/* ============================================
   Header Styles - WL Carpet Installer
   ============================================ */

.header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--color-white);
  box-shadow: var(--shadow-md);
  z-index: var(--z-sticky);
  transition: all var(--transition-base);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) var(--spacing-md);
  max-width: var(--container-2xl);
  margin: 0 auto;
}

/* ============================================
   Logo
   ============================================ */

.header-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.header-logo:hover {
  opacity: 0.8;
}

.header-logo:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.logo-text {
  font-family: var(--font-heading);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  line-height: 1;
}

.logo-subtext {
  display: block;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-regular);
  color: var(--color-secondary);
  margin-top: 2px;
}

/* ============================================
   Navigation
   ============================================ */

.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

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

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-family: var(--font-heading);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-dark);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

.nav-link:hover {
  color: var(--color-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 80%;
}

.nav-link.active {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

/* Contact Button in Header */
.header-cta {
  margin-left: var(--spacing-md);
}

.header-cta .btn {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-sm);
}

/* ============================================
   Mobile Menu Toggle
   ============================================ */

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 24px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: var(--z-fixed);
}

.mobile-menu-toggle:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.mobile-menu-toggle span {
  width: 100%;
  height: 3px;
  background-color: var(--color-primary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  transform-origin: center;
}

/* Mobile Menu Toggle Animation */
.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(10.5px) rotate(45deg);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-10.5px) rotate(-45deg);
}

/* ============================================
   Phone Number in Header
   ============================================ */

.header-phone {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-left: var(--spacing-md);
  padding: var(--spacing-xs) var(--spacing-sm);
  font-family: var(--font-heading);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  text-decoration: none;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

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

.header-phone svg {
  width: 18px;
  height: 18px;
}

/* ============================================
   Responsive Styles
   ============================================ */

/* Tablet and below (max-width: 1023px) */
@media (max-width: 1023px) {
  .mobile-menu-toggle {
    display: flex;
  }
  
  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--color-white);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-2xl) var(--spacing-md);
    transition: right var(--transition-slow);
    overflow-y: auto;
  }
  
  .nav.active {
    right: 0;
  }
  
  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
    width: 100%;
  }
  
  .nav-item {
    width: 100%;
  }
  
  .nav-link {
    width: 100%;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
  }
  
  .nav-link:hover {
    background-color: var(--color-light);
  }
  
  .nav-link::after {
    display: none;
  }
  
  .header-cta {
    margin-left: 0;
    margin-top: var(--spacing-md);
    width: 100%;
  }
  
  .header-cta .btn {
    width: 100%;
    padding: var(--spacing-sm);
    font-size: var(--font-size-base);
  }
  
  .header-phone {
    margin-left: 0;
    margin-top: var(--spacing-sm);
    width: 100%;
    justify-content: center;
  }
  
  /* Mobile Menu Overlay */
  .nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: calc(var(--z-sticky) - 1);
  }
  
  .nav-overlay.active {
    opacity: 1;
    visibility: visible;
  }
}

/* Mobile only (max-width: 767px) */
@media (max-width: 767px) {
  .header-container {
    padding: var(--spacing-sm);
  }
  
  .logo-text {
    font-size: var(--font-size-xl);
  }
  
  .logo-subtext {
    font-size: 0.65rem;
  }
  
  .nav {
    width: 100%;
    max-width: 320px;
  }
}

/* Desktop (min-width: 1024px) */
@media (min-width: 1024px) {
  .header-container {
    padding: var(--spacing-md) var(--spacing-lg);
  }
  
  .nav-list {
    gap: var(--spacing-lg);
  }
  
  .header-phone {
    margin-left: var(--spacing-lg);
  }
}

/* Large Desktop (min-width: 1440px) */
@media (min-width: 1440px) {
  .nav-list {
    gap: var(--spacing-xl);
  }
}

/* ============================================
   Scrolled Header State
   ============================================ */

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

.header.scrolled .header-container {
  padding-top: var(--spacing-xs);
  padding-bottom: var(--spacing-xs);
}

.header.scrolled .logo-text {
  font-size: var(--font-size-xl);
}

/* ============================================
   Accessibility
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  .header,
  .nav,
  .nav-link::after,
  .mobile-menu-toggle span {
    transition: none;
  }
}

/* Focus visible for keyboard navigation */
.nav-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}