/* ==========================================================
   Neon Beat: Synthwave Cyberpunk Rhythm Slicer Styles
   ========================================================== */

:root {
  --bg-dark: #05030a;
  --panel-bg: rgba(15, 10, 28, 0.85);
  --accent-cyan: #00f0ff;
  --accent-magenta: #ec4899;
  --accent-gold: #facc15;
  --accent-red: #ef4444;
  --accent-green: #10b981;
  --accent-purple: #a855f7;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border-glow: rgba(0, 240, 255, 0.25);
  --font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'Consolas', 'Courier New', monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
  -webkit-user-select: none;
}

body, html {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-family);
}

#gameContainer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 10px;
  background: radial-gradient(circle at 50% 40%, #1e1035 0%, #05030a 100%);
}

/* ==========================================
   TOP HEADER & HUD
   ========================================== */
.neon-header {
  width: 100%;
  max-width: 720px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 14px;
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glow);
  border-radius: 14px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
  z-index: 10;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.portal-back-btn {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  padding: 4px 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  transition: all 0.2s ease;
}

.portal-back-btn:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

.game-logo {
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.5px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hud-stats-group {
  display: flex;
  gap: 14px;
}

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

.hud-label {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hud-val {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 800;
}

.text-gold { color: var(--accent-gold); }
.text-cyan { color: var(--accent-cyan); }
.text-magenta { color: var(--accent-magenta); }
.text-green { color: var(--accent-green); }
.text-red { color: var(--accent-red); }

.header-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

.icon-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  color: white;
  padding: 5px 8px;
  font-size: 14px;
  cursor: pointer;
}

.lang-dropdown {
  background: #0f172a;
  border: 1px solid var(--border-glow);
  color: white;
  padding: 4px 6px;
  border-radius: 8px;
  font-size: 12px;
  outline: none;
}

/* ==========================================
   FEVER GAUGE BAR
   ========================================== */
.fever-gauge-track {
  width: 100%;
  max-width: 720px;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 6px;
}

.fever-gauge-fill {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-magenta), var(--accent-gold));
  transition: width 0.15s ease;
  box-shadow: 0 0 10px var(--accent-magenta);
}

/* ==========================================
   VIEW 1: TRACK SELECTION
   ========================================== */
.track-select-layout {
  width: 100%;
  max-width: 720px;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  margin-top: 10px;
  background: var(--panel-bg);
  border: 1px solid var(--border-glow);
  border-radius: 16px;
  padding: 16px;
  overflow-y: auto;
}

.track-select-header {
  text-align: center;
  margin-bottom: 14px;
}

.track-select-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--accent-cyan);
}

.track-select-desc {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.track-list-grid {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.track-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 12px 16px;
  transition: all 0.2s ease;
}

.track-card:hover {
  border-color: var(--accent-cyan);
  background: rgba(0, 240, 255, 0.08);
}

.track-info-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.track-badge {
  font-size: 11px;
  font-weight: 900;
  padding: 4px 8px;
  border-radius: 6px;
}

.track-title {
  font-size: 14px;
  font-weight: 800;
  color: white;
}

.track-meta {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

.track-info-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.track-best {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--accent-gold);
}

.btn-play-track {
  padding: 8px 16px;
  background: linear-gradient(135deg, var(--accent-cyan), #0284c7);
  color: black;
  border: none;
  border-radius: 8px;
  font-weight: 800;
  font-size: 12px;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 240, 255, 0.3);
}

/* ==========================================
   VIEW 2: GAMEPLAY HIGHWAY CANVAS
   ========================================== */
.gameplay-layout {
  width: 100%;
  max-width: 720px;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-top: 6px;
}

.canvas-box {
  position: relative;
  width: 100%;
  aspect-ratio: 68 / 54;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(0, 240, 255, 0.3);
  box-shadow: 0 0 35px rgba(236, 72, 153, 0.2);
}

#beatCanvas {
  width: 100%;
  height: 100%;
  cursor: crosshair;
  touch-action: none;
}

/* ==========================================
   MODALS & RESULTS
   ========================================== */
.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(5, 3, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}

.modal-content {
  background: rgba(15, 10, 28, 0.95);
  border: 1px solid var(--border-glow);
  border-radius: 20px;
  padding: 24px;
  max-width: 440px;
  width: 100%;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
}

.modal-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--accent-cyan);
  margin-bottom: 12px;
}

.grade-circle {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: 3px solid var(--accent-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px auto;
  box-shadow: 0 0 20px rgba(250, 204, 21, 0.4);
}

.grade-text {
  font-size: 28px;
  font-weight: 900;
  color: var(--accent-gold);
}

.stats-summary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 18px;
}

.stat-cell {
  background: rgba(255, 255, 255, 0.05);
  padding: 8px;
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
}

.stat-label {
  font-size: 11px;
  color: var(--text-muted);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
}

.modal-actions {
  display: flex;
  gap: 8px;
}

.primary-start-btn {
  flex: 1.2;
  padding: 10px;
  background: linear-gradient(135deg, var(--accent-cyan), #0284c7);
  color: black;
  border: none;
  border-radius: 10px;
  font-weight: 800;
  font-size: 12px;
  cursor: pointer;
}

.secondary-btn {
  flex: 1;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  padding: 10px;
  font-weight: 700;
  font-size: 12px;
  cursor: pointer;
}

/* Mobile Responsiveness */
@media (max-width: 640px) {
  .track-card {
    flex-direction: column;
    gap: 8px;
    align-items: flex-start;
  }
  .track-info-right {
    width: 100%;
    justify-content: space-between;
  }
  .hud-stats-group {
    gap: 8px;
  }
}