/* ═══════════════════════════════════════════════════════════════════════════
   Header & Navigation CSS
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── HEADER ─────────────────────────────────────────────────────────────── */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 900;
  height: var(--header-h);
  transition: all var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--sp-md);
  padding: var(--sp-sm) 0;
}

/* Transparent on top */
#site-header.header-top {
  background: linear-gradient(180deg, rgba(255,255,255,1) 0%, rgba(255,255,255,0.8) 100%);
  border-bottom: 1px solid transparent;
}

/* Scrolled: Premium glassmorphism */
#site-header.header-scrolled {
  background: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

/* ─── LOGO ───────────────────────────────────────────────────────────────── */
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo {
  height: 52px;
  width: auto;
  object-fit: contain;
  display: block;
  transition: transform var(--transition);
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.05));
}

.logo:hover .site-logo {
  transform: scale(1.04);
}

@media (max-width: 640px) {
  .site-logo { height: 34px; }
}
@media (max-width: 380px) {
  .site-logo { height: 28px; }
}

.logo__img {
  height: 48px;
  width: auto;
  object-fit: contain;
  transition: transform var(--transition);
}

.logo:hover .logo__img {
  transform: scale(1.05);
}

.logo__img {
  height: 48px;
  width: auto;
  object-fit: contain;
  transition: transform var(--transition);
}

@media (max-width: 640px) {
  .logo__img { height: 34px; }
}
@media (max-width: 380px) {
  .logo__img { height: 28px; }
}

.logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.card__excerpt {
  font-size: 0.875rem;
  color: var(--clr-text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--sp-md);
}

/* ─── MAIN NAV ───────────────────────────────────────────────────────────── */
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}

.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--clr-text-muted);
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--clr-text);
  background: rgba(0,0,0,0.05);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--clr-accent);
}

/* Dropdown nav item */
.nav-item { position: relative; }

.nav-dropdown {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 200px;
  background: #ffffff;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(-8px);
  transition: all var(--transition-fast);
  z-index: 100;
}

/* Bridge the gap between trigger and dropdown to prevent closing prematurely */
.nav-dropdown::before {
  content: '';
  position: absolute;
  top: -15px;
  left: 0;
  right: 0;
  height: 15px;
  background: transparent;
}

.nav-item:hover .nav-dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--clr-text-muted);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.nav-dropdown a:hover {
  background: rgba(0,0,0,0.05);
  color: var(--clr-primary);
}

.nav-dropdown a i {
  width: 16px;
  font-size: 0.8rem;
  color: var(--clr-accent);
}

/* ─── HEADER ACTIONS ─────────────────────────────────────────────────────── */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  flex-shrink: 0;
}

@media (max-width: 640px) {
  .header-actions {
    gap: 8px;
  }
}

/* Search toggle button */
.search-toggle {
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 16px;
  width: auto;
  border-radius: var(--radius-full);
  background: #ffffff;
  border: 1px solid var(--clr-border);
  color: var(--clr-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.search-toggle--prominent {
  background: #f9f9f9;
  border-color: var(--clr-border);
  color: var(--clr-text);
  font-weight: 600;
}

.search-toggle__label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

@media (max-width: 640px) {
  .search-toggle__label { display: none; }
  .search-toggle--prominent { width: 38px; padding: 0; }
}

.search-toggle:hover {
  background: rgba(0,0,0,0.05);
  border-color: var(--clr-primary);
  color: var(--clr-accent);
}

/* User avatar menu */
.user-menu {
  position: relative;
}

.user-menu__trigger {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px 6px 6px;
  border-radius: var(--radius-full);
  background: #ffffff;
  border: 1px solid var(--clr-border);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.user-menu__trigger:hover {
  background: #f9f9f9;
  border-color: var(--clr-text);
}

@media (max-width: 640px) {
  .user-menu__trigger {
    padding: 4px;
  }
}

.user-menu__trigger .avatar { width: 30px; height: 30px; }

.user-menu__name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--clr-text);
  max-width: 100px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-menu__dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 200px;
  background: #ffffff;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  z-index: 100;
}

.user-menu:hover .user-menu__dropdown,
.user-menu.open .user-menu__dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.user-menu__dropdown a,
.user-menu__dropdown button {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--clr-text-muted);
  width: 100%;
  text-align: left;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  background: none;
  border: none;
}

.user-menu__dropdown a:hover,
.user-menu__dropdown button:hover {
  background: rgba(0,0,0,0.05);
  color: var(--clr-text);
}

.user-menu__dropdown .divider {
  margin: 6px 0;
  height: 1px;
}

.user-menu__dropdown .logout {
  color: #000;
}
.user-menu__dropdown .logout:hover { background: rgba(0,0,0,0.05); }

/* ─── HEADER SEARCH PANEL ────────────────────────────────────────────────── */
.header-search-panel {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 100vh;
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  padding: var(--sp-xl) 0;
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 1000;
}

.header-search-panel.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

/* ─── MOBILE MENU TOGGLE ─────────────────────────────────────────────────── */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: #ffffff;
  border: 1px solid var(--clr-border);
  cursor: pointer;
  transition: all var(--transition-fast);
  z-index: 1001;
}

.hamburger:hover {
  background: rgba(0,0,0,0.05);
  border-color: var(--clr-primary);
}

.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: all var(--transition);
  transform-origin: center;
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ─── MOBILE NAV OVERLAY ─────────────────────────────────────────────────── */
.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255,255,255,0.98);
  z-index: 800;
  flex-direction: column;
  padding: calc(var(--header-h) + 20px) var(--sp-lg) var(--sp-xl);
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform var(--transition);
}

.mobile-nav.open {
  display: flex;
  transform: translateX(0);
  box-shadow: -10px 0 30px rgba(0,0,0,0.1);
}

.mobile-nav__logo {
  position: absolute;
  top: 16px;
  left: var(--sp-lg);
}

.mobile-nav__links {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.mobile-nav__link {
  padding: 14px var(--sp-md);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--clr-text-muted);
  text-decoration: none;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: var(--sp-md);
  transition: all var(--transition-fast);
  border-bottom: 1px solid var(--clr-border);
}

.mobile-nav__link:hover,
.mobile-nav__link.active {
  color: var(--clr-text);
  background: rgba(0,0,0,0.05);
  border-bottom-color: var(--clr-border);
}

.mobile-nav__link i { width: 20px; color: var(--clr-accent); }

.mobile-nav__cta {
  margin-top: var(--sp-xl);
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
}

.mobile-nav__user {
  display: flex;
  align-items: center;
  gap: var(--sp-md);
  padding: var(--sp-md);
  background: #f9f9f9;
  border-radius: var(--radius-lg);
  margin-bottom: var(--sp-lg);
  border: 1px solid var(--clr-border);
}

/* ─── TOP BAR ────────────────────────────────────────────────────────────── */
.top-bar {
  background: #000000;
  height: 36px;
  display: flex;
  align-items: center;
  font-size: 0.75rem;
  color: #ffffff;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 901;
}

.top-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.top-bar a { color: #fff; }
.top-bar a:hover { color: var(--clr-gold); }

/* When top-bar present, push header down */
.has-top-bar #site-header { top: 36px; }
.has-top-bar .page-offset { padding-top: calc(var(--header-h) + 36px); }

/* ─── RESPONSIVE ─────────────────────────────────────────────────────────── */
@media (max-width: 920px) {
  .main-nav { display: none; }
  .hamburger { display: flex; }
  .logo__text .logo__sub { display: none; }
}

@media (max-width: 640px) {
  :root { --header-h: 72px; }
  .logo__title { font-size: 1rem; }
  .logo__sub { display: none; }
  .header-actions .btn { display: none; }
  .search-toggle { padding: 0 10px; height: 38px; }
  .search-toggle__label { display: none; }
  .hamburger { width: 38px; height: 38px; }
}

@media (max-width: 360px) {
  .header-inner { gap: 8px; }
  .header-actions { gap: 4px; }
}