:root { --bg: #0d1117; --fg: #e6e9ef; --muted: #9aa4b2; --line: #2a3140; --accent: #8ab4ff; --warn-bg: #3a2c05; --warn-fg: #ffd970; }
@media (prefers-color-scheme: light) {
  :root { --bg: #ffffff; --fg: #1b1f24; --muted: #5b6573; --line: #d8dde4; --accent: #1a56c4; --warn-bg: #fff4cc; --warn-fg: #5c4400; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 24px 16px 48px; }
h1 { font-size: 1.8rem; margin: 0.4em 0; }
h2 { font-size: 1.15rem; margin-top: 1.8em; }
.meta { color: var(--muted); font-size: 0.9rem; }
.draft { background: var(--warn-bg); color: var(--warn-fg); padding: 8px 12px; border-radius: 8px; font-size: 0.9rem; }
a { color: var(--accent); }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; display: block; overflow-x: auto; }
th, td { border: 1px solid var(--line); padding: 6px 8px; text-align: left; vertical-align: top; }
.back { margin-top: 2.5em; color: var(--muted); }
.langs { font-size: 0.85rem; color: var(--muted); line-height: 2; margin-bottom: 8px; }
.langs a, .langs strong { white-space: nowrap; }
.i18n-note { color: var(--muted); font-size: 0.85rem; border-left: 3px solid var(--line); padding-left: 10px; }
.toc { font-size: 0.92rem; line-height: 1.9; }
ol, ul { padding-left: 1.3em; }
li { margin: 0.25em 0; }
/* back to the app (top + bottom); inside the app wrappers' in-app browser (#in-app) a close hint replaces the link */
.in-app-anchor { position: absolute; top: 0; }
.app-nav { margin: 0 0 12px; }
.app-nav-bottom { margin: 2em 0 0; padding-top: 12px; border-top: 1px solid var(--line); }
.app-back { display: inline-flex; align-items: center; min-height: 44px; padding: 0 14px; border: 1px solid var(--line); border-radius: 10px; text-decoration: none; font-weight: 600; }
.app-back:hover, .app-back:focus-visible { border-color: var(--accent); }
.app-back:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.app-note { display: none; color: var(--muted); font-size: 0.9rem; }
#in-app:target ~ .app-nav .app-back { display: none; }
#in-app:target ~ .app-nav .app-note { display: inline; }