/* ==========================================================================
   Header — utility bar, logo/search/actions row, category nav, drawer.
   Markup: js/components/header.js
   ========================================================================== */

site-header {
  display: block;
  position: sticky;
  top: -32px;                /* utility bar scrolls away, rest stays */
  z-index: 100;
  background: #fff;
}
site-header.is-scrolled { box-shadow: 0 1px 8px rgba(0,0,0,.06); }
html.is-locked { overflow: hidden; }

/* ---------- Utility bar ---------- */
.topbar { height: 32px; background: var(--surface-muted); border-bottom: 1px solid var(--border); font-size: .8125rem; color: var(--muted); }
.topbar__inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.topbar__info { margin: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.topbar__info a { color: var(--muted); font-weight: 600; }
.topbar__more { display: none; }
@media (min-width: 900px) { .topbar__more { display: inline; } }
.topbar__links { display: none; list-style: none; }
.topbar__links li + li::before { content: "|"; margin: 0 14px; color: var(--border-strong); }
.topbar__links a { color: var(--muted); }
.topbar__links li:last-child a { font-weight: 600; color: var(--heading); }
.topbar__links a:hover { color: var(--primary); }
@media (min-width: 768px) { .topbar__links { display: flex; } }

/* ---------- Logo / search / actions ---------- */
.masthead { border-bottom: 1px solid var(--border); }
.masthead__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas: "brand . actions" "search search search";
  align-items: center;
  gap: 10px 16px;
  padding-block: 10px;
}
@media (min-width: 1024px) {
  .masthead__inner { grid-template-areas: "brand search actions"; height: 80px; padding-block: 0; gap: 32px; }
}
.brand { grid-area: brand; display: block; }
.brand img { height: 44px; width: auto; }
@media (min-width: 1024px) { .brand img { height: 50px; } }

.hsearch { grid-area: search; position: relative; display: flex; max-width: 680px; width: 100%; }
@media (min-width: 1024px) { .hsearch { justify-self: center; } }
.hsearch__input {
  flex: 1;
  min-width: 0;
  height: 44px;
  padding: 0 16px;
  border: 1px solid var(--border-strong);
  border-right: 0;
  border-radius: 0;
  background: #fff;
  font-size: .9375rem;
}
.hsearch__input:focus { outline: none; border-color: var(--primary); }
.hsearch__btn {
  display: grid;
  place-items: center;
  width: 46px;
  height: 44px;
  border: 0;
  border-radius: 0;
  background: var(--primary);
  color: #fff;
}
.hsearch__btn:hover { background: var(--primary-dark); }
.hsearch__btn .icon { font-size: 1.4rem; }
.hsearch__results {
  position: absolute;
  top: 100%; left: 0; right: 0;
  z-index: 20;
  max-height: 60vh;
  overflow-y: auto;
  list-style: none;
  background: #fff;
  border: 1px solid var(--border-strong);
  border-top: 0;
  box-shadow: 0 10px 24px rgba(0,0,0,.08);
}
.hsearch__results a { display: flex; align-items: center; gap: 12px; padding: 10px 14px; color: var(--text); border-bottom: 1px solid var(--surface-muted); }
.hsearch__results a:hover, .hsearch__results a.is-active { background: var(--surface-soft); text-decoration: none; }
.hsearch__results img, .hsearch__results a > .icon { width: 48px; height: 36px; object-fit: contain; background: var(--surface-muted); display: grid; place-items: center; color: var(--primary); mix-blend-mode: multiply; }
.hsearch__results span { display: flex; flex-direction: column; min-width: 0; }
.hsearch__results strong { font-family: var(--font-head); font-weight: 600; font-size: .875rem; color: var(--heading); }
.hsearch__results small { font-size: .75rem; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hsearch__empty { padding: 14px; font-size: .875rem; color: var(--muted); }

.masthead__actions { grid-area: actions; display: flex; align-items: center; gap: 6px; }
@media (min-width: 1024px) { .masthead__actions { gap: 24px; } }
.hlink { display: inline-flex; align-items: center; gap: 6px; font-family: var(--font-body); font-size: .8125rem; font-weight: 600; letter-spacing: .03em; text-transform: uppercase; color: var(--heading); white-space: nowrap; }
.hlink:hover { color: var(--primary); text-decoration: none; }
.hlink .icon { font-size: 1.4rem; color: var(--heading); }
.hlink:hover .icon { color: var(--primary); }
.hlink--code, .hlink--samples { display: none; }
@media (min-width: 1280px) { .hlink--code, .hlink--samples { display: inline-flex; } }
.hlink__text { display: none; }
@media (min-width: 600px) { .hlink__text { display: inline; } }
.hlink__count {
  display: inline-grid;
  place-items: center;
  min-width: 20px;
  height: 20px;
  padding: 0 5px;
  background: var(--red);
  color: #fff;
  font-size: .6875rem;
  font-weight: 700;
}
.hlink__count.is-bump { animation: bump .4s; }
@keyframes bump { 50% { transform: scale(1.35); } }

.icon-btn { display: inline-grid; place-items: center; width: 42px; height: 42px; border: 0; background: transparent; color: var(--heading); }
.icon-btn:hover { color: var(--primary); }
.icon-btn .icon { font-size: 1.6rem; }
@media (min-width: 1180px) { .masthead__menu { display: none; } }

/* ---------- Category nav ---------- */
.catnav { display: none; border-bottom: 1px solid var(--border); background: #fff; }
@media (min-width: 1180px) { .catnav { display: block; } }
.catnav__list { display: flex; align-items: stretch; height: 46px; list-style: none; gap: 4px; }
.catnav__item { position: relative; display: flex; }
.catnav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 0 14px;
  border: 0;
  background: none;
  color: var(--heading);
  font-family: var(--font-body);
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  white-space: nowrap;
}
.catnav__item:first-child .catnav__link { padding-left: 0; }
.catnav__link .icon { font-size: 1.15rem; transition: transform .15s; }
.catnav__link:hover, .catnav__item.is-open > .catnav__link { color: var(--primary); text-decoration: none; }
.catnav__link.is-active { color: var(--primary); font-weight: 700; }
.catnav__link.is-active::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: -1px;
  height: 2px;
  background: var(--primary);
}
.catnav__item:first-child .catnav__link.is-active::after { left: 0; }
.catnav__item.is-open .catnav__toggle .icon { transform: rotate(180deg); }

.catnav__drop {
  position: absolute;
  top: 100%; left: 0;
  z-index: 30;
  min-width: 280px;
  padding: 8px 0;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: 0 10px 24px rgba(0,0,0,.08);
  display: none;
}
.catnav__item.is-open > .catnav__drop { display: block; }
.catnav__drop ul { list-style: none; }
.catnav__drop a { display: flex; align-items: center; gap: 8px; padding: 9px 18px; color: var(--text); font-size: .875rem; }
.catnav__drop a:hover { background: var(--surface-muted); color: var(--primary); text-decoration: none; }
.catnav__all { margin-top: 6px; border-top: 1px solid var(--border); font-family: var(--font-head); font-weight: 600; color: var(--primary) !important; }

/* ---------- Mobile drawer ---------- */
.drawer { position: fixed; inset: 0; z-index: 200; visibility: hidden; }
.drawer.is-open { visibility: visible; }
.drawer__backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.45); opacity: 0; transition: opacity .25s; }
.drawer.is-open .drawer__backdrop { opacity: 1; }
.drawer__panel {
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: min(380px, 90vw);
  display: flex;
  flex-direction: column;
  background: #fff;
  transform: translateX(100%);
  transition: transform .3s ease;
  overflow-y: auto;
}
.drawer.is-open .drawer__panel { transform: none; }
.drawer__head { display: flex; align-items: center; justify-content: space-between; padding: 12px 12px 12px 20px; border-bottom: 1px solid var(--border); }
.drawer__nav { flex: 1; padding: 4px 20px; }
.drawer__link, .drawer__group summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  color: var(--heading);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: .9375rem;
  cursor: pointer;
  list-style: none;
}
.drawer__link:hover { text-decoration: none; color: var(--primary); }
.drawer__group summary::-webkit-details-marker { display: none; }
.drawer__group[open] summary .icon { transform: rotate(180deg); }
.drawer__sub { padding: 6px 0 10px; border-bottom: 1px solid var(--border); }
.drawer__sub ul { list-style: none; }
.drawer__sub a { display: block; padding: 7px 12px; color: var(--text); font-size: .875rem; }
.drawer__foot { display: grid; gap: 10px; padding: 20px; background: var(--surface-muted); }
.drawer__foot p { margin: 0; text-align: center; }

/* ---------- Motion ---------- */
.catnav__link::before {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: -1px;
  height: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s var(--ease-out);
}
.catnav__item:first-child .catnav__link::before { left: 0; }
.catnav__link:hover::before, .catnav__item.is-open > .catnav__link::before { transform: scaleX(1); }
.catnav__link { transition: color .2s; }

.catnav__drop {
  display: block;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity .2s var(--ease-out), transform .2s var(--ease-out), visibility .2s;
}
.catnav__item.is-open > .catnav__drop { opacity: 1; visibility: visible; transform: none; }
.catnav__drop a { transition: background-color .15s, color .15s, padding-left .2s var(--ease-out); }
.catnav__drop a:hover { padding-left: 22px; }

.hsearch__results:not([hidden]) { animation: fadeIn .2s; }
.hlink .icon { transition: transform .2s var(--ease-out), color .2s; }
.hlink:hover .icon { transform: translateY(-2px); }
site-header { transition: box-shadow .3s; }