:root {
  --bg: #090303;
  --fg: #ffe8e8;
  --accent: #ff2a1a; 
  --accent2: #ff5500; 
}

html, body {
  height: 100%;
  margin: 0;
  background: radial-gradient(1000px 600px at 50% 120%, #3a0a0a 0%, var(--bg) 62%);
  color: var(--fg);
  font-family: 'Orbitron', ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  overflow: hidden;
}

body.cursor-hidden, body.cursor-hidden * { cursor: none !important; }

canvas { display: block; }

#hud {
  position: fixed;
  top: 14px;
  left: 16px;
  z-index: 10;
  display: flex;
  gap: 14px;
  align-items: baseline;
  text-shadow: 0 0 6px var(--accent), 0 0 16px var(--accent2);
  font-weight: 700;
}

#score { font-size: 24px; letter-spacing: 1.2px; }

#speedometer {
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 132px;
  height: 132px;
  z-index: 12;
  pointer-events: none;
}
#speedometer .gauge {
  width: 100%;
  height: 100%;
  display: block;
  transform: rotate(-90deg);
  filter: drop-shadow(0 0 10px var(--accent)) drop-shadow(0 0 22px var(--accent2));
}
#speedometer .track {
  fill: none;
  stroke: rgba(255,255,255,0.12);
  stroke-width: 10;
}
#speedometer .bar {
  fill: none;
  stroke: var(--accent);
  stroke-width: 10;
  stroke-linecap: round;
  stroke-dasharray: 327; 
  stroke-dashoffset: 327;
}
#speedometer { position: fixed; }
#speedometer .readout {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  text-shadow: 0 0 8px var(--accent), 0 0 16px var(--accent2);
}
#speedometer .value {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  font-weight: 900;
}
#speedometer #speedNum { font-size: 28px; }
#speedometer .unit { font-size: 12px; opacity: 0.9; letter-spacing: 1px; }

#overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  background: rgba(5,5,10,0.6);
  z-index: 20;
  backdrop-filter: blur(2px);
}

#overlay.hidden { display: none; }

#overlay h1 {
  margin: 0 0 10px;
  font-size: 56px;
  letter-spacing: 3px;
  color: white;
  text-shadow: 0 0 10px var(--accent2), 0 0 24px var(--accent), 0 0 60px var(--accent2);
}

#overlay p { margin: 4px 0; opacity: 0.95; }
#overlay p.small { font-size: 14px; opacity: 0.8; }
#overlay p.score { font-size: 20px; font-weight: 800; text-shadow: 0 0 8px var(--accent); }

#menu {
  position: fixed;
  inset: 0;
  display: grid;
  place-content: center;
  pointer-events: auto;
  z-index: 30;
  padding: 0;
}

#menu .panel {
  min-width: 360px;
  padding: 18px 20px;
  text-align: center;
  background: rgba(12, 10, 16, 0.55);
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: 10px;
  box-shadow: 0 0 14px var(--accent2), inset 0 0 18px #f052;
  backdrop-filter: blur(4px) saturate(120%);
}

#menu h1 {
  margin: 0 0 2px;
  font-size: 22px;
  letter-spacing: 1.5px;
  text-shadow: 0 0 8px var(--accent2), 0 0 18px var(--accent);
}

#menu .tag { margin: 0 0 12px; opacity: 0.85; font-size: 12px; letter-spacing: 1px; }
#menu .row { display: flex; gap: 10px; align-items: center; justify-content: center; margin: 10px 0; }
#menu .row label { font-size: 13px; opacity: 0.95; }
#menu .row.track-scores span { font-weight: 800; text-shadow: 0 0 8px var(--accent); }
#menu .row.lanes span#laneCount { min-width: 24px; display: inline-block; font-weight: 700; text-shadow: 0 0 8px var(--accent); }

#menu .row select,
#menu .row .select,
#menu .row input[type="range"] {
  color: var(--fg);
  background: transparent;
  border: 1px solid rgba(255,255,255,0.25);
  padding: 6px 8px;
  border-radius: 6px;
  box-shadow: inset 0 0 8px #f062;
}

#menu .row.difficulty { flex-wrap: wrap; gap: 6px; }
#menu .row.difficulty label { display: inline-flex; align-items: center; gap: 6px; padding: 6px 10px; border: 1px solid rgba(255,255,255,0.22); border-radius: 999px; cursor: pointer; user-select: none; text-transform: uppercase; letter-spacing: 1px; font-size: 12px; }
#menu .row.difficulty label input { display: none; }
#menu .row.difficulty label:has(input:checked) {
  border-color: var(--accent);
  box-shadow: 0 0 10px var(--accent), inset 0 0 10px #f062;
}

input[type="range"] { accent-color: var(--accent); }
input[type="range"]::-webkit-slider-thumb { background: var(--accent); border: 1px solid #fff4; box-shadow: 0 0 10px var(--accent2); }
input[type="range"]::-webkit-slider-runnable-track { background: linear-gradient(90deg, #fff2, #0000); height: 4px; border-radius: 2px; }

.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

.dropdown { position: relative; width: 220px; }
.dropdown-btn {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between;
  color: var(--fg);
  background: transparent;
  border: 1px solid rgba(255,255,255,0.25);
  padding: 6px 10px;
  border-radius: 6px;
  box-shadow: inset 0 0 8px #f062;
  cursor: pointer;
}
.dropdown-btn .left { display: inline-flex; align-items: center; gap: 6px; }
.dropdown-btn .right { display: inline-flex; align-items: center; gap: 10px; }
.dropdown-btn .label { text-shadow: 0 0 8px var(--accent); }
.dropdown-btn .dur { font-size: 12px; opacity: 0.9; letter-spacing: 1px; }
.dropdown-list {
  position: absolute; left: 0; right: 0; top: calc(100% + 6px);
  list-style: none; margin: 0; padding: 6px;
  background: rgba(12,10,16,0.9);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 8px;
  box-shadow: 0 10px 24px #0008, 0 0 12px var(--accent2);
  display: none; z-index: 50;
}
.dropdown.open .dropdown-list { display: block; }
.dropdown-list li { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 8px 10px; border-radius: 6px; cursor: pointer; }
.dropdown-list li .left { display: inline-flex; align-items: center; gap: 6px; }

.dropdown-list li .dur { font-size: 12px; opacity: 0.9; letter-spacing: 1px; }
.dropdown-list li[aria-selected="true"],
.dropdown-list li:hover {
  background: #ffffff10;
  outline: 1px solid var(--accent);
  text-shadow: 0 0 8px var(--accent);
}
.dropdown-list li.active { background: #ffffff18; outline: 1px solid var(--accent2); }

.btn {
  color: var(--fg);
  background: transparent;
  border: 1px solid rgba(255,255,255,0.25);
  padding: 6px 10px;
  cursor: pointer;
  text-shadow: 0 0 8px var(--accent);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  border-radius: 6px;
}

a{
  color: var(--fg);
  text-decoration: none;
  border-bottom: 1px dashed rgba(255,255,255,0.3);
}
a:hover {
  border-bottom-style: solid;
  text-shadow: 0 0 8px var(--accent);
}

.btn.primary {
  border-color: var(--accent);
  box-shadow: 0 0 8px var(--accent), inset 0 0 8px #f062;
}

.hidden { display: none !important; }

.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 40;
  padding: 8px 12px;
  border: 1px solid rgba(255,255,255,0.25);
  background: rgba(10,10,20,0.55);
  box-shadow: 0 0 12px var(--accent), inset 0 0 8px #f062;
  text-shadow: 0 0 8px var(--accent);
  opacity: 1;
  transition: opacity 0.4s ease, transform 0.4s ease;
  pointer-events: none; 
}
.toast.hidden { opacity: 0; transform: translateX(-50%) translateY(10px); }

@keyframes toast-pop-bottom {
  0% { opacity: 0; transform: translate(-50%, 12px) scale(0.98); }
  60% { opacity: 1; transform: translate(-50%, -2px) scale(1.02); }
  100% { opacity: 1; transform: translate(-50%, 0) scale(1.0); }
}
.toast.show { animation: toast-pop-bottom 400ms ease-out; }