:root {
  --bg: #07070a;
  --panel: #0f1115;
  --accent: #0a84ff;
  --accent2: #00e0c6;
  --danger: #ff4d4f;
  --light: #e9eef6;
}

* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  background: linear-gradient(180deg, #020204, #0b0b0f);
  color: var(--light);
  direction: rtl;
}

#menuBtn {
  position: fixed;
  top: 14px;
  left: 14px;
  padding: 10px 12px;
  font-size: 20px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  z-index: 80;
}
#sideMenu {
  position: fixed;
  top: 0;
  right: -500px;
  width: 474px;
  height: 100%;
  background: linear-gradient(180deg, #0b0b0f, #070708);
  padding: 18px;
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.7);
  transition: right 0.36s;
  z-index: 90;
  opacity: 0.9;
}

@media (max-width: 480px) {
  #sideMenu.open {
    right: 0;
  }
}

@media (min-width: 481px) and (max-width: 768px) {
  #sideMenu.open {
    right: 0;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  #sideMenu.open {
    right: 23%;
  }
}

@media (min-width: 1025px) {
  #sideMenu.open {
    right: 37%;
  }
}

.menuHeader {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
#sideMenu h2 {
  margin: 0;
  color: var(--accent2);
}
#closeMenu {
  background: transparent;
  border: none;
  color: var(--light);
  font-size: 18px;
  cursor: pointer;
}

.menuSection {
  display: flex;
  flex-direction: column;
  align-items: start;
  justify-content: center;
  margin-top: 14px;
}
.primary {
  background: linear-gradient(90deg, var(--accent2), var(--accent));
  border: none;
  padding: 10px 12px;
  border-radius: 10px;
  color: #021;
  cursor: pointer;
  font-weight: 700;
}
.ghost {
  background: #1b1b1d;
  border: none;
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--light);
  cursor: pointer;
}

.carList {
  display: flex;
  gap: 2px;
  margin-top: 10px;
  flex-wrap: wrap;
}
.carItem {
  width: 86px;
  background: #0d0d0f;
  padding: 8px;
  border-radius: 10px;
  cursor: pointer;
  text-align: center;
  border: 2px solid transparent;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.carItem.selected {
  border-color: rgba(10, 132, 255, 0.35);
  box-shadow: 0 8px 24px rgba(10, 132, 255, 0.06);
}
.carItem img {
  width: 70px;
  height: 40px;
  object-fit: contain;
  border-radius: 6px;
}
.carName {
  font-size: 12px;
  margin-top: 6px;
  color: #cfeef0;
}

.frame {
  max-width: 480px;
  margin: 42px auto;
  padding: 12px;
  background: linear-gradient(180deg, #0e1116, #07080a);
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.03);
  box-shadow: 0 14px 50px rgba(0, 0, 0, 0.6);
}
.hud {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.score {
  font-weight: 700;
}
.status {
  display: flex;
  gap: 12px;
  align-items: center;
}
.hearts {
  display: flex;
  gap: 6px;
}
.heart {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  background: #2b2b2b;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: #111;
}
.heart.full {
  background: var(--danger);
  color: #fff;
}
.nitroWrap {
  width: 140px;
}
.nitroBar {
  height: 10px;
  background: #232323;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.03);
}
.nitroFill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #ffcd3c, #ff3b30);
}

canvas {
  display: block;
  background: #222;
  border-radius: 10px;
  margin: 8px auto;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
}
.score-panel {
  margin-top: 10px;
  padding: 10px;
  background: #111;
  text-align: center;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.02);
}

.overlay {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.65);
  z-index: 95;
}
.overlay.show {
  display: flex;
}
.gameOverCard {
  background: linear-gradient(180deg, #121217, #0b0b0d);
  padding: 18px;
  border-radius: 12px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.03);
}

.touchNitro {
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(90deg, #ffcd3c, #ff3b30);
  display: none;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #121212;
  z-index: 80;
}
@media (max-width: 900px) {
  .touchNitro {
    display: flex;
  }
}
body.night {
  background: linear-gradient(180deg, #010204, #020204);
}
body.night canvas {
  background: linear-gradient(180deg, #05060a, #020204);
}

.mrg {
  margin-top: 20px;
}

.startGame {
  font-size: 20px;
  width: 100%;
}