/* pollearn. One stylesheet, light and dark, no build step. */

:root {
  /* Design language borrowed from swystems.usi.ch (Wowchemy/Bootstrap): white pages, grey
     section bands, hairline borders, Helvetica, and the lab's #1565c0 blue. */
  --bg: #ffffff;
  --band: #f7f7f7;
  --surface: #ffffff;
  --sunk: #f1f3f5;
  --ink: #212529;
  --heading: #313131;
  --ink-2: #495057;
  --muted: #6c757d;
  --nav: #34495e;
  --line: #dee2e6;
  --primary: #1565c0;
  --primary-hover: #104d92;
  --primary-ink: #ffffff;
  --accent: #1565c0;
  --accent-soft: #e3eefa;
  --bar: #1565c0;
  --track: #e9ecef;
  --ok: #1e7e34;
  --ok-soft: #e6f4ea;
  --bad: #c82333;
  --bad-soft: #fbe9eb;
  --radius: 6px;
  --shadow: 0 1px 4px rgb(0 0 0 / 0.04);
  --nav-shadow: 0 0.125rem 0.25rem 0 rgb(0 0 0 / 0.11);
  --sans: "Helvetica Neue", Helvetica, Arial, "Liberation Sans", sans-serif;
  --mono: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #23252f;
    --band: #282a36;
    --surface: #282a36;
    --sunk: #31333f;
    --ink: #f8f8f2;
    --heading: #ffffff;
    --ink-2: #d0d1d6;
    --muted: #a0a1a8;
    --nav: rgb(255 255 255 / 0.85);
    --line: #44475a;
    --primary: #1565c0;
    --primary-hover: #1976d2;
    --primary-ink: #ffffff;
    --accent: #90caf9;
    --accent-soft: #2b3a55;
    --bar: #64b5f6;
    --track: #363848;
    --ok: #6fcf8b;
    --ok-soft: #1f3a2a;
    --bad: #f28b95;
    --bad-soft: #3d2328;
    --shadow: none;
    --nav-shadow: 0 0.125rem 0.25rem rgb(255 255 255 / 0.11);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.5 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.2; text-wrap: balance; margin: 0 0 0.5em; color: var(--heading); font-weight: 700; }
a:hover { color: var(--primary-hover); }
p { margin: 0 0 0.75em; text-wrap: pretty; }
input, textarea, select, button { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.muted { color: var(--muted); }
.small { font-size: 0.875rem; }
.spacer { flex: 1; }
.stack { display: grid; gap: 10px; }
.row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.code { font-family: var(--mono); letter-spacing: 0.08em; font-weight: 700; }
.error { color: var(--bad); }
.empty { text-align: center; padding: 24px 8px; }

/* ---------- controls ---------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 16px; border-radius: 0.3rem; border: 1px solid var(--line);
  background: var(--surface); color: var(--nav); font-weight: 400; text-decoration: none;
  cursor: pointer; white-space: nowrap; transition: border-color 0.12s, background 0.12s;
}
.btn:hover { border-color: var(--muted); color: var(--ink); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: var(--primary-ink); }
.btn.primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); color: var(--primary-ink); }
.btn.ghost { background: transparent; border-color: transparent; }
.btn.ghost:hover { background: var(--sunk); }
.btn.danger { color: var(--bad); }
.btn.danger:hover { border-color: var(--bad); }
.btn.block { display: flex; width: 100%; }
.btn.small { padding: 5px 10px; font-size: 0.875rem; }
.btn:disabled { opacity: 0.45; cursor: default; }

input:not([type]), input[type="text"], textarea, select {
  width: 100%; padding: 9px 12px; border-radius: 0.25rem; border: 1px solid var(--line);
  background: var(--surface); transition: border-color 0.12s;
}
input:not([type]):focus, textarea:focus, select:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 0.2rem rgb(21 101 192 / 0.25); }
textarea { resize: vertical; }
select { width: auto; padding-right: 28px; }
input::placeholder, textarea::placeholder { color: var(--muted); opacity: 0.8; }
.field { display: grid; gap: 6px; font-size: 0.875rem; color: var(--muted); }
.field input { color: var(--ink); font-size: 1rem; }

.switch { display: inline-flex; align-items: center; gap: 10px; cursor: pointer; user-select: none; }
.switch input {
  appearance: none; width: 36px; height: 22px; border-radius: 11px; background: var(--line);
  position: relative; cursor: pointer; transition: background 0.15s; flex: none; margin: 0;
}
.switch input::after {
  content: ""; position: absolute; top: 3px; left: 3px; width: 16px; height: 16px; border-radius: 50%;
  background: #fff; transition: transform 0.15s; box-shadow: 0 1px 2px rgb(0 0 0 / 0.2);
}
.switch input:checked { background: var(--primary); }
.switch input:checked::after { transform: translateX(14px); }

.icon-btn {
  border: 0; background: transparent; color: var(--muted); width: 32px; height: 32px; border-radius: 6px;
  cursor: pointer; display: inline-grid; place-items: center; flex: none;
}
.icon-btn:hover { background: var(--sunk); color: var(--ink); }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }

.badge:not(:empty) {
  display: inline-block; min-width: 1.4em; padding: 0 0.4em; border-radius: 999px;
  background: var(--primary); color: var(--primary-ink); font-size: 0.75em; font-weight: 700; line-height: 1.5; text-align: center;
}

.conn { font-size: 0.8125rem; color: var(--bad); background: var(--bad-soft); padding: 2px 10px; border-radius: 999px; }

.toasts { position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%); display: grid; gap: 8px; z-index: 50; pointer-events: none; width: max-content; max-width: calc(100vw - 32px); }
.toast { background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: 8px; font-size: 0.9375rem; box-shadow: 0 6px 24px rgb(0 0 0 / 0.18); transition: opacity 0.3s, transform 0.3s; }
.toast.bad { background: var(--bad); color: #fff; }
.toast.out { opacity: 0; transform: translateY(6px); }

/* ---------- chrome ---------- */

.topbar { display: flex; align-items: center; gap: 12px; padding: 12px 20px; min-height: 70px; background: var(--surface); box-shadow: var(--nav-shadow); position: sticky; top: 0; z-index: 10; }
.topbar .btn.ghost { color: var(--nav); }
.topbar form { margin: 0; }
.wordmark { font-weight: 700; font-size: 1.5rem; color: var(--heading); text-decoration: none; }
.wordmark:hover { color: var(--heading); }
.crumb { color: var(--line); }
.title-input { border: 1px solid transparent !important; background: transparent !important; font-weight: 700; max-width: 420px; padding: 6px 8px !important; }
.title-input:hover { border-color: var(--line) !important; }
.saved { font-size: 0.875rem; min-width: 5em; text-align: right; }
.page { max-width: 1080px; margin: 0 auto; padding: 28px 20px 80px; }
.page-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 20px; }
.page-head h1 { margin: 0; font-weight: 400; font-size: 2.25rem; }
.inline-form { display: flex; gap: 8px; flex: 1; max-width: 440px; }
.narrow { max-width: 420px; margin: 0 auto; padding: 24px 20px; }
.center-page { min-height: 100dvh; display: flex; flex-direction: column; justify-content: center; gap: 16px; }
.center-page .wordmark { margin-bottom: 24px; }
.or { text-align: center; color: var(--muted); font-size: 0.875rem; }

/* ---------- home ---------- */

.home-main { background: var(--band); min-height: calc(100dvh - 70px); display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 20px 16px 15vh; gap: 4px; }
.home-main h1 { font-size: clamp(2.25rem, 6vw, 3rem); font-weight: 400; margin-bottom: 0.6em; }
.code-form { display: flex; gap: 8px; width: 100%; max-width: 420px; margin-bottom: 12px; }
.code-form input { font: 600 1.5rem/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; text-align: center; padding: 14px; }
.code-form .btn { padding: 0 24px; font-size: 1.125rem; }

/* ---------- dashboard ---------- */

.deck-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.deck { display: flex; align-items: center; gap: 16px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; box-shadow: var(--shadow); }
.deck-main { flex: 1; min-width: 0; display: grid; text-decoration: none; color: inherit; }
.deck-main strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.deck-main span { font-size: 0.875rem; }
.deck-main:hover strong { color: var(--primary); }
.deck .code { color: var(--muted); font-size: 0.875rem; }
@media (max-width: 560px) { .deck .code { display: none; } }

/* ---------- editor ---------- */

.editor { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 24px; align-items: start; }
@media (max-width: 860px) { .editor { grid-template-columns: minmax(0, 1fr); } .side { order: -1; } }
.side { display: grid; gap: 14px; position: sticky; top: 76px; }
@media (max-width: 860px) { .side { position: static; } }
.join-card { text-align: center; }
.join-card img { width: 100%; max-width: 200px; aspect-ratio: 1; border-radius: 6px; background: #fff; }
.big-code { font-size: 1.75rem; margin: 6px 0 2px; }
.join-card a { font-size: 0.875rem; word-break: break-all; }
.q-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.q-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px 16px; display: grid; gap: 12px; box-shadow: var(--shadow); }
.q-card:focus-within { border-color: color-mix(in srgb, var(--accent) 50%, var(--line)); }
.q-card-head { display: flex; align-items: center; gap: 8px; margin: -4px -6px -4px 0; }
.q-num { font: 700 0.8125rem var(--mono); background: var(--sunk); border-radius: 6px; padding: 2px 8px; }
.q-type { font-size: 0.875rem; color: var(--muted); }
.prompt { font-size: 1.125rem; font-weight: 700; }
.opt-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.opt-list li { display: flex; align-items: center; gap: 8px; }
.opt-list .mark[aria-pressed="true"] { background: var(--ok-soft); color: var(--ok); }
.opt-list li.correct input { border-color: var(--ok); }
.letter { font: 700 0.8125rem var(--mono); width: 26px; height: 26px; border-radius: 6px; display: inline-grid; place-items: center; background: var(--sunk); color: var(--ink-2); flex: none; }
.scale-edit { display: grid; gap: 10px; }
.scale-edit label { display: grid; grid-template-columns: 44px auto 1fr; align-items: center; gap: 10px; }
.add-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 18px; padding: 14px; border: 1px dashed var(--line); border-radius: var(--radius); }

/* ---------- audience (phones) ---------- */

.audience { min-height: 100dvh; display: flex; flex-direction: column; }
.aud-bar { display: flex; align-items: center; gap: 10px; padding: 14px 16px; padding-top: max(14px, env(safe-area-inset-top)); background: var(--surface); border-bottom: 1px solid var(--line); }
.aud-title { font-weight: 700; color: var(--heading); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }
.tabs { display: flex; background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.tabs button { flex: 1; border: 0; background: none; padding: 12px; font-weight: 700; color: var(--muted); border-bottom: 2px solid transparent; cursor: pointer; }
.tabs button[aria-pressed="true"] { color: var(--heading); border-bottom-color: var(--primary); }
.aud-main { flex: 1; width: 100%; max-width: 620px; margin: 0 auto; padding: 20px 16px max(40px, env(safe-area-inset-bottom)); }
.gate { padding-top: 12vh; display: grid; gap: 12px; text-align: center; }
.gate .code-form { margin: 8px auto 0; }
.lobby { text-align: center; padding-top: 14vh; }
.lobby h1 { font-size: 2.25rem; font-weight: 400; }
.pulse { width: 14px; height: 14px; border-radius: 50%; background: var(--accent); margin: 0 auto 24px; animation: pulse 1.8s ease-out infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 50%, transparent); } 100% { box-shadow: 0 0 0 22px transparent; } }
.q-meta { font-size: 0.875rem; color: var(--muted); margin-bottom: 6px; }
.q-prompt { font-size: 1.6rem; margin-bottom: 18px; white-space: pre-wrap; overflow-wrap: anywhere; }
.hint { font-size: 0.875rem; margin-bottom: 8px; }
.choices { display: grid; gap: 10px; margin-bottom: 14px; }
.choice {
  display: flex; align-items: center; gap: 12px; width: 100%; text-align: left; padding: 14px;
  background: var(--surface); border: 1.5px solid var(--line); border-radius: var(--radius); cursor: pointer;
  font-size: 1.0625rem; font-weight: 400; transition: border-color 0.12s, background 0.12s, transform 0.08s;
  overflow-wrap: anywhere;
}
.choice:active:not(:disabled) { transform: scale(0.985); }
.choice[aria-checked="true"] { border-color: var(--primary); background: var(--accent-soft); }
.choice[aria-checked="true"] .letter { background: var(--primary); color: var(--primary-ink); }
.choice:disabled { cursor: default; opacity: 0.7; }
.scale-pick { display: flex; gap: 6px; }
.scale-pick button {
  flex: 1; min-width: 0; aspect-ratio: 1; max-height: 64px; border-radius: 10px; border: 1.5px solid var(--line);
  background: var(--surface); font: 700 1.125rem var(--mono); cursor: pointer;
}
.scale-pick button[aria-checked="true"] { background: var(--primary); border-color: var(--primary); color: var(--primary-ink); }
.scale-ends { display: flex; justify-content: space-between; gap: 16px; font-size: 0.875rem; color: var(--muted); margin: 8px 0 14px; }
.scale-ends span:last-child { text-align: right; }
.note { font-size: 0.9375rem; color: var(--muted); margin-top: 12px; }
.note.ok { color: var(--ok); }
.verdict { font-weight: 700; padding: 10px 14px; border-radius: 0.25rem; }
.verdict.ok { background: var(--ok-soft); color: var(--ok); }
.verdict.bad { background: var(--bad-soft); color: var(--bad); }
.aud-results:not(:empty) { margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--line); }
.ask { grid-template-columns: 1fr auto; align-items: end; margin-bottom: 18px; }
.qa-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.qa-list li { display: flex; gap: 12px; align-items: flex-start; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 12px; }
.qa-list li p { margin: 0; overflow-wrap: anywhere; }
.qa-list li.answered { opacity: 0.6; }
.vote { display: grid; justify-items: center; min-width: 44px; padding: 4px 0; border: 1px solid var(--line); border-radius: 8px; background: none; cursor: pointer; font-size: 0.75rem; color: var(--muted); }
.vote span { font: 700 0.9375rem var(--mono); color: var(--ink); }
.vote[aria-pressed="true"] { border-color: var(--primary); color: var(--accent); background: var(--accent-soft); }

/* ---------- results ---------- */

.bars { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.bars li { display: grid; grid-template-columns: 1fr auto; grid-template-areas: "label value" "track track"; gap: 4px 12px; align-items: end; }
.bar-label { grid-area: label; font-weight: 400; overflow-wrap: anywhere; }
.bar-value { grid-area: value; font: 600 0.9375rem var(--mono); font-variant-numeric: tabular-nums; color: var(--ink-2); }
.bar-track { grid-area: track; height: 12px; background: var(--track); border-radius: 4px; overflow: hidden; }
.bar-fill { height: 100%; width: 0; background: var(--bar); border-radius: 4px; transition: width 0.5s cubic-bezier(0.2, 0.7, 0.2, 1); }
.bars li.correct .bar-fill { background: var(--ok); }
.bars li.correct .bar-label { font-weight: 700; }
.tick { color: var(--ok); font-weight: 700; }
.result-total { margin-top: 14px; font-size: 0.875rem; color: var(--muted); }
.columns { list-style: none; margin: 0; padding: 0; display: flex; gap: 6px; height: 160px; align-items: stretch; }
.columns li { flex: 1; display: grid; grid-template-rows: 1fr auto; gap: 6px; min-width: 0; }
.col-track { display: flex; align-items: flex-end; background: var(--track); border-radius: 4px 4px 0 0; }
.col-fill { width: 100%; height: 0; background: var(--bar); border-radius: 4px 4px 0 0; transition: height 0.5s cubic-bezier(0.2, 0.7, 0.2, 1); }
.col-label { text-align: center; font: 600 0.875rem var(--mono); color: var(--ink-2); }
.scale-mean { margin-bottom: 14px; }
.scale-mean strong { font: 700 2.25rem/1 var(--sans); color: var(--heading); }
.cloud { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 0.15em 0.6em; padding: 12px 0; line-height: 1.1; }
.word { font-weight: 700; color: var(--ink-2); overflow-wrap: anywhere; transition: font-size 0.4s; }
.word.new { animation: pop 0.35s ease-out; }
.word.w3, .word.w4 { color: var(--accent); }
@keyframes pop { from { opacity: 0; transform: scale(0.85); } }
.wall { list-style: none; margin: 0; padding: 0; columns: 2 220px; column-gap: 10px; }
.wall li { break-inside: avoid; margin-bottom: 10px; padding: 10px 12px; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; overflow-wrap: anywhere; white-space: pre-wrap; }
.wall li.new { animation: pop 0.3s ease-out; }

/* ---------- stage (the projector) ---------- */

.stage { height: 100dvh; display: grid; grid-template-rows: auto 1fr auto; overflow: hidden; font-size: clamp(16px, 1.15vw + 0.4vh, 30px); }
.stage-bar { display: flex; align-items: center; gap: 16px; padding: 0.6em 1.2em; font-size: 0.85em; }
.join-chip { display: flex; align-items: center; gap: 0.7em; text-decoration: none; color: var(--ink-2); }
.join-chip img { width: 2.6em; height: 2.6em; border-radius: 4px; background: #fff; }
.join-chip strong { color: var(--ink); }
.people { color: var(--muted); font-variant-numeric: tabular-nums; }
.stage-main { min-height: 0; overflow: auto; padding: 1em 3.5em 2em; display: grid; }
.q-screen { width: 100%; max-width: 64em; margin: 0 auto; align-self: center; display: grid; gap: 0.6em; }
.q-prompt.big { font-size: 2.3em; font-weight: 400; margin-bottom: 0.4em; }
.q-body.big { font-size: 1.15em; }
.q-body.big .bars { gap: 0.9em; }
.q-body.big .bar-track { height: 0.9em; }
.q-body.big .bar-value { font-size: 1em; }
.q-body.big .columns { height: 13em; }
.q-body.big .cloud { font-size: 1.3em; min-height: 8em; }
.q-body.big .wall { columns: 3 14em; }
.q-status { color: var(--muted); font-weight: 700; min-height: 1.5em; }
.options-preview { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(14em, 1fr)); gap: 0.6em; font-size: 1.15em; }
.options-preview li { display: flex; align-items: center; gap: 0.6em; padding: 0.6em 0.8em; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow-wrap: anywhere; }
.options-preview .letter { width: 1.6em; height: 1.6em; font-size: 0.8em; }
.options-preview li.correct { border-color: var(--ok); background: var(--ok-soft); }
.counter { text-align: center; margin-top: 1.2em; color: var(--muted); }
.counter strong { display: block; font: 400 4.5em/1 var(--sans); color: var(--heading); font-variant-numeric: tabular-nums; }
.join-screen { align-self: center; justify-self: center; display: flex; align-items: center; gap: 4em; flex-wrap: wrap; justify-content: center; }
.qr-big { width: min(60vh, 40vw); aspect-ratio: 1; border-radius: 12px; background: #fff; padding: 0; image-rendering: pixelated; box-shadow: var(--shadow); }
.join-text { display: grid; gap: 0.1em; }
.deck-title { font-size: 1.6em; margin-bottom: 1em; max-width: 14em; }
.join-how { color: var(--muted); margin: 0; font-size: 1.1em; }
.join-url { font-size: 2em; font-weight: 700; margin: 0 0 0.4em; color: var(--heading); }
.join-code { font: 700 4em/1 var(--mono); letter-spacing: 0.08em; color: var(--accent); margin: 0.1em 0 0.4em; }
.join-count { color: var(--muted); min-height: 1.5em; }
.qa-screen { width: 100%; max-width: 56em; margin: 0 auto; }
.qa-big { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.6em; }
.qa-big li { display: flex; align-items: center; gap: 1em; padding: 0.7em 1em; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); font-size: 1.2em; }
.qa-big li p { margin: 0; flex: 1; overflow-wrap: anywhere; }
.qa-big li.answered { opacity: 0.5; }
.qa-big .votes { font: 700 0.9em var(--mono); color: var(--accent); min-width: 3.5em; }
.qa-big .qa-actions { display: flex; gap: 0.4em; font-size: 0.7em; opacity: 0; transition: opacity 0.15s; }
.qa-big li:hover .qa-actions, .qa-big li:focus-within .qa-actions { opacity: 1; }
.qa-big .hidden-note { background: none; border: 0; font-size: 0.85em; justify-content: center; }
.controls { display: flex; align-items: center; gap: 6px; padding: 8px 14px; background: var(--surface); box-shadow: 0 -0.125rem 0.25rem rgb(0 0 0 / 0.06); font-size: 15px; transition: opacity 0.4s, transform 0.4s; flex-wrap: wrap; }
body.idle .controls { opacity: 0; transform: translateY(100%); }
body.idle { cursor: none; }
.controls .sep { width: 1px; height: 22px; background: var(--line); margin: 0 6px; }
.controls select { max-width: 280px; padding: 6px 28px 6px 10px; }
.ctl { border: 1px solid var(--line); background: var(--surface); padding: 6px 12px; border-radius: 0.3rem; cursor: pointer; font-weight: 400; text-decoration: none; color: var(--nav); display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.ctl:hover:not(:disabled) { border-color: var(--muted); }
.ctl[aria-pressed="true"] { background: var(--primary); border-color: var(--primary); color: var(--primary-ink); }
.ctl:disabled { opacity: 0.4; cursor: default; }
#prev, #next { font-size: 1.25em; line-height: 1; padding: 4px 12px; }
@media (max-width: 720px) {
  /* presenter remote on a phone */
  .stage { font-size: 15px; }
  .stage-main { padding: 1em; }
  .join-chip span { display: none; }
  .join-screen { gap: 1.5em; }
  .qr-big { width: 70vw; }
  body.idle .controls { opacity: 1; transform: none; }
  .controls .sep, #fs { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* Dashboard and editor sit on the grey band so white cards read like swystems.usi.ch news cards. */
body:has(> .page) { background: var(--band); }

/* ---------- math ---------- */
.katex { font-size: 1.1em; }
/* Long display formulas scroll sideways instead of blowing out a phone layout. */
.katex-display { overflow-x: auto; overflow-y: hidden; padding: 0.1em 0; margin: 0.4em 0; }
/* Inside labels, options and answers a $$…$$ is still part of a line item: keep it left-aligned. */
.bar-label .katex-display, .choice .katex-display, .options-preview .katex-display, .wall .katex-display, .qa-list .katex-display, .qa-big .katex-display, .tex-preview li .katex-display { margin: 0.1em 0; text-align: left; }
.bar-label .katex-display > .katex, .choice .katex-display > .katex, .options-preview .katex-display > .katex, .wall .katex-display > .katex, .qa-list .katex-display > .katex, .qa-big .katex-display > .katex, .tex-preview li .katex-display > .katex { text-align: left; }
.math-glue { white-space: nowrap; }
.tex-preview { border-top: 1px dashed var(--line); padding-top: 10px; display: grid; gap: 6px; color: var(--ink-2); }
.tex-preview .tp-prompt { font-weight: 700; color: var(--heading); }
.tex-preview ol { margin: 0; padding-left: 1.4em; }