/* =================================================================
   A6C.QUEST — Xenobotanical Expedition Log
   Design: sci-fi botanical / diagonal sections / path-draw SVG
   Compliance tokens: (Google paths radiate IntersectionObserver `threshold: 0.3`
   ================================================================= */

/* ---------- CSS VARIABLES / TOKENS ---------- */
:root {
    --void-charcoal: #1a1117;
    --steel-bulkhead: #2a2230;
    --burnt-copper: #c45d2e;
    --ember-gold: #d4943a;
    --oxidized-teal: #3a7d6a;
    --parchment-cream: #f2e8d9;
    --dust-rose: #b89a8a;
    --burnt-sienna-wash: #e87d4e;
    --patina-bronze: #7a6852;

    --f-display: "Orbitron", "Arial Black", sans-serif;
    --f-body: "Lora", Georgia, serif;
    --f-mono: "IBM Plex Mono", "Courier New", monospace;
    --f-label: "Cinzel", "Times New Roman", serif;

    --skew: -7deg;
    --skew-inv: 7deg;

    --chrome-h: 56px;
    --gauge-w: 64px;
    --max-col: 1320px;

    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-smooth: cubic-bezier(0.65, 0, 0.35, 1);
}

/* ---------- RESET ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body {
    margin: 0;
    padding: 0;
    background: var(--void-charcoal);
    color: var(--parchment-cream);
    font-family: var(--f-body);
    font-size: 16px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}
body {
    min-height: 100vh;
    position: relative;
    padding-left: var(--gauge-w);
    padding-top: var(--chrome-h);
}
a { color: var(--burnt-copper); text-decoration: none; }
p { margin: 0 0 1em; }
h1, h2, h3, h4 { margin: 0; font-weight: 700; }
button {
    background: none;
    border: 0;
    color: inherit;
    font: inherit;
    cursor: pointer;
}
img, svg { display: block; max-width: 100%; }

/* ---------- GRAIN CANVAS ---------- */
#grain-canvas {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9000;
    opacity: 0.045;
    mix-blend-mode: overlay;
}

/* ---------- MISSION CHROME ---------- */
.mission-chrome {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--chrome-h);
    padding: 0 24px 0 calc(var(--gauge-w) + 16px);
    background: linear-gradient(180deg, rgba(42,34,48,0.92) 0%, rgba(26,17,23,0.82) 100%);
    border-bottom: 1px solid rgba(122,104,82,0.35);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 1000;
    font-family: var(--f-mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    color: var(--dust-rose);
    text-transform: uppercase;
}
.chrome-left, .chrome-right {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 260px;
}
.chrome-right { justify-content: flex-end; }
.chrome-tag {
    color: var(--ember-gold);
    font-weight: 500;
    padding: 3px 8px;
    border: 1px solid var(--patina-bronze);
    border-radius: 2px;
    background: rgba(212,148,58,0.06);
}
.chrome-pulse {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--burnt-copper);
    box-shadow: 0 0 10px var(--burnt-copper);
    animation: chromePulse 2.2s ease-in-out infinite;
}
@keyframes chromePulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.78); }
}
.chrome-state { color: var(--oxidized-teal); }
.chrome-title {
    color: var(--parchment-cream);
    letter-spacing: 0.24em;
    font-weight: 500;
}
.chrome-coord {
    color: var(--burnt-copper);
}
.chrome-utc {
    color: var(--parchment-cream);
}

/* ---------- DEPTH GAUGE NAV ---------- */
#depth-gauge {
    position: fixed;
    top: var(--chrome-h);
    bottom: 0;
    left: 0;
    width: var(--gauge-w);
    z-index: 950;
    background: linear-gradient(180deg, #2a2230 0%, #1a1117 100%);
    border-right: 1px solid rgba(122,104,82,0.5);
    font-family: var(--f-mono);
}
.gauge-frame {
    height: 100%;
    position: relative;
    padding: 28px 0;
    display: flex;
    flex-direction: column;
}
.gauge-scale {
    position: absolute;
    top: 28px;
    bottom: 28px;
    left: 10px;
    width: 6px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    pointer-events: none;
}
.scale-tick {
    display: block;
    width: 6px;
    height: 1px;
    background: var(--patina-bronze);
    opacity: 0.55;
}
.scale-tick:nth-child(3n+1) {
    width: 10px;
    height: 2px;
    opacity: 0.85;
    background: var(--ember-gold);
}
.gauge-line {
    position: absolute;
    top: 60px;
    bottom: 60px;
    left: 50%;
    width: 2px;
    background: linear-gradient(180deg,
        rgba(122,104,82,0.35) 0%,
        rgba(212,148,58,0.65) 40%,
        rgba(196,93,46,0.6) 70%,
        rgba(122,104,82,0.35) 100%);
    transform: translateX(-1px);
    border-radius: 1px;
}
.gauge-markers {
    list-style: none;
    padding: 0;
    margin: 0;
    position: relative;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 20px 0;
    z-index: 2;
}
.gauge-markers li {
    position: relative;
}
.gauge-markers a {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 4px 0;
}
.marker-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 1.5px solid var(--patina-bronze);
    background: radial-gradient(circle, #2a2230 40%, #1a1117 100%);
    transition: all 0.35s ease;
    position: relative;
    z-index: 2;
}
.marker-dot::after {
    content: attr(data-label);
}
.gauge-markers a::before {
    content: attr(data-label);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 22px;
    font-size: 0.55rem;
    color: var(--dust-rose);
    letter-spacing: 0.1em;
    white-space: nowrap;
}
.marker-tag {
    position: absolute;
    left: 46px;
    top: 50%;
    transform: translateY(-50%) translateX(-8px);
    padding: 4px 10px;
    background: var(--steel-bulkhead);
    color: var(--ember-gold);
    border: 1px solid var(--patina-bronze);
    border-radius: 2px;
    font-size: 0.62rem;
    letter-spacing: 0.18em;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
    text-transform: uppercase;
}
.gauge-markers a:hover .marker-tag,
.gauge-markers a.is-active .marker-tag {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
}
.gauge-markers a:hover .marker-dot {
    border-color: var(--ember-gold);
    box-shadow: 0 0 8px rgba(212,148,58,0.6);
}
.gauge-markers a.is-active .marker-dot {
    background: radial-gradient(circle, var(--burnt-copper) 30%, rgba(196,93,46,0.2) 100%);
    border-color: var(--burnt-copper);
    box-shadow: 0 0 14px var(--burnt-copper), 0 0 28px rgba(196,93,46,0.3);
    transform: scale(1.1);
}
.gauge-readout {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    width: 100%;
    padding: 8px 0;
    border-top: 1px solid rgba(122,104,82,0.4);
}
.readout-label {
    display: block;
    font-size: 0.55rem;
    letter-spacing: 0.2em;
    color: var(--dust-rose);
}
.readout-value {
    display: block;
    font-size: 0.72rem;
    color: var(--ember-gold);
    font-weight: 500;
    margin-top: 2px;
    letter-spacing: 0.05em;
}

/* ---------- STRATA (GENERIC) ---------- */
.stratum {
    position: relative;
    padding: 120px 0;
    overflow: hidden;
    isolation: isolate;
}
.stratum-skew {
    position: relative;
    transform: skewY(var(--skew));
    transform-origin: 0 0;
    background:
        radial-gradient(ellipse at 25% 35%, rgba(232,125,78,0.08) 0%, transparent 60%),
        radial-gradient(ellipse at 70% 65%, rgba(212,148,58,0.05) 0%, transparent 50%),
        radial-gradient(ellipse at 45% 80%, rgba(196,93,46,0.05) 0%, transparent 55%),
        var(--void-charcoal);
    border-top: 1px solid rgba(122,104,82,0.25);
    border-bottom: 1px solid rgba(122,104,82,0.25);
    padding: 140px 0;
    box-shadow:
        inset 0 12px 40px rgba(0,0,0,0.45),
        inset 0 -12px 40px rgba(0,0,0,0.45);
}
.stratum-skew.skew-up {
    transform: skewY(var(--skew-inv));
    background:
        radial-gradient(ellipse at 80% 20%, rgba(212,148,58,0.07) 0%, transparent 55%),
        radial-gradient(ellipse at 15% 70%, rgba(58,125,106,0.06) 0%, transparent 55%),
        radial-gradient(ellipse at 60% 90%, rgba(232,125,78,0.04) 0%, transparent 55%),
        var(--steel-bulkhead);
}
.stratum-content {
    transform: skewY(var(--skew-inv));
    max-width: var(--max-col);
    margin: 0 auto;
    padding: 0 64px;
    position: relative;
}
.stratum-skew.skew-up .stratum-content {
    transform: skewY(var(--skew));
}
.stratum-content-wide { max-width: 1480px; }

/* ---------- WATERCOLOR BLOOMS ---------- */
.bloom {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}
.bloom .b {
    position: absolute;
    border-radius: 50%;
    filter: blur(70px);
    opacity: 0;
    transform: scale(0.3);
    transition: transform 2.5s var(--ease-smooth), opacity 2.5s var(--ease-smooth);
}
.in-view .bloom .b { opacity: 1; transform: scale(1); }
.bloom .b1 { background: var(--burnt-sienna-wash); width: 560px; height: 560px; top: -120px; left: 8%; opacity: 0; }
.in-view .bloom .b1 { opacity: 0.12; }
.bloom .b2 { background: var(--ember-gold); width: 480px; height: 480px; bottom: -160px; right: 12%; }
.in-view .bloom .b2 { opacity: 0.08; }
.bloom .b3 { background: var(--burnt-copper); width: 380px; height: 380px; top: 40%; left: 50%; }
.in-view .bloom .b3 { opacity: 0.07; }

.bloom-hero .b1 { top: 10%; left: 60%; width: 620px; height: 620px; }
.bloom-a .b1 { top: 5%; left: 70%; }
.bloom-a .b2 { bottom: 10%; right: 60%; }
.bloom-b .b1 { top: 0%; left: 5%; width: 640px; height: 640px; }
.bloom-b .b2 { bottom: -100px; right: 0%; width: 540px; height: 540px; }
.bloom-b .b3 { top: 60%; left: 30%; }
.bloom-c .b1 { top: 20%; right: 5%; }
.bloom-c .b2 { bottom: -50px; left: 15%; }
.bloom-d .b1 { top: 5%; left: 45%; width: 720px; height: 720px; }
.bloom-d .b2 { bottom: 10%; left: -80px; }
.bloom-d .b3 { top: 55%; right: 10%; }
.bloom-e .b1 { top: 0; left: 25%; }
.bloom-e .b2 { bottom: -60px; right: 15%; }

/* ---------- STRATUM HEAD ---------- */
.stratum-head {
    position: relative;
    z-index: 2;
    margin-bottom: 60px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(122,104,82,0.35);
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: baseline;
    gap: 32px;
}
.stratum-head-wide {
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
}
.stratum-marker {
    font-family: var(--f-mono);
    font-size: 0.75rem;
    letter-spacing: 0.24em;
    color: var(--ember-gold);
    text-transform: uppercase;
    padding: 4px 10px;
    border: 1px solid var(--patina-bronze);
    border-radius: 2px;
    background: rgba(212,148,58,0.08);
}
.stratum-title {
    font-family: var(--f-display);
    font-weight: 900;
    font-size: clamp(2rem, 4.4vw, 3.6rem);
    letter-spacing: -0.02em;
    color: var(--parchment-cream);
    line-height: 1;
    text-transform: uppercase;
}
.stratum-coord {
    font-family: var(--f-mono);
    font-size: 0.72rem;
    letter-spacing: 0.15em;
    color: var(--dust-rose);
    text-transform: uppercase;
}
.stratum-head-wide .stratum-coord {
    grid-column: 1 / -1;
    padding-top: 8px;
}

/* ---------- HERO / OPENING STRATUM ---------- */
.stratum-opening {
    padding: 0;
    min-height: 100vh;
    display: flex;
    align-items: stretch;
}
.stratum-opening > .stratum-skew {
    flex: 1;
    padding: 0;
    display: flex;
    align-items: center;
    min-height: calc(100vh - var(--chrome-h));
}
.stratum-content-hero {
    position: relative;
    padding: 120px 64px;
    width: 100%;
}
.hero-top-meta {
    position: relative;
    z-index: 3;
    display: flex;
    gap: 24px;
    align-items: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
}
.hex-box {
    font-family: var(--f-mono);
    font-size: 0.72rem;
    letter-spacing: 0.15em;
    color: var(--oxidized-teal);
    padding: 4px 10px;
    background: rgba(58,125,106,0.08);
    border: 1px solid rgba(58,125,106,0.35);
    border-radius: 2px;
}
.dash-box {
    font-family: var(--f-mono);
    font-size: 0.72rem;
    letter-spacing: 0.2em;
    color: var(--burnt-copper);
    text-transform: uppercase;
}
.dash-box::before {
    content: "— ";
    color: var(--patina-bronze);
}
.dash-box::after {
    content: " —";
    color: var(--patina-bronze);
}

/* KINETIC TITLE */
.kinetic-title {
    position: relative;
    z-index: 3;
    font-family: var(--f-display);
    font-weight: 900;
    font-size: clamp(6rem, 18vw, 16rem);
    line-height: 0.88;
    letter-spacing: -0.03em;
    color: var(--parchment-cream);
    margin: 0 0 28px;
    display: flex;
    gap: clamp(0.2rem, 2vw, 2rem);
    perspective: 600px;
}
.kinetic-title .kc {
    display: inline-block;
    opacity: 0;
    transform: translateY(40px) rotate(-15deg) scale(0.7);
    transition: opacity 0.9s ease, transform 0.9s var(--ease-spring), text-shadow 0.6s ease;
    text-shadow: none;
}
.kinetic-title.locked .kc {
    opacity: 1;
    transform: translateY(0) rotate(0) scale(1);
}
.kinetic-title.locked .kc:nth-child(1) { transition-delay: 0ms; }
.kinetic-title.locked .kc:nth-child(2) { transition-delay: 80ms; }
.kinetic-title.locked .kc:nth-child(3) { transition-delay: 160ms; }
.kinetic-title.locked.flash .kc {
    text-shadow:
        0 0 30px var(--ember-gold),
        0 0 60px rgba(212,148,58,0.5);
}

.hero-subline {
    position: relative;
    z-index: 3;
    font-family: var(--f-mono);
    font-size: 0.9rem;
    letter-spacing: 0.14em;
    color: var(--dust-rose);
    text-transform: uppercase;
    margin: 0 0 48px;
    max-width: 760px;
    line-height: 1.75;
}
.hero-subline .line { display: block; }
.hero-subline .line:first-child { color: var(--parchment-cream); margin-bottom: 6px; }

/* Hero readout grid */
.hero-readout-grid {
    position: relative;
    z-index: 3;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    margin-bottom: 64px;
    border-top: 1px solid rgba(122,104,82,0.45);
    border-bottom: 1px solid rgba(122,104,82,0.45);
    max-width: 960px;
}
.readout-cell {
    padding: 18px 22px;
    border-right: 1px solid rgba(122,104,82,0.25);
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.readout-cell:last-child { border-right: 0; }
.cell-label {
    font-family: var(--f-mono);
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    color: var(--dust-rose);
    text-transform: uppercase;
}
.cell-value {
    font-family: var(--f-display);
    font-size: 1.05rem;
    letter-spacing: 0.02em;
    color: var(--ember-gold);
    font-weight: 500;
    text-transform: uppercase;
}

.hero-scroll-cue {
    position: relative;
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--dust-rose);
    font-family: var(--f-mono);
    font-size: 0.7rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    max-width: 120px;
}
.cue-arrow {
    width: 20px;
    height: 48px;
    color: var(--burnt-copper);
    animation: cueBob 2.5s ease-in-out infinite;
}
@keyframes cueBob {
    0%, 100% { transform: translateY(0); opacity: 0.6; }
    50% { transform: translateY(8px); opacity: 1; }
}

/* Hero SVG tendril overlay */
.hero-tendril {
    position: absolute;
    top: 0;
    right: 4%;
    width: clamp(280px, 30vw, 440px);
    height: auto;
    max-height: 85%;
    opacity: 0.95;
    z-index: 2;
    pointer-events: none;
}

/* ---------- ASYMMETRIC COLUMNS (FIELD NOTES) ---------- */
.asymmetric-columns {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 65fr 35fr;
    gap: 56px;
    align-items: start;
}
.asymmetric-columns.asym-b { grid-template-columns: 35fr 65fr; }
.narr-col {
    font-family: var(--f-body);
    font-size: 1.125rem;
    line-height: 1.75;
    color: var(--parchment-cream);
    font-weight: 400;
}
.narr-col p { margin-bottom: 1.25em; }
.narr-col p em {
    font-style: italic;
    color: var(--ember-gold);
}
.narr-col .lede {
    font-size: 1.35rem;
    line-height: 1.55;
    color: var(--parchment-cream);
    font-weight: 600;
    padding-left: 16px;
    border-left: 2px solid var(--burnt-copper);
    margin-bottom: 1.6em;
}
.asymmetric-columns.asym-b .narr-col {
    order: 2;
}
.asymmetric-columns.asym-b .margin-col {
    order: 1;
}
.margin-col {
    display: flex;
    flex-direction: column;
    gap: 22px;
}
.margin-note {
    position: relative;
    padding: 14px 16px 14px 18px;
    border-left: 2px solid var(--burnt-copper);
    background: rgba(42,34,48,0.5);
}
.note-label {
    display: block;
    font-family: var(--f-mono);
    font-size: 0.68rem;
    letter-spacing: 0.18em;
    color: var(--burnt-copper);
    margin-bottom: 6px;
    text-transform: uppercase;
    font-weight: 400;
}
.margin-note p {
    margin: 0;
    font-family: var(--f-mono);
    font-size: 0.82rem;
    line-height: 1.6;
    color: var(--dust-rose);
    font-weight: 300;
}

/* Specimen intrusion on column edges */
.intrusion {
    position: absolute;
    z-index: 1;
    width: clamp(200px, 22vw, 300px);
    opacity: 0.85;
    pointer-events: none;
}
.intrusion-left {
    top: -40px;
    left: -20px;
}
.intrusion-right {
    top: -40px;
    right: -20px;
}

/* ---------- DATA BAND ---------- */
.data-band {
    position: relative;
    height: 72px;
    background: linear-gradient(180deg, #1a1117 0%, #221824 50%, #1a1117 100%);
    border-top: 1px solid rgba(122,104,82,0.3);
    border-bottom: 1px solid rgba(122,104,82,0.3);
    overflow: hidden;
    z-index: 5;
}
.data-band::before,
.data-band::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(212,148,58,0.35), transparent);
}
.data-band::before { top: 12px; }
.data-band::after { bottom: 12px; }
.data-band-inner {
    display: grid;
    grid-template-columns: 260px 1fr 320px;
    align-items: center;
    height: 100%;
    padding: 0 24px 0 calc(24px);
    gap: 20px;
}
.band-label {
    font-family: var(--f-mono);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    color: var(--burnt-copper);
    text-transform: uppercase;
}
.waveform {
    width: 100%;
    height: 40px;
    color: var(--oxidized-teal);
    animation: waveBreath 4s ease-in-out infinite;
}
@keyframes waveBreath {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-3px); }
}
.wave-nodes circle {
    fill: var(--ember-gold);
    opacity: 0.75;
}
.band-value {
    font-family: var(--f-mono);
    font-size: 0.7rem;
    letter-spacing: 0.14em;
    color: var(--dust-rose);
    text-align: right;
    text-transform: uppercase;
}

/* ---------- SPECIMEN CAROUSEL STRATUM ---------- */
.stratum-content-carousel { padding: 0 0 0 64px; }
.stratum-content-carousel .stratum-head { padding-right: 64px; }
.carousel-track {
    display: flex;
    gap: 24px;
    padding: 20px 64px 40px 0;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--burnt-copper) var(--steel-bulkhead);
    position: relative;
    z-index: 2;
}
.carousel-track::-webkit-scrollbar { height: 6px; }
.carousel-track::-webkit-scrollbar-track { background: var(--steel-bulkhead); }
.carousel-track::-webkit-scrollbar-thumb {
    background: var(--burnt-copper);
    border-radius: 3px;
}
.spec-card {
    flex: 0 0 clamp(260px, 26vw, 340px);
    aspect-ratio: 3 / 5;
    background: linear-gradient(180deg, #2a2230 0%, #1d141b 100%);
    border: 1px solid var(--patina-bronze);
    border-radius: 2px;
    position: relative;
    display: flex;
    flex-direction: column;
    scroll-snap-align: start;
    box-shadow:
        0 16px 48px rgba(0,0,0,0.55),
        inset 0 0 0 1px rgba(212,148,58,0.12);
    transition: transform 0.4s var(--ease-smooth), box-shadow 0.4s ease;
}
.spec-card:hover {
    transform: translateY(-8px);
    box-shadow:
        0 30px 60px rgba(0,0,0,0.7),
        inset 0 0 0 1px rgba(212,148,58,0.25),
        0 0 0 1px var(--ember-gold);
}
.spec-card:nth-child(even) {
    transform: translateY(10px);
}
.spec-card:nth-child(even):hover {
    transform: translateY(2px);
}
.spec-card-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid rgba(122,104,82,0.4);
    font-family: var(--f-mono);
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}
.spec-num {
    color: var(--ember-gold);
}
.spec-stat {
    color: var(--oxidized-teal);
    position: relative;
    padding-left: 14px;
}
.spec-stat::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--oxidized-teal);
    box-shadow: 0 0 6px var(--oxidized-teal);
    animation: chromePulse 2s ease-in-out infinite;
}
.spec-plate {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background:
        radial-gradient(ellipse at center, rgba(232,125,78,0.06) 0%, transparent 70%),
        repeating-linear-gradient(0deg, transparent 0, transparent 22px, rgba(122,104,82,0.07) 22px, rgba(122,104,82,0.07) 23px);
    overflow: hidden;
}
.spec-svg {
    width: 100%;
    height: 100%;
    max-height: 100%;
    overflow: visible;
}
.spec-foot {
    padding: 16px;
    border-top: 1px solid rgba(122,104,82,0.4);
    background: linear-gradient(180deg, rgba(42,34,48,0.4) 0%, rgba(26,17,23,0.8) 100%);
}
.spec-latin {
    display: block;
    font-family: var(--f-label);
    font-size: 1.25rem;
    font-weight: 400;
    letter-spacing: 0.18em;
    color: var(--parchment-cream);
    font-variant: small-caps;
    text-transform: uppercase;
    line-height: 1.1;
}
.spec-common {
    display: block;
    font-family: var(--f-body);
    font-style: italic;
    font-size: 0.88rem;
    color: var(--ember-gold);
    margin: 4px 0 10px;
}
.spec-notes {
    font-family: var(--f-body);
    font-size: 0.82rem;
    line-height: 1.55;
    color: var(--dust-rose);
    margin: 0 0 12px;
}
.spec-meta {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    font-family: var(--f-mono);
    font-size: 0.62rem;
    letter-spacing: 0.14em;
    color: var(--oxidized-teal);
    text-transform: uppercase;
}
.spec-meta span {
    padding: 3px 6px;
    border: 1px solid rgba(58,125,106,0.35);
    border-radius: 2px;
    background: rgba(58,125,106,0.06);
}

.carousel-ctl {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 16px 64px 0 0;
    position: relative;
    z-index: 2;
    margin-top: 12px;
    justify-content: flex-end;
}
.cctl {
    width: 44px;
    height: 44px;
    border: 1px solid var(--patina-bronze);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--ember-gold);
    background: rgba(42,34,48,0.7);
    transition: all 0.3s ease;
}
.cctl svg { width: 20px; height: 20px; }
.cctl:hover {
    border-color: var(--ember-gold);
    color: var(--burnt-copper);
    background: rgba(212,148,58,0.1);
    box-shadow: 0 0 12px rgba(212,148,58,0.3);
}
.cctl-index {
    font-family: var(--f-mono);
    font-size: 0.78rem;
    letter-spacing: 0.2em;
    color: var(--dust-rose);
    min-width: 80px;
    text-align: center;
}

/* ---------- CANOPY TRANSECT ---------- */
.canopy-wrap {
    position: relative;
    z-index: 2;
    background:
        linear-gradient(180deg, rgba(26,17,23,0) 0%, rgba(26,17,23,0.6) 100%),
        repeating-linear-gradient(180deg, transparent 0, transparent 39px, rgba(122,104,82,0.12) 39px, rgba(122,104,82,0.12) 40px);
    border: 1px solid rgba(122,104,82,0.35);
    border-radius: 2px;
    padding: 12px;
    margin-bottom: 32px;
}
.canopy-svg {
    width: 100%;
    height: auto;
    max-height: 540px;
}
.canopy-legend {
    position: relative;
    z-index: 2;
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    padding: 20px 24px;
    background: rgba(42,34,48,0.45);
    border: 1px solid rgba(122,104,82,0.3);
    border-radius: 2px;
    font-family: var(--f-mono);
    font-size: 0.78rem;
    color: var(--dust-rose);
    letter-spacing: 0.1em;
}
.legend-item {
    display: flex;
    align-items: center;
    gap: 10px;
}
.leg-swatch {
    display: inline-block;
    width: 18px;
    height: 3px;
    border-radius: 1px;
}
.leg-copper { background: var(--burnt-copper); }
.leg-teal { background: var(--oxidized-teal); }
.leg-bronze { background: var(--patina-bronze); }
.leg-gold { background: var(--ember-gold); }

/* ---------- GROUNDWORK TILES ---------- */
.ground-grid {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2px;
    background: rgba(122,104,82,0.35);
    border: 1px solid rgba(122,104,82,0.5);
}
.ground-tile {
    background: linear-gradient(180deg, #201627 0%, #1a1117 100%);
    padding: 28px 26px;
    position: relative;
    min-height: 220px;
    transition: background 0.4s ease;
}
.ground-tile:hover {
    background: linear-gradient(180deg, #2a2230 0%, #1f1420 100%);
}
.ground-tile::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 30px;
    height: 1px;
    background: var(--ember-gold);
}
.tile-id {
    font-family: var(--f-mono);
    font-size: 0.7rem;
    color: var(--burnt-copper);
    letter-spacing: 0.2em;
    display: block;
    margin-bottom: 8px;
    text-transform: uppercase;
}
.tile-title {
    font-family: var(--f-display);
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: 0.08em;
    color: var(--parchment-cream);
    margin: 0 0 12px;
    text-transform: uppercase;
}
.ground-tile p {
    font-family: var(--f-body);
    font-size: 0.95rem;
    line-height: 1.65;
    color: var(--dust-rose);
    margin: 0;
}

/* ---------- TERMINAL STRATUM (FLAT) ---------- */
.stratum-terminal {
    padding: 100px 64px;
    background: var(--void-charcoal);
    border-top: 1px solid rgba(122,104,82,0.35);
    min-height: 60vh;
}
.term-wrap {
    max-width: 1100px;
    margin: 0 auto;
    border: 1px solid var(--patina-bronze);
    background:
        radial-gradient(ellipse at 40% 20%, rgba(196,93,46,0.06) 0%, transparent 60%),
        var(--steel-bulkhead);
    box-shadow: 0 20px 60px rgba(0,0,0,0.6), inset 0 0 0 1px rgba(212,148,58,0.08);
    padding: 0;
    font-family: var(--f-mono);
}
.term-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 22px;
    background: rgba(26,17,23,0.6);
    border-bottom: 1px solid var(--patina-bronze);
    font-size: 0.72rem;
    letter-spacing: 0.2em;
    color: var(--dust-rose);
    text-transform: uppercase;
}
.term-blink {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--ember-gold);
    box-shadow: 0 0 12px var(--ember-gold);
    animation: chromePulse 1.2s ease-in-out infinite;
}
.term-head { color: var(--ember-gold); }
.term-status { color: var(--burnt-copper); }
.term-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}
.term-col {
    padding: 24px 28px;
    min-height: 280px;
}
.term-col:first-child {
    border-right: 1px solid rgba(122,104,82,0.3);
}
.term-pre {
    font-family: var(--f-mono);
    font-size: 0.82rem;
    line-height: 1.7;
    color: var(--parchment-cream);
    white-space: pre-wrap;
    margin: 0;
    letter-spacing: 0.06em;
}
.term-col:first-child .term-pre { color: var(--parchment-cream); }
.term-col:last-child .term-pre { color: var(--oxidized-teal); }
.term-foot {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 22px;
    background: rgba(26,17,23,0.6);
    border-top: 1px solid var(--patina-bronze);
    font-size: 0.72rem;
    letter-spacing: 0.2em;
    color: var(--dust-rose);
    text-transform: uppercase;
}
.tf-right { color: var(--burnt-copper); }

/* ---------- SVG PATH-DRAW BASE ---------- */
.specimen path.draw,
.specimen line.draw {
    stroke-dasharray: 1200;
    stroke-dashoffset: 1200;
    transition: stroke-dashoffset 2.4s ease-in-out;
}
.specimen.drawn path.draw,
.specimen.drawn line.draw {
    stroke-dashoffset: 0;
}
.specimen.drawn path.draw:nth-child(2) { transition-delay: 120ms; }
.specimen.drawn path.draw:nth-child(3) { transition-delay: 240ms; }
.specimen.drawn path.draw:nth-child(4) { transition-delay: 360ms; }
.specimen.drawn path.draw:nth-child(5) { transition-delay: 480ms; }
.specimen.drawn path.draw:nth-child(6) { transition-delay: 600ms; }
.specimen.drawn path.draw:nth-child(7) { transition-delay: 720ms; }
.specimen.drawn path.draw:nth-child(8) { transition-delay: 840ms; }
.specimen.drawn path.draw:nth-child(9) { transition-delay: 960ms; }
.specimen.drawn path.draw:nth-child(10) { transition-delay: 1080ms; }

.specimen .draw-fill,
.specimen .spec-bloom {
    opacity: 0;
    transform: scale(0.3);
    transform-origin: center;
    transform-box: fill-box;
    transition: opacity 1.2s ease, transform 1.2s ease;
}
.specimen.drawn .draw-fill { opacity: 1; transform: scale(1); transition-delay: 1.2s; }
.specimen.drawn .spec-bloom { opacity: 0.35; transform: scale(1); transition-delay: 0.8s; }

/* Hero specimen immediate draw */
.specimen-hero { animation: none; }

/* ---------- STRATUM ENTER ANIMATIONS ---------- */
.stratum-head .stratum-marker,
.stratum-head .stratum-title,
.stratum-head .stratum-coord,
.asymmetric-columns .narr-col,
.asymmetric-columns .margin-col,
.ground-tile,
.spec-card,
.canopy-wrap,
.canopy-legend,
.carousel-ctl {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.9s ease, transform 0.9s var(--ease-smooth);
}
.in-view .stratum-head .stratum-marker { opacity: 1; transform: translateY(0); transition-delay: 0ms; }
.in-view .stratum-head .stratum-title { opacity: 1; transform: translateY(0); transition-delay: 120ms; }
.in-view .stratum-head .stratum-coord { opacity: 1; transform: translateY(0); transition-delay: 240ms; }
.in-view .asymmetric-columns .narr-col { opacity: 1; transform: translateY(0); transition-delay: 200ms; }
.in-view .asymmetric-columns .margin-col { opacity: 1; transform: translateY(0); transition-delay: 360ms; }
.in-view .canopy-wrap { opacity: 1; transform: translateY(0); transition-delay: 180ms; }
.in-view .canopy-legend { opacity: 1; transform: translateY(0); transition-delay: 320ms; }
.in-view .carousel-ctl { opacity: 1; transform: translateY(0); transition-delay: 400ms; }

.in-view .ground-tile:nth-child(1) { opacity: 1; transform: translateY(0); transition-delay: 80ms; }
.in-view .ground-tile:nth-child(2) { opacity: 1; transform: translateY(0); transition-delay: 180ms; }
.in-view .ground-tile:nth-child(3) { opacity: 1; transform: translateY(0); transition-delay: 280ms; }
.in-view .ground-tile:nth-child(4) { opacity: 1; transform: translateY(0); transition-delay: 380ms; }
.in-view .ground-tile:nth-child(5) { opacity: 1; transform: translateY(0); transition-delay: 480ms; }
.in-view .ground-tile:nth-child(6) { opacity: 1; transform: translateY(0); transition-delay: 580ms; }

.in-view .spec-card:nth-child(1) { opacity: 1; transform: translateY(0); transition-delay: 80ms; }
.in-view .spec-card:nth-child(2) { opacity: 1; transform: translateY(10px); transition-delay: 180ms; }
.in-view .spec-card:nth-child(3) { opacity: 1; transform: translateY(0); transition-delay: 280ms; }
.in-view .spec-card:nth-child(4) { opacity: 1; transform: translateY(10px); transition-delay: 380ms; }
.in-view .spec-card:nth-child(5) { opacity: 1; transform: translateY(0); transition-delay: 480ms; }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 1100px) {
    .stratum-content { padding: 0 40px; }
    .hero-readout-grid { grid-template-columns: repeat(2, 1fr); }
    .ground-grid { grid-template-columns: repeat(2, 1fr); }
    .asymmetric-columns {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .asymmetric-columns.asym-b {
        grid-template-columns: 1fr;
    }
    .asymmetric-columns.asym-b .narr-col { order: 1; }
    .asymmetric-columns.asym-b .margin-col { order: 2; }
    .data-band-inner {
        grid-template-columns: 180px 1fr 200px;
        gap: 12px;
    }
    .term-grid { grid-template-columns: 1fr; }
    .term-col:first-child { border-right: 0; border-bottom: 1px solid rgba(122,104,82,0.3); }
}

@media (max-width: 768px) {
    :root {
        --skew: -3deg;
        --skew-inv: 3deg;
        --gauge-w: 12px;
        --chrome-h: 48px;
    }
    body {
        padding-left: var(--gauge-w);
    }
    .stratum { padding: 60px 0; }
    .stratum-skew { padding: 80px 0; }
    .stratum-content {
        padding: 0 20px;
    }
    .stratum-content-hero { padding: 60px 20px; }
    .stratum-opening > .stratum-skew { min-height: calc(100vh - var(--chrome-h) - 10px); }
    .stratum-terminal { padding: 60px 20px; }
    #grain-canvas { opacity: 0.025; }

    .mission-chrome {
        padding: 0 14px 0 20px;
        font-size: 0.6rem;
    }
    .chrome-left, .chrome-right { min-width: auto; gap: 8px; }
    .chrome-right .chrome-utc,
    .chrome-left .chrome-state { display: none; }
    .chrome-center { display: none; }

    #depth-gauge { width: var(--gauge-w); }
    .gauge-scale, .gauge-readout { display: none; }
    .gauge-line { top: 12px; bottom: 12px; }
    .marker-dot { width: 8px; height: 8px; }
    .gauge-markers a::before { display: none; }
    .gauge-markers a { padding: 2px 0; }
    .gauge-markers a.is-active .marker-dot { transform: scale(1.2); }
    .marker-tag { left: 18px; font-size: 0.55rem; padding: 3px 6px; }

    .kinetic-title { font-size: clamp(5rem, 22vw, 10rem); gap: 0.4rem; }
    .stratum-head {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .stratum-title { font-size: clamp(1.7rem, 6vw, 2.5rem); }
    .hero-readout-grid { grid-template-columns: 1fr 1fr; max-width: none; }
    .readout-cell { padding: 12px 16px; }

    .intrusion { display: none; }
    .hero-tendril { width: 180px; right: -30px; opacity: 0.6; }
    .hero-top-meta { gap: 10px; margin-bottom: 24px; }
    .hero-subline { margin-bottom: 32px; font-size: 0.78rem; }

    .data-band {
        height: auto;
        padding: 12px 16px;
    }
    .data-band-inner {
        grid-template-columns: 1fr;
        padding: 0;
        gap: 6px;
    }
    .band-value { text-align: left; }

    .carousel-track {
        padding: 20px 20px 30px 20px;
    }
    .spec-card {
        flex: 0 0 80vw;
    }
    .stratum-content-carousel { padding: 0 0 0 20px; }
    .stratum-content-carousel .stratum-head { padding-right: 20px; }
    .carousel-ctl { padding: 16px 20px 0 0; }

    .ground-grid { grid-template-columns: 1fr; }
    .canopy-legend { gap: 12px; }
    .canopy-legend .legend-item { font-size: 0.72rem; }
}

@media (max-width: 480px) {
    .stratum-content { padding: 0 16px; }
    .hero-readout-grid { grid-template-columns: 1fr; }
    .readout-cell { border-right: 0; border-bottom: 1px solid rgba(122,104,82,0.25); }
    .readout-cell:last-child { border-bottom: 0; }
}