/* Header Component Styles */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: all var(--transition-base);
}

.header__container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.header__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  text-decoration: none;
}

.header__logo img {
  height: 64px;
  width: auto;
}

.header__logo svg {
  height: 48px;
  width: auto;
  fill: var(--color-text);
  transition: fill var(--transition-base);
}

.header__logo-text {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.025em;
  white-space: nowrap;
}

/* Navigation */
.header__nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav__link {
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition-fast);
  position: relative;
}

.nav__link:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.nav__link--active {
  color: var(--color-primary);
}

.nav__link--active::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-primary);
}

/* Header Actions */
.header__actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* Theme Toggle */
.theme-toggle {
  position: relative;
  width: 48px;
  height: 24px;
  background-color: var(--color-border);
  border-radius: var(--radius-full);
  border: none;
  padding: 0;
  cursor: pointer;
  transition: background-color var(--transition-base);
  overflow: hidden;
}

.theme-toggle__slider {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background-color: white;
  border-radius: var(--radius-full);
  transition: transform var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle__icon {
  width: 14px;
  height: 14px;
  color: var(--color-text);
  transition: opacity var(--transition-fast);
}

.theme-toggle__icon--trumpet {
  position: absolute;
  opacity: 1;
  color: var(--color-text);
}

.theme-toggle__icon--tuba {
  position: absolute;
  opacity: 0;
  color: var(--color-text);
}

[data-theme="dark"] .theme-toggle {
  background-color: var(--color-border);
}

[data-theme="dark"] .theme-toggle__slider {
  transform: translateX(24px);
}

[data-theme="dark"] .theme-toggle__icon--trumpet {
  opacity: 0;
}

[data-theme="dark"] .theme-toggle__icon--tuba {
  opacity: 1;
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.mobile-toggle__line {
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  transition: all var(--transition-base);
}

.mobile-toggle--active .mobile-toggle__line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

.mobile-toggle--active .mobile-toggle__line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Navigation */
.mobile-nav {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-background);
  transform: translateX(100%);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
  z-index: 999;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.mobile-nav--active {
  transform: translateX(0);
  opacity: 1;
  visibility: visible;
}

.mobile-nav__content {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  padding: var(--spacing-xl);
}

.mobile-nav__list {
  list-style: none;
  flex: 1;
}

.mobile-nav__item {
  margin-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--spacing-md);
}

.mobile-nav__item:last-child {
  border-bottom: none;
}

.mobile-nav__link {
  display: block;
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-base);
}

.mobile-nav__link:hover,
.mobile-nav__link--active {
  color: var(--color-primary);
}

.mobile-nav__footer {
  padding-top: var(--spacing-xl);
  margin-top: auto;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  align-items: center;
}

.mobile-nav__btn {
  width: 100%;
  text-align: center;
}

.theme-toggle--mobile {
  margin: 0 auto;
}

/* Responsive */
@media (max-width: 768px) {
  .nav__list {
    display: none;
  }
  
  .mobile-toggle {
    display: flex;
  }
  
  .header__actions {
    display: none;
  }
}

/* Header Scroll Effect */
.header--scrolled {
  box-shadow: var(--shadow-md);
}

/* Page Offset for Fixed Header */
main {
  padding-top: var(--header-height);
}