-post-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
    border-color: var(--bbc-red);
}

.blog-post-card h3 {
    font-size: 17px;
    font-weight: 800;
    color: var(--bbc-dark);
    margin-bottom: 6px;
}

.blog-post-date {
    display: block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--bbc-red);
    text-transform: uppercase;
    margin-bottom: 10px;
}

.blog-post-card p {
    font-size: 13px;
    color: var(--bbc-gray);
    line-height: 1.6;
}

.blog-empty {
    padding: 40px 0;
    text-align: center;
    color: var(--bbc-gray);
    font-size: 14px;
}

.blog-editor {
    max-width: 780px;
}

.blog-editor .form-group { margin-bottom: 18px; }

.blog-editor-hint {
    font-size: 12px;
    color: var(--bbc-gray);
    margin: -4px 0 8px;
}

#blogContentInput {
    width: 100%;
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    line-height: 1.7;
    padding: 14px;
    border: 1px solid var(--bbc-border);
    border-radius: 6px;
    resize: vertical;
    min-height: 320px;
}

#blogContentInput:focus, #blogTitleInput:focus { outline: none; border-color: var(--bbc-red); }

.blog-editor-actions { display: flex; gap: 10px; }

.blog-post {
    max-width: 780px;
    margin: 0 auto;
}

.blog-post-title {
    font-family: 'Playfair Display', serif;
    font-size: 30px;
    font-weight: 800;
    color: var(--bbc-dark);
    margin-bottom: 8px;
    line-height: 1.2;
}

.blog-post-meta {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--bbc-red);
    text-transform: uppercase;
    margin-bottom: 24px;
    display: block;
}

.blog-post-body {
    font-family: 'Source Serif 4', serif;
    font-size: 16px;
    line-height: 1.85;
    color: #333;
    white-space: pre-wrap;
    word-wrap: break-word;
}

#blogReadAdminActions { display: flex; }

/* Stats */
.stats {
    background: var(--bbc-dark);
    border-top: 1px solid var(--bbc-border);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    text-align: center;
}

.stat-item {
    padding: 28px 16px;
    position: relative;
}

.stat-item::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 40%;
    background: rgba(255,255,255,0.15);
}

.stat-item:last-child::after { display: none; }

.stat-number {
    display: block;
    font-family: 'Source Serif 4', 'Playfair Display', serif;
    font-size: 36px;
    font-weight: 900;
    color: var(--bbc-white);
    line-height: 1.1;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 2px;
    color: rgba(255,255,255,0.5);
    text-transform: uppercase;
}

/* Categories */
.categories-section {
    padding: 50px 0 60px;
    border-bottom: 1px solid var(--bbc-border);
    background: var(--bbc-white);
}

.section-title {
    font-family: 'Source Serif 4', 'Playfair Display', serif;
    font-size: 26px;
    font-weight: 900;
    margin-bottom: 30px;
    color: var(--bbc-dark);
    padding-bottom: 12px;
    border-bottom: 3px solid var(--bbc-red);
    display: inline-block;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.category-card {
    border: 1px solid var(--bbc-border);
    padding: 24px 20px;
    cursor: pointer;
    transition: background 0.15s;
    background: var(--bbc-white);
}

.category-card:hover { background: var(--bbc-light-gray); }

.admin-add-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-style: dashed;
    color: var(--bbc-gray);
}

.admin-add-card:hover { color: var(--bbc-red); border-color: var(--bbc-red); }

.category-admin-btns {
    display: flex;
    gap: 6px;
    margin-top: 10px;
}

.cat-admin-btn {
    padding: 4px 10px;
    font-size: 10px;
    font-weight: 700;
    border: 1px solid var(--bbc-border);
    background: none;
    cursor: pointer;
    transition: all 0.15s;
}

.cat-admin-btn:hover { border-color: var(--bbc-dark); }

.cat-admin-btn.cat-delete {
    color: var(--bbc-red);
    border-color: var(--bbc-red);
}

.cat-admin-btn.cat-delete:hover {
    background: var(--bbc-red);
    color: var(--bbc-white);
}

.category-card-number {
    font-size: 13px;
    font-weight: 700;
    color: var(--bbc-red);
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.category-card-title {
    font-family: 'Source Serif 4', 'Playfair Display', serif;
    font-size: 19px;
    font-weight: 700;
    color: var(--bbc-dark);
    margin-bottom: 8px;
    line-height: 1.3;
}

.category-card-count {
    font-size: 13px;
    color: var(--bbc-gray);
}

/* View Sections */
.view-section {
    padding: 40px 0;
    min-height: 50vh;
}

.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 12px;
    border-bottom: 3px solid var(--bbc-dark);
}

.view-header h2 {
    font-family: 'Source Serif 4', 'Playfair Display', serif;
    font-size: 24px;
    font-weight: 900;
    color: var(--bbc-dark);
}

.view-actions { display: flex; gap: 10px; align-items: center; }

.upload-btn {
    padding: 9px 18px;
    background: var(--bbc-red);
    color: var(--bbc-white);
    border: none;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: background 0.15s;
}

.upload-btn:hover { background: #9c1414; }

.write-essay-btn,
.blog-manage-btn {
    padding: 9px 18px;
    background: var(--bbc-red);
    color: var(--bbc-white);
    border: none;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: background 0.15s;
}

.write-essay-btn:hover,
.blog-manage-btn:hover { background: #9c1414; }

.back-btn {
    padding: 9px 18px;
    background: none;
    border: 1px solid var(--bbc-border);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all 0.15s;
    color: var(--bbc-dark);
}

.back-btn:hover { border-color: var(--bbc-dark); }

.csspms-intro {
    padding: 16px 20px;
    margin-bottom: 24px;
    border-left: 3px solid var(--bbc-red);
    font-size: 14px;
    color: var(--bbc-gray);
    background: var(--bbc-light-gray);
}

/* Subject Grid */
.subjects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.subject-card {
    border: 1px solid var(--bbc-border);
    padding: 22px 20px;
    transition: background 0.15s;
    background: var(--bbc-white);
}

.subject-card:hover { background: var(--bbc-light-gray); }

.subject-category {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--bbc-red);
    text-transform: uppercase;
    margin-bottom: 8px;
    background: rgba(187, 25, 25, 0.08);
    padding: 3px 8px;
    border-radius: 3px;
    display: inline-block;
}

.subject-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--bbc-dark);
    margin-bottom: 12px;
    line-height: 1.35;
}

.notes-badge {
    display: inline-block;
    font-size: 12px;
    color: var(--bbc-gray);
    margin-bottom: 14px;
}

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

.action-btn {
    padding: 8px 14px;
    font-size: 11px;
    font-weight: 700;
    border: 1px solid var(--bbc-border);
    background: none;
    color: var(--bbc-dark);
    cursor: pointer;
    transition: all 0.15s;
}

.action-btn:hover { border-color: var(--bbc-dark); }

.action-btn.primary {
    background: var(--bbc-dark);
    color: var(--bbc-white);
    border-color: var(--bbc-dark);
}

.action-btn.primary:hover {
    background: var(--bbc-red);
    border-color: var(--bbc-red);
}

/* Notes Viewer (Inline) */
.notes-viewer {
    padding: 40px 0 60px;
    min-height: 60vh;
}

.viewer-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 24px;
}

.viewer-header h2 {
    font-family: 'Source Serif 4', 'Playfair Display', serif;
    font-size: 20px;
    font-weight: 900;
}

.viewer-content {
    background: var(--bbc-light-gray);
    border: 1px solid var(--bbc-border);
    min-height: 300px;
    overflow: visible;
}

.viewer-content iframe {
    width: 100%;
    height: 600px;
    border: none;
}

.viewer-content .download-section {
    padding: 20px;
    text-align: center;
    border-top: 1px solid var(--bbc-border);
}

.download-btn {
    display: inline-block;
    padding: 11px 32px;
    background: var(--bbc-red);
    color: var(--bbc-white);
    border: none;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.5px;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s;
}

.download-btn:hover { background: #9c1414; }

/* Paper Card */
.paper-card {
    border: 1px solid var(--bbc-border);
    padding: 18px 22px;
    margin-bottom: 1px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.15s;
}

.paper-card:hover { background: var(--bbc-light-gray); }

.paper-info h3 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 3px;
    color: var(--bbc-dark);
}

.paper-info p {
    font-size: 12px;
    color: var(--bbc-gray);
}

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

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    z-index: 1000;
    overflow-y: auto;
    padding: 40px 20px;
}

.modal.active {
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.modal-content {
    background: var(--bbc-white);
    max-width: 440px;
    width: 100%;
    padding: 32px;
    position: relative;
    border: 1px solid var(--bbc-border);
    max-height: 90vh;
    overflow-y: auto;
}

.modal-content.auth-modal { max-width: 380px; }

.close-modal {
    position: absolute;
    top: 12px;
    right: 16px;
    font-size: 22px;
    cursor: pointer;
    color: var(--bbc-gray);
    transition: color 0.15s;
}

.close-modal:hover { color: var(--bbc-dark); }

.modal-content h2 {
    font-family: 'Source Serif 4', 'Playfair Display', serif;
    font-size: 22px;
    font-weight: 900;
    margin-bottom: 22px;
    color: var(--bbc-dark);
}

.form-group { margin-bottom: 16px; }

.form-group label {
    display: block;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 6px;
    color: var(--bbc-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--bbc-border);
    font-size: 14px;
    font-family: 'Inter', sans-serif;
    outline: none;
    transition: border-color 0.15s;
    background: var(--bbc-white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--bbc-dark);
}

.file-upload-area {
    border: 1px dashed var(--bbc-border);
    padding: 28px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.15s;
}

.file-upload-area:hover { border-color: var(--bbc-dark); }

.file-upload-area.dragover {
    border-color: var(--bbc-red);
    background: rgba(187,25,25,0.02);
}

.browse-link {
    color: var(--bbc-red);
    text-decoration: underline;
    font-weight: 600;
}

.file-name {
    margin-top: 8px;
    font-size: 12px;
    color: var(--bbc-gray);
}

.submit-btn {
    width: 100%;
    padding: 13px;
    background: var(--bbc-red);
    color: var(--bbc-white);
    border: none;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: background 0.15s;
}

.submit-btn:hover { background: #9c1414; }

.auth-switch {
    text-align: center;
    margin-top: 16px;
    font-size: 13px;
    color: var(--bbc-gray);
}

.auth-switch a {
    color: var(--bbc-red);
    text-decoration: none;
    font-weight: 600;
}

.admin-note {
    font-size: 13px;
    color: var(--bbc-gray);
    margin-bottom: 18px;
    padding: 12px;
    background: var(--bbc-light-gray);
    text-align: center;
}

/* Footer */
@keyframes spin { to { transform: rotate(360deg); } }

/* Table of Contents */
.toc-container {
    max-width: 800px;
    margin: 0 auto;
}

.toc-header {
    text-align: center;
    padding: 30px 20px;
    border-bottom: 2px solid var(--bbc-border);
    margin-bottom: 10px;
}

.toc-book-icon {
    font-size: 48px;
    margin-bottom: 10px;
}

.toc-title {
    font-family: 'Source Serif 4', serif;
    font-size: 26px;
    font-weight: 900;
    color: var(--bbc-dark);
    margin-bottom: 6px;
}

.toc-desc {
    color: var(--bbc-gray);
    font-size: 14px;
    margin-bottom: 8px;
}

.toc-count {
    color: var(--bbc-red);
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.toc-list {
    border-top: 1px solid var(--bbc-border);
}

.toc-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--bbc-border);
    cursor: pointer;
    transition: background 0.15s;
}

.toc-item:hover {
    background: rgba(187, 25, 25, 0.03);
}

.toc-item-active {
    background: rgba(187, 25, 25, 0.05) !important;
    border-left: 3px solid var(--bbc-red);
}

.toc-item-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.toc-number {
    font-family: 'Source Serif 4', serif;
    font-size: 20px;
    font-weight: 900;
    color: var(--bbc-red);
    min-width: 30px;
    text-align: center;
}

.toc-item-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--bbc-dark);
    margin: 0 0 2px 0;
}

.toc-item-meta {
    font-size: 12px;
    color: var(--bbc-gray);
}

.toc-item-notes-index a {
    color: var(--bbc-red);
    text-decoration: underline;
    font-weight: 600;
}
.toc-item-notes-index a:hover { color: var(--bbc-black); }

.toc-arrow {
    font-size: 22px;
    color: var(--bbc-gray);
    transition: transform 0.2s;
}

.toc-item-active .toc-arrow {
    transform: rotate(90deg);
    color: var(--bbc-red);
}

.toc-item-notes {
    padding: 0 20px 16px 66px;
    background: rgba(0,0,0,0.02);
    border-bottom: 1px solid var(--bbc-border);
}

.toc-note-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    background: var(--bbc-white);
    border: 1px solid var(--bbc-border);
    border-radius: 6px;
    margin-top: 10px;
    gap: 12px;
}

.toc-note-card h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--bbc-dark);
    margin: 0 0 3px 0;
}

.toc-note-card p {
    font-size: 12px;
    color: var(--bbc-gray);
    margin: 0;
}

.toc-note-actions {
    display: flex;
    gap: 6px;
    flex-shrink: 0;
}

.toc-btn {
    padding: 6px 12px;
    font-size: 11px;
    font-weight: 700;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    border: 1px solid var(--bbc-border);
    background: var(--bbc-white);
    color: var(--bbc-dark);
    transition: all 0.15s;
    white-space: nowrap;
}

.toc-btn-read {
    background: var(--bbc-dark);
    color: #fff;
    border-color: var(--bbc-dark);
}

.toc-btn-read:hover { background: #333; }

.toc-btn-download {
    background: var(--bbc-red);
    color: #fff;
    border-color: var(--bbc-red);
}

.toc-btn-download:hover { background: #9c1414; }

.toc-btn-delete {
    color: #ef4444;
    border-color: #ef4444;
}

.toc-btn-delete:hover { background: #ef4444; color: #fff; }

.toc-notes-empty {
    padding: 16px;
    text-align: center;
    color: var(--bbc-gray);
    font-size: 13px;
    font-style: italic;
}

.toc-notes-loading {
    padding: 16px;
    text-align: center;
    color: var(--bbc-gray);
    font-size: 13px;
}

.highlight-selected { background: rgba(255, 235, 59, 0.5); border-radius: 2px; padding: 1px 0; cursor: pointer; }
.highlight-yellow { background: rgba(255, 235, 59, 0.5); }
.highlight-green { background: rgba(76, 175, 80, 0.4); }
.highlight-blue { background: rgba(33, 150, 243, 0.4); }
.highlight-pink { background: rgba(233, 30, 99, 0.4); }
.footer {
    background: var(--bbc-dark);
    color: rgba(255,255,255,0.5);
    padding: 30px 0;
    text-align: center;
}

.footer p {
    font-size: 12px;
}

.footer a {
    color: var(--bbc-red);
    text-decoration: none;
    font-weight: 600;
}

.footer a:hover { text-decoration: underline; }

.footer-links {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255,255,255,0.6);
    font-size: 12px;
    margin: 0 10px;
    cursor: pointer;
}

.footer-links a:hover { color: var(--bbc-red); }

/* Empty State */
.empty-state {
    text-align: center;
    padding: 50px 20px;
    color: var(--bbc-gray);
    border: 1px solid var(--bbc-border);
    background: var(--bbc-white);
}

.empty-state h3 {
    font-family: 'Source Serif 4', 'Playfair Display', serif;
    font-size: 18px;
    margin-bottom: 6px;
    color: var(--bbc-dark);
}

/* CSS/PMS Categories */
.csspms-category-header {
    padding-bottom: 10px;
    margin-bottom: 20px;
    border-bottom: 3px solid var(--bbc-red);
}

.csspms-category-header h3 {
    font-family: 'Source Serif 4', 'Playfair Display', serif;
    font-size: 22px;
    font-weight: 900;
    color: var(--bbc-dark);
}

/* Most Downloaded Section */
.most-downloaded-section {
    padding: 50px 0;
    border-top: 1px solid var(--bbc-border);
    border-bottom: 1px solid var(--bbc-border);
}

.most-downloaded-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.most-downloaded-card {
    border: 1px solid var(--bbc-border);
    padding: 18px;
    display: flex;
    align-items: center;
    gap: 14px;
    transition: border-color 0.15s;
}

.most-downloaded-card:hover { border-color: var(--bbc-dark); }

.md-rank {
    font-family: 'Source Serif 4', 'Playfair Display', serif;
    font-size: 24px;
    font-weight: 900;
    color: var(--bbc-red);
    min-width: 36px;
}

.md-info { flex: 1; }

.md-info h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--bbc-dark);
    margin-bottom: 2px;
    line-height: 1.3;
}

.md-info p {
    font-size: 12px;
    color: var(--bbc-gray);
    margin-bottom: 4px;
}

.md-downloads {
    font-size: 11px;
    color: var(--bbc-red);
    font-weight: 600;
}

.md-download-btn {
    padding: 8px 14px;
    background: var(--bbc-dark);
    color: var(--bbc-white);
    text-decoration: none;
    font-size: 11px;
    font-weight: 700;
    transition: background 0.15s;
    white-space: nowrap;
}

.md-download-btn:hover { background: var(--bbc-red); }

/* Request Notes Section */
.request-section {
    padding: 60px 0;
    background: var(--bbc-light-gray);
}

.request-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.request-info h2 {
    font-family: 'Source Serif 4', 'Playfair Display', serif;
    font-size: 28px;
    font-weight: 900;
    color: var(--bbc-dark);
    margin-bottom: 12px;
}

.request-info p {
    font-size: 15px;
    color: var(--bbc-gray);
    line-height: 1.6;
}

.request-form-wrap {
    background: var(--bbc-white);
    padding: 28px;
    border: 1px solid var(--bbc-border);
}

.request-form-wrap .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 12px;
}

.request-form-wrap input,
.request-form-wrap textarea {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--bbc-border);
    font-size: 14px;
    font-family: 'Inter', sans-serif;
    outline: none;
    margin-bottom: 12px;
    transition: border-color 0.15s;
}

.request-form-wrap input:focus,
.request-form-wrap textarea:focus {
    border-color: var(--bbc-dark);
}

.request-form-wrap .submit-btn {
    width: 100%;
    margin-top: 4px;
}

.request-success {
    display: none;
    text-align: center;
    color: #2e7d32;
    font-size: 13px;
    font-weight: 600;
    margin-top: 12px;
    padding: 10px;
    background: rgba(46, 125, 50, 0.08);
}

/* Past Papers Categories */
.pastpaper-category {
    margin-bottom: 10px;
}

.pastpaper-cat-header {
    padding-bottom: 10px;
    margin-bottom: 16px;
    border-bottom: 3px solid var(--bbc-red);
}

.pastpaper-cat-header h3 {
    font-family: 'Source Serif 4', 'Playfair Display', serif;
    font-size: 20px;
    font-weight: 900;
    color: var(--bbc-dark);
}

/* Responsive */
@media (max-width: 1024px) {
    .categories-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
    .categories-grid { grid-template-columns: repeat(2, 1fr); }
    .subjects-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .menu-toggle { display: flex; }
    .nav {
        display: none;
        position: absolute;
        top: 56px;
        left: 0;
        right: 0;
        background: var(--bbc-dark);
        flex-direction: column;
        align-items: stretch;
        padding: 8px 0 0;
        z-index: 999;
        max-height: calc(100vh - 56px);
        overflow-y: auto;
    }
    .nav.active { display: flex; }
    .nav-links { flex-direction: column; align-items: stretch; }
    .nav-link {
        padding: 14px 20px;
        border-bottom: 1px solid rgba(255,255,255,0.1);
        border-left: 3px solid transparent;
    }
    .nav-link.active {
        border-bottom-color: rgba(255,255,255,0.1);
        border-left-color: var(--bbc-red);
    }
    .header-right {
        margin-left: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
        padding: 16px 20px 20px;
        border-top: 1px solid rgba(255,255,255,0.15);
    }
    .header-right .admin-login-btn,
    .header-right .auth-buttons,
    .header-right .login-btn,
    .header-right .user-info {
        width: 100%;
    }
    .header-right .login-btn,
    .header-right .admin-login-btn { width: 100%; padding: 12px 14px; text-align: center; }
    .header-right .user-info { justify-content: space-between; }
    .header-right #adminDownloadToggle { margin-left: 0; justify-content: center; }
    .hero { padding: 16px 0 18px; }
    .hero-grid { grid-template-columns: 1fr; gap: 0; }
    .hero-visual { display: none; }
    .stats { display: none; }
    .hero h1 { font-size: 22px; margin-bottom: 6px; }
    .hero-tag { font-size: 8px; margin-bottom: 6px; letter-spacing: 1.5px; }
    .hero-desc { font-size: 12px; margin-bottom: 10px; display: none; }
    .hero-content { padding: 0; }
    .search-box { max-width: 100%; }
    .search-box input { font-size: 13px; padding: 9px 12px; }
    .search-btn { padding: 9px 14px; }
    .search-btn svg { width: 16px; height: 16px; }
    .about-grid { grid-template-columns: 1fr; gap: 30px; }
    .about-section { padding: 30px 0; }
    .about-feature { padding: 16px; }
    .categories-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .subjects-grid { grid-template-columns: repeat(2, 1fr); }
    .category-card { padding: 16px 14px; }
    .blog-list-grid { grid-template-columns: 1fr; gap: 12px; }
    .blog-post-title { font-size: 22px; }
    .blog-post-body { font-size: 14.5px; }
    #blogContentInput { min-height: 220px; font-size: 13px; }
    .category-card-number { font-size: 11px; margin-bottom: 6px; }
    .category-card-title { font-size: 15px; margin-bottom: 4px; }
    .category-card-count { font-size: 12px; }
    .section-title { font-size: 20px; margin-bottom: 18px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .stat-item::after { display: none; }
    .view-header { flex-direction: column; gap: 12px; align-items: flex-start; }
    .stats-bar { grid-template-columns: repeat(2, 1fr); }
    .viewer-header { flex-direction: column; align-items: flex-start; gap: 12px; }
    .search-box { flex-direction: row; gap: 0; }
    .most-downloaded-grid { grid-template-columns: 1fr; }
    .request-grid { grid-template-columns: 1fr; gap: 24px; }
    .request-form-wrap .form-row { grid-template-columns: 1fr; }
    .toc-item { padding: 12px 14px; }
    .toc-number { font-size: 15px; min-width: 28px; }
    .toc-item-title { font-size: 14px; }
    .notes-viewer { padding: 16px 0 30px; }
}

@media (max-width: 480px) {
    .hero { padding: 12px 0 14px; }
    .hero h1 { font-size: 18px; }
    .hero-tag { font-size: 7px; }
    .hero-desc { display: none; }
    .categories-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .category-card { padding: 14px 12px; }
    .category-card-title { font-size: 14px; }
    .category-card-count { font-size: 11px; }
    .section-title { font-size: 18px; margin-bottom: 14px; }
    .stat-number { font-size: 28px; }
    .notes-viewer { padding: 12px 0 20px; }
    .viewer-content { min-height: 300px; }
    .viewer-content iframe { height: 400px; }
    .viewer-header { gap: 12px; margin-bottom: 16px; }
    .viewer-header h2 { font-size: 17px; }
    .download-section { padding: 14px; }
    .toc-container { padding: 16px 12px; }
    .toc-header { padding: 16px 14px; }
    .toc-title { font-size: 18px; }
    .toc-item { padding: 12px 14px; }
    .toc-number { font-size: 16px; min-width: 24px; }
    .toc-item-title { font-size: 13px; }
    .toc-item-notes { padding: 0 14px 12px 50px; }
    .toc-note-card { flex-direction: column; align-items: flex-start; }
    .toc-note-actions { width: 100%; }
    .toc-note-actions .toc-btn { flex: 1; text-align: center; }
    .container { padding: 0 12px; }
    .view-section { padding: 20px 0; }
    .view-header h2 { font-size: 20px; }
    .back-btn { font-size: 10px; padding: 7px 12px; }
    .upload-btn { font-size: 10px; padding: 7px 12px; }
    .paper-card { flex-direction: column; align-items: flex-start; gap: 10px; padding: 14px; }
    .most-downloaded-item { flex-direction: column; align-items: flex-start; gap: 8px; }
    .request-info h3 { font-size: 16px; }
    .request-info p { font-size: 12px; }
    .request-form-wrap .form-row { grid-template-columns: 1fr; }
    .search-box { max-width: 100%; }
    .search-box input { font-size: 13px; padding: 10px 12px; }
    .search-btn { padding: 10px 14px; }
    .search-btn svg { width: 16px; height: 16px; }
    .about-grid { grid-template-columns: 1fr; gap: 24px; }
    .about-feature { padding: 14px; }
    .about-feature h3 { font-size: 15px; }
    .about-feature p { font-size: 12px; }
    .about-content p { font-size: 13px; }
    .search-suggestion-item { padding: 10px 12px; gap: 10px; }
    .search-suggestion-item .sug-icon { width: 28px; height: 28px; font-size: 16px; }
    .search-suggestion-item .sug-info h4 { font-size: 12px; }
    .search-suggestion-item .sug-info p { font-size: 10px; }
    .search-suggestion-group { padding: 4px 0; }
    .search-suggestion-label { font-size: 9px; padding: 3px 12px; }
    #readerToolbar { padding: 0 8px !important; }
    #readerToolbar .reader-hide-mobile { display: none !important; }
    #readerToolbar button { width: 32px !important; height: 32px !important; font-size: 14px !important; }
    #readerToolbar span#readerTitle { font-size: 12px !important; margin-left: 8px !important; }
    #readerToolbar span#readerPageInfo { font-size: 11px !important; min-width: 45px !important; }
    #readerToolbar span#readerZoomLevel { font-size: 11px !important; min-width: 32px !important; }
    #readerContainer { padding: 10px !important; }
    .pdf-reader-overlay .reader-sidebar { display: none !important; }
}

/* Quiz System */
.toc-btn-test {
    background: #22c55e;
    color: #fff;
    border-color: #22c55e;
}
.toc-btn-test:hover { background: #16a34a; }

.quiz-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.85);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}
.quiz-box {
    background: var(--bbc-white, #fff);
    border-radius: 12px;
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--bbc-border, #e5e7eb);
}
.quiz-header h2 { font-size: 18px; color: var(--bbc-dark, #222); }
.quiz-close {
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: #888;
    padding: 0 4px;
    line-height: 1;
}
.quiz-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}
.quiz-question { margin-bottom: 20px; }
.quiz-q-text { font-size: 15px; color: var(--bbc-dark, #222); margin-bottom: 10px; line-height: 1.5; }
.quiz-options { display: flex; flex-direction: column; gap: 6px; }
.quiz-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border: 1px solid var(--bbc-border, #e5e7eb);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.15s;
    font-size: 14px;
}
.quiz-option:hover { background: #f1f5f9; border-color: #94a3b8; }
.quiz-option input[type="radio"] { accent-color: var(--bbc-red, #BB1919); width: 16px; height: 16px; }
.quiz-option-text { flex: 1; }
.quiz-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--bbc-border, #e5e7eb);
    text-align: center;
}
.quiz-submit-btn {
    padding: 12px 32px;
    background: var(--bbc-red, #BB1919);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s;
}
.quiz-submit-btn:hover { background: #9c1414; }
.quiz-result { text-align: center; padding: 10px 0; }
.quiz-score-circle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: 4px solid var(--bbc-red, #BB1919);
    font-size: 28px;
    font-weight: 800;
    color: var(--bbc-red, #BB1919);
    margin: 0 auto 12px;
}
.quiz-score-text {
    font-size: 16px;
    font-weight: 600;
    color: var(--bbc-dark, #222);
    margin-bottom: 16px;
}
.quiz-result-breakdown { text-align: left; }

@media (max-width: 640px) {
    .quiz-overlay { padding: 8px; }
    .quiz-box { max-height: 95vh; }
    .quiz-body { padding: 14px; }
    .quiz-header h2 { font-size: 15px; }
    .quiz-option { padding: 8px 10px; font-size: 13px; }
}

/* Category page: optional custom image, per-note rows, topic group headings */
.toc-cat-image {
    display: block;
    width: 100%;
    max-width: 360px;
    max-height: 200px;
    object-fit: cover;
    border-radius: 10px;
    margin: 0 auto 14px;
}

.toc-item-left { flex: 1; min-width: 0; }
.toc-item-info { min-width: 0; }

.toc-group-head {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: var(--bbc-light-gray, #f4f4f4);
    border-bottom: 1px solid var(--bbc-border);
}
.toc-group-title {
    flex: 1;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--bbc-dark);
}
.toc-group-count { font-size: 11px; color: var(--bbc-gray); white-space: nowrap; }
.toc-group-flash { animation: tocGroupFlash 1.8s ease; }
@keyframes tocGroupFlash {
    0%, 60% { background: #fff3b0; }
    100% { background: var(--bbc-light-gray, #f4f4f4); }
}

.toc-note-link { color: inherit; text-decoration: none; }
.toc-item:hover .toc-note-link { color: var(--bbc-red); }
.toc-test-flag { color: #16a34a; font-weight: 600; }

.toc-mini-delete {
    padding: 4px 10px;
    font-size: 10px;
    font-weight: 700;
    border: 1px solid #ef4444;
    background: none;
    color: #ef4444;
    cursor: pointer;
    white-space: nowrap;
}
.toc-mini-delete:hover { background: #ef4444; color: #fff; }

@media (max-width: 600px) {
    .toc-cat-image { max-height: 160px; }
    .toc-item { padding: 14px 12px; }
}

.toc-mini-edit {
    padding: 4px 10px;
    font-size: 10px;
    font-weight: 700;
    border: 1px solid var(--bbc-gray);
    background: none;
    color: var(--bbc-dark);
    cursor: pointer;
    white-space: nowrap;
}
.toc-mini-edit:hover { background: var(--bbc-dark); color: #fff; }