/* ===== APEX DRIVE — CSS ===== */
:root {
  --cyan: #00f5ff;
  --cyan-dark: #00b8cc;
  --red: #ff3b3b;
  --green: #39ff14;
  --orange: #ff9f00;
  --purple: #cc44ff;
  --bg: #060810;
  --bg2: #0d1120;
  --bg3: #141928;
  --text: #e0e8f0;
  --text-dim: #5a6a80;
  --border: rgba(0, 245, 255, 0.18);
  --glow: 0 0 20px rgba(0,245,255,0.4);
  --glow-sm: 0 0 8px rgba(0,245,255,0.3);
  --font-head: 'Orbitron', monospace;
  --font-body: 'Rajdhani', sans-serif;
}

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

html, body {
  width: 100%; height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  overflow: hidden;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

/* ===== SCREENS ===== */
.screen {
  position: fixed; inset: 0;
  display: none; flex-direction: column;
  align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity 0.3s;
}
.screen.active {
  display: flex;
  opacity: 1;
  pointer-events: all;
}

/* ===== BACKGROUND EFFECTS ===== */
.bg-grid {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(0,245,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,245,255,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  animation: grid-move 20s linear infinite;
}
@keyframes grid-move {
  from { background-position: 0 0; }
  to { background-position: 40px 40px; }
}
.scanlines {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: repeating-linear-gradient(0deg,
    transparent, transparent 3px,
    rgba(0,0,0,0.15) 3px, rgba(0,0,0,0.15) 4px);
}

/* ===== START SCREEN ===== */
.start-content {
  position: relative; z-index: 1;
  display: flex; flex-direction: column;
  align-items: center; gap: 40px;
}
.logo-block { text-align: center; }
.logo-eyebrow {
  font-family: var(--font-head);
  font-size: 11px; letter-spacing: 6px;
  color: var(--cyan); opacity: 0.7;
  margin-bottom: 8px;
}
.logo-title {
  font-family: var(--font-head);
  font-size: clamp(52px, 10vw, 96px);
  font-weight: 900; line-height: 1;
  color: #fff;
  text-shadow: 0 0 40px rgba(0,245,255,0.6), 0 0 80px rgba(0,245,255,0.3);
}
.logo-accent { color: var(--cyan); }
.logo-sub {
  font-family: var(--font-head);
  font-size: 13px; letter-spacing: 8px;
  color: var(--text-dim); margin-top: 10px;
}

.menu-panel { display: flex; flex-direction: column; gap: 12px; width: 280px; }

.menu-btn {
  font-family: var(--font-head); font-size: 14px; font-weight: 700;
  letter-spacing: 3px; padding: 14px 28px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text); cursor: pointer;
  transition: all 0.2s;
  display: flex; align-items: center; gap: 12px;
  justify-content: center;
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}
.menu-btn:hover {
  border-color: var(--cyan); color: var(--cyan);
  background: rgba(0,245,255,0.06);
  box-shadow: var(--glow-sm);
  transform: translateX(4px);
}
.menu-btn.primary {
  background: var(--cyan); color: var(--bg); border-color: var(--cyan);
  box-shadow: 0 0 24px rgba(0,245,255,0.5);
}
.menu-btn.primary:hover {
  background: #fff; color: var(--bg);
  box-shadow: 0 0 40px rgba(0,245,255,0.8);
  transform: translateX(0) scale(1.02);
}
.btn-icon { font-size: 16px; }

.start-footer {
  font-size: 12px; letter-spacing: 2px;
  color: var(--text-dim);
}

/* ===== SCREEN HEADER ===== */
.screen-header {
  position: relative; z-index: 1;
  display: flex; align-items: center; gap: 24px;
  width: 100%; max-width: 900px;
  padding: 32px 24px 16px;
}
.back-btn {
  font-family: var(--font-head); font-size: 12px;
  letter-spacing: 2px; padding: 8px 16px;
  background: transparent; border: 1px solid var(--border);
  color: var(--text-dim); cursor: pointer;
  transition: all 0.2s;
}
.back-btn:hover { color: var(--cyan); border-color: var(--cyan); }
.screen-title {
  font-family: var(--font-head); font-size: 24px;
  letter-spacing: 6px; color: var(--cyan);
}

/* ===== TRACK SELECT ===== */
#track-select-screen {
  justify-content: flex-start;
  overflow-y: auto;
}
.track-cards {
  position: relative; z-index: 1;
  display: flex; gap: 20px;
  padding: 0 24px;
  flex-wrap: wrap; justify-content: center;
}
.track-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  width: 260px; cursor: pointer;
  transition: all 0.2s;
  overflow: hidden;
}
.track-card:hover {
  border-color: var(--cyan);
  box-shadow: var(--glow);
  transform: translateY(-4px);
}
.track-preview {
  width: 100%; height: 140px;
  background: var(--bg3);
}
.track-info { padding: 16px; }
.track-name {
  font-family: var(--font-head); font-size: 16px;
  letter-spacing: 3px; margin-bottom: 6px;
}
.track-diff {
  font-size: 12px; letter-spacing: 2px; margin-bottom: 10px;
}
.track-diff.easy { color: var(--green); }
.track-diff.medium { color: var(--orange); }
.track-diff.hard { color: var(--red); }
.track-desc { font-size: 13px; color: var(--text-dim); line-height: 1.5; margin-bottom: 12px; }
.track-meta {
  display: flex; gap: 16px;
  font-size: 12px; color: var(--cyan); letter-spacing: 1px;
}

.difficulty-row {
  position: relative; z-index: 1;
  display: flex; align-items: center; gap: 16px;
  padding: 20px 24px;
}
.diff-label { font-family: var(--font-head); font-size: 12px; letter-spacing: 3px; color: var(--text-dim); }
.diff-btns { display: flex; gap: 8px; }
.diff-btn {
  font-family: var(--font-head); font-size: 11px;
  letter-spacing: 2px; padding: 8px 16px;
  background: transparent; border: 1px solid var(--border);
  color: var(--text-dim); cursor: pointer; transition: all 0.2s;
}
.diff-btn.active { border-color: var(--cyan); color: var(--cyan); background: rgba(0,245,255,0.08); }
.diff-btn:hover:not(.active) { border-color: var(--text-dim); color: var(--text); }

/* ===== SETTINGS ===== */
#settings-screen { justify-content: flex-start; }
.settings-panel {
  position: relative; z-index: 1;
  width: 100%; max-width: 500px;
  padding: 20px 24px;
  display: flex; flex-direction: column; gap: 20px;
}
.setting-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  background: var(--bg2); border: 1px solid var(--border);
}
.setting-label { font-family: var(--font-head); font-size: 13px; letter-spacing: 3px; }
.toggle { position: relative; display: inline-block; width: 52px; height: 28px; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute; inset: 0; cursor: pointer;
  background: var(--bg3); border: 1px solid var(--border);
  transition: .3s;
}
.toggle-slider:before {
  content: ""; position: absolute;
  height: 20px; width: 20px;
  left: 3px; bottom: 3px;
  background: var(--text-dim);
  transition: .3s;
}
.toggle input:checked + .toggle-slider { background: rgba(0,245,255,0.1); border-color: var(--cyan); }
.toggle input:checked + .toggle-slider:before {
  transform: translateX(24px);
  background: var(--cyan);
  box-shadow: var(--glow-sm);
}
.text-input {
  background: var(--bg3); border: 1px solid var(--border);
  color: var(--text); padding: 8px 14px;
  font-family: var(--font-head); font-size: 14px;
  letter-spacing: 2px; outline: none;
  transition: border-color 0.2s;
}
.text-input:focus { border-color: var(--cyan); }
.text-input.wide { flex: 1; }
.color-picker { display: flex; gap: 10px; }
.color-opt {
  width: 28px; height: 28px; cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.2s; border-radius: 50%;
}
.color-opt.active { border-color: #fff; box-shadow: 0 0 8px currentColor; transform: scale(1.2); }

/* ===== LEADERBOARD ===== */
#leaderboard-screen { justify-content: flex-start; }
.lb-tabs {
  position: relative; z-index: 1;
  display: flex; gap: 0;
  width: 100%; max-width: 600px; padding: 0 24px;
}
.lb-tab {
  font-family: var(--font-head); font-size: 12px; letter-spacing: 3px;
  padding: 10px 24px; background: transparent;
  border: 1px solid var(--border); color: var(--text-dim);
  cursor: pointer; transition: all 0.2s;
}
.lb-tab.active { border-color: var(--cyan); color: var(--cyan); background: rgba(0,245,255,0.08); }
.lb-table {
  position: relative; z-index: 1;
  width: 100%; max-width: 600px; padding: 0 24px;
  margin-top: 8px;
}
.lb-row {
  display: flex; align-items: center; gap: 16px;
  padding: 12px 16px; margin-bottom: 4px;
  background: var(--bg2); border: 1px solid var(--border);
  transition: all 0.2s;
}
.lb-row:hover { border-color: var(--border); background: var(--bg3); }
.lb-row.gold { border-color: #ffd700; }
.lb-row.silver { border-color: #c0c0c0; }
.lb-row.bronze { border-color: #cd7f32; }
.lb-rank { font-family: var(--font-head); font-size: 18px; font-weight: 900; min-width: 40px; }
.lb-rank.gold { color: #ffd700; }
.lb-rank.silver { color: #c0c0c0; }
.lb-rank.bronze { color: #cd7f32; }
.lb-name { flex: 1; font-size: 16px; font-weight: 600; letter-spacing: 1px; }
.lb-score { font-family: var(--font-head); font-size: 14px; color: var(--cyan); }
.lb-time { font-size: 13px; color: var(--text-dim); }
.lb-loading { text-align: center; padding: 40px; color: var(--text-dim); letter-spacing: 3px; }

/* ===== GAME SCREEN ===== */
#game-screen { overflow: hidden; }
#game-canvas {
  display: block;
  width: 100vw; height: 100vh;
}

/* ===== HUD ===== */
#hud {
  position: fixed; top: 0; left: 0; right: 0;
  display: flex; align-items: flex-start; justify-content: space-between;
  padding: 12px 16px; z-index: 100;
  pointer-events: none;
  background: linear-gradient(to bottom, rgba(6,8,16,0.9) 0%, transparent 100%);
}
.hud-left, .hud-right {
  display: flex; gap: 16px; align-items: flex-start;
}
.hud-block {
  background: rgba(13,17,32,0.8); border: 1px solid var(--border);
  padding: 8px 14px; min-width: 60px; text-align: center;
}
.hud-label { font-family: var(--font-head); font-size: 9px; letter-spacing: 3px; color: var(--text-dim); margin-bottom: 2px; }
.hud-value { font-family: var(--font-head); font-size: 18px; font-weight: 700; color: var(--cyan); }
.hud-center { display: flex; flex-direction: column; align-items: center; }
.hud-timer {
  font-family: var(--font-head); font-size: 28px; font-weight: 700;
  color: #fff; text-shadow: 0 0 10px rgba(255,255,255,0.5);
  letter-spacing: 2px;
}
.hud-lap-best { font-family: var(--font-head); font-size: 11px; color: var(--text-dim); letter-spacing: 2px; margin-top: 2px; }

.speedometer { position: relative; display: flex; flex-direction: column; align-items: center; }
#speedometer-canvas { width: 80px; height: 80px; }
.speed-num {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -45%);
  font-family: var(--font-head); font-size: 20px; font-weight: 900;
  color: var(--cyan);
}
.speed-unit { font-family: var(--font-head); font-size: 9px; letter-spacing: 2px; color: var(--text-dim); margin-top: -4px; }
.nitro-bar-wrap { text-align: center; }
.nitro-bar {
  width: 80px; height: 8px;
  background: var(--bg3); border: 1px solid var(--border);
  margin-top: 4px; overflow: hidden;
}
.nitro-fill {
  height: 100%; width: 100%;
  background: linear-gradient(90deg, var(--cyan), #fff);
  box-shadow: 0 0 8px var(--cyan);
  transition: width 0.1s;
}

/* ===== PAUSE ===== */
#pause-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(6,8,16,0.85);
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(4px);
}
#pause-overlay.hidden { display: none; }
.pause-box {
  display: flex; flex-direction: column; gap: 12px; align-items: center;
  padding: 40px; background: var(--bg2);
  border: 1px solid var(--border);
  box-shadow: var(--glow); min-width: 280px;
}
.pause-title {
  font-family: var(--font-head); font-size: 36px;
  font-weight: 900; letter-spacing: 8px; color: var(--cyan);
  text-shadow: var(--glow-sm); margin-bottom: 16px;
}

#btn-pause-hud {
  position: fixed; top: 12px; right: 16px; z-index: 110;
  background: rgba(13,17,32,0.8); border: 1px solid var(--border);
  color: var(--text-dim); width: 36px; height: 36px;
  cursor: pointer; font-size: 16px;
  transition: all 0.2s;
}
#btn-pause-hud:hover { border-color: var(--cyan); color: var(--cyan); }

/* ===== COUNTDOWN ===== */
#countdown-overlay {
  position: fixed; inset: 0; z-index: 150;
  display: flex; align-items: center; justify-content: center;
  pointer-events: none;
}
#countdown-overlay.hidden { display: none; }
#countdown-num {
  font-family: var(--font-head); font-size: 120px; font-weight: 900;
  color: var(--cyan); text-shadow: 0 0 60px var(--cyan);
  animation: count-pulse 0.8s ease-out;
}
@keyframes count-pulse {
  0% { transform: scale(2); opacity: 0; }
  50% { transform: scale(1); opacity: 1; }
  100% { transform: scale(0.8); opacity: 0.8; }
}

/* ===== WRONG WAY ===== */
#wrong-way {
  position: fixed; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-head); font-size: 32px;
  font-weight: 900; letter-spacing: 4px;
  color: var(--red); z-index: 120;
  animation: wrong-blink 0.5s infinite;
  pointer-events: none;
}
#wrong-way.hidden { display: none; }
@keyframes wrong-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ===== TOUCH CONTROLS ===== */
#touch-controls {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  z-index: 110; display: none;
  flex-direction: column; align-items: center; gap: 4px;
}
@media (pointer: coarse) {
  #touch-controls { display: flex; }
}
.touch-row { display: flex; gap: 4px; justify-content: center; }
.touch-row-special { display: flex; gap: 20px; margin-top: 8px; }
.touch-btn {
  width: 56px; height: 56px;
  background: rgba(13,17,32,0.8); border: 1px solid var(--border);
  color: var(--text); font-size: 20px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 4px; cursor: pointer; active: { opacity: 0.6; };
  transition: all 0.1s;
  font-family: var(--font-head);
}
.touch-btn:active, .touch-btn.pressed {
  background: rgba(0,245,255,0.15);
  border-color: var(--cyan); color: var(--cyan);
}
.touch-btn.special {
  width: 80px; font-size: 11px; letter-spacing: 1px;
  background: rgba(13,17,32,0.9);
}
#tc-nitro:active, #tc-nitro.pressed { background: rgba(0,245,255,0.3); }
#tc-drift:active, #tc-drift.pressed { background: rgba(255,159,0,0.3); border-color: var(--orange); }

/* ===== GAME OVER SCREEN ===== */
.go-content {
  position: relative; z-index: 1;
  display: flex; flex-direction: column; align-items: center; gap: 24px;
  padding: 24px; max-width: 560px; width: 100%;
}
.go-result {
  font-family: var(--font-head); font-size: 36px;
  font-weight: 900; letter-spacing: 6px; color: var(--cyan);
  text-shadow: var(--glow);
}
.go-position {
  font-family: var(--font-head); font-size: 48px;
  font-weight: 900;
}
.go-stats {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 12px; width: 100%;
}
.go-stat {
  background: var(--bg2); border: 1px solid var(--border);
  padding: 16px; text-align: center;
}
.go-stat-label { font-family: var(--font-head); font-size: 10px; letter-spacing: 3px; color: var(--text-dim); margin-bottom: 6px; }
.go-stat-val { font-family: var(--font-head); font-size: 22px; font-weight: 700; color: var(--cyan); }
.go-name-row { display: flex; gap: 12px; width: 100%; }
.go-saved-msg {
  font-family: var(--font-head); font-size: 13px;
  letter-spacing: 3px; color: var(--green);
}
.go-saved-msg.hidden { display: none; }
.go-actions { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

/* ===== MISC ===== */
.hidden { display: none !important; }

/* ===== NITRO FLASH ===== */
#nitro-flash {
  position: fixed; inset: 0; z-index: 130;
  pointer-events: none;
  background: radial-gradient(ellipse at center, rgba(0,245,255,0.15) 0%, transparent 70%);
  opacity: 0; transition: opacity 0.1s;
}
#nitro-flash.active { opacity: 1; }

/* ===== POSITION POPUP ===== */
#pos-popup {
  position: fixed; top: 40%; left: 50%; transform: translateX(-50%);
  z-index: 120; pointer-events: none;
  font-family: var(--font-head); font-size: 48px; font-weight: 900;
  color: var(--cyan); text-shadow: var(--glow);
  opacity: 0; transition: opacity 0.5s;
}
#pos-popup.show { opacity: 1; }

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
  .track-cards { flex-direction: column; align-items: center; }
  .go-stats { grid-template-columns: 1fr; }
  .go-name-row { flex-direction: column; }
  #hud { padding: 8px; }
  .hud-timer { font-size: 20px; }
}