/* Sharpen: calm, readable, one idea per screen. Light and dark via tokens. */
:root {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --panel2: #eef1f7;
  --line: #dde2ec;
  --text: #1b2130;
  --muted: #5d6779;
  --accent-default: #4f8cff;
  --good: #1f9d55;
  --good-bg: #e6f6ec;
  --bad: #d64545;
  --bad-bg: #fdecec;
  --shown-bg: #eef3ff;
  --shadow: 0 1px 2px rgba(20, 30, 50, .06), 0 4px 16px rgba(20, 30, 50, .06);
  --radius: 14px;
  --c1: #3b7ddd;
  --c2: #e8833a;
  --c3: #2fa37a;
  --c4: #c34fa0;
  --c5: #d9b335;
  --c6: #7a5fd6;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1420;
    --panel: #171d2b;
    --panel2: #1f2738;
    --line: #2b3448;
    --text: #e8ecf4;
    --muted: #97a1b5;
    --good: #4cc77f;
    --good-bg: #16301f;
    --bad: #ff7b72;
    --bad-bg: #3a1d1d;
    --shown-bg: #1a2640;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 16px rgba(0, 0, 0, .25);
    --c1: #6aa5ff;
    --c2: #ff9f5a;
    --c3: #4fd1a0;
    --c4: #e57ac6;
    --c5: #f0cf5a;
    --c6: #a38cff;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f1420;
  --panel: #171d2b;
  --panel2: #1f2738;
  --line: #2b3448;
  --text: #e8ecf4;
  --muted: #97a1b5;
  --good: #4cc77f;
  --good-bg: #16301f;
  --bad: #ff7b72;
  --bad-bg: #3a1d1d;
  --shown-bg: #1a2640;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 16px rgba(0, 0, 0, .25);
  --c1: #6aa5ff;
  --c2: #ff9f5a;
  --c3: #4fd1a0;
  --c4: #e57ac6;
  --c5: #f0cf5a;
  --c6: #a38cff;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; }
h1 { font-size: 1.7rem; }
h2 { font-size: 1.3rem; }
h3 { font-size: 1.1rem; }
a { color: inherit; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
code { background: var(--panel2); padding: 0 .3em; border-radius: 5px; }

button, .btn {
  font: inherit;
  border: 0;
  border-radius: 11px;
  padding: .7em 1.3em;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4em;
  transition: transform .06s, background .15s, opacity .15s;
}
button:active:not([disabled]) { transform: translateY(1px); }
button[disabled] { opacity: .45; cursor: default; }
.primary { background: var(--accent, var(--accent-default)); color: #fff; font-weight: 600; }
.ghost { background: var(--panel2); color: var(--text); border: 1px solid var(--line); }
.icon-btn { background: transparent; color: var(--muted); padding: .35em .55em; border-radius: 8px; }
.icon-btn:hover:not([disabled]) { background: var(--panel2); color: var(--text); }
:focus-visible { outline: 3px solid var(--accent, var(--accent-default)); outline-offset: 2px; }

/* ---------------------------------------------------------------- top bar */
.top {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px max(16px, calc((100vw - 980px) / 2));
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 800; font-size: 1.15rem; text-decoration: none; display: flex; align-items: center; gap: .4em; letter-spacing: .2px; }
.brand-mark { color: var(--accent-default); }
.top-stats { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
.chip { display: inline-flex; align-items: center; gap: 2px; background: var(--panel); border: 1px solid var(--line); border-radius: 999px; padding: .15em .65em; font-size: .9rem; font-weight: 600; white-space: nowrap; }
.chip.link { text-decoration: none; }
.ring { width: 16px; height: 16px; }
.ring-bg { fill: none; stroke: var(--line); stroke-width: 3; }
.ring-fg { fill: none; stroke: var(--good); stroke-width: 3; stroke-linecap: round; }

/* ---------------------------------------------------------------- pages */
.page { max-width: 980px; margin: 0 auto; padding: 24px 16px 64px; }
.section-title { margin-top: 32px; }
.back { display: inline-block; margin-bottom: 16px; text-decoration: none; color: var(--muted); }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }
.footnote { margin-top: 32px; text-align: center; font-size: .9rem; }

.today { display: grid; gap: 14px; grid-template-columns: 1fr 1fr; }
.hero, .practice-card { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.hero { border-top: 4px solid var(--accent); }
.practice-card { border-top: 4px solid var(--good); }
.hero-icon { font-size: 2.2rem; }
.hero-text { flex: 1 1 200px; }
.hero-text h2 { margin: .1em 0 .2em; }
.hero-text p { margin: 0; }
.eyebrow { text-transform: uppercase; letter-spacing: .08em; font-size: .75rem; font-weight: 700; color: var(--muted); }
.hero .primary { --accent: inherit; }

.courses { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.course { text-decoration: none; display: flex; flex-direction: column; gap: 6px; transition: transform .12s, box-shadow .12s; border-top: 4px solid var(--accent); }
.course:hover { transform: translateY(-2px); }
.course h3 { margin: 4px 0 0; }
.course p { margin: 0; flex: 1; }
.course-icon { font-size: 1.8rem; }
.course-icon.big { font-size: 3rem; }
.progress { height: 8px; background: var(--panel2); border-radius: 99px; overflow: hidden; margin-top: 8px; }
.progress-fill { height: 100%; background: var(--accent, var(--accent-default)); border-radius: 99px; }

.course-head { display: flex; gap: 18px; align-items: center; margin-bottom: 24px; }
.course-head > div:last-child { flex: 1; }
.path { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.path-item a { display: flex; align-items: center; gap: 14px; text-decoration: none; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.path-item a:hover { border-color: var(--accent); }
.path-dot { width: 34px; height: 34px; flex: none; border-radius: 50%; display: grid; place-items: center; font-weight: 700; background: var(--panel2); color: var(--muted); }
.path-item.done .path-dot { background: var(--accent); color: #fff; }
.path-item.next a { border: 2px solid var(--accent); }
.path-item.next .path-dot { background: color-mix(in srgb, var(--accent) 20%, transparent); color: var(--accent); }
.path-text { flex: 1; display: flex; flex-direction: column; }
.path-go { color: var(--accent); font-weight: 600; }

.settings { display: grid; gap: 14px; margin-bottom: 14px; }
.settings label { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.settings select { font: inherit; padding: .4em .6em; border-radius: 9px; border: 1px solid var(--line); background: var(--panel2); color: var(--text); }
.settings.danger { margin-top: 24px; }

/* ---------------------------------------------------------------- player */
.player { min-height: 100vh; display: flex; flex-direction: column; max-width: 760px; margin: 0 auto; }
.player-head { display: flex; align-items: center; gap: 12px; padding: 14px 16px; position: sticky; top: 0; background: var(--bg); z-index: 3; }
.bar { flex: 1; height: 10px; background: var(--panel2); border-radius: 99px; overflow: hidden; }
.bar-fill { height: 100%; width: 0; border-radius: 99px; transition: width .3s ease; }
.player-title { font-size: .85rem; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 40%; }
.step { flex: 1; padding: 8px 20px 24px; animation: rise .25s ease; }
@keyframes rise { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.step .md { font-size: 1.12rem; }
.md p { margin: 0 0 .8em; }
.md ul { margin: 0 0 .8em; padding-left: 1.3em; }
.step-foot { position: sticky; bottom: 0; display: flex; justify-content: flex-end; gap: 10px; padding: 14px 20px calc(14px + env(safe-area-inset-bottom)); background: var(--bg); border-top: 1px solid var(--line); }
.step-foot .primary { min-width: 140px; }

.options { display: grid; gap: 10px; margin-top: 12px; }
.option { justify-content: flex-start; text-align: left; background: var(--panel); color: var(--text); border: 2px solid var(--line); padding: .8em 1em; }
.option .md p { margin: 0; font-size: 1.02rem; }
.option:hover { border-color: var(--accent-default); }
.option.picked { border-color: var(--accent-default); background: color-mix(in srgb, var(--accent-default) 10%, var(--panel)); }
.option.right { border-color: var(--good); background: var(--good-bg); }
.option.wrong { border-color: var(--bad); background: var(--bad-bg); }
.locked .option { pointer-events: none; }

.num-row { display: flex; align-items: center; gap: 10px; margin-top: 12px; }
.num { font: inherit; font-size: 1.25rem; padding: .5em .7em; border-radius: 11px; border: 2px solid var(--line); background: var(--panel); color: var(--text); width: min(260px, 100%); }
.num:focus { border-color: var(--accent-default); outline: none; }
.unit { color: var(--muted); }

.est-box { margin-top: 18px; }
.est-value { font-size: 2rem; font-weight: 700; text-align: center; }
.est { width: 100%; accent-color: var(--accent-default); height: 28px; }
.est-ends { display: flex; justify-content: space-between; color: var(--muted); font-size: .85rem; }

.order { padding: 0; margin: 12px 0 0; list-style: none; counter-reset: o; display: grid; gap: 8px; }
.order li { counter-increment: o; display: flex; align-items: center; gap: 10px; background: var(--panel); border: 1px solid var(--line); border-radius: 11px; padding: .4em .5em .4em .8em; }
.order li::before { content: counter(o); font-weight: 700; color: var(--muted); width: 1.2em; }
.order-text { flex: 1; }
.order-text .md p { margin: 0; }
.order-btns { display: flex; flex-direction: column; }
.order-btns .icon-btn { padding: 0 .5em; line-height: 1.3; }

.feedback { margin-top: 18px; border-radius: 12px; padding: 14px 16px; animation: rise .2s ease; }
.feedback .md { font-size: 1rem; }
.feedback .md p:last-child { margin-bottom: 0; }
.feedback.good { background: var(--good-bg); border-left: 5px solid var(--good); }
.feedback.bad { background: var(--bad-bg); border-left: 5px solid var(--bad); }
.feedback.shown { background: var(--shown-bg); border-left: 5px solid var(--accent-default); }
.fb-head { font-weight: 800; margin-bottom: .3em; }
.feedback.good .fb-head { color: var(--good); }
.feedback.bad .fb-head { color: var(--bad); }
.hint { margin-top: 14px; padding: 10px 14px; border-radius: 10px; background: var(--panel2); border: 1px dashed var(--line); }
.hint .md { font-size: 1rem; }
.hint .md p { margin: 0; }

/* ---------------------------------------------------------------- summary */
.summary { text-align: center; padding-top: 48px; }
.summary-badge { font-size: 4rem; }
.summary-stats { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; margin: 20px 0; }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 20px; min-width: 110px; }
.stat-v { font-size: 1.6rem; font-weight: 800; color: var(--accent, var(--accent-default)); }
.stat-l { color: var(--muted); font-size: .85rem; }
.summary-btns { display: flex; gap: 12px; justify-content: center; margin-top: 18px; }

/* ---------------------------------------------------------------- widgets */
.widget { margin: 14px 0; padding: 14px; border-radius: 12px; background: var(--panel); border: 1px solid var(--line); }
.w-btns { display: flex; flex-wrap: wrap; gap: 8px; margin: 6px 0; }
.w-btns .ghost { padding: .45em .9em; font-size: .95rem; }
.w-stats { display: flex; gap: 16px; flex-wrap: wrap; color: var(--muted); font-size: .95rem; margin-top: 8px; }
.w-stats strong { color: var(--text); }
.w-msg { margin: 10px 0; }
.chart { width: 100%; height: auto; background: var(--panel2); border-radius: 8px; margin-top: 8px; }
.chart .line { fill: none; stroke: var(--accent-default); stroke-width: 2; }
.chart .axis-mid { stroke: var(--muted); stroke-dasharray: 4 4; }
.chart .axis-label { fill: var(--muted); font-size: 10px; }
.coin-row { display: flex; gap: 4px; flex-wrap: wrap; min-height: 30px; margin-top: 6px; }
.coin { width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; font-weight: 800; font-size: .8rem; }
.coin.heads { background: #f2c94c; color: #5b4300; }
.coin.tails { background: #a7b3c6; color: #2b3445; }

.dice-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; max-width: 420px; margin: 6px auto 0; }
.dg-head, .dg-corner { display: grid; place-items: center; font-weight: 700; color: var(--muted); font-size: .9rem; }
.dg-cell { padding: 0; aspect-ratio: 1; border-radius: 7px; background: var(--panel2); color: var(--muted); font-size: .8rem; border: 1px solid var(--line); }
.dg-cell[disabled] { opacity: 1; }
.dg-cell.on { background: var(--accent-default); color: #fff; border-color: transparent; }
.dg-legend { text-align: center; }
.w-dice .w-stats { justify-content: center; }

.doors { display: flex; gap: 12px; justify-content: center; margin: 6px 0; }
.door { width: 84px; height: 110px; font-size: 1.8rem; font-weight: 800; background: #8a5a3c; color: #fff; border-radius: 10px 10px 4px 4px; border: 3px solid transparent; }
.door.picked { border-color: var(--accent-default); }
.door.open { background: var(--panel2); color: var(--text); }
.door[disabled] { opacity: 1; }
.w-monty .w-msg { text-align: center; }
.w-monty .w-btns { justify-content: center; }

.dots { width: 100%; max-width: 420px; display: block; margin: 0 auto; }
.legend { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; font-size: .9rem; color: var(--muted); margin-top: 8px; }
.legend i { display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin-right: 5px; vertical-align: -1px; }
.split { display: flex; height: 26px; border-radius: 8px; overflow: hidden; }

/* ---------------------------------------------------------------- new exercise types */
.option.multi { display: flex; align-items: center; gap: 12px; }
.option.multi .box { flex: none; width: 20px; height: 20px; border-radius: 6px; border: 2px solid var(--line); display: grid; place-items: center; font-size: .8rem; color: #fff; }
.option.multi.picked .box { background: var(--accent-default); border-color: var(--accent-default); }
.option.multi.picked .box::after { content: '✓'; }
.option.missed { border-style: dashed; }

.match { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 10px; }
.match-col { display: grid; gap: 8px; align-content: start; }
.match-head { font-weight: 700; color: var(--muted); font-size: .85rem; text-transform: uppercase; letter-spacing: .06em; }
.match-item { --mc: transparent; justify-content: flex-start; text-align: left; background: var(--panel); color: var(--text); border: 2px solid var(--line); border-left: 8px solid var(--mc); padding: .6em .8em; min-height: 52px; }
.match-item .md p { margin: 0; font-size: 1rem; }
.match-item.sel { border-color: var(--accent-default); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-default) 25%, transparent); }
.match-item.linked { border-left-color: var(--mc); }
.match-item.right { border-color: var(--good); border-left-color: var(--good); background: var(--good-bg); }
.match-item.wrong { border-color: var(--bad); border-left-color: var(--bad); background: var(--bad-bg); }
.locked .match-item, .locked .chip-item, .locked .slot, .locked .tile, .locked .bin { pointer-events: none; }

.tray { display: flex; flex-wrap: wrap; gap: 8px; min-height: 48px; padding: 10px; margin: 10px 0; border-radius: 12px; border: 2px dashed var(--line); align-items: center; }
.chip-item { background: var(--panel); color: var(--text); border: 2px solid var(--line); padding: .4em .8em; border-radius: 10px; font-size: .95rem; }
.chip-item .md p { margin: 0; }
.chip-item.sel { border-color: var(--accent-default); background: color-mix(in srgb, var(--accent-default) 12%, var(--panel)); }
.chip-item.right { border-color: var(--good); background: var(--good-bg); }
.chip-item.wrong { border-color: var(--bad); background: var(--bad-bg); }
.bins { display: grid; gap: 10px; }
.bin { background: var(--panel2); border: 2px solid var(--line); border-radius: 12px; padding: 10px; min-height: 110px; cursor: default; }
.bin.armed { cursor: pointer; border-color: color-mix(in srgb, var(--accent-default) 45%, var(--line)); }
.bin.armed:hover { background: color-mix(in srgb, var(--accent-default) 8%, var(--panel2)); }
.bin-head { font-weight: 700; margin-bottom: 8px; }
.bin-items { display: flex; flex-wrap: wrap; gap: 6px; }

.fill-text { font-size: 1.15rem; line-height: 2.3; margin: 10px 0; }
.fill-code { line-height: 2; }
.slot { font: inherit; min-width: 3.2em; padding: .05em .5em; margin: 0 .15em; border-radius: 8px; background: var(--panel2); color: var(--muted); border: 2px dashed var(--line); vertical-align: baseline; line-height: 1.4; }
.slot.filled { color: var(--text); border-style: solid; }
.slot.active { border-color: var(--accent-default); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-default) 25%, transparent); }
.slot.right { border-color: var(--good); background: var(--good-bg); }
.slot.wrong { border-color: var(--bad); background: var(--bad-bg); }
.bank { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.tile { background: var(--panel); color: var(--text); border: 2px solid var(--line); padding: .4em .9em; border-radius: 10px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .95rem; }
.tile.picked { border-color: var(--accent-default); }

/* ---------------------------------------------------------------- plots and charts */
.plot-wrap { width: 100%; overflow-x: auto; }
.plot { width: 100%; height: auto; display: block; margin: 6px auto; user-select: none; -webkit-user-select: none; touch-action: none; }
.plot .gridline { stroke: var(--line); stroke-width: 1; }
.plot .axis { stroke: var(--muted); stroke-width: 1.5; }
.plot .tick { fill: var(--muted); font-size: 12px; }
.plot .axis-label { fill: var(--muted); font-size: 12px; font-style: italic; }
.plot .plot-label { font-size: 13px; font-weight: 700; paint-order: stroke; stroke: var(--panel); stroke-width: 3px; }
.plot.pickable { cursor: crosshair; background: var(--panel2); border-radius: 10px; }
.marker circle { fill: color-mix(in srgb, var(--accent-default) 30%, transparent); stroke: var(--accent-default); stroke-width: 2.5; }
.marker .marker-dot { fill: var(--accent-default); stroke: none; }
.marker.right circle { stroke: var(--good); }
.readout { text-align: center; font-variant-numeric: tabular-nums; color: var(--muted); margin: 6px 0; font-weight: 600; }
.chart-title { font-weight: 700; margin-bottom: 8px; }
.barchart { display: grid; gap: 8px; }
.bc-row { display: grid; grid-template-columns: minmax(70px, 30%) 1fr auto; gap: 10px; align-items: center; font-size: .95rem; }
.bc-label { text-align: right; color: var(--muted); }
.bc-track { height: 20px; background: var(--panel2); border-radius: 6px; overflow: hidden; }
.bc-fill { display: block; height: 100%; border-radius: 6px; transition: width .3s; }
.bc-value { font-weight: 700; font-variant-numeric: tabular-nums; min-width: 3em; }
.stackbar .sb-bar { display: flex; height: 30px; border-radius: 8px; overflow: hidden; }
.sb-part { height: 100%; transition: width .3s; }
.donut-wrap { display: flex; align-items: center; gap: 20px; justify-content: center; flex-wrap: wrap; }
.donut { width: 150px; height: 150px; }
.donut-center { fill: var(--text); font-size: 18px; font-weight: 800; }
.legend.col { flex-direction: column; align-items: flex-start; }
.table-wrap { overflow-x: auto; }
table.data { border-collapse: collapse; margin: 6px auto; font-variant-numeric: tabular-nums; font-size: .95rem; }
table.data th, table.data td { padding: .35em .8em; border-bottom: 1px solid var(--line); text-align: right; }
table.data th:first-child, table.data td:first-child { text-align: left; }
table.data th { color: var(--muted); font-weight: 700; }
table.data tr.hl td { background: color-mix(in srgb, var(--c2) 18%, transparent); }
table.data caption { color: var(--muted); font-size: .85rem; margin-bottom: 4px; }
.icon-array { display: grid; gap: 3px; max-width: 420px; margin: 6px auto; }
.ia-dot { aspect-ratio: 1; border-radius: 50%; display: grid; place-items: center; font-size: .6rem; }

/* ---------------------------------------------------------------- explorers and steppers */
.explorer .sliders { display: grid; gap: 6px; margin-top: 8px; }
.slider-row { display: grid; grid-template-columns: minmax(70px, auto) 1fr 4.5em; gap: 10px; align-items: center; }
.slider-row input { width: 100%; accent-color: var(--accent-default); }
.slider-name { color: var(--muted); font-weight: 600; font-size: .95rem; }
.slider-val { font-variant-numeric: tabular-nums; font-weight: 700; text-align: right; }
.goal-ok { margin-top: 8px; color: var(--good); font-weight: 700; text-align: center; }
.stepper-ctl { display: flex; gap: 8px; align-items: center; justify-content: center; margin-top: 8px; flex-wrap: wrap; }
.small-btn { padding: .35em .8em; font-size: .9rem; }
.stepper-cap { text-align: center; min-height: 1.4em; margin-top: 6px; }

/* ---------------------------------------------------------------- code */
pre.code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .92rem; background: var(--panel2); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; margin: 8px 0; overflow-x: auto; white-space: pre; }
pre.code .cl { display: block; padding: 0 4px; border-radius: 4px; }
pre.code .cl.active { background: color-mix(in srgb, var(--c5) 35%, transparent); }
pre.code .cl.marked { background: color-mix(in srgb, var(--c1) 18%, transparent); }
pre.code .ln { display: inline-block; width: 2em; color: var(--muted); opacity: .6; user-select: none; }
.tk-kw { color: var(--c4); font-weight: 700; }
.tk-str { color: var(--c3); }
.tk-num { color: var(--c2); }
.tk-com { color: var(--muted); font-style: italic; }
.trace { display: grid; grid-template-columns: 3fr 2fr; gap: 12px; align-items: start; }
.trace-head { font-weight: 700; color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; margin: 8px 0 4px; }
table.vars { border-collapse: collapse; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .9rem; }
table.vars td { padding: .15em .6em; border-bottom: 1px solid var(--line); }
table.vars tr.changed td { background: color-mix(in srgb, var(--c5) 35%, transparent); }
pre.trace-out { margin: 0; background: #11151f; color: #d7e0ee; padding: 8px 10px; border-radius: 8px; min-height: 2.2em; font-size: .9rem; white-space: pre-wrap; }
.plot .ab { fill: var(--c1); }
.plot .ab.hi { fill: var(--c2); }
.plot .ab.done { fill: var(--c3); }
.cells { display: flex; gap: 4px; flex-wrap: wrap; justify-content: center; margin: 8px 0; }
.cell { width: 46px; display: grid; justify-items: center; }
.cell-v { width: 46px; height: 46px; display: grid; place-items: center; border: 2px solid var(--line); border-radius: 8px; background: var(--panel); font-weight: 700; font-variant-numeric: tabular-nums; }
.cell.hi .cell-v { border-color: var(--c2); background: color-mix(in srgb, var(--c2) 22%, var(--panel)); }
.cell.dim .cell-v { opacity: .35; }
.cell-i { font-size: .75rem; color: var(--muted); }
.cell-p { font-size: .75rem; font-weight: 700; color: var(--c4); min-height: 1.1em; }
.net-wrap { max-width: 560px; margin: 0 auto; }
.net { width: 100%; height: auto; display: block; }
.net-edge { stroke: var(--muted); stroke-width: .7; opacity: .6; }
.net-edge.hi { stroke: var(--c2); stroke-width: 1.5; opacity: 1; }
.net-arrow { fill: var(--muted); }
.net-wbg { fill: var(--panel); stroke: var(--line); stroke-width: .3; }
.net-w { font-size: 3.6px; fill: var(--text); font-weight: 700; }
.net-node circle { fill: var(--panel); stroke: var(--c1); stroke-width: .9; }
.net-node text { font-size: 4px; font-weight: 700; fill: var(--text); pointer-events: none; }
.net-node .net-extra { font-size: 3.4px; fill: var(--c4); }
.net-node.hi circle { fill: var(--c1); }
.net-node.hi text:not(.net-extra) { fill: #fff; }
.net-node.dim { opacity: .35; }
.net-node.clickable { cursor: pointer; }
.net-node.clickable:hover circle { stroke-width: 1.6; }
.cellgrid { display: grid; gap: 2px; justify-content: center; margin: 8px auto; }
.gc { background: var(--panel2); border-radius: 4px; display: grid; place-items: center; font-size: .8rem; font-weight: 700; }
.gc.clickable { cursor: pointer; }
.gc.clickable:hover { outline: 2px solid var(--accent-default); }

/* ---------------------------------------------------------------- categories */
.cat-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin: 4px 0 16px; }
.cat-tab { background: var(--panel); color: var(--text); border: 1px solid var(--line); border-radius: 999px; padding: .35em .9em; font-size: .92rem; font-weight: 600; }
.cat-tab.on { background: var(--text); color: var(--bg); border-color: var(--text); }
.cat-head { display: flex; align-items: baseline; gap: 10px; margin: 26px 0 10px; }
.cat-head h2 { margin: 0; font-size: 1.25rem; }

/* ---------------------------------------------------------------- account */
.account { display: grid; gap: 12px; max-width: 440px; }
.account .num.text { width: 100%; font-size: 1.05rem; }
.account-btns { display: flex; gap: 10px; flex-wrap: wrap; }
.form-error { color: var(--bad); margin: 0; font-weight: 600; }
.sync-line { font-weight: 600; margin: 0; }
.acct-name { display: inline-block; white-space: nowrap; max-width: 120px; overflow: hidden; text-overflow: ellipsis; vertical-align: bottom; margin-left: 4px; }
.acct-icon { font-size: .85em; }
.sync-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); margin-right: 5px; display: inline-block; }
.account-chip[data-status="synced"] .sync-dot { background: var(--good); }
.account-chip[data-status="syncing"] .sync-dot { background: var(--c5); }
.account-chip[data-status="offline"] .sync-dot, .account-chip[data-status="error"] .sync-dot { background: var(--bad); }

/* ---------------------------------------------------------------- small screens */
@media (max-width: 420px) {
  .brand-text { display: none; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .today { grid-template-columns: 1fr; }
  .top { padding: 8px 12px; }
  .brand { font-size: 1rem; }
  .chip { font-size: .8rem; padding: .1em .45em; }
  .top-stats { gap: 4px; }
  .step { padding: 4px 14px 20px; }
  .step-foot { padding: 12px 14px calc(12px + env(safe-area-inset-bottom)); }
  .step-foot .primary { flex: 1; }
  .player-title { display: none; }
  .account-chip .acct-name { display: none; }
  .door { width: 72px; height: 96px; }
  .trace { grid-template-columns: 1fr; }
  .match { gap: 8px; }
  .match-item { padding: .5em .6em; }
  .bins { grid-template-columns: 1fr !important; }
  .bc-row { grid-template-columns: minmax(60px, 32%) 1fr auto; }
}