/* Header Styles */
.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 1rem;
  max-width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.125rem;
  text-decoration: none;
}

.logo:hover {
  color: var(--color-text);
}

.logo-icon {
  width: 2.5rem;
  height: 2.5rem;
  color: var(--color-primary);
}

.logo-bg {
  fill: var(--color-primary);
}

.logo-text {
  display: none;
}

@media (min-width: 480px) {
  .logo-text {
    display: block;
  }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border: none;
  background-color: transparent;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.icon-btn:hover {
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
}

.icon-btn .icon {
  width: 1.25rem;
  height: 1.25rem;
}

/* Theme Toggle Icons */
.sun-icon {
  display: block;
}

.moon-icon {
  display: none;
}

@media (prefers-color-scheme: dark) {
  .sun-icon {
    display: none;
  }

  .moon-icon {
    display: block;
  }
}

[data-theme="light"] .sun-icon {
  display: block;
}

[data-theme="light"] .moon-icon {
  display: none;
}

[data-theme="dark"] .sun-icon {
  display: none;
}

[data-theme="dark"] .moon-icon {
  display: block;
}

/* Menu toggle visible on mobile */
.menu-toggle {
  display: flex;
}

@media (min-width: 768px) {
  .menu-toggle {
    display: none;
  }
}