:root {
  --bg-primary: #0f1923;
  --bg-card: #1e3448;
  --accent-green: #00c853;
  --accent-blue: #2196f3;
  --accent-gold: #ffd740;
  --text-primary: #eef2f7;
  --text-muted: #5a7a96;
  --divider: #2a4a62;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --radius: 12px;
  --transition: 0.2s ease;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100dvh;
}

/* Back nav */
.back-link {
  color: var(--text-muted) !important;
  font-size: 0.85rem;
  font-weight: 600;
}

.back-link:hover {
  color: var(--text-primary) !important;
}

/* Header title */
.app-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, var(--accent-green), var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Game pills */
.game-pill {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--divider);
  border-radius: 20px;
  padding: 0.3rem 0.75rem;
  font-size: 0.75rem;
  color: #8ba3bc;
  white-space: nowrap;
}

.game-pill.won-left {
  border-color: var(--accent-green);
  color: var(--accent-green);
}

.game-pill.won-right {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

.game-pill.current {
  border-color: var(--accent-gold);
  color: var(--accent-gold);
}

/* Score area */
.score-area {
  display: flex;
  gap: 0;
  align-items: stretch;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.player-side {
  flex: 1;
  background: var(--bg-card);
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  user-select: none;
  -webkit-user-select: none;
  outline: none;
}

.player-side:hover {
  background: #24445e;
}

.player-side:active {
  transform: scale(0.97);
}

.player-side.winner {
  background: linear-gradient(135deg, rgba(0, 200, 83, 0.15), rgba(0, 200, 83, 0.05));
}

.player-side.match-over {
  pointer-events: none;
  opacity: 0.7;
}

/* jQuery tap flash animations */
.player-side.tap-flash-left {
  animation: tapFlashLeft 0.4s ease-out;
}

.player-side.tap-flash-right {
  animation: tapFlashRight 0.4s ease-out;
}

@keyframes tapFlashLeft {
  0% { background-color: rgba(0, 200, 83, 0.25); }
  100% { background-color: var(--bg-card); }
}

@keyframes tapFlashRight {
  0% { background-color: rgba(33, 150, 243, 0.25); }
  100% { background-color: var(--bg-card); }
}

/* Player name inputs — intentionally NOT using Bootstrap form-control to keep them small and not block clicks */
.player-name-wrapper {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.player-name-input {
  background: transparent;
  border: none;
  border-bottom: 1px dashed var(--text-muted);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 600;
  text-align: center;
  width: 130px;
  padding: 0.2rem 0.4rem;
}

.player-name-input:focus {
  border-bottom-color: var(--accent-blue);
  outline: none;
}

.player-name-input::placeholder {
  color: var(--text-muted);
}

.doubles-name-wrapper {
  margin-top: -0.25rem;
}

.doubles-name-wrapper[hidden] {
  display: none;
}

/* Serve indicator */
.serve-indicator {
  font-size: 1.1rem;
  color: var(--accent-gold);
  opacity: 0;
  transition: opacity var(--transition);
  line-height: 1;
  display: inline-block;
}

.serve-indicator.active {
  opacity: 1;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.9); }
}

/* Score numbers */
.player-side.left .score {
  color: var(--accent-green);
}

.player-side.right .score {
  color: var(--accent-blue);
}

.score {
  font-size: 5rem;
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}


.serve-court {
  font-size: 0.75rem;
  color: var(--text-muted);
  min-height: 1.2em;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Divider */
.divider {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3px;
  background: var(--divider);
  position: relative;
}

.divider .vs {
  position: absolute;
  background: var(--bg-primary);
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.5rem 0.25rem;
  letter-spacing: 0.05em;
}

/* History toggle open state */
#btn-toggle-history.open {
  border-radius: 0.375rem 0.375rem 0 0;
}

/* History panel */
.history-panel {
  background: var(--bg-card);
  border: 1px solid var(--divider);
  border-top: none;
  border-radius: 0 0 0.375rem 0.375rem;
  padding: 1rem;
}

.history-panel[hidden] {
  display: none;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
  max-height: 300px;
  overflow-y: auto;
}

.history-item {
  background: rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
}

.history-item .match-players {
  font-weight: 600;
}

.history-item .match-players .winner-name {
  color: var(--accent-green);
}

.history-item .match-scores {
  color: #8ba3bc;
  font-variant-numeric: tabular-nums;
}

.history-item .match-date {
  color: var(--text-muted);
  font-size: 0.7rem;
}

.history-empty {
  color: var(--text-muted);
  font-size: 0.8rem;
  text-align: center;
  padding: 1rem;
}

/* Overlay */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1050;
  backdrop-filter: blur(4px);
}

.overlay[hidden] {
  display: none;
}

.overlay-content {
  max-width: 400px;
  width: 90%;
}

.result-title {
  font-size: 1.5rem;
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Shuttle count */
.shuttle-count-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Timer overlay */
.timer-countdown {
  font-size: 5rem;
  font-weight: 800;
  color: var(--accent-gold);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

/* Advanced panel (faults/challenges) */
#advanced-panel .accordion-button {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted) !important;
  box-shadow: none !important;
}

#advanced-panel .accordion-button::after {
  filter: invert(0.6);
}

.adv-side-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.fault-btn {
  font-size: 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.challenge-indicator {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.challenge-btn:disabled {
  opacity: 0.4;
}

/* Player card in modal */
.player-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--divider);
}

/* Responsive */
@media (max-width: 575.98px) {
  .app-title {
    font-size: 1.2rem;
  }

  .score {
    font-size: 3.5rem;
  }

  .player-side {
    padding: 1rem 0.5rem;
  }

  .player-name-input {
    width: 100px;
    font-size: 0.8rem;
  }
}

@media (min-width: 768px) {
  .score {
    font-size: 7rem;
  }

  .player-side {
    padding: 2rem 1.5rem;
  }
}