/* ============ Tokens ============ */
:root {
  --bg: #f6f4ef;
  --surface: #ffffff;
  --surface-2: #faf8f3;
  --ink: #1d2433;
  --muted: #5d6577;
  --line: #e3ded3;
  --accent: #3b5bdb;
  --accent-ink: #ffffff;
  --accent-soft: #e7ecff;
  --hl: #fff3bf;
  --active: #ffd43b;
  --good: #2b8a3e;
  --good-soft: #e6f6ea;
  --bad: #e03131;
  --bad-soft: #ffe8e8;
  --warn-soft: #fff4e0;
  --cell-bg: #ffffff;
  --cell-line: #3d4454;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(20, 24, 40, .06), 0 6px 20px rgba(20, 24, 40, .06);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14161c;
    --surface: #1d2029;
    --surface-2: #232733;
    --ink: #e9ecf3;
    --muted: #9aa3b5;
    --line: #2e3340;
    --accent: #7c94ff;
    --accent-ink: #0d1020;
    --accent-soft: #252c47;
    --hl: #3a3418;
    --active: #8a6d00;
    --good: #69db7c;
    --good-soft: #1d3324;
    --bad: #ff8787;
    --bad-soft: #3b1f22;
    --warn-soft: #3a2e17;
    --cell-bg: #232733;
    --cell-line: #8b93a7;
    --shadow: none;
    color-scheme: dark;
  }
}

/* ============ Base ============ */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.2; letter-spacing: -.01em; }
h1 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); margin: 0 0 8px; }
h2 { font-size: 1.35rem; margin: 0; }
h3 { font-size: 1rem; margin: 0 0 8px; }
code { background: var(--surface-2); border: 1px solid var(--line); padding: 1px 5px; border-radius: 5px; font-size: .88em; }
hr { border: 0; border-top: 1px solid var(--line); margin: 22px 0; }
.muted { color: var(--muted); }
.small { font-size: .86rem; }
[hidden] { display: none !important; }
.eyebrow { text-transform: uppercase; letter-spacing: .08em; font-size: .78rem; font-weight: 700; color: var(--accent); margin: 0 0 6px; }
.lede { color: var(--muted); font-size: 1.05rem; margin: 4px 0 18px; max-width: 60ch; }

/* ============ Header / footer ============ */
.site-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 24px;
  max-width: 1240px;
  margin: 0 auto;
}
.brand { font-weight: 800; font-size: 1.25rem; color: var(--ink); text-decoration: none; white-space: nowrap; }
.logo { margin-right: 2px; }
.main-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; flex-wrap: wrap; }
.main-nav > a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  padding: 7px 12px;
  border-radius: 8px;
}
.main-nav > a:hover { color: var(--ink); background: var(--surface); }
.main-nav > a.active { color: var(--ink); background: var(--surface); box-shadow: var(--shadow); }
.auth-slot { margin-left: 8px; }
.nav-toggle { display: none; margin-left: auto; background: none; border: 1px solid var(--line); border-radius: 8px; padding: 4px 10px; font-size: 1.2rem; cursor: pointer; }

.site-footer { text-align: center; color: var(--muted); font-size: .88rem; padding: 40px 16px 48px; }
.footer-links { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; margin-bottom: 8px; }
.footer-links a { color: var(--muted); }

/* ============ Layout ============ */
.page { max-width: 1240px; margin: 0 auto; padding: 8px 24px 0; }
.layout {
  display: grid;
  grid-template-columns: 380px minmax(0, 1fr);
  gap: 20px;
  max-width: 1240px;
  margin: 0 auto;
  padding: 8px 24px 0;
  align-items: start;
}
.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  min-width: 0;
  margin-bottom: 20px;
}
.panel.narrow { max-width: 520px; margin-left: auto; margin-right: auto; }
.center { text-align: center; }
.center .lede { margin-left: auto; margin-right: auto; }
.section { max-width: 1240px; margin: 48px auto 0; padding: 0 24px; }
.page .section { padding: 0; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.section-head p { margin: 0; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.stack { display: grid; gap: 10px; }
.center-row { justify-content: center; }

/* ============ Buttons & form ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 8px 14px;
  border-radius: 9px;
  cursor: pointer;
  font-weight: 600;
  font-size: .92rem;
  text-decoration: none;
  color: var(--ink);
  white-space: nowrap;
}
.btn:hover { border-color: var(--muted); }
.btn:disabled { opacity: .6; cursor: progress; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; }
.btn.big { padding: 12px 20px; font-size: 1rem; border-radius: 11px; }
.btn.small { padding: 5px 10px; font-size: .84rem; }

.field { display: block; margin-bottom: 14px; }
.field-label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 4px; }
.field-hint { display: block; color: var(--muted); font-size: .82rem; margin: 0 0 6px; }
.label-row { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 4px; }
.label-row .field-label { margin: 0; }
input[type="text"], input[type="email"], input[type="password"], input[type="search"], input[type="number"], input[type="date"], textarea, select {
  width: 100%;
  background: var(--cell-bg);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 9px 11px;
}
select { cursor: pointer; }
.small-select { width: auto; padding: 4px 8px; font-size: .84rem; }
.small-input { width: 220px; max-width: 100%; padding: 6px 10px; }
textarea { resize: vertical; font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: .86rem; line-height: 1.55; }
input:focus-visible, textarea:focus-visible, select:focus-visible, button:focus-visible, a:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.inline-field { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; font-size: .9rem; }
.inline-field select { width: auto; }
.check-label { display: inline-flex; align-items: center; gap: 6px; font-size: .9rem; cursor: pointer; }

.type-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 4px;
  margin-bottom: 16px;
  gap: 2px;
}
.type-tabs.four { grid-template-columns: repeat(4, 1fr); }
.tab {
  border: 0;
  background: transparent;
  padding: 8px 6px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  font-size: .9rem;
  color: var(--muted);
}
.tab.active { background: var(--surface); color: var(--ink); box-shadow: var(--shadow); }

.message { font-size: .88rem; margin: 12px 0; padding: 0; border-radius: 9px; }
.message:empty { display: none; }
.message.warn { background: var(--warn-soft); padding: 9px 12px; }
.message.error { background: var(--bad-soft); color: var(--bad); padding: 9px 12px; }

/* ============ Home ============ */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
  gap: 40px;
  align-items: center;
  max-width: 1240px;
  margin: 0 auto;
  padding: 40px 24px 8px;
}
.hero h1 { font-size: clamp(2rem, 5vw, 3.4rem); }
.hero .btn.big { margin-top: 4px; }
.hero-art { display: flex; justify-content: center; }
.mini-ws {
  display: grid;
  gap: 4px;
  width: min(360px, 100%);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
  box-shadow: var(--shadow);
  transform: rotate(-3deg);
}
.mini-ws span {
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-family: ui-monospace, Consolas, monospace;
  font-size: clamp(.9rem, 2.4vw, 1.25rem);
  color: var(--muted);
  border-radius: 8px;
}
.mini-ws span.hit { background: var(--active); color: #1d2433; animation: pop .5s ease both; }
@keyframes pop { from { transform: scale(.6); opacity: .2; } to { transform: scale(1); opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .mini-ws span.hit { animation: none; } }

.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.game-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: var(--ink);
  text-decoration: none;
  transition: transform .15s, border-color .15s;
}
.game-card:hover { transform: translateY(-2px); border-color: var(--accent); }
.game-card b { font-size: 1.1rem; }
.game-card .muted { font-size: .92rem; }
.game-emoji { font-size: 2rem; line-height: 1; }
.card-status { margin-top: auto; padding-top: 8px; font-weight: 700; color: var(--accent); }
.daily-card.done { background: var(--good-soft); border-color: transparent; }
.daily-card.done .card-status { color: var(--good); }

.pack-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.pack-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--ink);
  text-decoration: none;
}
.pack-card:hover { border-color: var(--accent); }
.pack-card small { display: block; color: var(--muted); }
.pack-emoji { font-size: 1.6rem; }

.teacher-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  background: var(--accent-soft);
  border-radius: 22px;
  padding: 36px;
  max-width: 1192px;
}
.teacher-band h2 { font-size: clamp(1.4rem, 3vw, 2rem); margin-bottom: 8px; }
.feature-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.feature-list li { background: var(--surface); border-radius: 12px; padding: 12px 14px; }
.feature-list b { display: block; }
.feature-list span { color: var(--muted); font-size: .92rem; }

/* ============ Player ============ */
.controls { padding: 16px; }
.controls .type-tabs { margin-bottom: 12px; }
.control-row { display: flex; gap: 16px; flex-wrap: wrap; }
.viewer-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.viewer-head h2 { font-size: 1.45rem; overflow-wrap: anywhere; }
.timer { font-variant-numeric: tabular-nums; color: var(--muted); font-weight: 700; }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.done {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  background: var(--good-soft);
  color: var(--good);
  font-weight: 700;
  padding: 10px 14px;
  border-radius: 11px;
  margin-bottom: 14px;
}
.play { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 24px; align-items: start; }
.puzzle-area { min-width: 0; display: flex; flex-direction: column; align-items: center; gap: 12px; }
.side-panel p { margin: 0 0 10px; }
.result-box { max-width: 520px; }
.result-box input { flex: 1 1 200px; }

/* Word search */
.ws-wrap { position: relative; --cell: 32px; touch-action: none; user-select: none; -webkit-user-select: none; }
.ws-grid { display: grid; border: 2px solid var(--cell-line); border-radius: 9px; background: var(--cell-bg); cursor: crosshair; }
.ws-cell {
  width: var(--cell);
  height: var(--cell);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: calc(var(--cell) * .52);
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
}
.ws-cell.picked { background: var(--accent-soft); border-radius: 50%; }
.ws-overlay { position: absolute; inset: 2px; width: calc(100% - 4px); height: calc(100% - 4px); pointer-events: none; }
.ws-overlay line { stroke-linecap: round; stroke-width: .78; }
.ws-overlay line.sel { stroke: var(--accent); stroke-opacity: .3; }
.ws-overlay line.found { stroke-opacity: .38; }
.ws-overlay line.revealed { stroke: var(--muted); stroke-opacity: .25; }
.word-list { list-style: none; padding: 0; margin: 0; columns: 2; column-gap: 16px; }
.word-list li { padding: 3px 0; break-inside: avoid; font-weight: 500; }
.word-list li.found { text-decoration: line-through; color: var(--muted); }
.progress { color: var(--muted); font-weight: 500; }

/* Crossword */
.cw-cluebar { width: 100%; min-height: 2.6em; background: var(--accent-soft); border-radius: 9px; padding: 8px 12px; font-weight: 600; }
.cw-grid { --cell: 36px; display: grid; }
.cw-empty { width: var(--cell); height: var(--cell); }
.cw-cell { position: relative; width: var(--cell); height: var(--cell); background: var(--cell-bg); outline: 1.5px solid var(--cell-line); outline-offset: -.75px; }
.cw-cell input {
  width: 100%;
  height: 100%;
  border: 0;
  padding: calc(var(--cell) * .12) 0 0;
  background: transparent;
  text-align: center;
  text-transform: uppercase;
  font-weight: 700;
  font-size: calc(var(--cell) * .5);
  caret-color: transparent;
  cursor: pointer;
}
.cw-cell input:focus { outline: none; }
.cw-num { position: absolute; top: 1px; left: 3px; font-size: calc(var(--cell) * .28); line-height: 1; font-weight: 600; pointer-events: none; }
.cw-cell.hl { background: var(--hl); }
.cw-cell.active { background: var(--active); }
.cw-cell.wrong input { color: var(--bad); }
.cw-cell.wrong::after { content: ""; position: absolute; inset: auto 15% 8% 15%; height: 2px; background: var(--bad); }
.cw-cell.revealed input { color: var(--accent); }
.cw-grid.solved .cw-cell { background: var(--good-soft); }
.clue-list { padding: 0; margin: 0 0 18px; list-style: none; }
.clue-list li { padding: 5px 8px; border-radius: 7px; cursor: pointer; font-size: .92rem; }
.clue-list li:hover { background: var(--surface-2); }
.clue-list li.active { background: var(--hl); }
.clue-list li.complete { color: var(--muted); }
.clue-list b { display: inline-block; min-width: 1.6em; }
.clue-len { color: var(--muted); }

/* Sudoku */
.sd-grid {
  --cell: 52px;
  display: grid;
  border: 3px solid var(--cell-line);
  border-radius: 6px;
  background: var(--cell-bg);
  outline: none;
}
.sd-grid:focus-visible { box-shadow: 0 0 0 3px var(--accent-soft); }
.sd-cell {
  width: var(--cell);
  height: var(--cell);
  display: grid;
  place-items: center;
  font-size: calc(var(--cell) * .5);
  font-weight: 600;
  color: var(--accent);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  user-select: none;
}
.sd-cell.given { color: var(--ink); font-weight: 800; }
.sd-cell.box-r { border-right: 2.5px solid var(--cell-line); }
.sd-cell.box-b { border-bottom: 2.5px solid var(--cell-line); }
.sd-cell.peer { background: var(--surface-2); }
.sd-cell.same { background: var(--accent-soft); }
.sd-cell.sel { background: var(--active); color: #1d2433; }
.sd-cell.conflict { color: var(--bad); }
.sd-cell.wrong { background: var(--bad-soft); color: var(--bad); }
.sd-cell.revealed { color: var(--good); }
.sd-grid.solved .sd-cell { background: var(--good-soft); }
.sd-pad { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; max-width: 460px; }
.sd-pad .btn { min-width: 46px; height: 46px; font-size: 1.1rem; }

/* Logic grid */
.lg-wrap { max-width: 100%; overflow-x: auto; }
.lg-table { border-collapse: collapse; font-size: .82rem; }
.lg-table th { font-weight: 600; }
.lg-table .corner { text-align: left; vertical-align: bottom; padding: 4px; font-weight: 400; font-size: .74rem; max-width: 120px; }
.lg-table .cat-col { text-align: center; padding: 4px; border-bottom: 1px solid var(--line); text-transform: capitalize; }
.lg-table .item-col { height: 92px; vertical-align: bottom; padding: 4px 0; }
.lg-table .cat-row { width: 26px; padding: 0 2px; text-transform: capitalize; }
.lg-table .item-row { text-align: right; padding: 0 8px; white-space: nowrap; font-weight: 500; }
.vert { writing-mode: vertical-rl; transform: rotate(180deg); white-space: nowrap; display: inline-block; }
.lg-cell {
  width: 30px;
  height: 30px;
  min-width: 30px;
  text-align: center;
  border: 1px solid var(--line);
  background: var(--cell-bg);
  cursor: pointer;
  font-size: 1rem;
  user-select: none;
}
.lg-cell:hover { background: var(--accent-soft); }
.lg-cell.x { color: var(--muted); }
.lg-cell.o { color: var(--accent); font-size: 1.15rem; }
.lg-cell.wrong { background: var(--bad-soft); color: var(--bad); }
.lg-table td.lg-cell.blk-end, .lg-table th.blk-end { border-right: 2px solid var(--cell-line); }
.lg-table tr.blk-bottom td.lg-cell { border-bottom: 2px solid var(--cell-line); }
.lg-table .blank { border: 0; background: transparent; }
.lg-table.solved .lg-cell { background: var(--good-soft); }
.lg-clues { padding-left: 1.4em; margin: 0; }
.lg-clues li { padding: 4px 0; cursor: pointer; }
.lg-clues li.done { text-decoration: line-through; color: var(--muted); }

/* ============ Daily ============ */
.daily-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; flex-wrap: wrap; margin: 24px 0 20px; }
.streak-box { display: flex; gap: 24px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 20px; }
.streak-box > div { display: grid; text-align: center; }
.streak-num { font-size: 2rem; font-weight: 800; line-height: 1; }
.streak-num::before { content: "🔥 "; font-size: 1.4rem; }
.streak-num.small { font-size: 1.4rem; }
.streak-num.small::before { content: "🏆 "; font-size: 1rem; }
.daily-foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 20px; }
.daily-foot p { margin: 2px 0 0; }
.week-strip { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 8px; }
.week-day { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 10px 6px; text-align: center; }
.week-day.today { border-color: var(--accent); }
.week-day small { display: block; color: var(--muted); }
.week-games { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; margin-top: 6px; }
.week-games a { text-decoration: none; filter: grayscale(1); opacity: .45; padding: 2px; border-radius: 6px; }
.week-games a:hover { opacity: 1; filter: none; }
.week-games a.solved { filter: none; opacity: 1; background: var(--good-soft); }

/* ============ Create ============ */
.creator { position: sticky; top: 16px; max-height: calc(100vh - 32px); overflow-y: auto; }
.creator h1 { font-size: 1.45rem; }
.creator .type-tabs.four { grid-template-columns: 1fr 1fr; }
.sub-h { font-size: 1.1rem; margin-bottom: 12px; }
.use-block { display: grid; gap: 8px; margin-bottom: 18px; }
.use-block .row select { width: auto; }
.ai-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin: -4px 0 14px; }
.share-box { background: var(--accent-soft); border-radius: 11px; padding: 12px; }
.share-box input { flex: 1 1 200px; min-width: 0; }
.share-box .field-hint { margin: 6px 0 0; }
.share-box .field-hint:empty { display: none; }

/* ============ Dashboard ============ */
.dash-head { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; margin: 20px 0; }
.dash-head p { margin: 0; }
.stat-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-bottom: 20px; }
.stat { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; display: grid; }
.stat-num { font-size: 1.8rem; font-weight: 800; }
.table-wrap { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.data-table th { text-align: left; color: var(--muted); font-weight: 600; font-size: .82rem; padding: 8px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.data-table td { padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.data-table .num { text-align: right; font-variant-numeric: tabular-nums; }
.data-table .actions { display: flex; gap: 4px; flex-wrap: wrap; }
.empty { text-align: center; padding: 24px 8px; }

/* ============ Live ============ */
.code-input { text-align: center; font-size: 2rem !important; letter-spacing: .3em; font-weight: 800; text-transform: uppercase; }
.host-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px; margin-top: 12px; }
.join-card { text-align: center; }
.join-card p { margin: 0; }
.big-code { font-size: clamp(3rem, 10vw, 6rem); font-weight: 900; letter-spacing: .12em; color: var(--accent); line-height: 1.1; margin: 8px 0 12px; font-family: ui-monospace, Consolas, monospace; }
.join-card h2 { margin-bottom: 18px; }
.big-timer { font-size: 2.2rem; margin: 16px 0 0; }
.leaderboard { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; text-align: left; }
.leaderboard li {
  display: grid;
  grid-template-columns: 2em minmax(0, 1fr) minmax(60px, 1.2fr) 5.5em;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  background: var(--surface-2);
  border-radius: 10px;
}
.leaderboard li.me { outline: 2px solid var(--accent); }
.leaderboard li.done { background: var(--good-soft); }
.rank { font-weight: 800; color: var(--muted); text-align: center; }
.lb-name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar { height: 8px; border-radius: 99px; background: var(--line); overflow: hidden; }
.bar span { display: block; height: 100%; background: var(--accent); border-radius: 99px; transition: width .4s; }
.lb-stat { text-align: right; font-variant-numeric: tabular-nums; font-weight: 700; font-size: .9rem; }
.pulse { width: 18px; height: 18px; border-radius: 50%; background: var(--accent); margin: 18px auto; animation: pulse 1.4s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { transform: scale(.7); opacity: .5; } 50% { transform: scale(1.2); opacity: 1; } }

/* ============ Toast ============ */
.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translate(-50%, 20px);
  background: var(--ink);
  color: var(--bg);
  padding: 10px 16px;
  border-radius: 999px;
  font-weight: 600;
  font-size: .9rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s, transform .2s;
  max-width: calc(100% - 32px);
  z-index: 50;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ============ Responsive ============ */
@media (max-width: 1000px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .creator { position: static; max-height: none; }
  .play { grid-template-columns: minmax(0, 1fr); }
  .teacher-band, .host-grid { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 760px) {
  .site-header { flex-wrap: wrap; padding: 12px 16px; }
  .nav-toggle { display: block; }
  .main-nav { display: none; width: 100%; flex-direction: column; align-items: stretch; margin: 0; }
  .site-header.nav-open .main-nav { display: flex; }
  .auth-slot { margin: 6px 0 0; }
  .hero { grid-template-columns: minmax(0, 1fr); padding: 20px 16px 0; gap: 24px; }
  .hero-art { order: -1; }
  .mini-ws { width: min(260px, 80%); }
  .page, .layout { padding: 4px 16px 0; }
  .section { padding: 0 16px; margin-top: 36px; }
  .panel { padding: 16px; }
  .teacher-band { padding: 22px; border-radius: 16px; margin: 36px 16px 0; }
  .type-tabs.four { grid-template-columns: 1fr 1fr; }
  .stat-row { grid-template-columns: minmax(0, 1fr); }
  .week-strip { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .leaderboard li { grid-template-columns: 1.6em minmax(0, 1fr) 4.8em; }
  .leaderboard .bar { display: none; }
}

/* ============ Ads ============ */
.ad-wrap { margin: 24px auto; max-width: 970px; text-align: center; }
.ad-wrap.ad-side { max-width: 336px; }
.ad-label { display: block; font-size: .68rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-bottom: 4px; }
.ad-placeholder {
  border: 1px dashed var(--line);
  border-radius: 10px;
  color: var(--muted);
  font-size: .8rem;
  padding: 18px 12px;
  background: var(--surface-2);
}
.ad-banner .ad-placeholder { padding: 12px; }
body.no-ads [data-ad] { display: none !important; }

/* ============ Simple text pages ============ */
.prose { max-width: 760px; margin: 20px auto; }
.prose h2 { margin: 22px 0 6px; font-size: 1.15rem; }
.prose li { margin: 4px 0; }

/* ============ Word scramble game ============ */
.sc-list { list-style: none; counter-reset: sc; padding: 0; margin: 0; width: 100%; max-width: 640px; display: grid; gap: 10px; }
.sc-row {
  counter-increment: sc;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 6px 12px;
  align-items: center;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
}
.sc-tiles { display: flex; flex-wrap: wrap; gap: 3px; }
.sc-tiles::before { content: counter(sc) "."; color: var(--muted); font-weight: 700; margin-right: 6px; align-self: center; }
.sc-tile {
  width: 1.8em;
  height: 1.8em;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  border-radius: 6px;
  font-weight: 800;
  font-family: ui-monospace, Consolas, monospace;
}
.sc-answer { display: flex; gap: 4px; }
.sc-answer input { text-transform: uppercase; font-weight: 700; letter-spacing: .06em; }
.sc-clue { grid-column: 1 / -1; font-size: .88rem; }
.sc-row.solved { background: var(--good-soft); border-color: transparent; }
.sc-row.solved input { color: var(--good); }
.sc-row.wrong { border-color: var(--bad); }
.sc-row.revealed input { color: var(--accent); }

/* ============ Tools ============ */
.tools-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; flex-wrap: wrap; margin: 24px 0 8px; }
.tool-search { max-width: 340px; font-size: 1rem; padding: 11px 14px !important; }
.tool-cat { margin-top: 28px; }
.tool-cat h2 { margin-bottom: 12px; }
.tool-grid-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.tool-card {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--ink);
  text-decoration: none;
  transition: border-color .15s, transform .15s;
}
.tool-card:hover { border-color: var(--accent); transform: translateY(-1px); }
.tool-card small { display: block; color: var(--muted); font-size: .84rem; margin-top: 2px; }
.tool-emoji { font-size: 1.6rem; line-height: 1.1; }
.tool-page h1 { margin-top: 4px; }
.crumbs { font-size: .86rem; color: var(--muted); margin-top: 16px; }
.crumbs a { color: var(--muted); }
.tool-panel { padding: 22px; }
.tool-h { font-size: 1.1rem; margin: 6px 0 14px; }
.tool-h:not(:first-child) { margin-top: 28px; }
.tool-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 24px; align-items: start; }
.tool-form .field { margin-bottom: 12px; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.three { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
.tool-result { background: var(--surface-2); border: 1px solid var(--line); border-radius: 14px; padding: 18px; display: grid; gap: 14px; }
.stat-box { display: grid; gap: 2px; }
.stat-box span { color: var(--muted); font-size: .86rem; }
.stat-box b { font-size: 1.25rem; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.stat-box.big b { font-size: clamp(1.6rem, 4vw, 2.3rem); color: var(--accent); line-height: 1.15; }
.stat-row-small { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; margin: 8px 0 18px; }
.stat-grid .stat-box { background: var(--surface-2); border: 1px solid var(--line); border-radius: 12px; padding: 12px; }
.result-list { display: grid; gap: 6px; }
.result-list > div { display: flex; align-items: center; gap: 8px; border-bottom: 1px dashed var(--line); padding-bottom: 6px; }
.result-list b { margin-left: auto; font-variant-numeric: tabular-nums; }
.dot { width: 10px; height: 10px; border-radius: 3px; flex: none; }
.c1 { background: #3b5bdb; }
.c2 { background: #f08c00; }
.c3 { background: #2f9e44; }
.c4 { background: #ae3ec9; }
.stack-bar { display: flex; height: 14px; border-radius: 99px; overflow: hidden; background: var(--line); }
.stack-bar span { height: 100%; transition: width .3s; }
details.more, details.table-details { margin-top: 6px; }
details.table-details { margin-top: 20px; }
details > summary { cursor: pointer; font-weight: 600; color: var(--accent); padding: 6px 0; }
details.more[open] { padding-bottom: 4px; }
.disclaimer { color: var(--muted); font-size: .8rem; margin: 16px 0 0; }
.chip-row { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.chip {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: .88rem;
  font-weight: 600;
  cursor: pointer;
}
.chip.on { background: var(--accent-soft); border-color: var(--accent); }
.callout { background: var(--accent-soft); border-radius: 10px; padding: 10px 12px; font-weight: 600; }
.callout:empty { display: none; }
.mini-chart { display: flex; align-items: flex-end; gap: 3px; height: 120px; }
.mini-chart span { flex: 1; height: 100%; position: relative; }
.mini-chart i { position: absolute; left: 0; right: 0; bottom: 0; border-radius: 3px 3px 0 0; }
.mini-chart i.c1 { opacity: .9; }
.gauge { position: relative; display: grid; grid-template-columns: 14% 26% 20% 40%; height: 12px; border-radius: 99px; overflow: visible; }
.gauge span:first-child { border-radius: 99px 0 0 99px; }
.gauge span:nth-child(4) { border-radius: 0 99px 99px 0; }
.gauge .g1, .bmi-cat.g1 { background: #4dabf7; }
.gauge .g2, .bmi-cat.g2 { background: #51cf66; }
.gauge .g3, .bmi-cat.g3 { background: #fcc419; }
.gauge .g4, .bmi-cat.g4 { background: #ff6b6b; }
.gauge i { position: absolute; top: -5px; width: 4px; height: 22px; background: var(--ink); border-radius: 2px; transform: translateX(-50%); transition: left .3s; }
.gauge-labels { display: grid; grid-template-columns: 14% 26% 20% 40%; }
.bmi-cat { margin: 0; display: inline-block; justify-self: start; padding: 3px 12px; border-radius: 999px; font-weight: 700; color: #1d2433; }
.bmi-cat:empty { display: none; }
.pct-rows { display: grid; gap: 12px; }
.panel-soft { background: var(--surface-2); border: 1px solid var(--line); border-radius: 12px; padding: 14px; }
.pct-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-weight: 500; }
.inline-num { width: 110px !important; }
input.inline-num { padding: 7px 9px; }
.pct-res { color: var(--accent); font-size: 1.15rem; }
.convert-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr) auto minmax(0, 1.4fr); gap: 8px; align-items: center; margin: 6px 0 12px; }
.convert-result { font-size: clamp(1.2rem, 3.5vw, 1.8rem); font-weight: 800; color: var(--accent); margin-bottom: 18px; overflow-wrap: anywhere; }
.scr-out { font-size: 1.05rem; padding-left: 1.6em; }
.scr-out li { margin: 4px 0; }
.scr-out code { font-size: 1rem; letter-spacing: .08em; }
.pw-out { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.pw-out code { flex: 1 1 260px; font-size: clamp(1rem, 3vw, 1.35rem); padding: 12px 14px; overflow-wrap: anywhere; }
.pw-meter { height: 8px; background: var(--line); border-radius: 99px; overflow: hidden; margin: 14px 0 4px; }
.pw-meter span { display: block; height: 100%; transition: width .3s; }
.pw-meter .weak { background: var(--bad); }
.pw-meter .fair { background: #fcc419; }
.pw-meter .strong { background: var(--good); }
.check-grid { display: flex; flex-wrap: wrap; gap: 10px 18px; }
input[type="range"] { width: 100%; accent-color: var(--accent); }
.random-out { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; align-items: center; min-height: 90px; margin-top: 18px; }
.random-out p { width: 100%; text-align: center; margin: 4px 0 0; }
.big-num { font-size: clamp(1.8rem, 6vw, 3rem); font-weight: 900; background: var(--accent-soft); border-radius: 14px; padding: 6px 16px; min-width: 1.6em; text-align: center; }
.random-out.pop .big-num { animation: pop .35s ease both; }
.promo-band { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; background: var(--accent-soft); border-radius: 16px; padding: 18px 20px !important; }

/* ============ Online play ============ */
.online-band { background: linear-gradient(135deg, var(--accent-soft), var(--surface)); border: 1px solid var(--line); border-radius: 22px; padding: 32px !important; max-width: 1192px; }
.online-band h2 { font-size: clamp(1.3rem, 3vw, 1.9rem); margin-bottom: 6px; }
.online-pill { display: inline-flex; align-items: center; gap: 6px; background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; font-size: .9rem; margin: 0; }
.live-dot { width: 9px; height: 9px; border-radius: 50%; background: #40c057; box-shadow: 0 0 0 0 rgba(64, 192, 87, .6); animation: livePulse 1.8s infinite; }
@keyframes livePulse { 70% { box-shadow: 0 0 0 8px rgba(64, 192, 87, 0); } 100% { box-shadow: 0 0 0 0 rgba(64, 192, 87, 0); } }
.arena-hero { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 24px; align-items: center; margin-top: 20px; }
.me-card { margin: 0; display: grid; gap: 12px; }
.me-top { display: flex; gap: 12px; align-items: center; }
.avatar { width: 52px; height: 52px; border-radius: 50%; display: grid; place-items: center; font-weight: 900; font-size: 1.4rem; background: var(--accent); color: var(--accent-ink); flex: none; }
.me-name { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.me-name b { font-size: 1.15rem; }
.badge { font-size: .72rem; font-weight: 700; padding: 2px 8px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--line); color: var(--muted); }
.badge.member { background: var(--good-soft); color: var(--good); border-color: transparent; }
.me-stats { display: grid; grid-template-columns: repeat(3, 1fr); text-align: center; background: var(--surface-2); border-radius: 12px; padding: 10px; }
.me-stats b { display: block; font-size: 1.35rem; }
.me-stats span { color: var(--muted); font-size: .8rem; }
.me-card p { margin: 0; }
.quick-card { cursor: pointer; text-align: left; font: inherit; }
.two-col { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px; }
.two-col .panel { margin: 0; }
.two-col h2 { margin-bottom: 6px; }
.small-code { font-size: 1.4rem !important; flex: 1 1 140px; width: auto !important; }
.type-tabs.compact { margin: 0; grid-template-columns: auto auto; }
.type-tabs.compact .tab { padding: 6px 14px; }
.me-row td { background: var(--accent-soft); }
.room-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 12px; flex-wrap: wrap; margin: 16px 0; }
.room-head h1 { margin: 0; }
.code-chip { font-family: ui-monospace, Consolas, monospace; font-weight: 800; background: var(--surface); border: 1px solid var(--line); border-radius: 9px; padding: 7px 12px; }
.countdown { font-size: clamp(4rem, 14vw, 7rem); font-weight: 900; color: var(--accent); line-height: 1; animation: pop .4s ease both; }
.player-chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin: 14px 0 20px; }
.pchip { background: var(--surface-2); border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; font-weight: 600; }
.pchip.me { border-color: var(--accent); background: var(--accent-soft); }
.invite-url { max-width: 460px; text-align: center; }
#invitePanel { margin-bottom: 18px; }
#invitePanel .row { margin-bottom: 8px; }
.race-bar { display: grid; gap: 6px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; margin-bottom: 14px; }
.race-bar p { margin: 0; }
.race-row { display: grid; grid-template-columns: minmax(80px, 180px) minmax(0, 1fr) 5.5em; gap: 10px; align-items: center; font-size: .9rem; }
.race-row.me .lb-name { color: var(--accent); }
.race-row.done .bar span { background: var(--good); }

@media (max-width: 1000px) {
  .tool-grid, .arena-hero, .two-col { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 760px) {
  .online-band { padding: 22px !important; margin: 36px 16px 0; border-radius: 16px; }
  .two, .three { grid-template-columns: minmax(0, 1fr); }
  .tool-panel { padding: 14px; }
  .stat-row-small { grid-template-columns: minmax(0, 1fr); }
  .convert-row { grid-template-columns: minmax(0, 1fr) auto; }
  .convert-row #v { grid-column: 1 / -1; }
  .convert-row #from { grid-column: 1; }
  .convert-row #swap { grid-column: 2; grid-row: 2 / 4; }
  .convert-row #to { grid-column: 1; }
  .sc-row { grid-template-columns: minmax(0, 1fr); }
  .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .game-card { padding: 14px; }
  .game-card .muted { font-size: .84rem; }
  .race-row { grid-template-columns: minmax(0, 1fr) 4.8em; }
  .race-row .bar { grid-column: 1 / -1; grid-row: 2; }
  .tool-search { max-width: none; }
}

/* Online results list: rank, name, time, points on one line at every width. */
#resultBoard li { grid-template-columns: 1.8em minmax(0, 1fr) auto 3em; }