/* A motion notebook: ruled diagrams, open layouts and a shared route motif. */
:root {
    color-scheme: dark;
    --paper: #0b101a; --ink: #f2f0f7; --muted: #b6bbcc;
    --surface: #131e20; --border: #354043; --accent: #b7d8ce;
    --accent-solid: #245e51; --button-hover: #263635;
    --mint: #131e20; --peach: #131e20; --lilac: #131e20;
    --camera-surface: #131e20; --camera-ink: #d8eaf5;
    --grid-lines: #eaf2ff30; --diagram-first: #85e5e3; --diagram-second: #e6c29e;
    --detected-ink: #91f8bf; --cancelled-ink: #ffaaa6;
    font-family: "Segoe UI", Arial, sans-serif;
    color: var(--ink); background: var(--paper);
}
@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) {
        color-scheme: light;
        --paper: #f7f4ed; --ink: #192332; --muted: #505e70;
        --surface: #fff; --border: #cdcfc5; --accent: #246557;
        --button-hover: #e9e8df; --mint: #f0eee7; --peach: #f0eee7; --lilac: #f0eee7;
        --camera-surface: #fff; --camera-ink: #293b50; --grid-lines: #24364a30;
        --diagram-first: #08777b; --diagram-second: #985a19;
        --detected-ink: #146234; --cancelled-ink: #a32726;
    }
}
:root[data-theme="light"] {
    color-scheme: light;
    --paper: #f7f4ed; --ink: #192332; --muted: #505e70;
    --surface: #fff; --border: #cdcfc5; --accent: #246557;
    --button-hover: #e9e8df; --mint: #f0eee7; --peach: #f0eee7; --lilac: #f0eee7;
    --camera-surface: #fff; --camera-ink: #293b50; --grid-lines: #24364a30;
    --diagram-first: #08777b; --diagram-second: #985a19;
    --detected-ink: #146234; --cancelled-ink: #a32726;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; }
a { color: inherit; text-underline-offset: 4px; }
button, input { font: inherit; }
button { cursor: pointer; }
button:disabled { opacity: .55; cursor: default; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
::selection { background: var(--accent-solid); color: white; }
.header, .section, .footer { width: min(1200px, calc(100% - 64px)); margin-inline: auto; }
.header { display: flex; align-items: center; justify-content: space-between; min-height: 104px; gap: 24px; border-bottom: 1px solid var(--border); }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; font-size: 16px; font-weight: 650; letter-spacing: -.02em; }
.brand-mark { width: 36px; height: 36px; flex-shrink: 0; }
.brand-caption { display: block; color: var(--muted); font-size: 11px; font-weight: 400; margin-top: 4px; letter-spacing: 0; }
nav { display: flex; align-items: center; gap: 24px; font-size: 14px; }
nav a { text-decoration: none; padding-block: 12px; }
nav a:hover { color: var(--accent); }
.languages { display: flex; gap: 2px; }
.languages button { min-height: 44px; min-width: 38px; border: 0; border-bottom: 2px solid transparent; background: transparent; color: var(--muted); }
.languages [aria-pressed="true"] { border-bottom-color: var(--accent); color: var(--ink); }
.theme-toggle { width: 44px; height: 44px; border: 0; border-radius: 50%; background: transparent; color: var(--ink); font-size: 22px; }
.section { padding-block: 72px; scroll-margin-top: 20px; }
.hero { display: grid; grid-template-columns: 1.15fr 1fr; align-content: center; align-items: center; gap: 64px; min-height: calc(100svh - 104px); text-align: left; }
.hero-copy { width: 100%; min-width: 0; }
.eyebrow { color: var(--accent); font: 12px/1.6 Consolas, monospace; margin: 0 0 18px; }
h1 { font-family: Georgia, "Times New Roman", serif; font-size: clamp(46px, 5.4vw, 78px); line-height: 1.06; letter-spacing: -.045em; margin: 0 0 24px; font-weight: 400; text-wrap: balance; }
h2 { font-family: Georgia, "Times New Roman", serif; font-size: clamp(30px, 3.7vw, 48px); line-height: 1.16; letter-spacing: -.035em; max-width: 790px; margin: 0 0 24px; font-weight: 400; text-wrap: balance; }
.lead { color: var(--muted); font-size: clamp(17px, 1.5vw, 21px); line-height: 1.7; max-width: 660px; }
.hero-facts { display: flex; flex-wrap: wrap; gap: 12px 20px; list-style: none; padding: 16px 0; border-block: 1px solid var(--border); margin: 24px 0 28px; font: 11px/1.6 Consolas, monospace; color: var(--muted); }
.camera-actions { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-start; margin-top: 24px; }
.guided-start { order: -1; display: flex; flex-direction: column; align-items: flex-start; gap: 8px; }
.guided-start > span { color: var(--muted); font-size: 12px; line-height: 1.4; max-width: 240px; text-align: center; }
.guided-start:has(#start-assisted[hidden]) { display: none; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 8px; min-height: 48px; border-radius: 3px; padding: 12px 20px; text-decoration: none; font-size: 14px; line-height: 1.5; font-weight: 600; border: 1px solid var(--border); }
.primary { color: white; background: var(--accent-solid); border-color: var(--accent-solid); }
.primary:hover { background: #174a3e; border-color: #174a3e; }
.secondary { background: var(--surface); color: var(--ink); }
.secondary:hover, .theme-toggle:hover { background: var(--button-hover); }
.danger { background: var(--surface); color: var(--cancelled-ink); }
.manual-link { display: inline-block; font-size: 14px; color: var(--accent); margin-top: 16px; padding-block: 8px; }
.privacy { font-size: 12px; line-height: 1.7; max-width: 570px; color: var(--muted); margin-top: 24px; }
.manual-hint { color: var(--muted); font-size: 14px; line-height: 1.65; }
.hero.camera-open { grid-template-columns: 1fr 1fr; text-align: left; gap: 40px; padding-block: 32px; }
.hero.camera-open .camera-actions { justify-content: flex-start; }
.hero.camera-open :is(.hero-facts, .manual-link) { display: none; }
.hero.camera-open .motion-study { display: none; }
.motion-study { margin: 0; min-width: 0; width: 100%; max-width: 480px; justify-self: end; }
.study-heading, .motion-study figcaption { display: flex; justify-content: space-between; gap: 16px; color: var(--muted); font: 11px/1.6 Consolas, monospace; }
.study-heading { border-bottom: 1px solid var(--border); padding-bottom: 12px; }
.motion-study > svg { display: block; width: 100%; height: auto; margin-block: 18px; overflow: visible; }
.study-grid { color: var(--border); stroke: var(--border); }
.study-axis { fill: var(--muted); font: 10px Consolas, monospace; }
.study-axis path { fill: none; stroke: var(--muted); stroke-width: 1; }
.study-trace { stroke: var(--muted); stroke-width: 1.5; stroke-dasharray: 3 5; fill: none; opacity: .6; }
.study-cells { fill: var(--accent); fill-opacity: .12; stroke: var(--accent); stroke-width: 1; }
.study-cells .study-end { fill: var(--diagram-second); stroke: var(--diagram-second); }
.study-route { fill: none; stroke: var(--accent); stroke-width: 2; }
.study-nodes { fill: var(--accent); stroke: var(--paper); stroke-width: 2; }
.study-labels { fill: var(--ink); font: 11px Consolas, monospace; }
.motion-study figcaption { border-top: 1px solid var(--border); padding-top: 12px; }
.study-key { display: inline-flex; align-items: center; gap: 8px; white-space: nowrap; }
.study-key i { width: 18px; border-top: 2px solid var(--accent); }
.hero.camera-open .hero-copy { max-width: 520px; }
.camera-placement { font-size: 15px; line-height: 1.7; color: var(--camera-ink); max-width: 520px; }
.camera-card { background: var(--camera-surface); padding: 12px; border: 1px solid var(--border); border-radius: 14px; width: min(100%, calc(52svh * var(--camera-ratio, 1.333))); justify-self: center; }
.camera-preview { position: relative; aspect-ratio: 4/3; background: #121b29; border-radius: 8px; overflow: hidden; }
.camera-preview :is(video, canvas) { width: 100%; height: 100%; object-fit: contain; transform: scaleX(-1); position: absolute; inset: 0; }
.preview-decoration { position: absolute; inset: 0; display: grid; place-items: center; padding: 24px; text-align: center; color: #d8eaf5; font-size: 14px; line-height: 1.6; }
.camera-card.is-running .preview-decoration { display: none; }
#camera-status { position: absolute; top: 8px; left: 8px; right: 8px; z-index: 3; font-size: 13px; line-height: 1.5; margin: 0; padding: 8px; text-align: center; color: white; background: #142333e6; border-radius: 5px; }
.camera-feedback { padding: 16px; margin-top: 20px; border: 1px solid var(--border); border-left: 3px solid var(--accent); border-radius: 8px; background: var(--surface); font-size: 14px; line-height: 1.65; }
.camera-feedback p { margin: 0 0 8px; }
.camera-feedback a { color: var(--accent); }
.camera-card.is-running .camera-preview { outline: 3px solid #db977a; outline-offset: -3px; }
.camera-card.is-running.has-hands .camera-preview { outline-color: #67bc94; }
.camera-preview.preview-offscreen video { visibility: hidden; }
.camera-edge { position: absolute; pointer-events: none; z-index: 2; }
[data-camera-edge="top"] { inset: 0 0 auto; height: 15%; background: linear-gradient(#db977a88, transparent); }
[data-camera-edge="bottom"] { inset: auto 0 0; height: 15%; background: linear-gradient(to top, #db977a88, transparent); }
[data-camera-edge="left"] { inset: 0 auto 0 0; width: 15%; background: linear-gradient(to right, #db977a88, transparent); }
[data-camera-edge="right"] { inset: 0 0 0 auto; width: 15%; background: linear-gradient(to left, #db977a88, transparent); }
.slideshow-section { border-top: 1px solid var(--border); min-height: 100svh; }
.slideshow-section > .manual-hint { margin-bottom: 20px; }
.carousel-window { width: 100%; padding-block: 8px; }
.carousel-track { position: relative; height: clamp(420px, 56svh, 640px); }
.slide { display: grid; grid-template-columns: 1.1fr 1fr; padding: 32px; gap: 32px; border-block: 1px solid var(--border); background: var(--mint); height: 100%; touch-action: pan-y; }
.slide[data-color="peach"] { background: var(--peach); }
.slide[data-color="lilac"] { background: var(--lilac); }
.slide-tag { font: 12px/1.6 Consolas, monospace; color: var(--muted); }
.slide h3 { font-family: Georgia, "Times New Roman", serif; font-size: clamp(28px, 3vw, 44px); line-height: 1.15; letter-spacing: -.035em; margin: 20px 0; font-weight: 400; }
.slide-copy > p:last-child { max-width: 540px; font-size: 17px; line-height: 1.7; color: var(--muted); }
.slide-art { display: flex; align-items: center; justify-content: center; position: relative; min-width: 0; min-height: 0; padding-left: 24px; border-left: 1px solid var(--border); }
.slide-number { position: absolute; top: 0; right: 0; font-size: 13px; font-variant-numeric: tabular-nums; color: var(--muted); }
.slide-controls { display: flex; justify-content: flex-end; align-items: center; gap: 24px; margin-top: 20px; }
.arrow-button { border: 1px solid var(--border); color: var(--ink); background: transparent; border-radius: 50%; width: 48px; height: 48px; font-size: 22px; }
.arrow-button:hover { background: var(--button-hover); }
#slide-counter { font-size: 13px; min-width: 78px; text-align: center; font-variant-numeric: tabular-nums; }
.slide[data-returned="true"] { grid-template-columns: 1fr; text-align: center; place-items: center; background: var(--mint); }
.slide[data-returned="true"] .slide-art { display: none; }
.slide[data-returned="true"] .slide-copy { max-width: 680px; }
.history-illustration { position: relative; width: 100%; min-width: 0; height: 100%; max-height: 520px; display: flex; flex-direction: column; gap: 8px; }
.history-visual { flex: 1; min-height: 0; container-type: size; }
.history-visual > svg { display: block; width: 100%; height: 100%; touch-action: pan-y; }
.diagram-rule { fill: none; stroke: var(--border); stroke-width: 1; }
.diagram-guide { fill: none; stroke: var(--border); stroke-width: 1; stroke-dasharray: 3 5; }
.diagram-trail { fill: none; stroke-width: 3; stroke-linecap: round; }
.coordinate-label { font: 13px Consolas, monospace; fill: var(--ink); }
.point-label { font: 11px Consolas, monospace; fill: var(--muted); }
.angle-label { font: 19px Consolas, monospace; fill: var(--ink); }
.motion-control { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 12px; min-height: 28px; }
.motion-control span { flex-shrink: 0; }
.motion-control input { width: 100%; min-width: 0; accent-color: var(--accent); }
.animation-button { align-self: flex-start; min-height: 44px; border: 0; border-bottom: 1px solid var(--accent); border-radius: 0; padding: 8px 0; background: transparent; color: var(--accent); font: 12px/1.6 Consolas, monospace; }
.animation-button::before { content: ""; display: inline-block; width: 0; height: 0; margin-right: 10px; border-left: 6px solid currentColor; border-block: 4px solid transparent; }
.animation-button[aria-pressed="true"]::before { width: 6px; height: 8px; border-inline: 2px solid currentColor; border-block: 0; }
.history-grid { position: relative; display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); grid-template-rows: repeat(6, minmax(0, 1fr)); width: min(100cqw, 100cqh); height: min(100cqw, 100cqh); container-type: inline-size; aspect-ratio: 1; margin-inline: auto; border: 1px solid var(--grid-lines); border-radius: 8px; overflow: hidden; background-image: linear-gradient(var(--grid-lines) 1px, transparent 1px), linear-gradient(90deg, var(--grid-lines) 1px, transparent 1px); background-size: calc(100% / 6) calc(100% / 6); }
.grid-route { position: absolute; inset: 0; width: 100%; height: 100%; fill: none; stroke: var(--border); stroke-width: 1; pointer-events: none; }
.grid-route-progress { stroke: var(--accent); stroke-width: 2; }
.grid-marker { position: absolute; z-index: 2; width: 3cqw; height: 3cqw; border-radius: 50%; background: var(--accent); border: 2px solid var(--paper); transform: translate(-50%, -50%); pointer-events: none; }
.history-grid button { z-index: 1; margin: 3px; padding: 2px; border: 1px solid #245e51; border-radius: 2px; background: #dce9df; color: #12311b; font-weight: 500; font-family: Consolas, monospace; font-size: 8cqw; line-height: 1; min-width: 0; min-height: 0; aspect-ratio: 1; }
.history-grid button small { display: block; font: 2.3cqw Consolas, monospace; white-space: nowrap; }
.history-grid [data-cell="first"] { grid-column: 3; grid-row: 3; }
.history-grid [data-cell="second"] { grid-column: 4; grid-row: 3; }
.history-grid [data-cell="cancel"] { grid-column: 4; grid-row: 4; background: #eedbd4; border-color: #914b3c; }
.history-grid [data-cell="trigger"] { grid-column: 5; grid-row: 3; background: #eee0bd; border-color: #846119; }
.history-grid [data-cell="condition"] { grid-column: 6; grid-row: 3; background: #e4ddea; border-color: #65506c; display: grid; place-items: center; padding: 0; }
.history-grid[data-stage="condition"] [data-cell="condition"] { grid-column: 5; }
.history-grid [data-condition-content].is-thumb { font-family: system-ui, sans-serif; font-size: 8cqw; }
.history-grid .is-complete { background: #245e51; color: white; }
.history-grid .is-active { outline: 3px solid var(--ink); outline-offset: -4px; }
.history-grid button:focus-visible { outline-offset: -5px; outline-color: #172620; }
.grid-outcome { height: 40px; flex-shrink: 0; margin: 0; display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 650; text-align: center; line-height: 1.25; }
.grid-outcome[data-result="gridTriggered"] { color: var(--detected-ink); }
.grid-outcome[data-result="gridCancelled"] { color: var(--cancelled-ink); }
.presence-section { min-height: 100svh; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; border-top: 1px solid var(--border); }
.presence-section :is(h2, .lead) { margin-inline: auto; }
.departure-art { width: min(360px, 100%); margin-top: 32px; color: var(--accent); }
.departure-art svg { width: 100%; display: block; fill: none; stroke: currentColor; stroke-width: 1.5; }
.presence-frame { stroke: var(--border); }
.presence-person { stroke-width: 2; }
.presence-trace { stroke-dasharray: 4 5; }
.presence-empty { stroke: var(--muted); }
.finale { border-top: 1px solid var(--accent); padding: 48px 0; margin-bottom: 64px; }
.finale > p:not(.eyebrow) { color: var(--muted); font-size: 17px; line-height: 1.7; margin: 16px 0 28px; }
.finale .button { margin: 0 8px 12px 0; }
.footer { display: flex; justify-content: space-between; gap: 24px; align-items: center; padding: 28px 0 40px; border-top: 1px solid var(--border); font-size: 12px; color: var(--muted); }
.footer nav { flex-wrap: wrap; gap: 18px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip-link { position: fixed; top: 12px; left: 16px; z-index: 250; padding: 12px 20px; border-radius: 6px; background: var(--surface); color: var(--ink); transform: translateY(-200%); }
.skip-link:focus { transform: none; }
/* Cues are finite demonstrations; written instructions remain visible. */
.gesture-tip { position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%); z-index: 20; display: flex; align-items: center; gap: 10px; width: max-content; max-width: calc(100% - 32px); padding: 10px 16px; border: 1px solid var(--border); border-radius: 10px; color: var(--ink); background: var(--surface); font-size: 13px; pointer-events: none; }
.gesture-tip [data-text$="Short"] { position: static; width: auto; height: auto; clip-path: none; white-space: normal; }
.gesture-pictogram { display: flex; align-items: center; flex-shrink: 0; gap: 6px; }
.gesture-pictogram svg { width: 28px; height: 34px; fill: var(--accent); stroke: var(--paper); stroke-width: 2; }
.person-leaving .person-outline { stroke: var(--paper); }
.gesture-arrow { font-size: 24px; }
#scroll-gesture-tip[data-direction="down"] .gesture-arrow { transform: rotate(180deg); }
#scroll-gesture-tip .hand-up-right, .slide-tip .hand-right { display: none; }
.directional-hand::before { content: "←"; font-size: 24px; color: var(--accent); }
#page-content:has(.recovering-hands) :is(#scroll-gesture-tip, #slide-gesture-tip) { visibility: hidden; }
#navigation-cooldown { position: fixed; top: 0; left: 0; width: 100%; height: 3px; background: var(--border); z-index: 40; pointer-events: none; }
#navigation-cooldown [data-cooldown-progress] { width: 100%; height: 100%; transform: scaleX(0); transform-origin: left; background: var(--accent); }
#navigation-edge { position: fixed; inset: 0; pointer-events: none; z-index: 35; opacity: 0; }
#navigation-edge[data-direction="top"] { border-top: 3px solid var(--accent); }
#navigation-edge[data-direction="bottom"] { border-bottom: 3px solid var(--accent); }
#navigation-edge[data-direction="left"] { border-left: 3px solid var(--accent); }
#navigation-edge[data-direction="right"] { border-right: 3px solid var(--accent); }
#assistance { pointer-events: none; }
.assistance-shade { position: fixed; inset: 0; z-index: 35; background: #020713a6; }
.assistance-highlight { position: relative; z-index: 36; outline: 2px solid var(--accent); outline-offset: 4px; }
#presentation.assistance-highlight { outline: none; }
#navigation-cooldown.assistance-highlight { position: fixed; z-index: 40; }
.assistance-bubble { position: fixed; z-index: 38; bottom: 16px; left: 50%; transform: translateX(-50%); width: min(540px, calc(100% - 32px)); max-height: min(45svh, 360px); overflow: auto; overscroll-behavior: contain; padding: 20px; border: 1px solid var(--border); border-top: 3px solid var(--accent); border-radius: 3px; color: var(--ink); background: var(--paper); pointer-events: auto; box-shadow: 0 12px 40px #0003; }
.assistance-bubble h2 { font-size: 20px; margin: 0 0 10px; }
.assistance-bubble p { font-size: 15px; line-height: 1.6; margin: 0 0 12px; }
.assistance-bulb { float: right; display: grid; place-items: center; font: italic 18px Georgia, serif; color: var(--accent); width: 28px; height: 28px; border: 1px solid var(--border); border-radius: 50%; margin-left: 12px; }
.assistance-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.assistance-bubble [data-assistance-source] { display: inline-block; margin-bottom: 16px; color: var(--accent); font-size: 13px; }
.assistance-bubble .assistance-hint { color: var(--muted); }
.assistance-target { position: fixed; inset: 0; z-index: 39; container-type: size; }
.aim-outline { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); height: 30%; width: auto; aspect-ratio: 1; fill: none; stroke: #ffd878; stroke-width: 2; stroke-linejoin: round; filter: drop-shadow(0 1px 3px #000); }
.aim-left { left: 35%; } .aim-right { left: 65%; }
.phone .aim-left { left: 50%; }
.phone :is(.aim-right, [data-assistance-pointer-right], .hand-pair use + use) { display: none; }
.aim-circle { display: none; }
.aim-pointer { position: absolute; transform: translate(-50%, -50%); font-size: 60px; color: #80dfb0; }
.aim-hand { display: block; width: min(76px, 24cqh); height: min(76px, 24cqh); fill: currentColor; }
.aim-cross { display: none; }
#assistance[data-step="recover"] .aim-hand { display: none; }
#assistance[data-step="recover"] .aim-cross { display: block; }
.assistance-gesture { position: fixed; left: 50%; top: 42%; translate: -50% -50%; z-index: 37; display: flex; align-items: center; gap: 16px; color: #b7caff; }
.assistance-gesture svg { width: 60px; height: 60px; fill: currentColor; }
.assistance-gesture span { font-size: 40px; }
.assistance-gesture[data-direction="left"] span { rotate: 180deg; }
.assistance-gesture[data-direction="up"] span { rotate: -90deg; }
.assistance-gesture[data-direction="down"] span { rotate: 90deg; }
.hero.camera-open .camera-card.tutorial-camera { position: fixed; z-index: 36; top: 16px; left: 50%; margin: 0; width: min(520px, calc(100vw - 32px), calc(var(--tutorial-camera-height, 240px) * var(--camera-ratio, 1.333))); padding: 10px; transform: translateX(-50%); animation: none; }
.hero.camera-open .camera-card.recovering-hands { position: fixed; z-index: 40; top: auto; bottom: 16px; left: 50%; margin: 0; width: min(320px, calc(100vw - 32px), calc(36svh * var(--camera-ratio, 1.333))); padding: 8px; transform: translateX(-50%); animation: none; }
.camera-card.recovering-hands .camera-preview { aspect-ratio: var(--camera-ratio, 1.333); }
.camera-card.recovering-hands video { visibility: visible; }
.hero.camera-open .camera-card.recovering-hands.tutorial-camera { top: 16px; bottom: auto; width: min(520px, calc(100vw - 32px), calc(var(--tutorial-camera-height, 240px) * var(--camera-ratio, 1.333))); }
.recovering-hands #camera-status { display: none; }
#camera-recovery, #camera-hand-targets { position: absolute; inset: 0; pointer-events: none; }
:is(#camera-recovery, #camera-hand-targets) .recovery-left { left: 35%; }
:is(#camera-recovery, #camera-hand-targets) .recovery-right { left: 65%; }
.phone :is(#camera-recovery, #camera-hand-targets) .recovery-left { left: 50%; }
.phone :is(#camera-recovery, #camera-hand-targets) .recovery-right { display: none; }
body:has(#assistance:not([hidden])) #camera-hand-targets { display: none; }
#camera-recovery p { position: absolute; bottom: 8px; left: 8px; right: 8px; margin: 0; padding: 8px; border-radius: 5px; color: white; background: #142333e6; text-align: center; font-size: 13px; }
body.is-away { background: #000; }
#away-screen { position: fixed; inset: 0; background: #000; z-index: 100; opacity: 0; }
#away-screen.is-dark { opacity: 1; }
.away-exit { position: absolute; right: 20px; bottom: 20px; z-index: 2; padding: 12px 16px; min-height: 44px; border: 1px solid #677285; border-radius: 8px; color: #e9edf5; background: #131e20; font-size: 13px; }
#away-easter-egg { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
#away-easter-egg canvas { display: block; position: absolute; inset: 0; width: 100%; height: 100%; }
.away-reward { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); display: flex; align-items: center; gap: 16px; max-width: calc(100% - 40px); padding: 20px; border: 1px solid #677285; border-radius: 12px; color: #f8f5fc; background: #172131; }
.away-reward p { margin: 0; font-size: 22px; }
.away-egg { width: 40px; height: 50px; flex-shrink: 0; }
#camera-debug { position: fixed; z-index: 200; top: 12px; right: 12px; width: min(460px, calc(100vw - 24px)); max-height: calc(100svh - 24px); overflow: auto; overscroll-behavior: contain; padding: 12px; border: 1px solid var(--border); border-radius: 12px; color: var(--ink); background: var(--paper); box-shadow: 0 8px 32px #0003; font-size: 12px; }
#camera-debug header { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
#camera-debug button { min-height: 36px; border: 1px solid var(--border); border-radius: 6px; padding: 6px 10px; color: var(--ink); background: var(--button-hover); }
#camera-debug canvas { position: static; width: 100%; height: auto; transform: none; display: block; border-radius: 6px; }
#camera-debug fieldset { display: grid; gap: 6px; margin: 10px 0; padding: 8px; border: 1px solid var(--border); border-radius: 6px; }
#camera-debug label { display: flex; align-items: center; gap: 8px; }
#camera-debug pre { white-space: pre-wrap; font-size: 11px; line-height: 1.6; }
#camera-debug ol { padding-left: 24px; margin-bottom: 0; }
@media (max-width: 800px) {
    .header, .section, .footer { width: calc(100% - 40px); }
    .header { min-height: 88px; gap: 12px; }
    .brand { font-size: 13px; gap: 8px; }
    .brand-caption, .header nav > a { display: none; }
    .header nav { gap: 8px; }
    .hero { grid-template-columns: 1fr; min-height: calc(100svh - 88px); padding-block: 40px; gap: 40px; }
    .hero h1 { font-size: clamp(44px, 7vw, 64px); }
    .motion-study { max-width: 320px; justify-self: center; }
    .motion-study figcaption { flex-direction: column; gap: 6px; }
    .hero-facts { gap: 12px; font-size: 11px; }
    .hero.camera-open { grid-template-columns: 1fr; gap: 20px; padding-block: 20px; }
    .hero.camera-open .hero-copy > .eyebrow { display: none; }
    .hero.camera-open .camera-actions { margin-top: 0; }
    .hero.camera-open .camera-placement { margin-bottom: 0; font-size: 14px; }
    .camera-card { max-width: 520px; }
    .section { padding-block: 48px; }
    .slideshow-section { padding-block: 24px; }
    .slideshow-section h2 { font-size: 30px; margin-bottom: 12px; }
    .slideshow-section > .manual-hint { font-size: 12px; margin: 0 0 12px; }
    .carousel-track { height: 500px; }
    .slide { grid-template-columns: 1fr; grid-template-rows: auto minmax(0, 1fr); padding: 20px; gap: 16px; }
    .slide-art { padding-left: 0; border-left: 0; }
    .slide h3 { font-size: 26px; margin: 10px 0; }
    .slide-tag { margin: 0; }
    .slide-copy > p:last-child { font-size: 14px; line-height: 1.6; margin: 0; }
    .history-illustration { max-height: 300px; }
    .slide[data-returned="true"] { grid-template-rows: 1fr; }
    .grid-outcome { height: 32px; font-size: 18px; }
    .footer { flex-direction: column; align-items: flex-start; }
    .finale { padding: 28px 0; }
    .assistance-bubble { padding: 16px; }
    .assistance-actions .button { padding: 10px 14px; font-size: 13px; }
}
@media (max-width: 800px) and (max-height: 740px) {
    .carousel-track { height: 440px; }
    .slideshow-section h2 { font-size: 26px; }
}
@media (min-width: 801px) and (max-height: 600px) {
    .carousel-track { height: 265px; }
    .slide { padding: 20px; gap: 24px; }
    .slide h3 { font-size: 24px; margin: 12px 0; }
    .slide-copy > p:last-child { font-size: 14px; line-height: 1.5; }
    .slideshow-section { padding-block: 24px; }
    .slideshow-section h2 { font-size: 28px; margin-bottom: 12px; }
    .slideshow-section > .manual-hint { font-size: 12px; margin: 0 0 8px; }
}
@media (max-width: 360px) {
    .header, .section, .footer { width: calc(100% - 32px); }
    .brand-mark { display: none; }
    .camera-actions { flex-direction: column; align-items: stretch; }
    .guided-start .button { width: 100%; }
    .slide { padding: 16px; }
}
@media (prefers-reduced-motion: no-preference) {
    .grid-marker { transition: left 400ms cubic-bezier(.22,1,.36,1), top 400ms cubic-bezier(.22,1,.36,1); }
    .history-grid button { transition: background-color 220ms ease, color 220ms ease; }
    html { scroll-behavior: smooth; }
    .button, .arrow-button, .theme-toggle { transition: background-color 160ms ease, border-color 160ms ease; }
    .camera-open .camera-card:not(.tutorial-camera):not(.recovering-hands) { animation: camera-arrive 240ms ease-out both; }
    #away-screen { transition: opacity 300ms ease; }
    .hand-left svg { animation: cue-horizontal 1.8s ease-in-out 2; }
    .hand-up-left svg { animation: cue-up 1.8s ease-in-out 2; }
    #scroll-gesture-tip[data-direction="down"] .hand-up-left svg { animation-name: cue-down; }
    .hand-cover svg { animation: cue-cover 1.8s ease-in-out 2; }
    .assistance-gesture { animation: cue-right 2s ease-in-out 2; }
    .assistance-gesture[data-direction="left"] { animation-name: cue-horizontal; }
    .assistance-gesture[data-direction="up"] { animation-name: cue-up; }
    .assistance-gesture[data-direction="down"] { animation-name: cue-down; }
    @keyframes camera-arrive { from { opacity: 0; translate: 0 8px; } to { opacity: 1; translate: 0 0; } }
    @keyframes cue-horizontal { 0%, 100% { transform: translateX(0); } 50% { transform: translateX(-10px); } }
    @keyframes cue-right { 0%, 100% { transform: translateX(0); } 50% { transform: translateX(10px); } }
    @keyframes cue-up { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
    @keyframes cue-down { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(8px); } }
    @keyframes cue-cover { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.08); } }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}
@media (forced-colors: active) {
    .button, .arrow-button, .camera-preview, .history-grid button { border: 1px solid ButtonText; }
    .history-grid .is-active { outline-color: Highlight; }
}