/* Header component styles */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg-elevated);
  border-bottom: var(--border-thin);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding-mobile);
  padding-block: var(--space-2);
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--text-primary);
  flex-shrink: 0;
}

.brand:hover {
  text-decoration: none;
}

.brand-logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  display: block;
}

.brand-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--text-primary);
  white-space: nowrap;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border-thin);
  border-radius: var(--radius-small);
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.nav-toggle:hover {
  border-color: var(--accent-cyan);
  background-color: rgba(82, 214, 208, 0.1);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

.nav-toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--bg-overlay);
  border-bottom: var(--border-thin);
  box-shadow: var(--shadow-soft);
  padding: var(--space-3);
  max-height: calc(100vh - 64px);
  overflow-y: auto;
  z-index: 999;
}

.site-nav.is-open {
  display: block;
}

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

.nav-list li {
  margin: 0;
  padding: 0;
}

.nav-link {
  display: block;
  padding: var(--space-2) var(--space-3);
  color: var(--text-primary);
  text-decoration: none;
  font-size: var(--text-body);
  font-weight: 500;
  border-radius: var(--radius-small);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav-link:hover {
  background-color: rgba(82, 214, 208, 0.1);
  color: var(--accent-cyan);
  text-decoration: none;
}

.nav-link[aria-current="page"] {
  color: var(--accent-copper);
  box-shadow: inset 0 -2px 0 var(--accent-copper);
}

.nav-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.nav-actions .btn {
  width: 100%;
}

@media (min-width: 640px) {
  .header-inner {
    padding-inline: var(--container-padding-tablet);
  }
}

@media (min-width: 1024px) {
  .header-inner {
    padding-inline: var(--container-padding-desktop);
    min-height: 72px;
  }

  .brand-logo {
    width: 40px;
    height: 40px;
  }

  .nav-toggle {
    display: none;
  }

  .site-nav {
    display: flex;
    position: static;
    flex-direction: row;
    align-items: center;
    gap: var(--space-4);
    background-color: transparent;
    border-bottom: none;
    box-shadow: none;
    padding: 0;
    max-height: none;
    overflow: visible;
    z-index: auto;
  }

  .nav-list {
    flex-direction: row;
    gap: var(--space-3);
  }

  .nav-link {
    padding: var(--space-2) var(--space-1);
    font-size: var(--text-small);
    white-space: nowrap;
  }

  .nav-actions {
    flex-direction: row;
    gap: var(--space-2);
    margin-top: 0;
  }

  .nav-actions .btn {
    width: auto;
  }
}

@media (min-width: 1280px) {
  .header-inner {
    gap: var(--space-5);
  }

  .nav-list {
    gap: var(--space-4);
  }
}