/* Vistas didácticas: original lab layout re-themed with FAI kit tokens. Canvases stay light 'lab plates' (drawn by app.js, unchanged). */
:root {
  --paper: var(--fai-bg);
  --ink: var(--fai-ink);
  --blue: var(--fai-accent);
  --blue-dark: var(--fai-accent);
  --coral: #e57a3c;
  --coral-dark: #ffb57a;
  --white: var(--fai-surface);
  --muted: var(--fai-ink-2);
  --line: var(--fai-line);
  --line-strong: #5a4a36;
  --wash: #18130d;
  --focus: var(--fai-focus);
  --radius: 10px;
  --display: var(--fai-display);
  --body: var(--fai-body);
  --mono: var(--fai-mono);
}
* { box-sizing: border-box; }
html { background: var(--paper); color: var(--ink); font-family: var(--body); line-height: 1.5; }
body { margin: 0; padding: 0 max(24px, env(safe-area-inset-right)) 0 max(24px, env(safe-area-inset-left)); }
button, input, select { font: inherit; color: inherit; }
button, select, input[type="range"], summary { cursor: pointer; }
button, select { min-height: 44px; }
button { -webkit-tap-highlight-color: transparent; }
button:disabled, fieldset:disabled { cursor: not-allowed; opacity: .55; }
button:disabled { pointer-events: none; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 4px; }
a { color: var(--blue-dark); text-underline-offset: 4px; }
a:hover { color: var(--coral-dark); }
[hidden] { display: none !important; }
h1, h2, h3, p, figure, dl, dd { margin: 0; }
h1, h2, h3 { line-height: 1.12; }
em { font-weight: normal; }
svg { flex: 0 0 auto; }
button svg, .tab svg, .tank-help svg { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.masthead, main, .page-footer { width: min(100%, 1536px); margin-inline: auto; }
.masthead { display: flex; align-items: center; justify-content: space-between; gap: 32px; padding-block: 30px 20px; }
.identity { display: flex; align-items: center; gap: 18px; }
.brand-mark { width: 39px; height: 47px; fill: var(--blue); }
.brand-mark path + path { fill: none; stroke: var(--white); stroke-width: 1.4; stroke-linecap: round; }
.eyebrow { font-size: 11px; font-weight: 650; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
h1 { font-family: var(--display); font-size: clamp(30px, 2.65vw, 44px); font-weight: normal; letter-spacing: -.045em; margin-top: 5px; }
h1 em { color: var(--blue-dark); }
.local-mark { font-size: 12px; font-weight: 600; text-align: right; white-space: nowrap; }
.status-dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--blue); margin-right: 6px; }
.local-sub { display: block; font-family: var(--display); font-size: 15px; font-style: italic; font-weight: normal; color: var(--muted); margin-top: 3px; }
.intro-row { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 6px 24px; color: var(--muted); font-size: 14px; margin-bottom: 24px; }
.intro-row > span { font-size: 12px; }
.experiments { border-bottom: 1px solid var(--line-strong); margin-bottom: 24px; }
.tabs { display: flex; gap: 24px; }
.tab { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 13px 5px 16px; border: 0; border-bottom: 3px solid transparent; margin-bottom: -1px; background: transparent; color: var(--muted); font-size: 14px; font-weight: 600; }
.tab[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--blue); }
.tab:hover { color: var(--blue-dark); background: rgb(255 255 255 / 40%); }
.tab-note { margin-left: 5px; font-size: 10px; font-weight: 500; letter-spacing: .03em; border: 1px solid var(--line); padding: 2px 6px; border-radius: 4px; }
.tab[aria-selected="true"] .tab-note { border-color: var(--line-strong); }
.lab-grid, .science-grid { display: grid; grid-template-columns: minmax(0, 1fr) 296px; gap: 24px; align-items: start; }
.tank-column, .science-main { min-width: 0; }
.tank-instrument { border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--white); overflow: hidden; }
.instrument-heading { display: flex; justify-content: space-between; gap: 16px; align-items: center; padding: 20px 22px 16px; }
.instrument-heading h2 { margin-top: 7px; font-family: var(--display); font-size: clamp(24px, 2.1vw, 32px); font-weight: normal; letter-spacing: -.035em; }
.instrument-heading .eyebrow { font-size: 10px; }
.run-status { display: inline-flex; align-items: center; gap: 7px; font-size: 11px; white-space: nowrap; }
.run-status::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--blue); }
.run-status[data-status="paused"]::before { background: var(--muted); border-radius: 1px; }
.run-status[data-status="error"] { color: var(--coral-dark); }
.run-status[data-status="error"]::before { background: var(--coral); }
.tank-toolbar { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; border-block: 1px solid var(--line); padding: 10px 16px; }
.transport { display: flex; gap: 6px; }
.playback-control { display: grid; grid-template-columns: minmax(220px, 1fr) minmax(150px, 1fr); align-items: center; gap: 12px 24px; padding: 12px 18px 16px; border-bottom: 1px solid var(--line); background: var(--wash); }
.playback-control .range-field, .playback-control .field-help { margin: 0; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 7px; background: var(--white); border: 1px solid var(--line-strong); border-radius: 5px; padding: 8px 12px; font-size: 12px; font-weight: 600; line-height: 1.3; transition: background-color 130ms, border-color 130ms; }
.button:hover { background: var(--paper); border-color: var(--blue-dark); }
.button:active { background: var(--line); }
.button.primary { color: var(--white); background: var(--blue-dark); border-color: var(--blue-dark); }
.button.primary:hover { background: var(--ink); border-color: var(--ink); }
.button.wide { width: 100%; margin-top: 10px; }
.view-switch { display: inline-flex; gap: 0; padding: 0; margin: 0; border: 1px solid var(--line-strong); border-radius: 5px; min-width: 0; }
.view-switch label { position: relative; display: flex; cursor: pointer; }
.view-switch input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.view-switch span { display: flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 11px; font-size: 11px; border-radius: 3px; color: var(--muted); }
.view-switch input:checked + span { background: var(--paper); color: var(--blue-dark); font-weight: 700; box-shadow: inset 0 -2px var(--blue); }
.view-switch input:focus-visible + span { outline: 3px solid var(--focus); outline-offset: 2px; }
.tank-viewport { position: relative; isolation: isolate; background: var(--wash); }
#tank-canvas { display: block; width: 100%; aspect-ratio: 16 / 9; height: auto; touch-action: none; cursor: crosshair; }
#tank-canvas:focus-visible { outline-offset: -5px; }
#tank-canvas.is-dragging { cursor: grabbing; }
.canvas-corner { position: absolute; top: 11px; left: 14px; color: var(--muted); font: 10px var(--mono); pointer-events: none; background: rgb(245 250 251 / 85%); padding: 4px 7px; border-radius: 3px; }
.crosshair { color: var(--blue); margin-right: 5px; font-size: 15px; }
.velocity-legend { position: absolute; bottom: 14px; right: 14px; display: grid; grid-template-columns: auto 100px auto; align-items: center; gap: 5px; padding: 8px; border: 1px solid var(--line); background: rgb(255 255 255 / 94%); border-radius: 4px; font: 10px var(--mono); }
.velocity-legend > span:last-child { grid-column: 1 / -1; text-align: center; font: 10px var(--body); }
.velocity-ramp { height: 6px; background: linear-gradient(90deg, var(--blue), #42a6b3, #b6b79a, var(--coral)); border-radius: 2px; }
.engine-error { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); width: min(85%, 500px); padding: 22px; border: 1px solid var(--coral); border-radius: var(--radius); background: var(--white); color: var(--coral-dark); font-size: 14px; line-height: 1.6; box-shadow: 0 4px 20px rgb(21 59 74 / 8%); }
.instrument-readings { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); padding: 16px 8px; border-top: 1px solid var(--line-strong); background: var(--wash); }
.instrument-readings > div { padding: 0 14px; border-right: 1px solid var(--line); }
.instrument-readings > div:last-child { border: 0; }
.instrument-readings span { display: block; color: var(--muted); font-size: 10px; line-height: 1.4; }
.instrument-readings strong { display: block; font: 19px var(--mono); font-weight: normal; margin-top: 5px; letter-spacing: -.045em; white-space: nowrap; }
.instrument-readings small { font: 11px var(--body); letter-spacing: 0; }
#stat-health { font: 12px var(--body); line-height: 1.8; letter-spacing: 0; }
.tank-help { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 4px 12px; padding: 5px 18px; border-top: 1px solid var(--line); font-size: 11px; color: var(--muted); }
.tank-help p { display: flex; align-items: center; gap: 6px; }
.tank-help svg { width: 17px; height: 17px; }
.text-button { min-height: 44px; background: none; border: 0; padding: 8px 2px; color: var(--blue-dark); font-size: 11px; font-weight: 600; text-decoration: underline; text-underline-offset: 3px; }
.text-button:hover { color: var(--coral-dark); }
.text-button span { margin-left: 5px; }
.control-desk { background: rgb(255 255 255 / 52%); border: 1px solid var(--line); border-radius: var(--radius); padding: 19px 20px 8px; }
.desk-title { display: flex; justify-content: space-between; align-items: center; padding-bottom: 17px; }
.desk-title h2, .desk-title h3 { font-family: var(--display); font-weight: normal; font-size: 22px; letter-spacing: -.04em; }
.desk-title > span { color: var(--blue); font-size: 21px; }
.control-group { min-width: 0; border: 0; border-top: 1px solid var(--line); padding: 15px 0 21px; margin: 0; }
.control-group legend { padding: 0 8px 0 0; font-size: 11px; font-weight: 650; letter-spacing: .025em; }
.select-label { display: block; color: var(--muted); font-size: 11px; margin-bottom: 6px; }
select { display: block; width: 100%; min-width: 0; background: var(--white); border: 1px solid var(--line-strong); padding: 9px 28px 9px 10px; border-radius: 4px; font-size: 12px; }
.field-help { font-size: 11px; line-height: 1.55; color: var(--muted); margin-top: 7px; }
.range-field { margin-top: 13px; min-width: 0; }
.control-group > .range-field:first-of-type { margin-top: 0; }
.control-group select + .range-field { margin-top: 13px; }
.label-line { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; min-width: 0; }
.label-line label { font-size: 12px; }
.label-line output { flex-shrink: 0; font: 11px var(--mono); color: var(--blue-dark); font-variant-numeric: tabular-nums; }
input[type="range"] { display: block; width: 100%; margin: 0; min-width: 44px; height: 44px; padding: 0; accent-color: var(--blue); background: transparent; }
input[type="range"]::-webkit-slider-runnable-track { height: 3px; border-radius: 2px; background: var(--line-strong); }
input[type="range"]::-webkit-slider-thumb { margin-top: -6px; }
input[type="range"]::-moz-range-track { height: 3px; border-radius: 2px; background: var(--line-strong); }
input[type="range"]::-moz-range-thumb { background: var(--blue-dark); border: 2px solid var(--white); width: 15px; height: 15px; }
.range-extents { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); font-size: 10px; line-height: 1.4; margin-top: -5px; }
.range-field > .field-help { margin-top: -4px; }
.position-controls { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.model-note { display: flex; align-items: flex-start; gap: 16px; margin: 22px 0 14px; padding: 0 4px; }
.note-marker { font: italic 36px var(--display); color: var(--coral-dark); width: 28px; text-align: center; flex-shrink: 0; line-height: 1; }
.model-note h3 { font-size: 13px; line-height: 1.4; margin-bottom: 6px; font-weight: 650; }
.model-note p { color: var(--muted); font-size: 12px; line-height: 1.75; max-width: 90ch; }
.model-note p + p { margin-top: 6px; }
.model-note a { display: inline-flex; align-items: center; min-height: 44px; }
.diagnostics { margin-top: 15px; border-top: 1px solid var(--line); }
.diagnostics summary { min-height: 44px; padding: 12px 4px; font-size: 12px; color: var(--blue-dark); }
.diagnostic-body { padding: 5px 10px 18px; color: var(--muted); font-size: 12px; }
.diagnostic-body dl { margin-block: 12px; max-width: 520px; }
.diagnostic-body dl > div { display: flex; justify-content: space-between; gap: 16px; padding-block: 5px; border-bottom: 1px solid var(--line); }
.diagnostic-body dd { font-family: var(--mono); color: var(--ink); }
kbd { display: inline-block; min-width: 20px; text-align: center; padding: 1px 4px; border: 1px solid var(--line-strong); border-radius: 3px; background: var(--wash); font: 11px var(--mono); }
.science-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; margin: 8px 0 26px; }
.science-heading h2 { font-family: var(--display); font-weight: normal; font-size: clamp(30px, 3vw, 44px); letter-spacing: -.045em; margin: 8px 0 10px; }
.science-heading h2 em { color: var(--blue-dark); }
.science-heading p:not(.eyebrow) { font-size: 14px; color: var(--muted); max-width: 65ch; }
.scope-label { display: inline-block; max-width: 290px; border-left: 2px solid var(--coral); padding: 6px 0 6px 14px; font-size: 12px; line-height: 1.6; color: var(--coral-dark); }
.formula-strip { display: flex; justify-content: space-around; gap: 14px; flex-wrap: wrap; padding: 19px 15px; border: 1px solid var(--line-strong); border-bottom: 0; border-radius: var(--radius) var(--radius) 0 0; background: var(--white); font: 19px var(--display); }
.formula-strip sup { font-size: 12px; }
.formula-strip > span { white-space: nowrap; }
.science-figure { margin: 0; padding: 10px 12px 14px; background: var(--white); border: 1px solid var(--line-strong); border-top: 1px solid var(--line); border-radius: 0 0 var(--radius) var(--radius); }
.science-figure canvas { width: 100%; height: auto; display: block; aspect-ratio: 32 / 15; }
.science-figure figcaption { font-size: 11px; color: var(--muted); padding: 8px 14px 0; }
.science-readings { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; margin-top: 18px; }
.science-readings > div { padding-left: 14px; border-left: 2px solid var(--blue); }
.science-readings > div:nth-child(2) { border-color: var(--coral); }
.science-readings > div:nth-child(3) { border-color: var(--ink); }
.science-readings dt { font-size: 11px; color: var(--muted); }
.science-readings dd { font: 26px var(--mono); letter-spacing: -.04em; margin-top: 5px; }
.science-readings small { font: 12px var(--body); letter-spacing: 0; }
.science-controls { padding-bottom: 22px; }
.science-controls .range-field { margin: 8px 0 20px; }
.science-controls .desk-title { margin-bottom: 13px; border-bottom: 1px solid var(--line); }
.tau-readout { padding: 18px; margin: 18px 0 22px; border-left: 2px solid var(--blue); background: var(--white); }
.tau-readout span { display: block; font-size: 11px; color: var(--muted); }
.tau-readout strong { display: block; font: 37px var(--display); margin-block: 4px; }
.science-aside-note { font-size: 12px; line-height: 1.75; color: var(--muted); margin-top: 24px; }
.page-footer { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px 32px; border-top: 1px solid var(--line-strong); margin-block: 32px 0; padding-block: 22px max(26px, env(safe-area-inset-bottom)); font-size: 11px; }
.page-footer strong { font-weight: 650; }
.page-footer p span { display: block; margin-top: 5px; color: var(--muted); }
.page-footer a { display: block; min-height: 44px; text-decoration: none; text-align: right; }
.page-footer a span { display: block; color: var(--muted); font-size: 10px; margin-top: 5px; }
.page-footer a:hover { text-decoration: underline; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: 10px; left: 20px; z-index: 20; transform: translateY(-200%); background: var(--white); padding: 12px 20px; border: 2px solid var(--focus); border-radius: 4px; }
.skip-link:focus { transform: none; }
.noscript-note { border: 1px solid var(--coral); padding: 20px; margin-top: 20px; }
@media (min-width: 1550px) {
  .lab-grid, .science-grid { grid-template-columns: minmax(0, 1fr) 316px; gap: 28px; }
  .control-desk { padding-inline: 24px; }
}
@media (max-width: 1130px) {
  body { padding-inline: 20px; }
  .lab-grid, .science-grid { grid-template-columns: minmax(0, 1fr) 264px; gap: 18px; }
  .control-desk { padding-inline: 16px; }
  .tab-note { display: none; }
  .instrument-heading { padding-inline: 16px; }
  .instrument-readings > div { padding-inline: 9px; }
  .instrument-readings strong { font-size: 16px; }
  .science-readings dd { font-size: 22px; }
  .formula-strip { font-size: 17px; }
}
@media (max-width: 880px) {
  .masthead { padding-top: 24px; }
  .lab-grid, .science-grid { grid-template-columns: minmax(0, 1fr); }
  .control-desk { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 24px; padding: 20px; }
  .control-desk > .desk-title { grid-column: 1 / -1; }
  .control-desk > .control-group:first-of-type { grid-column: 1 / -1; }
  .science-controls { display: block; }
  .science-controls .range-field { max-width: none; }
  .science-controls .tau-readout { max-width: 400px; }
  .science-controls .button.wide { max-width: 320px; display: flex; }
  .science-heading { flex-wrap: wrap; gap: 16px; }
  .scope-label { max-width: none; }
  .tabs { justify-content: space-between; gap: 14px; }
  .tab { font-size: 12px; }
  .intro-row > span { display: none; }
}
@media (max-width: 560px) {
  body { padding-inline: 12px; }
  .masthead { gap: 14px; padding-block: 22px 16px; }
  .identity { gap: 10px; }
  .brand-mark { width: 27px; height: 35px; }
  .eyebrow { font-size: 9px; letter-spacing: .065em; }
  h1 { font-size: 29px; }
  .local-mark { display: none; }
  .intro-row { font-size: 12px; line-height: 1.6; margin-bottom: 14px; }
  .experiments { margin-bottom: 16px; }
  .tabs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 4px; }
  .tab { flex-direction: column; gap: 6px; font-size: 11px; line-height: 1.3; padding: 10px 4px 12px; }
  .tab svg { width: 18px; height: 18px; }
  .instrument-heading { gap: 8px; padding: 16px 12px; }
  .instrument-heading h2 { font-size: 24px; }
  .instrument-heading .eyebrow { font-size: 8px; }
  .run-status { font-size: 10px; gap: 4px; }
  .tank-toolbar { padding: 9px 10px; gap: 9px; }
  .transport { width: 100%; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .playback-control { grid-template-columns: minmax(0, 1fr); padding: 12px; gap: 10px; }
  .button { padding-inline: 9px; font-size: 11px; gap: 5px; }
  .button svg { width: 16px; height: 16px; }
  .view-switch { width: 100%; }
  .view-switch label { flex: 1; }
  .view-switch span { width: 100%; font-size: 11px; }
  .canvas-corner { font-size: 8px; left: 5px; top: 5px; padding: 1px 3px; }
  .crosshair { font-size: 11px; }
  .velocity-legend { right: 6px; bottom: 6px; font-size: 8px; padding: 4px; grid-template-columns: auto 55px auto; }
  .velocity-legend > span:last-child { font-size: 8px; }
  .instrument-readings { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px 0; padding-block: 12px; }
  .instrument-readings > div:nth-child(3) { border: 0; }
  .instrument-readings span { font-size: 9px; }
  .instrument-readings strong { font-size: 17px; }
  .tank-help { padding: 9px 10px 2px; }
  .tank-help p { font-size: 10px; }
  .tank-help .text-button { margin-left: 23px; }
  .control-desk { padding: 17px 15px 4px; column-gap: 18px; }
  .control-desk > .control-group { grid-column: 1 / -1; }
  .control-group { padding-block: 14px 20px; }
  .range-field { margin-top: 15px; }
  .label-line label { font-size: 14px; }
  .label-line output { font-size: 12px; }
  .field-help, .range-extents, .select-label { font-size: 12px; }
  select { font-size: 16px; }
  .model-note { gap: 9px; margin-top: 20px; }
  .model-note p { font-size: 14px; }
  .model-note h3 { font-size: 14px; }
  .diagnostic-body dl > div { flex-wrap: wrap; gap: 4px 10px; }
  .science-heading h2 { font-size: 31px; }
  .science-heading p:not(.eyebrow) { font-size: 14px; }
  .scope-label { font-size: 12px; }
  .formula-strip { display: grid; grid-template-columns: 1fr 1fr; font-size: 16px; padding: 16px 12px; }
  .poiseuille-formulas > span:first-child { grid-column: 1 / -1; }
  .science-figure { padding: 5px 2px 12px; }
  .science-figure canvas { aspect-ratio: 4 / 3; }
  .science-figure figcaption { font-size: 12px; padding-inline: 10px; }
  .science-readings { gap: 8px; }
  .science-readings > div { padding-left: 8px; }
  .science-readings dt { font-size: 11px; }
  .science-readings dd { font-size: 17px; overflow-wrap: anywhere; }
  .science-readings small { font-size: 10px; }
  .science-controls { padding-bottom: 20px; }
  .page-footer { display: block; margin-top: 22px; }
  .page-footer a { text-align: left; margin-top: 18px; }
  .engine-error { padding: 12px; font-size: 11px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}
@media (forced-colors: active) {
  .tab[aria-selected="true"] { border-bottom-color: Highlight; }
  .view-switch input:checked + span { outline: 2px solid Highlight; }
  .run-status::before { background: CanvasText; }
  input[type="range"] { forced-color-adjust: auto; }
}

/* FAI kit overrides */
html, body { background: var(--fai-bg); }
body { padding-inline: 0; }
main, .page-footer { padding-inline: max(20px, env(safe-area-inset-left)); }
.intro-row { align-items: baseline; padding-top: 22px; margin-bottom: 16px; }
.intro-row h1 { font-family: var(--fai-display); font-weight: 700; text-transform: uppercase; letter-spacing: .005em; font-size: clamp(26px, 3vw, 40px); color: var(--fai-ink); }
.intro-row h1 em, .instrument-heading h2 em, .science-heading h2 em { font-style: normal; color: var(--fai-accent); }
.intro-row p { color: var(--fai-ink-2); font-size: 14px; }
h2, h3, .desk-title h2, .desk-title h3, .instrument-heading h2, .science-heading h2 { font-family: var(--fai-display); font-weight: 700; text-transform: uppercase; letter-spacing: .005em; }
.button.primary { color: var(--fai-accent-ink); background: var(--fai-accent); border-color: var(--fai-accent); }
.button.primary:hover { background: #ffa463; border-color: #ffa463; }
.button { background: #2a2218; color: var(--fai-ink); }
.button:hover { background: #342a1e; border-color: #5a4a36; }
.tab:hover { background: rgb(255 255 255 / 4%); color: var(--fai-ink); }
.tab[aria-selected="true"] { border-bottom-color: var(--fai-accent); }
select { background: #120e09; color: var(--fai-ink); }
select option { background: #1c1710; }
.view-switch input:checked + span { background: #2a2218; color: var(--fai-accent); box-shadow: inset 0 -2px var(--fai-accent); }
.tank-viewport, .science-figure, .formula-strip { background: #f5fafb; }
.formula-strip { color: #153b4a; font-family: var(--fai-mono); font-size: 16px; }
.science-figure figcaption { color: #486874; }
.control-desk { background: var(--fai-surface); }
.tau-readout { background: #18130d; }
.tau-readout strong { font-family: var(--fai-mono); font-weight: 500; }
.science-readings dd, .instrument-readings strong { color: var(--fai-ink); }
.engine-error { background: #3a1610; color: #ffb4a3; }
.velocity-legend { background: rgb(255 255 255 / 94%); color: #153b4a; }
.velocity-ramp { background: linear-gradient(90deg, #137da5, #42a6b3, #b6b79a, #cd6248); }
.diagnostics summary { color: var(--fai-ink); font-family: var(--fai-mono); }
.diagnostics summary:hover { color: var(--fai-accent); }
.page-footer { display: flex; gap: 24px; justify-content: flex-start; font: 13px var(--fai-mono); }
.page-footer a { color: var(--fai-ink); text-align: left; display: inline-flex; align-items: center; }
.page-footer a:hover { color: var(--fai-accent); }
.skip-link { background: var(--fai-surface); color: var(--fai-ink); top: 60px; }
a { color: var(--fai-ink); text-decoration-color: var(--fai-accent); }
a:hover { color: var(--fai-accent); }
@media (max-width: 560px) {
  main, .page-footer { padding-inline: 12px; }
  .intro-row { padding-top: 14px; }
  .formula-strip { font-size: 14px; }
}