/* xanadu.wiki - Design Language Stylesheet */
/* Colors: #1a1a2e (deep base), #4a90d9 (primary blue), #f5f0e8 (warm off-white), #e8b84b (accent gold), #6c757d (muted gray) */
/* Fonts: Jost (substitute for Futura), Inter */

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

:root {
    --deep-base: #1a1a2e;
    --primary-blue: #4a90d9;
    --warm-white: #f5f0e8;
    --accent-gold: #e8b84b;
    --muted-gray: #6c757d;
    --deep-base-90: rgba(26, 26, 46, 0.9);
    --deep-base-70: rgba(26, 26, 46, 0.7);
    --primary-blue-20: rgba(74, 144, 217, 0.2);
    --primary-blue-10: rgba(74, 144, 217, 0.1);
    --accent-gold-20: rgba(232, 184, 75, 0.2);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--deep-base);
    color: var(--warm-white);
    line-height: 1.7;
    overflow-x: hidden;
    position: relative;
}

/* ===================== GRID BACKGROUND ===================== */
#grid-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(var(--primary-blue-10) 1px, transparent 1px),
        linear-gradient(90deg, var(--primary-blue-10) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.4;
}

/* ===================== DEPTH LAYERS ===================== */
.depth-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

#depth-layer-far {
    background: radial-gradient(ellipse at 20% 50%, rgba(74, 144, 217, 0.06) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 20%, rgba(232, 184, 75, 0.04) 0%, transparent 50%);
}

#depth-layer-mid {
    background: radial-gradient(ellipse at 60% 70%, rgba(74, 144, 217, 0.05) 0%, transparent 50%);
    z-index: 2;
}

#depth-layer-near {
    background: radial-gradient(ellipse at 40% 30%, rgba(232, 184, 75, 0.03) 0%, transparent 40%);
    z-index: 3;
}

/* ===================== HEADER ===================== */
#site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: linear-gradient(180deg, var(--deep-base) 0%, rgba(26, 26, 46, 0.95) 60%, rgba(26, 26, 46, 0) 100%);
    padding: 1.25rem 0;
    transition: background 0.3s ease;
}

#site-header.scrolled {
    background: var(--deep-base-90);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--primary-blue-10);
}

.header-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

#site-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    cursor: pointer;
}

.logo-symbol {
    font-size: 1.5rem;
    color: var(--accent-gold);
    transition: transform 0.3s ease;
}

#site-logo:hover .logo-symbol {
    transform: rotate(45deg);
}

.logo-text,
.footer-logo-text {
    font-family: 'Jost', sans-serif;
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--warm-white);
    letter-spacing: 0.02em;
}

.logo-dot {
    color: var(--accent-gold);
}

#main-nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-family: 'Jost', sans-serif;
    font-weight: 400;
    font-size: 0.9rem;
    color: var(--muted-gray);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    position: relative;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent-gold);
    transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--warm-white);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--warm-white);
    transition: all 0.3s ease;
}

.nav-toggle.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.open span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ===================== MOBILE NAV OVERLAY ===================== */
#mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--deep-base-90);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 99;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
}

#mobile-nav-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.mobile-nav-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.mobile-nav-link {
    font-family: 'Jost', sans-serif;
    font-weight: 500;
    font-size: 1.5rem;
    color: var(--muted-gray);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    transition: color 0.3s ease, transform 0.3s ease;
}

.mobile-nav-link:hover {
    color: var(--accent-gold);
    transform: translateX(8px);
}

/* ===================== MAIN CONTENT ===================== */
#main-content {
    position: relative;
    z-index: 10;
}

.wiki-section {
    max-width: 1280px;
    margin: 0 auto;
    padding: 6rem 2rem;
}

/* ===================== FADE REVEAL ===================== */
.fade-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ===================== HERO ===================== */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
    padding-top: 8rem;
}

.hero-content {
    flex: 1;
    max-width: 640px;
}

.hero-overline {
    font-family: 'Jost', sans-serif;
    font-weight: 400;
    font-size: 0.85rem;
    color: var(--accent-gold);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-family: 'Jost', sans-serif;
    font-weight: 700;
    line-height: 1.05;
    margin-bottom: 1.5rem;
}

.title-line {
    display: block;
    font-size: clamp(3rem, 7vw, 5.5rem);
    color: var(--warm-white);
}

.title-accent {
    color: var(--primary-blue);
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--muted-gray);
    line-height: 1.8;
    margin-bottom: 2.5rem;
    max-width: 520px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.btn {
    font-family: 'Jost', sans-serif;
    font-weight: 500;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0.85rem 2rem;
    border-radius: 2px;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-primary {
    background: var(--primary-blue);
    color: var(--warm-white);
    border: 1px solid var(--primary-blue);
}

.btn-primary:hover {
    background: transparent;
    color: var(--primary-blue);
    box-shadow: 0 0 20px var(--primary-blue-20);
}

.btn-outline {
    background: transparent;
    color: var(--accent-gold);
    border: 1px solid var(--accent-gold-20);
}

.btn-outline:hover {
    border-color: var(--accent-gold);
    box-shadow: 0 0 20px var(--accent-gold-20);
}

.hero-meta {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.meta-label {
    font-family: 'Jost', sans-serif;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--muted-gray);
}

.meta-value {
    font-family: 'Jost', sans-serif;
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--warm-white);
}

.meta-divider {
    width: 1px;
    height: 32px;
    background: var(--primary-blue-20);
}

.hero-visual {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 440px;
}

.hero-glyph {
    width: 100%;
    aspect-ratio: 1;
    position: relative;
}

.xanadu-symbol {
    width: 100%;
    height: 100%;
    animation: slowRotate 60s linear infinite;
}

@keyframes slowRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.node-pulse {
    animation: nodePulse 3s ease-in-out infinite;
}

.node-center-pulse {
    animation: centerPulse 2s ease-in-out infinite;
}

@keyframes nodePulse {
    0%, 100% { opacity: 0.6; r: 4; }
    50% { opacity: 1; r: 6; }
}

@keyframes centerPulse {
    0%, 100% { opacity: 0.7; r: 8; }
    50% { opacity: 1; r: 10; }
}

/* ===================== SECTION HEADERS ===================== */
.section-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 3.5rem;
}

.section-number {
    font-family: 'Jost', sans-serif;
    font-weight: 300;
    font-size: 0.85rem;
    color: var(--accent-gold);
    letter-spacing: 0.1em;
}

.section-title {
    font-family: 'Jost', sans-serif;
    font-weight: 600;
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    color: var(--warm-white);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    white-space: nowrap;
}

.section-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--primary-blue-20), transparent);
}

/* ===================== WIKI GRID (VISION) ===================== */
.wiki-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.wiki-card {
    background: rgba(26, 26, 46, 0.6);
    border: 1px solid var(--primary-blue-10);
    padding: 2.5rem;
    position: relative;
    transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.wiki-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-gold));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.wiki-card:hover {
    border-color: var(--primary-blue-20);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(74, 144, 217, 0.1);
}

.wiki-card:hover::before {
    transform: scaleX(1);
}

.card-icon {
    margin-bottom: 1.5rem;
}

.card-title {
    font-family: 'Jost', sans-serif;
    font-weight: 600;
    font-size: 1.3rem;
    color: var(--warm-white);
    margin-bottom: 1rem;
    letter-spacing: 0.02em;
}

.card-text {
    font-size: 0.95rem;
    color: var(--muted-gray);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.card-link {
    font-family: 'Jost', sans-serif;
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--accent-gold);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: color 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.card-link:hover {
    color: var(--primary-blue);
}

.card-link .arrow {
    transition: transform 0.3s ease;
}

.card-link:hover .arrow {
    transform: translateX(4px);
}

/* ===================== TIMELINE (HYPERTEXT) ===================== */
.timeline-container {
    position: relative;
    padding-left: 3rem;
}

.timeline-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-blue), var(--accent-gold), var(--primary-blue));
    opacity: 0.3;
}

.timeline-entry {
    position: relative;
    padding: 0 0 3.5rem 2.5rem;
}

.timeline-entry::before {
    content: '';
    position: absolute;
    left: -3.45rem;
    top: 0.5rem;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent-gold);
    border: 2px solid var(--deep-base);
    box-shadow: 0 0 10px var(--accent-gold-20);
}

.timeline-year {
    font-family: 'Jost', sans-serif;
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--primary-blue);
    letter-spacing: 0.08em;
    margin-bottom: 0.5rem;
}

.timeline-content h3 {
    font-family: 'Jost', sans-serif;
    font-weight: 600;
    font-size: 1.2rem;
    color: var(--warm-white);
    margin-bottom: 0.75rem;
}

.timeline-content p {
    font-size: 0.95rem;
    color: var(--muted-gray);
    line-height: 1.7;
    max-width: 640px;
}

/* ===================== ARCHIVE ===================== */
.archive-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
}

.archive-item {
    background: rgba(26, 26, 46, 0.5);
    border: 1px solid var(--primary-blue-10);
    overflow: hidden;
    transition: border-color 0.3s ease, transform 0.3s ease;
}

.archive-item:hover {
    border-color: var(--primary-blue-20);
    transform: translateY(-4px);
}

.archive-image {
    width: 100%;
    overflow: hidden;
}

.archive-image svg {
    width: 100%;
    height: auto;
    display: block;
}

.duotone {
    position: relative;
}

.duotone::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(74, 144, 217, 0.15), rgba(26, 26, 46, 0.3));
    pointer-events: none;
}

.archive-placeholder {
    width: 100%;
}

.archive-placeholder svg {
    width: 100%;
    height: auto;
}

.archive-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem 0;
}

.archive-category {
    font-family: 'Jost', sans-serif;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--accent-gold);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.archive-date {
    font-family: 'Jost', sans-serif;
    font-size: 0.8rem;
    color: var(--muted-gray);
}

.archive-title {
    font-family: 'Jost', sans-serif;
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--warm-white);
    padding: 0.75rem 1.5rem 0;
    line-height: 1.4;
}

.archive-excerpt {
    font-size: 0.9rem;
    color: var(--muted-gray);
    padding: 0.5rem 1.5rem 1.5rem;
    line-height: 1.6;
}

/* ===================== ABOUT ===================== */
.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.about-quote {
    border-left: 3px solid var(--accent-gold);
    padding: 1.5rem 2rem;
    margin-bottom: 2rem;
    background: rgba(232, 184, 75, 0.03);
}

.about-quote p {
    font-family: 'Jost', sans-serif;
    font-weight: 300;
    font-size: 1.2rem;
    font-style: italic;
    color: var(--warm-white);
    line-height: 1.6;
    margin-bottom: 0.75rem;
}

.about-quote cite {
    font-family: 'Jost', sans-serif;
    font-size: 0.85rem;
    color: var(--accent-gold);
    font-style: normal;
}

.about-text {
    font-size: 1rem;
    color: var(--muted-gray);
    line-height: 1.8;
    margin-bottom: 1.25rem;
}

.sidebar-card {
    background: rgba(26, 26, 46, 0.6);
    border: 1px solid var(--primary-blue-10);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.sidebar-title {
    font-family: 'Jost', sans-serif;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--accent-gold);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--primary-blue-10);
}

.sidebar-list {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.5rem 1rem;
}

.sidebar-list dt {
    font-family: 'Jost', sans-serif;
    font-size: 0.85rem;
    color: var(--muted-gray);
}

.sidebar-list dd {
    font-family: 'Jost', sans-serif;
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--warm-white);
    text-align: right;
}

.sidebar-links {
    list-style: none;
}

.sidebar-links li {
    margin-bottom: 0.5rem;
}

.sidebar-links a {
    font-family: 'Jost', sans-serif;
    font-size: 0.85rem;
    color: var(--primary-blue);
    text-decoration: none;
    transition: color 0.3s ease;
}

.sidebar-links a:hover {
    color: var(--accent-gold);
}

/* ===================== FOOTER ===================== */
#site-footer {
    position: relative;
    z-index: 10;
    border-top: 1px solid var(--primary-blue-10);
    padding: 3rem 2rem;
    margin-top: 2rem;
}

.footer-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    font-family: 'Jost', sans-serif;
    font-size: 0.85rem;
    color: var(--muted-gray);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--accent-gold);
}

.footer-copy p {
    font-size: 0.8rem;
    color: var(--muted-gray);
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 900px) {
    #main-nav {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    #hero {
        flex-direction: column;
        text-align: center;
        padding-top: 6rem;
    }

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

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

    .hero-actions {
        justify-content: center;
    }

    .hero-meta {
        justify-content: center;
    }

    .hero-visual {
        max-width: 300px;
    }

    .wiki-grid {
        grid-template-columns: 1fr;
    }

    .archive-grid {
        grid-template-columns: 1fr;
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    .section-header {
        flex-wrap: wrap;
    }

    .section-title {
        white-space: normal;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 600px) {
    .wiki-section {
        padding: 4rem 1.25rem;
    }

    .header-inner {
        padding: 0 1.25rem;
    }

    .title-line {
        font-size: 2.5rem;
    }

    .timeline-container {
        padding-left: 2rem;
    }

    .timeline-entry {
        padding-left: 1.5rem;
    }

    .timeline-entry::before {
        left: -2.45rem;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }
}