:root { color-scheme: light; --background: #f4f5f7; --panel: #fff; --text: #262932; --muted: #626975; --line: #d9dde4; --accent: #4455a7; --quote: #eff1f8; }
:root[data-theme="dark"] { color-scheme: dark; --background: #17191f; --panel: #20232b; --text: #e3e5eb; --muted: #a6acba; --line: #3b414e; --accent: #adbaff; --quote: #2a2e3d; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--background); color: var(--text); font: 16px/1.6 system-ui, sans-serif; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.skip-link { position: absolute; left: 1rem; top: -5rem; z-index: 20; padding: .5rem; background: var(--panel); }
.skip-link:focus { top: .5rem; }
.forum-header { border-bottom: 1px solid var(--line); background: var(--panel); }
.header-inner { max-width: 1040px; margin: auto; padding: 17px 24px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { color: var(--text); font-size: 21px; font-weight: 750; text-decoration: none; letter-spacing: -.6px; white-space: nowrap; }
.brand span { color: var(--accent); padding-right: 6px; font-size: 28px; vertical-align: -2px; }
.header-links { display: flex; align-items: center; gap: 20px; font-size: 13px; }
.theme-toggle { padding: 5px 9px; color: var(--muted); background: transparent; border: 1px solid var(--line); border-radius: 5px; cursor: pointer; font: inherit; }
main { max-width: 960px; margin: 32px auto 64px; padding: 0 24px; }
.breadcrumbs { font-size: 13px; color: var(--muted); margin-bottom: 15px; }
.breadcrumbs span { padding: 0 7px; }
h1 { max-width: 800px; margin: 0; font-size: clamp(25px, 4vw, 34px); line-height: 1.22; letter-spacing: -.7px; }
.thread-title { display: flex; align-items: flex-start; gap: 10px; }
.ai-marker { display: inline-block; flex-shrink: 0; font-size: 17px; line-height: 1.6; cursor: help; }
.thread-title .ai-marker { margin-top: 6px; }
.thread-meta { color: var(--muted); font-size: 13px; margin: 13px 0 20px; }
.archive-tag { display: inline-block; border: 1px solid var(--line); border-radius: 4px; font-size: 11px; font-weight: 600; padding: 0 6px; margin-right: 8px; letter-spacing: .03em; }
.source-links { display: flex; gap: 10px 22px; flex-wrap: wrap; margin: 0 0 25px; font-size: 14px; }
.posts { border: 1px solid var(--line); border-radius: 7px; overflow: hidden; background: var(--panel); }
.post { display: grid; grid-template-columns: 145px minmax(0, 1fr); border-bottom: 1px solid var(--line); scroll-margin-top: 12px; }
.post:last-child { border-bottom: 0; }
.post:target { box-shadow: inset 4px 0 var(--accent); }
.post-author { padding: 23px 15px 20px 20px; font-size: 13px; overflow-wrap: anywhere; }
.post-author strong { font-size: 14px; }
.post-author span { display: block; color: var(--muted); margin-top: 3px; font-size: 11px; }
.post-content { padding: 20px 24px 23px 10px; min-width: 0; overflow-wrap: anywhere; }
.post-meta { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); font-size: 12px; margin: 0 0 11px; }
.post-meta a { color: var(--muted); text-decoration: none; }
.post-content p { margin: 0 0 12px; }
.post-content p:last-child { margin-bottom: 0; }
blockquote { margin: 0 0 14px; padding: 10px 14px; border-left: 3px solid var(--line); background: var(--quote); font-size: 14px; }
blockquote a { display: block; font-size: 12px; margin-bottom: 3px; text-decoration: none; }
.thread-end { margin-top: 23px; color: var(--muted); font-size: 13px; }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; margin-top: 22px; font-size: 14px; }
.topic-list { margin-top: 25px; padding: 24px; border: 1px solid var(--line); border-radius: 7px; background: var(--panel); }
.topic-list h2 { display: inline; margin: 0; font-size: 19px; }
.topic-list .thread-meta { margin-bottom: 0; }
@media (max-width: 600px) {
  .header-inner { padding: 12px 16px; gap: 12px; }
  .brand { font-size: 18px; }
  .header-links { gap: 10px; }
  .header-links > a { display: none; }
  main { padding: 0 14px; margin-top: 24px; }
  .post { display: block; }
  .post-author { padding: 16px 16px 0; display: flex; align-items: baseline; gap: 10px; }
  .post-author span { margin: 0; }
  .post-content { padding: 7px 16px 20px; }
  .thread-meta { line-height: 1.9; }
}
@media print { .theme-toggle, .skip-link { display: none; } .post { break-inside: avoid; } body { background: white; } }