/* Header component styles for i18n Layout Template - BEM naming */

.template-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  transition: all var(--transition-normal);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

/* Logo section */
.logo-section {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.logo {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  margin: 0;
  line-height: 1;
  text-decoration: none;
  transition: color var(--transition-normal);
}

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

.logo__icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-lg);
  background: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-inverse);
  font-weight: var(--font-bold);
  font-size: var(--text-lg);
}

/* Header navigation */
.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Language controls */
.language-controls {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.language-select {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  box-shadow: var(--glass-shadow);
  color: var(--text-primary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all var(--transition-normal);
  min-width: 140px;
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  background-size: 16px;
  padding-right: var(--space-10);
  position: relative;
  font-family: var(--font-family-sans);
}

.language-select:hover {
  border-color: var(--primary-color);
  box-shadow: var(--glass-shadow-hover);
}

.language-select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: var(--glass-shadow-focus);
}

.language-select option {
  background: var(--glass-bg);
  color: var(--text-primary);
  padding: var(--space-2) var(--space-3);
  border: none;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.language-select option:hover {
  background: var(--primary-color);
  color: var(--text-inverse);
}

.language-select option:checked {
  background: var(--primary-color);
  color: var(--text-inverse);
  font-weight: var(--font-semibold);
}

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: var(--glass-shadow);
}

.theme-toggle:hover {
  border-color: var(--primary-color);
  box-shadow: var(--glass-shadow-hover);
}

.theme-toggle:active {
  transform: scale(0.95);
}

.theme-toggle:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: var(--glass-shadow-focus);
}

.theme-toggle__icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-normal);
}

.theme-toggle:hover .theme-toggle__icon {
  transform: rotate(15deg);
}

/* Mobile menu */
.mobile-menu-button {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: var(--glass-shadow);
}

.mobile-menu-button:hover {
  border-color: var(--primary-color);
  box-shadow: var(--glass-shadow-hover);
}

.mobile-menu-button:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: var(--glass-shadow-focus);
}

.mobile-menu-button__icon {
  width: 20px;
  height: 20px;
  position: relative;
}

.mobile-menu-button__icon span {
  display: block;
  width: 100%;
  height: 2px;
  background: currentColor;
  margin: 4px 0;
  transition: all var(--transition-normal);
  border-radius: 1px;
}

/* Navigation menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-menu__item {
  margin: 0;
}

.nav-menu__link {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: var(--font-medium);
  transition: color var(--transition-normal);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
}

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

.nav-menu__link:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.nav-menu__link--active {
  color: var(--primary-color);
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
}

/* Responsive design */
@media (max-width: 768px) {
  .header-container {
    padding: var(--space-3);
    gap: var(--space-3);
  }

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

  .nav-controls {
    gap: var(--space-2);
  }

  .language-select {
    min-width: 120px;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
  }

  .theme-toggle {
    width: 36px;
    height: 36px;
  }

  .nav-menu {
    display: none;
  }

  .mobile-menu-button {
    display: flex;
  }
}

@media (max-width: 480px) {
  .header-container {
    padding: var(--space-2);
    gap: var(--space-2);
  }

  .logo {
    font-size: var(--text-lg);
  }

  .language-select {
    min-width: 100px;
    padding: var(--space-2);
    font-size: var(--text-xs);
  }

  .theme-toggle {
    width: 32px;
    height: 32px;
  }
}

@media (max-width: 375px) {
  .header-container {
    flex-direction: column;
    gap: var(--space-3);
    padding: var(--space-3);
  }

  .nav-controls {
    width: 100%;
    justify-content: center;
    gap: var(--space-3);
  }
}

/* Accessibility */
@media (prefers-contrast: high) {
  .template-header {
    border-bottom: 2px solid var(--text-primary);
  }

  .language-select,
  .theme-toggle,
  .mobile-menu-button {
    border: 2px solid var(--text-primary);
  }
}

@media (prefers-reduced-motion: reduce) {
  .theme-toggle:hover .theme-toggle__icon {
    transform: none;
  }

  .language-select:hover {
    transform: none;
  }
}
/* Compact custom language menu, kept local so the app remains dependency-free. */
.language-menu { position: relative; }
.language-select--native { position: absolute !important; width: 1px !important; height: 1px !important; overflow: hidden !important; opacity: 0; pointer-events: none; }
.language-menu__trigger {
  min-width: 142px;
  min-height: 44px;
  padding: 0.35rem 0.7rem 0.35rem 0.35rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-2);
  border: 1px solid transparent;
  border-radius: calc(var(--radius-xl) - 0.2rem);
  background: transparent;
  color: var(--text-primary);
  font: inherit;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  text-align: left;
  cursor: pointer;
}
.language-menu__trigger:hover,
.language-menu__trigger[aria-expanded='true'] { border-color: color-mix(in srgb, var(--primary-color) 28%, transparent); background: color-mix(in srgb, var(--primary-color) 10%, var(--bg-secondary)); }
.language-menu__flag { width: 1.75rem; height: 1.75rem; display: grid; place-items: center; border: 1px solid color-mix(in srgb, var(--primary-color) 22%, var(--border-primary)); border-radius: var(--radius-md); background: color-mix(in srgb, var(--primary-color) 10%, var(--bg-secondary)); color: var(--primary-color); font-size: 0.65rem; font-weight: var(--font-extrabold); letter-spacing: 0.04em; }
.language-menu__label { overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.language-menu__chevron { color: var(--text-secondary); transform: rotate(180deg); transition: transform 240ms cubic-bezier(0.34, 1.56, 0.64, 1), color var(--transition-fast); }
.language-menu__trigger[aria-expanded='true'] .language-menu__chevron { color: var(--primary-color); transform: rotate(0deg); }
.language-menu__panel { position: absolute; top: calc(100% + 0.5rem); left: 50%; z-index: 1100; width: min(210px, calc(100vw - 1rem)); padding: 0.35rem; display: grid; gap: var(--space-1); border: 1px solid var(--border-primary); border-radius: var(--radius-xl); background: color-mix(in srgb, var(--bg-primary) 97%, transparent); box-shadow: var(--shadow-xl); backdrop-filter: blur(18px); transform: translateX(-50%); }
.language-menu__panel[hidden] { display: none; }
.language-menu__option { width: 100%; min-height: 44px; padding: 0.4rem; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: var(--space-2); border: 1px solid transparent; border-radius: var(--radius-lg); background: transparent; color: var(--text-primary); font: inherit; text-align: left; cursor: pointer; }
.language-menu__option:hover,
.language-menu__option:focus-visible,
.language-menu__option[aria-checked='true'] { background: color-mix(in srgb, var(--primary-color) 12%, var(--bg-secondary)); }
.language-menu__check { color: var(--primary-color); opacity: 0; }
.language-menu__option[aria-checked='true'] .language-menu__check { opacity: 1; }
@media (max-width: 520px) {
  .language-menu__trigger { min-width: 44px; width: 44px; padding: 0.35rem; grid-template-columns: 1fr auto; }
  .language-menu__panel { width: min(150px, calc(100vw - 1rem)); }
  .language-menu__label { display: none; }
  .language-menu__flag { border: 0; background: transparent; }
}
@media (prefers-reduced-motion: reduce) { .language-menu__chevron { transition: none; } }

/* Mobile header contract shared visually with i18n-layout-template. */
@media (max-width: 520px) {
  .header-container {
    flex-direction: row;
    padding: var(--space-2);
    gap: var(--space-2);
  }

  .logo-section {
    flex: 1 1 55%;
    min-width: 0;
  }

  .logo {
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
  }

  .header-nav { flex: 0 0 auto; }
  .nav-controls { width: auto; justify-content: flex-end; gap: 0.2rem; }
  .theme-toggle { width: 42px; height: 44px; min-width: 42px; }
}