:root {
    --bg: #F5EDE0;
    --text-primary: #3D2F1E;
    --text-secondary: #7A6A55;
    --accent-warm: #C4A882;
    --accent-deep: #8B6F4E;
    --highlight: #E8D5B8;
    --shadow: #2A1F14;
    --mist: #D9CDB8;
}

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

body {
    background-color: var(--bg);
    color: var(--text-primary);
    font-family: 'Nunito', sans-serif;
    font-weight: 300;
    font-size: clamp(1rem, 1.8vw, 1.15rem);
    line-height: 1.85;
    letter-spacing: 0.02em;
    overflow-x: hidden;
}

/* Film Grain */
.grain-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 100;
    opacity: 0.03;
    mix-blend-mode: multiply;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='grain'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='256' height='256' filter='url(%23grain)' opacity='0.5'/%3E%3C/svg%3E");
    background-size: 256px 256px;
}

/* Progress Dots */
.progress-dots {
    position: fixed;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 50;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    border: 1px solid var(--mist);
    background: transparent;
    transition: background 0.6s ease, border-color 0.6s ease;
}

.dot.active {
    background: var(--accent-deep);
    border-color: var(--accent-deep);
}

/* Scroll Container */
.scroll-container {
    position: relative;
}

/* Moments */
.moment {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.moment + .moment {
    margin-top: 12vh;
}

/* Content Column */
.content-column {
    max-width: 640px;
    width: 90vw;
    margin: 0 auto;
    padding: 10vh 0;
    position: relative;
}

/* Threshold */
.threshold {
    min-height: 100vh;
    flex-direction: column;
}

.threshold-character {
    font-family: 'Zen Maru Gothic', sans-serif;
    font-weight: 700;
    font-size: clamp(15rem, 25vw, 30rem);
    color: var(--shadow);
    line-height: 1;
    letter-spacing: 0.08em;
    text-align: center;
    transition: color 0.3s ease;
}

.threshold-subtitle {
    font-family: 'Nunito', sans-serif;
    font-weight: 300;
    font-size: clamp(1rem, 2vw, 1.3rem);
    color: var(--text-secondary);
    text-align: center;
    letter-spacing: 0.15em;
    margin-top: 24px;
}

/* Body Text */
.body-text {
    font-family: 'Nunito', sans-serif;
    font-weight: 300;
    color: var(--text-primary);
    margin-bottom: 2rem;
}

/* Stone Steps (horizontal rules) */
.stone-step {
    border: none;
    height: 1px;
    background: var(--accent-warm);
    opacity: 0;
    margin: 3rem 0;
    transition: opacity 0.8s ease-out;
}

.stone-step.revealed {
    opacity: 0.3;
}

/* Epigraph Text */
.epigraph-text {
    font-family: 'Shippori Mincho', serif;
    font-weight: 400;
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    color: var(--accent-deep);
    text-align: center;
    letter-spacing: 0.04em;
    margin: 2rem 0 0.5rem;
}

.caption-text {
    font-family: 'Shippori Mincho', serif;
    font-weight: 400;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 2rem;
}

/* Ornaments */
.circle-ornament {
    display: block;
    margin: 0 0 2rem auto;
    transform: translateX(20px);
}

.triangle-ornament {
    display: block;
    margin: 0 auto 2rem;
}

/* Section Heading */
.section-heading {
    font-family: 'Zen Maru Gothic', sans-serif;
    font-weight: 700;
    font-size: clamp(2rem, 5vw, 4.5rem);
    letter-spacing: 0.08em;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 48px;
}

/* Hex Background */
.hex-background {
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0.03;
    background:
        radial-gradient(circle 3px at 10% 20%, var(--text-primary) 0%, transparent 100%),
        radial-gradient(circle 3px at 50% 20%, var(--text-primary) 0%, transparent 100%),
        radial-gradient(circle 3px at 90% 20%, var(--text-primary) 0%, transparent 100%),
        radial-gradient(circle 3px at 30% 50%, var(--text-primary) 0%, transparent 100%),
        radial-gradient(circle 3px at 70% 50%, var(--text-primary) 0%, transparent 100%),
        radial-gradient(circle 3px at 10% 80%, var(--text-primary) 0%, transparent 100%),
        radial-gradient(circle 3px at 50% 80%, var(--text-primary) 0%, transparent 100%),
        radial-gradient(circle 3px at 90% 80%, var(--text-primary) 0%, transparent 100%);
    background-size: 40px 40px;
}

/* Visualizations */
.viz-container {
    margin: 3rem 0;
    display: flex;
    justify-content: center;
}

.viz {
    text-align: center;
}

.coin-viz {
    perspective: 600px;
}

.coin {
    width: 80px;
    height: 80px;
    margin: 0 auto 16px;
    transform-style: preserve-3d;
    animation: coinSpin 8s ease-in-out infinite;
}

.coin-face {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Zen Maru Gothic', sans-serif;
    font-weight: 700;
    font-size: 1.8rem;
    backface-visibility: hidden;
}

.coin-heads {
    background: var(--highlight);
    color: var(--accent-deep);
    border: 2px solid var(--accent-warm);
}

.coin-tails {
    background: var(--accent-warm);
    color: var(--bg);
    border: 2px solid var(--accent-deep);
    transform: rotateY(180deg);
}

@keyframes coinSpin {
    0%, 10% { transform: rotateY(0deg); }
    40%, 60% { transform: rotateY(180deg); }
    90%, 100% { transform: rotateY(360deg); }
}

.viz-label {
    font-family: 'Shippori Mincho', serif;
    font-weight: 400;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.tree-viz {
    max-width: 300px;
    margin: 0 auto;
}

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

/* Afterimage */
.afterimage {
    min-height: 80vh;
}

.ghost-text {
    font-family: 'Nunito', sans-serif;
    font-weight: 300;
    color: var(--mist);
    text-align: center;
    font-size: clamp(1rem, 1.8vw, 1.15rem);
    max-width: 36ch;
    margin: 0 auto 4rem;
}

.final-mark {
    font-family: 'Zen Maru Gothic', sans-serif;
    font-weight: 400;
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--mist);
    text-align: center;
    letter-spacing: 0.08em;
}

/* Reveal */
[data-reveal] {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}

[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .content-column {
        width: 90vw;
        padding: 8vh 0;
    }

    .progress-dots {
        right: 12px;
    }

    .threshold-character {
        font-size: clamp(8rem, 20vw, 15rem);
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .coin {
        animation: none;
    }

    [data-reveal] {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .stone-step {
        opacity: 0.3;
        transition: none;
    }

    .threshold-character {
        transition: none;
    }
}