:root {
  --tfc-focus: var(--tf-blue);
  --tfc-gutter: 24px;
  --tfc-wrap: 1200px;
  --tfc-ink: var(--tf-ink-950);
  --tfc-ink-muted: var(--tf-ink-600);
  --tfc-line: var(--tf-ink-100);
  --tfc-line-strong: var(--tf-ink-200);
  --tfc-night: #0B0D11;
  --tfc-night-line: var(--tf-ink-700);
  --tfc-night-muted: var(--tf-ink-300);
  --tfc-paper: #FFFFFF;
  --tfc-paper-alt: var(--tf-ink-50);
  --tfc-red: var(--tf-red-500);
  --tfc-red-action: var(--tf-red-600);
  --tfc-red-action-hover: var(--tf-red-700);
}

.site-header, .site-footer { font-family: var(--tf-sans); line-height: 1.5; }
.site-header *, .site-footer *, .site-header *::before, .site-footer *::before { box-sizing: border-box; }
.site-header .wrap, .site-footer .wrap { max-width: var(--tfc-wrap); margin: 0 auto; padding: 0 var(--tfc-gutter); }
.site-footer ul, .site-footer p { margin: 0; }
.site-footer li { padding: 0; font-size: inherit; color: inherit; max-width: none; }
.site-footer li::before { content: none; display: none; }

:focus-visible { outline: 3px solid var(--tfc-focus); outline-offset: 3px; border-radius: 4px; }
.skip-link { position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--tfc-ink); color: #fff; padding: 10px 14px; border-radius: 6px; text-decoration: none; font-weight: 700; }
.skip-link:focus { top: 12px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 0 22px; border-radius: 8px; border: 1px solid transparent;
  font: 700 1rem/1 var(--tf-sans); text-decoration: none; cursor: pointer;
  transition: background-color .15s ease, border-color .15s ease, color .15s ease;
}
.btn--primary { background: var(--tfc-red-action); color: #fff; }
.btn--primary:hover { background: var(--tfc-red-action-hover); }
.btn--quiet { background: transparent; color: var(--tfc-ink); border-color: var(--tfc-line-strong); }
.btn--quiet:hover { border-color: var(--tfc-ink); }
.section--night .btn--quiet { color: #fff; border-color: var(--tfc-night-line); }
.section--night .btn--quiet:hover { border-color: #fff; }
.btn--sm { min-height: 40px; padding: 0 16px; font-size: .9375rem; }
.btn[disabled] { opacity: .6; cursor: progress; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92); backdrop-filter: saturate(1.4) blur(10px); -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--tfc-line);
}
.site-header .wrap { display: flex; align-items: center; gap: 28px; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--tfc-ink); font-weight: 900; font-size: 1.25rem; letter-spacing: -0.01em; flex-shrink: 0; }
.brand img { width: 28px; height: 28px; }
.brand b { color: var(--tfc-red); font-weight: 900; }
.site-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.site-nav a { padding: 8px 12px; border-radius: 6px; text-decoration: none; color: var(--tfc-ink-muted); font-size: .9688rem; font-weight: 700; }
.site-nav a:hover { color: var(--tfc-ink); background: var(--tfc-paper-alt); }
.site-nav .btn { margin-left: 10px; color: #fff; }
.site-nav .btn:hover { color: #fff; }
.menu-toggle { display: none; margin-left: auto; background: none; border: 1px solid var(--tfc-line-strong); border-radius: 8px; width: 44px; height: 44px; cursor: pointer; color: var(--tfc-ink); }
.menu-toggle svg { width: 20px; height: 20px; }

.site-footer { background: var(--tfc-night); color: var(--tfc-night-muted); padding: 72px 0 40px; border-top: 1px solid #1B1F27; font-size: .9375rem; }
.footer-grid { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 40px; }
.site-footer .brand { color: #fff; }
.footer-about { margin-top: 16px; max-width: 34ch; }
.site-footer h4 { color: #fff; font: 600 .75rem/1 var(--tf-mono); letter-spacing: .14em; text-transform: uppercase; margin-bottom: 16px; }
.site-footer ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.site-footer a { color: var(--tfc-night-muted); text-decoration: none; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.footer-legal { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; margin-top: 56px; padding-top: 24px; border-top: 1px solid #1B1F27; font-size: .8125rem; }
.footer-legal nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }

@media (max-width: 900px) {
  .site-nav { display: none; position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 2px; padding: 12px var(--tfc-gutter) 20px; background: var(--tfc-paper); border-bottom: 1px solid var(--tfc-line); box-shadow: 0 20px 30px -20px rgba(15,17,21,.25); }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 12px 8px; font-size: 1.0625rem; }
  .site-nav .btn { margin: 8px 0 0; }
  .menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
}
@media (max-width: 640px) {
  :root { --tfc-gutter: 16px; }
}

.crumb { font-family: var(--tf-mono); font-size: 12px; letter-spacing: .04em; color: var(--tfc-ink-muted); display: flex; gap: 8px; align-items: center; margin-bottom: 14px; }
.crumb a { color: inherit; text-decoration: none; }
.crumb a:hover { color: var(--tfc-ink); text-decoration: underline; }
.crumb [aria-current="page"] { color: var(--tfc-ink); }