body { min-width: 0; overflow-x: hidden; }
.forum-topbar {
  position: sticky; z-index: 80; top: 0; display: grid;
  grid-template-columns: minmax(180px, auto) minmax(0, 1fr) auto;
  min-height: 64px; padding: 0 clamp(16px, 3vw, 40px); align-items: center; gap: 32px;
  border-bottom: 1px solid var(--border-strong);
  background: var(--bg);
}
.forum-brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; }
.forum-brand > span:last-child { display: flex; align-items: baseline; gap: 7px; }
.forum-brand b { font: 600 16px var(--font-sans); letter-spacing: -.02em; }
.forum-brand small { color: var(--ink-3); font: 400 11px var(--font-sans); }
.forum-brand-mark { position: relative; display: grid; width: 29px; height: 29px; place-items: center; border: 1px solid var(--border-strong); border-radius: 50%; }
.forum-brand-mark::before { content: ""; position: absolute; inset: 5px; border: 1px solid var(--ink-3); border-radius: 50%; }
.forum-brand-mark i { position: relative; width: 6px; height: 6px; border-radius: 50%; background: var(--brand); }
.forum-topbar nav { display: flex; min-width: 0; align-items: center; gap: 6px; }
.forum-topbar nav a { padding: 10px 12px; color: var(--ink-2); border-radius: 4px; font-size: 13px; text-decoration: none; white-space: nowrap; }
.forum-topbar nav a:hover, .forum-topbar nav a.active { color: var(--ink); background: var(--surface-2); }
.forum-account { display: flex; align-items: center; justify-content: flex-end; gap: 10px; color: var(--ink-3); font-size: 12px; }
.forum-account > span { color: var(--ink-3); font-size: 12px; white-space: nowrap; }
.forum-account > span b { color: var(--ink-2); font-weight: 600; }
.forum-account a { min-height: 36px; padding: 8px 12px; color: var(--ink-2); border: 1px solid var(--border); border-radius: 4px; text-decoration: none; }
.forum-account a.primary { color: var(--button-primary-text); border-color: var(--brand); background: var(--brand); font-weight: 600; }
.forum-theme { display: inline-flex; align-items: center; gap: 2px; padding: 2px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface-2); }
.forum-theme button { min-height: 28px; padding: 4px 10px; color: var(--ink-3); border-radius: 999px; font-size: 11px; font-weight: 500; white-space: nowrap; }
.forum-theme button:hover { color: var(--ink); }
.forum-theme button.on { color: var(--button-primary-text); background: var(--brand); }
.forum-theme button:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.forum-auth-dialog { width: min(420px, calc(100% - 28px)); padding: 26px; color: var(--ink); background: var(--surface); border: 1px solid var(--border); border-radius: 10px; }
.forum-auth-dialog::backdrop { background: rgb(0 0 0 / .65); }
.forum-auth-dialog h2 { margin: 0 0 6px; font-size: 20px; }
.forum-auth-dialog .forum-auth-error { padding: 9px 11px; color: var(--down); border: 1px solid color-mix(in srgb, var(--down) 35%, var(--border)); border-radius: 6px; background: var(--down-soft); font-size: 12px; }
.forum-auth-dialog label { display: grid; gap: 6px; margin-top: 12px; font-size: 12px; color: var(--ink-2); }
.forum-auth-dialog input { width: 100%; height: 38px; padding: 0 11px; color: var(--ink); border: 1px solid var(--border-strong); border-radius: 6px; background: var(--surface-2); font-size: 13px; }
.forum-auth-dialog footer { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; }
.forum-auth-dialog footer button { padding: 9px 16px; border-radius: 6px; font-size: 12px; font-weight: 600; }
.forum-auth-dialog footer button.primary { color: var(--button-primary-text); background: var(--brand); }
.forum-auth-dialog footer button.plain { color: var(--ink-2); border: 1px solid var(--border); background: transparent; }
.forum-main { min-height: calc(100vh - 68px); padding: clamp(22px, 4vw, 48px) clamp(14px, 3.5vw, 52px) 70px; background: radial-gradient(circle at 18% -6%, color-mix(in srgb, var(--brand) 7%, transparent), transparent 35rem), var(--bg); }
.forum-footer { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 24px clamp(18px, 4vw, 58px); color: var(--ink-3); border-top: 1px solid var(--border); background: var(--bg); font-size: 12px; }
.forum-footer p { margin: 0; }.forum-footer b { color: var(--ink-2); }.forum-footer nav { display: flex; gap: 17px; }.forum-footer a { color: var(--ink-3); text-decoration: none; }.forum-footer a:hover { color: var(--brand-2); }
@media (max-width: 1100px) {
  .forum-topbar { grid-template-columns: 1fr auto; gap: 10px 12px; }
  .forum-topbar nav {
    grid-row: 2; grid-column: 1 / -1; overflow-x: auto; padding-bottom: 8px;
    scrollbar-width: none; -webkit-overflow-scrolling: touch; scroll-behavior: auto;
    -webkit-mask-image: linear-gradient(to right, #000 88%, transparent);
    mask-image: linear-gradient(to right, #000 88%, transparent);
  }
  .forum-topbar nav::-webkit-scrollbar { display: none; }
  .forum-topbar nav:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
  .forum-account { min-width: 0; overflow-x: auto; scrollbar-width: none; }
  .forum-account::-webkit-scrollbar { display: none; }
  .forum-account > span { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
  .forum-account a:first-of-type { display: none; }
  .forum-theme { flex: 0 0 auto; }
  .forum-theme button { padding: 4px 8px; font-size: 10px; }
  .forum-footer { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 600px) { .forum-topbar { padding-inline: 13px; }.forum-main { padding-inline: 10px; }.forum-footer nav { flex-wrap: wrap; } }