/* File: assets/css/header.css
   Header pro + Off-canvas mobile
   Uses tokens from assets/css/variables.css
*/

/* Sticky header shell */
.site-header{
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: color-mix(in srgb, var(--color-ivory) 85%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid color-mix(in srgb, var(--color-line) 80%, transparent);
}

.site-header__inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 68px;
  padding-block: 10px;
}

/* Brand */
.brand{
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: var(--color-ink);
}
.brand__mark{
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background:
    radial-gradient(closest-side, color-mix(in srgb, var(--color-gold) 24%, transparent), transparent 70%),
    linear-gradient(135deg, color-mix(in srgb, var(--color-ink) 14%, transparent), transparent);
  border: 1px solid color-mix(in srgb, var(--color-ink) 10%, transparent);
  box-shadow: var(--shadow-xs);
  flex: 0 0 auto;
}
.brand__text{
  display: grid;
  min-width: 0;
  line-height: 1.1;
}
.brand__name{
  font-family: var(--font-serif);
  font-weight: var(--fw-bold);
  letter-spacing: .2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.brand__tag{
  font-size: var(--fs-0);
  color: var(--color-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Desktop nav */
.nav-desktop{
  display: none;
  align-items: center;
  gap: var(--space-2);
}
.nav-desktop ul{
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-desktop a{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: var(--radius-pill);
  color: var(--color-ink);
  font-weight: var(--fw-medium);
  transition: background var(--dur-2) var(--ease), color var(--dur-2) var(--ease);
}
.nav-desktop a:hover{
  background: color-mix(in srgb, var(--color-ink) 6%, transparent);
}
.nav-desktop .current-menu-item > a,
.nav-desktop .current_page_item > a{
  background: color-mix(in srgb, var(--color-gold) 16%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-gold) 35%, transparent);
}

/* Actions area */
.header-actions{
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

/* Burger */
.burger{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-pill);
  border: 1px solid color-mix(in srgb, var(--color-ink) 14%, transparent);
  background: var(--color-surface);
  box-shadow: var(--shadow-xs);
  transition: transform var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease), background var(--dur-2) var(--ease);
}
.burger:hover{
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.burger:focus-visible{
  outline: none;
  box-shadow: var(--focus-ring-ink);
}
.burger__icon{
  width: 18px;
  height: 12px;
  position: relative;
}
.burger__icon::before,
.burger__icon::after,
.burger__icon span{
  content: "";
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  border-radius: 2px;
  background: color-mix(in srgb, var(--color-ink) 80%, transparent);
}
.burger__icon::before{ top: 0; }
.burger__icon span{ top: 5px; }
.burger__icon::after{ bottom: 0; }

/* Off-canvas backdrop */
.oc-backdrop{
  position: fixed;
  inset: 0;
  background: var(--color-backdrop);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-3) var(--ease);
  z-index: var(--z-modal);
}

/* Off-canvas panel */
.offcanvas{
  position: fixed;
  inset: 0 0 0 auto;
  width: min(92vw, 360px);
  height: 100%;
  background: var(--color-surface);
  transform: translateX(102%);
  transition: transform var(--dur-3) var(--ease);
  z-index: calc(var(--z-modal) + 1);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
}

.offcanvas__top{
  padding: 14px var(--gutter);
  border-bottom: 1px solid var(--color-line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.offcanvas__title{
  display: grid;
  gap: 2px;
  min-width: 0;
}
.offcanvas__title strong{
  font-family: var(--font-serif);
  color: var(--color-ink);
  font-weight: var(--fw-bold);
  margin: 0;
}
.offcanvas__title span{
  font-size: var(--fs-0);
  color: var(--color-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.oc-close{
  width: 44px;
  height: 44px;
  border-radius: var(--radius-pill);
  border: 1px solid color-mix(in srgb, var(--color-ink) 14%, transparent);
  background: var(--color-surface);
  box-shadow: var(--shadow-xs);
}
.oc-close:focus-visible{
  outline: none;
  box-shadow: var(--focus-ring-ink);
}

.offcanvas__body{
  padding: 14px var(--gutter);
  overflow: auto;
}

.nav-mobile ul{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.nav-mobile a{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-line);
  background: var(--color-surface-2);
  color: var(--color-ink);
  font-weight: var(--fw-semibold);
  transition: transform var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease), background var(--dur-2) var(--ease);
}
.nav-mobile a:hover{
  transform: translateY(-1px);
  box-shadow: var(--shadow-xs);
  background: color-mix(in srgb, var(--color-surface-2) 70%, var(--color-surface));
}

.nav-mobile .current-menu-item > a,
.nav-mobile .current_page_item > a{
  border-color: color-mix(in srgb, var(--color-gold) 35%, var(--color-line));
  background: color-mix(in srgb, var(--color-gold) 14%, transparent);
}

/* Open state toggled by body class */
body.oc-open{
  overflow: hidden;
}
body.oc-open .oc-backdrop{
  opacity: 1;
  pointer-events: auto;
}
body.oc-open .offcanvas{
  transform: translateX(0);
}

/* Desktop breakpoint */
@media (min-width: 980px){
  .nav-desktop{ display: inline-flex; }
  .burger{ display: none; }
  .offcanvas, .oc-backdrop{ display: none; }
}