/* ============================================
   THE IVORY INDEX — Premium Academic Stylesheet
   AOAROSE Division | Imperial ECC
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;500;600;700;800;900&family=Cinzel+Decorative:wght@400;700;900&family=EB+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500;1,600&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --bg-deep: #0b0d10;
    --bg-primary: #111318;
    --bg-surface: #181b22;
    --bg-card: #1e222b;
    --bg-card-hover: #252a35;
    --bg-elevated: #2a2f3a;
    --ivory: #f0ead6;
    --ivory-muted: #d4cdb8;
    --parchment: #c8b88a;
    --gold: #c9a84c;
    --gold-bright: #e8c558;
    --gold-dim: #8a7535;
    --text-primary: #e8e4d9;
    --text-secondary: #b0a998;
    --text-muted: #7a7368;
    --crimson: #8b2020;
    --crimson-soft: rgba(139, 32, 32, 0.15);
    --green-muted: #3a6e4f;
    --green-soft: rgba(58, 110, 79, 0.15);
    --border: rgba(201, 168, 76, 0.12);
    --border-strong: rgba(201, 168, 76, 0.25);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.4);
    --shadow-lg: 0 16px 48px rgba(0,0,0,0.5);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --font-display: 'Cinzel', serif;
    --font-decorative: 'Cinzel Decorative', serif;
    --font-body: 'EB Garamond', serif;
    --font-ui: 'Inter', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
    background: var(--bg-deep);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1.1rem;
    line-height: 1.75;
    overflow-x: hidden;
}

::selection { background: var(--gold-dim); color: var(--ivory); }
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: var(--gold-dim); border-radius: 4px; }

/* Noise Overlay */
.noise-overlay {
    position: fixed; inset: 0;
    pointer-events: none; z-index: 9999; opacity: 0.025;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.7' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ===== SIDEBAR ===== */
.sidebar {
    position: fixed; left: 0; top: 0;
    width: 280px; height: 100vh;
    background: var(--bg-primary);
    border-right: 1px solid var(--border);
    display: flex; flex-direction: column;
    z-index: 100; padding: 2rem 1.5rem;
    transition: transform 0.4s ease;
}

.sidebar-brand {
    text-align: center;
    padding-bottom: 1.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.sidebar-brand h2 {
    font-family: var(--font-display);
    color: var(--gold);
    font-size: 1.25rem;
    letter-spacing: 3px;
    margin-bottom: 0.25rem;
}

.sidebar-brand p {
    font-family: var(--font-ui);
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.nav-links {
    list-style: none;
    flex-grow: 1;
    overflow-y: auto;
}

.nav-links li a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 1rem;
    margin-bottom: 0.2rem;
    color: var(--text-muted);
    text-decoration: none;
    font-family: var(--font-ui);
    font-size: 0.82rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    border-left: 3px solid transparent;
    transition: var(--transition);
}

.nav-links li a:hover {
    color: var(--text-primary);
    background: var(--bg-card);
    border-left-color: var(--gold-dim);
}

.nav-links li a.active {
    color: var(--gold);
    background: rgba(201, 168, 76, 0.08);
    border-left-color: var(--gold);
}

.nav-links li a .nav-num {
    font-family: var(--font-display);
    font-size: 0.7rem;
    color: var(--gold-dim);
    min-width: 18px;
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    font-family: var(--font-ui);
    font-size: 0.65rem;
    color: var(--text-muted);
    text-align: center;
    letter-spacing: 1px;
}

/* Mobile hamburger */
.hamburger {
    display: none;
    position: fixed; top: 1rem; left: 1rem;
    z-index: 200; cursor: pointer;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.5rem 0.75rem;
    color: var(--gold);
    font-size: 1.2rem;
}

/* ===== MAIN CONTENT ===== */
.main-content {
    margin-left: 280px;
    min-height: 100vh;
}

/* Hero */
.hero {
    text-align: center;
    padding: 8rem 2rem 6rem;
    position: relative;
    background:
        radial-gradient(ellipse at 50% 0%, rgba(201,168,76,0.06) 0%, transparent 60%),
        var(--bg-deep);
    border-bottom: 1px solid var(--border);
}

.hero-classification {
    font-family: var(--font-ui);
    font-size: 0.72rem;
    letter-spacing: 4px;
    color: var(--gold);
    text-transform: uppercase;
    margin-bottom: 2rem;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
}

.hero-classification .dot {
    width: 6px; height: 6px;
    background: var(--gold);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--gold);
    animation: pulse 2.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(1.8); }
}

.hero h1 {
    font-family: var(--font-decorative);
    font-size: clamp(2.5rem, 6vw, 5rem);
    color: var(--ivory);
    letter-spacing: 6px;
    margin-bottom: 1rem;
    text-shadow: 0 4px 20px rgba(0,0,0,0.6);
}

.hero h3 {
    font-family: var(--font-display);
    font-size: clamp(0.9rem, 2vw, 1.4rem);
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: 2px;
    margin-bottom: 2rem;
}

.hero-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin: 2rem auto;
    max-width: 400px;
}

.hero-divider .line {
    flex: 1; height: 1px;
    background: linear-gradient(90deg, transparent, var(--gold-dim), transparent);
}

.hero-divider .icon { color: var(--gold); font-size: 1.2rem; }

.hero-governance {
    font-family: var(--font-ui);
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* Content container */
.content-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 3rem 2rem 6rem;
}

/* ===== SECTIONS ===== */
.section {
    display: none;
    margin-bottom: 4rem;
    opacity: 0;
    transform: translateY(15px);
}

.section.active-section {
    display: block;
    animation: sectionFadeIn 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes sectionFadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Progress Tracker */
.progress-tracker {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1rem 1.5rem;
    margin-bottom: 2.5rem;
    font-family: var(--font-ui);
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
    font-size: 0.8rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.progress-title {
    color: var(--text-secondary);
    font-weight: 600;
}

.progress-percentage {
    color: var(--gold);
    font-weight: 700;
}

.progress-bar-bg {
    height: 4px;
    background: rgba(255,255,255,0.05);
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--gold-dim), var(--gold));
    border-radius: 2px;
    transition: width 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Next Session Button */
.session-navigation {
    display: flex;
    justify-content: flex-end;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.btn-next-session {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: linear-gradient(135deg, var(--gold-dim), var(--gold));
    color: #111;
    border: none;
    padding: 0.9rem 1.8rem;
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    border-radius: var(--radius-sm);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.btn-next-session:hover {
    background: linear-gradient(135deg, var(--gold), var(--gold-bright));
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(201, 168, 76, 0.3);
}

.btn-next-session:active {
    transform: translateY(0);
}

.btn-next-session i {
    font-size: 1rem;
    transition: transform 0.3s ease;
}

.btn-next-session:hover i {
    transform: translateX(4px);
}


.section-divider {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding: 1.5rem 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.section-divider .part-label {
    font-family: var(--font-display);
    font-size: 0.75rem;
    color: var(--gold);
    letter-spacing: 4px;
    text-transform: uppercase;
    white-space: nowrap;
}

.section-divider .divider-line {
    flex: 1; height: 1px;
    background: var(--border);
}

.section h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--ivory);
    margin-bottom: 1.5rem;
    letter-spacing: 1px;
    line-height: 1.3;
}

.section h3 {
    font-family: var(--font-display);
    font-size: 1.4rem;
    color: var(--ivory-muted);
    margin: 2.5rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.section h4 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--parchment);
    margin: 2rem 0 0.75rem;
}

.section p {
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.section p strong { color: var(--text-primary); }

/* ===== COMPONENT STYLES ===== */

/* Alert boxes */
.alert {
    display: flex; gap: 1rem;
    padding: 1.25rem 1.5rem;
    border-radius: var(--radius-md);
    margin: 1.5rem 0;
    font-family: var(--font-ui);
    font-size: 0.92rem;
    line-height: 1.6;
}

.alert-gold {
    background: rgba(201,168,76,0.08);
    border-left: 3px solid var(--gold);
}

.alert-red {
    background: var(--crimson-soft);
    border-left: 3px solid var(--crimson);
}

.alert-green {
    background: var(--green-soft);
    border-left: 3px solid var(--green-muted);
}

.alert .alert-icon { font-size: 1.2rem; flex-shrink: 0; margin-top: 2px; }
.alert-gold .alert-icon { color: var(--gold); }
.alert-red .alert-icon { color: #d44; }
.alert-green .alert-icon { color: #5a9; }

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
    margin: 1.5rem 0;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--border-strong);
    box-shadow: var(--shadow-md);
}

.card h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--gold);
    margin: 0 0 0.75rem;
    padding: 0; border: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card p {
    font-size: 0.95rem;
    margin: 0;
    color: var(--text-secondary);
}

/* Tables */
.table-wrap {
    overflow-x: auto;
    margin: 1.5rem 0;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-ui);
    font-size: 0.9rem;
}

thead { background: rgba(201,168,76,0.08); }

th {
    padding: 0.85rem 1rem;
    text-align: left;
    color: var(--gold);
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-size: 0.75rem;
    border-bottom: 1px solid var(--border-strong);
}

td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}

tr:hover td { background: rgba(255,255,255,0.015); }

/* Tier list */
.tier-list { margin: 1.5rem 0; }

.tier {
    display: flex;
    align-items: stretch;
    margin-bottom: 0.5rem;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border);
}

.tier-badge {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.75rem 1rem;
    min-width: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    letter-spacing: 1px;
}

.tier-content {
    padding: 0.75rem 1.25rem;
    font-family: var(--font-ui);
    font-size: 0.9rem;
    color: var(--text-secondary);
    flex: 1;
    background: var(--bg-card);
}

.tier.t1 .tier-badge { background: var(--gold); color: #111; }
.tier.t2 .tier-badge { background: #6a6a6a; color: #fff; }
.tier.t3 .tier-badge { background: #4a5568; color: #ccc; }
.tier.t4 .tier-badge { background: #333; color: #888; }

/* Timeline */
.timeline {
    position: relative;
    margin: 2rem 0 2rem 1rem;
    padding-left: 2.5rem;
}

.timeline::before {
    content: '';
    position: absolute; left: 0; top: 0;
    width: 2px; height: 100%;
    background: linear-gradient(to bottom, var(--gold-dim), var(--border), transparent);
}

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
}

.timeline-dot {
    position: absolute;
    left: -2.85rem; top: 4px;
    width: 14px; height: 14px;
    border-radius: 50%;
    background: var(--bg-deep);
    border: 2px solid var(--gold-dim);
    transition: var(--transition);
    z-index: 1;
}

.timeline-item:hover .timeline-dot {
    background: var(--gold);
    box-shadow: 0 0 12px var(--gold-dim);
}

.timeline-item h4 {
    font-family: var(--font-display);
    color: var(--ivory-muted);
    margin: 0 0 0.5rem;
    padding: 0; border: 0;
}

.timeline-item p {
    font-size: 0.95rem;
    margin: 0;
}

/* Bullet lists */
.section ul, .section ol {
    margin: 1rem 0 1.5rem 1.5rem;
    color: var(--text-secondary);
}

.section li {
    margin-bottom: 0.6rem;
    padding-left: 0.25rem;
}

.section li strong { color: var(--text-primary); }

/* Checklist */
.checklist {
    list-style: none;
    margin-left: 0;
    padding: 0;
}

.checklist li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.6rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.03);
}

.checklist li::before {
    content: '☐';
    color: var(--gold);
    font-size: 1rem;
    flex-shrink: 0;
}

/* Blockquote */
.section blockquote {
    border-left: 3px solid var(--gold-dim);
    margin: 1.5rem 0;
    padding: 1rem 1.5rem;
    background: rgba(201,168,76,0.04);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: italic;
    color: var(--parchment);
    font-size: 1.1rem;
}

/* Prompt boxes */
.prompt-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    margin: 0.75rem 0;
    font-family: var(--font-ui);
    font-size: 0.88rem;
    color: var(--text-secondary);
    position: relative;
}

.prompt-box::before {
    content: 'PROMPT';
    position: absolute;
    top: -8px; left: 12px;
    background: var(--bg-card);
    padding: 0 6px;
    font-size: 0.6rem;
    color: var(--gold-dim);
    letter-spacing: 2px;
}

/* Essay example boxes */
.example-box {
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    margin: 0.75rem 0;
    font-family: var(--font-ui);
    font-size: 0.92rem;
}

.example-weak {
    background: var(--crimson-soft);
    border-left: 3px solid var(--crimson);
}

.example-strong {
    background: var(--green-soft);
    border-left: 3px solid var(--green-muted);
}

.example-box .label {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.example-weak .label { color: #d55; }
.example-strong .label { color: #5a9; }

/* Collapsible sections */
.collapsible {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin: 0.75rem 0;
    overflow: hidden;
}

.collapsible-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    background: var(--bg-card);
    cursor: pointer;
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--ivory-muted);
    transition: var(--transition);
    user-select: none;
}

.collapsible-header:hover { background: var(--bg-card-hover); }

.collapsible-header .arrow {
    transition: transform 0.3s ease;
    color: var(--gold-dim);
}

.collapsible.open .collapsible-header .arrow { transform: rotate(180deg); }

.collapsible-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    padding: 0 1.25rem;
}

.collapsible.open .collapsible-body {
    max-height: 3000px;
    padding: 1rem 1.25rem 1.5rem;
}

/* Footer */
.site-footer {
    text-align: center;
    padding: 4rem 2rem;
    border-top: 1px solid var(--border);
    margin-top: 4rem;
}

.site-footer blockquote {
    border: none;
    font-family: var(--font-body);
    font-size: 1.2rem;
    color: var(--gold);
    font-style: italic;
    margin-bottom: 2rem;
    background: none;
    padding: 0;
}

/* Sovereign Legal Footer Styles */
.footer-legal-container {
    text-align: left;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    font-family: var(--font-ui);
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.footer-supreme-authority {
    font-weight: 700;
    color: var(--gold-bright);
    text-transform: uppercase;
    letter-spacing: 1px;
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.footer-security-meta {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
    font-size: 0.78rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--gold);
    font-weight: 600;
}

.footer-security-meta .meta-divider {
    color: var(--border-strong);
}

.footer-legal-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.footer-legal-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.footer-legal-card:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-md);
}

.footer-legal-card .card-title {
    font-family: var(--font-display);
    color: var(--ivory);
    font-size: 0.92rem;
    letter-spacing: 1px;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
}

.footer-legal-card .card-text {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.footer-legal-card .card-email {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--gold-bright);
}

/* Cyber Warning Box */
.footer-warning-box {
    background: rgba(139, 32, 32, 0.05);
    border: 1px solid var(--crimson);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin-top: 2rem;
}

.footer-warning-box .warning-title {
    font-family: var(--font-display);
    color: #e55;
    font-size: 0.88rem;
    letter-spacing: 2px;
    margin-bottom: 0.4rem;
    text-transform: uppercase;
}

.footer-warning-box .warning-statute {
    font-family: var(--font-ui);
    font-size: 0.7rem;
    color: var(--crimson);
    font-weight: 700;
    letter-spacing: 1px;
    display: block;
    margin-bottom: 0.75rem;
}

.footer-warning-box .warning-text {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

/* Disclaimer Box */
.footer-disclaimer-box {
    margin-top: 2rem;
    font-size: 0.78rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.footer-disclaimer-box .disclaimer-text {
    margin-bottom: 0.8rem;
}

.footer-disclaimer-box .disclaimer-subtext {
    font-style: italic;
    color: var(--gold-dim);
}

/* Footnotes & Citation Indicators */
.footnote-ref {
    vertical-align: super;
    font-size: 0.72rem;
    color: var(--gold-bright);
    font-weight: 600;
    cursor: help;
    margin-left: 0.15rem;
    transition: color 0.2s ease;
}

.footnote-ref:hover {
    color: var(--gold);
    text-decoration: underline;
}



/* ===== RESPONSIVE ===== */
@media (max-width: 960px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .hamburger { display: block; }
    .main-content { margin-left: 0; }
    .hero { padding: 6rem 1.5rem 4rem; }
    .content-container { padding: 2rem 1.25rem 4rem; }
    .hero h1 { letter-spacing: 2px; }
    .card-grid { grid-template-columns: 1fr; }
    .footer-legal-grid { grid-template-columns: 1fr; gap: 1.5rem; }
}

@media (max-width: 600px) {
    .section h2 { font-size: 1.5rem; }
    .section h3 { font-size: 1.15rem; }
    .tier { flex-direction: column; }
    .tier-badge { min-width: unset; padding: 0.5rem; }
    body { font-size: 1rem; }
}