/* Hallmark · genre: modern-minimal (dark lab) · macrostructure: Map / Diagram → interactive brief builder · theme: custom "lab instrument"
 * paper oklch(15.5% 0.012 250) · accent oklch(86% 0.155 165) signal mint · Space Grotesk + Inter + JetBrains Mono
 * enrichment: none (the map is the image) · nav: N5 Floating pill · footer: Ft1 Mast-headed · conversion: C4 sticky brief bar on mobile
 * Hallmark · pre-emit critique: P5 H4 E4 S5 R4 V5
 */

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { overflow-x: clip; }
html { scroll-behavior: smooth; scroll-padding-top: 6rem; -webkit-text-size-adjust: 100%; background: var(--color-paper); }
body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; }
h1, h2, h3 { margin: 0; font-family: var(--font-display); font-weight: 600; font-style: normal; color: var(--color-ink); overflow-wrap: anywhere; min-width: 0; }
::selection { background: var(--color-accent); color: var(--color-on-accent); }

:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; border-radius: var(--radius-sm); }

.skip {
  position: absolute; left: var(--space-sm); top: -4rem; z-index: 100;
  background: var(--color-accent); color: var(--color-on-accent);
  padding: var(--space-2xs) var(--space-sm); border-radius: var(--radius-md); text-decoration: none;
}
.skip:focus-visible { top: var(--space-sm); }

.shell { width: 100%; max-width: var(--page-max); margin-inline: auto; padding-inline: var(--gutter); }
.mono { font-family: var(--font-mono); font-size: var(--text-sm); letter-spacing: -0.01em; }

.display { font-size: var(--text-display); line-height: 1.02; letter-spacing: -0.035em; font-weight: 600; }
.h2 { font-size: var(--text-3xl); line-height: 1.1; letter-spacing: -0.025em; }
.h3 { font-size: var(--text-xl); line-height: 1.25; letter-spacing: -0.015em; font-weight: 500; }
.lede, .body-lg { font-size: var(--text-lg); line-height: 1.6; color: var(--color-ink-2); max-width: var(--measure); }
.lede a, .body-lg a { color: var(--color-ink); text-decoration-color: var(--color-accent); text-underline-offset: 3px; }

/* status LED */
.led { display: inline-block; flex: none; width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--color-accent); box-shadow: 0 0 8px var(--color-accent-line); }
.led-next { background: transparent; border: 1.5px solid var(--color-next); box-shadow: none; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2xs);
  min-height: 2.75rem; padding: 0 var(--space-md);
  border: var(--rule-hair) solid transparent; border-radius: var(--radius-pill);
  font: 600 var(--text-base)/1 var(--font-body); white-space: nowrap; text-decoration: none; cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.btn-sm { min-height: 2.25rem; padding: 0 var(--space-sm); font-size: var(--text-sm); }
.btn-primary { background: var(--color-accent); color: var(--color-on-accent); }
.btn-primary:hover { background: var(--color-accent-hover); }
.btn-quiet { background: transparent; color: var(--color-ink); border-color: var(--color-rule-strong); }
.btn-quiet:hover { background: var(--color-paper-2); border-color: var(--color-ink-3); }
.btn:active { transform: translateY(1px); }
.btn:disabled, .btn[aria-disabled="true"] { background: var(--color-paper-3); color: var(--color-ink-3); cursor: not-allowed; transform: none; }
.btn[data-state="loading"] .btn-label::before {
  content: ""; display: inline-block; width: 0.85em; height: 0.85em; margin-right: var(--space-2xs);
  border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%;
  vertical-align: -0.1em; animation: spin 700ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.cta-row { display: flex; flex-wrap: wrap; gap: var(--space-xs); margin-top: var(--space-lg); }

/* ---------- nav (N5 floating pill) ---------- */
.nav-wrap { position: sticky; top: var(--space-sm); z-index: 50; padding-inline: var(--gutter); }
.nav {
  display: flex; align-items: center; gap: var(--space-md);
  width: fit-content; max-width: 100%; margin-inline: auto;
  padding: var(--space-3xs) var(--space-3xs) var(--space-3xs) var(--space-sm);
  background: var(--color-nav-bg);
  -webkit-backdrop-filter: saturate(1.4) blur(14px); backdrop-filter: saturate(1.4) blur(14px);
  border: var(--rule-hair) solid var(--color-rule-strong); border-radius: var(--radius-pill);
  box-shadow: var(--shadow-float);
}
.wordmark { display: inline-flex; align-items: center; gap: var(--space-2xs); text-decoration: none; font: 600 var(--text-base)/1 var(--font-display); letter-spacing: -0.02em; white-space: nowrap; }
/* Junction mark: two inputs meet at one lit node and leave as one output */
.mark { width: 1.5rem; height: 1.5rem; flex: none; overflow: visible; }
.mark-line { fill: none; stroke: var(--color-ink); stroke-width: 3.4; stroke-linecap: round; stroke-linejoin: round; }
.mark-end { fill: var(--mark-hole, var(--color-paper)); stroke: var(--color-ink); stroke-width: 3; }
.mark-core { fill: var(--color-accent); filter: drop-shadow(0 0 3px var(--color-accent-line)); }
.wordmark-light { font-weight: 400; color: var(--color-ink-3); }
.nav .mark { --mark-hole: var(--color-paper); }
.wordmark:hover .mark-core { fill: var(--color-accent-hover); }
.nav-links { display: flex; gap: var(--space-3xs); }
.nav-links a {
  display: block; padding: var(--space-2xs) var(--space-xs); border-radius: var(--radius-pill);
  font-size: var(--text-sm); color: var(--color-ink-2); text-decoration: none; white-space: nowrap;
  transition: color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out);
}
.nav-links a:hover { color: var(--color-ink); background: var(--color-paper-3); }

/* ---------- hero ---------- */
.hero {
  position: relative;
  padding: var(--space-2xl) 0 var(--space-3xl);
  background-image:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: center top;
  border-bottom: var(--rule-hair) solid var(--color-rule);
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(180deg, var(--color-paper) 0%, transparent 18%, transparent 82%, var(--color-paper) 100%);
}
.hero > * { position: relative; z-index: 1; }
.hero-head {
  display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  grid-template-areas: "copy film" "hint film";
  grid-template-rows: 1fr auto;
  gap: var(--space-lg) var(--space-2xl); align-items: end;
}
.hero-copy { grid-area: copy; display: grid; gap: var(--space-md); align-content: end; }
.hero-copy .eyebrow { margin-bottom: 0; }
.hero-film { grid-area: film; width: 100%; max-width: 36rem; justify-self: end; }
.hero-head .hint { grid-area: hint; }
.hero-head .display { max-width: 12ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-xs); margin-top: var(--space-2xs); }
.btn-go svg { width: 1.1rem; height: 1.1rem; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; transition: transform var(--dur-base) var(--ease-out); }
.btn-go:hover svg, .btn-go:focus-visible svg { transform: translateX(3px); }
.eyebrow { display: inline-flex; align-items: center; gap: var(--space-2xs); margin-bottom: var(--space-md); color: var(--color-ink-2); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.08em; }
.hint { color: var(--color-accent); }

/* ---------- brief builder ---------- */
.builder { margin-top: var(--space-2xl); }
.builder-bar {
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: var(--space-xs) var(--space-lg);
  padding-bottom: var(--space-sm); border-bottom: var(--rule-hair) solid var(--color-rule-strong);
}
.map-title { color: var(--color-ink); }
.presets { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2xs); }
.presets-label { color: var(--color-ink-3); font-size: var(--text-xs); margin-right: var(--space-3xs); }
.preset {
  padding: 0.4rem var(--space-xs); border: var(--rule-hair) solid var(--color-rule-strong); border-radius: var(--radius-pill);
  background: var(--color-paper); color: var(--color-ink-2); font-size: var(--text-sm); white-space: nowrap; cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out);
}
.preset:hover { border-color: var(--color-ink-3); color: var(--color-ink); }
.preset[aria-pressed="true"] { border-color: var(--color-accent); color: var(--color-accent); background: var(--color-accent-dim); }
.preset:active { transform: translateY(1px); }

.builder-body { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 20rem); gap: var(--space-xl); padding-top: var(--space-xl); align-items: start; }

.map { position: relative; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-xl); }
.map-wires { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; overflow: visible; }
.map-wires path { fill: none; stroke-width: 1.5; transition: stroke var(--dur-base) var(--ease-out), opacity var(--dur-base) var(--ease-out), stroke-width var(--dur-base) var(--ease-out); }
.map-wires .wire-live { stroke: var(--color-rule-strong); }
.map-wires .wire-next { stroke: var(--color-rule-strong); stroke-dasharray: 4 5; }
.map-wires path.is-on { stroke: var(--color-accent); stroke-width: 2; stroke-dasharray: 6 6; animation: flow 900ms linear infinite; }
.map-wires path.is-hover { stroke: var(--color-ink-2); }
@keyframes flow { to { stroke-dashoffset: -12; } }

.map-col { position: relative; display: flex; flex-direction: column; gap: var(--space-xs); min-width: 0; padding-top: var(--space-lg); }
.map-core { justify-content: center; align-self: stretch; }
.col-label { position: absolute; top: 0; left: 0; font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-ink-3); }

.node {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: minmax(0, 1fr) auto; grid-template-rows: auto auto; column-gap: var(--space-xs); row-gap: 2px;
  width: 100%; padding: var(--space-xs) var(--space-sm);
  background: var(--color-panel); text-align: left; cursor: pointer;
  border: var(--rule-hair) solid var(--color-rule-strong); border-radius: var(--radius-md);
  transition: border-color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-base) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.node::after {
  /* status LED + selection check */
  content: ""; grid-column: 2; grid-row: 1 / span 2; align-self: center;
  width: 1.125rem; height: 1.125rem; border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-rule-strong);
  transition: background-color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.node.is-next { border-style: dashed; }
.node-core { padding-block: var(--space-sm); }
.node-name { font: 500 var(--text-base)/1.3 var(--font-display); letter-spacing: -0.01em; color: var(--color-ink); }
.node-meta { font: 400 var(--text-xs)/1.4 var(--font-mono); color: var(--color-ink-3); }
.node-name::before {
  content: ""; display: inline-block; width: 0.4rem; height: 0.4rem; margin-right: var(--space-2xs); vertical-align: 0.15em; border-radius: 50%;
  background: var(--color-accent); box-shadow: 0 0 6px var(--color-accent-line);
}
.node.is-next .node-name::before { background: transparent; border: 1.5px solid var(--color-next); box-shadow: none; }
.node:hover { border-color: var(--color-ink-3); background: var(--color-paper-2); }
.node:active { transform: translateY(1px); }
.node[aria-pressed="true"] { border-color: var(--color-accent); border-style: solid; background: var(--color-accent-dim); box-shadow: var(--glow-accent); }
.node[aria-pressed="true"]::after {
  border-color: var(--color-accent);
  background: var(--color-accent) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 8.5l2.5 2.5L12 5.5' fill='none' stroke='%23062a1e' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 80% no-repeat;
}

/* brief panel */
.brief {
  position: sticky; top: 6rem;
  display: grid; gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--color-panel); border: var(--rule-hair) solid var(--color-rule-strong); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-float);
}
.brief-head { display: flex; justify-content: space-between; align-items: center; }
.brief-title { font-size: var(--text-xs); font-weight: 500; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-accent); }
.brief-clear { background: none; border: 0; padding: var(--space-3xs) 0; color: var(--color-ink-3); font-size: var(--text-xs); cursor: pointer; text-decoration: underline; text-underline-offset: 3px; }
.brief-clear:hover { color: var(--color-ink); }
.brief-text { color: var(--color-ink); font-size: var(--text-base); line-height: 1.55; min-height: 4.5em; }
.brief-text.is-empty { color: var(--color-ink-3); }
.brief-meter { display: grid; gap: var(--space-3xs); font-size: var(--text-xs); color: var(--color-ink-2); }
.brief-meter li { display: flex; align-items: center; gap: var(--space-2xs); }
.brief-sweep { font-size: var(--text-sm); color: var(--color-accent); padding: var(--space-2xs) var(--space-xs); border: var(--rule-hair) solid var(--color-accent-line); border-radius: var(--radius-md); background: var(--color-accent-dim); }
.brief-cta { width: 100%; }
.legend { display: flex; flex-wrap: wrap; gap: var(--space-3xs) var(--space-md); font-size: var(--text-xs); color: var(--color-ink-3); padding-top: var(--space-2xs); border-top: var(--rule-hair) solid var(--color-rule); }
.legend-item { display: inline-flex; align-items: center; gap: var(--space-2xs); white-space: nowrap; }
.key { display: inline-block; width: 1.25rem; height: 0; border-top: 1.5px solid var(--color-ink-3); }
.key-next { border-top-style: dashed; }

/* ---------- sections ---------- */
.section { padding-block: var(--space-3xl); }
.section-alt { background: var(--color-paper-2); border-block: var(--rule-hair) solid var(--color-rule); }
.section-head { display: grid; gap: var(--space-sm); max-width: 44rem; margin-bottom: var(--space-xl); }

/* Sweep intro */
.sweep-intro { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-2xl); align-items: end; margin-bottom: var(--space-xl); }
.split-copy { display: grid; gap: var(--space-md); }
.split-copy .cta-row { margin-top: 0; align-items: center; gap: var(--space-md); }
.product-tag { display: inline-flex; align-items: center; gap: var(--space-2xs); font: 500 var(--text-sm)/1 var(--font-mono); color: var(--color-ink-2); }
.dot { width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--color-accent); box-shadow: 0 0 8px var(--color-accent-line); }

.spec { margin: 0; border-top: var(--rule-hair) solid var(--color-rule-strong); }
.spec-row { display: grid; grid-template-columns: 8rem minmax(0, 1fr); gap: var(--space-md); padding-block: var(--space-sm); border-bottom: var(--rule-hair) solid var(--color-rule); }
.spec dt { font: 500 var(--text-sm)/1.6 var(--font-mono); color: var(--color-accent); }
.spec dd { margin: 0; color: var(--color-ink-2); }

/* Sweep film */
.film { margin: 0; display: grid; gap: var(--space-xs); }
.film-frame { position: relative; aspect-ratio: 1; border: var(--rule-hair) solid var(--color-rule-strong); border-radius: var(--radius-lg); overflow: hidden; background: var(--color-paper); box-shadow: var(--shadow-float); }
.film-video { display: block; width: 100%; height: 100%; object-fit: cover; }
.film-toggle { position: absolute; right: var(--space-sm); bottom: var(--space-sm); display: grid; place-items: center; width: 2.75rem; height: 2.75rem; border: var(--rule-hair) solid var(--color-rule-strong); border-radius: 50%; background: oklch(15.5% 0.012 250 / 0.72); backdrop-filter: blur(6px); color: var(--color-ink); cursor: pointer; opacity: 0; transition: opacity var(--dur-base) var(--ease-out), background-color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out); }
.film-toggle svg { width: 1.1rem; height: 1.1rem; fill: currentColor; }
.film-toggle .ic-pause { display: none; }
.film.is-playing .film-toggle .ic-play { display: none; }
.film.is-playing .film-toggle .ic-pause { display: block; }
.film:not(.is-playing) .film-toggle, .film-frame:hover .film-toggle, .film-toggle:focus-visible { opacity: 1; }
.film-toggle-label { display: none; font: 600 var(--text-sm)/1 var(--font-body); white-space: nowrap; }
.film:not(.is-playing) .film-toggle { display: inline-flex; align-items: center; gap: var(--space-2xs); width: auto; padding: 0 var(--space-sm) 0 var(--space-xs); border-radius: var(--radius-pill); background: var(--color-accent); border-color: var(--color-accent); color: var(--color-on-accent); }
.film:not(.is-playing) .film-toggle-label { display: inline; }
.film-toggle:hover { background: var(--color-paper-3); }
.film:not(.is-playing) .film-toggle:hover { background: var(--color-accent-hover); }
.film-toggle:active { transform: translateY(1px); }
.film-toggle:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; }
@media (hover: none) { .film.is-playing .film-toggle { opacity: 0.85; } }
.film-cap { display: flex; align-items: center; gap: var(--space-2xs); font-size: var(--text-xs); color: var(--color-ink-3); }

.note {
  padding: var(--space-sm) var(--space-md);
  border-left: 2px solid var(--color-accent); background: var(--color-paper-2);
  border-radius: 0 var(--radius-md) var(--radius-md) 0; color: var(--color-ink); font-size: var(--text-sm);
}
.sweep-note { margin-top: var(--space-md); max-width: var(--measure); }
.platforms { color: var(--color-ink-3); white-space: nowrap; }

/* Shift player */
.player {
  border: var(--rule-hair) solid var(--color-rule-strong); border-radius: var(--radius-lg);
  background:
    linear-gradient(var(--color-grid) 1px, transparent 1px) 0 0 / 32px 32px,
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px) 0 0 / 32px 32px,
    var(--color-panel);
  overflow: hidden;
}
.player-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: var(--space-2xs) var(--space-md); padding: var(--space-md) var(--space-lg); border-bottom: var(--rule-hair) solid var(--color-rule); background: var(--color-panel); }
.player-note { font-size: var(--text-xs); color: var(--color-ink-3); }

.player-stage {
  display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: var(--space-xl); align-items: center; padding: var(--space-lg);
}
.shift-film { margin: 0; aspect-ratio: 1280 / 1080; border: var(--rule-hair) solid var(--color-rule-strong); border-radius: var(--radius-md); overflow: hidden; background: var(--color-paper); box-shadow: var(--shadow-float); }
.shift-video { display: block; width: 100%; height: 100%; object-fit: cover; cursor: pointer; }

.player-story { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-sm); align-content: center; min-height: 26rem; }
.clock { font-size: var(--text-3xl); font-weight: 500; letter-spacing: -0.03em; color: var(--color-accent); line-height: 1; }
.story-title { font: 600 var(--text-2xl)/1.15 var(--font-display); letter-spacing: -0.02em; }
.story-text { color: var(--color-ink-2); font-size: var(--text-lg); max-width: 40ch; }
.log { display: grid; gap: var(--space-3xs); margin-top: var(--space-xs); padding-top: var(--space-sm); border-top: var(--rule-hair) dashed var(--color-rule-strong); font-size: var(--text-xs); }
.log:empty { display: none; }
.log li { display: grid; grid-template-columns: 3.25rem minmax(0, 1fr); gap: var(--space-xs); color: var(--color-ink-3); }
.log li:last-child { color: var(--color-ink); }
.log time { color: var(--color-ink-3); }
.log li:last-child time { color: var(--color-accent); }
.player-end { display: grid; gap: var(--space-sm); padding: var(--space-md); border: var(--rule-hair) solid var(--color-accent-line); border-radius: var(--radius-md); background: var(--color-accent-dim); }
.player-end .cta-row { margin-top: 0; }

.transport { display: flex; align-items: center; gap: var(--space-md); padding: var(--space-sm) var(--space-lg); border-top: var(--rule-hair) solid var(--color-rule); background: var(--color-panel); }
.play {
  flex: none; display: grid; place-items: center; width: 3rem; height: 3rem; border-radius: 50%;
  background: var(--color-accent); color: var(--color-on-accent); border: 0; cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.play:hover { background: var(--color-accent-hover); }
.play:active { transform: scale(0.96); }
.play svg { width: 1.25rem; height: 1.25rem; fill: currentColor; }
.play .ic-pause, .player.is-playing .play .ic-play { display: none; }
.player.is-playing .play .ic-pause { display: block; }

.chapters { flex: 1; display: grid; grid-auto-flow: column; grid-auto-columns: minmax(0, 1fr); gap: var(--space-2xs); min-width: 0; }
.chapter {
  position: relative; display: grid; gap: 2px; width: 100%; padding: var(--space-xs) 0 0; text-align: left;
  background: none; border: 0; cursor: pointer; color: var(--color-ink-3);
}
.chapter::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; border-radius: 2px; background: var(--color-rule-strong); }
.chapter-fill { position: absolute; top: 0; left: 0; right: 0; height: 3px; border-radius: 2px; background: var(--color-accent); transform: scaleX(0); transform-origin: left; }
.chapter.is-done .chapter-fill { transform: scaleX(1); }
.chapter.is-active .chapter-fill { transform: scaleX(var(--progress, 0)); }
.chapter-time { font: 500 var(--text-xs)/1.2 var(--font-mono); }
.chapter-name { font-size: var(--text-sm); line-height: 1.3; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chapter:hover { color: var(--color-ink-2); }
.chapter[aria-current="step"] { color: var(--color-ink); }
.chapter[aria-current="step"] .chapter-time { color: var(--color-accent); }

/* Work — live bench */
.bench { border: var(--rule-hair) solid var(--color-rule-strong); border-radius: var(--radius-lg); background: var(--color-panel); overflow: hidden; }
.bench-bar { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-xs); padding: var(--space-sm) var(--space-md); border-bottom: var(--rule-hair) solid var(--color-rule); }
.seg { display: inline-flex; padding: 3px; gap: 2px; border: var(--rule-hair) solid var(--color-rule-strong); border-radius: var(--radius-pill); background: var(--color-paper); max-width: 100%; }
.seg-btn {
  display: inline-flex; align-items: center; gap: var(--space-2xs); padding: 0.4rem var(--space-sm);
  border: 0; border-radius: var(--radius-pill); background: none; color: var(--color-ink-2);
  font-size: var(--text-sm); white-space: nowrap; cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.seg-btn svg { width: 1rem; height: 1rem; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; }
.seg-btn:hover { color: var(--color-ink); }
.seg-btn[aria-pressed="true"] { background: var(--color-paper-3); color: var(--color-ink); }
.seg-btn:active { transform: translateY(1px); }

.bench-body { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 20rem); }
.viewer { display: grid; gap: var(--space-2xs); padding: var(--space-md); border-right: var(--rule-hair) solid var(--color-rule);
  background:
    linear-gradient(var(--color-grid) 1px, transparent 1px) 0 0 / 32px 32px,
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px) 0 0 / 32px 32px; }
.viewer-canvas {
  position: relative; aspect-ratio: 16 / 10; overflow: hidden; margin-inline: auto; width: 100%;
  border: var(--rule-hair) solid var(--color-rule-strong); border-radius: var(--radius-md); background: var(--color-paper-3);
  transition: width var(--dur-slow) var(--ease-out);
}
.viewer[data-view="phone"] .viewer-canvas { width: auto; height: min(42rem, 70vh); aspect-ratio: 390 / 780; border-radius: 1.5rem; }
.viewer-poster { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.viewer-frame { position: absolute; top: 0; left: 0; border: 0; transform-origin: 0 0; background: var(--color-shot-bg); }
.viewer-go {
  position: absolute; left: 50%; bottom: var(--space-md); transform: translateX(-50%);
  display: inline-flex; align-items: center; gap: var(--space-2xs); padding: 0.7rem var(--space-md);
  border: var(--rule-hair) solid var(--color-accent-line); border-radius: var(--radius-pill);
  background: var(--color-nav-bg); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  color: var(--color-ink); font-weight: 600; white-space: nowrap; cursor: pointer; box-shadow: var(--shadow-float);
  transition: border-color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out);
}
.viewer-go:hover { border-color: var(--color-accent); background: var(--color-paper-2); }
.viewer-go:active { transform: translateX(-50%) translateY(1px); }
.viewer-note { text-align: center; font-size: var(--text-xs); color: var(--color-ink-3); }
.viewer.is-loading .viewer-canvas::after {
  content: "Loading the live site"; position: absolute; inset: auto 0 var(--space-md); text-align: center;
  font: 400 var(--text-xs)/1 var(--font-mono); color: var(--color-ink-2);
}

.bench-info { display: grid; gap: var(--space-xs); align-content: start; padding: var(--space-lg) var(--space-md); }
.bench-desc { color: var(--color-ink-2); }
.bench-cta { display: grid; gap: var(--space-xs); margin-top: var(--space-md); padding-top: var(--space-md); border-top: var(--rule-hair) solid var(--color-rule); }
.bench-cta p { font-size: var(--text-sm); color: var(--color-ink-2); }
.bench-cta .btn { justify-self: start; }
.work-place { color: var(--color-ink-3); }
.tags { display: flex; flex-wrap: wrap; gap: var(--space-3xs) var(--space-2xs); }
.tags li { font: 400 var(--text-xs)/1 var(--font-mono); padding: var(--space-2xs) var(--space-xs); border: var(--rule-hair) solid var(--color-rule-strong); border-radius: var(--radius-sm); color: var(--color-ink-2); white-space: nowrap; }
.link-arrow { justify-self: start; font: 500 var(--text-sm)/1.4 var(--font-mono); color: var(--color-accent); text-decoration: none; white-space: nowrap; }
.link-arrow::after { content: " ↗"; }
.link-arrow:hover { text-decoration: underline; text-underline-offset: 3px; }

/* Services */
.services { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: var(--rule-hair) solid var(--color-ink-3); }
.service { display: grid; gap: var(--space-sm); align-content: start; padding: var(--space-md) var(--space-md) var(--space-lg) 0; }
.service + .service { padding-left: var(--space-md); border-left: var(--rule-hair) solid var(--color-rule); }
.service p { color: var(--color-ink-2); }
.status { justify-self: start; display: inline-flex; align-items: center; gap: var(--space-2xs); font: 500 var(--text-xs)/1 var(--font-mono); padding: 0.35rem var(--space-2xs); border-radius: var(--radius-sm); white-space: nowrap; }
.status::before { content: ""; width: 0.4rem; height: 0.4rem; border-radius: 50%; }
.status-live { color: var(--color-accent); background: var(--color-accent-dim); }
.status-live::before { background: var(--color-accent); }
.status-next { color: var(--color-next); background: var(--color-next-dim); }
.status-next::before { border: 1.5px solid var(--color-next); }
.aside { margin-top: var(--space-lg); max-width: var(--measure); color: var(--color-ink-2); font-size: var(--text-sm); }

/* Rule bench */
.rules { margin-top: var(--space-xl); border: var(--rule-hair) solid var(--color-rule-strong); border-radius: var(--radius-lg); background: var(--color-paper-2); overflow: clip; }
.rules-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: end; gap: var(--space-xs) var(--space-md); padding: var(--space-md) var(--space-lg); border-bottom: var(--rule-hair) solid var(--color-rule); background: var(--color-panel); }
.rules-kicker { display: flex; align-items: center; gap: var(--space-xs); margin-bottom: var(--space-2xs); font-size: var(--text-xs); color: var(--color-ink-3); }
.rules-note { font-size: var(--text-xs); color: var(--color-ink-3); }
.rules-body { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); }
.rules-pick { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.rule-col { margin: 0; padding: var(--space-md); border: 0; min-width: 0; }
.rule-col + .rule-col { border-left: var(--rule-hair) solid var(--color-rule); }
.rule-legend { float: left; width: 100%; display: flex; align-items: center; gap: var(--space-2xs); padding: 0; margin-bottom: var(--space-sm); font-size: var(--text-xs); color: var(--color-ink-2); text-transform: uppercase; letter-spacing: 0.08em; }
.rule-step { display: inline-grid; place-items: center; width: 1.25rem; height: 1.25rem; border: var(--rule-hair) solid var(--color-rule-strong); border-radius: 50%; font-size: 0.7rem; color: var(--color-ink-3); }
.rule-opts { clear: both; display: grid; gap: var(--space-2xs); }
.rule-opt { position: relative; display: grid; gap: 0.15rem; padding: var(--space-xs) var(--space-sm); border: var(--rule-hair) solid var(--color-rule); border-radius: var(--radius-md); background: var(--color-paper); cursor: pointer; transition: border-color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out); }
.rule-opt input { position: absolute; opacity: 0; pointer-events: none; }
.rule-opt-name { font-size: var(--text-sm); font-weight: 600; color: var(--color-ink); }
.rule-opt-meta { font: 400 var(--text-xs)/1.4 var(--font-mono); color: var(--color-ink-3); }
.rule-opt:hover { border-color: var(--color-ink-3); }
.rule-opt:has(input:checked) { border-color: var(--color-accent-line); background: var(--color-accent-dim); }
.rule-opt:has(input:checked) .rule-opt-meta { color: var(--color-accent); }
.rule-opt:has(input:focus-visible) { outline: 2px solid var(--color-focus); outline-offset: 2px; }
.rules-out { min-width: 0; display: grid; align-content: start; gap: var(--space-sm); padding: var(--space-md) var(--space-lg); border-left: var(--rule-hair) solid var(--color-rule); background: var(--color-paper); }
.rules-out-label { font-size: var(--text-xs); color: var(--color-ink-3); }
.rule-sentence { margin: 0; overflow-wrap: anywhere; font: 600 var(--text-xl)/1.3 var(--font-display); letter-spacing: -0.01em; color: var(--color-ink-2); }
.rule-sentence b { font-weight: 600; color: var(--color-ink); }
.rule-sentence .k { font: 500 0.7em/1 var(--font-mono); color: var(--color-accent); text-transform: uppercase; letter-spacing: 0.06em; }
.rule-log { min-height: 7.5rem; align-content: start; }
.rule-log:empty { display: grid; }
.rule-log li { animation: rule-in var(--dur-base) var(--ease-out) both; }
.rule-log li.is-skip { color: var(--color-ink-3); }
@keyframes rule-in { from { opacity: 0; transform: translateY(4px); } }
.rules-cta { margin-top: var(--space-2xs); }

/* Approach */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-lg); }
.step { display: grid; gap: var(--space-xs); align-content: start; padding-top: var(--space-sm); border-top: 2px solid var(--color-accent); }
.step-n { color: var(--color-accent); }
.step p { color: var(--color-ink-2); }

/* Enquiry */
.enquire { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: var(--space-2xl); align-items: start; }
.enquire-copy { display: grid; gap: var(--space-md); position: sticky; top: 7rem; }
.contact-line a { color: var(--color-accent); text-underline-offset: 3px; }

/* What happens next: a rail that draws down as the steps arrive */
.next-steps { position: relative; display: grid; gap: var(--space-md); margin-top: var(--space-sm); padding-left: 2.75rem; }
.next-steps::before { content: ""; position: absolute; left: 0.95rem; top: 0.6rem; bottom: 0.6rem; width: 1px; background: linear-gradient(var(--color-accent), var(--color-accent-line)); transform-origin: top; }
.next-steps li { position: relative; }
.next-n { position: absolute; left: -2.75rem; top: -0.1rem; display: grid; place-items: center; width: 1.9rem; height: 1.9rem; border-radius: 50%; border: var(--rule-hair) solid var(--color-accent-line); background: var(--color-paper); color: var(--color-accent); font-size: var(--text-xs); }
.next-steps p { display: grid; gap: var(--space-3xs); color: var(--color-ink-2); }
.next-steps strong { color: var(--color-ink); font-weight: 600; }
.next-steps[data-armed]::before { transform: scaleY(0); transition: transform 900ms var(--ease-out); }
.next-steps[data-armed] li { opacity: 0; transform: translateY(8px); transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out); }
.next-steps[data-armed] li:nth-child(2) { transition-delay: 220ms; }
.next-steps[data-armed] li:nth-child(3) { transition-delay: 440ms; }
.next-steps.is-in::before { transform: scaleY(1); }
.next-steps.is-in li { opacity: 1; transform: none; }

.form {
  display: grid; gap: var(--space-md);
  padding: var(--space-lg); border: var(--rule-hair) solid var(--color-rule-strong); border-radius: var(--radius-lg);
  background: var(--color-panel);
}
.form.is-flash { animation: flash 1200ms var(--ease-out) 1; }
@keyframes flash { 0% { box-shadow: var(--glow-accent); } 100% { box-shadow: 0 0 0 0 transparent; } }
.attached { display: grid; gap: var(--space-3xs); padding: var(--space-xs) var(--space-sm); border: var(--rule-hair) solid var(--color-accent-line); border-radius: var(--radius-md); background: var(--color-accent-dim); }
.attached-label { font-size: var(--text-xs); color: var(--color-accent); }
.attached-parts { font-size: var(--text-sm); color: var(--color-ink); }

.topics { border: 0; margin: 0; padding: 0; min-width: 0; }
.topics legend, .field label { font-size: var(--text-sm); font-weight: 500; color: var(--color-ink); margin-bottom: var(--space-2xs); padding: 0; }
.chips { display: flex; flex-wrap: wrap; gap: var(--space-2xs); }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.chip span {
  display: inline-block; padding: var(--space-2xs) var(--space-xs); white-space: nowrap;
  border: var(--rule-hair) solid var(--color-rule-strong); border-radius: var(--radius-pill);
  font-size: var(--text-sm); color: var(--color-ink-2); cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.chip:hover span { border-color: var(--color-ink-3); color: var(--color-ink); }
.chip input:checked + span { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-on-accent); }
.chip input:focus-visible + span { outline: 2px solid var(--color-focus); outline-offset: 2px; }

.field-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-md); }
.field { display: grid; min-width: 0; }
.optional { font-weight: 400; color: var(--color-ink-3); margin-left: var(--space-3xs); }
.field input, .field textarea {
  width: 100%; padding: var(--space-xs) var(--space-sm);
  font: 400 var(--text-base)/1.5 var(--font-body); color: var(--color-ink);
  background: var(--color-paper); border: var(--rule-hair) solid var(--color-rule-strong); border-radius: var(--radius-md);
  transition: border-color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out);
}
.field textarea { resize: vertical; min-height: 8rem; }
.field input:hover, .field textarea:hover { border-color: var(--color-ink-3); }
.field input:focus-visible, .field textarea:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 0; border-color: var(--color-accent); }
.field [aria-invalid="true"] { border-color: var(--color-error); }
.field-error { margin-top: var(--space-2xs); font-size: var(--text-sm); color: var(--color-error); }
.form-foot { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-sm) var(--space-md); }
.form-status { font-size: var(--text-sm); color: var(--color-ink-2); }
.form-status[data-tone="success"] { color: var(--color-accent); }
.form-status[data-tone="error"] { color: var(--color-error); }

/* Stepped enquiry: one question at a time once JS is running */
.form-step { display: grid; gap: var(--space-md); min-width: 0; }
.form-progress { display: grid; gap: var(--space-2xs); }
.form-progress-label { font-size: var(--text-xs); color: var(--color-ink-3); }
.form-progress-label [data-progress-n] { color: var(--color-accent); }
.form-rail { height: 2px; border-radius: 2px; background: var(--color-rule); overflow: hidden; }
.form-rail i { display: block; height: 100%; width: 33.4%; background: var(--color-accent); transition: width var(--dur-slow) var(--ease-out); }
.form.is-stepped .form-step { display: none; }
.form.is-stepped .form-step.is-active { display: grid; gap: var(--space-md); animation: step-in var(--dur-slow) var(--ease-out) both; }
.form.is-stepped[data-dir="back"] .step.is-active { animation-name: step-back; }
@keyframes step-in { from { opacity: 0; transform: translateX(14px); } }
@keyframes step-back { from { opacity: 0; transform: translateX(-14px); } }
.form.is-stepped .form-step[data-step="2"] textarea { min-height: 10rem; }
.form-foot [data-submit] { margin-left: auto; }
.form-foot .form-status { flex-basis: 100%; }
.form-foot .form-status:empty { display: none; }
.form.is-done .form-foot, .form.is-done .form-progress, .form.is-done .attached { display: none; }

.form-step-done { justify-items: start; text-align: left; padding-block: var(--space-sm); }
.done-mark { width: 3rem; height: 3rem; fill: none; stroke: var(--color-accent); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.done-mark circle { stroke: var(--color-accent-line); stroke-dasharray: 132; stroke-dashoffset: 132; animation: draw 700ms var(--ease-out) forwards; }
.done-mark path { stroke-dasharray: 30; stroke-dashoffset: 30; animation: draw 420ms var(--ease-out) 420ms forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }
.done-text { color: var(--color-ink-2); max-width: 34rem; }
.done-text a { color: var(--color-accent); text-underline-offset: 3px; }

/* Enquiry sheet: the same form, opened over the page */
.sheet { width: min(36rem, calc(100% - 2 * var(--gutter))); max-height: min(44rem, calc(100dvh - 2rem)); padding: 0; border: 0; background: transparent; color: var(--color-ink); overflow: visible; }
.sheet::backdrop { background: oklch(8% 0.01 250 / 0.72); backdrop-filter: blur(6px); }
.sheet[open] { animation: sheet-in var(--dur-slow) var(--ease-out); }
.sheet[open]::backdrop { animation: fade-in var(--dur-slow) var(--ease-out); }
@keyframes sheet-in { from { opacity: 0; transform: translateY(16px) scale(0.98); } }
@keyframes fade-in { from { opacity: 0; } }
.sheet-slot .form { max-height: min(44rem, calc(100dvh - 2rem)); overflow-y: auto; overscroll-behavior: contain; box-shadow: var(--shadow-float); padding-top: calc(var(--space-lg) + 0.5rem); }
.sheet-close { position: absolute; z-index: 1; top: var(--space-xs); right: var(--space-xs); display: grid; place-items: center; width: 2.75rem; height: 2.75rem; border: 0; border-radius: 50%; background: transparent; color: var(--color-ink-2); cursor: pointer; transition: background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out); }
.sheet-close svg { width: 1.25rem; height: 1.25rem; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
.sheet-close:hover { background: var(--color-paper-3); color: var(--color-ink); }
.sheet-close:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; }
html:has(.sheet[open]) { overflow: hidden; }

/* ---------- footer (Ft1 mast-headed) ---------- */
.footer { padding: var(--space-2xl) 0 var(--space-xl); border-top: var(--rule-hair) solid var(--color-rule); }
.footer-lockup { display: flex; align-items: center; gap: clamp(0.75rem, 0.4rem + 2vw, 2rem); margin-bottom: var(--space-xl); min-width: 0; }
.mark-xl { width: clamp(3rem, 1rem + 9vw, 8.5rem); height: auto; aspect-ratio: 1; }
.mark-xl .mark-line, .mark-xl .mark-end { stroke: var(--color-rule-strong); }
.mark-xl .mark-end { fill: var(--color-paper); }
.footer-mast {
  font: 600 clamp(3rem, 1rem + 11vw, 10rem)/0.9 var(--font-display); letter-spacing: -0.045em;
  color: var(--color-paper-3); -webkit-text-stroke: 1px var(--color-rule-strong);
  overflow-wrap: anywhere; min-width: 0;
}
.footer-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.4fr); gap: var(--space-lg); font-size: var(--text-sm); color: var(--color-ink-2); }
.footer-grid a { color: var(--color-ink); text-underline-offset: 3px; white-space: nowrap; }
.placeholder { padding: 0 var(--space-3xs); border: var(--rule-hair) dashed var(--color-ink-3); border-radius: var(--radius-sm); }

/* ---------- responsive ---------- */
@media (max-width: 1180px) {
  .builder-body { grid-template-columns: minmax(0, 1fr); }
  .brief { position: static; grid-template-columns: minmax(0, 1fr) auto; align-items: center; }
  .brief > :not(.brief-cta) { grid-column: 1; }
  .brief-cta { grid-column: 2; grid-row: 1 / span 3; width: auto; }
}

@media (max-width: 1080px) {
  .services { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .rules-body { grid-template-columns: minmax(0, 1fr); }
  .rules-out { border-left: 0; border-top: var(--rule-hair) solid var(--color-rule); }
  .service:nth-child(3) { padding-left: 0; border-left: 0; }
  .service:nth-child(n+3) { border-top: var(--rule-hair) solid var(--color-rule); }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .hero-head, .sweep-intro, .enquire { grid-template-columns: minmax(0, 1fr); gap: var(--space-lg); }
  .hero-head { grid-template-areas: "copy" "film" "hint"; grid-template-rows: auto; }
  .hero-film { justify-self: stretch; max-width: none; }
  .player-stage { grid-template-columns: minmax(0, 1fr); gap: var(--space-md); padding: var(--space-md); }
  .player-story { min-height: 0; }
  .story-text { font-size: var(--text-base); }
  .clock { font-size: var(--text-2xl); }
  .chapter-name { display: none; }
  .transport { padding: var(--space-sm) var(--space-md); }
  .enquire-copy { position: static; }
  .bench-body { grid-template-columns: minmax(0, 1fr); }
  .viewer { border-right: 0; border-bottom: var(--rule-hair) solid var(--color-rule); padding: var(--space-sm); }
  .viewer[data-view="phone"] .viewer-canvas { height: min(36rem, 72vh); }
  .map { grid-template-columns: minmax(0, 1fr); gap: var(--space-lg); }
  .map-wires { display: none; }
  .map-col { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-2xs); padding-top: var(--space-md); }
  .node-core { grid-column: 1 / -1; }
  .map-col + .map-col::before {
    content: "↓"; position: absolute; top: calc(var(--space-lg) * -0.75); right: 0;
    font: 400 var(--text-sm)/1 var(--font-mono); color: var(--color-ink-3);
  }
  /* C4: the brief becomes a sticky bar while the map is on screen */
  .brief {
    position: sticky; bottom: var(--space-sm); top: auto; z-index: 5;
    grid-template-columns: minmax(0, 1fr) auto; gap: var(--space-2xs) var(--space-sm);
    padding: var(--space-xs) var(--space-xs) var(--space-xs) var(--space-sm);
    background: var(--color-nav-bg); -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  }
  .brief .brief-text { min-height: 0; font-size: var(--text-sm); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
  .brief .brief-meter, .brief .legend, .brief .brief-sweep { display: none; }
  .brief-head { gap: var(--space-sm); justify-content: flex-start; }
  .brief-cta { grid-row: 1 / span 2; min-height: 2.5rem; padding: 0 var(--space-sm); font-size: var(--text-sm); }
  .builder-body { gap: var(--space-lg); }
}

@media (max-width: 640px) {
  .nav { gap: var(--space-xs); }
  .nav-links { display: none; }
  .hero { padding-top: var(--space-xl); background-size: 32px 32px; }
  .presets-label { width: 100%; }
  .services, .steps, .field-row, .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .rules-pick { grid-template-columns: minmax(0, 1fr); }
  .rule-col + .rule-col { border-left: 0; border-top: var(--rule-hair) solid var(--color-rule); }
  .rules-head, .rules-out { padding-inline: var(--space-md); }
  .rule-sentence { font-size: var(--text-lg); }
  .rule-col { padding-block: var(--space-sm); }
  .rule-opts { display: flex; flex-wrap: wrap; }
  .rule-opt { padding: var(--space-2xs) var(--space-xs); border-radius: var(--radius-pill); }
  .rule-opt-name { font-size: var(--text-xs); }
  .rule-opt-meta { display: none; }
  .rules-cta .btn { flex: 1 1 100%; }
  .sheet { width: 100%; max-width: 100%; margin: auto 0 0; }
  .sheet[open] { animation-name: sheet-up; }
  .sheet-slot .form { border-radius: var(--radius-lg) var(--radius-lg) 0 0; border-bottom: 0; max-height: 88dvh; padding-bottom: calc(var(--space-lg) + env(safe-area-inset-bottom)); }
  .form-foot .btn { flex: 1 1 0; }
  .form-foot [data-submit] { margin-left: 0; }
  .service, .service + .service { padding: var(--space-md) 0; border-left: 0; }
  .service + .service { border-top: var(--rule-hair) solid var(--color-rule); }
  .spec-row { grid-template-columns: minmax(0, 1fr); gap: var(--space-3xs); }
  .player-head { padding: var(--space-sm) var(--space-md); }
  .form { padding: var(--space-md); }
}

@media (max-width: 420px) {
  .chapter-time { visibility: hidden; }
  .chapter[aria-current="step"] .chapter-time { visibility: visible; }
  .map-col { grid-template-columns: minmax(0, 1fr); }
  .node-core { grid-column: auto; }
  .player-stage { padding: var(--space-sm); }
  .player-end { padding: var(--space-sm); }
  .player-end .btn { flex: 1 1 100%; padding-inline: var(--space-sm); }
}

@keyframes sheet-up { from { transform: translateY(100%); } }
@media (prefers-reduced-motion: reduce) {
  .sheet[open], .sheet[open]::backdrop, .form.is-stepped .form-step.is-active { animation: none; }
  .done-mark circle, .done-mark path { animation: none; stroke-dashoffset: 0; }
  .rule-log li { animation: none; }
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 1ms !important; animation-iteration-count: 1 !important; transition-duration: 120ms !important; transition-delay: 0ms !important; }
  .map-wires path.is-on { stroke-dasharray: none; }
  .chapter.is-active .chapter-fill { transform: scaleX(1); }
  .viewer-canvas { transition: none; }
}