/* header.css */
/* Solid aubergine by default (visible on every page). Transparent only over a hero. */
.site-header { position: fixed; inset-block-start: 0; inset-inline: 0; z-index: 50;
  height: var(--header-h); display: flex; align-items: center;
  transition: background var(--dur-micro) var(--ease), box-shadow var(--dur-micro) var(--ease);
  background: var(--color-primary);
  box-shadow: 0 1px 0 var(--color-accent), var(--shadow-md); }
/* Pages without a hero need their content pushed below the fixed header */
body:not(.has-hero) { padding-block-start: var(--header-h); }
/* Over the hero: transparent until scrolled */
body.has-hero .site-header:not(.is-scrolled) { background: transparent; box-shadow: none;
  -webkit-backdrop-filter: none; backdrop-filter: none; }
.site-header.is-scrolled { background: var(--color-primary);
  box-shadow: 0 1px 0 var(--color-accent), var(--shadow-md);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); }
.site-header.is-scrolled a, .site-header.is-scrolled .icon-btn { color: var(--color-on-primary); }
.header-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; gap: var(--space-lg); }
.main-nav { display: flex; gap: var(--space-lg); }
.main-nav ul { display: flex; gap: var(--space-lg); list-style: none; margin: 0; padding: 0; }
.main-nav li { list-style: none; }
.main-nav a { position: relative; color: var(--color-on-primary); font-weight: 500; }
.main-nav a::after { content: ""; position: absolute; inset-block-end: -4px; inset-inline: 0;
  height: 1.5px; background: var(--color-accent); transform: scaleX(0); transform-origin: inline-start;
  transition: transform var(--dur-micro) var(--ease); }
.main-nav a:hover::after { transform: scaleX(1); }
.brand img { filter: drop-shadow(0 1px 2px rgba(0,0,0,0.25)); }
.header-actions { display: flex; gap: var(--space-sm); align-items: center; }
.icon-btn { color: var(--color-on-primary); display: inline-flex; padding: 8px; border-radius: var(--radius-sm); }
.cart-trigger { position: relative; }
.cart-count { position: absolute; inset-block-start: 0; inset-inline-start: 0;
  background: var(--color-accent-strong); color: #fff; font-size: 0.7rem; min-width: 18px; height: 18px;
  border-radius: 9px; display: grid; place-items: center; }
[data-nav-toggle] { display: none; }

/* Header search panel (revealed by the search toggle) */
.header-search { position: absolute; inset-block-start: var(--header-h); inset-inline: 0;
  background: var(--color-primary); box-shadow: var(--shadow-md); padding-block: var(--space-md);
  border-block-start: 1px solid var(--color-accent); }
.header-search[hidden] { display: none; }
.header-search-inner { display: flex; align-items: center; gap: var(--space-sm); }
.header-search input[type="search"] { flex: 1; min-width: 0; font: inherit;
  padding: 12px 16px; border-radius: var(--radius-sm); border: 1px solid var(--color-border);
  background: var(--color-surface); color: var(--color-foreground); }
.header-search .icon-btn { color: var(--color-on-primary); }
@media (max-width: 900px) {
  .main-nav { display: none; }
  [data-nav-toggle] { display: inline-flex; }
  /* Mobile dropdown panel (opened by the hamburger) */
  .site-header.nav-open .main-nav {
    display: flex; flex-direction: column; gap: var(--space-md);
    position: fixed; inset-block-start: var(--header-h); inset-inline: 0;
    background: var(--color-primary); padding: var(--space-lg);
    box-shadow: var(--shadow-lg); border-block-start: 1px solid var(--color-accent);
  }
}