:root {
    --deep-ground: #0B1F0E;
    --primary-dark: #132B17;
    --mid-forest: #2D5E3A;
    --primary-green: #4A8F5C;
    --bright-accent: #7DD99B;
    --warm-amber: #D4A847;
    --text-primary: #C8DCC9;
    --text-secondary: #8BA88E;
    --column-width: min(640px, 90vw);
    color-scheme: dark;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--deep-ground);
    color: var(--text-primary);
    font-family: 'Commissioner', sans-serif;
    font-weight: 300;
    font-size: clamp(1rem, 1.8vw, 1.15rem);
    line-height: 1.75;
    letter-spacing: 0.01em;
    overflow-x: hidden;
}

/* Forest Canvas */
#forestCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
}

/* Firefly Layer */
.firefly-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1;
    pointer-events: none;
    overflow: hidden;
}

.firefly {
    position: absolute;
    border-radius: 50%;
    background: var(--warm-amber);
    opacity: 0.3;
    animation: fireflyPulse 3s ease-in-out infinite;
}

@keyframes fireflyPulse {
    0%, 100% { box-shadow: 0 0 4px rgba(212, 168, 71, 0.2); opacity: 0.2; }
    50% { box-shadow: 0 0 8px rgba(212, 168, 71, 0.5); opacity: 0.4; }
}

/* Return to Top */
.return-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 100;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.6s ease;
    pointer-events: none;
    padding: 8px;
}

.return-top.visible {
    opacity: 0.3;
    pointer-events: auto;
}

.return-top:hover {
    opacity: 0.7;
}

/* Content Column */
.content-column {
    position: relative;
    z-index: 2;
    max-width: var(--column-width);
    margin: 0 auto;
    padding: 0 5vw;
}

/* Content Blocks */
.content-block {
    padding: 20vh 0;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s ease-out, transform 1s ease-out;
}

.content-block.revealed {
    opacity: 1;
    transform: translateY(0);
}

.opening {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.closing {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Titles */
.site-title {
    font-family: 'Commissioner', sans-serif;
    font-weight: 500;
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    letter-spacing: -0.02em;
    line-height: 1.2;
    color: var(--bright-accent);
    margin-bottom: 24px;
}

.epigraph {
    font-weight: 300;
    color: var(--text-secondary);
    max-width: 40ch;
    margin: 0 auto;
}

.section-heading {
    font-family: 'Commissioner', sans-serif;
    font-weight: 500;
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    letter-spacing: -0.02em;
    line-height: 1.2;
    color: var(--bright-accent);
    margin-bottom: 24px;
}

.body-text {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.meta-label {
    font-family: 'Space Mono', monospace;
    font-weight: 400;
    font-size: 0.75rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-secondary);
    opacity: 0.6;
    display: block;
    margin-bottom: 16px;
}

.closing-text {
    font-family: 'Commissioner', sans-serif;
    font-weight: 500;
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    color: var(--bright-accent);
    text-align: center;
    opacity: 0.6;
}

/* Card Flip */
.card-flip-section {
    margin: 20vh 0;
    perspective: 1200px;
}

.card-shell {
    position: relative;
    width: 100%;
    transform-style: preserve-3d;
    transition: transform 800ms ease-out;
}

.card-shell.flipped {
    transform: rotateY(180deg);
}

.card-face {
    backface-visibility: hidden;
    border-radius: 4px;
    padding: 48px 32px;
}

.card-front {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-dark);
    border: 1px solid rgba(45, 94, 58, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.card-back {
    transform: rotateY(180deg);
    background: rgba(11, 31, 14, 0.88);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(45, 94, 58, 0.3);
}

.sealed-label {
    font-family: 'Space Mono', monospace;
    font-weight: 400;
    font-size: 0.75rem;
    letter-spacing: 0.06em;
    color: var(--text-secondary);
    opacity: 0.4;
    position: absolute;
    bottom: 16px;
    right: 16px;
}

/* Noise Patterns (Perlin-like CSS gradients) */
.noise-pattern {
    position: absolute;
    inset: 0;
    opacity: 0.5;
}

.noise-a {
    background:
        radial-gradient(circle 80px at 20% 30%, #2D5E3A 0%, transparent 100%),
        radial-gradient(circle 60px at 70% 60%, #1A3D22 0%, transparent 100%),
        radial-gradient(circle 100px at 50% 20%, #132B17 0%, transparent 100%),
        radial-gradient(circle 40px at 80% 80%, #2D5E3A 0%, transparent 100%);
}

.noise-b {
    background:
        radial-gradient(circle 70px at 30% 70%, #1A3D22 0%, transparent 100%),
        radial-gradient(circle 90px at 60% 30%, #2D5E3A 0%, transparent 100%),
        radial-gradient(circle 50px at 10% 40%, #132B17 0%, transparent 100%),
        radial-gradient(circle 60px at 85% 50%, #2D5E3A 0%, transparent 100%);
}

.noise-c {
    background:
        radial-gradient(circle 55px at 40% 25%, #2D5E3A 0%, transparent 100%),
        radial-gradient(circle 80px at 15% 65%, #132B17 0%, transparent 100%),
        radial-gradient(circle 65px at 75% 40%, #1A3D22 0%, transparent 100%),
        radial-gradient(circle 45px at 55% 80%, #2D5E3A 0%, transparent 100%);
}

.noise-d {
    background:
        radial-gradient(circle 90px at 25% 50%, #132B17 0%, transparent 100%),
        radial-gradient(circle 50px at 65% 20%, #2D5E3A 0%, transparent 100%),
        radial-gradient(circle 70px at 45% 75%, #1A3D22 0%, transparent 100%),
        radial-gradient(circle 60px at 80% 60%, #132B17 0%, transparent 100%);
}

/* Responsive */
@media (max-width: 768px) {
    .content-column {
        padding: 0 24px;
    }

    .card-face {
        padding: 32px 20px;
    }

    .content-block {
        padding: 15vh 0;
    }

    .card-flip-section {
        margin: 15vh 0;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .firefly {
        animation: none;
        opacity: 0.3;
    }

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

    .content-block {
        opacity: 1;
        transform: none;
        transition: none;
    }

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