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

body {
  background: #000;
  overflow: hidden;
  width: 100vw;
  height: 100vh;
  font-family: 'Segoe UI', system-ui, sans-serif;
}

#canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

#hud {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 10;
  transition: opacity 0.6s ease;
}

/* ── Weather bar ─────────────────────────────────────── */
#weather-bar {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  pointer-events: all;
}

.wx-btn {
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.7);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  backdrop-filter: blur(4px);
}

.wx-btn:hover {
  background: rgba(255,255,255,0.22);
  color: #fff;
}

.wx-btn.active {
  background: rgba(255,255,255,0.28);
  border-color: rgba(255,255,255,0.5);
  color: #fff;
}

/* ── Controls hint ───────────────────────────────────── */
#controls-hint {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.75rem;
  color: rgba(255,255,255,0.35);
  letter-spacing: 0.07em;
  white-space: nowrap;
}

/* ── Mobile controls overlay ─────────────────────────── */
#mobile-controls {
  position: absolute;
  inset: 0;
  pointer-events: none;
  display: none;
}

.mobile-btn {
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: rgba(255, 255, 255, 0.9);
  border-radius: 999px;
  padding: 10px 14px;
  font-size: 0.9rem;
  backdrop-filter: blur(8px);
  box-shadow: 0 0 12px rgba(0,0,0,0.6);
  cursor: pointer;
}

.mobile-btn.small {
  padding: 6px 10px;
  font-size: 0.8rem;
}

#mobile-steer {
  position: absolute;
  bottom: 24px;
  left: 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  pointer-events: all;
}

.mobile-middle-row {
  display: flex;
  gap: 6px;
  align-items: center;
}

#mobile-speed {
  position: absolute;
  bottom: 28px;
  right: 18px;
  display: flex;
  gap: 8px;
  pointer-events: all;
}

#mobile-top-right {
  position: absolute;
  top: 20px;
  right: 18px;
  display: flex;
  gap: 8px;
  pointer-events: all;
}

/* ── Start screen ───────────────────────────────────── */
#start-screen {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.4) 50%, transparent 100%);
  cursor: pointer;
  transition: opacity 0.8s ease;
}
#start-screen.hidden {
  pointer-events: none;
  opacity: 0;
}
#start-text {
  font-size: clamp(3rem, 12vw, 6rem);
  font-weight: 300;
  color: #fff;
  letter-spacing: 0.2em;
  text-shadow: 0 0 40px rgba(255,255,255,0.3);
  animation: start-pulse 2.5s ease-in-out infinite;
}
#start-sub {
  margin-top: 12px;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.3em;
}
@keyframes start-pulse {
  0%, 100% { opacity: 0.9; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.02); }
}

/* Show mobile controls and hide desktop hint on small screens */
@media (max-width: 900px) {
  #mobile-controls {
    display: block;
  }
  #controls-hint {
    display: none;
  }
}