:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #14141f;
  --bg-tertiary: #1e1e2e;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #606070;
  --accent: #00d4ff;
  --accent-secondary: #00ff88;
  --danger: #ff4466;
  --gold: #ffd700;
  --focus-ring: #00d4ff;
  --focus-glow: rgba(0, 212, 255, 0.4);
  --radius-md: 12px;
  --radius-sm: 8px;
}

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

html, body {
  width: 600px;
  height: 600px;
  overflow: hidden;
  background: #000;
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  -webkit-font-smoothing: antialiased;
}

#app { width: 100%; height: 100%; position: relative; }

.screen {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  display: flex;
  flex-direction: column;
  padding: 24px;
}

.screen.hidden { display: none; }

.focusable {
  transition: all 0.15s ease;
  border: 2px solid transparent;
  cursor: pointer;
  outline: none;
}

.focusable:focus {
  border-color: var(--focus-ring);
  box-shadow: 0 0 20px var(--focus-glow);
}

.hidden { display: none !important; }

/* ============ Home screen ============ */
.home-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
}

.title {
  font-size: 64px;
  font-weight: 800;
  letter-spacing: 8px;
  color: var(--accent);
  text-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
  line-height: 1;
}

.suit-row {
  display: flex;
  gap: 20px;
  margin: 4px 0 8px;
}

.suit-deco {
  font-size: 32px;
  color: var(--text-secondary);
}
.suit-deco.red { color: var(--danger); }

.subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  letter-spacing: 2px;
  margin-bottom: 28px;
}

.menu {
  display: flex;
  flex-direction: column;
  gap: 14px;
  width: 340px;
}

.menu-btn {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 4px;
  padding: 20px;
  border-radius: var(--radius-md);
  width: 100%;
  height: 88px;
  font-family: inherit;
}

.menu-btn.primary {
  background: linear-gradient(135deg, #003348, #001824);
  color: var(--accent);
}

.menu-btn.danger {
  color: var(--danger);
}

.menu-btn:focus { background: var(--bg-secondary); }
.menu-btn.primary:focus { background: linear-gradient(135deg, #004562, #002a3e); }

/* ============ Game screen ============ */
#game {
  padding: 16px;
  gap: 12px;
}

.hand-area {
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 0;
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.hand-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.hand-label {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--text-secondary);
}

.score {
  font-size: 36px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  min-width: 40px;
  text-align: right;
}
.score.bust { color: var(--danger); }
.score.bj { color: var(--gold); }

.cards {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  flex: 1;
  min-height: 0;
}

.card {
  width: 64px;
  height: 92px;
  background: #fafafa;
  color: #1a1a1a;
  border-radius: var(--radius-sm);
  position: relative;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.5);
  flex-shrink: 0;
}

.card.red { color: #c41e3a; }

.card-corner {
  position: absolute;
  top: 6px;
  left: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1;
}

.card-rank {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.card-suit-small {
  font-size: 14px;
  margin-top: 1px;
}

.card-center {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-suit-big {
  font-size: 38px;
  line-height: 1;
}

.card.back {
  background: linear-gradient(135deg, #1e3a5f 0%, #0a1a30 100%);
  border: 2px solid rgba(0, 212, 255, 0.3);
}

.card.back::after {
  content: '\2605';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: rgba(0, 212, 255, 0.55);
}

.actions {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}

.game-btn {
  flex: 1;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 4px;
  padding: 18px;
  border-radius: var(--radius-md);
  height: 88px;
  font-family: inherit;
}

.game-btn:focus { background: var(--bg-secondary); }

/* ============ Result screen ============ */
.result-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.result-label {
  font-size: 64px;
  font-weight: 800;
  letter-spacing: 8px;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}

.result-label.win {
  color: var(--accent-secondary);
  text-shadow: 0 0 30px rgba(0, 255, 136, 0.4);
}
.result-label.lose {
  color: var(--danger);
  text-shadow: 0 0 30px rgba(255, 68, 102, 0.4);
}
.result-label.push { color: var(--text-secondary); }
.result-label.blackjack {
  color: var(--gold);
  text-shadow: 0 0 30px rgba(255, 215, 0, 0.5);
  font-size: 52px;
}

.result-detail {
  font-size: 22px;
  color: var(--text-secondary);
  letter-spacing: 3px;
  font-weight: 600;
}

.streak {
  font-size: 16px;
  color: var(--accent);
  letter-spacing: 3px;
  font-weight: 700;
  min-height: 20px;
  margin-bottom: 12px;
}

.result-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 340px;
  margin-top: 12px;
}

/* ============ Stats screen ============ */
.stats-title {
  font-size: 36px;
  font-weight: 800;
  color: var(--accent);
  text-align: center;
  letter-spacing: 6px;
  margin-bottom: 24px;
}

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

.stat-card {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.stat-value {
  font-size: 48px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}
.stat-value.win { color: var(--accent-secondary); }
.stat-value.lose { color: var(--danger); }
.stat-value.push { color: var(--text-secondary); }

.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
  letter-spacing: 3px;
  font-weight: 700;
  text-align: center;
}

.stats-actions {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.stats-actions .menu-btn {
  flex: 1;
  font-size: 18px;
  height: 72px;
  letter-spacing: 3px;
}