/* ═══════════════════════════════════════════════════════════════
   UNDERGRADUATE PROJECTS — PRESENTATION STYLES
   Colours and type mirror ../style.css so the deck feels like the
   rest of the lab site. Category colours are used consistently:
   sky = computational project, teal = lab project,
   violet = dissertation, rose = patients / disease variants.
   ═══════════════════════════════════════════════════════════════ */

@property --sweep { syntax: '<angle>'; inherits: false; initial-value: 0deg; }
@property --hand  { syntax: '<angle>'; inherits: false; initial-value: 0deg; }

/* Dark theme (night): the original look. Also the fallback without JavaScript. */
:root,
[data-theme="dark"] {
    color-scheme: dark;
    --bg: #060a14;
    --surface: #0c1220;
    --surface-2: #151d2e;
    --line: rgba(148, 163, 184, 0.14);
    --line-strong: rgba(148, 163, 184, 0.32);
    --text-muted: #8a96a8;
    --text: #c8d2df;
    --text-strong: #eef1f6;
    --accent: #d4a040;            /* time: clock hands, sweeps, highlights */
    --accent-soft: #e8c36e;
    --accent-wash: rgba(212, 160, 64, 0.12);
    --c-comp: #7fb4ff;            /* computational project */
    --c-lab: #5ed6c0;             /* lab project */
    --c-diss: #b8a2ff;            /* dissertation */
    --c-rose: #ff8a9a;            /* patients, disease variants */
    --warn: #d4a040;              /* talk timer near the end */

    --bg-rgb: 6, 10, 20;
    --surface-rgb: 12, 18, 32;
    --surface-2-rgb: 21, 29, 46;
    --ink-rgb: 148, 163, 184;     /* neutral lines */
    --fill-rgb: 200, 210, 223;    /* neutral fills */
    --accent-rgb: 212, 160, 64;
    --accent-soft-rgb: 232, 195, 110;
    --comp-rgb: 127, 180, 255;
    --lab-rgb: 94, 214, 192;
    --diss-rgb: 184, 162, 255;
    --rose-rgb: 255, 138, 154;
    --sun-rgb: 212, 160, 64;
    --moon-rgb: 127, 180, 255;

    --scrim: rgba(3, 6, 12, 0.62);
    --panel-shadow: -30px 0 80px rgba(0, 0, 0, 0.45);
    --node-bg: #0f1a2d;
    --node-bg-busy: #17294a;
    --water-top: #173a52;
    --water-bottom: #060d18;
    --nightshade: #02040a;
    --nightshade-max: 0.75;
    --daphnia-rgb: 200, 220, 235;
    --daphnia-body: rgba(200, 220, 235, 0.14);
    --lark: #e8c36e;
    --owl: #b8a2ff;
    --body-weight: 300;
    --display-weight: 300;
}

/* Light theme (day): clinical blue on white */
[data-theme="light"] {
    color-scheme: light;
    --bg: #ffffff;
    --surface: #f6f9fd;
    --surface-2: #e9f1fa;
    --line: rgba(10, 37, 64, 0.12);
    --line-strong: rgba(10, 37, 64, 0.26);
    --text-muted: #56697f;
    --text: #2f4560;
    --text-strong: #0a2540;
    --accent: #0a5cb8;
    --accent-soft: #1f6fd1;
    --accent-wash: rgba(10, 92, 184, 0.09);
    --c-comp: #2b77e3;
    --c-lab: #0a8f7a;
    --c-diss: #7d44c8;
    --c-rose: #cf3a58;
    --warn: #b25e00;

    --bg-rgb: 255, 255, 255;
    --surface-rgb: 255, 255, 255;
    --surface-2-rgb: 233, 241, 250;
    --ink-rgb: 10, 37, 64;
    --fill-rgb: 10, 37, 64;
    --accent-rgb: 10, 92, 184;
    --accent-soft-rgb: 31, 111, 209;
    --comp-rgb: 43, 119, 227;
    --lab-rgb: 10, 143, 122;
    --diss-rgb: 125, 68, 200;
    --rose-rgb: 207, 58, 88;
    --sun-rgb: 47, 125, 214;
    --moon-rgb: 10, 37, 64;

    --scrim: rgba(10, 37, 64, 0.32);
    --panel-shadow: -24px 0 60px rgba(10, 37, 64, 0.16);
    --node-bg: #ffffff;
    --node-bg-busy: #e3eefb;
    --water-top: #d9eaf9;
    --water-bottom: #7fa9d6;
    --nightshade: #0a2540;
    --nightshade-max: 0.6;
    --daphnia-rgb: 18, 48, 82;
    --daphnia-body: rgba(255, 255, 255, 0.6);
    --lark: #e0a21a;
    --owl: #7d44c8;
    --body-weight: 350;
    --display-weight: 400;
}

:root {
    --serif: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
    --sans: 'Outfit', system-ui, -apple-system, 'Segoe UI', sans-serif;
    --mono: ui-monospace, 'SFMono-Regular', Menlo, Consolas, monospace;
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
    --swing: cubic-bezier(0.62, 0.04, 0.3, 1);
    --wipe-ms: 950ms;

    --fs-display: clamp(2.7rem, 7.4vmin + 1rem, 8rem);
    --fs-h2: clamp(1.95rem, 3.4vmin + 1rem, 4.3rem);
    --fs-h2-long: clamp(1.6rem, 2.35vmin + 0.85rem, 3.1rem);
    --fs-lead: clamp(1.04rem, 1.1vmin + 0.72rem, 1.62rem);
    --fs-body: clamp(0.96rem, 0.62vmin + 0.72rem, 1.22rem);
    --fs-small: clamp(0.84rem, 0.45vmin + 0.68rem, 1.06rem);

    --pad-x: clamp(1.25rem, 5vw, 6.5rem);
    --pad-top: clamp(4.4rem, 10vh, 7.5rem);
    --pad-bottom: clamp(4.6rem, 10vh, 7rem);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
    font-family: var(--sans);
    font-weight: var(--body-weight);
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
.js body { overflow: hidden; }
img, svg { display: block; }
a { color: inherit; }
button { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.sr-only {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
kbd {
    font-family: var(--sans); font-size: 0.9em; font-weight: 400;
    padding: 0.05em 0.45em; border: 1px solid var(--line-strong);
    border-bottom-width: 2px; border-radius: 4px; color: var(--text-strong);
}

/* ─── Persistent chrome ─────────────────────────────────────── */
.chrome {
    position: fixed; top: 0; left: 0; right: 0; z-index: 20;
    display: flex; justify-content: space-between; align-items: center;
    padding: 0.9rem var(--pad-x) 0;
    pointer-events: none;
}
.chrome > * { pointer-events: auto; }
.brand {
    font-family: var(--serif); font-weight: 500; font-size: 1.12rem;
    color: var(--accent); text-decoration: none; letter-spacing: 0.01em;
    display: flex; align-items: baseline; gap: 0.7rem;
}
.brand span { font-family: var(--sans); font-weight: 300; font-size: 0.8rem; color: var(--text-muted); }
.chrome-tools { display: flex; align-items: center; gap: 0.35rem; }
.icon-btn {
    width: 44px; height: 44px; border-radius: 50%;
    display: grid; place-items: center;
    background: transparent; border: 1px solid transparent;
    color: var(--text-muted); cursor: pointer;
    transition: color 0.25s, border-color 0.25s, background 0.25s;
}
.icon-btn:hover { color: var(--accent); border-color: var(--line); background: rgba(var(--surface-rgb), 0.6); }
.icon-btn svg { width: 20px; height: 20px; }
.dial-btn { width: 52px; height: 52px; }
.dial-btn svg { width: 46px; height: 46px; }
.md-ring { fill: none; stroke: var(--line-strong); stroke-width: 1; }
.md-dot { fill: var(--text-muted); opacity: 0.55; transition: fill 0.3s, opacity 0.3s; }
.md-dot.is-past { fill: var(--accent); opacity: 0.8; }
.md-dot.is-now { fill: var(--accent-soft); opacity: 1; }
.md-hand { stroke: var(--accent); stroke-width: 1.6; stroke-linecap: round; transition: transform 0.9s var(--swing); }
.md-hub { fill: var(--accent); }
.timer {
    font-variant-numeric: tabular-nums; font-size: 0.92rem; color: var(--text-muted);
    padding: 0 0.4rem; min-width: 3.2em; text-align: right;
}
.timer.is-late { color: var(--warn); }
.timer.is-over { color: var(--c-rose); }

/* ─── Deck and scenes ───────────────────────────────────────── */
.deck { position: fixed; inset: 0; overflow: hidden; }
.scene {
    position: absolute; inset: 0;
    padding: var(--pad-top) var(--pad-x) var(--pad-bottom);
    visibility: hidden; opacity: 0;
    overflow: hidden;
    touch-action: pan-y;
    background:
        radial-gradient(circle 62vmax at var(--sun-x, 50%) var(--sun-y, 115%), rgba(var(--sun-rgb), var(--sun-a, 0)), transparent 72%),
        radial-gradient(circle 46vmax at var(--moon-x, 75%) var(--moon-y, 6%), rgba(var(--moon-rgb), var(--moon-a, 0)), transparent 72%),
        var(--bg);
}
.scene.is-active { visibility: visible; opacity: 1; z-index: 1; }
.scene.is-leaving {
    visibility: visible; opacity: 1; z-index: 2;
    animation: scene-recede var(--wipe-ms) ease-in both;
}
.scene.is-entering {
    visibility: visible; opacity: 1; z-index: 3;
    -webkit-mask-image: conic-gradient(from 0deg at 50% 50%, #000 calc(var(--sweep) - 16deg), transparent var(--sweep));
            mask-image: conic-gradient(from 0deg at 50% 50%, #000 calc(var(--sweep) - 16deg), transparent var(--sweep));
    animation: scene-wipe var(--wipe-ms) var(--swing) both;
}
.scene.is-entering.is-reverse {
    -webkit-mask-image: conic-gradient(from 0deg at 50% 50%, transparent calc(360deg - var(--sweep)), #000 calc(376deg - var(--sweep)));
            mask-image: conic-gradient(from 0deg at 50% 50%, transparent calc(360deg - var(--sweep)), #000 calc(376deg - var(--sweep)));
}
@keyframes scene-wipe { from { --sweep: 0deg; } to { --sweep: 376deg; } }
@keyframes scene-recede { to { transform: scale(0.965); opacity: 0.3; } }
@keyframes scene-fade { from { opacity: 0; } to { opacity: 1; } }

.no-sweep .scene.is-entering,
.reduce-motion .scene.is-entering {
    -webkit-mask-image: none; mask-image: none;
    animation: scene-fade 380ms ease both;
}
.reduce-motion .scene.is-leaving { animation: none; opacity: 0; transition: opacity 380ms ease; }

/* The clock hand that sweeps the next scene in */
.sweep-hand {
    position: fixed; left: 50%; top: calc(50% - 130vmax); z-index: 4;
    width: 2px; height: 130vmax; margin-left: -1px;
    transform-origin: 50% 100%;
    transform: rotate(var(--hand));
    background: linear-gradient(to top, rgba(var(--accent-soft-rgb), 0.95), rgba(var(--accent-soft-rgb), 0.35) 25%, transparent 60%);
    filter: drop-shadow(0 0 6px rgba(var(--accent-soft-rgb), 0.6));
    pointer-events: none; opacity: 0;
}
.sweep-hand.is-running { animation: hand-cw var(--wipe-ms) var(--swing) both; }
.sweep-hand.is-running.is-reverse { animation-name: hand-ccw; }
@keyframes hand-cw {
    0% { --hand: -8deg; opacity: 0; } 8% { opacity: 1; } 86% { opacity: 1; }
    100% { --hand: 368deg; opacity: 0; }
}
@keyframes hand-ccw {
    0% { --hand: 368deg; opacity: 0; } 8% { opacity: 1; } 86% { opacity: 1; }
    100% { --hand: -8deg; opacity: 0; }
}
.no-sweep .sweep-hand, .reduce-motion .sweep-hand { display: none; }

/* Light / dark switch (sun shows in dark mode, moon in light mode) */
.theme-btn { position: relative; }
.theme-btn svg {
    position: absolute; width: 20px; height: 20px;
    fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round;
    transition: opacity 0.4s var(--ease), transform 0.6s var(--ease);
}
[data-theme="dark"] .theme-btn .icon-moon,
[data-theme="light"] .theme-btn .icon-sun { opacity: 0; transform: rotate(-90deg) scale(0.6); }

/* Theme change sweeps in like a clock hand (browsers with view transitions) */
::view-transition-old(root),
::view-transition-new(root) { animation: none; mix-blend-mode: normal; }
html.theme-sweep::view-transition-new(root) {
    -webkit-mask-image: conic-gradient(from 0deg at var(--vt-x, 50%) var(--vt-y, 50%), #000 calc(var(--sweep) - 14deg), transparent var(--sweep));
            mask-image: conic-gradient(from 0deg at var(--vt-x, 50%) var(--vt-y, 50%), #000 calc(var(--sweep) - 14deg), transparent var(--sweep));
    animation: theme-sweep 0.9s var(--swing) both;
}
@keyframes theme-sweep { from { --sweep: 0deg; } to { --sweep: 374deg; } }
html.theme-fade, html.theme-fade *, html.theme-fade *::before, html.theme-fade *::after {
    transition: background-color 0.45s ease, color 0.45s ease, border-color 0.45s ease, fill 0.45s ease, stroke 0.45s ease !important;
}

/* Some images come in two versions */
[data-theme="dark"] .only-light,
[data-theme="light"] .only-dark,
html:not([data-theme]) .only-light { display: none !important; }

/* Pause CSS animations in scenes that are not on screen */
.js .scene:not(.is-active) * { animation-play-state: paused !important; }

/* ─── Shared scene layout ───────────────────────────────────── */
.scene-inner {
    height: 100%;
    display: grid;
    gap: clamp(1.5rem, 4.2vw, 5.5rem);
    align-items: center;
}
.layout-split .scene-inner { grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); }
.scene-text { max-width: 42rem; min-width: 0; }
.scene-visual {
    position: relative; min-width: 0; min-height: 0;
    height: 100%;
    display: flex; flex-direction: column; justify-content: center; gap: 0.9rem;
}
.vis {
    display: block; width: 100%; height: auto;
    max-height: calc(100vh - var(--pad-top) - var(--pad-bottom) - 3.5rem);
    overflow: visible;
}
.vis text { font-family: var(--sans); fill: var(--text); }

.kicker {
    font-family: var(--serif); font-style: italic; font-weight: 400;
    font-size: var(--fs-lead); color: var(--accent-soft);
    margin-bottom: 0.55rem;
}
.scene-title {
    font-family: var(--serif); font-weight: 400;
    font-size: var(--fs-h2); line-height: 1.04; letter-spacing: -0.012em;
    color: var(--text-strong);
    margin-bottom: 1.15rem;
    text-wrap: balance;
}
.scene-title.is-long { font-size: var(--fs-h2-long); line-height: 1.08; }
.lead {
    font-size: var(--fs-lead); line-height: 1.5; color: var(--text);
    max-width: 36ch; text-wrap: pretty;
}
.people { margin-top: 1.1rem; font-size: var(--fs-body); color: var(--text-muted); max-width: 40ch; }
.people strong { color: var(--text-strong); font-weight: 400; }

.chips { display: flex; flex-wrap: wrap; gap: 0.45rem; list-style: none; margin-bottom: 1.35rem; }
.chip {
    display: inline-flex; align-items: center; gap: 0.5em;
    font-size: var(--fs-small); line-height: 1.3; color: var(--text);
    padding: 0.3em 0.85em;
    border: 1px solid var(--line-strong); border-radius: 999px;
}
[data-cat="computational"] { --cat: var(--c-comp); }
[data-cat="lab"] { --cat: var(--c-lab); }
[data-cat="dissertation"] { --cat: var(--c-diss); }
.chip[data-cat] { border-color: color-mix(in srgb, var(--cat) 50%, transparent); }
.chip[data-cat]::before {
    content: ''; width: 0.55em; height: 0.55em; border-radius: 50%;
    background: var(--cat); flex-shrink: 0;
}

.actions { display: flex; align-items: center; flex-wrap: wrap; gap: 1rem 1.4rem; margin-top: 1.7rem; }
.btn {
    display: inline-flex; align-items: center; gap: 0.6em;
    padding: 0.72em 1.25em;
    font-size: var(--fs-body); font-weight: 400; letter-spacing: 0.01em;
    color: var(--accent-soft); background: transparent;
    border: 1px solid rgba(var(--accent-rgb), 0.45); border-radius: 6px;
    cursor: pointer; text-decoration: none;
    transition: background 0.25s, border-color 0.25s, color 0.25s;
}
.btn:hover { background: var(--accent-wash); border-color: var(--accent); color: var(--text-strong); }
.btn svg { width: 1.05em; height: 1.05em; }
.btn-quiet {
    background: none; border: none; padding: 0.3em 0;
    font-size: var(--fs-small); color: var(--text-muted); cursor: pointer;
    border-bottom: 1px solid var(--line-strong); border-radius: 0;
}
.btn-quiet:hover { color: var(--accent-soft); border-color: var(--accent); }

.gel-logo { height: 46px; width: auto; opacity: 0.92; }
.gel-mini { height: 38px; width: auto; opacity: 0.85; }
.gel-fallback {
    font-family: var(--sans); font-weight: 500; font-size: 0.95rem;
    color: var(--text-strong); letter-spacing: 0.01em;
}

.vis-caption { font-size: var(--fs-small); color: var(--text-muted); min-height: 1.6em; }
.vis-caption strong { color: var(--text-strong); font-weight: 400; }
.caption-stack { display: grid; }
.caption-stack > * { grid-area: 1 / 1; }

/* Step builds: [data-show-at="n"] appears from step n onwards,
   [data-step-only="n"] is visible only while on step n. */
.js [data-show-at] { opacity: 0; transform: translateY(10px); transition: opacity 0.6s var(--ease), transform 0.6s var(--ease); }
.js [data-show-at].is-shown { opacity: 1; transform: none; }
.js [data-step-only] { opacity: 0; visibility: hidden; transition: opacity 0.45s var(--ease), visibility 0s 0.45s; }
.js [data-step-only].is-current { opacity: 1; visibility: visible; transition: opacity 0.7s var(--ease) 0.2s, visibility 0s 0s; }

/* ─── Scene: title ──────────────────────────────────────────── */
.scene--start .scene-inner { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
.start-title {
    font-family: var(--serif); font-weight: var(--display-weight);
    font-size: var(--fs-display); line-height: 0.98; letter-spacing: -0.02em;
    color: var(--text-strong);
}
.start-title span { display: block; }
.start-title .yr { font-variant-numeric: oldstyle-nums; }
.start-sub { margin-top: 1.6rem; font-size: var(--fs-lead); color: var(--text); max-width: 30ch; }
.start-by { margin-top: 1.4rem; font-size: var(--fs-body); color: var(--text-muted); line-height: 1.55; }
.start-by strong { color: var(--text-strong); font-weight: 400; }
.qr {
    margin-top: clamp(1.4rem, 4vh, 2.6rem);
    display: inline-flex; align-items: center; gap: 1rem;
    text-decoration: none; color: var(--text-muted); font-size: var(--fs-small); line-height: 1.45;
}
.qr img {
    width: clamp(88px, 11vmin, 132px); height: auto;
    background: #fff; padding: 6px; border-radius: 6px;
    box-shadow: 0 0 0 1px var(--line);
}
.qr b { color: var(--accent-soft); font-weight: 400; }
.start-visual { align-items: center; }
.start-visual .vis { max-width: min(100%, 78vh); }
.hint {
    position: absolute; left: var(--pad-x); bottom: clamp(1.2rem, 3.5vh, 2.2rem);
    font-size: var(--fs-small); color: var(--text-muted);
}
.touch .hint .k-only { display: none; }
.hint .t-only { display: none; }
.touch .hint .t-only { display: inline; }

/* Helix clock */
.hc-ring { fill: none; stroke: rgba(var(--accent-rgb), 0.16); stroke-width: 1; }
.hc-ring-inner { stroke: rgba(var(--accent-rgb), 0.08); }
.hc-tick { stroke: var(--accent); stroke-width: 1.2; opacity: 0.3; }
.hc-tick.is-major { stroke-width: 2; opacity: 0.6; }
.hc-label { fill: var(--accent) !important; font-size: 15px; letter-spacing: 0.12em; text-anchor: middle; opacity: 0.55; }
.hc-strand { fill: none; stroke-width: 3; stroke-linecap: round; }
.hc-strand.s1 { stroke: var(--accent-soft); }
.hc-strand.s2 { stroke: var(--c-comp); }
.hc-strand.hc-back { opacity: 0.22; stroke-width: 2.2; }
.hc-strand.hc-front { opacity: 0.95; }
.hc-rung { stroke-width: 2.2; stroke-linecap: round; }
.hc-hand { stroke: var(--accent); stroke-width: 3; stroke-linecap: round; filter: drop-shadow(0 0 6px rgba(var(--accent-rgb), 0.7)); }
.hc-hand-tail { stroke: rgba(var(--accent-rgb), 0.5); stroke-width: 1.5; stroke-linecap: round; }
.hc-hub { fill: var(--accent); filter: drop-shadow(0 0 10px rgba(var(--accent-rgb), 0.8)); }

/* ─── Scene: menu dial ──────────────────────────────────────── */
.menu-inner { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1.2rem; }
.menu-stage { position: relative; width: min(64vh, 44vw); aspect-ratio: 1; }
.menu-dial { position: absolute; inset: 0; }
.menu-dial .mn-svg { width: 100%; height: 100%; overflow: visible; }
.mn-ring { fill: none; stroke: rgba(var(--accent-rgb), 0.22); stroke-width: 1.2; }
.mn-night { fill: rgba(var(--comp-rgb), 0.05); }
.mn-day { fill: rgba(var(--accent-rgb), 0.05); }
.mn-tick { stroke: var(--accent); opacity: 0.3; stroke-width: 1.2; }
.mn-tick.is-major { opacity: 0.6; stroke-width: 2; }
.mn-label { fill: var(--accent) !important; font-size: 14px; opacity: 0.55; text-anchor: middle; letter-spacing: 0.1em; }
.mn-hand line { stroke: var(--accent); stroke-width: 3; stroke-linecap: round; }
.mn-hand { filter: drop-shadow(0 0 6px rgba(var(--accent-rgb), 0.8)); }
.mn-hand-tip { fill: var(--accent-soft); }
.mn-dot { fill: var(--cat); opacity: 0; transition: opacity 0.4s; }
.mn-dot.is-shown { opacity: 1; }
.mn-spoke { stroke: var(--cat); stroke-width: 1; opacity: 0; transition: opacity 0.4s; stroke-dasharray: 3 4; }
.mn-spoke.is-shown { opacity: 0.55; }
.mn-sun { fill: var(--accent-soft); }
.mn-moon { fill: var(--c-comp); opacity: 0.85; }
.menu-center {
    position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
    width: 52%; text-align: center; pointer-events: none;
}
.menu-title {
    font-family: var(--serif); font-weight: 400; color: var(--text-strong);
    font-size: clamp(1.5rem, 3.1vmin + 0.6rem, 3.4rem); line-height: 1.05;
    text-wrap: balance;
}
.menu-options { list-style: none; position: absolute; inset: 0; pointer-events: none; }
.menu-options li { position: absolute; left: var(--x); top: var(--y); transform: var(--anchor); pointer-events: auto; width: max-content; max-width: 15.5em; }
.menu-opt {
    display: inline-flex; align-items: center; gap: 0.6em;
    text-align: left;
    padding: 0.55em 0.95em;
    font-size: var(--fs-body); line-height: 1.25; color: var(--text-strong);
    background: rgba(var(--surface-rgb), 0.82);
    border: 1px solid color-mix(in srgb, var(--cat) 45%, transparent);
    border-radius: 10px; cursor: pointer;
    opacity: 0; transform: scale(0.85);
    transition: opacity 0.5s var(--ease), transform 0.5s var(--ease), border-color 0.25s, background 0.25s;
}
.menu-opt::before { content: ''; width: 0.6em; height: 0.6em; border-radius: 50%; background: var(--cat); flex-shrink: 0; }
.menu-opt.is-shown { opacity: 1; transform: none; }
.menu-opt:hover, .menu-opt:focus-visible { border-color: var(--cat); background: rgba(var(--surface-2-rgb), 0.95); }
.legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.4rem 1.6rem; list-style: none; font-size: var(--fs-small); color: var(--text-muted); }
.legend li { display: inline-flex; align-items: center; gap: 0.5em; }
.legend li::before { content: ''; width: 0.6em; height: 0.6em; border-radius: 50%; background: var(--cat); }

/* ─── Scene: genomic medicine ───────────────────────────────── */
.facts { list-style: none; margin-top: 1.6rem; display: grid; gap: 1.05rem; max-width: 34rem; }
.facts li { display: grid; grid-template-columns: 6.6rem 1fr; gap: 1rem; align-items: baseline; }
.facts b {
    font-family: var(--serif); font-weight: 400; color: var(--accent-soft);
    font-size: clamp(1.6rem, 2.2vmin + 0.8rem, 2.6rem); line-height: 1;
    font-variant-numeric: lining-nums;
}
.facts span { font-size: var(--fs-body); line-height: 1.45; color: var(--text); }
.facts .gel-row { grid-column: 2; margin-top: -0.2rem; }
.gm-chr-body { fill: rgba(var(--fill-rgb), 0.16); stroke: rgba(var(--fill-rgb), 0.45); stroke-width: 1; }
.gm-chr-band { fill: rgba(var(--fill-rgb), 0.18); }
.gm-chr-label { font-size: 13px; fill: var(--text-muted) !important; text-anchor: middle; }
.gm-chr { transition: opacity 0.8s var(--ease), transform 1.3s var(--swing); }
.gm-chr.is-dim { opacity: 0.04; }
.gm-chr.is-focus .gm-chr-body { stroke: var(--accent); fill: rgba(var(--accent-rgb), 0.16); }
.gm-marker { fill: var(--c-rose); }
.gm-zoom { fill: rgba(var(--accent-rgb), 0.07); stroke: rgba(var(--accent-rgb), 0.35); stroke-width: 1; }
.gm-intron { stroke: var(--text-muted); stroke-width: 2; }
.gm-exon { fill: var(--accent); opacity: 0.85; }
.gm-exon.is-target { fill: var(--accent-soft); opacity: 1; }
.gm-gene-label { font-size: 15px; fill: var(--text-muted) !important; }
.gm-base rect { fill: rgba(var(--fill-rgb), 0.06); stroke: rgba(var(--fill-rgb), 0.18); }
.gm-base text { font-size: 22px; text-anchor: middle; fill: var(--text) !important; font-weight: 400; }
.gm-base.is-variant rect { fill: rgba(var(--rose-rgb), 0.18); stroke: var(--c-rose); stroke-width: 2; }
.gm-base.is-variant text { fill: var(--c-rose) !important; font-weight: 500; }
.gm-scan { stroke: var(--accent-soft); stroke-width: 2; opacity: 0.8; }
.gm-big { font-family: var(--serif) !important; font-size: 40px; fill: var(--text-strong) !important; font-variant-numeric: lining-nums; }
.gm-big-sub { font-size: 16px; fill: var(--text-muted) !important; }

/* ─── Scene: solve a patient (variant funnel) ───────────────── */
.fn-patients { width: 100%; height: auto; max-height: 13vh; }
.fn-shape { fill: none; stroke: var(--line-strong); stroke-width: 2; transition: fill 0.6s, stroke 0.6s; }
.fn-person.is-solved .fn-shape { fill: rgba(var(--lab-rgb), 0.18); stroke: var(--c-lab); }
.fn-person.is-new .fn-shape { fill: rgba(var(--accent-soft-rgb), 0.25); stroke: var(--accent-soft); }
.fn-badge { opacity: 0; transition: opacity 0.6s 0.3s; }
.fn-person.is-solved .fn-badge, .fn-person.is-new .fn-badge { opacity: 1; }
.fn-badge circle { fill: var(--c-lab); }
.fn-person.is-new .fn-badge circle { fill: var(--accent-soft); }
.fn-badge path { fill: none; stroke: var(--bg); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.fn-tally { font-size: 18px; fill: var(--text-muted) !important; }
.fn-tally tspan.n { fill: var(--text-strong) !important; font-weight: 400; }
.fn-body { display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); gap: clamp(0.8rem, 2vw, 2rem); align-items: center; }
.fn-stages { list-style: none; display: grid; gap: 0.35rem; counter-reset: stage; }
.fn-stages li {
    counter-increment: stage;
    display: grid; grid-template-columns: 1.9em 1fr; gap: 0.6em; align-items: baseline;
    font-size: var(--fs-small); line-height: 1.35; color: var(--text-muted);
    padding: 0.45em 0.6em; border-radius: 8px;
    transition: color 0.4s, background 0.4s;
}
.fn-stages li::before {
    content: counter(stage);
    font-family: var(--serif); font-size: 1.25em; color: var(--text-muted);
    text-align: center;
}
.fn-stages li.is-done { color: var(--text); }
.fn-stages li.is-now { color: var(--text-strong); background: rgba(var(--accent-rgb), 0.1); }
.fn-stages li.is-now::before, .fn-stages li.is-done::before { color: var(--accent-soft); }
.fn-stages li:last-child.is-now { background: rgba(var(--rose-rgb), 0.12); }
.fn-dots { width: 100%; height: auto; max-height: 46vh; overflow: visible; }
.fn-outline { fill: rgba(var(--fill-rgb), 0.025); stroke: var(--line-strong); stroke-width: 1; stroke-dasharray: 4 5; }
.fn-dot { fill: var(--c-comp); transition: transform 1.1s var(--swing), opacity 0.8s ease, fill 0.6s; }
.fn-dot.is-out { opacity: 0 !important; }
.fn-dot.is-one { fill: var(--c-rose); }
.fn-glow { fill: var(--c-rose); opacity: 0; transition: opacity 0.8s; filter: blur(8px); }
.fn-glow.is-on { opacity: 0.7; }

/* ─── Scene: chronomic medicine dial ────────────────────────── */
.angles { list-style: none; margin-top: 1.6rem; display: grid; gap: 0.9rem; max-width: 36rem; }
.angles li { display: grid; grid-template-columns: 7.2rem 1fr; gap: 1rem; align-items: baseline; font-size: var(--fs-body); line-height: 1.45; }
.angles b { font-family: var(--serif); font-weight: 400; font-size: 1.45em; color: var(--accent-soft); line-height: 1; }
.cd-svg { touch-action: pan-y; cursor: grab; }
.cd-hit, .cd-knob { touch-action: none; }
.cd-svg.is-dragging { cursor: grabbing; }
.cd-ring { fill: none; stroke: rgba(var(--accent-rgb), 0.22); stroke-width: 1.2; }
.cd-night { fill: none; stroke: rgba(var(--comp-rgb), 0.28); stroke-width: 8; stroke-linecap: round; }
.cd-day { fill: none; stroke: rgba(var(--accent-rgb), 0.3); stroke-width: 8; stroke-linecap: round; }
.cd-tick { stroke: var(--accent); opacity: 0.3; stroke-width: 1.2; }
.cd-tick.is-major { opacity: 0.6; stroke-width: 2; }
.cd-hour { fill: var(--accent) !important; font-size: 15px; opacity: 0.6; text-anchor: middle; letter-spacing: 0.08em; }
.cd-bar { stroke: var(--accent-soft); stroke-width: 5; stroke-linecap: round; }
.cd-event-dot { fill: var(--bg); stroke: var(--text-muted); stroke-width: 2; transition: fill 0.3s, stroke 0.3s; }
.cd-event text { font-size: 17px; fill: var(--text-muted) !important; transition: fill 0.3s; }
.cd-event.is-near .cd-event-dot { fill: var(--c-rose); stroke: var(--c-rose); }
.cd-event.is-near text { fill: var(--text-strong) !important; }
.cd-event.is-near text tspan.t { fill: var(--c-rose) !important; }
.cd-event text tspan.t { font-size: 14px; letter-spacing: 0.06em; }
.cd-hand { stroke: var(--accent); stroke-width: 3; stroke-linecap: round; filter: drop-shadow(0 0 6px rgba(var(--accent-rgb), 0.6)); }
.cd-knob { fill: var(--accent); stroke: var(--bg); stroke-width: 3; cursor: grab; filter: drop-shadow(0 0 8px rgba(var(--accent-rgb), 0.8)); }
.cd-knob:focus-visible { outline: none; stroke: var(--text-strong); }
.cd-hub { fill: var(--accent); }
.cd-time { font-family: var(--serif) !important; font-size: 64px; fill: var(--text-strong) !important; text-anchor: middle; font-variant-numeric: lining-nums tabular-nums; }
.cd-sun { fill: var(--accent-soft); transition: opacity 0.6s; }
.cd-moon { fill: var(--c-comp); transition: opacity 0.6s; }

/* ─── Scene: missing heritability ───────────────────────────── */
.hr-axis { stroke: var(--line-strong); stroke-width: 1.5; }
.hr-axis-label { font-size: 17px; fill: var(--text-muted) !important; }
.hr-dot { transition: transform 0.9s var(--swing), opacity 0.6s; }
.hr-dot.is-up { transform: translateY(-260px); opacity: 0; }
.hr-sun { fill: var(--accent-soft); }
.hr-moon { fill: var(--c-diss); }
.hr-big { font-family: var(--serif) !important; font-size: 64px; fill: var(--text-strong) !important; font-variant-numeric: lining-nums; }
.hr-big-sub { font-size: 17px; fill: var(--text-muted) !important; }
.hr-person path, .hr-person circle { fill: rgba(var(--fill-rgb), 0.08); stroke: var(--line-strong); stroke-width: 2; }
.hr-chrom { fill: rgba(var(--fill-rgb), 0.1); stroke: rgba(var(--fill-rgb), 0.4); stroke-width: 1; }
.hr-var { fill: var(--c-rose); }
.hr-clockvar { fill: var(--accent-soft); }
.hr-sev-track { fill: rgba(var(--fill-rgb), 0.08); }
.hr-sev-fill { fill: var(--c-rose); transform-box: fill-box; transform-origin: left center; transition: transform 1.2s var(--swing); }
.hr-text { font-size: 17px; fill: var(--text) !important; }
.hr-text-muted { font-size: 15px; fill: var(--text-muted) !important; }
.hr-tile { fill: rgba(var(--fill-rgb), 0.07); stroke: rgba(var(--fill-rgb), 0.2); stroke-width: 1; }
.hr-tile.is-rhythmic { fill: var(--c-lab); stroke: var(--c-lab); }
.hr-scan { fill: rgba(var(--lab-rgb), 0.12); }
.hr-cohort { fill: rgba(var(--comp-rgb), 0.06); stroke: rgba(var(--comp-rgb), 0.45); stroke-width: 1.2; }
.hr-arrow { stroke: var(--text-muted); stroke-width: 1.5; fill: none; }
.hr-q { font-family: var(--serif) !important; font-size: 44px; fill: var(--c-lab) !important; }
.hr-panel { transition: opacity 0.6s var(--ease); }

/* ─── Scene: human cell clock ───────────────────────────────── */
.cl-dish { fill: rgba(var(--lab-rgb), 0.03); stroke: rgba(var(--lab-rgb), 0.35); stroke-width: 2; }
.cl-dish-rim { fill: none; stroke: rgba(var(--lab-rgb), 0.12); stroke-width: 10; }
.cl-cell { stroke: rgba(var(--lab-rgb), 0.5); stroke-width: 1; }
.cl-nucleus { fill: rgba(var(--bg-rgb), 0.55); }
.cl-ripple { fill: none; stroke: var(--accent-soft); stroke-width: 3; opacity: 0; }
.cl-frame { fill: rgba(var(--surface-rgb), 0.6); stroke: var(--line); }
.cl-gridline { stroke: var(--line); stroke-width: 1; }
.cl-trace { fill: none; stroke: var(--c-lab); stroke-width: 3; stroke-linejoin: round; stroke-linecap: round; }
.cl-pulse-mark { stroke: var(--accent-soft); stroke-width: 1.5; stroke-dasharray: 4 5; }
.cl-axis-label { font-size: 15px; fill: var(--text-muted) !important; }
.cl-title { font-size: 17px; fill: var(--text) !important; }
.cl-clock { font-family: var(--serif) !important; font-size: 30px; fill: var(--text-strong) !important; font-variant-numeric: lining-nums; }
.cl-controls { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }

/* ─── Scene: Native Workbench ───────────────────────────────── */
.wb-window { fill: rgba(var(--surface-rgb), 0.92); stroke: var(--line-strong); stroke-width: 1.2; }
.wb-bar { fill: rgba(var(--surface-2-rgb), 0.95); }
.wb-light { fill: var(--line-strong); }
.wb-title { font-size: 15px; fill: var(--text-muted) !important; }
.wb-node rect { fill: var(--node-bg); stroke: rgba(var(--comp-rgb), 0.55); stroke-width: 1.4; transition: fill 0.3s, stroke 0.3s; }
.wb-node text { font-size: 15px; fill: var(--text-strong) !important; text-anchor: middle; }
.wb-node.is-busy rect { fill: var(--node-bg-busy); stroke: var(--c-comp); }
.wb-link { stroke: rgba(var(--comp-rgb), 0.4); stroke-width: 2; fill: none; stroke-dasharray: 5 6; animation: wb-dash 1.2s linear infinite; }
@keyframes wb-dash { to { stroke-dashoffset: -22; } }
.wb-packet { fill: var(--c-comp); }
.wb-log-bg { fill: rgba(var(--bg-rgb), 0.7); stroke: var(--line); }
.wb-log text { font-family: var(--mono) !important; font-size: 13.5px; fill: var(--text) !important; }
.wb-log text tspan.ok { fill: var(--c-lab) !important; }
.wb-log-line { opacity: 0; transition: opacity 0.5s; }
.wb-log-line.is-shown { opacity: 1; }
.wb-bench-label { font-size: 15px; fill: var(--text-muted) !important; }
.wb-bench-track { fill: rgba(var(--fill-rgb), 0.07); }
.wb-bench-fill { transform-box: fill-box; transform-origin: left center; }
.wb-bench-fill.win { fill: var(--c-comp); }
.wb-bench-fill.lin { fill: var(--c-diss); }
.wb-match { font-size: 15px; fill: var(--c-lab) !important; opacity: 0; transition: opacity 0.6s; }
.wb-match.is-shown { opacity: 1; }
.wb-pillars { list-style: none; display: flex; flex-wrap: wrap; gap: 0.45rem; }
.wb-pillars li {
    font-size: var(--fs-small); padding: 0.3em 0.85em; border-radius: 999px;
    border: 1px solid var(--line-strong); color: var(--text-muted);
    transition: color 0.4s, border-color 0.4s, background 0.4s;
}
.wb-pillars li.is-lit { color: var(--text-strong); border-color: var(--c-comp); background: rgba(var(--comp-rgb), 0.1); }

/* ─── Scene: dissertations ──────────────────────────────────── */
.ds-inner { display: flex; flex-direction: column; justify-content: center; gap: clamp(1.2rem, 3vh, 2.4rem); }
.ds-head .scene-title { margin-bottom: 0.4rem; }
.ds-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(0.9rem, 2vw, 2rem); }
.ds-card {
    display: flex; flex-direction: column; gap: 0.9rem;
    padding: clamp(0.9rem, 1.6vw, 1.5rem);
    border: 1px solid rgba(var(--diss-rgb), 0.28); border-radius: 14px;
    background: linear-gradient(180deg, rgba(var(--diss-rgb), 0.05), rgba(var(--surface-rgb), 0.4));
    transition: border-color 0.3s, transform 0.4s var(--ease);
}
.ds-card.is-highlight { border-color: var(--c-diss); transform: translateY(-4px); }
.ds-card svg { width: 100%; height: auto; max-height: 30vh; border-radius: 10px; }
.ds-card h3 {
    font-family: var(--serif); font-weight: 400; color: var(--text-strong);
    font-size: clamp(1.3rem, 1.5vmin + 0.75rem, 2.05rem); line-height: 1.12;
    text-wrap: balance; flex: 1;
}
.ds-card .btn { align-self: flex-start; font-size: var(--fs-small); }
.ds-text { font-size: 13px; fill: var(--text) !important; }
.ds-text-muted { font-size: 12px; fill: var(--text-muted) !important; }
/* Venn */
.ds-circle { fill-opacity: 0.16; stroke-width: 1.5; }
.ds-bio { animation: venn-a 7s var(--swing) infinite; }
.ds-cs { animation: venn-b 7s var(--swing) infinite; }
.ds-stats { animation: venn-c 7s var(--swing) infinite; }
.ds-dsci { animation: venn-d 7s var(--swing) infinite; }
.ds-bio circle { fill: var(--c-lab); stroke: var(--c-lab); }
.ds-cs circle { fill: var(--c-comp); stroke: var(--c-comp); }
.ds-stats circle { fill: var(--accent); stroke: var(--accent); }
.ds-dsci circle { fill: var(--c-diss); fill-opacity: 0.1; stroke: var(--c-diss); stroke-dasharray: 6 5; }
.ds-q { font-family: var(--serif) !important; font-size: 40px; fill: var(--text-strong) !important; animation: venn-q 7s ease infinite; }
@keyframes venn-a { 0%, 8% { transform: translate(-34px, -14px); } 30%, 100% { transform: none; } }
@keyframes venn-b { 0%, 8% { transform: translate(34px, -14px); } 30%, 100% { transform: none; } }
@keyframes venn-c { 0%, 8% { transform: translate(0, 30px); } 30%, 100% { transform: none; } }
@keyframes venn-d { 0%, 38% { transform: translate(120px, 0); opacity: 0; } 58%, 92% { transform: none; opacity: 1; } 100% { transform: none; opacity: 0; } }
@keyframes venn-q { 0%, 55% { opacity: 0; } 65%, 90% { opacity: 1; } 100% { opacity: 0; } }
.ds-venn-label { font-size: 12.5px; fill: var(--text-strong) !important; stroke: none; text-anchor: middle; }
/* Heart */
.ds-heart { fill: rgba(var(--rose-rgb), 0.2); stroke: var(--c-rose); stroke-width: 2; transform-box: fill-box; transform-origin: center; animation: beat 1s ease-in-out infinite; }
@keyframes beat { 0%, 100% { transform: scale(1); } 12% { transform: scale(1.1); } 24% { transform: scale(0.97); } 36% { transform: scale(1.05); } }
.ds-ecg { fill: none; stroke: var(--c-rose); stroke-width: 2; stroke-linejoin: round; stroke-dasharray: 100; animation: ecg 2.6s linear infinite; }
@keyframes ecg { from { stroke-dashoffset: 100; } to { stroke-dashoffset: -100; } }
.ds-daybar { fill: rgba(var(--fill-rgb), 0.08); }
.ds-morning { fill: var(--c-rose); animation: morning 2s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
@keyframes morning { 0%, 100% { opacity: 0.45; } 50% { opacity: 1; } }
/* Daphnia */
.ds-water-day { fill: url(#dsWater); }
.ds-nightshade { fill: var(--nightshade); animation: nightfall 12s ease-in-out infinite; }
@keyframes nightfall { 0%, 35% { opacity: 0; } 50%, 85% { opacity: var(--nightshade-max); } 100% { opacity: 0; } }
.ds-water-top { stop-color: var(--water-top); }
.ds-water-bottom { stop-color: var(--water-bottom); }
.ds-daphnia-depth { animation: migrate 12s ease-in-out infinite; }
@keyframes migrate { 0%, 30% { transform: translateY(26px); } 50%, 80% { transform: translateY(-26px); } 100% { transform: translateY(26px); } }
.ds-daphnia-hop { animation: hop 1.4s ease-in-out infinite; }
@keyframes hop { 0%, 100% { transform: translateY(0); } 18% { transform: translateY(-9px); } }
.ds-antenna { transform-box: fill-box; transform-origin: 100% 100%; animation: row 1.4s ease-in-out infinite; }
@keyframes row { 0%, 100% { transform: rotate(0deg); } 18% { transform: rotate(22deg); } }
.ds-carapace { fill: var(--daphnia-body); stroke: rgba(var(--daphnia-rgb), 0.75); stroke-width: 1.6; }
.ds-limb { stroke: rgba(var(--daphnia-rgb), 0.7); stroke-width: 1.4; fill: none; stroke-linecap: round; }
.ds-eye { fill: #0b0f18; stroke: rgba(var(--daphnia-rgb), 0.6); }
.ds-gut { fill: none; stroke: rgba(var(--accent-rgb), 0.55); stroke-width: 3; stroke-linecap: round; }
.ds-dheart { fill: var(--c-rose); transform-box: fill-box; transform-origin: center; animation: dbeat 0.32s ease-in-out infinite; }
@keyframes dbeat { 0%, 100% { transform: scale(1); } 50% { transform: scale(0.7); } }
.ds-egg { fill: rgba(var(--accent-rgb), 0.35); }
.ds-sunmoon-sun { fill: var(--accent-soft); animation: sunset 12s ease-in-out infinite; }
.ds-sunmoon-moon { fill: var(--c-comp); animation: moonrise 12s ease-in-out infinite; }
@keyframes sunset { 0%, 35% { opacity: 1; } 50%, 85% { opacity: 0; } 100% { opacity: 1; } }
@keyframes moonrise { 0%, 35% { opacity: 0; } 50%, 85% { opacity: 1; } 100% { opacity: 0; } }

/* ─── Scene: closing ────────────────────────────────────────── */
.join-contact { display: flex; align-items: center; gap: 1.1rem; margin-top: 1.5rem; }
.join-contact img { width: clamp(64px, 9vmin, 104px); height: auto; aspect-ratio: 1; object-fit: cover; border-radius: 50%; border: 2px solid rgba(var(--accent-rgb), 0.35); }
.join-contact p { font-size: var(--fs-body); color: var(--text-muted); line-height: 1.45; }
.join-contact strong { color: var(--text-strong); font-weight: 400; font-family: var(--serif); font-size: 1.35em; }
.join-email {
    color: var(--accent-soft); text-decoration: none; font-size: var(--fs-lead);
    border-bottom: 1px solid rgba(var(--accent-rgb), 0.35);
}
.join-email:hover { border-color: var(--accent); }
.join-where { margin-top: 1rem; font-size: var(--fs-body); color: var(--text-muted); }
.join-papers { margin-top: 1.4rem; max-width: 40rem; }
.join-papers h3 { font-family: var(--sans); font-weight: 400; font-size: var(--fs-small); color: var(--text); margin-bottom: 0.4rem; }
.join-papers ul { list-style: none; display: grid; gap: 0.3rem; }
.join-papers a { font-size: var(--fs-small); color: var(--text-muted); text-decoration: none; line-height: 1.4; display: inline; border-bottom: 1px solid var(--line); }
.join-papers a:hover { color: var(--accent-soft); border-color: var(--accent); }
.join-papers a span { color: var(--text-strong); }
.join-side { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1rem; height: 100%; min-height: 0; }
.join-clock { position: relative; width: min(100%, 50vh); aspect-ratio: 1; flex-shrink: 1; }
.join-clock .vis { width: 100%; height: 100%; max-height: none; }
.join-qr {
    position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
    width: 31%; padding: 2.4%; background: #fff; border-radius: 8px;
    box-shadow: 0 0 0 7px rgba(var(--bg-rgb), 0.85);
}
.join-qr img { width: 100%; height: auto; }
.join-url { font-size: var(--fs-small); color: var(--text-muted); text-align: center; line-height: 1.5; }
.join-url a { color: var(--accent-soft); text-decoration: none; border-bottom: 1px solid rgba(var(--accent-rgb), 0.35); }
.join-jump { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.4rem; list-style: none; max-width: 40rem; }
.join-jump button {
    display: inline-flex; align-items: center; gap: 0.45em;
    font-size: 0.86rem; padding: 0.3em 0.75em; border-radius: 999px;
    background: rgba(var(--surface-rgb), 0.7); color: var(--text);
    border: 1px solid color-mix(in srgb, var(--cat) 45%, transparent); cursor: pointer;
}
.join-jump button::before { content: ''; width: 0.5em; height: 0.5em; border-radius: 50%; background: var(--cat); }
.join-jump button:hover { border-color: var(--cat); color: var(--text-strong); }

/* ─── Pager (prev / next) ───────────────────────────────────── */
.pager {
    position: fixed; right: var(--pad-x); bottom: clamp(0.9rem, 3vh, 1.8rem); z-index: 20;
    display: flex; gap: 0.5rem;
}
.pager-btn {
    width: 48px; height: 48px; border-radius: 50%;
    display: grid; place-items: center;
    border: 1px solid var(--line-strong);
    background: rgba(var(--surface-rgb), 0.65); color: var(--text);
    -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
    cursor: pointer; transition: border-color 0.25s, color 0.25s, opacity 0.25s;
}
.pager-btn svg { width: 20px; height: 20px; }
.pager-btn:hover { border-color: var(--accent); color: var(--accent); }
.pager-btn[disabled] { opacity: 0.25; cursor: default; }
.pager-btn[disabled]:hover { border-color: var(--line-strong); color: var(--text); }

/* ─── Details drawer ────────────────────────────────────────── */
.drawer { position: fixed; inset: 0; z-index: 40; visibility: hidden; transition: visibility 0s 0.45s; }
.drawer.is-open { visibility: visible; transition: visibility 0s 0s; }
.drawer-scrim { position: absolute; inset: 0; background: var(--scrim); opacity: 0; transition: opacity 0.35s ease; }
.drawer.is-open .drawer-scrim { opacity: 1; }
.drawer-panel {
    position: absolute; top: 0; right: 0; bottom: 0;
    width: min(38rem, 100%);
    background: var(--surface); border-left: 1px solid var(--line);
    box-shadow: var(--panel-shadow);
    transform: translateX(102%); transition: transform 0.45s var(--ease);
    overflow-y: auto; overscroll-behavior: contain;
    padding: 4.2rem clamp(1.25rem, 3vw, 2.8rem) 3rem;
}
.drawer.is-open .drawer-panel { transform: none; }
.drawer-close { position: absolute; top: 0.9rem; right: 0.9rem; }
.drawer-body, .no-js .details { color: var(--text); }
.drawer-body h3, .no-js .details h3 {
    font-family: var(--serif); font-weight: 400; color: var(--text-strong);
    font-size: clamp(1.6rem, 2.5vw, 2.1rem); line-height: 1.12; margin-bottom: 0.9rem;
    text-wrap: balance;
}
.drawer-body h4, .no-js .details h4 { font-weight: 500; font-size: 0.98rem; color: var(--accent-soft); margin: 1.8rem 0 0.55rem; }
.drawer-body p, .no-js .details p { font-size: 1rem; line-height: 1.72; margin-bottom: 0.85rem; max-width: 64ch; }
.drawer-body ul.plain { list-style: none; display: grid; gap: 0.45rem; margin-bottom: 0.6rem; }
.drawer-body ul.plain li { position: relative; padding-left: 1.1rem; font-size: 0.98rem; line-height: 1.55; }
.drawer-body ul.plain li::before { content: ''; position: absolute; left: 0; top: 0.62em; width: 0.4rem; height: 0.4rem; border-radius: 50%; background: var(--accent); opacity: 0.7; }
.drawer-body .chips { margin-bottom: 1.1rem; }
.drawer-body a { color: var(--accent-soft); }
.drawer-body figure { margin: 1rem 0 1.2rem; }
.drawer-body figure svg { width: 100%; height: auto; }
.drawer-body figcaption { font-size: 0.86rem; color: var(--text-muted); margin-top: 0.4rem; }
.refs { list-style: none; }
.refs li { padding: 0.8rem 0; border-top: 1px solid var(--line); }
.refs li:last-child { border-bottom: 1px solid var(--line); }
.refs a {
    font-family: var(--serif); font-size: 1.16rem; line-height: 1.3;
    color: var(--text-strong) !important; text-decoration: none;
    border-bottom: 1px solid rgba(var(--accent-rgb), 0.3);
}
.refs a:hover { color: var(--accent-soft) !important; border-color: var(--accent); }
.refs .ref-meta { display: block; margin-top: 0.3rem; font-size: 0.86rem; color: var(--text-muted); line-height: 1.5; }
.ttfl-node { fill: rgba(var(--lab-rgb), 0.1); stroke: var(--c-lab); stroke-width: 1.4; }
.ttfl-node.b { fill: rgba(var(--accent-rgb), 0.1); stroke: var(--accent); }
.ttfl-text { font-family: var(--sans); font-size: 14px; fill: var(--text-strong); text-anchor: middle; }
.ttfl-arrow { fill: none; stroke: var(--text-muted); stroke-width: 1.6; }
.ttfl-label { font-family: var(--sans); font-size: 12.5px; fill: var(--text-muted); text-anchor: middle; }

/* ─── Overview, help, blackout ──────────────────────────────── */
.overlay {
    position: fixed; inset: 0; z-index: 35;
    background: rgba(var(--bg-rgb), 0.95);
    -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
    display: grid; place-items: center; overflow-y: auto;
    padding: 4.5rem var(--pad-x) 3rem;
    opacity: 0; visibility: hidden; transition: opacity 0.3s, visibility 0s 0.3s;
}
.overlay.is-open { opacity: 1; visibility: visible; transition: opacity 0.3s, visibility 0s 0s; }
.overlay h2 { font-family: var(--serif); font-weight: 400; color: var(--text-strong); font-size: clamp(1.8rem, 3vw, 2.6rem); margin-bottom: 1.4rem; }
.overlay-close { position: fixed; top: 0.9rem; right: 0.9rem; }
.overview-list { list-style: none; counter-reset: sc; columns: 2 18rem; column-gap: 3rem; width: min(64rem, 100%); }
.overview-list li { break-inside: avoid; counter-increment: sc; }
.overview-list button {
    width: 100%; display: grid; grid-template-columns: 2.4rem 1fr; gap: 0.6rem; align-items: baseline;
    text-align: left; background: none; border: none; cursor: pointer;
    padding: 0.7rem 0.8rem; border-radius: 8px; color: var(--text);
    font-size: 1.02rem; line-height: 1.35;
}
.overview-list button::before { content: counter(sc); font-family: var(--serif); font-size: 1.35rem; color: var(--text-muted); }
.overview-list button:hover, .overview-list button:focus-visible { background: rgba(var(--accent-rgb), 0.08); color: var(--text-strong); }
.overview-list button[aria-current="true"] { color: var(--text-strong); background: rgba(var(--accent-rgb), 0.12); }
.overview-list button[aria-current="true"]::before { color: var(--accent-soft); }
.overview-list .cat-dot { display: inline-block; width: 0.55em; height: 0.55em; border-radius: 50%; background: var(--cat); margin-right: 0.5em; vertical-align: 0.08em; }
.help-list { display: grid; grid-template-columns: auto 1fr; gap: 0.7rem 1.6rem; align-items: baseline; font-size: 1.02rem; }
.help-list dt { text-align: right; white-space: nowrap; }
.help-list dd { color: var(--text-muted); }
.blackout { position: fixed; inset: 0; z-index: 100; background: #000; display: none; cursor: none; }
.blackout.is-on { display: block; }

/* Small colour classes used inside the SVG diagrams */
.t-rose { fill: var(--c-rose) !important; }
.t-accent { fill: var(--accent-soft) !important; }
.t-diss { fill: var(--c-diss) !important; }
.mk { fill: var(--text-muted); }
.mk-bar { stroke: var(--text-muted); stroke-width: 3; }
.ttfl-sub { font-size: 12px; fill: var(--text-muted); }
.ttfl-period { fill: var(--accent-soft); }
.ds-bg { fill: rgba(var(--bg-rgb), 0.45); }
.hc-rung.b0 { stroke: var(--accent-soft); }
.hc-rung.b1 { stroke: var(--c-lab); }
.hc-rung.b2 { stroke: var(--c-comp); }
.hc-rung.b3 { stroke: var(--c-rose); }
.cl-cell { fill: var(--c-lab); }

/* ─── Light theme touches ───────────────────────────────────── */
[data-theme="light"] .wb-window { fill: #f6f9fd; }
[data-theme="light"] .wb-bar { fill: #e6eef8; }
[data-theme="light"] .wb-log-bg { fill: #ffffff; }
[data-theme="light"] .cl-frame { fill: #ffffff; }
[data-theme="light"] .cl-dish { fill: rgba(var(--lab-rgb), 0.05); }
[data-theme="light"] .cl-nucleus { fill: rgba(10, 37, 64, 0.35); }
[data-theme="light"] .ds-card { background: linear-gradient(180deg, rgba(var(--diss-rgb), 0.06), #ffffff); box-shadow: 0 1px 2px rgba(10, 37, 64, 0.04), 0 10px 28px rgba(10, 37, 64, 0.07); }
[data-theme="light"] .menu-opt { box-shadow: 0 1px 2px rgba(10, 37, 64, 0.05), 0 6px 18px rgba(10, 37, 64, 0.06); }
[data-theme="light"] .hc-strand.hc-back { opacity: 0.28; }
[data-theme="light"] .hc-hand, [data-theme="light"] .mn-hand, [data-theme="light"] .cd-hand { filter: none; }
[data-theme="light"] .hc-hub, [data-theme="light"] .cd-knob { filter: drop-shadow(0 1px 3px rgba(10, 37, 64, 0.3)); }
[data-theme="light"] .sweep-hand { filter: none; }
[data-theme="light"] .fn-glow.is-on { opacity: 0.45; }
[data-theme="light"] .gel-logo, [data-theme="light"] .gel-mini { opacity: 1; }
[data-theme="light"] .drawer-panel { background: #ffffff; }
[data-theme="light"] .overlay { background: rgba(255, 255, 255, 0.96); }

/* ─── Reduced motion ────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; }
    .js [data-show-at], .fn-dot, .gm-chr, .hr-dot, .hr-sev-fill, .menu-opt { transition-duration: 0.01ms !important; }
}

/* ─── Without JavaScript: show everything as one long page ──── */
.no-js body { overflow: auto; }
.no-js .deck { position: static; }
.no-js .scene { position: relative; visibility: visible; opacity: 1; min-height: 100vh; overflow: visible; }
.no-js .details[hidden] { display: block; margin-top: 2rem; }
.no-js .chrome-tools, .no-js .pager, .no-js .hint, .no-js .menu-options { display: none; }
.no-js .menu-opt, .no-js [data-show-at] { opacity: 1; transform: none; }

/* ─── Responsive ────────────────────────────────────────────── */
@media (max-width: 1100px) {
    .layout-split .scene-inner { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
    .facts li, .angles li { grid-template-columns: 5.6rem 1fr; }
    .menu-stage { width: min(58vh, 48vw); }
    .menu-opt { font-size: var(--fs-small); }
    .menu-options li { max-width: 13em; }
}

@media (max-width: 820px) {
    .brand span { display: none; }
    .chrome {
        padding-bottom: 0.9rem;
        background: linear-gradient(to bottom, rgba(var(--bg-rgb), 0.97) 60%, rgba(var(--bg-rgb), 0));
    }
    .scene {
        overflow-y: auto; -webkit-overflow-scrolling: touch; overscroll-behavior: contain;
        padding: 4.6rem 1.15rem 6.5rem;
    }
    .scene-inner, .layout-split .scene-inner, .scene--start .scene-inner {
        grid-template-columns: minmax(0, 1fr);
        height: auto; min-height: 100%; align-content: start;
        gap: 1.6rem;
    }
    .scene-visual { order: -1; height: auto; }
    .scene--start .scene-visual { order: -1; }
    .scene--start .start-visual .vis { max-width: 64vw; margin: 0 auto; }
    .vis { max-height: 56vh; }
    .hint { position: static; margin-top: 1.5rem; }
    .fn-body { grid-template-columns: minmax(0, 1fr); }
    .menu-inner { justify-content: start; }
    .menu-stage { width: 100%; aspect-ratio: auto; display: grid; gap: 1.2rem; }
    .menu-dial { position: relative; inset: auto; width: min(78vw, 44vh); aspect-ratio: 1; margin: 0 auto; }
    .menu-center { width: 60%; }
    .menu-title { font-size: 1.4rem; }
    .menu-options { position: static; display: grid; gap: 0.5rem; width: 100%; pointer-events: auto; }
    .menu-options li { position: static; transform: none; width: auto; max-width: none; }
    .menu-opt { max-width: none; width: 100%; }
    .ds-grid { grid-template-columns: minmax(0, 1fr); }
    .ds-card svg { max-height: 34vh; }
    .join-side { order: 2; }
    .pager {
        left: 0; right: 0; bottom: 0; justify-content: flex-end;
        padding: 1.6rem 1rem max(0.9rem, env(safe-area-inset-bottom));
        background: linear-gradient(to top, rgba(var(--bg-rgb), 0.96) 45%, rgba(var(--bg-rgb), 0));
        pointer-events: none;
    }
    .pager-btn { pointer-events: auto; }
    .fn-dots { max-height: 34vh; }
    .join-clock { width: min(80vw, 46vh); }
    .facts li, .angles li { grid-template-columns: 4.8rem 1fr; gap: 0.7rem; }
    .drawer-panel { padding-top: 4rem; }
}

@media (max-height: 820px) and (min-width: 821px) {
    .join-clock { width: min(100%, 42vh); }
    .join-jump button { font-size: 0.8rem; padding: 0.22em 0.65em; }
}

@media (max-height: 560px) and (min-width: 821px) {
    :root { --pad-top: 3.8rem; --pad-bottom: 3.6rem; }
    .lead { font-size: 1rem; }
    .facts, .angles { gap: 0.5rem; margin-top: 0.9rem; }
}