:root {
  --bg: #0e0f13;
  --panel: #151821;
  --text: #e6e6e6;
  --muted: #a9b0c3;
  --accent: #4da3ff;
  --good: #4fd1c5;
  --warn: #f6ad55;
  --danger: #fc8181;
  --brick1: #ff6b6b;
  --brick2: #ffd166;
  --brick3: #06d6a0;
  --brick4: #118ab2;
}

:root.light {
  --bg: #f7f8fb;
  --panel: #ffffff;
  --text: #1a202c;
  --muted: #4a5568;
  --accent: #2563eb;
  --good: #0ea5e9;
  --warn: #d97706;
  --danger: #dc2626;
  --brick1: #ef4444;
  --brick2: #f59e0b;
  --brick3: #10b981;
  --brick4: #3b82f6;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.4 system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, Noto Sans, "Apple Color Emoji", "Segoe UI Emoji";
}

#app {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  background: var(--panel);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.header .title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header .title h1 {
  margin: 0;
  font-size: 18px;
}

.badge {
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  color: var(--muted);
  font-size: 12px;
}

.controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.button {
  appearance: none;
  border: 1px solid rgba(255,255,255,0.12);
  background: transparent;
  color: var(--text);
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: color .15s ease, border-color .15s ease, background .15s ease, transform .05s ease;
}
.button:hover { border-color: var(--accent); color: var(--accent); }
.button.primary { background: var(--accent); color: white; border-color: var(--accent); }
.button.danger { background: var(--danger); color: white; border-color: var(--danger); }

.main {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 16px;
  padding: 16px;
}

@media (max-width: 1024px) {
  .main { grid-template-columns: 1fr; }
}

.sidebar {
  background: var(--panel);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  padding: 16px;
  display: grid;
  gap: 12px;
  height: fit-content;
}

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.stat {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 10px;
  padding: 10px 12px;
  transition: transform .15s ease;
}
.stat:hover { transform: translateY(-2px); }
.stat .label { color: var(--muted); font-size: 12px; }
.stat .value { font-size: 16px; margin-top: 4px; }

.tip {
  font-size: 12px;
  color: var(--muted);
}

/* UI/UX improvements */
.scene { position: relative; overflow: hidden; box-shadow: 0 10px 30px rgba(0,0,0,0.25); }
.hud .pill { background: rgba(0,0,0,0.45); border-color: rgba(255,255,255,0.25); }

.button { transition: color .15s ease, border-color .15s ease, background .15s ease, transform .05s ease; }
.button:active { transform: translateY(1px); }

.badge { border: 1px solid rgba(255,255,255,0.15); }

/* Status dot */
.status .dot::before { content: ""; display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; background: var(--muted); box-shadow: 0 0 0 2px rgba(0,0,0,0.2) inset; }
#statusVal[data-state="running"]::before { background: var(--good); }
#statusVal[data-state="paused"]::before { background: var(--warn); }

/* Power-up badges */
.powerup-badge { position: relative; padding-right: 10px; }
.powerup-badge .time { opacity: 0.7; margin-left: 6px; }
.powerup-badge.active { border-style: solid; border-color: rgba(255,255,255,0.25); box-shadow: 0 0 10px rgba(77,163,255,0.35); }

/* Touch controls: larger, hide on desktops with hover */
#touchControls .button { min-width: 64px; min-height: 44px; font-size: 16px; }
@media (hover: hover) and (pointer: fine) { #touchControls { display: none !important; } }

/* Overlays */
#pauseOverlay, #gameOverOverlay, #nameOverlay, #levelBanner { backdrop-filter: blur(6px); }

/* Scene container height */
#scene-container { height: 70vh; }

/* Sidebar readability */
.stat .value { font-size: 18px; }

.scene {
  background: var(--panel);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  position: relative;
  overflow: hidden;
}

#scene-container {
  width: 100%;
  height: 66vh;
  min-height: 420px;
}

.status {
  font-size: 12px;
  color: var(--muted);
}

.footer {
  display: grid;
  gap: 6px;
  padding: 12px 16px;
  background: var(--panel);
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer a { color: var(--accent); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.12);
}

.powerups {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.powerup-badge {
  font-size: 12px;
  background: rgba(255,255,255,0.08);
  border: 1px dashed rgba(255,255,255,0.16);
  border-radius: 999px;
  padding: 3px 8px;
}

.hud {
  position: absolute;
  top: 10px;
  left: 10px;
  right: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  pointer-events: none;
}
.hud .pill {
  pointer-events: auto;
  background: rgba(0,0,0,0.35);
  backdrop-filter: blur(6px);
  color: white;
  border: 1px solid rgba(255,255,255,0.2);
  padding: 6px 10px;
  border-radius: 999px;
}

.hidden { display: none !important; }

.level-banner {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  padding: 16px 22px;
  border-radius: 12px;
  background: rgba(0,0,0,0.5);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.2);
  font-weight: 600;
  animation: pop .25s ease;
}
@keyframes pop { from { transform: translate(-50%, -50%) scale(.95); opacity: .7; } to { transform: translate(-50%, -50%) scale(1); opacity: 1; } }

#countdown { font-size: 48px; font-weight: 800; padding: 20px 28px; }

#toasts { position: absolute; top: 12px; right: 12px; display: grid; gap: 6px; pointer-events: none; }
.toast { background: rgba(0,0,0,0.6); color: #fff; border: 1px solid rgba(255,255,255,0.2); padding: 8px 12px; border-radius: 8px; }
#pauseOverlay { font-size: 28px; }

.medal { margin-right: 6px; }
.medal.gold { color: #fbbf24; }
.medal.silver { color: #c0c0c0; }
.medal.bronze { color: #cd7f32; }

.leaderboard { display: grid; gap: 6px; }
.leaderboard ol { margin: 0; padding-left: 18px; }
.leaderboard .me { background: rgba(77,163,255,0.12); border: 1px solid rgba(77,163,255,0.25); border-radius: 6px; padding: 4px 6px; }
.leaderboard .header { display: flex; align-items: center; justify-content: space-between; font-size: 12px; color: var(--muted); }

/* Responsive layout */
@media (max-width: 900px) {
  .main { grid-template-columns: 1fr; }
  .sidebar { position: fixed; inset: 0 auto 0 0; width: 80vw; max-width: 360px; transform: translateX(-100%); transition: transform .25s ease; z-index: 20; overflow-y: auto; max-height: 100dvh; }
  .sidebar.open { transform: translateX(0); }
  .backdrop { position: fixed; inset: 0; background: rgba(0,0,0,0.45); z-index: 10; }
}

/* Improve scene touch behavior */
#scene-container { touch-action: none; overscroll-behavior: contain; height: 70dvh; }

/* Small-screen enhancements */
.controls::-webkit-scrollbar { display: none; }
@media (max-width: 720px) {
  .header { flex-direction: column; align-items: stretch; gap: 8px; }
  .controls { overflow-x: auto; white-space: nowrap; gap: 6px; padding-bottom: 4px; }
  .controls .button, .controls .toggle { font-size: 12px; padding: 6px 8px; }
  .main { gap: 10px; padding: 10px; }
  #scene-container { height: 60dvh; min-height: 300px; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 420px) {
  .stat-grid { grid-template-columns: 1fr; }
  .hud .pill { font-size: 12px; padding: 4px 8px; }
  #touchControls .button { min-width: 56px; font-size: 14px; }
}