/* Layout: one screen. The playfield is a horizontal band of flat shapes;
     menus are quiet left-aligned cards that float over it. Each world swaps the palette. */
  :root {
    --bg: #E9F0EC;
    --band: #C3D3CB;
    --ink: #1C2B27;
    --muted: #5C6E68;
    --player: #2A50D8;
    --hazard: #E2543A;
    --reward: #E3A200;
    --card: #F5F9F7;
    --line: rgba(28, 43, 39, 0.14);
    --line-strong: rgba(28, 43, 39, 0.32);
    --coin-ring: rgba(255, 255, 255, 0.45);
    --font: "Jost", "Avenir Next", "Century Gothic", "Segoe UI", system-ui, sans-serif;
  }
  /* Dark values for the first paint. Once the game starts it sets every token itself, per world and per the theme chosen in the store. */
  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
      --bg: #14201C; --band: #263A33; --ink: #E6F0EC; --muted: #98ACA5; --player: #7DB8FF; --hazard: #FF6F57; --reward: #FFD15C; --card: #1C2C27;
      --line: rgba(230, 240, 236, 0.14); --line-strong: rgba(230, 240, 236, 0.34); color-scheme: dark;
    }
  }
  :root[data-theme="dark"] {
    --bg: #14201C; --band: #263A33; --ink: #E6F0EC; --muted: #98ACA5; --player: #7DB8FF; --hazard: #FF6F57; --reward: #FFD15C; --card: #1C2C27;
    --line: rgba(230, 240, 236, 0.14); --line-strong: rgba(230, 240, 236, 0.34); color-scheme: dark;
  }
  html, body { height: 100%; }
  body {
    background: var(--bg); color: var(--ink); font-family: var(--font);
    overflow: hidden; -webkit-user-select: none; user-select: none;
    -webkit-tap-highlight-color: transparent; -webkit-touch-callout: none;
  }
  #stage { position: relative; height: 100%; overflow: hidden; touch-action: none; }
  #game { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }

  button { font: inherit; color: inherit; border: 0; background: none; cursor: pointer; padding: 0; }
  button:focus-visible { outline: 2px solid var(--player); outline-offset: 3px; }

  /* heads-up display */
  #hud {
    position: absolute; top: 0; left: 0; right: 0; height: 40px; padding-inline: 16px;
    display: flex; justify-content: space-between; align-items: center; gap: 12px;
    pointer-events: none; font-size: 15px; font-weight: 500; letter-spacing: 0.03em;
    font-variant-numeric: tabular-nums;
  }
  .hud-r { display: flex; align-items: center; gap: 14px; }
  .gems { display: inline-flex; align-items: center; gap: 7px; }
  .gem { width: 11px; height: 11px; background: var(--reward); border-radius: 50%; display: inline-block; box-shadow: inset 0 0 0 2px var(--coin-ring); flex: none; }
  .hearts { display: inline-flex; gap: 5px; }
  .heart { width: 10px; height: 10px; border-radius: 50%; background: var(--player); box-sizing: border-box; }
  .heart.lost { background: transparent; border: 1.5px solid var(--line-strong); }
  .icon { pointer-events: auto; width: 36px; height: 36px; display: grid; place-items: center; border-radius: 50%; }
  .icon svg { width: 16px; height: 16px; fill: var(--ink); }

  /* first-route hint */
  #hint {
    position: absolute; left: 16px; display: flex; align-items: center; gap: 10px;
    font-size: 15px; color: var(--ink); pointer-events: none;
    background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 8px 14px 8px 10px;
  }
  .ring { width: 18px; height: 18px; border-radius: 50%; border: 2px solid var(--player); animation: press 1.4s ease-in-out infinite; }
  @keyframes press { 0%, 100% { transform: scale(1); background: transparent; } 45%, 70% { transform: scale(0.72); background: var(--player); } }

  /* cards */
  .card {
    position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
    width: min(360px, calc(100% - 32px)); box-sizing: border-box;
    background: var(--card); border: 1px solid var(--line); border-radius: 22px;
    padding: 22px 22px 16px; display: flex; flex-direction: column; gap: 16px;
  }
  @media (max-aspect-ratio: 1/1) {
    .card { top: auto; bottom: calc(20px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%); }
  }
  @media (max-height: 430px) {
    .card { padding: 14px 18px 12px; gap: 10px; }
    h1 { font-size: 30px; }
  }
  h1 { margin: 0; font-size: 40px; font-weight: 300; letter-spacing: -0.01em; line-height: 1; }
  h2 { margin: 0; font-size: 24px; font-weight: 400; line-height: 1.15; text-wrap: balance; }
  .tag { margin: 6px 0 0; color: var(--muted); font-size: 15px; }
  .note { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.35; }

  .stepper { display: grid; grid-template-columns: 40px 1fr auto 40px; grid-template-areas: "prev name stars next" "prev meta meta next"; align-items: center; gap: 2px 10px; }
  #btnPrev { grid-area: prev; } #mRoute { grid-area: name; } #mStars { grid-area: stars; } #btnNext { grid-area: next; } #mMeta { grid-area: meta; }
  .round { width: 40px; height: 40px; border-radius: 50%; border: 1.5px solid var(--line-strong); display: grid; place-items: center; }
  .round svg { width: 14px; height: 14px; stroke: var(--ink); fill: none; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
  .round:disabled { opacity: 0.3; cursor: default; }
  .route-n { font-size: 24px; font-weight: 400; font-variant-numeric: tabular-nums; line-height: 1.1; }
  .route-meta { font-size: 13px; color: var(--muted); letter-spacing: 0.04em; white-space: pre-line; line-height: 1.35; }
  .stars { display: inline-flex; gap: 3px; }
  .stars svg { width: 18px; height: 18px; }
  .star-on { fill: var(--reward); stroke: var(--reward); }
  .star-off { fill: none; stroke: var(--line-strong); }
  .stars svg path { stroke-width: 1.4; stroke-linejoin: round; }

  .actions { display: flex; gap: 10px; flex-wrap: wrap; }
  .btn { height: 48px; border-radius: 24px; padding: 0 22px; font-size: 17px; font-weight: 500; flex: 1 1 auto; white-space: nowrap; }
  .btn.primary { background: var(--ink); color: var(--bg); }
  .btn.ghost { border: 1.5px solid var(--line-strong); }
  .actions .round { flex: none; width: 48px; height: 48px; }
  .round svg.fill { fill: var(--ink); stroke: none; }
  .facts { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 6px; font-size: 15px; line-height: 1.3; }
  .facts b { font-weight: 600; font-variant-numeric: tabular-nums; }
  .card { max-height: calc(100% - 24px); overflow-y: auto; }
  .tabs { display: flex; gap: 6px; }
  .tab { height: 34px; padding: 0 14px; border-radius: 17px; font-size: 14px; font-weight: 500; border: 1.5px solid var(--line-strong); display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
  .tab.try { border-color: var(--player); box-shadow: inset 0 0 0 1px var(--player); }
  .tab .ico { flex: none; }
  .tab[aria-selected="true"], .tab[aria-pressed="true"] { background: var(--ink); color: var(--bg); border-color: var(--ink); }
  .lb { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; font-size: 15px; font-variant-numeric: tabular-nums; }
  .lb li { display: grid; grid-template-columns: 26px minmax(0, 1fr) auto; align-items: center; gap: 8px; padding: 7px 0; border-top: 1px solid var(--line); }
  .lb li:first-child { border-top: 0; }
  .lb .rank { color: var(--muted); }
  .lb .who { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .lb .me .who { font-weight: 600; }
  .lb .kind { font-size: 11px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--muted); margin-left: 6px; }
  .lb .score { color: var(--muted); font-size: 14px; white-space: nowrap; }
  .namerow { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; align-items: center; }
  .namerow input { font: inherit; font-size: 16px; color: var(--ink); background: transparent; border: 1.5px solid var(--line-strong); border-radius: 12px; height: 42px; padding: 0 12px; min-width: 0; -webkit-user-select: text; user-select: text; }
  .namerow .btn { height: 42px; flex: none; padding: 0 16px; font-size: 15px; }
  .btn.small { height: 40px; font-size: 15px; padding: 0 14px; display: inline-flex; align-items: center; justify-content: center; gap: 7px; }
  .btn:disabled { opacity: 0.4; cursor: default; }
  .tab:disabled { opacity: 0.4; cursor: default; }
  .tab .gem { margin-left: 3px; width: 9px; height: 9px; box-shadow: inset 0 0 0 1.5px var(--coin-ring); }
  .bal { margin: -8px 0 0; display: flex; align-items: center; gap: 8px; font-size: 16px; color: var(--muted); font-variant-numeric: tabular-nums; }
  .bal b { color: var(--ink); font-weight: 600; }
  .shop { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; }
  .shop li { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 12px; padding: 10px 0; border-top: 1px solid var(--line); }
  .shop li:first-child { border-top: 0; }
  .shop li.looks { grid-template-columns: minmax(0, 1fr); gap: 8px; }
  .meter { display: block; height: 4px; border-radius: 2px; background: var(--line); margin: 7px 0 5px; overflow: hidden; }
  .meter i { display: block; height: 100%; border-radius: 2px; background: var(--player); }
  .buy.wide { justify-content: center; }
  .toast { position: absolute; left: 50%; top: 10px; transform: translateX(-50%); width: max-content; max-width: calc(100% - 32px); box-sizing: border-box; z-index: 5;
    background: var(--ink); color: var(--bg); font-size: 14px; line-height: 1.3; padding: 9px 14px; border-radius: 14px; pointer-events: none; text-align: center; }
  .gift { color: var(--ink); }
  .note b { color: var(--ink); font-weight: 600; }
  .modes .btn { padding: 0 14px; }
  /* a player shape in the store: the game's own drawing, used as a mask so it takes the colour of the text around it */
  .sk { width: 16px; height: 16px; display: inline-block; background: currentColor; -webkit-mask-image: var(--m); mask-image: var(--m);
    -webkit-mask-size: contain; mask-size: contain; -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat; -webkit-mask-position: center; mask-position: center; }
  /* an upgrade level that has not opened yet */
  .shut { margin: 0; height: 36px; padding: 0 12px; border: 1.5px dashed var(--line-strong); border-radius: 18px; display: inline-flex; align-items: center; justify-content: center; gap: 6px; font-size: 13px; }
  .gift b { font-weight: 600; }
  .tab .ico + span + .ico, .tab span + .ico { margin-left: 3px; }
  .prevwrap { flex: none; position: sticky; top: 0; z-index: 1; background: var(--card); padding: 8px 0; margin: -8px 0; }
  .prevwrap::before { content: ""; position: absolute; left: 0; right: 0; bottom: 100%; height: 24px; background: var(--card); }   /* nothing shows above the strip while the list scrolls under it */
  #shopMsg, #panel .tabs, #testRow { position: relative; z-index: 2; }
  .prev { display: block; width: 100%; height: 92px; border-radius: 12px; }
  .shop b { font-weight: 600; font-size: 16px; }
  .shop p { margin: 2px 0 0; font-size: 13.5px; line-height: 1.3; color: var(--muted); }
  .lvl { font-size: 12px; letter-spacing: 0.04em; color: var(--muted); margin-left: 8px; white-space: nowrap; font-variant-numeric: tabular-nums; }
  .buy { flex: none; height: 40px; padding: 0 14px; font-size: 15px; display: inline-flex; align-items: center; gap: 7px; font-variant-numeric: tabular-nums; }
  .chips { display: flex; gap: 6px; flex-wrap: wrap; }
  .shieldchip { width: 12px; height: 12px; border-radius: 50%; border: 2px solid var(--player); box-sizing: border-box; display: inline-block; }
  .shop li.head { grid-template-columns: minmax(0, 1fr); gap: 0; padding-top: 16px; }
  .pay { display: flex; flex-direction: column; gap: 6px; align-items: stretch; }
  .pay .buy { height: 36px; justify-content: center; }
  .adbar { margin: 0; height: 6px; border-radius: 3px; background: var(--line); overflow: hidden; }
  .adbar span { display: block; height: 100%; width: 0; background: var(--player); transition: width 1s linear; }
  .bal span { margin-left: 6px; }
  .btn.small svg { flex: none; }
  .foot { display: flex; align-items: center; flex-wrap: wrap; gap: 2px 14px; font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }
  .chips .lvl { margin: 0 4px 0 0; align-self: center; }
  .foot .grow { flex: 1; min-width: 0; }
  .link { color: var(--muted); text-decoration: underline; text-underline-offset: 3px; font-size: 13px; min-height: 28px; }

  .rows { display: flex; flex-direction: column; gap: 8px; margin: 0; padding: 0; list-style: none; }
  .rows li { display: flex; align-items: center; gap: 10px; font-size: 16px; }
  .rows li.off { color: var(--muted); }
  .rows svg { width: 20px; height: 20px; flex: none; }
  .rows svg path { stroke-width: 1.4; stroke-linejoin: round; }
  .rows .val { margin-left: auto; font-variant-numeric: tabular-nums; color: var(--muted); font-size: 14px; }

  @media (prefers-reduced-motion: reduce) { .ring { animation: none; } }