/* =========================================================================
   Chrome: header, footer, logo, search overlay
   ========================================================================= */

/* ---------- logo ---------- */
.kb-logo { display: inline-flex; align-items: center; gap: 10px; }
.kb-logo img { flex: none; filter: saturate(1.05); }
.kb-logo-word { font-weight: 700; font-size: 16px; letter-spacing: -0.02em; }
.kb-logo-word em { font-style: normal; font-weight: 500; color: var(--text-faint); }

/* ---------- header ---------- */
.kb-header {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in oklab, var(--bg), transparent 18%);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.kb-header-in { height: var(--header-h); display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.kb-header-left { display: flex; align-items: center; gap: 22px; min-width: 0; }
.kb-nav { display: flex; align-items: center; gap: 2px; }
.kb-nav-link {
  padding: 7px 11px; border-radius: 8px; font-size: 14px; font-weight: 500; color: var(--text-muted);
  transition: color .14s, background .14s;
}
.kb-nav-link:hover { color: var(--text); background: var(--panel-2); }
.kb-header-right { display: flex; align-items: center; gap: 10px; }

.kb-searchbtn {
  display: inline-flex; align-items: center; gap: 9px;
  height: 38px; padding: 0 10px 0 12px; min-width: 230px;
  border-radius: 10px; border: 1px solid var(--border-strong); background: var(--panel-2);
  color: var(--text-faint); font-size: 13.5px; transition: border-color .15s, background .15s;
}
.kb-searchbtn:hover { border-color: var(--brand-line); background: var(--panel); }
.kb-searchbtn span { flex: 1; text-align: left; }
.kb-searchbtn kbd { margin-left: auto; }

.kb-iconbtn {
  display: grid; place-items: center; width: 38px; height: 38px; border-radius: 9px;
  background: transparent; border: 1px solid transparent; color: var(--text-muted); transition: background .14s, color .14s;
}
.kb-iconbtn:hover { background: var(--panel-2); color: var(--text); }

.only-mobile { display: none !important; }
.kb-mobnav { display: none; }

@media (max-width: 900px) {
  .kb-nav { display: none; }
  .kb-searchbtn { display: none; }
  .only-desk { display: none !important; }
  .only-mobile { display: grid !important; }
  .kb-mobnav { display: flex; flex-direction: column; padding: 8px 24px 16px; gap: 2px; border-top: 1px solid var(--border); background: var(--bg); }
  .kb-mobnav a { padding: 11px 12px; border-radius: 9px; font-weight: 500; color: var(--text-muted); }
  .kb-mobnav a:hover { background: var(--panel-2); color: var(--text); }
}

/* ---------- footer ---------- */
.kb-footer { border-top: 1px solid var(--border); background: var(--surface); padding-block: 56px 30px; margin-top: 8px; }
.kb-footer-grid { display: grid; grid-template-columns: 1.6fr repeat(4, 1fr); gap: 36px; }
.kb-footer-brand p { margin-top: 14px; max-width: 30ch; font-size: 14px; }
.kb-footer-meta { margin-top: 14px; font-size: 12.5px; color: var(--brand-ink); }
.kb-footer-col h4 { font-size: 12px; text-transform: uppercase; letter-spacing: .1em; color: var(--text-faint); font-family: var(--mono); margin-bottom: 14px; font-weight: 600; }
.kb-footer-col a { display: block; padding: 5px 0; font-size: 14px; color: var(--text-muted); transition: color .14s; }
.kb-footer-col a:hover { color: var(--brand-ink); }
.kb-footer-bottom { display: flex; justify-content: space-between; gap: 16px; margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--border); font-size: 12.5px; flex-wrap: wrap; }
@media (max-width: 820px) { .kb-footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; } .kb-footer-brand { grid-column: 1 / -1; } }

/* ---------- search overlay ---------- */
.kb-search-scrim {
  position: fixed; inset: 0; z-index: 80;
  background: color-mix(in oklab, #100b07, transparent 38%);
  backdrop-filter: blur(3px);
  display: flex; justify-content: center; align-items: flex-start;
  padding: clamp(16px, 12vh, 140px) 16px 16px;
  animation: kb-fade .14s ease;
}
@keyframes kb-fade { from { opacity: 0; } }
.kb-search {
  width: 100%; max-width: 620px;
  background: var(--panel); border: 1px solid var(--border-strong);
  border-radius: 16px; box-shadow: var(--shadow-lg); overflow: hidden;
  display: flex; flex-direction: column; max-height: 70vh;
  animation: kb-pop .16s cubic-bezier(.2,.8,.3,1);
}
@keyframes kb-pop { from { transform: translateY(-8px) scale(.99); opacity: 0; } }
.kb-search-bar { display: flex; align-items: center; gap: 12px; padding: 16px 16px; border-bottom: 1px solid var(--border); }
.kb-search-bar input { flex: 1; border: 0; background: transparent; font: inherit; font-size: 16px; color: var(--text); outline: none; }
.kb-search-bar input::placeholder { color: var(--text-faint); }
.kb-search-body { overflow-y: auto; padding: 8px; }
.kb-search-sec { font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--text-faint); padding: 12px 10px 6px; }
.kb-search-row { display: flex; align-items: center; gap: 10px; width: 100%; padding: 9px 10px; border-radius: 9px; background: transparent; border: 0; text-align: left; font-size: 14px; color: var(--text-muted); }
.kb-search-row:hover { background: var(--panel-2); color: var(--text); }
.kb-search-tags { display: flex; flex-wrap: wrap; gap: 7px; padding: 4px 10px 10px; }
.kb-search-result {
  display: flex; align-items: center; gap: 12px; width: 100%;
  padding: 10px 10px; border-radius: 11px; background: transparent; border: 1px solid transparent; text-align: left;
}
.kb-search-result.is-sel { background: var(--brand-soft); border-color: var(--brand-line); }
.kb-sr-ico { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 9px; background: var(--panel-2); color: var(--brand-ink); flex: none; border: 1px solid var(--border); }
.kb-search-result.is-sel .kb-sr-ico { background: var(--bg); border-color: var(--brand-line); }
.kb-sr-main { display: flex; flex-direction: column; min-width: 0; flex: 1; }
.kb-sr-title { font-weight: 560; font-size: 14.5px; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.kb-sr-meta { font-size: 12.5px; }
.kb-search-empty { text-align: center; padding: 36px 20px 40px; display: flex; flex-direction: column; align-items: center; gap: 8px; }
.kb-search-empty p { margin: 0; }
.kb-search-foot { display: flex; align-items: center; gap: 16px; padding: 10px 16px; border-top: 1px solid var(--border); background: var(--panel-2); font-size: 12px; color: var(--text-muted); }
.kb-search-foot kbd { margin-right: 3px; }