/*
  Shared skin for yos-gh game pages.
  Keep this file identical in every game repository (web/site.css).
  Each page sets only its own values in index.html:
    --accent       signature color of the game
    --game-ratio   aspect ratio of the game canvas, e.g. 16 / 9
    --game-width   maximum width of the game frame
*/

:root {
  color-scheme: dark;
  /* Radix Colors Gray (dark): gray1, gray2, gray4, gray6, gray12, gray11 */
  --bg: #111111;
  --surface: #191919;
  --line: #2a2a2a;
  --frame: #3a3a3a;
  --text: #eeeeee;
  --muted: #b4b4b4;
  --accent: #6fd6c6;
  --game-ratio: 16 / 9;
  --game-width: 1120px;
  --page-width: 1120px;
  --content-width: 920px;
  --font: Inter, "Segoe UI", "Hiragino Sans", "Yu Gothic UI", Helvetica, Arial, sans-serif;
  --mono: "Cascadia Mono", Consolas, "SFMono-Regular", monospace;
}

* { box-sizing: border-box; }

html { background: var(--bg); }

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: var(--font);
  line-height: 1.65;
}

a { color: var(--accent); text-underline-offset: .2em; }
a:hover { color: var(--text); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }

.skip { position: absolute; top: -100px; left: 8px; z-index: 2; padding: 8px 12px; background: var(--surface); }
.skip:focus { top: 8px; }

/* Top bar: title, tagline and links */
.topbar {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 10px max(20px, calc((100vw - var(--page-width)) / 2));
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(12px);
}

.brand { display: flex; align-items: baseline; gap: 14px; min-width: 0; }
.brand h1 { margin: 0; font-size: 1rem; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; white-space: nowrap; }
.brand p { margin: 0; color: var(--muted); font-size: .78rem; letter-spacing: .06em; }

.topbar nav { display: flex; flex-wrap: wrap; gap: 6px 20px; font-size: .82rem; white-space: nowrap; }

/* Game frame */
.game-wrap { width: min(calc(100% - 32px), var(--game-width)); margin: 0 auto; padding: 22px 0 28px; }

.game-shell {
  width: 100%;
  aspect-ratio: var(--game-ratio);
  overflow: hidden;
  border: 1px solid var(--frame);
  border-radius: 12px;
  background: #05080c;
  box-shadow: 0 24px 80px rgb(0 0 0 / 44%);
}

.game-shell iframe { display: block; width: 100%; height: 100%; border: 0; }

.game-note {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 4px 16px;
  margin-top: 10px;
  color: var(--muted);
  font-size: .78rem;
}
.game-note p { margin: 0; }

/* Guide */
main { border-top: 1px solid var(--line); background: color-mix(in srgb, var(--surface) 45%, transparent); }

.content { width: min(calc(100% - 40px), var(--content-width)); margin: 0 auto; padding: 42px 0 56px; }

.intro { max-width: 720px; margin: 0 0 34px; font-size: 1rem; }

.columns { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 44px; }

section { padding: 22px 0; border-top: 1px solid var(--line); }

section h2 {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}

section h3 { margin: 18px 0 6px; font-size: .9rem; font-weight: 650; }
section h2 + h3 { margin-top: 0; }

section p, section ul, section dl { margin: 0; color: var(--muted); font-size: .9rem; }
section p + p { margin-top: 10px; }
section ul { padding-left: 1.2rem; }
section li + li { margin-top: 4px; }

/* Controls: one row per action */
.controls div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  padding: 6px 0;
  border-bottom: 1px solid var(--line);
}
.controls div:first-child { border-top: 1px solid var(--line); }
.controls dt { color: var(--muted); }
.controls dd { margin: 0; color: var(--text); text-align: right; }

kbd, code {
  font-family: var(--mono);
  font-size: .8rem;
  color: var(--text);
}
kbd {
  display: inline-block;
  padding: 0 6px;
  border: 1px solid var(--frame);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: var(--surface);
  line-height: 1.5;
}

/* Footer */
footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  padding: 22px max(20px, calc((100vw - var(--page-width)) / 2)) 30px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .78rem;
}
footer nav { display: flex; gap: 18px; }

@media (max-width: 720px) {
  .topbar { align-items: flex-start; flex-direction: column; gap: 4px; }
  .brand p { display: none; }
  .game-wrap { width: 100%; padding-top: 0; }
  .game-shell { border-left: 0; border-right: 0; border-radius: 0; }
  .game-note { padding: 0 16px; }
  .columns { grid-template-columns: 1fr; }
}