:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-playfield: #16213e;
  --accent: #e94560;
  --accent-glow: rgba(233, 69, 96, 0.4);
  --perfect: #ffd700;
  --good: #00e676;
  --miss: #ff1744;
  --text: #e0e0e0;
  --text-dim: #888;
  --border: #2a2a4a;
  --circle-size: 60px;
  --approach-size: 180px;
}

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

body {
  background: var(--bg-primary);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  min-height: 100vh;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px;
}

header {
  text-align: center;
  margin-bottom: 16px;
}

header h1 {
  font-size: 2rem;
  color: var(--accent);
  letter-spacing: 2px;
}

.subtitle {
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* Controls */
.controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

button {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
  padding: 8px 20px;
  border-radius: 6px;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.2s;
  font-weight: 600;
}

button:hover:not(:disabled) {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 15px var(--accent-glow);
}

button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

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

.btn-danger:hover:not(:disabled) {
  background: var(--miss);
  color: #fff;
  box-shadow: 0 0 15px rgba(255, 23, 68, 0.4);
}

.settings-inline {
  display: flex;
  gap: 12px;
  margin-left: auto;
  align-items: center;
}

.settings-inline label {
  color: var(--text-dim);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

.settings-inline select {
  background: var(--bg-secondary);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.85rem;
}

/* Fullscreen button */
#btn-fullscreen {
  font-size: 0.85rem;
  padding: 6px 14px;
}

/* Fullscreen playfield fills entire screen */
#playfield:fullscreen,
#playfield:-webkit-full-screen {
  width: 100vw;
  height: 100vh;
  border: none;
  border-radius: 0;
}

/* Playfield */
#playfield {
  position: relative;
  width: 100%;
  height: 500px;
  background: var(--bg-playfield);
  border: 2px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  cursor: crosshair;
  user-select: none;
  -webkit-user-select: none;
}

#playfield.miss-flash {
  border-color: var(--miss);
  box-shadow: inset 0 0 30px rgba(255, 23, 68, 0.15);
}

/* HUD */
.hud {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-around;
  padding: 10px 20px;
  background: rgba(0, 0, 0, 0.4);
  z-index: 10;
  pointer-events: none;
}

.hud-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hud-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--text-dim);
  letter-spacing: 1px;
}

.hud-value {
  font-size: 1.3rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  transition: transform 0.1s;
}

.hud-value.bump {
  transform: scale(1.3);
}

/* Game Overlay */
.game-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.6);
  z-index: 20;
}

.game-overlay.hidden {
  display: none;
}

.overlay-content {
  text-align: center;
  font-size: 1.2rem;
}

.overlay-content .final-score {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  margin: 8px 0;
}

.overlay-content .final-accuracy {
  font-size: 1.4rem;
  margin-bottom: 4px;
}

.overlay-content .final-breakdown {
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* Circles */
.circle-container {
  position: absolute;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 5;
}

.hit-circle {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent) 30%, rgba(233, 69, 96, 0.6));
  border: 3px solid #fff;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  color: #fff;
  text-shadow: 0 0 8px rgba(0, 0, 0, 0.8);
}

.approach-circle {
  width: var(--approach-size);
  height: var(--approach-size);
  border-radius: 50%;
  border: 3px solid rgba(255, 255, 255, 0.8);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: shrink var(--duration) linear forwards;
}

@keyframes shrink {
  from {
    width: var(--approach-size, 180px);
    height: var(--approach-size, 180px);
    border-color: rgba(255, 255, 255, 0.8);
  }
  70% {
    border-color: rgba(255, 215, 0, 0.8);
  }
  90% {
    border-color: rgba(255, 23, 68, 0.9);
  }
  to {
    width: var(--circle-size, 60px);
    height: var(--circle-size, 60px);
    border-color: rgba(255, 23, 68, 1);
  }
}

/* Hit Feedback */
.hit-burst {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: var(--circle-size);
  height: var(--circle-size);
  border-radius: 50%;
  animation: burst 0.4s ease-out forwards;
  pointer-events: none;
  z-index: 6;
}

.hit-burst.perfect {
  border: 3px solid var(--perfect);
  box-shadow: 0 0 20px var(--perfect);
}

.hit-burst.good {
  border: 3px solid var(--good);
  box-shadow: 0 0 20px var(--good);
}

@keyframes burst {
  from {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
  to {
    opacity: 0;
    transform: translate(-50%, -50%) scale(2.5);
  }
}

/* Score Popup */
.score-popup {
  position: absolute;
  transform: translate(-50%, -50%);
  font-weight: 700;
  font-size: 1.1rem;
  pointer-events: none;
  z-index: 15;
  animation: float-up 0.8s ease-out forwards;
  text-shadow: 0 0 6px rgba(0, 0, 0, 0.8);
}

.score-popup.perfect { color: var(--perfect); }
.score-popup.good { color: var(--good); }
.score-popup.miss { color: var(--miss); }

@keyframes float-up {
  from {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
  to {
    opacity: 0;
    transform: translate(-50%, calc(-50% - 60px));
  }
}

/* Miss fade */
.circle-container.missed .hit-circle {
  background: radial-gradient(circle, var(--miss) 30%, rgba(255, 23, 68, 0.4));
  animation: fade-out 0.3s ease-out forwards;
}

.circle-container.missed .approach-circle {
  display: none;
}

@keyframes fade-out {
  to { opacity: 0; transform: translate(-50%, -50%) scale(0.5); }
}

/* Click ripple */
.click-ripple {
  position: absolute;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.4);
  transform: translate(-50%, -50%);
  pointer-events: none;
  animation: ripple 0.4s ease-out forwards;
  z-index: 4;
}

@keyframes ripple {
  from { opacity: 1; transform: translate(-50%, -50%) scale(1); }
  to { opacity: 0; transform: translate(-50%, -50%) scale(3); }
}

/* History */
.history-section {
  margin-top: 24px;
}

.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.history-header h2 {
  font-size: 1.2rem;
}

#history-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

#history-table thead th {
  background: var(--bg-secondary);
  padding: 8px 10px;
  text-align: center;
  color: var(--text-dim);
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 1px;
  border-bottom: 2px solid var(--border);
}

#history-table tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}

#history-table tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}

#history-table tbody tr:hover {
  background: rgba(233, 69, 96, 0.05);
}

#history-table td {
  padding: 8px 10px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.accuracy-high { color: var(--good); }
.accuracy-mid { color: var(--perfect); }
.accuracy-low { color: var(--miss); }

.empty-msg {
  text-align: center;
  color: var(--text-dim);
  padding: 20px;
  font-style: italic;
}

.empty-msg.hidden {
  display: none;
}

#history-table.hidden {
  display: none;
}

/* Responsive */
@media (max-width: 768px) {
  #playfield { height: 400px; }
  .controls { flex-direction: column; align-items: stretch; }
  .settings-inline { margin-left: 0; justify-content: center; }
  .hud-value { font-size: 1rem; }
}