:root {
  --bg: #0f0f13;
  --surface: #1a1a22;
  --border: #2a2a38;
  --text: #e8e8f0;
  --muted: #7878a0;
  --accent: #6c63ff;
  --accent-hover: #7c74ff;
  --green: #3ecf8e;
  --red: #f56565;
  --yellow: #f6c90e;
  --radius: 12px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 0 0 40px;
}

#app {
  width: 100%;
  max-width: 480px;
  padding: 0 16px;
}

.screen { display: none; flex-direction: column; gap: 16px; padding-top: 32px; }
.screen.active { display: flex; }

header {
  margin-bottom: 8px;
  position: relative;
}

h1 { font-size: 2rem; font-weight: 700; letter-spacing: -0.5px; }
h2 { font-size: 1.25rem; font-weight: 600; }
.subtitle { color: var(--muted); margin-top: 4px; }

.back-btn {
  color: var(--muted);
  cursor: pointer;
  font-size: 0.875rem;
  margin-bottom: 8px;
  display: inline-block;
}
.back-btn:hover { color: var(--text); }

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  font-weight: 600;
}

input[type="text"], input[type="number"] {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
  padding: 10px 14px;
  width: 100%;
  outline: none;
  transition: border-color 0.15s;
}
input[type="text"]:focus, input[type="number"]:focus {
  border-color: var(--accent);
}

/* Buttons */
.btn {
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 20px;
  transition: all 0.15s;
  text-align: center;
}
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); transform: translateY(-1px); }
.btn-secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-secondary:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }

.btn-cooperate {
  background: rgba(62, 207, 142, 0.15);
  border: 1px solid var(--green);
  color: var(--green);
  flex: 1;
  padding: 16px;
  font-size: 1rem;
}
.btn-cooperate:hover:not(:disabled) { background: rgba(62, 207, 142, 0.25); }
.btn-cooperate.selected { background: var(--green); color: #000; }

.btn-defect {
  background: rgba(245, 101, 101, 0.15);
  border: 1px solid var(--red);
  color: var(--red);
  flex: 1;
  padding: 16px;
  font-size: 1rem;
}
.btn-defect:hover:not(:disabled) { background: rgba(245, 101, 101, 0.25); }
.btn-defect.selected { background: var(--red); color: #fff; }

.btn-stag {
  background: rgba(246, 201, 14, 0.15);
  border: 1px solid var(--yellow);
  color: var(--yellow);
  flex: 1;
  padding: 16px;
  font-size: 1rem;
}
.btn-stag:hover:not(:disabled) { background: rgba(246, 201, 14, 0.25); }
.btn-stag.selected { background: var(--yellow); color: #000; }

.btn-hare {
  background: rgba(120, 120, 160, 0.15);
  border: 1px solid var(--muted);
  color: var(--muted);
  flex: 1;
  padding: 16px;
  font-size: 1rem;
}
.btn-hare:hover:not(:disabled) { background: rgba(120, 120, 160, 0.25); color: var(--text); }
.btn-hare.selected { background: var(--muted); color: #000; }

.sh-rules { display: flex; flex-direction: column; gap: 10px; }
.sh-option-info { display: flex; align-items: center; gap: 10px; font-size: 0.9rem; color: var(--muted); }
.sh-option-info strong { color: var(--text); }
.sh-icon { font-size: 1.4rem; }

.payoff-note { font-size: 0.75rem; color: var(--muted); margin-top: 6px; }

.hidden { display: none !important; }

/* Game select */
.game-select { display: flex; gap: 10px; flex-wrap: wrap; }
.game-btn {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 14px;
  text-align: left;
  transition: border-color 0.15s;
}
.game-btn.active { border-color: var(--accent); }
.game-btn:hover { border-color: var(--accent); }
.game-icon { font-size: 1.4rem; }
.game-label { font-size: 0.85rem; font-weight: 600; }
.game-desc { font-size: 0.75rem; color: var(--muted); }

/* Divider */
.divider {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  position: relative;
}
.divider::before, .divider::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 42%;
  height: 1px;
  background: var(--border);
}
.divider::before { left: 0; }
.divider::after { right: 0; }

/* Room code */
.room-code-display {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.room-code-label { color: var(--muted); font-size: 0.8rem; }
.room-code {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  flex: 1;
}
.copy-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.8rem;
  padding: 4px 10px;
}
.copy-btn:hover { color: var(--text); border-color: var(--text); }

/* Player list */
.player-list { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.player-list li {
  align-items: center;
  background: var(--bg);
  border-radius: 8px;
  display: flex;
  gap: 10px;
  padding: 10px 14px;
}
.player-avatar {
  background: var(--accent);
  border-radius: 50%;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  height: 32px;
  width: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.player-name { flex: 1; font-size: 0.95rem; }
.player-badge {
  font-size: 0.7rem;
  background: rgba(108, 99, 255, 0.2);
  color: var(--accent);
  border-radius: 4px;
  padding: 2px 6px;
}

/* Rules */
.rules { font-size: 0.875rem; line-height: 1.6; color: var(--muted); }
.rules strong { color: var(--text); }

/* Status */
.status-msg {
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
  padding: 8px;
}

/* Scores bar */
.scores-bar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  gap: 0;
  overflow: hidden;
}
.score-item {
  flex: 1;
  padding: 12px 16px;
  border-right: 1px solid var(--border);
  text-align: center;
}
.score-item:last-child { border-right: none; }
.score-name { font-size: 0.75rem; color: var(--muted); }
.score-value { font-size: 1.4rem; font-weight: 700; }
.score-item.me .score-name { color: var(--accent); }
.score-item.me .score-value { color: var(--accent); }

/* Round indicator */
.round-indicator {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 4px;
}

/* Decision */
.decision-prompt { font-size: 1rem; font-weight: 600; text-align: center; }
.decision-buttons { display: flex; gap: 12px; }

/* Payoff table */
.pd-matrix-hint { overflow-x: auto; }
.payoff-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}
.payoff-table th, .payoff-table td {
  border: 1px solid var(--border);
  padding: 6px 10px;
  text-align: center;
}
.payoff-table th { color: var(--muted); font-weight: 600; background: var(--bg); }

/* Slider */
.slider-row {
  align-items: center;
  display: flex;
  gap: 12px;
}
input[type="range"] {
  accent-color: var(--accent);
  flex: 1;
  height: 6px;
}
.pg-desc { color: var(--muted); font-size: 0.875rem; line-height: 1.5; }
.pg-preview {
  background: var(--bg);
  border-radius: 8px;
  font-size: 0.85rem;
  color: var(--muted);
  padding: 10px 14px;
  line-height: 1.7;
}

/* Decided bar */
.decided-bar {
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
}

/* Result screen */
#result-content { gap: 16px; }
.result-row {
  align-items: center;
  display: flex;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.result-row:last-child { border-bottom: none; }
.result-player { flex: 1; font-weight: 600; }
.result-decision {
  font-size: 0.85rem;
  padding: 4px 10px;
  border-radius: 6px;
}
.result-decision.cooperate { background: rgba(62,207,142,0.15); color: var(--green); }
.result-decision.defect { background: rgba(245,101,101,0.15); color: var(--red); }
.result-gain {
  font-size: 1.1rem;
  font-weight: 700;
  min-width: 40px;
  text-align: right;
  color: var(--green);
}

/* Final screen */
.podium { gap: 16px; }
.podium-entry {
  align-items: center;
  display: flex;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.podium-entry:last-child { border-bottom: none; }
.podium-rank {
  font-size: 1.4rem;
  width: 32px;
  text-align: center;
}
.podium-name { flex: 1; font-weight: 600; }
.podium-score { font-size: 1.2rem; font-weight: 700; }
.podium-entry.first .podium-score { color: var(--yellow); }
.podium-entry.second .podium-score { color: var(--muted); }

/* Toast */
.toast {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  bottom: 24px;
  color: var(--text);
  font-size: 0.9rem;
  left: 50%;
  max-width: 320px;
  padding: 12px 20px;
  position: fixed;
  transform: translateX(-50%);
  z-index: 100;
  animation: fadeIn 0.2s ease;
}
@keyframes fadeIn { from { opacity: 0; transform: translateX(-50%) translateY(8px); } to { opacity: 1; transform: translateX(-50%) translateY(0); } }

/* History mini chart */
.history-label { font-size: 0.8rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 8px; }
.history-dots { display: flex; gap: 6px; flex-wrap: wrap; }
.hdot {
  width: 28px; height: 28px;
  border-radius: 50%;
  font-size: 0.7rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hdot.c { background: rgba(62,207,142,0.2); color: var(--green); }
.hdot.d { background: rgba(245,101,101,0.2); color: var(--red); }
.hdot.n { background: rgba(108,99,255,0.2); color: var(--accent); }