:root {
  --bg: #0f0f1e;
  --bg-2: #1a1a2e;
  --fg: #f3f3f9;
  --muted: #9999b3;
  --primary: #7c3aed;
  --primary-2: #a78bfa;
  --danger: #ef4444;
  --success: #22c55e;
  --warning: #f59e0b;
  --c1: #e21b3c;
  --c2: #1368ce;
  --c3: #d89e00;
  --c4: #26890c;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --max: 1100px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 20% -10%, rgba(124,58,237,.25), transparent),
              radial-gradient(900px 500px at 90% 110%, rgba(34,197,94,.15), transparent),
              var(--bg);
  color: var(--fg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 28px;
  border-bottom: 1px solid rgba(255,255,255,.06);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 10;
  background: rgba(15,15,30,.7);
}
.topbar nav a { margin-left: 22px; font-weight: 600; color: var(--fg); opacity: .85; }
.topbar nav a:hover { opacity: 1; }
.logo {
  font-weight: 800;
  font-size: 1.4rem;
  background: linear-gradient(90deg, var(--primary-2), var(--success));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.main { max-width: var(--max); margin: 0 auto; padding: 36px 24px 80px; }

.hero { text-align: center; padding: 60px 0 30px; }
.hero h1 { font-size: clamp(2.4rem, 7vw, 4rem); margin: 0; }
.hero .lede { font-size: 1.15rem; color: var(--muted); }
.hero-actions { margin-top: 22px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.card {
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.06);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.card h3 { margin-top: 0; }
.muted { color: var(--muted); }
.error { color: var(--danger); margin-top: 8px; }

.btn {
  border: 0; border-radius: 999px; padding: 12px 22px;
  font-weight: 700; cursor: pointer; font-size: 1rem;
  display: inline-flex; align-items: center; gap: 8px;
  transition: transform .08s ease, opacity .15s ease;
  color: white;
}
.btn:active { transform: scale(.97); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primary { background: linear-gradient(135deg, var(--primary), var(--primary-2)); }
.btn.ghost {
  background: transparent;
  border: 1px solid rgba(255,255,255,.18);
}
.btn.danger { background: var(--danger); }
.btn.big { padding: 16px 32px; font-size: 1.1rem; }

.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row.center { justify-content: center; margin-top: 22px; }
.center { text-align: center; }

.centerbox {
  display: grid; place-items: center; min-height: 70vh;
}
.form-card { width: min(420px, 100%); }
form label {
  display: flex; flex-direction: column; gap: 6px;
  margin-bottom: 14px; font-weight: 600;
}
form input, form textarea, form select {
  background: rgba(0,0,0,.3);
  border: 1px solid rgba(255,255,255,.12);
  color: var(--fg);
  padding: 12px 14px; border-radius: 10px;
  font-size: 1rem;
  font-family: inherit;
}
form input:focus, form textarea:focus {
  outline: 2px solid var(--primary-2);
  border-color: transparent;
}

.page-head {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px; margin-bottom: 20px;
}

/* Admin quizzes list */
.quiz-card { display: flex; flex-direction: column; gap: 10px; }
.quiz-card h3 { margin: 0; }
.quiz-card .actions { display: flex; gap: 8px; margin-top: 8px; }

/* Quiz editor */
dialog#quiz-editor {
  width: min(820px, calc(100% - 24px));
  max-height: 90vh;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius);
  background: var(--bg-2);
  color: var(--fg);
  padding: 22px;
}
dialog#quiz-editor::backdrop { background: rgba(0,0,0,.55); backdrop-filter: blur(2px); }

.question-block {
  border: 1px solid rgba(255,255,255,.08);
  padding: 14px; border-radius: 12px; margin: 10px 0;
  background: rgba(255,255,255,.02);
}
.question-block .qb-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 8px;
}
.answers-edit {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
}
.answer-edit { display: flex; gap: 6px; align-items: center; }
.answer-edit input[type="text"] { flex: 1; }

/* Lobby */
.lobby-head {
  display: flex; justify-content: space-between; align-items: center;
  gap: 16px; flex-wrap: wrap; margin-bottom: 22px;
}
.pin-box {
  background: white; color: #111;
  padding: 12px 22px; border-radius: 14px;
  text-align: center;
}
.pin-box .label { font-size: .8rem; color: #555; display: block; }
.pin-box .pin {
  font-size: clamp(2.4rem, 6vw, 3.6rem); font-weight: 800;
  letter-spacing: .08em;
}
.lobby-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 18px;
}
@media (max-width: 720px) {
  .lobby-grid { grid-template-columns: 1fr; }
}
.qr-card { display: grid; place-items: center; padding: 14px; background: white; }
.qr-card img { max-width: 100%; height: auto; image-rendering: pixelated; }
.player-list {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-wrap: wrap; gap: 8px;
}
.player-list li {
  background: rgba(124,58,237,.18);
  border: 1px solid rgba(124,58,237,.35);
  padding: 6px 12px; border-radius: 999px; font-weight: 600;
}
.player-list li.gone { opacity: .35; text-decoration: line-through; }

/* Stage */
.stage-head {
  display: flex; gap: 14px; align-items: center;
  margin-bottom: 14px;
}
.pill {
  background: rgba(255,255,255,.08); padding: 4px 10px;
  border-radius: 999px; font-size: .85rem; letter-spacing: .04em;
}
.timer {
  margin-left: auto; font-weight: 800; font-size: 1.5rem;
  background: var(--bg-2); padding: 6px 14px; border-radius: 12px;
  min-width: 64px; text-align: center;
}
.progress { color: var(--muted); }

.answers-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 20px 0;
}
@media (max-width: 500px) {
  .answers-grid { grid-template-columns: 1fr; }
}
.answer-tile {
  border: 0; cursor: pointer; color: white;
  padding: 24px; border-radius: var(--radius);
  font-size: 1.1rem; font-weight: 700; text-align: left;
  min-height: 110px; position: relative; overflow: hidden;
  transition: transform .12s ease, filter .15s ease, opacity .2s ease;
  box-shadow: var(--shadow);
}
.answer-tile:hover { transform: translateY(-2px); }
.answer-tile:disabled { cursor: not-allowed; }
.answer-tile.c0 { background: var(--c1); }
.answer-tile.c1 { background: var(--c2); }
.answer-tile.c2 { background: var(--c3); }
.answer-tile.c3 { background: var(--c4); }
.answer-tile.dimmed { filter: grayscale(.6) brightness(.6); }
.answer-tile.correct { outline: 4px solid var(--success); }
.answer-tile.incorrect { outline: 4px solid var(--danger); }
.answer-tile .symbol {
  display: inline-block; width: 28px; height: 28px;
  background: rgba(0,0,0,.25); border-radius: 6px;
  text-align: center; line-height: 28px; margin-right: 8px;
  font-weight: 900;
}

.host-tallies { margin-top: 18px; }
.tally-row { display: flex; align-items: center; gap: 10px; margin: 6px 0; }
.tally-row .bar {
  flex: 1; height: 14px; background: rgba(255,255,255,.08); border-radius: 999px; overflow: hidden;
}
.tally-row .bar > div {
  height: 100%; background: linear-gradient(90deg, var(--primary), var(--primary-2));
  transition: width .25s ease;
}
.tally-row .count { font-variant-numeric: tabular-nums; min-width: 32px; text-align: right; }

#leaderboard { padding-left: 1.4em; }
#leaderboard li { padding: 6px 0; font-size: 1.05rem; }
#leaderboard li .score { float: right; color: var(--primary-2); font-weight: 700; }

.player-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.player-body .answer-tile { font-size: 1.5rem; min-height: 120px; }

/* QR-scan join screen */
.scan-card { text-align: center; }
.scan-card h2 { margin-top: 0; }
.scan-card form { margin-top: 18px; }
.scan-card label { text-align: left; }

/* Stay-tuned waiting room */
.waiting-card {
  width: min(520px, 100%);
  text-align: center;
  padding: 28px 22px;
}
.waiting-card h2 {
  margin: 14px 0 6px;
  font-size: clamp(1.8rem, 5vw, 2.4rem);
  background: linear-gradient(90deg, var(--primary-2), var(--success));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.waiting-spinner {
  display: inline-flex; gap: 8px; margin-bottom: 4px;
}
.waiting-spinner span {
  width: 12px; height: 12px; border-radius: 999px;
  background: var(--primary-2);
  animation: waiting-bounce 1.2s infinite ease-in-out;
}
.waiting-spinner span:nth-child(2) { animation-delay: .15s; background: var(--primary); }
.waiting-spinner span:nth-child(3) { animation-delay: .3s; background: var(--success); }
@keyframes waiting-bounce {
  0%, 80%, 100% { transform: translateY(0); opacity: .55; }
  40% { transform: translateY(-8px); opacity: 1; }
}
.me-chip {
  display: inline-block;
  margin: 10px auto 18px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(124,58,237,.18);
  border: 1px solid rgba(124,58,237,.35);
  font-weight: 600;
}
.waiting-roster {
  margin-top: 18px;
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 16px;
  text-align: left;
}
.waiting-roster h3 {
  margin: 0 0 12px;
  font-size: 1rem;
  display: flex; align-items: center; gap: 8px;
  color: var(--muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.count-badge {
  background: var(--primary);
  color: white;
  border-radius: 999px;
  padding: 2px 10px;
  font-size: .8rem;
  font-weight: 700;
}
.waiting-roster .player-list { justify-content: center; }
.waiting-roster .player-list li.me {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  border-color: transparent;
}

/* Between-question transition */
#transition.centerbox { min-height: 80vh; }
.transition-card {
  text-align: center;
  padding: 40px 24px;
  width: min(560px, 100%);
  position: relative;
}
.transition-eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: .25em;
  font-weight: 700;
  color: var(--primary-2);
  opacity: 0;
  animation: transition-in .35s ease forwards;
}
.transition-title {
  margin: 12px 0 0;
  font-size: clamp(2rem, 7vw, 3.4rem);
  font-weight: 900;
  background: linear-gradient(90deg, var(--primary-2), var(--success));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  opacity: 0;
  animation: transition-in .5s .12s ease forwards;
}
.transition-pulse {
  margin: 28px auto 0;
  width: 80px; height: 80px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(167,139,250,.55), rgba(124,58,237,0) 70%);
  animation: transition-pulse 1.2s ease-in-out infinite;
}
@keyframes transition-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes transition-pulse {
  0%, 100% { transform: scale(.85); opacity: .55; }
  50% { transform: scale(1.15); opacity: 1; }
}