/* =============================================================================
   ERGOTHERAPIEPRAXIS LEA FREIBOTT — Header Styles
   ============================================================================= */

/* =============================================================================
   1. SITE HEADER
   ============================================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  height: calc(var(--header-height) + var(--space-4));
  width: 100%;
  padding-top: var(--space-4);

  /* Initial state: transparent / match beige background */
  background: transparent;
  border-bottom: 1px solid transparent;
  box-shadow: none;

  transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

/* Scrolled state: pure white with soft shadow */
.site-header.is-scrolled {
  background: #ffffff; /* STRICT: pure white */
  border-bottom: 1px solid var(--color-border-light);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
}

/* =============================================================================
   2. HEADER INNER LAYOUT
   ============================================================================= */
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-4);
}

/* =============================================================================
   3. LOGO
   ============================================================================= */
.site-logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  text-decoration: none;
  gap: var(--space-3);
  transition: opacity var(--transition-fast);
}

.site-logo:hover {
  opacity: 0.85;
}

.site-logo img {
  height: 48px;
  width: auto;
  object-fit: contain;
}

/* =============================================================================
   4. PRIMARY NAVIGATION
   ============================================================================= */
.primary-nav {
  display: flex;
  align-items: center;
  flex: 1;
  justify-content: center;
}

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
}

.nav-item {
  position: relative;
}

/* Nav link base */
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-full); /* Pill shape for active/hover */
  white-space: nowrap;
  transition:
    color            var(--transition-fast),
    background-color var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-text);
  background: var(--color-primary-subtle);
}

/* Active State: Soft var(--primary) background pill */
.nav-link.is-active {
  color: var(--color-text);
  font-weight: var(--fw-semi);
  background: var(--color-primary-subtle);
}

/* Dropdown chevron icon */
.nav-link--has-dropdown .nav-chevron {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  transition: transform var(--transition-base);
  color: var(--color-text-light);
}

.nav-item:hover .nav-chevron,
.nav-item:focus-within .nav-chevron {
  transform: rotate(180deg);
  color: var(--color-primary-dark);
}

/* =============================================================================
   5. DROPDOWN MENU
   ============================================================================= */
.dropdown {
  position: absolute;
  top: calc(100% + var(--space-4));
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  min-width: 240px;
  background: #ffffff; /* STRICT: pure white */
  border: 1px solid var(--color-border-light);
  border-radius: 8px; /* Rounded corners */
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05); /* Premium soft drop-shadow */
  padding: var(--space-3);
  list-style: none;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity    var(--transition-base),
    transform  var(--transition-base),
    visibility var(--transition-base);
  z-index: var(--z-dropdown);
}

/* Invisible bridge to prevent hover gap bug */
.dropdown::after {
  content: '';
  position: absolute;
  bottom: 100%; /* Position above the dropdown */
  left: 0;
  right: 0;
  height: var(--space-6); /* Bridge the gap */
  background: transparent;
}

/* Arrow tip */
.dropdown::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 12px;
  background: #ffffff; /* STRICT: pure white */
  border-top: 1px solid var(--color-border-light);
  border-left: 1px solid var(--color-border-light);
  transform: translateX(-50%) rotate(45deg);
  z-index: 1;
}

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

.dropdown-item {
  display: block;
  position: relative;
  z-index: 2;
}

.dropdown-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition:
    color            var(--transition-fast),
    background-color var(--transition-fast);
}

.dropdown-link:hover,
.dropdown-link:focus-visible {
  background: var(--color-surface-alt); /* Subtle warm off-white hover */
  color: var(--color-text);
}

/* =============================================================================
   6. HEADER ACTIONS (CTA + mobile trigger)
   ============================================================================= */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}

/* Phone quick-link */
.header-phone {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--fw-semi);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.header-phone:hover {
  color: var(--color-primary-dark);
}

.header-phone svg {
  width: 18px;
  height: 18px;
  color: var(--color-primary);
}

/* =============================================================================
   7. HAMBURGER BUTTON
   ============================================================================= */
.hamburger-btn {
  display: none; /* Hidden on desktop */
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
  padding: var(--space-2);
  flex-shrink: 0;
}

.hamburger-btn:hover {
  background: var(--color-primary-subtle);
}

.hamburger-btn .bar {
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: var(--radius-full);
  transform-origin: center;
  transition:
    transform  var(--transition-base),
    opacity    var(--transition-base),
    width      var(--transition-base);
}

/* Animated to X when open */
.hamburger-btn[aria-expanded="true"] .bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger-btn[aria-expanded="true"] .bar:nth-child(2) {
  opacity: 0;
  width: 0;
}
.hamburger-btn[aria-expanded="true"] .bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* =============================================================================
   8. MOBILE NAV OVERLAY
   ============================================================================= */
.mobile-nav {
  display: none; /* controlled via JS class */
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  pointer-events: none;
}

/* Backdrop */
.mobile-nav__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(45, 45, 45, 0.4);
  backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity var(--transition-slow);
}

/* Drawer panel */
.mobile-nav__panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(360px, 90vw);
  background: var(--color-bg);
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

/* Panel header */
.mobile-nav__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border-light);
  flex-shrink: 0;
}

.mobile-nav__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.mobile-nav__close:hover {
  background: var(--color-primary-subtle);
  color: var(--color-text);
}

.mobile-nav__close svg {
  width: 20px;
  height: 20px;
}

/* Mobile nav links */
.mobile-nav__body {
  flex: 1;
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.mobile-nav__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-4);
  font-size: var(--text-md);
  font-weight: var(--fw-medium);
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition:
    color            var(--transition-fast),
    background-color var(--transition-fast);
}

.mobile-nav__link:hover {
  background: var(--color-primary-subtle);
  color: var(--color-primary-dark);
}

/* Mobile submenu toggle */
.mobile-nav__toggle-btn {
  width: 32px;
  height: 32px;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--transition-fast), transform var(--transition-base);
}

.mobile-nav__toggle-btn svg {
  width: 16px;
  height: 16px;
  color: var(--color-text-secondary);
  transition: transform var(--transition-base);
}

.mobile-nav__toggle-btn[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

/* Mobile submenu */
.mobile-nav__submenu {
  list-style: none;
  padding: 0 0 0 var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  overflow: hidden;
  max-height: 0;
  transition:
    max-height var(--transition-slow),
    padding var(--transition-slow);
}

.mobile-nav__submenu.is-open {
  max-height: 400px;
  padding-block: var(--space-2);
}

.mobile-nav__submenu-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--fw-regular);
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition:
    color            var(--transition-fast),
    background-color var(--transition-fast);
}

.mobile-nav__submenu-link::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  flex-shrink: 0;
}

.mobile-nav__submenu-link:hover {
  background: var(--color-primary-subtle);
  color: var(--color-text);
}

/* Mobile footer area */
.mobile-nav__footer {
  padding: var(--space-6);
  border-top: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex-shrink: 0;
}

.mobile-nav__contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mobile-nav__contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  text-decoration: none;
}

.mobile-nav__contact-item svg {
  width: 14px;
  height: 14px;
  color: var(--color-primary-dark);
  flex-shrink: 0;
}

/* Open state */
.mobile-nav.is-open {
  display: block;
  pointer-events: auto;
}

.mobile-nav.is-open .mobile-nav__backdrop {
  opacity: 1;
}

.mobile-nav.is-open .mobile-nav__panel {
  transform: translateX(0);
}

/* Body lock when nav open */
body.nav-open {
  overflow: hidden;
}

/* =============================================================================
   9. RESPONSIVE BREAKPOINTS
   ============================================================================= */
@media (max-width: 1024px) {
  .primary-nav {
    display: none;
  }

  .header-phone {
    display: none;
  }

  .hamburger-btn {
    display: flex;
  }

  /* Show compact CTA on tablet */
  .header-actions .btn--primary {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
  }
}

@media (max-width: 640px) {
  .site-header {
    height: var(--header-height-sm);
  }

  .site-logo img {
    height: 40px;
  }

  .site-logo__sub {
    display: none;
  }

  /* Hide CTA on very small screens to prevent horizontal overflow (it's inside the hamburger menu) */
  .header-actions .btn--primary {
    display: none;
  }
}