:root {
  --bg: #0a0e1a;
  --bg-raised: #0f1526;
  --panel: #121a2e;
  --panel-border: #223055;
  --border-soft: #1c2740;
  --text: #e7ecf6;
  --text-dim: #8993ad;
  --text-faint: #5c6785;
  --accent: #35e0c4;
  --accent-dim: #1e8f7d;
  --blue: #5b8def;
  --danger: #f0616b;
  --warning: #f0a94e;
  --success: #3fd17c;
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

body {
  background-image:
    radial-gradient(circle at 15% 0%, rgba(91, 141, 239, 0.08), transparent 40%),
    radial-gradient(circle at 85% 15%, rgba(53, 224, 196, 0.06), transparent 45%);
}

.app-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-soft);
  margin-bottom: 8px;
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--blue));
  color: #06101a;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name { font-weight: 600; font-size: 14px; }
.brand-sub { font-size: 11px; color: var(--text-dim); letter-spacing: 0.02em; }

.screen { display: none; }
.screen-active { display: block; animation: fade-in 0.18s ease-out; }

@keyframes fade-in {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Buttons ---------- */

.btn {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.12s ease, border-color 0.12s ease, opacity 0.12s ease;
}

.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary {
  background: var(--accent);
  color: #052019;
}
.btn-primary:hover:not(:disabled) { background: #4cebce; }

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--panel-border);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.btn-link {
  background: transparent;
  color: var(--text-dim);
  border: none;
  padding: 8px 4px;
  font-weight: 500;
}
.btn-link:hover { color: var(--text); }

.btn-small { padding: 8px 14px; font-size: 12px; }
.btn-wide { width: 100%; }

/* ---------- Start screen ---------- */

.hero { padding: 56px 0 28px; text-align: center; }

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.hero h1 {
  font-size: 44px;
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}

.hero-copy {
  max-width: 560px;
  margin: 0 auto;
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.6;
}

.mode-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 32px 0;
}

.mode-card {
  text-align: left;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color 0.15s ease, transform 0.15s ease;
  color: var(--text);
}

.mode-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.mode-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
}

.mode-title { font-size: 18px; font-weight: 600; }
.mode-desc { font-size: 13px; color: var(--text-dim); line-height: 1.5; }

.rules-strip {
  display: flex;
  justify-content: center;
  gap: 40px;
  padding: 20px 0 8px;
  border-top: 1px solid var(--border-soft);
}

.rule { display: flex; flex-direction: column; align-items: center; }
.rule-num { font-family: var(--font-mono); font-size: 20px; font-weight: 700; color: var(--accent); }
.rule-label { font-size: 11px; color: var(--text-dim); margin-top: 2px; }

/* ---------- Setup / pass-device cards ---------- */

.setup-card, .pass-card {
  max-width: 420px;
  margin: 64px auto;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
}

.setup-card h2, .pass-card h2 { margin: 6px 0 20px; font-size: 22px; }

.field-label {
  display: block;
  text-align: left;
  font-size: 12px;
  color: var(--text-dim);
  margin: 14px 0 6px;
}

.field-input {
  width: 100%;
  background: var(--bg-raised);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  padding: 11px 12px;
  color: var(--text);
  font-size: 14px;
  font-family: var(--font-sans);
}

.field-input:focus { outline: none; border-color: var(--accent); }

.setup-card .btn-primary, .pass-card .btn-primary {
  width: 100%;
  margin-top: 22px;
}

.setup-card .btn-link { margin-top: 6px; }

.pass-copy { color: var(--text-dim); font-size: 13px; line-height: 1.5; margin-bottom: 4px; }

/* ---------- Play screen ---------- */

.play-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0 16px;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

.play-who { font-size: 15px; font-weight: 600; }

.play-timer { text-align: right; }
.timer-label { display: block; font-size: 10px; color: var(--text-dim); letter-spacing: 0.06em; text-transform: uppercase; }
.timer-value {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--accent);
}
.timer-value.timer-critical { color: var(--danger); }

.dashboard {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  padding: 22px;
  margin-bottom: 24px;
}

.dash-kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blue);
}

.dash-title-block h3 {
  margin: 6px 0 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-dim);
  line-height: 1.5;
}

.stat-strip {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
  margin: 20px 0;
}

.stat {
  background: var(--bg-raised);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 12px 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-value { font-family: var(--font-mono); font-size: 18px; font-weight: 700; }
.stat-label { font-size: 10.5px; color: var(--text-dim); }
.stat-warning { color: var(--warning); }
.stat-success { color: var(--success); }
.stat-danger { color: var(--danger); }

.panel-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.panel {
  background: var(--bg-raised);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 16px;
}

.panel-title {
  display: block;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 10px;
  font-family: var(--font-mono);
}

.timeline { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 7px; }
.timeline li { display: flex; align-items: baseline; gap: 10px; font-size: 12.5px; }
.t-time { font-family: var(--font-mono); color: var(--text-faint); width: 40px; flex-shrink: 0; }
.t-who { width: 90px; flex-shrink: 0; color: var(--text-dim); }
.t-action { color: var(--text); }
.t-flag { color: var(--warning); }
.t-danger { color: var(--danger); font-weight: 600; }
.t-success { color: var(--success); }

.alerts { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.alert { display: flex; gap: 10px; align-items: flex-start; font-size: 12.5px; }
.alert-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  flex-shrink: 0;
  margin-top: 1px;
}
.alert-high .alert-badge { background: rgba(240, 97, 107, 0.15); color: var(--danger); }
.alert-medium .alert-badge { background: rgba(240, 169, 78, 0.15); color: var(--warning); }
.alert-low .alert-badge { background: rgba(63, 209, 124, 0.15); color: var(--success); }
.alert-body { color: var(--text-dim); line-height: 1.5; }
.alert-body strong { color: var(--text); }

.email-analysis { margin: 0; font-size: 12.5px; }
.email-analysis dt { color: var(--text-faint); font-family: var(--font-mono); font-size: 10.5px; text-transform: uppercase; margin-top: 10px; }
.email-analysis dt:first-child { margin-top: 0; }
.email-analysis dd { margin: 3px 0 0; color: var(--text); }

.bars { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.bars li { display: grid; grid-template-columns: 56px 1fr auto; align-items: center; gap: 10px; font-size: 12px; }
.bar-label { color: var(--text-dim); }
.bar-track { height: 7px; background: var(--panel-border); border-radius: 4px; overflow: hidden; }
.bar-fill { display: block; height: 100%; background: linear-gradient(90deg, var(--blue), var(--accent)); }
.bar-value { font-family: var(--font-mono); color: var(--text-dim); font-size: 11px; white-space: nowrap; }

/* ---------- Quiz ---------- */

.quiz { display: flex; flex-direction: column; gap: 14px; }

.question {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: 18px;
}

.question-head { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }

.question-num {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--bg-raised);
  border: 1px solid var(--panel-border);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  flex-shrink: 0;
}

.question-text { flex: 1; font-size: 14.5px; font-weight: 500; }
.question-pts { font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); flex-shrink: 0; }

.options { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }

.option-btn {
  text-align: left;
  background: var(--bg-raised);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.12s ease, background 0.12s ease;
}

.option-btn:hover { border-color: var(--blue); }

.option-btn.selected {
  border-color: var(--accent);
  background: rgba(53, 224, 196, 0.08);
}

.option-btn.correct {
  border-color: var(--success);
  background: rgba(63, 209, 124, 0.1);
}

.option-btn.incorrect {
  border-color: var(--danger);
  background: rgba(240, 97, 107, 0.1);
}

.submit-row { padding: 6px 0 24px; }

/* ---------- Results ---------- */

.results-card {
  max-width: 460px;
  margin: 48px auto;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
}

.results-card-wide { max-width: 720px; }

.results-card h2 { margin: 4px 0 4px; font-size: 22px; }

.score-total {
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  color: var(--accent);
  margin: 10px 0;
}

.score-breakdown {
  display: flex;
  justify-content: center;
  gap: 24px;
  font-size: 12.5px;
  color: var(--text-dim);
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-soft);
  margin-bottom: 18px;
}

.score-breakdown b { color: var(--text); font-family: var(--font-mono); }

.answer-review { display: flex; flex-direction: column; gap: 8px; text-align: left; margin-bottom: 8px; }

.review-row {
  display: flex;
  justify-content: space-between;
  font-size: 12.5px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  background: var(--bg-raised);
}

.review-row .review-mark { font-family: var(--font-mono); font-weight: 700; }
.review-row.right .review-mark { color: var(--success); }
.review-row.wrong .review-mark { color: var(--danger); }

.results-actions { display: flex; gap: 10px; justify-content: center; margin-top: 22px; }

/* ---------- Multiplayer standings ---------- */

.standings { display: flex; flex-direction: column; gap: 10px; margin: 20px 0; }

.standing-row {
  display: grid;
  grid-template-columns: 40px 1fr auto auto;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: var(--bg-raised);
  border: 1px solid var(--border-soft);
  text-align: left;
}

.standing-row.winner {
  border-color: var(--accent);
  background: rgba(53, 224, 196, 0.06);
}

.standing-rank { font-family: var(--font-mono); font-size: 18px; color: var(--text-faint); }
.standing-row.winner .standing-rank { color: var(--accent); }

.standing-name { font-weight: 600; font-size: 14.5px; }
.standing-tag { display: block; font-size: 11px; color: var(--accent); margin-top: 2px; }

.standing-score { font-family: var(--font-mono); font-size: 17px; font-weight: 700; text-align: right; }
.standing-time { font-family: var(--font-mono); font-size: 12px; color: var(--text-dim); text-align: right; }

/* ---------- Leaderboard ---------- */

.leaderboard-card {
  max-width: 640px;
  margin: 48px auto;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.leaderboard-card h2 { margin: 4px 0 20px; }

.leaderboard-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.leaderboard-table th {
  text-align: left;
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  border-bottom: 1px solid var(--border-soft);
  padding: 8px 6px;
  font-family: var(--font-mono);
}
.leaderboard-table td { padding: 10px 6px; border-bottom: 1px solid var(--border-soft); }
.leaderboard-table td:nth-child(1) { font-family: var(--font-mono); color: var(--text-faint); }
.leaderboard-table td:nth-child(4) { font-family: var(--font-mono); font-weight: 700; color: var(--accent); }
.leaderboard-table td:nth-child(5) { font-family: var(--font-mono); color: var(--text-dim); }

.leaderboard-empty { color: var(--text-dim); font-size: 13px; text-align: center; padding: 20px 0; }

@media (max-width: 760px) {
  .mode-grid { grid-template-columns: 1fr; }
  .panel-grid { grid-template-columns: 1fr; }
  .stat-strip { grid-template-columns: repeat(3, 1fr); }
  .options { grid-template-columns: 1fr; }
  .rules-strip { gap: 22px; }
  .hero h1 { font-size: 34px; }
}