/* Ausgeology · The carbon cycle and Earth's spheres (Year 9 Science)
   The shared lesson design system: one reading column (about 68 characters)
   inside a 1080px frame; models, the globe and charts use the full frame.
   Sea blue is the accent; graphite carbon is the one dark highlight. Each
   sphere keeps one colour throughout: sky, sea, leaf and rock. */

:root {
  --bg: #eef0ec;
  --surface: #fbfcfa;
  --surface-2: #e2e7e2;
  --ink: #1a2124;
  --ink-2: #4a565a;
  --line: #c6cec9;
  --accent: #1f5f8b;
  --accent-ink: #ffffff;
  --accent-soft: #d6e5ef;
  --ochre: #b4501c;
  --ochre-band: #a5481a;
  --ochre-soft: #f6e2d4;
  --carbon: #1d2124;
  --carbon-ink: #ffffff;
  --sp-atm: #5b9fd0;
  --sp-atm-soft: #d9ebf7;
  --sp-hyd: #1f6f8a;
  --sp-hyd-soft: #d2e7ec;
  --sp-bio: #4f8a35;
  --sp-bio-soft: #dcecd2;
  --sp-geo: #9a5a2b;
  --sp-geo-soft: #efdcc9;
  --good: #2b7449;
  --good-soft: #dcefe3;
  --bad: #b3261e;
  --bad-soft: #f7dedc;
  --focus: #d99a00;
  --pop-bg: #1a2124;
  --pop-ink: #f2f4f2;
  --shadow: 0 1px 2px rgba(20, 30, 34, 0.06), 0 8px 24px rgba(20, 30, 34, 0.07);
  /* chart roles (validated with the dataviz palette script) */
  --viz-surface: #fbfcfa;
  --viz-1: #2a78d6;
  --viz-2: #eb6834;
  --viz-3: #1baf7a;
  --viz-dim: #b9b8ae;
  --viz-grid: #e1e0d9;
  --viz-axis: #c3c2b7;
  --viz-muted: #6f6e68;
  /* type */
  --font-display: "Archivo", "Helvetica Neue", Arial, system-ui, sans-serif;
  --font-body: "Atkinson Hyperlegible Next", "Atkinson Hyperlegible", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "Atkinson Hyperlegible Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --scale: 1;
  --radius: 12px;
  --steps: 10;
  --i-check: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M9.4 16.6 4.8 12l-1.6 1.6 6.2 6.2L21 8.2l-1.6-1.6z'/%3E%3C/svg%3E");
  --i-cross: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M18.4 4.2 12 10.6 5.6 4.2 4.2 5.6l6.4 6.4-6.4 6.4 1.4 1.4 6.4-6.4 6.4 6.4 1.4-1.4-6.4-6.4 6.4-6.4z'/%3E%3C/svg%3E");
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111517;
    --surface: #182024;
    --surface-2: #212a2f;
    --ink: #e6ebeb;
    --ink-2: #a9b5b8;
    --line: #2f3a3f;
    --accent: #7fb9e4;
    --accent-ink: #0b1822;
    --accent-soft: #1d3446;
    --ochre: #ec8a52;
    --ochre-band: #a5481a;
    --ochre-soft: #3d2416;
    --carbon: #0b0e10;
    --carbon-ink: #f2f4f2;
    --sp-atm: #7fb6dc;
    --sp-atm-soft: #1b3447;
    --sp-hyd: #5aa6bf;
    --sp-hyd-soft: #163640;
    --sp-bio: #7fb861;
    --sp-bio-soft: #1f3618;
    --sp-geo: #c98a55;
    --sp-geo-soft: #3d2816;
    --good: #66c792;
    --good-soft: #17372a;
    --bad: #f38b84;
    --bad-soft: #43201e;
    --focus: #ffcc4d;
    --pop-bg: #e6ebeb;
    --pop-ink: #111517;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.35);
    --viz-surface: #182024;
    --viz-1: #3987e5;
    --viz-2: #d95926;
    --viz-3: #199e70;
    --viz-dim: #5d6a6e;
    --viz-grid: #263034;
    --viz-axis: #3a464b;
    --viz-muted: #95a2a6;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #111517;
  --surface: #182024;
  --surface-2: #212a2f;
  --ink: #e6ebeb;
  --ink-2: #a9b5b8;
  --line: #2f3a3f;
  --accent: #7fb9e4;
  --accent-ink: #0b1822;
  --accent-soft: #1d3446;
  --ochre: #ec8a52;
  --ochre-band: #a5481a;
  --ochre-soft: #3d2416;
  --carbon: #0b0e10;
  --carbon-ink: #f2f4f2;
  --sp-atm: #7fb6dc;
  --sp-atm-soft: #1b3447;
  --sp-hyd: #5aa6bf;
  --sp-hyd-soft: #163640;
  --sp-bio: #7fb861;
  --sp-bio-soft: #1f3618;
  --sp-geo: #c98a55;
  --sp-geo-soft: #3d2816;
  --good: #66c792;
  --good-soft: #17372a;
  --bad: #f38b84;
  --bad-soft: #43201e;
  --focus: #ffcc4d;
  --pop-bg: #e6ebeb;
  --pop-ink: #111517;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.35);
  --viz-surface: #182024;
  --viz-1: #3987e5;
  --viz-2: #d95926;
  --viz-3: #199e70;
  --viz-dim: #5d6a6e;
  --viz-grid: #263034;
  --viz-axis: #3a464b;
  --viz-muted: #95a2a6;
  color-scheme: dark;
}

/* ---------- base ---------- */
html { font-size: calc(100% * var(--scale)); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
img, svg, canvas { max-width: 100%; }
a { color: var(--accent); text-underline-offset: 0.18em; }
button, input, select { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
p { margin: 0; }
.ul { text-decoration: underline; text-decoration-thickness: 0.09em; text-underline-offset: 0.16em; text-decoration-skip-ink: none; }

.wrap {
  max-width: 1080px;
  margin-inline: auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
.prose { max-width: 68ch; }
.prose > * + * { margin-top: 0.85em; }
.prose ul, .prose ol { padding-left: 1.3em; margin-bottom: 0; }
.prose li + li { margin-top: 0.4em; }
.small { font-size: 0.92rem; color: var(--ink-2); }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

.skip {
  position: absolute; left: 12px; top: -60px; z-index: 100;
  background: var(--accent); color: var(--accent-ink); padding: 10px 16px; border-radius: 8px;
  font-weight: 700; text-decoration: none;
}
.skip:focus { top: 12px; }

/* ---------- header ---------- */
.site-head { background: var(--surface); border-bottom: 1px solid var(--line); }
.head-row { display: flex; align-items: center; flex-wrap: wrap; gap: 10px 18px; padding-block: 12px 10px; }
.brand {
  font-family: var(--font-display); font-weight: 800; font-stretch: 118%;
  font-size: 1.2rem; letter-spacing: -0.01em; line-height: 1;
}
.brand i { font-style: normal; color: var(--ochre); }
.back {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 0.92rem; font-weight: 600; text-decoration: none; margin-right: auto;
}
.back:hover { text-decoration: underline; }
.back svg { width: 18px; height: 18px; }
.tools { display: flex; gap: 6px; flex-wrap: wrap; }
.tool {
  display: inline-flex; align-items: center; gap: 6px;
  min-height: 40px; padding: 6px 12px; border-radius: 999px;
  border: 1.5px solid var(--line); background: var(--bg); color: var(--ink);
  font-size: 0.9rem; font-weight: 600; cursor: pointer;
}
.tool:hover { border-color: var(--accent); }
.tool svg { width: 18px; height: 18px; flex: none; }
.tool[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.tool-val { font-family: var(--font-mono); font-size: 0.78rem; font-weight: 500; }

.rail-nav { padding-block: 2px 12px; }
.rail { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(var(--steps, 10), minmax(0, 1fr)); gap: 4px; }
.rail-btn {
  width: 100%; display: grid; gap: 5px; padding: 4px 0; border: 0; background: none;
  text-align: left; cursor: pointer; color: var(--ink-2); border-radius: 4px;
}
.rail-bar { height: 6px; border-radius: 3px; background: var(--surface-2); transition: background-color 0.2s; }
.rail-btn:hover .rail-bar { background: var(--line); }
.rail-btn.is-done .rail-bar { background: var(--accent-soft); box-shadow: inset 0 0 0 1px var(--accent); }
.rail-btn[aria-current="step"] .rail-bar { background: var(--accent); box-shadow: none; }
.rail-t { font-family: var(--font-mono); font-size: 0.7rem; line-height: 1.25; letter-spacing: 0.02em; }
.rail-t b { display: block; font-weight: 600; color: var(--ink); }
.rail-btn[aria-current="step"] .rail-t { color: var(--ink); }
.rail-now { display: none; font-family: var(--font-mono); font-size: 0.8rem; color: var(--ink-2); margin-top: 6px; }
.rail-now b { color: var(--ink); font-weight: 600; }

/* ---------- screens ---------- */
.js .screen:not(.is-active) { display: none; }
.screen { padding-block: 36px 56px; }
.screen-inner { display: grid; gap: 28px; }
.screen-inner > *, .section > *, .hero > *, .checks > *, .lab-body > * { min-width: 0; }
.screen-head { display: grid; gap: 8px; }
.eyebrow {
  font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.09em;
  text-transform: uppercase; color: var(--ink-2);
}
.display {
  font-family: var(--font-display); font-weight: 800; font-stretch: 116%;
  letter-spacing: -0.015em; line-height: 1; margin: 0; text-wrap: balance;
}
h1.display { font-size: clamp(2.7rem, 1.3rem + 5.6vw, 5.4rem); line-height: 0.95; }
h2.display { font-size: clamp(2rem, 1.25rem + 2.8vw, 3.1rem); }
h2.display:focus, h1.display:focus { outline: none; }
h3 {
  font-family: var(--font-display); font-weight: 750; font-stretch: 108%;
  font-size: 1.32rem; line-height: 1.2; margin: 0; text-wrap: balance; letter-spacing: -0.005em;
}
.display .dot { color: var(--ochre); }
.lede { font-size: 1.28rem; line-height: 1.5; max-width: 60ch; }
.section { display: grid; gap: 14px; }

/* ---------- hero ---------- */
.hero { display: grid; gap: 20px; padding-bottom: 8px; }
.fig-tag {
  position: absolute; right: 8px; top: 8px; font-family: var(--font-mono); font-size: 0.66rem;
  letter-spacing: 0.06em; text-transform: uppercase; background: rgba(0, 0, 0, 0.45); color: #fff;
  padding: 2px 6px; border-radius: 4px;
}
.country {
  max-width: 76ch; background: var(--surface-2); border-radius: var(--radius);
  padding: 16px 18px; font-size: 1rem; display: grid; gap: 6px;
}
.country b { font-weight: 700; }

.goals { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; align-items: start; }
.goal-card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; display: grid; gap: 10px; align-content: start; }
.goal-card ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.goal-card li { display: grid; grid-template-columns: 26px minmax(0, 1fr); gap: 8px; align-items: start; line-height: 1.45; }
.sc-num {
  width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center;
  font-family: var(--font-mono); font-size: 0.75rem; font-weight: 600;
  border: 1.5px solid var(--accent); color: var(--accent); margin-top: 1px;
}
.label {
  font-family: var(--font-mono); font-size: 0.74rem; font-weight: 600; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--ink-2);
}

/* ---------- teaching blocks ---------- */
.key-idea {
  max-width: 68ch; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px 20px 18px; display: grid; gap: 6px;
}
.key-idea .label { display: inline-flex; align-items: center; gap: 8px; }
.key-idea .label::before { content: ""; width: 14px; height: 14px; border-radius: 3px; background: var(--accent); }
.key-idea p { font-size: 1.26rem; font-weight: 700; line-height: 1.4; }

.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; max-width: 72ch; counter-reset: step; }
.steps > li { display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 12px; align-items: start; counter-increment: step; }
.steps > li::before {
  content: counter(step); width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center;
  background: var(--ochre-band); color: #fff; font-family: var(--font-mono); font-weight: 600; font-size: 0.85rem; margin-top: 1px;
}
.table-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
table { border-collapse: collapse; width: 100%; font-size: 1rem; line-height: 1.45; }
caption { text-align: left; padding: 12px 14px 0; font-weight: 700; }
th, td { text-align: left; vertical-align: top; padding: 10px 14px; border-bottom: 1px solid var(--line); }
thead th {
  font-family: var(--font-mono); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--ink-2); background: var(--surface-2);
}
tbody tr:last-child > * { border-bottom: 0; }
tbody th { font-weight: 700; }
td.time, th.time { font-variant-numeric: tabular-nums; }

details.more { max-width: 72ch; border: 1px dashed var(--line); border-radius: var(--radius); padding: 0 18px; background: transparent; }
details.more > summary { cursor: pointer; padding: 14px 0; font-weight: 700; list-style: none; display: flex; align-items: center; gap: 10px; }
details.more > summary::-webkit-details-marker { display: none; }
details.more > summary::before {
  content: "+"; width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; flex: none;
  border: 1.5px solid var(--accent); color: var(--accent); font-family: var(--font-mono); font-size: 0.95rem; line-height: 1;
}
details.more[open] > summary::before { content: "\2212"; }
details.more > .more-body { padding: 0 0 18px; display: grid; gap: 12px; }
details.reveal > summary { list-style: none; width: fit-content; }
details.reveal > summary::-webkit-details-marker { display: none; }
details.reveal[open] > summary { display: none; }
.tag-ext { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); font-weight: 500; }

/* ---------- labs ---------- */
.lab { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; overflow: hidden; box-shadow: var(--shadow); }
.lab-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 4px 16px; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.lab-head h3 { font-size: 1.15rem; }
.lab-head .label { color: var(--accent); }
.lab-body { padding: 16px 18px 18px; display: grid; gap: 14px; }
.lab-body > p.small { max-width: 72ch; }
.lab canvas { display: block; width: 100%; border-radius: 10px; background: #2a1810; }
.lab .canvas-light { background: #cfe3ec; }
.lab-controls { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.status {
  margin: 0; min-height: 3.3em; padding: 12px 14px; border-radius: 10px;
  background: var(--surface-2); font-size: 1rem; line-height: 1.5;
}
.model-note { font-size: 0.92rem; color: var(--ink-2); max-width: 75ch; }
.model-note b { color: var(--ink); }

.btn {
  display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 9px 16px;
  border-radius: 999px; border: 1.5px solid var(--line); background: var(--surface); color: var(--ink);
  font-size: 1rem; font-weight: 650; line-height: 1.2; cursor: pointer; text-align: left; text-decoration: none;
}
.btn:hover:not(:disabled) { border-color: var(--accent); }
.btn[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn-primary:hover:not(:disabled) { filter: brightness(1.08); }
.btn svg { width: 18px; height: 18px; flex: none; }
.btn small { font-weight: 500; font-size: 0.82rem; opacity: 0.85; }

.slider-row { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 12px; align-items: center; }
.slider-row .label { white-space: nowrap; }
input[type="range"] { width: 100%; accent-color: var(--ochre); height: 32px; cursor: pointer; }
.stage-name { font-family: var(--font-display); font-weight: 800; font-stretch: 112%; font-size: 1.3rem; }

/* ---------- checks for understanding ---------- */
.checks { display: grid; gap: 16px; }
.check {
  max-width: 780px; background: var(--surface); border: 1px solid var(--line); border-radius: 16px;
  padding: 18px 20px 20px; display: grid; gap: 12px;
}
.check-head { display: flex; justify-content: space-between; gap: 12px; }
.check-q { font-weight: 700; font-size: 1.12rem; line-height: 1.45; }
.check-opts { display: grid; gap: 8px; }
.opt {
  position: relative; display: block; width: 100%; text-align: left; cursor: pointer;
  padding: 12px 14px 12px 48px; border-radius: 12px; border: 1.5px solid var(--line);
  background: var(--bg); color: var(--ink); line-height: 1.45; font-size: 1.02rem;
}
.opt:hover:not(:disabled) { border-color: var(--accent); }
.opt::before {
  content: attr(data-letter); position: absolute; left: 13px; top: 11px; width: 24px; height: 24px;
  border-radius: 50%; border: 1.5px solid var(--ink-2); color: var(--ink-2);
  font-family: var(--font-mono); font-size: 0.78rem; font-weight: 600; line-height: 21px; text-align: center;
}
.opt.is-right { border-color: var(--good); background: var(--good-soft); }
.opt.is-wrong { border-color: var(--bad); background: var(--bad-soft); }
.opt.is-right::before, .opt.is-wrong::before { content: ""; border: 0; border-radius: 0; }
.opt.is-right::before { background: var(--good); -webkit-mask: var(--i-check) center / 22px no-repeat; mask: var(--i-check) center / 22px no-repeat; }
.opt.is-wrong::before { background: var(--bad); -webkit-mask: var(--i-cross) center / 20px no-repeat; mask: var(--i-cross) center / 20px no-repeat; }
.opt:disabled { cursor: default; }
.opt:disabled:not(.is-right):not(.is-wrong) { opacity: 0.6; }
.fb { padding: 12px 14px; border-radius: 10px; font-size: 1rem; line-height: 1.5; background: var(--surface-2); }
.fb.is-right { background: var(--good-soft); }
.fb.is-wrong { background: var(--bad-soft); }
.fb strong { font-weight: 800; }
.fb.is-right strong { color: var(--good); }
.fb.is-wrong strong { color: var(--bad); }

/* ---------- exit check and results ---------- */
.results { max-width: 820px; background: var(--surface); border: 1.5px solid var(--accent); border-radius: 16px; padding: 18px 20px; display: grid; gap: 12px; }
.results-score { font-family: var(--font-display); font-weight: 800; font-stretch: 112%; font-size: 2rem; line-height: 1.1; }
.sc-results { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.sc-results li { display: grid; grid-template-columns: 28px minmax(0, 1fr); gap: 10px; align-items: start; line-height: 1.45; }
.sc-icon { width: 24px; height: 24px; border-radius: 50%; margin-top: 1px; }
.sc-icon.ok { background: var(--good); -webkit-mask: var(--i-check) center / 20px no-repeat; mask: var(--i-check) center / 20px no-repeat; }
.sc-icon.todo { border: 2px solid var(--line); }
.sc-review { font-size: 0.95rem; }
.offline { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 16px; align-items: center; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 18px 20px; }
.offline-links { display: flex; flex-wrap: wrap; gap: 8px; }
.teacher { max-width: 80ch; }
.teacher .more-body h3 { font-size: 1.05rem; margin-top: 6px; }
.teacher blockquote { margin: 0; padding: 10px 14px; border-radius: 10px; background: var(--surface-2); font-style: italic; }
.teacher ul { margin: 0; padding-left: 1.2em; display: grid; gap: 6px; }
.confirm-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }

/* ---------- screen navigation ---------- */
.screen-nav { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; padding-top: 22px; border-top: 1px solid var(--line); }
.screen-nav .next { margin-left: auto; }
.screen-nav .btn { max-width: 100%; }

/* ---------- glossary ---------- */
.term { cursor: help; border-bottom: 2px dotted var(--accent); border-radius: 2px; }
.term:focus-visible { outline: 3px solid var(--focus); outline-offset: 1px; }
.term:hover, .term[aria-expanded="true"] { color: var(--accent); }
.term-pop {
  position: absolute; z-index: 60; width: max-content; max-width: min(340px, calc(100vw - 32px));
  background: var(--pop-bg); color: var(--pop-ink); border-radius: 12px; padding: 12px 14px 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25); font-size: 0.98rem; line-height: 1.45; display: grid; gap: 4px;
}
.term-pop b { font-size: 1.02rem; }
.term-pop button { justify-self: start; margin-top: 4px; background: none; border: 0; padding: 4px 0; color: inherit; text-decoration: underline; cursor: pointer; font-size: 0.9rem; }
dialog.glossary {
  border: 0; border-radius: 18px; padding: 0; width: min(680px, calc(100vw - 32px)); max-height: min(84vh, 760px);
  background: var(--surface); color: var(--ink); box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}
dialog.glossary::backdrop { background: rgba(10, 14, 16, 0.55); }
.gl-head { position: sticky; top: 0; display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 16px 20px; background: var(--surface); border-bottom: 1px solid var(--line); }
.gl-head h2 { font-family: var(--font-display); font-weight: 800; font-stretch: 112%; font-size: 1.5rem; margin: 0; }
.gl-list { margin: 0; padding: 12px 20px 20px; display: grid; gap: 12px; }
.gl-list dt { font-weight: 800; }
.gl-list dd { margin: 2px 0 0; color: var(--ink-2); line-height: 1.5; }

/* read aloud */
.is-reading { background: var(--accent-soft); box-shadow: 0 0 0 4px var(--accent-soft); border-radius: 4px; }

.site-foot { border-top: 1px solid var(--line); background: var(--surface); }
.site-foot .wrap { padding-block: 18px 24px; display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; font-size: 0.9rem; color: var(--ink-2); }

/* ---------- responsive ---------- */
@media (max-width: 760px) {
  .goals { grid-template-columns: minmax(0, 1fr); }
  .rail-t { display: none; }
  .rail-now { display: block; }
  .offline { grid-template-columns: minmax(0, 1fr); }
  .tool-label { display: none; }
  .tool { padding: 6px 10px; }
}
@media (max-width: 520px) {
  body { font-size: 1.0625rem; }
  .screen { padding-block: 26px 44px; }
  .lab-head, .lab-body { padding-left: 14px; padding-right: 14px; }
  .check { padding: 16px; }
  .slider-row { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .slider-row input { grid-column: 1 / -1; grid-row: 1; }
  .slider-row .hi { text-align: right; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}

/* ---------- Global systems (Year 10): lesson tokens and shared blocks ----------
   Deep teal is the accent; heat red is the one warm highlight, used for energy
   and temperature. The four spheres keep the colours they had in the carbon
   lesson. Charts use the validated dataviz palette from base.css. */
:root {
  --accent: #13698a;
  --accent-ink: #ffffff;
  --accent-soft: #d6e8ef;
  --heat: #c9472b;
  --heat-soft: #f8e1da;
  --cold: #2a78d6;
  --cold-soft: #dbe8f8;
  --space: #0d1b2a;
  --sun: #f2b63c;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --accent: #73bfdc; --accent-ink: #07202b; --accent-soft: #163643; --heat: #f08a6e; --heat-soft: #43241c; --cold: #5aa0ea; --cold-soft: #1b3450; --space: #05090f; --sun: #f5c45c; }
}
:root[data-theme="dark"] { --accent: #73bfdc; --accent-ink: #07202b; --accent-soft: #163643; --heat: #f08a6e; --heat-soft: #43241c; --cold: #5aa0ea; --cold-soft: #1b3450; --space: #05090f; --sun: #f5c45c; }

/* the hero */
.hero-fig { position: relative; margin: 0; border-radius: 18px; overflow: hidden; background: var(--space); box-shadow: var(--shadow); }
.hero-fig svg { display: block; width: 100%; height: auto; }
.hero-fig figcaption { padding: 12px 16px; background: var(--surface); border-top: 1px solid var(--line); font-size: 0.95rem; color: var(--ink-2); }
.question { max-width: 76ch; background: var(--surface); border: 1.5px solid var(--accent); border-radius: 16px; padding: 18px 22px; display: grid; gap: 6px; }
.question p { font-family: var(--font-display); font-weight: 800; font-stretch: 110%; font-size: 1.5rem; line-height: 1.2; letter-spacing: -0.01em; }
.question .small { font-family: var(--font-body); }

.spheres { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); max-width: 820px; border-radius: 12px; overflow: hidden; }
.sphere { color: #fff; padding: 18px 14px 12px; display: grid; gap: 1px; align-content: end; min-height: 80px; }
.sphere b { font-family: var(--font-display); font-weight: 800; font-stretch: 112%; font-size: 1.05rem; line-height: 1.15; }
.sphere span { font-size: 0.86rem; line-height: 1.3; opacity: 0.95; }
.sphere.sp-atm { background: #5b9fd0; } .sphere.sp-hyd { background: #1f6f8a; } .sphere.sp-bio { background: #4f8a35; } .sphere.sp-geo { background: #9a5a2b; }

/* ADI phase chip */
.phase { display: inline-flex; align-items: center; gap: 8px; width: fit-content; padding: 4px 12px 4px 6px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line); font-size: 0.88rem; font-weight: 700; }
.phase i { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; font-style: normal; font-family: var(--font-mono); font-size: 0.76rem; font-weight: 700; color: #fff; background: var(--accent); }
.phase.p-model i { background: #13698a; } .phase.p-evidence i { background: #2b7449; } .phase.p-argue i { background: #9a3d6b; } .phase.p-predict i { background: #6c4fa8; } .phase.p-report i { background: #c6711f; }

/* notebook */
.note { display: grid; gap: 6px; max-width: 72ch; }
.note label, .note .field-label { font-weight: 700; line-height: 1.4; }
.note .hint { font-size: 0.92rem; color: var(--ink-2); font-weight: 400; }
.note textarea, .note input[type="text"] { width: 100%; border: 1.5px solid var(--line); border-radius: 10px; padding: 10px 12px; font: inherit; font-size: 1.02rem; color: var(--ink); background-color: var(--surface); }
.note textarea { min-height: 7.6em; resize: vertical; line-height: 1.9rem; padding-top: 6px; background-image: repeating-linear-gradient(180deg, transparent 0 calc(1.9rem - 1px), var(--line) calc(1.9rem - 1px) 1.9rem); background-attachment: local; background-position: 0 6px; }
.note textarea:focus, .note input[type="text"]:focus { border-color: var(--accent); outline: 2px solid var(--accent-soft); outline-offset: 0; }
.notebook { display: grid; gap: 16px; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 18px 20px 20px; max-width: 820px; }
.notebook > h3 { display: flex; align-items: center; gap: 10px; }
.notebook > h3::before { content: ""; width: 20px; height: 22px; flex: none; border-radius: 3px 5px 5px 3px; background: var(--accent); box-shadow: inset 4px 0 0 rgba(255, 255, 255, 0.28); }
fieldset.note { border: 0; margin: 0; padding: 0; min-width: 0; }
fieldset.note legend { padding: 0; margin-bottom: 6px; }
.choice-row { display: grid; gap: 8px; }
.choice-row label { display: flex; gap: 10px; align-items: flex-start; padding: 10px 12px; border: 1.5px solid var(--line); border-radius: 12px; background: var(--bg); cursor: pointer; line-height: 1.4; font-weight: 500; }
.choice-row label:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.choice-row input { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--accent); flex: none; }
.selfcheck { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.selfcheck label { display: flex; gap: 10px; align-items: flex-start; line-height: 1.4; cursor: pointer; font-weight: 500; }
.selfcheck input { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--good); flex: none; }
.readback { margin: 0; padding: 10px 14px; border-radius: 10px; background: var(--accent-soft); font-size: 0.98rem; line-height: 1.45; max-width: 72ch; }
.readback:empty { display: none; }
.key-idea p.label { font-size: 0.74rem; font-weight: 600; line-height: 1.3; }
.sentence-starters { font-size: 0.92rem; color: var(--ink-2); }

/* evidence cards, collected as the student works */
.ev-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.ev-card { display: grid; grid-template-columns: 28px minmax(0, 1fr); gap: 10px; align-items: start; padding: 10px 12px; border: 1.5px solid var(--line); border-radius: 12px; background: var(--bg); line-height: 1.4; }
.ev-card input { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--accent); }
.ev-card.is-picked { border-color: var(--accent); background: var(--accent-soft); }
.ev-card .ev-src { display: block; font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.04em; color: var(--ink-2); margin-top: 3px; }
.ev-card.is-locked { opacity: 0.55; }
.country-card { max-width: 76ch; display: grid; gap: 12px; background: var(--surface); border: 1px solid var(--line); border-left: 6px solid var(--ochre-band); border-radius: 6px 16px 16px 6px; padding: 18px 20px; }
.facts { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; max-width: 76ch; }
.facts li { display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: 12px; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.facts li:last-child { border-bottom: 0; }
.facts b { font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--ink-2); font-weight: 600; padding-top: 3px; }

/* charts (dataviz specs: thin marks, hairline grid, text in ink tokens) */
.rain-key { display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: 0.92rem; color: var(--ink-2); }
.rain-key span { display: inline-flex; align-items: center; gap: 8px; }
.rain-key i { display: inline-block; width: 18px; height: 3px; border-radius: 2px; }
.rain-key i.s1 { background: var(--viz-1); } .rain-key i.s2 { background: var(--viz-2); } .rain-key i.s3 { background: var(--viz-3); }
.rain-key i.bar { height: 10px; background: linear-gradient(90deg, var(--cold) 50%, var(--heat) 50%); }
.rain-key i.dim { background: var(--viz-dim); }
.rain-plot { position: relative; background: var(--viz-surface); border-radius: 10px; }
.tc-svg { display: block; max-width: none; overflow: visible; }
.tc-svg:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 8px; }
.rc-grid { stroke: var(--viz-grid); stroke-width: 1; }
.rc-axis { stroke: var(--viz-axis); stroke-width: 1; }
.rc-zero { stroke: var(--viz-muted); stroke-width: 1; }
.rc-tick, .rc-month { font-family: var(--font-mono); font-size: 12px; fill: var(--viz-muted); font-variant-numeric: tabular-nums; }
.rc-title { font-family: var(--font-body); font-weight: 700; font-size: 13px; fill: var(--ink); }
.rc-value { font-family: var(--font-body); font-weight: 700; font-size: 13px; fill: var(--ink); }
.tc-bar.warm { fill: var(--heat); } .tc-bar.cool { fill: var(--cold); }
.tc-line { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.tc-line.s1 { stroke: var(--viz-1); } .tc-line.s2 { stroke: var(--viz-2); } .tc-line.s3 { stroke: var(--viz-3); } .tc-line.ink { stroke: var(--ink); }
.tc-line.smooth { stroke-width: 3; }
.tc-cursor { stroke: var(--ink); stroke-width: 1; opacity: 0.45; }
.tc-mark { fill: var(--viz-dim); }
.tc-mark-label { font-family: var(--font-mono); font-size: 11px; fill: var(--viz-muted); }
.tc-end { stroke: var(--viz-surface); stroke-width: 2; }
.tc-end.s1 { fill: var(--viz-1); } .tc-end.s2 { fill: var(--viz-2); } .tc-end.s3 { fill: var(--viz-3); }
.rc-hit { fill: transparent; cursor: crosshair; }
.rc-tip { position: absolute; z-index: 5; pointer-events: none; display: grid; gap: 1px; min-width: 120px; max-width: 260px; padding: 8px 10px; border-radius: 8px; background: var(--pop-bg); color: var(--pop-ink); font-size: 0.86rem; line-height: 1.35; box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25); }
.rc-tip b { font-size: 1.05rem; font-variant-numeric: tabular-nums; }
.tip-row { padding-left: 20px; position: relative; font-variant-numeric: tabular-nums; }
.tip-row::before { content: ""; position: absolute; left: 0; top: 0.55em; width: 14px; height: 3px; border-radius: 2px; background: var(--viz-1); }
.tip-row.s2::before { background: var(--viz-2); } .tip-row.s3::before { background: var(--viz-3); } .tip-row.bar::before { background: var(--heat); }
.rain-src { font-size: 0.86rem; color: var(--ink-2); }
.rain-table td.num { text-align: right; font-variant-numeric: tabular-nums; }

/* ---------- Global systems labs ---------- */
.stage { position: relative; border-radius: 12px; overflow: hidden; background: var(--space); }
.stage svg { display: block; width: 100%; height: auto; }
.bl-hint { min-height: 1.5em; font-weight: 600; color: var(--ink); }
.dials { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.dial { display: grid; gap: 4px; background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px 8px; }
.dial .label { display: flex; justify-content: space-between; align-items: baseline; }
.dial .label b { font-family: var(--font-mono); font-size: 0.9rem; color: var(--ink); text-transform: none; letter-spacing: 0; }
.dial input[type="range"] { height: 34px; margin: 0; }
.dial .small { font-size: 0.84rem; }
.en-temp { font-family: var(--font-display); font-weight: 800; font-stretch: 112%; font-size: 1.6rem; line-height: 1.1; }
.en-temp .small { font-family: var(--font-body); font-weight: 500; font-size: 0.92rem; }
.readouts { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 6px 18px; align-items: center; }

/* energy diagram */
.g-space { stop-color: #0d1b2a; } .g-sky-top { stop-color: #2a5a84; } .g-sky-low { stop-color: #8fc3e8; }
.en-space { fill: #0d1b2a; } .en-star { fill: #fff; opacity: 0.7; }
.en-zone { font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.14em; fill: #fff; opacity: 0.75; }
.en-edge { stroke: #fff; stroke-width: 1; opacity: 0.25; stroke-dasharray: 4 6; }
.en-sun { fill: #f6c445; } .en-sun-glow { fill: #f6c445; opacity: 0.22; }
.en-cloud ellipse { fill: #fff; opacity: 0.85; }
.en-ocean { fill: #1f5f8b; } .en-land { fill: #6b8f4b; } .en-wave { fill: none; stroke: #fff; stroke-width: 2; opacity: 0.35; }
.en-heat { fill: #ff6a3d; }
.en-surface-label { font-family: var(--font-body); font-weight: 700; font-size: 16px; fill: #fff; opacity: 0.85; }
.en-unit { font-family: var(--font-mono); font-size: 12px; fill: #fff; opacity: 0.7; }
.en-arrow line { fill: none; stroke-linecap: butt; transition: stroke-width 0.3s; }
.en-sw line { stroke: #f6c445; } .en-lw line { stroke: #ff7a52; } .en-nr line { stroke: #c8e6f5; }
.en-sw .en-head { fill: #f6c445; } .en-lw .en-head { fill: #ff7a52; } .en-nr .en-head { fill: #c8e6f5; }
.en-val { font-family: var(--font-mono); font-weight: 700; font-size: 16px; fill: #fff; paint-order: stroke; stroke: rgba(0, 0, 0, 0.45); stroke-width: 3px; }
.en-name { font-family: var(--font-body); font-size: 12px; fill: #fff; opacity: 0.9; paint-order: stroke; stroke: rgba(0, 0, 0, 0.45); stroke-width: 3px; }
.en-arrow.is-dim { opacity: 0.3; } .en-arrow.is-hi line, .en-arrow.is-hi .en-head { filter: drop-shadow(0 0 6px #fff); }
.en-chev path { fill: none; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.en-sw .en-chev path { stroke: #4a3200; opacity: 0.55; } .en-lw .en-chev path { stroke: #fff; opacity: 0.85; } .en-nr .en-chev path { stroke: #1b4d7a; opacity: 0.7; }
.en-dir text { font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.08em; fill: #fff; }
.en-dir .dim { fill-opacity: 0.75; } .en-dir .tot { font-weight: 700; font-size: 15px; letter-spacing: 0; fill-opacity: 1; }
.en-dir-icon, .en-brace { fill: none; stroke: #fff; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; opacity: 0.8; }
.en-key text { font-family: var(--font-body); font-size: 13px; fill: #fff; opacity: 0.9; }
.en-key .en-unit { opacity: 0.8; }
.en-key-sw { fill: #f6c445; } .en-key-lw { fill: #ff7a52; } .en-key-nr { fill: #c8e6f5; }
.en-imb rect { fill: #1a2124; opacity: 0.8; } .en-imb text { font-family: var(--font-body); font-weight: 700; font-size: 15px; fill: #fff; }
.en-imb.is-warming rect { fill: #9a2f1c; } .en-imb.is-cooling rect { fill: #1b4d7a; }
.sphere-btns { display: flex; flex-wrap: wrap; gap: 8px; }
.sphere-btn { min-height: 44px; padding: 8px 14px; border-radius: 999px; border: 2px solid; background: var(--surface); color: var(--ink); font-weight: 700; cursor: pointer; }
.sphere-btn.sp-atm { border-color: #5b9fd0; } .sphere-btn.sp-hyd { border-color: #1f6f8a; } .sphere-btn.sp-bio { border-color: #4f8a35; } .sphere-btn.sp-geo { border-color: #9a5a2b; }
.sphere-btn[aria-pressed="true"].sp-atm { background: #5b9fd0; color: #fff; } .sphere-btn[aria-pressed="true"].sp-hyd { background: #1f6f8a; color: #fff; }
.sphere-btn[aria-pressed="true"].sp-bio { background: #4f8a35; color: #fff; } .sphere-btn[aria-pressed="true"].sp-geo { background: #9a5a2b; color: #fff; }

/* suspects */
.su-tabs { display: flex; flex-wrap: wrap; gap: 8px; }
.su-stack { display: grid; gap: 10px; }
.su-caption { font-size: 0.92rem; color: var(--ink-2); max-width: 76ch; }

/* card sorts */
.pr-deck { display: flex; flex-wrap: wrap; gap: 8px; min-height: 60px; padding: 10px; border: 1.5px dashed var(--line); border-radius: 12px; }
.pr-card { display: grid; gap: 2px; max-width: 360px; text-align: left; padding: 10px 12px; border-radius: 12px; border: 1.5px solid var(--line); background: var(--surface); color: var(--ink); font-size: 0.96rem; line-height: 1.4; cursor: pointer; }
.pr-card .ev-src { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.04em; color: var(--ink-2); }
.pr-card.is-selected { border-color: var(--sun); background: var(--sun); color: #1a2124; } .pr-card.is-selected .ev-src { color: #1a2124; }
.pr-card.is-right { border-color: var(--good); background: var(--good-soft); } .pr-card.is-wrong { border-color: var(--bad); background: var(--bad-soft); }
.pr-bins { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.pr-bin { display: grid; gap: 8px; align-content: start; padding: 10px; border-radius: 14px; background: var(--bg); border: 1.5px solid var(--line); }
.pr-bin.is-target { border-color: var(--sun); }
.pr-bin-btn { display: grid; gap: 2px; text-align: left; padding: 10px 12px; border-radius: 10px; border: 1.5px solid var(--accent); background: var(--surface); color: var(--ink); cursor: pointer; }
.pr-bin-btn:disabled { opacity: 0.7; cursor: default; }
.pr-bin-btn b { font-size: 1rem; } .pr-bin-btn span { font-size: 0.84rem; color: var(--ink-2); }
.pr-list { display: grid; gap: 6px; }

/* ocean */
.oc-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; align-items: start; }
.g-oc-top { stop-color: #4f9bd6; } .g-oc-deep { stop-color: #0d2b45; }
.oc-glass { fill: none; stroke: var(--ink-2); stroke-width: 3; stroke-linejoin: round; }
.oc-grid { stroke: #fff; stroke-width: 1; opacity: 0.35; stroke-dasharray: 4 6; }
.oc-label { font-family: var(--font-mono); font-size: 12px; fill: #fff; opacity: 0.9; }
.oc-parcel circle { fill: #f6c445; stroke: #fff; stroke-width: 3; transition: none; }
.oc-parcel { transition: transform 1.2s cubic-bezier(0.4, 0, 0.6, 1); }
.oc-parcel text { font-family: var(--font-mono); font-size: 13px; font-weight: 700; fill: #1a2124; }
.oc-parcel.is-sinking circle { fill: #c8e6f5; } .oc-parcel.is-floating circle { fill: #ff9a6a; }
.oc-trail { fill: none; }
.oc-sea { fill: #1f5f8b; } .oc-land path { fill: #cbb68a; stroke: #9a8560; stroke-width: 0.8; } .oc-antarctica { fill: #e8eef2; }
.oc-flow { fill: none; stroke-width: 5; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 12 10; animation: oc-run 2.4s linear infinite; }
.oc-cold { stroke: #8fd0ff; } .oc-warm { stroke: #ff7a52; } .oc-bottom { stroke: #e0f4ff; stroke-width: 4; }
.oc-head-cold { fill: #8fd0ff; } .oc-head-warm { fill: #ff7a52; }
@keyframes oc-run { to { stroke-dashoffset: -44; } }
.oc-site { cursor: pointer; } .oc-site circle { fill: #e0f4ff; opacity: 0.5; } .oc-site .oc-site-dot { fill: #fff; opacity: 1; }
.oc-site:hover circle, .oc-site:focus-visible circle { opacity: 0.9; }
.oc-map-label { font-family: var(--font-mono); font-size: 13px; fill: #fff; letter-spacing: 0.06em; paint-order: stroke; stroke: rgba(0, 0, 0, 0.5); stroke-width: 3px; }
.oc-map-label-dark { fill: #1a2124; stroke: none; }
.oc-key { display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: 0.92rem; color: var(--ink-2); }
.oc-key span { display: inline-flex; align-items: center; gap: 8px; }
.oc-key i { display: inline-block; width: 22px; height: 4px; border-radius: 2px; }
.oc-key i.warm { background: #ff7a52; } .oc-key i.cold { background: #8fd0ff; } .oc-key i.site { width: 12px; height: 12px; border-radius: 50%; background: #e0f4ff; border: 2px solid #1f5f8b; }

/* future */
.fu-row { cursor: pointer; }
.fu-hit { fill: transparent; }
.fu-row.is-active .fu-hit { fill: var(--accent-soft); opacity: 0.7; }
.fu-range { stroke: var(--viz-1); stroke-width: 3; stroke-linecap: round; }
.fu-dot { fill: var(--viz-1); stroke: var(--viz-surface); stroke-width: 2; }
.fu-row.is-active .fu-dot { fill: var(--heat); } .fu-row.is-active .fu-range { stroke: var(--heat); }

/* argument builder */
.ar-steps { display: grid; gap: 18px; }
.ar-step { display: grid; gap: 10px; padding: 14px 16px; border-radius: 14px; background: var(--bg); border: 1px solid var(--line); }
.ar-step h4 { margin: 0; font-family: var(--font-display); font-weight: 800; font-stretch: 110%; font-size: 1.1rem; display: flex; align-items: center; gap: 10px; }
.ar-step h4 i { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; font-style: normal; font-family: var(--font-mono); font-size: 0.78rem; font-weight: 700; color: #fff; background: #9a3d6b; }
.critic { display: grid; gap: 14px; }
.critic .check { border-left: 6px solid #9a3d6b; }
.critic .check-q::before { content: "The critic says: "; font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); display: block; margin-bottom: 4px; }

/* responsive */
@media (max-width: 860px) { .oc-layout { grid-template-columns: minmax(0, 1fr); } .dials { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 640px) { .pr-bins { grid-template-columns: minmax(0, 1fr); } .readouts { grid-template-columns: minmax(0, 1fr); } .pr-card { max-width: none; } }
@media (max-width: 600px) { .stage.en-stage { overflow-x: auto; -webkit-overflow-scrolling: touch; } .stage.en-stage svg { min-width: 760px; } }
@media print { .site-head, .screen-nav, .tools, .btn, .rail-nav, .site-foot { display: none !important; } .screen { display: block !important; page-break-after: always; } }