/* Header & Navigation Styles - Premium Design */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
}

.site-header.scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
  border-bottom-color: transparent;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
  gap: var(--space-8);
}

/* Logo / Doctor Name */
.site-logo {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  text-decoration: none;
  transition: transform var(--transition-base);
}

.site-logo:hover {
  transform: translateX(2px);
}

.site-logo h1 {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
  transition: color var(--transition-base);
}

.site-logo:hover h1 {
  color: var(--color-primary);
}

.site-logo .specialty {
  font-size: var(--text-xs);
  color: var(--color-secondary);
  font-weight: 500;
  letter-spacing: 0.02em;
}

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

.main-nav a {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition-base);
  border-radius: var(--radius-base);
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transition: width var(--transition-base);
  border-radius: 1px;
}

.main-nav a:hover {
  color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.main-nav a:hover::after {
  width: 60%;
}

.main-nav a.active {
  color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.main-nav a.active::after {
  width: 60%;
}

/* CTA Button in Header */
.header-cta {
  margin-left: var(--space-4);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-base);
  transition: background-color var(--transition-base);
}

.mobile-menu-toggle:hover {
  background-color: var(--color-primary-light);
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2.5px;
  background-color: var(--color-text);
  transition: all var(--transition-base);
  border-radius: 2px;
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
  background-color: var(--color-primary);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: translateX(-10px);
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
  background-color: var(--color-primary);
}

/* Mobile Navigation */
@media (max-width: 768px), (hover: none) and (pointer: coarse) {
  .mobile-menu-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: 300px;
    height: 100vh;
    background: linear-gradient(180deg, white 0%, var(--color-section-sage) 100%);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-24) var(--space-6) var(--space-6);
    box-shadow: var(--shadow-xl);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    border-left: 1px solid var(--color-border-light);
  }

  .main-nav.active {
    transform: translateX(0);
  }

  .main-nav a {
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border-light);
    border-radius: 0;
  }

  .main-nav a::after {
    display: none;
  }

  .main-nav a:hover,
  .main-nav a.active {
    background-color: var(--color-primary-light);
  }

  .header-cta {
    margin-left: 0;
    margin-top: var(--space-4);
  }

  .header-cta .btn {
    width: 100%;
  }

  /* Overlay */
  .mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(15, 82, 87, 0.3);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-slow);
    z-index: 999;
  }

  .mobile-overlay.active {
    opacity: 1;
    pointer-events: auto;
  }

  .site-logo h1 {
    font-size: var(--text-base);
  }

  .site-logo .specialty {
    font-size: var(--text-xs);
  }
}

@media (max-width: 480px), (hover: none) and (pointer: coarse) {
  .header-container {
    padding-top: var(--space-3);
    padding-bottom: var(--space-3);
  }

  .site-logo h1 {
    font-size: var(--text-base);
  }
}

/* Make the header appointment CTA clearly distinguishable from the navigation background. */
.header-cta .btn-primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  border-color: var(--color-accent);
  color: #fff;
  box-shadow: 0 8px 20px -8px rgb(193 127 89 / 0.5);
}

.header-cta .btn-primary:hover {
  color: #fff;
  box-shadow: 0 12px 28px -8px rgb(193 127 89 / 0.55);
}