:root {
  --bg: #050508;
  --bg2: #0c0c14;
  --cyan: #00f0ff;
  --cyan-dim: #00a8b3;
  --purple: #a855f7;
  --purple-dim: #6b21a8;
  --pink: #ff2d95;
  --text: #e8e8f0;
  --muted: #8a8aa0;
  --ok: #22c55e;
  --bad: #ef4444;
  --card: #12121c;
  --border: #2a2a3a;
  --glow: 0 0 20px rgba(0, 240, 255, 0.25);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100%;
}
body {
  background:
    radial-gradient(ellipse at 20% 0%, rgba(168, 85, 247, 0.18), transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(0, 240, 255, 0.12), transparent 45%),
    var(--bg);
  min-height: 100vh;
}

a { color: var(--cyan); }

.wrap {
  max-width: 640px;
  margin: 0 auto;
  padding: 1rem 1rem 3rem;
}

.wrap-wide { max-width: 900px; }

header.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.logo {
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 1.05rem;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 0.75rem;
  font-size: 0.85rem;
}
.nav a:hover { color: var(--cyan); }

.banner {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.25), rgba(0, 240, 255, 0.15));
  border: 1px solid var(--border);
  border-left: 3px solid var(--cyan);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
  line-height: 1.4;
  box-shadow: var(--glow);
}
.banner strong { color: var(--cyan); }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  margin-bottom: 1rem;
}

h1, h2, h3 { margin: 0 0 0.75rem; }
h1 { font-size: 1.35rem; }
h2 { font-size: 1.1rem; color: var(--cyan); }
.muted { color: var(--muted); font-size: 0.9rem; }
.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}
.meta .pill {
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
}

label {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
input[type="text"], input[type="password"], input[type="email"] {
  width: 100%;
  padding: 0.75rem 0.9rem;
  margin-bottom: 0.9rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}
input:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 2px rgba(0, 240, 255, 0.2);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.1rem;
  border-radius: 8px;
  border: 1px solid transparent;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.08s, box-shadow 0.15s, background 0.15s;
}
.btn:active { transform: scale(0.98); }
.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--cyan-dim), var(--purple-dim));
  color: #fff;
  box-shadow: var(--glow);
}
.btn-primary:hover:not(:disabled) {
  box-shadow: 0 0 28px rgba(0, 240, 255, 0.4);
}
.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-danger {
  background: rgba(239, 68, 68, 0.2);
  border-color: var(--bad);
  color: #fecaca;
}
.btn-ok {
  background: rgba(34, 197, 94, 0.2);
  border-color: var(--ok);
  color: #bbf7d0;
}
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.75rem 0;
}

.choices {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.65rem;
  margin-top: 1rem;
}
@media (min-width: 480px) {
  .choices { grid-template-columns: 1fr 1fr; }
}

.choice {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  text-align: left;
  padding: 1rem;
  min-height: 4.5rem;
  background: var(--bg2);
  border: 2px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
}
.choice:hover:not(:disabled) {
  border-color: var(--cyan);
  box-shadow: var(--glow);
}
.choice:disabled { cursor: default; opacity: 0.85; }
.choice .letter {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  color: #050508;
  font-weight: 900;
}
.choice.selected {
  border-color: var(--cyan);
  background: rgba(0, 240, 255, 0.08);
}
.choice.correct {
  border-color: var(--ok);
  background: rgba(34, 197, 94, 0.15);
}
.choice.wrong {
  border-color: var(--bad);
  background: rgba(239, 68, 68, 0.12);
}

.question-text {
  font-size: 1.15rem;
  line-height: 1.45;
  margin: 0.5rem 0 0;
}

.status-idle, .waiting {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--muted);
}
.score-big {
  font-size: 2rem;
  font-weight: 800;
  color: var(--cyan);
}

.timer {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--pink);
}

.leaderboard {
  list-style: none;
  margin: 0;
  padding: 0;
}
.leaderboard li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 0.35rem;
}
.leaderboard li.top {
  background: linear-gradient(90deg, rgba(168, 85, 247, 0.25), rgba(0, 240, 255, 0.1));
  border: 1px solid var(--purple);
  box-shadow: 0 0 16px rgba(168, 85, 247, 0.2);
}
.leaderboard .rank {
  width: 2rem;
  font-weight: 800;
  color: var(--muted);
  text-align: center;
}
.leaderboard li.top .rank { color: var(--cyan); }
.leaderboard .name { flex: 1; font-weight: 600; }
.leaderboard .score { font-weight: 800; color: var(--cyan); }
.leaderboard .contact {
  font-size: 0.8rem;
  color: var(--muted);
  word-break: break-all;
}

.tallies {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  margin: 0.75rem 0;
}
.tally {
  text-align: center;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem;
}
.tally .n { font-size: 1.4rem; font-weight: 800; color: var(--cyan); }
.tally .l { font-size: 0.75rem; color: var(--muted); }

.hidden { display: none !important; }
.flash-ok { color: var(--ok); }
.flash-bad { color: var(--bad); }
.error { color: var(--bad); font-size: 0.9rem; margin: 0.5rem 0; }

.host-grid {
  display: grid;
  gap: 1rem;
}
@media (min-width: 720px) {
  .host-grid { grid-template-columns: 1fr 1fr; }
}

/* Auto-host */
.auto-host-card {
  border-color: rgba(0, 240, 255, 0.35);
  box-shadow: var(--glow);
  margin-bottom: 0.5rem;
}
.auto-host-card h2 {
  color: var(--cyan);
}
.auto-readout {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  word-break: break-word;
}

/* Schedule editor (host) */
.todo-badge {
  display: inline-block;
  background: #b8860b;
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.05rem 0.4rem;
  border-radius: 4px;
}
.sched-table { width: 100%; border-collapse: collapse; margin: 0.25rem 0 1rem; font-size: 0.9rem; }
.sched-table th, .sched-table td { text-align: left; padding: 0.3rem 0.4rem; border-bottom: 1px solid rgba(255,255,255,0.08); }
.sched-table input { width: 7rem; margin: 0; padding: 0.3rem 0.4rem; }
.sched-table tr.current td { background: rgba(80, 200, 120, 0.15); }
.final-banner { text-align: center; font-size: 1.4rem; font-weight: 800; margin-bottom: 0.75rem; }
select {
  padding: 0.6rem 0.7rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}
.btn-row input[type="text"] { margin-bottom: 0; }
.btn-row label { margin-bottom: 0; }