/* ═══════════════════════════════════════════════
   DiagnosKit — Header & Navigation
   ═══════════════════════════════════════════════ */

/* ── Header ── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-100);
  z-index: 500;
  transition: box-shadow var(--duration-normal) var(--ease-out);
}

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

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

/* ── Logo ── */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
  text-decoration: none;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-dark) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-blue);
}

.logo-icon svg {
  width: 22px;
  height: 22px;
  color: white;
}

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

.logo-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  color: var(--gray-900);
  letter-spacing: -0.02em;
}

.logo-name span {
  color: var(--blue);
}

.logo-tagline {
  font-size: 11px;
  color: var(--gray-500);
  font-weight: 400;
  letter-spacing: 0.01em;
}

/* ── Main Nav ── */
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-700);
  transition: all var(--duration-fast) var(--ease-out);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  background: var(--blue-light);
  color: var(--blue-dark);
}

/* ── Header Actions ── */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* ── Cart Button ── */
.cart-btn {
  position: relative;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--gray-700);
  background: var(--gray-100);
  transition: all var(--duration-fast) var(--ease-out);
  cursor: pointer;
}

.cart-btn:hover {
  background: var(--blue-light);
  color: var(--blue);
}

.cart-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  min-width: 18px;
  height: 18px;
  background: var(--green);
  color: var(--white);
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
  border: 2px solid var(--white);
  transform: scale(0);
  transition: transform var(--duration-normal) var(--ease-out);
}

.cart-badge.visible {
  transform: scale(1);
}

/* ── User Menu ── */
.user-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 12px 6px 6px;
  border-radius: var(--radius-full);
  background: var(--gray-100);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  border: 1.5px solid transparent;
}

.user-btn:hover {
  border-color: var(--blue);
  background: var(--blue-light);
}

.user-avatar {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--blue), var(--green));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.user-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-700);
  max-width: 100px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-chevron {
  color: var(--gray-500);
  transition: transform var(--duration-fast);
}

.user-btn.open .user-chevron {
  transform: rotate(180deg);
}

/* ── Dropdown Menu ── */
.dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  width: 220px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--duration-normal) var(--ease-out);
  overflow: hidden;
}

.dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-header {
  padding: 16px 16px 12px;
  border-bottom: 1px solid var(--gray-100);
}

.dropdown-user-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-900);
}

.dropdown-user-email {
  font-size: 12px;
  color: var(--gray-500);
  margin-top: 2px;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 11px 16px;
  font-size: 14px;
  color: var(--gray-700);
  cursor: pointer;
  transition: all var(--duration-fast);
}

.dropdown-item:hover {
  background: var(--blue-light);
  color: var(--blue-dark);
}

.dropdown-item svg {
  flex-shrink: 0;
  color: var(--gray-500);
}

.dropdown-item:hover svg {
  color: var(--blue);
}

.dropdown-item.danger { color: var(--status-error); }
.dropdown-item.danger:hover { background: #FEF2F2; color: #DC2626; }
.dropdown-item.danger svg { color: var(--status-error); }

.dropdown-divider {
  height: 1px;
  background: var(--gray-100);
  margin: 4px 0;
}

.user-wrapper {
  position: relative;
}

/* ── Mobile hamburger ── */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--gray-100);
  cursor: pointer;
  transition: background var(--duration-fast);
}

.hamburger:hover { background: var(--blue-light); }

.hamburger span {
  width: 18px;
  height: 2px;
  background: var(--gray-700);
  border-radius: 2px;
  transition: all var(--duration-normal) var(--ease-out);
}

.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 ── */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: var(--white);
  border-bottom: 1px solid var(--gray-100);
  padding: var(--space-4) var(--space-4) var(--space-6);
  box-shadow: var(--shadow-lg);
  transform: translateY(-100%);
  opacity: 0;
  transition: all var(--duration-normal) var(--ease-out);
  z-index: 499;
}

.mobile-nav.open {
  transform: translateY(0);
  opacity: 1;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
}

.mobile-nav-link {
  padding: 12px 14px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  color: var(--gray-700);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  transition: all var(--duration-fast);
}

.mobile-nav-link:hover {
  background: var(--blue-light);
  color: var(--blue-dark);
}

.mobile-nav-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-top: var(--space-4);
  border-top: 1px solid var(--gray-100);
}

/* ── Page top padding ── */
.page-content {
  padding-top: var(--header-h);
}

@media (max-width: 900px) {
  .main-nav { display: none; }
  .hamburger { display: flex; }
  .mobile-nav { display: block; }
  .logo-tagline { display: none; }
}

@media (max-width: 480px) {
  .logo-name { font-size: 18px; }
  .user-name { display: none; }
}