/* Layout: one centred column (max 1120px), chunky "toy-block" buttons, lessons as colour tiles. */
:root {
  --bg: #F2F5FB;
  --surface: #FFFFFF;
  --surface-2: #E7ECF7;
  --ink: #1A2042;
  --ink-soft: #545E89;
  --line: #D3DAEB;
  --tang: #F2621F;
  --teal: #0C9488;
  --sun: #F5B315;
  --berry: #D93A72;
  --grass: #2E9C46;
  --sky: #3672F0;
  --on-accent: #FFFFFF;
  --good: #1D8A4C;
  --bad: #C7372F;
  --f-display: 'Baloo 2', 'Trebuchet MS', system-ui, sans-serif;
  --f-body: 'Atkinson Hyperlegible', 'Segoe UI', system-ui, sans-serif;
  --f-mono: 'JetBrains Mono', ui-monospace, Consolas, monospace;
  --r: 18px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #10132A; --surface: #1A1E3C; --surface-2: #242A50; --ink: #EEF1FF; --ink-soft: #A7AFD8; --line: #333A67;
    --tang: #FF7B42; --teal: #2EC0B2; --sun: #FFC94D; --berry: #F2629A; --grass: #55C46B; --sky: #6D98FF;
    --on-accent: #10132A; --good: #4CC97E; --bad: #F06A60; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #10132A; --surface: #1A1E3C; --surface-2: #242A50; --ink: #EEF1FF; --ink-soft: #A7AFD8; --line: #333A67;
  --tang: #FF7B42; --teal: #2EC0B2; --sun: #FFC94D; --berry: #F2629A; --grass: #55C46B; --sky: #6D98FF;
  --on-accent: #10132A; --good: #4CC97E; --bad: #F06A60; color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { overflow-x: hidden; }
body { background: var(--bg); color: var(--ink); font-family: var(--f-body); font-size: 17px; line-height: 1.55; }
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--surface); }
h1, h2, h3 { font-family: var(--f-display); line-height: 1.12; margin: 0; text-wrap: balance; font-weight: 800; }
h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: 1.25rem; font-weight: 700; }
p { margin: 0; }
a { color: var(--sky); }
:focus-visible { outline: 3px solid var(--sky); outline-offset: 3px; border-radius: 8px; }
.wrap { max-width: 1120px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.section { padding-block: 40px; display: grid; gap: 22px; }
.row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.fine { font-size: .9rem; color: var(--ink-soft); }
.lead { font-size: 1.2rem; color: var(--ink-soft); max-width: 36em; }
.eyebrow { font-family: var(--f-mono); font-size: .8rem; letter-spacing: .08em; text-transform: uppercase; color: var(--teal); }
.caption { font-size: .92rem; color: var(--ink-soft); }
.step-count { font-family: var(--f-mono); font-size: .8rem; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-soft); }

/* Header */
.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; background: var(--surface); border-bottom: 2px solid var(--line); }
.top-in { max-width: 1120px; margin: 0 auto; padding-block: 10px; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px));
  display: grid; grid-template-columns: auto 1fr auto; gap: 8px 20px; align-items: center; }
.brand { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--ink); font-family: var(--f-display); font-weight: 800; font-size: 1.35rem; }
.brand .bit { width: 38px; height: 38px; }
.nav { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; }
.nav a { text-decoration: none; color: var(--ink-soft); font-weight: 700; padding: 8px 14px; border-radius: 999px; white-space: nowrap; }
.nav a:hover { color: var(--ink); background: var(--surface-2); }
.nav a.on { color: var(--ink); background: var(--surface-2); }
.acct { display: flex; gap: 8px; align-items: center; }
@media (max-width: 720px) {
  .top-in { grid-template-columns: 1fr auto; }
  .nav { grid-column: 1 / -1; grid-row: 2; justify-content: space-between; }
  .nav a { padding: 8px 10px; font-size: .95rem; }
}

/* Buttons */
.btn { font: 700 1.05rem/1 var(--f-body); display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 50px; padding: 0 22px; border-radius: 14px; border: 2px solid var(--line); background: var(--surface); color: var(--ink);
  box-shadow: 0 4px 0 var(--line); cursor: pointer; text-decoration: none; transition: transform .08s, box-shadow .08s; }
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(3px); box-shadow: 0 1px 0 var(--line); }
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none; }
.btn-primary { background: var(--tang); border-color: var(--tang); color: var(--on-accent); box-shadow: 0 4px 0 color-mix(in srgb, var(--tang) 60%, var(--ink)); }
.btn-primary:active { box-shadow: 0 1px 0 color-mix(in srgb, var(--tang) 60%, var(--ink)); }
.btn-teal { background: var(--teal); border-color: var(--teal); color: var(--on-accent); box-shadow: 0 4px 0 color-mix(in srgb, var(--teal) 60%, var(--ink)); }
.btn-berry { background: var(--berry); border-color: var(--berry); color: var(--on-accent); box-shadow: 0 4px 0 color-mix(in srgb, var(--berry) 60%, var(--ink)); }
.btn-sm { min-height: 40px; padding: 0 14px; font-size: .95rem; border-radius: 12px; box-shadow: 0 3px 0 var(--line); }
.linkish { background: none; border: 0; padding: 0; font: inherit; color: var(--sky); text-decoration: underline; cursor: pointer; }

.chip { display: inline-block; font-family: var(--f-mono); font-size: .75rem; letter-spacing: .04em; padding: 4px 10px; border-radius: 999px; background: var(--surface-2); color: var(--ink-soft); }
.kid-chip { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; color: var(--ink); text-decoration: none; padding: 4px 12px 4px 4px; border-radius: 999px; background: var(--surface-2); }
.avatar { width: 32px; height: 32px; border-radius: 50%; display: inline-grid; place-items: center; color: var(--on-accent); font-family: var(--f-display); font-weight: 800; flex: none; }

/* Tones */
.tone-sun { --tone: var(--sun); } .tone-teal { --tone: var(--teal); } .tone-berry { --tone: var(--berry); }
.tone-tang { --tone: var(--tang); } .tone-sky { --tone: var(--sky); } .tone-grass { --tone: var(--grass); }
.bg-tone { background: var(--tone); }

/* Mascot */
.bit-head { fill: var(--sky); } .bit-ear { fill: color-mix(in srgb, var(--sky) 70%, var(--ink)); }
.bit-face { fill: var(--surface); } .bit-eye { fill: var(--ink); } .bit-mouth { stroke: var(--ink); fill: none; }
.bit-bulb { fill: var(--sun); } .bit-stroke { stroke: var(--ink); } .bit-body { fill: color-mix(in srgb, var(--sky) 70%, var(--ink)); }
.bit-cheek { fill: var(--berry); opacity: .45; }

/* Hero */
.hero { display: grid; grid-template-columns: 1.25fr 1fr; gap: 32px; align-items: center; padding-block: 48px 24px; }
.hero-copy { display: grid; gap: 18px; min-width: 0; }
.hero h1 span { color: var(--tang); }
.hero-art { position: relative; display: grid; place-items: center; padding: 24px; background: var(--surface); border: 2px solid var(--line); border-radius: 28px; min-width: 0; }
.hero-art .bit { width: min(260px, 70%); height: auto; animation: bob 3.2s ease-in-out infinite; }
.bubble { background: var(--sun); color: #1A2042; font-family: var(--f-display); font-weight: 700; font-size: 1.15rem; line-height: 1.25; padding: 12px 16px; border-radius: 18px 18px 18px 4px; max-width: 280px; justify-self: start; }
@keyframes bob { 50% { transform: translateY(-8px) rotate(-2deg); } }
@media (prefers-reduced-motion: reduce) { .hero-art .bit { animation: none; } * { scroll-behavior: auto; } }
@media (max-width: 820px) { .hero { grid-template-columns: 1fr; padding-top: 28px; } }

.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; counter-reset: s; }
.steps li { counter-increment: s; background: var(--surface); border: 2px solid var(--line); border-radius: var(--r); padding: 20px; display: grid; gap: 6px; align-content: start; }
.steps li::before { content: counter(s); font-family: var(--f-display); font-weight: 800; font-size: 1.4rem; width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: var(--tone); color: var(--on-accent); }
@media (max-width: 720px) { .steps { grid-template-columns: 1fr; } }

/* Lesson cards */
.lgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 18px; }
.lcard { display: grid; grid-template-rows: auto 1fr; text-decoration: none; color: var(--ink); background: var(--surface); border: 2px solid var(--line); border-radius: 22px; overflow: hidden; transition: transform .12s; }
.lcard:hover { transform: translateY(-3px); }
.lcard-art { background: color-mix(in srgb, var(--tone) 22%, var(--surface)); display: grid; place-items: center; padding: 18px; }
.lcard-art svg { width: 84px; height: 84px; }
.lcard-body { padding: 16px 18px 18px; display: grid; gap: 8px; align-content: start; }
.lcard-body p { color: var(--ink-soft); font-size: .98rem; }
.lcard-meta { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-top: 4px; font-size: .88rem; color: var(--ink-soft); }
.lock { font-family: var(--f-mono); font-size: .72rem; letter-spacing: .05em; text-transform: uppercase; padding: 4px 9px; border-radius: 999px; background: var(--ink); color: var(--bg); }
.stars { display: inline-flex; gap: 2px; }
.stars svg { width: 18px; height: 18px; }
.star-on { fill: var(--sun); } .star-off { fill: var(--line); }
.icon-ink { fill: none; stroke: var(--ink); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.icon-fill { fill: var(--tone); }
.icon-soft { fill: var(--surface); stroke: var(--ink); stroke-width: 3; }

/* Trust */
.trust { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 28px; margin: 0; }
.trust div { display: grid; gap: 4px; padding-block: 14px; border-top: 2px solid var(--line); }
.trust dt { font-family: var(--f-display); font-weight: 700; font-size: 1.15rem; }
.trust dd { margin: 0; color: var(--ink-soft); }
@media (max-width: 640px) { .trust { grid-template-columns: 1fr; } }

/* Pricing */
.billing { display: inline-flex; background: var(--surface-2); border-radius: 999px; padding: 4px; gap: 4px; justify-self: start; }
.billing button { font: 700 .95rem var(--f-body); border: 0; background: none; color: var(--ink-soft); padding: 8px 16px; border-radius: 999px; cursor: pointer; min-height: 40px; }
.billing button.on { background: var(--surface); color: var(--ink); box-shadow: 0 2px 0 var(--line); }
.plans { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; align-items: start; }
.plan { background: var(--surface); border: 2px solid var(--line); border-radius: 22px; padding: 22px; display: grid; gap: 14px; }
.plan.featured { border-color: var(--tang); box-shadow: 0 6px 0 color-mix(in srgb, var(--tang) 35%, transparent); }
.plan .price { font-family: var(--f-display); font-weight: 800; font-size: 2.6rem; line-height: 1; font-variant-numeric: tabular-nums; }
.plan .price small { font-size: 1rem; font-weight: 600; color: var(--ink-soft); }
.plan ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.plan li { padding-left: 28px; position: relative; }
.plan li::before { content: ""; position: absolute; left: 4px; top: .45em; width: 12px; height: 7px; border-left: 3px solid var(--teal); border-bottom: 3px solid var(--teal); transform: rotate(-45deg); }
.plan .btn { width: 100%; }
.badge { justify-self: start; font-family: var(--f-mono); font-size: .72rem; letter-spacing: .06em; text-transform: uppercase; background: var(--tang); color: var(--on-accent); padding: 4px 10px; border-radius: 999px; }
@media (max-width: 860px) { .plans { grid-template-columns: 1fr; } }

/* Tutorials */
.filters { display: flex; flex-wrap: wrap; gap: 8px; }
.filters button { font: 700 .95rem var(--f-body); min-height: 42px; padding: 0 16px; border-radius: 999px; border: 2px solid var(--line); background: var(--surface); color: var(--ink-soft); cursor: pointer; }
.filters button.on { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.tlist { display: grid; gap: 12px; }
.tut { background: var(--surface); border: 2px solid var(--line); border-radius: var(--r); }
.tut summary { list-style: none; cursor: pointer; padding: 16px 18px; display: grid; grid-template-columns: 1fr auto; gap: 4px 12px; align-items: center; }
.tut summary::-webkit-details-marker { display: none; }
.tut summary h3 { font-size: 1.15rem; }
.tut summary p { grid-column: 1; color: var(--ink-soft); font-size: .95rem; }
.tut summary .chip { grid-column: 2; grid-row: 1 / span 2; }
.tut-body { padding: 0 18px 18px; display: grid; gap: 14px; }
.tut-body ol { margin: 0; padding-left: 1.4em; display: grid; gap: 6px; max-width: 62ch; }
.video-slot { display: flex; gap: 12px; align-items: center; padding: 12px 14px; border-radius: 14px; background: var(--surface-2); color: var(--ink-soft); font-size: .92rem; }
.play { width: 36px; height: 36px; border-radius: 50%; background: var(--ink); flex: none; display: grid; place-items: center; }
.play::after { content: ""; border-left: 12px solid var(--bg); border-top: 7px solid transparent; border-bottom: 7px solid transparent; margin-left: 3px; }

/* Panels / parents */
.panel { background: var(--surface); border: 2px solid var(--line); border-radius: 22px; padding: 22px; display: grid; gap: 14px; min-width: 0; }
.cols { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; align-items: start; }
@media (max-width: 760px) { .cols { grid-template-columns: 1fr; } }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; margin: 0; }
.kv dt { color: var(--ink-soft); } .kv dd { margin: 0; font-weight: 700; }
.kids { display: grid; gap: 8px; }
.kid-row { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 14px; border: 2px solid transparent; }
.kid-row.on { border-color: var(--teal); background: color-mix(in srgb, var(--teal) 10%, var(--surface)); }
.kid-row .grow { flex: 1; min-width: 0; }
.table-wrap { overflow-x: auto; }
table.prog { border-collapse: collapse; width: 100%; font-size: .95rem; }
table.prog th, table.prog td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
table.prog th { font-family: var(--f-mono); font-size: .75rem; letter-spacing: .04em; text-transform: uppercase; color: var(--ink-soft); font-weight: 500; }

/* Lesson page */
.lesson { padding-block: 24px 48px; display: grid; gap: 18px; }
.back { font-weight: 700; text-decoration: none; justify-self: start; }
.lesson-head { display: grid; gap: 8px; justify-items: start; }
.lesson-head p { color: var(--ink-soft); max-width: 60ch; }
.stage { background: var(--surface); border: 2px solid var(--line); border-radius: 26px; padding: clamp(16px, 3vw, 28px); min-width: 0; }
.locked { display: grid; grid-template-columns: auto 1fr; gap: 24px; align-items: center; }
.locked .bit { width: 140px; height: auto; }
@media (max-width: 600px) { .locked { grid-template-columns: 1fr; justify-items: start; } }

/* Story + quiz */
.story { display: grid; grid-template-columns: 200px 1fr; gap: 28px; align-items: center; }
.story-art .bit { width: 100%; height: auto; }
.story-text { display: grid; gap: 14px; min-width: 0; }
.big { font-size: 1.3rem; line-height: 1.5; max-width: 34em; }
.dots { display: flex; gap: 6px; }
.dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--line); }
.dots i.on { background: var(--tang); }
@media (max-width: 640px) { .story { grid-template-columns: 1fr; } .story-art { width: 140px; } }
.quiz { display: grid; gap: 16px; max-width: 680px; }
.options { display: grid; gap: 10px; }
.opt { font: 700 1.1rem var(--f-body); text-align: left; padding: 14px 18px; min-height: 56px; border-radius: 16px; border: 2px solid var(--line); background: var(--surface); color: var(--ink); cursor: pointer; box-shadow: 0 3px 0 var(--line); }
.opt:hover:not(:disabled) { border-color: var(--sky); }
.opt.right { border-color: var(--good); background: color-mix(in srgb, var(--good) 14%, var(--surface)); }
.opt.wrong { border-color: var(--bad); background: color-mix(in srgb, var(--bad) 12%, var(--surface)); }
.opt:disabled { cursor: default; }
.feedback { display: grid; gap: 12px; justify-items: start; }

/* Labs (sort / doodle / line / maze) */
.lab { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 28px; }
@media (max-width: 820px) { .lab { grid-template-columns: 1fr; } }
.lab-main, .lab-side { display: grid; gap: 12px; align-content: start; min-width: 0; }
.monster { width: 200px; height: 200px; max-width: 100%; justify-self: center; background: var(--surface-2); border-radius: 24px; }
.map { width: 100%; max-width: 340px; aspect-ratio: 1; height: auto; border-radius: 18px; }
.say { display: grid; gap: 10px; justify-items: start; background: color-mix(in srgb, var(--sun) 25%, var(--surface)); padding: 14px 16px; border-radius: 16px; }
.legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: .9rem; color: var(--ink-soft); }
.legend i { display: inline-block; width: 12px; height: 12px; border-radius: 50%; margin-right: 6px; vertical-align: -1px; }
.pad-wrap { justify-self: center; width: min(300px, 100%); }
.pad { width: 100%; aspect-ratio: 1; height: auto; background: var(--surface-2); border: 3px dashed var(--line); border-radius: 22px; touch-action: none; cursor: crosshair; display: block; }
.class-names { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.class-names label, .field { display: grid; gap: 4px; font-weight: 700; font-size: .9rem; color: var(--ink-soft); }
input[type="text"], input[type="email"], input[type="number"], select {
  font: 1.05rem var(--f-body); color: var(--ink); background: var(--surface); border: 2px solid var(--line); border-radius: 12px; padding: 10px 12px; min-height: 48px; width: 100%; min-width: 0; }
input:focus { border-color: var(--sky); outline: none; }
.gallery { display: grid; gap: 8px; }
.gallery .g-row { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.gallery .g-name { font-weight: 700; min-width: 70px; }
.gallery img { width: 44px; height: 44px; border-radius: 10px; background: var(--surface-2); border: 2px solid var(--line); }
.mini-grid { width: 128px; height: 128px; image-rendering: pixelated; border-radius: 10px; border: 2px solid var(--line); }
.bars { display: grid; gap: 8px; width: 100%; }
.bar { display: grid; grid-template-columns: 90px 1fr 48px; gap: 10px; align-items: center; font-weight: 700; font-variant-numeric: tabular-nums; }
.bar-track { height: 14px; background: var(--surface); border-radius: 999px; overflow: hidden; }
.bar-fill { height: 100%; border-radius: 999px; }

.chart { width: 100%; height: auto; max-width: 520px; touch-action: none; }
.chart text { fill: var(--ink-soft); font: 12px var(--f-mono); }
.chart .axis { stroke: var(--line); stroke-width: 2; }
.chart .grid { stroke: var(--line); stroke-width: 1; stroke-dasharray: 3 4; }
.chart .pt { fill: var(--sun); stroke: var(--ink); stroke-width: 2; }
.chart .miss { stroke: var(--berry); stroke-width: 2; }
.chart .fit { stroke: var(--tang); stroke-width: 4; stroke-linecap: round; }
.chart .handle { fill: var(--tang); stroke: var(--surface); stroke-width: 4; cursor: ns-resize; }
.chart .handle-hit { fill: transparent; cursor: ns-resize; }
.chart .pred { fill: var(--teal); }
.meter { height: 16px; background: var(--surface-2); border-radius: 999px; overflow: hidden; }
.meter > div { height: 100%; border-radius: 999px; transition: width .2s; }
.num { font-family: var(--f-display); font-weight: 800; font-size: 2rem; line-height: 1; font-variant-numeric: tabular-nums; }
input[type="range"] { width: 100%; accent-color: var(--teal); min-height: 36px; }

.maze { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; width: min(100%, 380px); justify-self: center; }
.cell { aspect-ratio: 1; border-radius: 12px; border: 2px solid var(--line); background: var(--surface); display: grid; place-items: center; position: relative; cursor: pointer; padding: 0; color: var(--ink); font: 700 1.2rem var(--f-body); }
.cell.puddle { background: color-mix(in srgb, var(--sky) 30%, var(--surface)); border-color: var(--sky); }
.cell.goal { background: color-mix(in srgb, var(--sun) 35%, var(--surface)); border-color: var(--sun); cursor: default; }
.cell.start { cursor: default; }
.cell svg { width: 70%; height: 70%; }
.cell .arrow { position: absolute; inset: 0; display: grid; place-items: center; }
.cell .arrow svg { width: 46%; height: 46%; }
.arrow-path { fill: var(--teal); }
.cell .bot { position: absolute; inset: 8%; z-index: 1; }
.cell .bot .bit { width: 100%; height: 100%; }
.stats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.stat { background: var(--surface-2); border-radius: 14px; padding: 10px 14px; display: grid; gap: 2px; }
.stat span { font-size: .85rem; color: var(--ink-soft); }
.stat b { font-family: var(--f-display); font-size: 1.5rem; font-variant-numeric: tabular-nums; }

/* Modal + toast */
.modal { position: fixed; inset: 0; z-index: 50; background: color-mix(in srgb, var(--ink) 45%, transparent); display: grid; place-items: center;
  padding: max(16px, env(safe-area-inset-top, 0px)) max(16px, env(safe-area-inset-right, 0px)) max(16px, env(safe-area-inset-bottom, 0px)) max(16px, env(safe-area-inset-left, 0px)); overflow-y: auto; }
.modal-card { background: var(--surface); color: var(--ink); border-radius: 24px; padding: 24px; width: min(480px, 100%); display: grid; gap: 14px; box-shadow: 0 10px 0 color-mix(in srgb, var(--ink) 25%, transparent); }
.modal-card form { display: grid; gap: 14px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: .95rem; }
.check input { width: 22px; height: 22px; margin-top: 2px; flex: none; accent-color: var(--teal); }
.notice { background: color-mix(in srgb, var(--sky) 12%, var(--surface)); border: 2px dashed color-mix(in srgb, var(--sky) 50%, var(--line)); border-radius: 14px; padding: 10px 14px; font-size: .92rem; }
.err { color: var(--bad); font-weight: 700; font-size: .92rem; }
.swatches { display: flex; gap: 10px; flex-wrap: wrap; }
.swatches label { cursor: pointer; }
.swatches input { position: absolute; opacity: 0; }
.swatches span { display: block; width: 42px; height: 42px; border-radius: 50%; border: 4px solid var(--surface); box-shadow: 0 0 0 2px var(--line); }
.swatches input:checked + span { box-shadow: 0 0 0 3px var(--ink); }
.swatches input:focus-visible + span { outline: 3px solid var(--sky); outline-offset: 3px; }
.done-stars { display: flex; gap: 8px; justify-content: center; }
.done-stars svg { width: 56px; height: 56px; }
.center { text-align: center; justify-items: center; }
.toast { position: fixed; left: 50%; transform: translateX(-50%); bottom: calc(20px + env(safe-area-inset-bottom, 0px)); z-index: 60; background: var(--ink); color: var(--bg); padding: 12px 18px; border-radius: 14px; font-weight: 700; max-width: calc(100% - 32px); }

.foot { border-top: 2px solid var(--line); background: var(--surface); margin-top: 24px; }
.foot-in { max-width: 1120px; margin: 0 auto; padding-block: 22px; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); display: grid; gap: 4px; }

/* Language switch */
.lang { display: inline-flex; background: var(--surface-2); border-radius: 999px; padding: 3px; gap: 2px; }
.lang button { font: 700 .8rem var(--f-mono); border: 0; background: none; color: var(--ink-soft); min-width: 38px; min-height: 34px; border-radius: 999px; cursor: pointer; }
.lang button.on { background: var(--surface); color: var(--ink); box-shadow: 0 2px 0 var(--line); }
@media (max-width: 480px) { .kid-chip .kid-name { display: none; } .kid-chip { padding-right: 4px; } }

/* School year: terms */
.terms { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 960px) { .terms { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .terms { grid-template-columns: 1fr; } }
.term { display: grid; gap: 8px; align-content: start; text-decoration: none; color: var(--ink); background: var(--surface); border: 2px solid var(--line); border-radius: 22px; padding: 18px; }
.term:hover { border-color: var(--sky); }
.term p { color: var(--ink-soft); font-size: .95rem; }
.term ul { margin: 4px 0 0; padding-left: 1.1em; display: grid; gap: 2px; font-size: .92rem; }
.term-n { font-family: var(--f-mono); font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; color: var(--tang); }
.term-block { display: grid; gap: 14px; padding-top: 10px; }
.term-block .lgrid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 1060px) { .term-block .lgrid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .term-block .lgrid { grid-template-columns: 1fr; } }
.term-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 14px; border-bottom: 2px solid var(--line); padding-bottom: 8px; }
.learned { background: color-mix(in srgb, var(--teal) 12%, var(--surface)); border-radius: 16px; padding: 12px 16px; display: grid; gap: 4px; text-align: left; }
.school-line { color: var(--ink-soft); }
.selectable { user-select: all; }
fieldset.bare { border: 0; padding: 0; margin: 0; display: grid; gap: 6px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* Video */
.video { display: grid; gap: 6px; max-width: 720px; }
.video-frame { position: relative; aspect-ratio: 16 / 9; max-width: 100%; border-radius: 16px; overflow: hidden; background: var(--ink); }
.video-frame iframe, .video-frame video { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.intro-video { background: var(--surface); border: 2px solid var(--line); border-radius: 18px; padding: 12px 16px; }
.intro-video summary { cursor: pointer; font-weight: 700; }
.intro-video[open] summary { margin-bottom: 12px; }

/* Brain cell */
.neuron-svg { width: 100%; max-width: 420px; height: auto; }
.neuron-svg text { fill: var(--ink-soft); font: 13px var(--f-body); }
.neuron-svg .wire { fill: none; stroke-linecap: round; }
.neuron-svg .n-in { fill: var(--surface-2); stroke: var(--ink); stroke-width: 3; }
.neuron-svg .n-cell { fill: color-mix(in srgb, var(--tang) 25%, var(--surface)); stroke: var(--ink); stroke-width: 3; }
.neuron-svg .n-th { fill: var(--ink); font: 700 15px var(--f-mono); }
.neuron-svg .n-out { fill: var(--surface-2); stroke: var(--ink); stroke-width: 3; }
.neuron-svg .n-out.lit { fill: var(--sun); }
.sliders { display: grid; gap: 10px; }
.sliders b { font-family: var(--f-mono); color: var(--ink); }
table.truth td, table.truth th { text-align: center; white-space: normal; padding: 6px 4px; font-size: .88rem; position: relative; }
@media (max-width: 480px) { table.truth td, table.truth th { font-size: .76rem; padding: 5px 2px; letter-spacing: 0; } }
table.truth tr.ok td:last-child { color: var(--good); font-weight: 700; }
table.truth tr.bad td { background: color-mix(in srgb, var(--bad) 8%, transparent); }
table.truth tr.bad td:last-child { color: var(--bad); font-weight: 700; }

/* Word predictor */
.sentence { min-height: 64px; padding: 14px 16px; border-radius: 16px; background: var(--surface-2); font-family: var(--f-display); font-weight: 700; font-size: 1.5rem; line-height: 1.3; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip-btn { font: 700 1.1rem var(--f-body); min-height: 48px; padding: 0 16px; border-radius: 14px; border: 2px solid var(--berry); background: color-mix(in srgb, var(--berry) 10%, var(--surface)); color: var(--ink); cursor: pointer; }
.chip-btn small { font: .75rem var(--f-mono); color: var(--ink-soft); margin-left: 4px; }
textarea { font: 1rem/1.5 var(--f-body); color: var(--ink); background: var(--surface); border: 2px solid var(--line); border-radius: 12px; padding: 10px 12px; width: 100%; min-width: 0; resize: vertical; }
textarea:focus, select:focus { border-color: var(--sky); outline: none; }
input[type="url"] { font: 1rem var(--f-body); color: var(--ink); background: var(--surface); border: 2px solid var(--line); border-radius: 12px; padding: 10px 12px; min-height: 48px; width: 100%; min-width: 0; }

/* Admin */
.panel.narrow { max-width: 560px; }
.admin-top { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: end; gap: 12px; }
.admin-tabs { display: flex; gap: 6px; flex-wrap: wrap; }
.admin-tabs a { text-decoration: none; font-weight: 700; color: var(--ink-soft); padding: 8px 14px; border-radius: 999px; border: 2px solid var(--line); background: var(--surface); }
.admin-tabs a.on { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.admin-bar { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; }
.admin-term { margin-top: 10px; }
table.admin-table td { white-space: normal; vertical-align: middle; }
table.admin-table td.order { white-space: nowrap; }
.pill { display: inline-block; font: .72rem var(--f-mono); letter-spacing: .03em; padding: 3px 8px; border-radius: 999px; background: var(--surface-2); color: var(--ink-soft); margin: 2px 2px 2px 0; }
.pill.on { background: color-mix(in srgb, var(--good) 18%, var(--surface)); color: var(--ink); }
.pill.off { background: var(--ink); color: var(--bg); }
.pill.warn { background: color-mix(in srgb, var(--sun) 40%, var(--surface)); color: var(--ink); }
.icon-btn { width: 34px; height: 34px; border-radius: 10px; border: 2px solid var(--line); background: var(--surface); color: var(--ink); font-weight: 700; cursor: pointer; }
.icon-btn:disabled { opacity: .35; cursor: default; }
.editor { display: grid; gap: 18px; }
.editor fieldset.panel { margin: 0; }
.editor legend { font-family: var(--f-display); font-weight: 800; font-size: 1.25rem; padding: 0 6px; }
.grid-fields { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
@media (max-width: 700px) { .pair { grid-template-columns: 1fr; } }
.field > span { display: flex; align-items: center; gap: 6px; }
.field.inline { display: flex; align-items: center; gap: 8px; }
.field.inline select { width: auto; min-height: 38px; }
input[readonly] { background: var(--surface-2); color: var(--ink-soft); }
.repeat { display: grid; gap: 12px; padding: 14px; border-radius: 16px; background: var(--surface-2); }
.repeat-head { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; }
.repeat-head h4 { margin: 0; font-family: var(--f-display); font-size: 1.1rem; }
.repeat-head .tools { margin-left: auto; }
.answer { display: grid; gap: 6px; padding: 10px; border-radius: 12px; background: var(--surface); }
.check.correct { font-weight: 700; color: var(--good); }
.video-field { display: grid; gap: 8px; align-content: start; min-width: 0; }
.upload { cursor: pointer; }
.admin-actions { display: flex; flex-wrap: wrap; gap: 12px; position: sticky; bottom: env(safe-area-inset-bottom, 0px); background: var(--bg); padding-block: 12px; border-top: 2px solid var(--line); }
.guide { display: grid; gap: 16px; }
.guide-toc { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: .95rem; }
.guide ul { margin: 0; padding-left: 1.2em; display: grid; gap: 6px; max-width: 72ch; }
.guide code { font: .85rem var(--f-mono); background: var(--surface-2); padding: 6px 8px; border-radius: 8px; display: block; overflow-x: auto; white-space: pre; }
textarea.code { font: .82rem/1.4 var(--f-mono); }

/* ---------- Characters ---------- */
.char { display: inline-block; width: 120px; aspect-ratio: 1; max-width: 100%; flex: none; }
.char svg { width: 100%; height: 100%; overflow: visible; display: block; }
.char .c-fill, .char .c-star { stroke: var(--ink); stroke-width: 2.5; stroke-linejoin: round; }
.char .c-fill2 { stroke: var(--ink); stroke-width: 2.5; stroke-linejoin: round; }
.char .c-light, .char .c-white, .char .c-ring, .char .c-paper, .char .c-book { stroke: var(--ink); stroke-width: 2; }
.char .c-eye, .char .c-ink { fill: var(--ink); }
.char .c-lid, .char .c-mouth, .char .c-whisker, .char .c-feather, .char .c-ink-line { fill: none; stroke: var(--ink); stroke-width: 3; stroke-linecap: round; }
.char .c-shine { fill: #fff; }
.char .c-cheek { fill: var(--berry); opacity: .45; }
.char .c-white { fill: #fff; }
.char .c-paper { fill: #fff; }
.char .c-tongue { fill: var(--berry); }
.char .c-tag, .char .c-cap { fill: var(--sun); stroke: var(--ink); stroke-width: 2; }
.char .c-acorn { fill: color-mix(in srgb, var(--tang) 55%, #6b3b12); stroke: var(--ink); stroke-width: 2; }
.char .c-spark { fill: var(--sun); }
.ch-dot { --c1: var(--tang); --c2: color-mix(in srgb, var(--tang) 70%, var(--ink)); --c3: color-mix(in srgb, var(--tang) 25%, #fff); }
.ch-pixel { --c1: var(--teal); --c2: color-mix(in srgb, var(--teal) 70%, var(--ink)); --c3: #fff; --c4: var(--sun); }
.ch-lexi { --c1: var(--berry); --c2: color-mix(in srgb, var(--berry) 70%, var(--ink)); --c3: color-mix(in srgb, var(--berry) 25%, #fff); --c4: var(--sun); }
.ch-vee { --c1: var(--sun); }
.ch-rae { --c1: color-mix(in srgb, var(--sun) 70%, var(--tang)); --c2: color-mix(in srgb, var(--tang) 75%, var(--ink)); --c3: color-mix(in srgb, var(--sun) 30%, #fff); --c4: var(--sky); }
.char .c-fill, .char .c-star { fill: var(--c1, var(--sky)); }
.char .c-fill2 { fill: var(--c2, var(--sky)); }
.char .c-light { fill: var(--c3, #fff); }
.char .c-accent { fill: var(--c4, var(--sun)); stroke: var(--ink); stroke-width: 2; }
.char .c-ring { fill: var(--surface); stroke-width: 3; }
.char .c-book { fill: var(--sky); }
.char .c-eye, .char .bit-eye { transform-box: fill-box; transform-origin: center; animation: blink 4.5s infinite; }

@keyframes blink { 0%, 92%, 100% { transform: scaleY(1); } 95% { transform: scaleY(.1); } }
@keyframes bob { 50% { transform: translateY(-6px); } }
@keyframes bounce { 0%, 100% { transform: translateY(0) scale(1, 1); } 30% { transform: translateY(-16px) scale(.97, 1.04); } 55% { transform: translateY(0) scale(1.06, .94); } 70% { transform: translateY(-5px); } }
@keyframes wave { 0%, 100% { transform: rotate(0); } 20% { transform: rotate(-9deg); } 40% { transform: rotate(8deg); } 60% { transform: rotate(-6deg); } 80% { transform: rotate(4deg); } }
@keyframes jump { 0%, 100% { transform: translateY(0); } 35% { transform: translateY(-34px) rotate(-6deg); } 60% { transform: translateY(0) scale(1.08, .92); } }
@keyframes thinky { 0%, 100% { transform: rotate(0) translateY(0); } 50% { transform: rotate(-7deg) translateY(-4px); } }
@keyframes spin { 0% { transform: rotate(0); } 70% { transform: rotate(370deg); } 100% { transform: rotate(360deg); } }
@keyframes shake { 0%, 100% { transform: translateX(0); } 15%, 45%, 75% { transform: translateX(-6px) rotate(-3deg); } 30%, 60%, 90% { transform: translateX(6px) rotate(3deg); } }
@keyframes pop { 0% { transform: scale(.4); opacity: 0; } 60% { transform: scale(1.15); opacity: 1; } 100% { transform: scale(1); } }
@keyframes peek { 0% { transform: translateX(-60px); opacity: 0; } 70% { transform: translateX(6px); opacity: 1; } 100% { transform: translateX(0); } }
@keyframes hop { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
@keyframes twinkle { 50% { opacity: .2; transform: scale(.6); } }
@keyframes rise { from { transform: translateY(14px); opacity: 0; } to { transform: none; opacity: 1; } }
.char { transform-origin: 50% 90%; }
.anim-bob { animation: bob 2.8s ease-in-out infinite; }
.anim-hop { animation: hop 1.6s ease-in-out infinite; }
.anim-bounce { animation: bounce 1.1s ease-out 2, bob 2.8s 2.2s ease-in-out infinite; }
.anim-wave { animation: wave 1.2s ease-in-out 2, bob 2.8s 2.4s ease-in-out infinite; }
.anim-jump { animation: jump .9s ease-out 2, bob 2.8s 1.8s ease-in-out infinite; }
.anim-think { animation: thinky 2.6s ease-in-out infinite; }
.anim-spin { animation: spin 1.3s ease-in-out 1, bob 2.8s 1.3s ease-in-out infinite; }
.anim-shake { animation: shake .8s ease-in-out 2, thinky 2.6s 1.6s ease-in-out infinite; }
.anim-pop { animation: pop .6s ease-out 1, bob 2.8s .6s ease-in-out infinite; }
.anim-peek { animation: peek .8s ease-out 1, bob 2.8s .8s ease-in-out infinite; }
.char .c-spark { transform-box: fill-box; transform-origin: center; animation: twinkle 1.8s ease-in-out infinite; }
.char .c-spark.s2 { animation-delay: .9s; }
.char.mini { width: 64px; }
@media (prefers-reduced-motion: reduce) { .char, .char *, .scene, .scene * { animation: none !important; } }

/* ---------- Story scenes ---------- */
.story-v2 { display: grid; gap: 14px; }
.scene { position: relative; display: grid; grid-template-columns: 170px 1fr 110px; grid-template-areas: "speaker bubble partner"; align-items: end; gap: 14px;
  padding: 22px 18px 16px; border-radius: 22px; overflow: hidden; min-height: 260px; animation: rise .45s ease-out;
  background: linear-gradient(180deg, color-mix(in srgb, var(--tone, var(--sky)) 18%, var(--surface)) 0%, color-mix(in srgb, var(--tone, var(--sky)) 6%, var(--surface)) 72%, color-mix(in srgb, var(--grass) 30%, var(--surface)) 72%); }
.scene.flip { grid-template-columns: 110px 1fr 170px; grid-template-areas: "partner bubble speaker"; }
.scene .speaker { grid-area: speaker; width: 170px; position: relative; z-index: 1; }
.scene .partner { grid-area: partner; width: 100px; opacity: .95; position: relative; z-index: 1; }
.scene .bubble-big { grid-area: bubble; align-self: center; position: relative; z-index: 1; }
.scene-sky { position: absolute; inset: 0; pointer-events: none; }
.scene-sky i { position: absolute; width: 90px; height: 26px; border-radius: 99px; background: color-mix(in srgb, var(--surface) 80%, transparent); animation: drift 18s linear infinite; }
.scene-sky i:nth-child(1) { top: 16px; left: -90px; }
.scene-sky i:nth-child(2) { top: 50px; left: -90px; width: 60px; animation-delay: -7s; animation-duration: 24s; }
.scene-sky i:nth-child(3) { top: 26px; left: -90px; width: 120px; animation-delay: -14s; animation-duration: 30s; }
@keyframes drift { to { transform: translateX(calc(100vw + 200px)); } }
.bubble-big { background: var(--surface); border: 3px solid var(--ink); border-radius: 22px; padding: 16px 18px; display: grid; gap: 6px; box-shadow: 0 5px 0 color-mix(in srgb, var(--ink) 18%, transparent); animation: pop .45s ease-out; }
.bubble-big .who { font-family: var(--f-mono); font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; color: var(--tang); }
.bubble-big h2 { font-size: clamp(1.3rem, 2.6vw, 1.75rem); }
.story-nav { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; }
@media (max-width: 640px) {
  .scene, .scene.flip { grid-template-columns: 1fr 1fr; grid-template-areas: "bubble bubble" "speaker partner"; min-height: 0; }
  .scene .speaker { width: 120px; justify-self: start; } .scene .partner { width: 80px; justify-self: end; }
}

/* ---------- Library ---------- */
.lib-top, .lab-top { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: end; gap: 16px; }
.cast-row { display: flex; gap: 4px; flex-wrap: wrap; }
.cast-row .char { width: 58px; }
.filter-block { display: grid; gap: 8px; }
.filters.small button { min-height: 36px; font-size: .85rem; padding: 0 12px; }
.lcard .lcard-art .char { width: 96px; }
.cast-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 14px; }
@media (max-width: 960px) { .cast-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 480px) { .cast-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.cast-card { background: var(--surface); border: 2px solid var(--line); border-radius: 20px; padding: 14px; display: grid; gap: 4px; justify-items: center; text-align: center; }
.cast-card .char { width: 96px; }
.cast-card p { font-size: .9rem; color: var(--ink-soft); }
.real-box { background: color-mix(in srgb, var(--tone, var(--sky)) 14%, var(--surface)); border-radius: 16px; padding: 12px 16px; display: grid; gap: 2px; max-width: 760px; }
table.prog tr.sum td { background: var(--surface-2); }

/* ---------- Exercises ---------- */
.ex { display: grid; gap: 14px; max-width: 760px; }
.ex-end { grid-template-columns: 120px 1fr; align-items: center; }
.ex-end .bit { width: 120px; height: auto; }
.sort-card { font-family: var(--f-display); font-weight: 700; font-size: clamp(1.3rem, 3vw, 1.8rem); line-height: 1.25; background: var(--surface-2); border: 3px dashed var(--line); border-radius: 20px; padding: 22px; text-align: center; animation: pop .35s ease-out; }
.cat-row { display: flex; flex-wrap: wrap; gap: 10px; }
.cat-btn { flex: 1 1 140px; }
.chart .nn-line { stroke: var(--ink-soft); stroke-width: 2; stroke-dasharray: 4 4; }
.chart .nn-line.best { stroke: var(--teal); stroke-width: 3.5; stroke-dasharray: none; }
.chart .test-pt { fill: var(--surface); stroke-width: 4; }
.chart .test-n { fill: var(--ink); font: 700 11px var(--f-mono); }
.chart .dist { fill: var(--ink-soft); font-size: 10px; }
.chart .vword circle { fill: var(--sky); stroke: var(--surface); stroke-width: 2; }
.chart .vword text { fill: var(--ink); font: 700 13px var(--f-body); }
.chart .vword.target circle { fill: var(--tang); r: 9; }
.chart .vword.picked circle { fill: var(--berry); }
.legend .ring { border: 3px solid var(--ink); background: var(--surface); }
table.prog tr.focus td { background: color-mix(in srgb, var(--sun) 25%, var(--surface)); }
table.prog tr[data-row] { cursor: pointer; }
.tokens { display: flex; flex-wrap: wrap; gap: 6px; }
.tok { display: inline-grid; justify-items: center; padding: 6px 10px 4px; border-radius: 10px; font: 700 1rem var(--f-mono); background: color-mix(in srgb, var(--tone) 22%, var(--surface)); border: 2px solid var(--tone); animation: pop .3s ease-out backwards; }
.tok small { font-size: .65rem; color: var(--ink-soft); font-weight: 500; }
.tok:nth-child(2) { animation-delay: .05s; } .tok:nth-child(3) { animation-delay: .1s; } .tok:nth-child(4) { animation-delay: .15s; } .tok:nth-child(5) { animation-delay: .2s; } .tok:nth-child(n+6) { animation-delay: .25s; }
.vstrip { display: inline-grid; grid-template-columns: repeat(16, 1fr); gap: 2px; width: 100%; max-width: 220px; height: 16px; }
.vstrip i { background: var(--sky); border-radius: 3px; }
.pipeline { margin: 0; padding-left: 1.6em; display: grid; gap: 8px; }
.pipeline li { padding: 10px 14px; border-radius: 12px; background: var(--surface-2); font-weight: 700; animation: rise .25s ease-out; }
.pipeline li.ok { background: color-mix(in srgb, var(--good) 18%, var(--surface)); }
.pipeline li.bad { background: color-mix(in srgb, var(--bad) 14%, var(--surface)); }
.pipeline li.slot { background: none; border: 2px dashed var(--line); color: var(--ink-soft); font-weight: 400; }
.pixgrid { display: grid; gap: 2px; width: min(100%, 340px); justify-self: center; background: var(--line); padding: 2px; border-radius: 10px; }
.px { aspect-ratio: 1; display: grid; place-items: center; font: 700 .8rem var(--f-mono); background: color-mix(in srgb, var(--ink) calc(var(--v) * 100%), var(--surface)); color: color-mix(in srgb, var(--sun) 80%, var(--ink-soft)); border-radius: 2px; transition: box-shadow .2s; }
.px.edge { box-shadow: inset 0 0 0 3px var(--sun); }
.question-bubble { justify-self: start; background: var(--ink); color: var(--bg); font-weight: 700; font-size: 1.15rem; padding: 12px 16px; border-radius: 18px 18px 18px 4px; }
.chunks { display: grid; gap: 8px; }
.chunk { text-align: left; font: 1rem/1.4 var(--f-body); color: var(--ink); background: var(--surface); border: 2px solid var(--line); border-radius: 14px; padding: 12px 14px; cursor: pointer; display: grid; gap: 6px; box-shadow: 0 3px 0 var(--line); }
.chunk:hover:not(:disabled) { border-color: var(--sky); }
.chunk.right { border-color: var(--good); background: color-mix(in srgb, var(--good) 12%, var(--surface)); }
.chunk.wrong { border-color: var(--bad); background: color-mix(in srgb, var(--bad) 10%, var(--surface)); }
.chunk:disabled { cursor: default; }
.chunk-n { font: .72rem var(--f-mono); letter-spacing: .05em; text-transform: uppercase; color: var(--ink-soft); }
.sim { display: grid; grid-template-columns: 1fr 44px; gap: 8px; align-items: center; font: 700 .85rem var(--f-mono); }
table.eval tr.ok td:last-child { color: var(--good); font-weight: 700; }
table.eval tr.bad td { background: color-mix(in srgb, var(--bad) 8%, transparent); }

/* ---------- Lab ---------- */
.lab-mascot { width: 110px; }
.flow { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.flow li { display: flex; align-items: center; gap: 6px; font-weight: 700; padding: 6px 12px 6px 6px; border-radius: 999px; background: var(--surface); border: 2px solid var(--line); }
.flow li span, .stepno { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; background: var(--berry); color: var(--on-accent); font: 800 .85rem var(--f-display); flex: none; }
.stepno { margin-right: 8px; vertical-align: 2px; }
.flow li:not(:last-child)::after { content: "→"; margin-left: 6px; color: var(--ink-soft); }
.flow.vertical { flex-direction: column; align-items: flex-start; }
.flow.vertical li:not(:last-child)::after { content: "↓"; }
.rag-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.rag-grid .wide { grid-column: 1 / -1; }
@media (max-width: 820px) { .rag-grid { grid-template-columns: 1fr; } }
.chips .chip-btn.on { background: var(--berry); color: var(--on-accent); }
.chunk-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; max-height: 360px; overflow-y: auto; }
.chunk-list li, .hits li { display: grid; grid-template-columns: auto 1fr; gap: 4px 10px; align-items: center; padding: 8px 10px; border-radius: 12px; background: var(--surface-2); }
.chunk-list .vstrip, .hits .sim { grid-column: 2; }
.hits { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.hits li { animation: rise .3s ease-out backwards; }
.hits li:nth-child(2) { animation-delay: .08s; } .hits li:nth-child(3) { animation-delay: .16s; }
.hits li.weak { opacity: .55; }
.hits .pill { grid-column: 2; justify-self: start; }
.ask-row { display: flex; gap: 10px; flex-wrap: wrap; }
.ask-row input { flex: 1 1 240px; }
.qinfo { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 16px; margin-top: 12px; }
.qinfo h3 { font-size: 1.05rem; margin-bottom: 8px; }
@media (max-width: 700px) { .qinfo { grid-template-columns: 1fr; } }
.answers { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
@media (max-width: 760px) { .answers { grid-template-columns: 1fr; } }
.answer-card { display: grid; grid-template-columns: 64px 1fr; gap: 12px; align-items: start; padding: 14px; border-radius: 16px; background: color-mix(in srgb, var(--sky) 10%, var(--surface)); border: 2px solid var(--line); min-width: 0; }
.answer-card.real { background: color-mix(in srgb, var(--berry) 10%, var(--surface)); }
.answer-card > div { display: grid; gap: 8px; min-width: 0; }
.prompt-box { margin-top: 12px; }
.prompt-box summary { cursor: pointer; font-weight: 700; }
.prompt-box pre { white-space: pre-wrap; font: .82rem/1.5 var(--f-mono); background: var(--ink); color: var(--bg); padding: 12px 14px; border-radius: 12px; overflow-x: auto; }
.challenges { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.lab-teaser { grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); align-items: center; }
@media (max-width: 760px) { .lab-teaser { grid-template-columns: 1fr; } }

/* Scratch-coloured blocks */
.sb { display: inline-block; font: 700 .88rem/1.2 var(--f-body); color: #fff; padding: 5px 10px; margin: 3px 2px; border-radius: 6px; border-bottom: 3px solid rgba(0, 0, 0, .22); white-space: normal; }
.sb-event { background: #FFBF00; color: #3b2a00; border-radius: 14px 14px 6px 6px; }
.sb-control { background: #FFAB19; color: #3b2400; }
.sb-motion { background: #4C97FF; } .sb-looks { background: #9966FF; } .sb-sound { background: #CF63CF; }
.sb-sensing { background: #5CB1D6; color: #062a3a; } .sb-operators { background: #59C059; color: #0c2e0c; } .sb-variables { background: #FF8C1A; color: #3a1d00; }
.sb-video { background: #0FBD8C; color: #03301f; } .sb-ml { background: #0A6E8A; }
.guide-page { display: grid; gap: 16px; max-width: 900px; }
.guide-head { display: grid; grid-template-columns: 130px 1fr; gap: 18px; align-items: center; }
.guide-head > div { display: grid; gap: 10px; justify-items: start; min-width: 0; }
@media (max-width: 560px) { .guide-head { grid-template-columns: 1fr; } .guide-head .char { width: 100px; } }
.guide-steps { margin: 0; padding-left: 1.4em; display: grid; gap: 12px; }
.guide-steps li { line-height: 1.7; }
.panel.challenge { background: color-mix(in srgb, var(--sun) 18%, var(--surface)); }
.how { display: grid; grid-template-columns: 110px 1fr; gap: 14px; align-items: center; }
@media (max-width: 560px) { .how { grid-template-columns: 1fr; } }
.guide-grid .lcard-art .char { width: 90px; }

/* ---------- Model Studio ---------- */
.type-tiles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
@media (max-width: 720px) { .type-tiles { grid-template-columns: 1fr; } }
.type-tile { display: grid; gap: 6px; justify-items: start; text-align: left; padding: 18px; border-radius: 20px; cursor: pointer; text-decoration: none; color: var(--ink); font: inherit;
  background: color-mix(in srgb, var(--tone) 16%, var(--surface)); border: 2px solid color-mix(in srgb, var(--tone) 50%, var(--line)); box-shadow: 0 4px 0 color-mix(in srgb, var(--tone) 35%, var(--line)); transition: transform .1s; }
.type-tile:hover { transform: translateY(-2px); }
.type-tile svg { width: 56px; height: 56px; }
.type-tile strong { font-family: var(--f-display); font-size: 1.3rem; }
.type-tile span { color: var(--ink-soft); font-size: .95rem; }
.sample-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.studio-steps { margin-bottom: 8px; }
.project { gap: 16px; }
.project-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: end; gap: 12px; }
.project-steps { gap: 8px; }
.project-steps li { padding: 0; border: 0; background: none; }
.project-steps li::after { display: none; }
.project-steps button { display: flex; align-items: center; gap: 8px; font: 700 1rem var(--f-body); color: var(--ink); padding: 8px 16px 8px 8px; min-height: 48px; border-radius: 999px; background: var(--surface); border: 2px solid var(--line); cursor: pointer; }
.project-steps button.on { border-color: var(--tone); background: color-mix(in srgb, var(--tone) 18%, var(--surface)); }
.project-steps button span { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--tone); color: var(--on-accent); font: 800 .9rem var(--f-display); }
.project .stage { display: grid; gap: 18px; }
.train-top { display: grid; gap: 6px; }
.add-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: end; }
.add-row input[type="text"] { flex: 1 1 200px; }
.add-row.nums .field { flex: 1 1 110px; }
.label-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.label-col { display: grid; gap: 10px; align-content: start; padding: 14px; border-radius: 18px; background: color-mix(in srgb, var(--tone) 10%, var(--surface)); border: 2px solid color-mix(in srgb, var(--tone) 45%, var(--line)); min-width: 0; }
.label-col header { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.label-col h3 { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.chip.ok { background: color-mix(in srgb, var(--good) 22%, var(--surface)); color: var(--ink); }
.examples { display: flex; flex-wrap: wrap; gap: 6px; max-height: 260px; overflow-y: auto; }
.ex-chip { display: inline-flex; align-items: center; gap: 4px; padding: 4px 4px 4px 10px; border-radius: 10px; background: var(--surface); border: 1px solid var(--line); font-size: .9rem; max-width: 100%; overflow-wrap: anywhere; }
.ex-chip button, .ex-img button { border: 0; background: none; color: var(--ink-soft); font: 700 1rem var(--f-body); cursor: pointer; width: 26px; height: 26px; border-radius: 8px; flex: none; }
.ex-chip button:hover, .ex-img button:hover { background: color-mix(in srgb, var(--bad) 15%, transparent); color: var(--bad); }
.ex-img { position: relative; width: 64px; height: 64px; }
.ex-img img { width: 64px; height: 64px; border-radius: 10px; border: 2px solid var(--line); background: #fff; }
.ex-img button { position: absolute; top: -6px; right: -6px; background: var(--surface); border: 1px solid var(--line); width: 22px; height: 22px; font-size: .85rem; }
.swatches.small span { width: 32px; height: 32px; }
.modal-card .pad { width: min(320px, 100%); justify-self: center; border-style: solid; background: #fff; }
.cam-box { position: relative; border-radius: 16px; overflow: hidden; background: var(--ink); aspect-ratio: 4 / 3; max-width: 100%; }
.cam-box video { width: 100%; height: 100%; object-fit: cover; transform: scaleX(-1); display: block; }
.cam-box::after { content: ""; position: absolute; inset: 0; margin: auto; height: 100%; aspect-ratio: 1; border: 3px dashed rgba(255, 255, 255, .7); border-radius: 12px; pointer-events: none; }
.cam-flash { position: absolute; inset: 0; background: #fff; opacity: 0; pointer-events: none; }
.cam-flash.go { animation: flash .35s ease-out; }
@keyframes flash { 0% { opacity: .85; } 100% { opacity: 0; } }
.train-panel { display: grid; grid-template-columns: 72px 1fr; gap: 14px; align-items: center; padding: 16px; border-radius: 18px; background: color-mix(in srgb, var(--sun) 16%, var(--surface)); }
.train-panel > div { display: grid; gap: 8px; }
.train-panel .char { width: 72px; }
.stats-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 760px) { .stats-grid { grid-template-columns: 1fr; } }
.learned-row { display: grid; grid-template-columns: 110px 1fr; gap: 10px; align-items: center; padding: 6px 0; border-bottom: 1px solid var(--line); }
.learned-row .tok { font-size: .85rem; }
.avg-imgs { display: flex; flex-wrap: wrap; gap: 14px; }
.avg-imgs figure { margin: 0; display: grid; gap: 4px; justify-items: center; }
.avg-imgs canvas { width: 96px; height: 96px; image-rendering: pixelated; border-radius: 10px; border: 2px solid var(--line); }
.result { display: grid; gap: 10px; margin-top: 12px; animation: rise .3s ease-out; }
.try-thumb { width: 96px; height: 96px; border-radius: 12px; border: 2px solid var(--line); background: #fff; margin-top: 10px; }
.make-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; align-items: start; }
.make-grid .make-scratch { grid-row: span 2; }
@media (max-width: 860px) { .make-grid { grid-template-columns: 1fr; } .make-grid .make-scratch { grid-row: auto; } }
.blocks-preview { display: flex; flex-wrap: wrap; gap: 2px; padding: 10px; border-radius: 12px; background: var(--surface-2); }
.sb.round { border-radius: 999px; }
.ideas { margin: 0; padding-left: 1.2em; display: grid; gap: 6px; }
.chat { display: grid; gap: 8px; align-content: start; min-height: 160px; max-height: 300px; overflow-y: auto; padding: 12px; border-radius: 14px; background: var(--surface-2); }
.msg { max-width: 85%; padding: 8px 12px; border-radius: 14px; display: grid; gap: 2px; animation: rise .25s ease-out; }
.msg.bot { justify-self: start; background: var(--surface); border: 2px solid var(--line); border-bottom-left-radius: 4px; }
.msg.me { justify-self: end; background: var(--sky); color: var(--on-accent); border-bottom-right-radius: 4px; }
.msg small { font: .7rem var(--f-mono); color: var(--ink-soft); }
.bot-replies { display: grid; gap: 8px; }
@media (max-width: 560px) { .lab-mascot { display: none; } }

/* ---------- Beta, feedback, privacy ---------- */
.fb-fab { position: fixed; z-index: 30; right: calc(16px + env(safe-area-inset-right, 0px)); bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  font: 700 .95rem var(--f-body); color: var(--on-accent); background: var(--berry); border: 0; border-radius: 999px; padding: 12px 18px; min-height: 46px; cursor: pointer;
  box-shadow: 0 4px 0 color-mix(in srgb, var(--berry) 60%, var(--ink)); }
.fb-fab:hover { transform: translateY(-1px); }
.beta-card { grid-template-columns: 72px 1fr; align-items: center; max-width: 760px; }
.beta-card .char { width: 72px; }
.beta-card > div { display: grid; gap: 8px; }
.foot-links { display: flex; flex-wrap: wrap; gap: 6px 16px; }
@media print { .fb-fab { display: none; } }