@import url("https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Rajdhani:wght@400;600&display=swap");
:root {
  --red: #ff2222;
  --yellow: #ffcc00;
  --green: #00ff44;
  --accent: #00f5ff;
  --ui-bg: rgba(0, 0, 0, 0.7);
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  background: #000;
  font-family: "Rajdhani", sans-serif;
  overflow: hidden;
  user-select: none;
}
#game-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}
canvas {
  display: block;
  width: 100%;
  height: 100%;
}
#hud {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 14px 20px;
  pointer-events: none;
  z-index: 10;
}
.hud-panel {
  background: var(--ui-bg);
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 10px 18px;
  backdrop-filter: blur(6px);
  box-shadow: 0 0 18px rgba(0, 245, 255, 0.18);
}
.hud-label {
  font-family: "Orbitron", monospace;
  color: var(--accent);
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
}
.hud-value {
  font-family: "Orbitron", monospace;
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.1;
}
#signal-panel {
  position: absolute;
  top: 50%;
  right: 20px;
  transform: translateY(-50%);
  background: var(--ui-bg);
  border: 1px solid var(--accent);
  border-radius: 12px;
  padding: 14px 12px;
  z-index: 10;
  backdrop-filter: blur(6px);
}
.signal-label {
  font-family: "Orbitron", monospace;
  color: var(--accent);
  font-size: 9px;
  letter-spacing: 1.5px;
  text-align: center;
  margin-bottom: 8px;
}
.signal-box {
  width: 32px;
  background: #111;
  border-radius: 6px;
  border: 2px solid #333;
  padding: 5px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin: 0 auto;
}
.signal-light {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #1a1a1a;
  transition: background 0.3s, box-shadow 0.3s;
}
.signal-light.active-red {
  background: var(--red);
  box-shadow: 0 0 12px var(--red);
}
.signal-light.active-yellow {
  background: var(--yellow);
  box-shadow: 0 0 12px var(--yellow);
}
.signal-light.active-green {
  background: var(--green);
  box-shadow: 0 0 12px var(--green);
}
.timer-bar-wrap {
  margin-top: 8px;
  background: #1a1a1a;
  border-radius: 4px;
  height: 6px;
  overflow: hidden;
  border: 1px solid #333;
}
#timer-bar {
  height: 100%;
  border-radius: 4px;
  transition: width 0.2s linear, background 0.3s;
}
#timer-count {
  text-align: center;
  margin-top: 5px;
  font-family: "Orbitron", monospace;
  font-size: 11px;
  color: #fff;
}
#controls {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}
.ctrl-btn {
  font-family: "Orbitron", monospace;
  font-size: 11px;
  letter-spacing: 1px;
  padding: 8px 16px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--ui-bg);
  color: var(--accent);
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s;
}
.ctrl-btn:hover {
  background: rgba(0, 245, 255, 0.12);
  box-shadow: 0 0 10px rgba(0, 245, 255, 0.3);
}
#overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.82);
  z-index: 20;
  backdrop-filter: blur(4px);
}
#overlay h1 {
  font-family: "Orbitron", monospace;
  font-size: clamp(28px, 6vw, 60px);
  color: var(--accent);
  text-shadow: 0 0 30px var(--accent);
  letter-spacing: 4px;
  margin-bottom: 8px;
}
#overlay .sub {
  font-family: "Rajdhani", sans-serif;
  color: #aaa;
  font-size: 16px;
  letter-spacing: 2px;
  margin-bottom: 30px;
}
.stats-row {
  display: flex;
  gap: 30px;
  margin-bottom: 28px;
}
.stat-box {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(0, 245, 255, 0.3);
  border-radius: 8px;
  padding: 10px 18px;
  text-align: center;
}
.stat-val {
  font-family: "Orbitron", monospace;
  font-size: 22px;
  color: #fff;
}
.stat-lbl {
  font-size: 11px;
  color: #888;
  letter-spacing: 1px;
}
#start-btn {
  font-family: "Orbitron", monospace;
  font-size: 14px;
  letter-spacing: 3px;
  padding: 14px 40px;
  border: 2px solid var(--accent);
  border-radius: 8px;
  background: transparent;
  color: var(--accent);
  cursor: pointer;
  transition: all 0.2s;
  text-transform: uppercase;
}
#start-btn:hover {
  background: var(--accent);
  color: #000;
  box-shadow: 0 0 30px var(--accent);
}
#diff-badge {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  font-family: "Orbitron", monospace;
  font-size: 10px;
  letter-spacing: 2px;
  color: #ffcc00;
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid #ffcc00;
  border-radius: 20px;
  padding: 4px 14px;
  z-index: 10;
}
#collision-flash {
  position: absolute;
  inset: 0;
  background: rgba(255, 0, 0, 0);
  pointer-events: none;
  z-index: 15;
  transition: background 0.1s;
}