/* ═══════════════════════════════════════════════════════════════════
   DesignVerse — Header Component
   ═══════════════════════════════════════════════════════════════════ */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-base), background var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

/* ── Header Inner ─────────────────────────────────────────────────── */
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  height: var(--header-height);
}

/* ── Logo ─────────────────────────────────────────────────────────── */
.site-logo,
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
  text-decoration: none;
}

.logo-mark {
  display: inline-block;
  width: 36px;
  height: 36px;
  object-fit: contain;
  flex-shrink: 0;
  background: transparent;
  border-radius: 0;
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: var(--tracking-tight);
}

.main-nav {
  flex: 1;
  display: flex;
  justify-content: flex-start;
  margin-left: var(--space-4);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--space-3);
  right: var(--space-3);
  height: 2px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

/* ── Header Actions ───────────────────────────────────────────────── */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.btn-icon:hover {
  color: var(--color-text);
  background: var(--color-surface);
}

/* ── Dark Mode toggle icons ───────────────────────────────────────── */
.icon-moon { display: none; }

[data-theme="dark"] .icon-sun  { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

/* ── Mobile hamburger ─────────────────────────────────────────────── */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
}

.hamburger-line {
  display: block;
  height: 2px;
  background: var(--color-text);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  width: 20px;
}

.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Category Bar ─────────────────────────────────────────────────── */
.category-bar {
  border-top: 1px solid var(--color-border);
  position: relative;
  z-index: var(--z-sticky);
}

.category-bar-list {
  display: flex;
  align-items: center;
  gap: 0;
  width: 100%;
}

.category-bar-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 1 1 0;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-align: center;
}

.category-bar-link:hover,
.category-bar-link.active {
  color: var(--color-text);
  border-bottom-color: var(--cat-color, var(--color-accent));
}

.category-bar-count {
  display: none; /* counts removed per UI request */
}

/* More dropdown for category bar */
.category-more { position: relative; }
.category-more-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1 1 0;
  background: transparent;
  border: none;
  padding: var(--space-3) var(--space-5);
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: color var(--transition-fast);
}
.category-more-toggle:hover {
  color: var(--color-text);
}
.category-more-toggle[aria-expanded="true"] {
  color: var(--color-text);
}
.category-more-toggle .chevron {
  margin-left: var(--space-2);
  transition: transform var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}
.category-more-toggle[aria-expanded="true"] .chevron {
  transform: rotate(180deg);
}
.category-more-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
  min-width: 220px;
  z-index: calc(var(--z-sticky) + 10);
  overflow: hidden;
}
.category-more-dropdown[hidden] {
  display: none !important;
}
.category-more-dropdown li {
  list-style: none;
  border-bottom: 1px solid var(--color-border);
}
.category-more-dropdown li:last-child {
  border-bottom: none;
}
.category-more-dropdown .category-bar-link {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  flex: none;
  padding: var(--space-3) var(--space-5);
  border-bottom: none;
  font-weight: 500;
}
.category-more-dropdown .category-bar-link:hover {
  background: var(--color-bg-muted);
  color: var(--color-text);
}

/* ── Search Overlay ───────────────────────────────────────────────── */
.search-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
  padding-inline: var(--container-padding);
}

.search-overlay[hidden] {
  display: none !important;
}

.search-overlay-inner {
  position: relative;
  width: 100%;
  max-width: 680px;
  animation: slideDown 0.2s ease;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.search-label {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-6);
  text-align: center;
}

.search-input-wrap {
  position: relative;
}

.search-input {
  width: 100%;
  height: 64px;
  padding: 0 60px 0 var(--space-6);
  font-size: var(--text-lg);
  background: var(--color-bg-card);
  border: 2px solid transparent;
  border-radius: var(--radius-xl);
  color: var(--color-text);
  box-shadow: var(--shadow-xl);
  transition: border-color var(--transition-fast);
}
.search-input:focus {
  border-color: var(--color-accent);
  outline: none;
}
.search-input::placeholder {
  color: var(--color-text-muted);
}

.search-submit {
  position: absolute;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}
.search-submit:hover {
  color: var(--color-accent);
}

.search-suggestions {
  margin-top: var(--space-3);
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
}

.search-suggestion-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-fast);
  cursor: pointer;
}
.search-suggestion-item:last-child { border-bottom: none; }
.search-suggestion-item:hover { background: var(--color-bg-muted); }

.search-close {
  position: absolute;
  top: calc(-1 * var(--space-12));
  right: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.8);
  transition: color var(--transition-fast);
}
.search-close:hover { color: #fff; }

/* ── Responsive ───────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4) var(--container-padding) var(--space-6);
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
    justify-content: flex-start;
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-1);
    width: 100%;
  }

  .nav-link {
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-md);
    width: 100%;
  }

  .nav-link::after {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }
}

@media (max-width: 480px) {
  .logo-text {
    display: none;
  }
}