:root {
  color-scheme: dark;
  --bg: #0b0d17;
  --panel: #15192a;
  --panel-2: #1b2034;
  --text: #f7f8fb;
  --muted: #a9b0c3;
  --line: rgba(255,255,255,0.10);
  --accent: #54b7ff;
  --accent-2: #7ed4ff;
  --danger: #ff5f6d;
  --shadow: 0 24px 70px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top, rgba(84,183,255,0.12), transparent 28rem),
    linear-gradient(180deg, #111426 0%, var(--bg) 58%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  min-height: 100vh;
  padding: 24px;
}

button { font: inherit; }

button:focus-visible {
  outline: 3px solid rgba(126, 212, 255, 0.8);
  outline-offset: 3px;
}

.app-shell {
  width: min(1120px, 100%);
  margin: 0 auto;
}

.topbar,
.leaderboard-card,
.dialog-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.topbar { margin-bottom: 18px; }

h1, h2, p { margin-top: 0; }

h1 {
  margin-bottom: 0;
  font-size: clamp(2rem, 5vw, 3.2rem);
  letter-spacing: -0.04em;
}

h2 {
  margin-bottom: 10px;
  letter-spacing: -0.025em;
}

.eyebrow {
  margin-bottom: 5px;
  color: var(--accent-2);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.game-card,
.leaderboard-card {
  background: linear-gradient(180deg, rgba(28,33,55,0.96), rgba(18,21,36,0.96));
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.game-card { overflow: hidden; }

.hud {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px solid var(--line);
}

.hud-item {
  padding: 14px 18px;
  text-align: center;
}

.hud-item + .hud-item { border-left: 1px solid var(--line); }

.hud-label {
  display: block;
  color: var(--muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 3px;
}

.hud strong {
  font-size: 1.25rem;
  font-variant-numeric: tabular-nums;
}

.canvas-wrap {
  position: relative;
  background: #080b14;
  aspect-ratio: 16 / 10;
  min-height: 320px;
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(5, 7, 14, 0.63);
  backdrop-filter: blur(6px);
}

.overlay.hidden { display: none; }

.overlay-panel {
  width: min(520px, 100%);
  text-align: center;
  background: rgba(20,24,41,0.94);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 22px;
  padding: 28px;
  box-shadow: 0 24px 50px rgba(0,0,0,0.35);
}

.overlay-panel p:not(.eyebrow) {
  color: var(--muted);
  line-height: 1.6;
}

.primary-button,
.ghost-button,
.icon-button,
.control-btn {
  border: 0;
  color: var(--text);
  cursor: pointer;
}

.primary-button {
  min-width: 160px;
  padding: 13px 20px;
  border-radius: 999px;
  background: linear-gradient(180deg, #65c4ff, #2d9ce4);
  color: #06101a;
  font-weight: 900;
  box-shadow: 0 10px 24px rgba(84,183,255,0.25);
}

.primary-button:hover { filter: brightness(1.06); }

.ghost-button {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--line);
}

.icon-button {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(255,255,255,0.07);
  font-size: 1.7rem;
}

.mobile-controls {
  display: none;
  grid-template-columns: repeat(3, 64px);
  grid-template-rows: repeat(2, 58px);
  justify-content: center;
  gap: 8px;
  padding: 16px;
  border-top: 1px solid var(--line);
  background: rgba(8,10,18,0.45);
}

.control-btn {
  border-radius: 16px;
  background: #252c47;
  border: 1px solid rgba(255,255,255,0.10);
  font-size: 1.2rem;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}

.control-btn.active { background: #3d83b5; }
.control-btn.up { grid-column: 2; grid-row: 1; }
.control-btn.left { grid-column: 1; grid-row: 2; }
.control-btn.down { grid-column: 2; grid-row: 2; }
.control-btn.right { grid-column: 3; grid-row: 2; }

.leaderboard-card {
  margin-top: 18px;
  padding: 18px 20px;
  align-items: flex-start;
}

.leaderboard-card h2 { margin-bottom: 0; }

#mis-leaderboard {
  min-width: min(520px, 100%);
  width: 100%;
}

dialog {
  width: min(620px, calc(100% - 30px));
  padding: 0;
  color: var(--text);
  background: #171b2c;
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
}

dialog::backdrop {
  background: rgba(5,7,14,0.74);
  backdrop-filter: blur(5px);
}

.dialog-content { padding: 24px; }
.dialog-content p { color: var(--muted); line-height: 1.65; }
.dialog-content strong { color: var(--text); }

@media (max-width: 760px) {
  body { padding: 12px; }
  .topbar { align-items: flex-end; }
  .ghost-button { white-space: nowrap; }
  .canvas-wrap { min-height: 280px; }
  .mobile-controls { display: grid; }
  .leaderboard-card { display: block; }
  #mis-leaderboard { margin-top: 16px; min-width: 0; }
}

@media (max-width: 460px) {
  .hud-item { padding: 11px 8px; }
  .hud strong { font-size: 1.05rem; }
  .overlay { padding: 14px; }
  .overlay-panel { padding: 20px; }
  .canvas-wrap { aspect-ratio: 1 / 1; }
}

.environment-picker {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,0.025);
}

.environment-picker h2 {
  margin: 0;
  font-size: 1.05rem;
}

.environment-options {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.environment-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 9px 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.11);
  background: #222941;
  color: var(--text);
  cursor: pointer;
  font-weight: 750;
}

.environment-btn:hover {
  background: #2a3350;
}

.environment-btn.active {
  border-color: rgba(126,212,255,0.8);
  background: rgba(84,183,255,0.16);
  box-shadow: inset 0 0 0 1px rgba(126,212,255,0.28);
}

.environment-icon {
  display: inline-grid;
  place-items: center;
  width: 26px;
  height: 26px;
  font-size: 1.15rem;
}

@media (max-width: 760px) {
  .environment-picker {
    display: block;
  }

  .environment-options {
    margin-top: 12px;
    justify-content: stretch;
  }

  .environment-btn {
    flex: 1 1 30%;
    justify-content: center;
  }
}

@media (max-width: 500px) {
  .environment-btn {
    flex: 1 1 100%;
  }
}

.setup-copy {
  min-width: 220px;
}

.player-name-field {
  display: grid;
  gap: 6px;
  margin-top: 10px;
}

.player-name-field span {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.player-name-field input {
  width: min(220px, 100%);
  min-height: 42px;
  padding: 9px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.14);
  background: #101525;
  color: var(--text);
  font: inherit;
  font-weight: 800;
  outline: none;
}

.player-name-field input:focus {
  border-color: rgba(126,212,255,0.9);
  box-shadow: 0 0 0 3px rgba(84,183,255,0.13);
}

.boost-hud strong {
  transition: color 160ms ease, text-shadow 160ms ease;
}
.boost-hud.boosting strong {
  color: #ffe66d;
  text-shadow: 0 0 14px rgba(255,230,109,0.55);
}
@media (max-width: 560px) {
  .hud {
    grid-template-columns: repeat(2, 1fr);
  }
  .hud-item:nth-child(3) {
    border-left: 0;
    border-top: 1px solid var(--line);
  }
  .hud-item:nth-child(4) {
    border-top: 1px solid var(--line);
  }
}