/* Tesla Funhouse — shared styles. Big touch targets for in-car screens.
   Colors are tokens; js/common.js sets data-theme="dark" or "light" on <html>. */
:root,
:root[data-theme="dark"] {
  --bg: #0b0c0f;
  --bg-2: #14161b;
  --card: #1b1e25;
  --card-hover: #242833;
  --line: #2c313c;
  --text: #f2f4f7;
  --muted: #9aa3b2;
  --accent: #e82127; /* Tesla red */
  --accent-2: #3e6ae1; /* Tesla blue */
  --good: #2ecc71;
  --line-strong: #3a4150;
  --topbar: rgba(11, 12, 15, 0.92);
  --overlay: rgba(11, 12, 15, 0.82);
  --canvas: #101217;
  --canvas-fg: #f2f4f7;
  --snake-head: #7dffb0;
  --o-mark: #8fb0ff;
  --tile-2: #2a2f3a;
  --tile-4: #343b4a;
  --radius: 18px;
  --tap: 64px;
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f4f5f7;
  --bg-2: #e8eaee;
  --card: #ffffff;
  --card-hover: #eef0f3;
  --line: #d4d8df;
  --text: #15171c;
  --muted: #5a6372;
  --good: #1e9e57;
  --line-strong: #b5bcc8;
  --topbar: rgba(244, 245, 247, 0.92);
  --overlay: rgba(244, 245, 247, 0.86);
  --canvas: #e4e7ec;
  --canvas-fg: #15171c;
  --snake-head: #127a3f;
  --o-mark: #3e6ae1;
  --tile-2: #d6dbe3;
  --tile-4: #c3cad5;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html,
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

/* ---------- Header ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 28px;
  background: var(--topbar);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.brand .logo {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--accent);
  font-size: 22px;
  color: #fff;
}

.brand small {
  color: var(--muted);
  font-weight: 400;
  font-size: 14px;
}

.topbar .spacer {
  flex: 1;
}

.settings {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.select {
  min-height: 52px;
  max-width: 220px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card);
  color: var(--text);
  font: inherit;
  font-size: 17px;
}

.icon-btn {
  min-width: 52px;
  padding: 0 12px;
  font-size: 22px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card);
  font-size: 18px;
  font-weight: 600;
  transition:
    background 0.15s,
    transform 0.1s;
}

.btn:hover {
  background: var(--card-hover);
}
.btn:active {
  transform: scale(0.97);
}
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn.primary:hover {
  background: #ff3a40;
}
.btn.blue {
  background: var(--accent-2);
  border-color: var(--accent-2);
  color: #fff;
}

/* ---------- Layout ---------- */
main {
  max-width: 1500px;
  margin: 0 auto;
  padding: 28px;
}

.hero {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 36px;
  margin-bottom: 28px;
  border-radius: 26px;
  background:
    radial-gradient(circle at 85% 20%, rgba(232, 33, 39, 0.35), transparent 50%),
    radial-gradient(circle at 10% 90%, rgba(62, 106, 225, 0.3), transparent 50%), var(--bg-2);
  border: 1px solid var(--line);
}

.hero h1 {
  margin: 0 0 8px;
  font-size: 44px;
}
.hero p {
  margin: 0;
  color: var(--muted);
  font-size: 20px;
  max-width: 640px;
}
.hero .actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.notice {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 20px;
  margin-bottom: 28px;
  border-radius: 14px;
  background: rgba(232, 33, 39, 0.12);
  border: 1px solid rgba(232, 33, 39, 0.4);
  font-size: 17px;
}

/* ---------- Search + tabs ---------- */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.search {
  flex: 1 1 320px;
  min-height: 56px;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card);
  color: var(--text);
  font-size: 19px;
  outline: none;
}

.search:focus {
  border-color: var(--accent-2);
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tab {
  min-height: 56px;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card);
  font-size: 17px;
  font-weight: 600;
}

.tab.active {
  background: var(--text);
  color: var(--bg);
}

/* ---------- Sections + cards ---------- */
.section {
  margin-bottom: 40px;
}

.section h2 {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 6px;
  font-size: 28px;
}

.section .sub {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 17px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 16px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 150px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  transition:
    background 0.15s,
    transform 0.12s,
    border-color 0.15s;
}

.card:hover {
  background: var(--card-hover);
  border-color: var(--line-strong);
}
.card:active {
  transform: scale(0.98);
}

.card .icon {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border-radius: 14px;
  font-size: 30px;
  background: var(--bg-2);
}

.card h3 {
  margin: 0;
  font-size: 20px;
}
.card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.4;
}

.badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  background: var(--bg-2);
  color: var(--muted);
}

.badge.play {
  background: rgba(46, 204, 113, 0.15);
  color: var(--good);
}

.empty {
  display: none;
  padding: 40px;
  text-align: center;
  color: var(--muted);
  font-size: 19px;
}

footer {
  padding: 30px 28px 50px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}

/* ---------- Game / feature pages ---------- */
.page {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 24px;
  min-height: calc(100vh - 72px);
}

.page h1 {
  margin: 0;
  font-size: 34px;
}

.hud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

.stat {
  min-width: 130px;
  padding: 10px 18px;
  border-radius: 14px;
  background: var(--card);
  border: 1px solid var(--line);
  text-align: center;
}

.stat span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.stat b {
  font-size: 26px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.overlay {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  border-radius: inherit;
  background: var(--overlay);
  text-align: center;
}

.overlay.show {
  display: flex;
}
.overlay h2 {
  margin: 0;
  font-size: 36px;
}
.overlay p {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}

@media (max-width: 700px) {
  .topbar {
    padding: 12px 16px;
  }
  main {
    padding: 16px;
  }
  .hero {
    padding: 24px;
  }
  .hero h1 {
    font-size: 32px;
  }
  .brand small {
    display: none;
  }
  .topbar {
    flex-wrap: wrap;
  }
  .select {
    max-width: 160px;
  }
}

/* ---------- Shared game pieces ---------- */
.canvas-board {
  position: relative;
  border-radius: 18px;
  border: 1px solid var(--line);
  overflow: hidden;
  touch-action: none;
}

.canvas-board canvas {
  display: block;
  background: var(--canvas);
}

.hint {
  color: var(--muted);
}