/* Tidbits Trivia — 90s sticker design system (web).
   Token parity with the Apple Design.swift palette. Mobile-first.
   Safari-safe: 100dvh flex column, inner scrollers, no position:fixed. */

:root {
  --color-bg: #FBF3E4;       /* warm cream paper */
  --color-bg-deep: #F3E7CE;
  --color-surface: #FFFFFF;
  --color-ink: #1A1714;
  --color-ink-soft: #6B6157;
  --color-border: #1A1714;
  --color-primary: #FF5C5C;  /* coral CTA */
  --color-accent: #2D5BFF;   /* blue interactive */
  --color-yellow: #FFC93C;
  --color-mint: #2FCB8A;
  --color-grape: #8B5CF6;
  --radius: 18px;
  --bw: 3px;
  --shadow: 5px;
  --pad: 16px;
  --font: ui-rounded, "SF Pro Rounded", "Hiragino Maru Gothic ProN", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  height: 100dvh;
  display: flex; flex-direction: column; overflow: hidden;
  font-family: var(--font); background: var(--color-bg); color: var(--color-ink);
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
#app { flex: 1; min-height: 0; display: flex; flex-direction: column; }

.muted { color: var(--color-ink-soft); }
.skip-link { position: absolute; left: -999px; }
.skip-link:focus { left: 8px; top: 8px; background: #fff; padding: 8px; z-index: 9; }

/* ---- Top bar / tabs ---- */
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 14px var(--pad) 8px; }
.brand { font-weight: 900; font-size: 28px; letter-spacing: 1px; }
.tabs { display: flex; gap: 6px; }
.tab { display: flex; align-items: center; gap: 6px; text-decoration: none; color: var(--color-ink);
  font-weight: 800; font-size: 14px; padding: 8px 12px; border-radius: 999px; border: 2.5px solid transparent; }
.tab.active { background: var(--color-surface); border-color: var(--color-border); }

.main { flex: 1; min-height: 0; overflow-y: auto; padding: 8px var(--pad) 40px; -webkit-overflow-scrolling: touch; }

.page-title { font-size: 30px; font-weight: 900; line-height: 1.1; margin: 10px 0 18px; }
.section { font-size: 20px; font-weight: 800; margin: 22px 0 12px; }

/* ---- Chunky card ---- */
.card {
  position: relative; background: var(--color-surface);
  border: var(--bw) solid var(--color-border); border-radius: var(--radius);
  box-shadow: var(--shadow) var(--shadow) 0 var(--color-border);
}
.card.pad { padding: 16px; }
.pad > * + * { margin-top: 12px; }

.banner { display: flex; align-items: center; justify-content: space-between; gap: 12px;
  width: 100%; text-align: left; padding: 18px; cursor: pointer; font: inherit; color: inherit;
  margin-bottom: 8px; }
.banner.daily { background: var(--color-yellow); }
.banner-title, .big { font-weight: 900; }
.banner-title { font-size: 20px; }
.big { font-size: 28px; } .big-sm { font-size: 22px; font-weight: 900; }
.chev { font-size: 28px; font-weight: 900; }

/* ---- Chips / mode picker ---- */
.chips { display: flex; gap: 10px; overflow-x: auto; padding-bottom: 6px; }
.chips.wrap { flex-wrap: wrap; overflow: visible; }
.chip { font: inherit; font-weight: 800; font-size: 15px; white-space: nowrap; cursor: pointer;
  padding: 10px 16px; border-radius: 999px; background: var(--color-surface);
  border: 2.5px solid var(--color-border); color: var(--color-ink); }
.chip.on { background: var(--color-accent); color: #fff; }

/* ---- Category grid ---- */
.cat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.cat-card { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; text-align: left;
  padding: 16px; min-height: 150px; cursor: pointer; font: inherit; color: inherit; }
.cat-icon { display: grid; place-items: center; width: 52px; height: 52px; border-radius: 999px;
  border: 2.5px solid var(--color-border); font-size: 26px; }
.cat-name { font-weight: 800; font-size: 18px; }
.cat-blurb { font-size: 13px; }

/* ---- Buttons ---- */
.btn { font: inherit; font-weight: 800; font-size: 18px; cursor: pointer; color: #fff;
  border: var(--bw) solid var(--color-border); border-radius: var(--radius);
  background: var(--color-primary); box-shadow: var(--shadow) var(--shadow) 0 var(--color-border);
  padding: 14px 18px; transition: transform .08s, box-shadow .08s; }
.btn:active { transform: translate(var(--shadow), var(--shadow)); box-shadow: 0 0 0 var(--color-border); }
.btn-full { display: block; width: 100%; margin-top: 12px; }
.btn-primary { background: var(--color-primary); }
.btn-blue { background: var(--color-accent); }
.btn-grape { background: var(--color-grape); }
.btn-ink { background: var(--color-ink); }
.btn-text { background: none; box-shadow: none; border-color: transparent; color: var(--color-ink-soft); }
.btn-text:active { transform: none; }

.input { width: 100%; font: inherit; font-size: 17px; padding: 14px; border-radius: 12px;
  border: 2.5px solid var(--color-border); background: var(--color-bg); }
.error { color: var(--color-ink); background: rgba(255,92,92,.25); border: 2.5px solid var(--color-border);
  border-radius: 12px; padding: 12px; font-size: 14px; }
.ans { color: var(--color-mint); font-weight: 700; font-size: 14px; }
.link { color: var(--color-accent); font-weight: 700; font-size: 14px; text-decoration: none; }

/* ---- Stats ---- */
.stat-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; margin-top: 12px; }
.stat { text-align: center; padding: 16px 6px; background: color-mix(in srgb, var(--tint) 18%, white); }
.stat-v { font-size: 24px; font-weight: 900; }
.stat-l { font-size: 11px; font-weight: 800; color: var(--color-ink-soft); text-transform: uppercase; }
.row { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px; margin-bottom: 14px; }

/* ---- Game ---- */
.game { flex: 1; min-height: 0; display: flex; flex-direction: column; padding: 10px var(--pad) 16px; }
.hud { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.x { font: inherit; font-weight: 900; font-size: 16px; width: 38px; height: 38px; border-radius: 999px;
  background: var(--color-surface); border: 2.5px solid var(--color-border); cursor: pointer; }
.pill { font-weight: 800; font-size: 15px; padding: 7px 12px; border-radius: 999px;
  border: 2.5px solid var(--color-border); background: var(--color-surface); }
.pill.score { background: var(--color-yellow); }
.pill.streak.hot { background: var(--color-primary); color: #fff; }
.clockbar { display: flex; align-items: center; gap: 10px; margin: 12px 0; font-weight: 800; font-size: 14px; }
.clock-track { flex: 1; height: 14px; background: var(--color-bg-deep); border: 2.5px solid var(--color-border);
  border-radius: 999px; overflow: hidden; }
.clock-fill { height: 100%; width: 100%; background: var(--color-accent); transition: width .1s linear; }
.clock-fill.urgent { background: var(--color-primary); }
.qwrap { flex: 1; min-height: 0; overflow-y: auto; }
.qcard { padding: 20px; margin-bottom: 18px; }
.qcat { font-size: 13px; font-weight: 800; margin-bottom: 8px; }
.qprompt { font-size: 22px; font-weight: 800; line-height: 1.25; }
.opts { display: flex; flex-direction: column; gap: 12px; }
.opt { font: inherit; font-weight: 800; font-size: 17px; text-align: left; cursor: pointer; color: var(--color-ink);
  padding: 16px; border-radius: 14px; background: var(--color-surface); border: 2.5px solid var(--color-border); }
.opt.correct { background: var(--color-mint); color: #fff; }
.opt.wrong { background: var(--color-primary); color: #fff; }
.opt.dim { opacity: .45; }
.reveal { margin-top: 16px; padding: 16px; background: var(--color-bg-deep); }
.reveal-h { font-weight: 800; font-size: 18px; margin-bottom: 8px; }
.reveal p { font-size: 16px; line-height: 1.4; margin-bottom: 8px; }

/* ---- Results ---- */
.results { flex: 1; min-height: 0; overflow-y: auto; padding: 20px var(--pad) 40px; }
.scorecard { text-align: center; padding: 26px 16px; margin-bottom: 16px;
  background: color-mix(in srgb, var(--tint) 18%, white); }
.huge { font-size: 60px; font-weight: 900; line-height: 1; margin: 6px 0; }
.grid-card { text-align: center; margin-top: 16px; }
.emoji { font-size: 26px; letter-spacing: 2px; word-break: break-word; }
.results .btn, .results .section { margin-top: 16px; }

/* ---- Misc ---- */
.center-screen { flex: 1; display: grid; place-content: center; gap: 16px; text-align: center; padding: 24px; }
.spinner { width: 44px; height: 44px; border: 5px solid var(--color-bg-deep); border-top-color: var(--color-ink);
  border-radius: 999px; margin: 0 auto; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.toast { position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%); z-index: 20;
  background: var(--color-ink); color: #fff; font-weight: 700; padding: 12px 18px; border-radius: 999px; }
.empty { text-align: center; }

/* ---- Native-app promotion (foot of home) ---- */
.apps-promo { margin: 30px 0 8px; }
.store-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px; }
.store-btn {
  display: flex; flex-direction: column; gap: 2px; text-decoration: none;
  color: var(--color-ink); background: var(--color-surface);
  border: var(--bw) solid var(--color-border); border-radius: var(--radius);
  box-shadow: var(--shadow) var(--shadow) 0 var(--color-border);
  padding: 12px 14px; font-size: 14px;
}
.store-btn b { font-size: 15px; font-weight: 800; }
.store-btn.soon { opacity: .6; box-shadow: none; cursor: default; }
.apps-foot { margin-top: 16px; font-size: 13px; text-align: center; }
.apps-foot a { color: var(--color-accent); }

/* ---- Larger screens ---- */
@media (min-width: 720px) {
  .main, .results, .game { max-width: 680px; margin: 0 auto; width: 100%; }
  .cat-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }