/* ============================================
   taisho.day — Crystalline Taisho Experience
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --deep-burgundy: #5c1a2a;
    --warm-cream: #f5efe6;
    --lacquer-red: #8b2e3b;
    --taisho-gold: #c49a6c;
    --ink-charcoal: #2a2420;
    --smoke-blue: #7a7b8e;
    --parchment: #ebe3d6;
    --pearl: rgba(255, 255, 255, 0.15);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Cormorant Garamond', serif;
    color: var(--ink-charcoal);
    background-color: var(--warm-cream);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* --- Particle Canvas --- */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

/* --- Scroll Indicator --- */
#scroll-indicator {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 100;
    opacity: 0.8;
}

/* ============================================
   SECTION 1: Crystalline Portal
   ============================================ */
.section-hero {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    z-index: 1;
}

.hero-gradient {
    position: absolute;
    top: -10%;
    left: -10%;
    width: 120%;
    height: 120%;
    background: radial-gradient(ellipse at 50% 50%, #5c1a2a 0%, #f5efe6 100%);
    animation: hero-breathe 8s ease-in-out infinite alternate;
    z-index: 0;
}

@keyframes hero-breathe {
    0% { transform: scale(1); }
    100% { transform: scale(1.05); }
}

/* Hero Hexagonal Frame */
.hero-frame {
    position: absolute;
    width: clamp(280px, 50vw, 500px);
    height: clamp(280px, 50vw, 500px);
    animation: frame-rotate 720s linear infinite;
    z-index: 1;
}

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

.frame-side {
    position: absolute;
    top: 50%;
    left: 50%;
    width: clamp(140px, 25vw, 250px);
    height: 2px;
    background: var(--deep-burgundy);
    transform-origin: 0% 50%;
    transform: translate(0, -50%) rotate(calc(var(--i) * 60deg)) translateX(clamp(120px, 22vw, 220px));
}

/* Hero Content */
.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.hero-glass {
    padding: clamp(2rem, 5vw, 4rem) clamp(3rem, 8vw, 6rem);
    background: rgba(235, 227, 214, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
}

.hero-kanji {
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 700;
    font-size: clamp(6rem, 15vw, 18rem);
    letter-spacing: 0.08em;
    color: var(--ink-charcoal);
    line-height: 1;
}

.hero-subtitle {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 300;
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--smoke-blue);
    margin-top: 0.5rem;
}

.hero-tagline {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 400;
    font-style: italic;
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--deep-burgundy);
    margin-top: 1rem;
}

/* ============================================
   SECTION 2: Honeycomb Narrative Grid
   ============================================ */
.section-honeycomb {
    position: relative;
    padding: 8rem 2rem;
    z-index: 1;
}

.honeycomb-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.honeycomb-grid {
    position: relative;
    max-width: 1100px;
    margin: 0 auto;
    z-index: 1;
}

.hex-row {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: -3rem;
}

.hex-row:first-child {
    margin-top: 0;
}

.hex-row-3 {
    margin-left: 0;
}

/* Hexagonal Card */
.hex-card {
    position: relative;
    width: clamp(220px, 28vw, 320px);
    height: clamp(250px, 32vw, 360px);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    background: var(--warm-cream);
    cursor: pointer;
    transition: clip-path 400ms cubic-bezier(0.16, 1, 0.3, 1);
    opacity: 0;
    transform: translateY(20px);
    flex-shrink: 0;
}

.hex-card.revealed {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 400ms ease, transform 600ms cubic-bezier(0.16, 1, 0.3, 1), clip-path 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

.hex-card-alt {
    background: var(--parchment);
}

.hex-card:hover {
    clip-path: polygon(50% -2%, 102% 24%, 102% 76%, 50% 102%, -2% 76%, -2% 24%);
}

/* Hex Vertices */
.hex-vertices {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 3;
}

.vertex {
    position: absolute;
    left: var(--vx);
    top: var(--vy);
    width: 4px;
    height: 4px;
    background: var(--taisho-gold);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: vertex-pulse 3s ease-in-out infinite;
    animation-delay: calc(var(--vx, 0) * 0.01s);
}

@keyframes vertex-pulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

/* Hex Inner Content */
.hex-inner {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2.5rem 1.5rem;
    text-align: center;
    z-index: 1;
}

.hex-kanji {
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--deep-burgundy);
    opacity: 0.3;
    margin-bottom: 0.25rem;
}

.hex-title {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 500;
    font-size: clamp(1.4rem, 3vw, 2rem);
    color: var(--ink-charcoal);
    margin-bottom: 0.75rem;
}

.hex-text {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 400;
    font-size: clamp(0.85rem, 1.4vw, 1rem);
    line-height: 1.75;
    color: var(--ink-charcoal);
}

/* Glassmorphic Overlay */
.hex-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2.5rem 1.5rem;
    z-index: 2;
    opacity: 0;
    transition: opacity 400ms ease, transform 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

.hex-card[data-reveal="left"] .hex-overlay {
    transform: translateX(-100%);
}
.hex-card[data-reveal="right"] .hex-overlay {
    transform: translateX(100%);
}
.hex-card[data-reveal="bottom"] .hex-overlay {
    transform: translateY(100%);
}

.hex-card:hover .hex-overlay {
    opacity: 1;
    transform: translateX(0) translateY(0);
}

.hex-overlay-text {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 400;
    font-style: italic;
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--ink-charcoal);
    text-align: center;
}

/* ============================================
   SECTION 3: Crystalline Timeline
   ============================================ */
.section-timeline {
    position: relative;
    padding: 6rem 2rem;
    min-height: 200vh;
    z-index: 1;
    background: linear-gradient(to bottom, #f5efe6 0%, #ebe3d6 50%, #f5efe6 100%);
}

.timeline-line {
    position: absolute;
    left: calc(33.333% - 1px);
    top: 6rem;
    bottom: 6rem;
    width: 1px;
    background: rgba(196, 154, 108, 0.3);
}

.timeline-entries {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.timeline-entry {
    position: relative;
    padding: 3rem 0;
    padding-left: 33.333%;
    display: flex;
    align-items: flex-start;
}

/* Timeline Node */
.timeline-node {
    position: absolute;
    left: calc(33.333% - 12px);
    top: 3rem;
    width: 24px;
    height: 28px;
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    background: var(--deep-burgundy);
    transform: scale(0.5);
    opacity: 0;
    transition: transform 300ms ease, opacity 300ms ease;
}

.timeline-entry.active .timeline-node {
    transform: scale(1);
    opacity: 1;
    background: var(--lacquer-red);
}

.kamon-watermark {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    border: 1px solid var(--deep-burgundy);
    border-radius: 50%;
    opacity: 0.04;
}

.timeline-year {
    position: absolute;
    left: 0;
    top: 3rem;
    width: calc(33.333% - 24px);
    text-align: right;
    padding-right: 1.5rem;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 2rem;
    font-feature-settings: "tnum";
    color: var(--smoke-blue);
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 400ms ease, transform 500ms cubic-bezier(0.16, 1, 0.3, 1);
}

.timeline-entry.active .timeline-year {
    opacity: 1;
    transform: translateX(0);
}

.timeline-event {
    padding-left: 2rem;
    opacity: 0;
    transform: translateX(100px);
    transition: opacity 400ms ease, transform 500ms cubic-bezier(0.16, 1, 0.3, 1);
}

.timeline-entry.active .timeline-event {
    opacity: 1;
    transform: translateX(0);
}

.timeline-desc {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 400;
    font-style: italic;
    font-size: 0.95rem;
    line-height: 1.75;
    color: var(--ink-charcoal);
    max-width: 400px;
}

/* Timeline Motifs - CSS geometric shapes */
.timeline-motif {
    width: 32px;
    height: 32px;
    margin-top: 1rem;
    opacity: 0.15;
}

.motif-crown {
    border-left: 16px solid transparent;
    border-right: 16px solid transparent;
    border-bottom: 24px solid var(--deep-burgundy);
}

.motif-scroll {
    width: 32px;
    height: 24px;
    border: 2px solid var(--deep-burgundy);
    border-radius: 4px;
}

.motif-gear {
    width: 28px;
    height: 28px;
    border: 3px solid var(--deep-burgundy);
    border-radius: 50%;
}

.motif-book {
    width: 24px;
    height: 30px;
    border: 2px solid var(--deep-burgundy);
    border-left: 4px solid var(--deep-burgundy);
}

.motif-diamond {
    width: 20px;
    height: 20px;
    background: var(--deep-burgundy);
    transform: rotate(45deg);
}

.motif-prism {
    width: 0;
    height: 0;
    border-left: 16px solid transparent;
    border-right: 16px solid transparent;
    border-bottom: 28px solid var(--deep-burgundy);
}

.motif-building {
    width: 24px;
    height: 32px;
    background: var(--deep-burgundy);
    clip-path: polygon(50% 0%, 100% 30%, 100% 100%, 0% 100%, 0% 30%);
}

.motif-wave {
    width: 32px;
    height: 16px;
    border-bottom: 3px solid var(--deep-burgundy);
    border-radius: 0 0 50% 50%;
}

.motif-fragment {
    width: 24px;
    height: 28px;
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    background: var(--deep-burgundy);
}

/* ============================================
   SECTION 4: Dissolution Coda
   ============================================ */
.section-coda {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f5efe6 0%, #5c1a2a 100%);
    overflow: hidden;
    z-index: 1;
}

.coda-hexagon {
    position: relative;
    width: 240px;
    height: 280px;
}

.coda-fragment {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fragment-drift 10s cubic-bezier(0.37, 0, 0.63, 1) infinite alternate;
}

.coda-fragment:nth-child(1) { top: 0; left: 50%; transform: translate(-50%, 0); --dx: 0px; --dy: -50px; --rot: 5deg; }
.coda-fragment:nth-child(2) { top: 25%; right: 0; --dx: 50px; --dy: -25px; --rot: 10deg; }
.coda-fragment:nth-child(3) { top: 55%; right: 0; --dx: 50px; --dy: 25px; --rot: -8deg; }
.coda-fragment:nth-child(4) { bottom: 0; left: 50%; transform: translate(-50%, 0); --dx: 0px; --dy: 50px; --rot: -5deg; }
.coda-fragment:nth-child(5) { top: 55%; left: 0; --dx: -50px; --dy: 25px; --rot: 12deg; }
.coda-fragment:nth-child(6) { top: 25%; left: 0; --dx: -50px; --dy: -25px; --rot: -15deg; }

@keyframes fragment-drift {
    0% {
        translate: 0 0;
        rotate: 0deg;
        opacity: 1;
    }
    100% {
        translate: var(--dx) var(--dy);
        rotate: var(--rot);
        opacity: 0.5;
    }
}

.coda-kanji {
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 700;
    font-size: clamp(2.5rem, 5vw, 4rem);
    color: var(--warm-cream);
    text-shadow: 0 0 20px rgba(92, 26, 42, 0.3);
}

.coda-label {
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 400;
    font-size: 1.25rem;
    color: var(--smoke-blue);
    margin-top: 3rem;
    letter-spacing: 0.2em;
}

.coda-sublabel {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 300;
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--smoke-blue);
    opacity: 0.6;
    margin-top: 0.5rem;
}

/* ============================================
   Responsive: Mobile
   ============================================ */
@media (max-width: 768px) {
    .hex-row {
        flex-direction: column;
        align-items: center;
        gap: 2rem;
        margin-top: 0;
    }

    .hex-card {
        width: 280px;
        height: 320px;
    }

    .section-honeycomb {
        padding: 4rem 1rem;
    }

    .timeline-line {
        left: 24px;
    }

    .timeline-entry {
        padding-left: 60px;
    }

    .timeline-node {
        left: 12px;
    }

    .timeline-year {
        position: relative;
        width: auto;
        text-align: left;
        padding-right: 0;
        font-size: 1.5rem;
    }

    .timeline-entry {
        flex-direction: column;
    }

    .timeline-event {
        padding-left: 0;
        padding-top: 0.5rem;
    }

    .coda-hexagon {
        width: 180px;
        height: 210px;
    }
}