/* Header Styles - Facebook-inspired Light */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-lg);
  z-index: 100;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header-left,
.header-center,
.header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.header-left {
  flex: 1;
  gap: var(--spacing-lg);
}

.header-center {
  flex: 0 0 auto;
}

.header-right {
  flex: 0 0 auto;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 4px;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-image {
  height: 40px;
  width: auto;
  display: block;
}

.youtube-logo {
  width: 90px;
  height: 20px;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--accent);
}

.logo-region {
  font-size: 10px;
  color: var(--text-tertiary);
  margin-left: 2px;
}

/* Icon Buttons - Facebook style circular */
.icon-button {
  width: 40px;
  height: 40px;
  border: none;
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color 0.2s;
}

.icon-button:hover {
  background-color: var(--bg-hover);
}

.icon-button:active {
  transform: scale(0.95);
}

.icon-button svg {
  width: 20px;
  height: 20px;
}

.menu-btn {
  background: none;
}

/* Search - Facebook-style rounded (left side) */
.search-form {
  display: none;
  flex: 1;
  max-width: 240px;
}

.search-input-wrapper {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
}

.search-input {
  flex: 1;
  height: 40px;
  padding: 0 var(--spacing-lg);
  padding-left: 40px;
  padding-right: 36px;
  background-color: var(--bg-tertiary);
  border: none;
  border-radius: 20px;
  color: var(--text-primary);
  font-size: 15px;
  outline: none;
  transition: background-color 0.2s, box-shadow 0.2s;
}

.search-input:focus {
  background-color: var(--bg-secondary);
  box-shadow: 0 0 0 2px var(--accent);
}

.search-input::placeholder {
  color: var(--text-tertiary);
}

/* Search icon inside input */
.search-form .search-button {
  position: absolute;
  left: 0;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  border-radius: 20px 0 0 20px;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.search-form .search-button:hover {
  color: var(--accent);
}

.search-clear-btn {
  position: absolute;
  right: 8px;
  width: 24px;
  height: 24px;
  border: none;
  background: none;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s, color 0.2s;
  padding: 0;
}

.search-clear-btn:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.search-clear-btn svg {
  width: 18px;
  height: 18px;
}

.voice-search {
  display: none;
}

/* Language Selector */
.language-selector {
  position: relative;
}

.language-button img {
  border-radius: 50%;
  display: block;
}

.language-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: var(--spacing-sm) 0;
  min-width: 150px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
  z-index: 1000;
}

.language-selector:hover .language-dropdown,
.language-button:focus + .language-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.language-option {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: 10px var(--spacing-lg);
  color: var(--text-primary);
  font-size: 14px;
  cursor: pointer;
  transition: background-color 0.2s;
  text-decoration: none;
}

.language-option:hover {
  background-color: var(--bg-hover);
}

.language-option img {
  border-radius: 50%;
  display: block;
}

.language-option span:last-child {
  flex: 1;
}

/* Mobile Search Button (Hidden on Desktop) */
.mobile-search-btn {
  display: none;
}

/* Mobile Search Overlay */
.mobile-search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-secondary);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.mobile-search-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-search-header {
  height: var(--header-height);
  background-color: var(--bg-secondary);
  display: flex;
  align-items: center;
  padding: 0 var(--spacing-sm);
  gap: var(--spacing-sm);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.mobile-search-close {
  flex-shrink: 0;
}

.mobile-search-form {
  flex: 1;
  display: flex;
  position: relative;
}

.mobile-search-form .search-input-wrapper {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
}

.mobile-search-input {
  flex: 1;
  height: 40px;
  padding: 0 var(--spacing-lg);
  padding-left: 16px;
  padding-right: 40px;
  background-color: var(--bg-tertiary);
  border: none;
  border-radius: 20px;
  color: var(--text-primary);
  font-size: 16px;
  outline: none;
  transition: box-shadow 0.2s;
}

.mobile-search-input:focus {
  box-shadow: 0 0 0 2px var(--accent);
}

.mobile-search-input::placeholder {
  color: var(--text-tertiary);
}

.mobile-search-submit {
  position: absolute;
  right: 0;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  border-radius: 0 20px 20px 0;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.mobile-search-submit:hover {
  color: var(--accent);
}

/* Responsive */
@media (min-width: 769px) {
  .search-form {
    display: flex !important;
  }

  .header-center {
    display: flex;
  }

  .mobile-search-btn {
    display: none !important;
  }
}

@media (min-width: 1100px) {
  .search-form {
    max-width: 320px;
  }
}

@media (max-width: 768px) {
  /* Hide desktop search, show mobile search button */
  .search-form {
    display: none !important;
  }

  .mobile-search-btn {
    display: flex;
  }

  .logo-text {
    display: none;
  }

  .header-center {
    display: none;
  }
}

@media (max-width: 480px) {
  .header {
    padding: 0 var(--spacing-sm);
  }

  .header-left,
  .header-right {
    gap: var(--spacing-sm);
  }

  .mobile-search-input {
    /* IMPORTANT: Keep font-size >= 16px to prevent mobile browser auto-zoom */
    font-size: 16px;
    padding: 0 var(--spacing-md);
  }
}