.rf-header { position: sticky; top: 0; z-index: 60; background: rgba(0,0,0,.94); border-bottom: 1px solid rgba(255,255,255,.1); }
.rf-header * { box-sizing: border-box; }
.rf-nav { max-width: 1120px; margin: auto; padding: 12px 24px; display: flex; align-items: center; gap: 24px; min-height: 64px; }
.rf-header a, .rf-header summary { color: #aaaab1; text-decoration: none; font-size: 14px; line-height: 1.4; }
.rf-header a:hover, .rf-header a[aria-current="page"], .rf-header summary:hover { color: #fff; text-decoration: none; }
.rf-header a:focus-visible, .rf-header summary:focus-visible { outline: 2px solid #2997ff; outline-offset: 3px; border-radius: 6px; }
.rf-header .rf-brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; color: #f5f5f7; font-size: 16px; font-weight: 600; white-space: nowrap; }
.rf-brand img { width: 24px; height: 24px; }
.rf-brand span span { color: #929296; font-weight: 400; }
.rf-links { display: flex; align-items: center; gap: 22px; margin-left: auto; }
.rf-links > a, .rf-guides summary { display: flex; align-items: center; min-height: 40px; }
.rf-guides { position: relative; padding: 0; border: 0; }
.rf-guides summary { cursor: pointer; list-style: none; gap: 8px; font-weight: 500; }
.rf-guides summary::-webkit-details-marker { display: none; }
.rf-guides summary::after { content: none; }
.rf-guide-list { position: absolute; top: calc(100% + 8px); right: 0; width: 274px; max-height: calc(100dvh - 130px); overflow-y: auto; overscroll-behavior: contain; padding: 8px; border: 1px solid #363639; border-radius: 14px; background: #171719; box-shadow: 0 18px 50px #0009; }
.rf-guide-list a { display: block; padding: 12px; border-radius: 8px; }
.rf-guide-list a:hover, .rf-guide-list a[aria-current="page"] { background: #27272b; }
.rf-header .rf-download { background: #0a84ff; color: #fff; border-radius: 999px; padding: 10px 17px; font-weight: 600; font-size: 13.5px; }
.rf-skip { position: fixed; top: -100px; left: 16px; z-index: 100; padding: 10px 16px; background: #fff; color: #000; }
.rf-skip:focus { top: 12px; }
@media (max-width: 680px) {
  .rf-nav { flex-wrap: wrap; gap: 4px 16px; padding: 10px 16px 4px; }
  .rf-header .rf-download { margin-left: auto; }
  .rf-links { order: 3; width: 100%; margin: 0; justify-content: space-between; gap: 12px; }
  .rf-guide-list { right: -65px; width: min(274px, calc(100vw - 32px)); }
}