/* Hallmark · theme: project DESIGN.md · genre: modern-minimal · shape: installation guide · signature: player button locator · surface: absolute */
/* Hallmark · pre-emit critique: P4 H4 E4 S4 R5 V3 · weakest: V, use an open installation checklist rather than marketing sections */
:root {
  --background: #fff;
  --foreground: #191b20;
  --body: #353840;
  --muted: #5c606a;
  --border: #e4e6e9;
  --secondary: #f5f5f6;
  --primary: #2563eb;
  --primary-hover: #1e50c4;
  --primary-foreground: #fff;
  --focus: #797e88;
  --font: "Segoe UI", Arial, sans-serif;
  --image-label-bg: #fff;
  --image-label-ink: #191b20;
  color-scheme: light;
}
* { box-sizing: border-box; }
html, body { overflow-x: clip; }
body { margin: 0 auto; max-width: 1280px; padding: 32px 48px; background: var(--background); color: var(--foreground); font-family: var(--font); -webkit-font-smoothing: antialiased; }
.page-header { display: flex; align-items: center; min-height: 64px; margin-bottom: 24px; }
.brand { display: flex; align-items: center; gap: 12px; font-size: 14px; font-weight: 600; }
.brand img { border-radius: 8px; }
[hidden] { display: none !important; }
main { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 56px; align-items: center; padding: 24px 0 32px; }
h1 { margin: 0; font-size: clamp(36px, 4.2vw, 56px); line-height: 1.08; letter-spacing: -.045em; font-weight: 650; overflow-wrap: break-word; min-width: 0; text-wrap: balance; }
.intro > p { max-width: 350px; margin: 24px 0 32px; font-size: 18px; line-height: 1.6; color: var(--muted); }
.intro > .refresh-hint { font-size: 13px; margin: 16px 0 0; max-width: 280px; }
.primary { display: inline-flex; align-items: center; justify-content: center; gap: 16px; padding: 16px 24px; min-height: 48px; border-radius: 999px; background: var(--primary); color: var(--primary-foreground); text-decoration: none; font-size: 15px; font-weight: 600; }
.primary:hover { background: var(--primary-hover); }
.primary:active { transform: translateY(1px); }
summary:active { color: var(--foreground); }
.primary svg { width: 18px; height: 18px; flex: none; }
a:focus-visible, summary:focus-visible, button:focus-visible { outline: 3px solid var(--focus); outline-offset: 5px; }
.player-guide { margin: 0 0 24px; }
.player-image { position: relative; }
.player-image > img { display: block; width: 100%; height: auto; border-radius: 14px; }
.button-marker { position: absolute; left: 63.2%; top: 86.5%; width: 7.2%; height: 13.1%; border: 3px solid var(--image-label-bg); outline: 3px solid var(--primary); border-radius: 50%; pointer-events: none; }
.image-label { position: absolute; bottom: 21%; left: 66.8%; transform: translateX(-50%); padding: 8px 12px; border-radius: 8px; background: var(--image-label-bg); color: var(--image-label-ink); font-size: 13px; font-weight: 600; white-space: nowrap; }
.image-label svg { position: absolute; left: 50%; top: 100%; transform: translateX(-50%); width: 24px; height: 24px; color: var(--image-label-bg); }
figcaption { margin-top: 12px; font-size: 13px; color: var(--muted); }
ol { list-style: none; margin: 0; padding: 0; }
li { display: flex; align-items: baseline; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--border); }
li:first-child { padding-top: 0; }
li:last-child { border-bottom: 0; padding-bottom: 0; }
.number { display: inline-flex; align-items: center; justify-content: center; flex: 0 0 32px; height: 32px; border-radius: 50%; background: var(--secondary); color: var(--muted); font-size: 14px; }
h2 { margin: 0 0 4px; font-size: 16px; line-height: 1.4; font-weight: 600; }
li p { margin: 0; font-size: 14px; line-height: 1.6; color: var(--muted); }
footer { padding-top: 24px; border-top: 1px solid var(--border); color: var(--muted); font-size: 13px; line-height: 1.6; }
footer > p { margin: 0 0 8px; }
details { max-width: 640px; }
summary { cursor: pointer; color: var(--body); width: fit-content; min-height: 32px; padding: 4px 0; }
details p { margin: 8px 0; }
@media (max-width: 720px) {
  body { padding: 24px; }
  .page-header { flex-direction: column; gap: 24px; min-height: 0; }
  main { grid-template-columns: minmax(0, 1fr); gap: 32px; padding: 32px 0; }
  .intro > p { margin: 20px 0 24px; }
  .image-label { font-size: 12px; }
}
@media (prefers-color-scheme: dark) {
  :root { color-scheme: dark; --background: #181818; --foreground: #f4f4f4; --body: #dedede; --muted: #b7b7b7; --border: #393939; --secondary: #272727; --primary: #2563eb; --primary-hover: #1e50c4; --focus: #969696; }
}
.intro { align-self: start; padding-top: 16px; }
.intro > .installed-label { color: var(--foreground); font-size: 13px; font-weight: 600; letter-spacing: .03em; margin: 0 0 20px; }