:root {
    --deep-forest: #1a2e1f;
    --moss-shadow: #3d5a3e;
    --living-sage: #6b8f6b;
    --verdigris: #5a8a7a;
    --pale-lichen: #b8c9b4;
    --morning-mist: #eae8e0;
    --parchment: #f4f1ea;
    --teal-whisper: #c2d4cc;
    --branch-green: #4a6741;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Lora', serif;
    background: var(--parchment);
    color: var(--deep-forest);
    overflow-x: hidden;
}

/* Noise overlay */
#noise-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    opacity: 0.03;
    mix-blend-mode: multiply;
    image-rendering: pixelated;
}

/* Scroll indicator */
#scroll-indicator {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 999;
    font-family: 'DM Mono', monospace;
    font-size: clamp(0.7rem, 1vw, 0.85rem);
    letter-spacing: 0.12em;
    color: var(--moss-shadow);
    opacity: 0.6;
}

/* Split container */
.split-container {
    display: grid;
    grid-template-columns: var(--split-left, 45%) var(--split-right, 55%);
    height: 100vh;
    position: relative;
    overflow: hidden;
    transition: grid-template-columns 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.panel {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.panel-light {
    background: var(--morning-mist);
}

.panel-dark {
    background: var(--deep-forest);
}

.panel canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Split gradient divider */
.split-gradient {
    position: absolute;
    top: 0;
    left: calc(var(--split-left, 45%) - 20px);
    width: 40px;
    height: 100%;
    background: linear-gradient(to right, var(--morning-mist), var(--deep-forest));
    z-index: 2;
    pointer-events: none;
    opacity: 0.7;
}

#premise .split-gradient {
    left: calc(var(--split-left, 55%) - 20px);
    background: linear-gradient(to right, var(--deep-forest), var(--morning-mist));
}

#theorem .split-gradient {
    left: calc(var(--split-left, 50%) - 20px);
}

/* Hero title */
#hero-title {
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 3;
}

.hero-letter {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 600;
    font-size: clamp(4rem, 10vw, 12rem);
    letter-spacing: 0.08em;
    color: var(--deep-forest);
    line-height: 0.85;
    opacity: 0;
    animation: fadeInLetter 0.8s ease forwards;
}

@keyframes fadeInLetter {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Text blocks */
.text-block {
    max-width: 480px;
    padding: 2rem;
    z-index: 3;
}

.section-headline {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 300;
    font-size: clamp(2rem, 5vw, 4rem);
    color: var(--deep-forest);
    margin-bottom: 1.5rem;
    line-height: 1.15;
}

.text-block p {
    font-family: 'Lora', serif;
    font-weight: 400;
    font-size: clamp(1rem, 1.8vw, 1.25rem);
    line-height: 1.85;
    letter-spacing: 0.01em;
    color: var(--moss-shadow);
    margin-bottom: 1.2rem;
}

.text-block p em {
    font-style: italic;
}

/* Slide reveal */
.slide-reveal {
    overflow: hidden;
}

.slide-reveal > * {
    transform: translateY(100%);
    opacity: 0;
    transition: transform 1.2s cubic-bezier(0.16, 1, 0.3, 1), opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.slide-reveal.revealed > * {
    transform: translateY(0);
    opacity: 1;
}

/* Full bleed section */
.full-bleed {
    position: relative;
    height: 100vh;
    background: var(--deep-forest);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.full-bleed canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

#branching-text {
    position: relative;
    z-index: 3;
    text-align: center;
}

.center-quote {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 300;
    font-size: clamp(2rem, 5vw, 4rem);
    color: var(--morning-mist);
    opacity: 0;
    transition: opacity 2s ease;
}

.center-quote.visible {
    opacity: 1;
}

/* Closing section */
.closing-container {
    display: grid;
    grid-template-columns: 30% 40% 30%;
    height: 100vh;
    position: relative;
    overflow: hidden;
}

.closing-panel {
    position: relative;
    background: var(--deep-forest);
    overflow: hidden;
}

.closing-panel canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.closing-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--parchment);
    z-index: 2;
}

.closing-title {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 600;
    font-size: clamp(3rem, 8vw, 8rem);
    color: var(--deep-forest);
    letter-spacing: 0.08em;
}

.closing-subtitle {
    font-family: 'Lora', serif;
    font-style: italic;
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    color: var(--moss-shadow);
    margin-top: 0.5rem;
}

/* Theorem breathing split */
#theorem {
    --breath-offset: 0;
}

@media (prefers-reduced-motion: reduce) {
    .hero-letter {
        animation: none;
        opacity: 1;
    }
    .slide-reveal > * {
        transform: none;
        opacity: 1;
        transition: none;
    }
    .center-quote {
        opacity: 1;
        transition: none;
    }
}