:root {
    --void-base: #060F08;
    --fog-ground: #0B1F12;
    --mid-canopy: #1A3D24;
    --living-green: #3D6B4C;
    --luminous-leaf: #5E9E6E;
    --glow-mist: #A8D5B8;
    --card-light: #E8F0E8;
    --fog-white: #F0F5F0;
    --warm-ember: #D4A857;
    color-scheme: dark;
}

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

body {
    background-color: var(--void-base);
    color: #C8DCC8;
    font-family: 'Commissioner', sans-serif;
    font-weight: 300;
    font-size: clamp(1rem, 1.8vw, 1.2rem);
    line-height: 1.85;
    overflow-x: hidden;
}

/* Fog Vignette */
.fog-vignette {
    position: fixed;
    inset: 0;
    background: radial-gradient(ellipse at 50% 50%, transparent 30%, rgba(8, 30, 16, 0.85) 100%);
    pointer-events: none;
    z-index: 40;
}

/* Depth Gauge */
.depth-gauge {
    position: fixed;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    height: 70vh;
    z-index: 50;
}

.depth-track {
    position: absolute;
    left: 0;
    top: 0;
    width: 2px;
    height: 100%;
    background: var(--living-green);
    opacity: 0.4;
}

.depth-dot {
    position: absolute;
    left: -3px;
    top: 0;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--fog-white);
    box-shadow: 0 0 8px rgba(240, 245, 240, 0.5);
    transition: top 0.1s linear;
}

.depth-label {
    position: absolute;
    left: 12px;
    font-family: 'Commissioner', sans-serif;
    font-weight: 200;
    font-size: 0.56rem;
    letter-spacing: 0.15em;
    color: var(--living-green);
    opacity: 0.4;
    white-space: nowrap;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
}

/* Strata */
.stratum {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    z-index: 1;
}

.stratum-origin {
    background: var(--void-base);
}

.stratum-convergence {
    min-height: 120vh;
    background: linear-gradient(180deg, var(--void-base) 0%, var(--fog-ground) 15%, var(--fog-ground) 100%);
}

.stratum-lattice {
    min-height: 150vh;
    background: var(--fog-ground);
    box-shadow: inset 0 0 200px rgba(94, 158, 110, 0.04);
}

.stratum-dissolution {
    min-height: 120vh;
    background: linear-gradient(180deg, var(--fog-ground) 0%, var(--mid-canopy) 40%, var(--mid-canopy) 100%);
}

.stratum-echo {
    min-height: 100vh;
    background: linear-gradient(180deg, var(--mid-canopy) 0%, var(--void-base) 30%, var(--void-base) 100%);
}

.void-end {
    height: 40vh;
    background: var(--void-base);
}

/* Content Column */
.content-column {
    width: clamp(22rem, 48vw, 42rem);
    max-width: 100%;
    padding: 0 24px;
    position: relative;
    z-index: 10;
}

/* Titles */
.site-title {
    font-family: 'Commissioner', sans-serif;
    font-weight: 200;
    font-size: clamp(1.4rem, 3vw, 2.2rem);
    letter-spacing: 0.3em;
    color: var(--glow-mist);
    text-align: center;
    opacity: 0.6;
    margin-bottom: 32px;
}

.stratum-title {
    font-family: 'Commissioner', sans-serif;
    font-weight: 700;
    font-size: clamp(2.4rem, 5.5vw, 4.2rem);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--glow-mist);
    text-shadow: 0 0 40px rgba(168, 213, 184, 0.3), 0 0 80px rgba(168, 213, 184, 0.1);
    margin-bottom: 48px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1.4s ease, transform 1.4s ease;
}

.stratum-title.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Epigraph / Epitaph */
.epigraph {
    font-weight: 300;
    text-align: center;
    color: #C8DCC8;
    opacity: 0.7;
    max-width: 40ch;
    margin: 0 auto;
}

.epitaph {
    font-weight: 200;
    text-align: center;
    color: var(--glow-mist);
    opacity: 0.4;
    font-size: clamp(1rem, 2vw, 1.3rem);
}

/* Body Text */
.body-text {
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 1.4s ease, transform 1.4s ease;
}

.body-text.revealed {
    opacity: 1;
    transform: translateY(0);
}

.lattice-text {
    line-height: 2.2;
}

/* Breathing Margins */
.breathing {
    animation: breathe 12s ease-in-out infinite;
}

@keyframes breathe {
    0%, 100% { margin-top: 3.5rem; }
    50% { margin-top: 5rem; }
}

/* Card Flip Panels */
.card-flip-panel {
    width: min(320px, 80vw);
    aspect-ratio: 3 / 4;
    margin: 48px auto;
    perspective: 1200px;
    cursor: pointer;
}

.card-container {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    transition: transform 1.4s cubic-bezier(0.23, 1, 0.32, 1);
}

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

.card-back-face, .card-front-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 2px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.card-back-face {
    background: var(--fog-ground);
    border: 1px solid rgba(61, 107, 76, 0.2);
    overflow: hidden;
}

.card-front-face {
    transform: rotateY(180deg);
    background: var(--card-light);
    border: 1px solid rgba(61, 107, 76, 0.2);
}

.card-back-label {
    font-family: 'Commissioner', sans-serif;
    font-weight: 200;
    font-size: 0.7rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--living-green);
    opacity: 0.6;
    position: absolute;
    bottom: 16px;
}

.card-title {
    font-family: 'Commissioner', sans-serif;
    font-weight: 500;
    font-size: 1.1rem;
    color: var(--fog-ground);
    margin-bottom: 12px;
    text-align: center;
}

.card-rule {
    width: 40px;
    height: 1px;
    background: var(--warm-ember);
    margin-bottom: 12px;
}

.card-body-text {
    font-family: 'Commissioner', sans-serif;
    font-weight: 500;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--fog-ground);
    text-align: center;
}

/* Card Patterns */
.card-pattern {
    position: absolute;
    inset: 0;
    opacity: 0.3;
}

.pattern-hex {
    background:
        linear-gradient(60deg, var(--mid-canopy) 25%, transparent 25.5%, transparent 75%, var(--mid-canopy) 75.5%),
        linear-gradient(-60deg, var(--mid-canopy) 25%, transparent 25.5%, transparent 75%, var(--mid-canopy) 75.5%);
    background-size: 40px 70px;
}

.pattern-crosshatch {
    background:
        repeating-linear-gradient(30deg, transparent, transparent 10px, var(--living-green) 10px, var(--living-green) 10.5px),
        repeating-linear-gradient(-30deg, transparent, transparent 10px, var(--living-green) 10px, var(--living-green) 10.5px);
}

.pattern-radial {
    background: repeating-conic-gradient(from 0deg, transparent 0deg, transparent 7deg, var(--living-green) 7deg, var(--living-green) 7.5deg);
}

/* Scan Lines */
.scan-line {
    position: absolute;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--luminous-leaf);
    opacity: 0.08;
    z-index: 5;
}

.scan-down {
    animation: scanDown 25s linear infinite;
}

.scan-up {
    animation: scanUp 25s linear infinite;
}

@keyframes scanDown {
    0% { top: 0; }
    100% { top: 100%; }
}

@keyframes scanUp {
    0% { top: 100%; }
    100% { top: 0; }
}

/* Temporal Rings */
.temporal-ring {
    position: absolute;
    border-radius: 50%;
    border: 0.5px solid var(--glow-mist);
    pointer-events: none;
    z-index: 3;
}

.ring-1 { width: 120px; height: 120px; top: 30%; left: 20%; animation: ringExpand 12s ease-in-out infinite; }
.ring-2 { width: 80px; height: 80px; top: 60%; right: 25%; animation: ringExpand 16s ease-in-out infinite -5s; }
.ring-3 { width: 100px; height: 100px; top: 45%; left: 50%; animation: ringExpand 10s ease-in-out infinite -3s; }
.ring-4 { width: 150px; height: 150px; top: 25%; left: 15%; animation: ringExpand 14s ease-in-out infinite -2s; }
.ring-5 { width: 90px; height: 90px; top: 70%; right: 20%; animation: ringExpand 18s ease-in-out infinite -8s; }

@keyframes ringExpand {
    0%, 100% { transform: scale(0.5); opacity: 0.02; }
    50% { transform: scale(1.5); opacity: 0.12; }
}

/* Echo Glyph */
.echo-glyph {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    z-index: 2;
}

.glyph-svg {
    width: 100%;
    height: 100%;
    animation: glyphRotate 120s linear infinite;
}

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

/* Fog Nodes (CSS backgrounds) */
.fog-nodes {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 2;
}

.fog-sparse {
    background:
        radial-gradient(circle 6px at 15% 30%, rgba(94,158,110,0.12) 0%, transparent 100%),
        radial-gradient(circle 8px at 70% 20%, rgba(94,158,110,0.08) 0%, transparent 100%),
        radial-gradient(circle 5px at 40% 70%, rgba(94,158,110,0.1) 0%, transparent 100%),
        radial-gradient(circle 10px at 85% 60%, rgba(94,158,110,0.06) 0%, transparent 100%),
        radial-gradient(circle 4px at 25% 85%, rgba(94,158,110,0.15) 0%, transparent 100%);
}

.fog-medium {
    background:
        radial-gradient(circle 5px at 10% 15%, rgba(94,158,110,0.2) 0%, transparent 100%),
        radial-gradient(circle 7px at 30% 40%, rgba(94,158,110,0.15) 0%, transparent 100%),
        radial-gradient(circle 4px at 55% 25%, rgba(94,158,110,0.25) 0%, transparent 100%),
        radial-gradient(circle 6px at 75% 55%, rgba(94,158,110,0.18) 0%, transparent 100%),
        radial-gradient(circle 8px at 20% 70%, rgba(94,158,110,0.12) 0%, transparent 100%),
        radial-gradient(circle 5px at 60% 80%, rgba(94,158,110,0.2) 0%, transparent 100%),
        radial-gradient(circle 4px at 90% 35%, rgba(94,158,110,0.22) 0%, transparent 100%),
        radial-gradient(circle 6px at 45% 60%, rgba(94,158,110,0.16) 0%, transparent 100%);
}

.fog-dense {
    background:
        radial-gradient(circle 4px at 8% 12%, rgba(94,158,110,0.25) 0%, transparent 100%),
        radial-gradient(circle 5px at 18% 35%, rgba(94,158,110,0.3) 0%, transparent 100%),
        radial-gradient(circle 3px at 32% 20%, rgba(94,158,110,0.35) 0%, transparent 100%),
        radial-gradient(circle 6px at 45% 50%, rgba(94,158,110,0.2) 0%, transparent 100%),
        radial-gradient(circle 4px at 58% 30%, rgba(94,158,110,0.28) 0%, transparent 100%),
        radial-gradient(circle 5px at 72% 65%, rgba(94,158,110,0.22) 0%, transparent 100%),
        radial-gradient(circle 3px at 85% 40%, rgba(94,158,110,0.32) 0%, transparent 100%),
        radial-gradient(circle 4px at 22% 75%, rgba(94,158,110,0.26) 0%, transparent 100%),
        radial-gradient(circle 5px at 65% 85%, rgba(94,158,110,0.2) 0%, transparent 100%),
        radial-gradient(circle 3px at 40% 10%, rgba(94,158,110,0.3) 0%, transparent 100%);
}

.fog-sparse-bright {
    background:
        radial-gradient(circle 5px at 25% 30%, rgba(168,213,184,0.2) 0%, transparent 100%),
        radial-gradient(circle 6px at 60% 50%, rgba(168,213,184,0.25) 0%, transparent 100%),
        radial-gradient(circle 4px at 80% 25%, rgba(168,213,184,0.3) 0%, transparent 100%),
        radial-gradient(circle 7px at 40% 75%, rgba(168,213,184,0.15) 0%, transparent 100%);
}

.fog-final {
    background:
        radial-gradient(circle 5px at 30% 40%, rgba(94,158,110,0.15) 0%, transparent 100%),
        radial-gradient(circle 4px at 65% 55%, rgba(94,158,110,0.12) 0%, transparent 100%),
        radial-gradient(circle 6px at 50% 30%, rgba(94,158,110,0.1) 0%, transparent 100%);
}

/* Responsive */
@media (max-width: 768px) {
    .content-column {
        width: 100%;
        padding: 0 24px;
    }

    .depth-gauge {
        display: none;
    }

    .card-flip-panel {
        width: 80vw;
    }
}

@media (prefers-reduced-motion: reduce) {
    .breathing {
        animation: none;
    }

    .scan-line {
        animation: none;
        display: none;
    }

    .temporal-ring {
        animation: none;
        opacity: 0.06;
    }

    .glyph-svg {
        animation: none;
    }

    .stratum-title, .body-text {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .card-container {
        transition: transform 0.5s ease;
    }
}