html, body {
      height: 100%;
      margin: 0;
      padding: 0;
    }
    
    body {
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }
    
    main {
      flex: 1 0 auto;
    }
      .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }    .support-category-page {
      padding: 2rem 0;
      padding-top: 8rem;
    }.category-header {
      text-align: center;
      margin-bottom: 3rem;
      padding: 3rem 2rem;
      background: rgba(255, 255, 255, 0.15);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 24px;
      color: #1a1a1a;
      box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.12),
        0 2px 16px rgba(0, 0, 0, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.4),
        inset 0 -1px 0 rgba(0, 0, 0, 0.05);
      position: relative;
      overflow: hidden;
    }
    
    .category-header::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.1) 0%,
        rgba(255, 255, 255, 0.05) 25%,
        rgba(0, 0, 0, 0.02) 50%,
        rgba(255, 255, 255, 0.1) 100%);
      pointer-events: none;
      z-index: 1;
    }
    
    .category-header > * {
      position: relative;
      z-index: 2;
    }    .category-header h1 {
      font-family: 'Cormorant', serif;
      font-size: 3rem;
      margin-bottom: 0.75rem;
      font-weight: 700;
      background: linear-gradient(135deg, #1a1a1a 0%, #404040 50%, #1a1a1a 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
      letter-spacing: -0.02em;
    }

    .category-header p {
      font-size: 1.25rem;
      color: #4a4a4a;
      margin: 0 auto;
      max-width: 600px;
      font-weight: 400;
      line-height: 1.6;
      text-shadow: 0 1px 2px rgba(255, 255, 255, 0.8);
    }    .back-to-support {
      display: inline-flex;
      align-items: center;
      gap: 0.75rem;
      color: #4a4a4a;
      text-decoration: none;
      font-weight: 600;
      margin-bottom: 2rem;
      padding: 0.875rem 1.25rem;
      background: rgba(255, 255, 255, 0.9);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid rgba(198, 165, 124, 0.15);
      border-radius: 12px;
      transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
      box-shadow: 
        0 2px 12px rgba(0, 0, 0, 0.06),
        0 1px 4px rgba(0, 0, 0, 0.04);
      font-family: 'Montserrat', sans-serif;
      font-size: 0.9375rem;
      width: fit-content;
      position: relative;
      overflow: hidden;
      z-index: 1;
    }

    .back-to-support::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: linear-gradient(135deg, 
        rgba(198, 165, 124, 0.08) 0%, 
        rgba(255, 255, 255, 0.12) 100%);
      opacity: 0;
      transition: opacity 0.3s ease;
      pointer-events: none;
    }

    .back-to-support i {
      font-size: 1rem;
      transition: all 0.3s ease;
      color: #C6A57C;
    }

    .back-to-support:hover {
      color: #2a2a2a;
      transform: translateX(-8px) translateY(-2px);
      box-shadow: 
        0 8px 24px rgba(0, 0, 0, 0.12),
        0 2px 8px rgba(0, 0, 0, 0.08);
      border-color: rgba(198, 165, 124, 0.25);
      background: rgba(255, 255, 255, 0.95);
    }

    .back-to-support:hover::before {
      opacity: 1;
    }

    .back-to-support:hover i {
      color: #8B7355;
      transform: scale(1.1) translateX(-2px);
    }

    .back-to-support:active {
      transform: translateX(-6px) translateY(-1px) scale(0.98);
    }/* Ultra-Premium Panel System */
    .support-panels-system {
      display: flex;
      gap: 1.25rem;
      margin: 2rem 0;
      padding: 0;
      animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
      align-items: flex-start;
    }    .support-panel {
      background: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(24px);
      -webkit-backdrop-filter: blur(24px);
      border: 1px solid rgba(198, 165, 124, 0.12);
      border-radius: 18px;
      box-shadow: 
        0 10px 40px rgba(0, 0, 0, 0.06),
        0 2px 8px rgba(0, 0, 0, 0.04),
        inset 0 1px 0 rgba(255, 255, 255, 0.9),
        inset 0 -1px 0 rgba(198, 165, 124, 0.05);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
      position: relative;
      will-change: transform;
      /* Allow natural content height */
      height: fit-content;
    }

    .support-panel::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(198, 165, 124, 0.3), transparent);
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .support-panel:hover::before {
      opacity: 1;
    }

    .support-panel:hover {
      transform: translateY(-3px) scale(1.01);
      box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.1),
        0 4px 16px rgba(0, 0, 0, 0.06),
        inset 0 1px 0 rgba(255, 255, 255, 0.95),
        inset 0 -1px 0 rgba(198, 165, 124, 0.08);
      border-color: rgba(198, 165, 124, 0.2);
    }    .panel-sidebar {
      flex: 0 0 360px;
      min-width: 360px;
    }

    .panel-content {
      flex: 1;
      min-width: 0;
    }    .panel-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 1rem 1.125rem;
      border-bottom: 1px solid rgba(198, 165, 124, 0.08);
      background: linear-gradient(135deg, rgba(198, 165, 124, 0.025) 0%, rgba(255, 255, 255, 0.85) 100%);
      backdrop-filter: blur(12px);
      position: relative;
    }

    .panel-title-section {
      display: flex;
      align-items: center;
      gap: 0.875rem;
    }

    .panel-icon {
      width: 28px;
      height: 28px;
      background: linear-gradient(135deg, var(--support-gold) 0%, #d4b78e 100%);
      border-radius: 7px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 12px;
      box-shadow: 
        0 3px 12px rgba(198, 165, 124, 0.35),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
      transition: all 0.3s ease;
    }

    .support-panel:hover .panel-icon {
      transform: scale(1.05);
      box-shadow: 
        0 4px 16px rgba(198, 165, 124, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.4);
    }

    .panel-title-section h3 {
      font-family: 'CASTELAR', serif;
      font-size: 1.075rem;
      font-weight: 600;
      color: var(--support-gray-900);
      margin: 0;
      letter-spacing: -0.015em;
      text-shadow: 0 1px 2px rgba(255, 255, 255, 0.8);
    }

    .panel-controls {
      display: flex;
      gap: 0.375rem;
      opacity: 0.5;
      transition: all 0.3s ease;
    }

    .support-panel:hover .panel-controls {
      opacity: 0.85;
    }

    .panel-control-btn {
      width: 22px;
      height: 22px;
      border: none;
      background: rgba(255, 255, 255, 0.85);
      border: 1px solid rgba(198, 165, 124, 0.1);
      border-radius: 5px;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      color: var(--support-gray-600);
      font-size: 9px;
      backdrop-filter: blur(8px);
    }

    .panel-control-btn:hover {
      background: rgba(198, 165, 124, 0.08);
      color: var(--support-gold);
      transform: scale(1.15);
      border-color: rgba(198, 165, 124, 0.2);
    }    .panel-content {
      flex: 1;
      padding: 1.125rem;
      overflow-y: auto;
      scrollbar-width: thin;
      scrollbar-color: rgba(198, 165, 124, 0.25) transparent;
      /* Allow content to determine height naturally */
      min-height: 0;
      height: auto;
      text-align: left;
    }

    .panel-content::-webkit-scrollbar {
      width: 5px;
    }

    .panel-content::-webkit-scrollbar-track {
      background: transparent;
    }

    .panel-content::-webkit-scrollbar-thumb {
      background: rgba(198, 165, 124, 0.25);
      border-radius: 3px;
      transition: background 0.3s ease;
    }

    .panel-content::-webkit-scrollbar-thumb:hover {
      background: rgba(198, 165, 124, 0.4);
    }

    /* Search Section */
    .search-section {
      margin-bottom: 1.75rem;
    }

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

    .search-wrapper-panel i {
      position: absolute;
      left: 1rem;
      color: var(--support-gray-400);
      font-size: 0.875rem;
      z-index: 1;
      transition: color 0.3s ease;
    }

    .panel-search {
      width: 100%;
      padding: 0.875rem 1rem 0.875rem 2.5rem;
      border: 1px solid rgba(198, 165, 124, 0.15);
      border-radius: 10px;
      background: rgba(255, 255, 255, 0.9);
      font-size: 0.875rem;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      font-family: 'Montserrat', sans-serif;
      backdrop-filter: blur(8px);
    }

    .panel-search:focus {
      outline: none;
      border-color: var(--support-gold);
      background: white;
      box-shadow: 
        0 0 0 3px rgba(198, 165, 124, 0.08),
        0 2px 8px rgba(198, 165, 124, 0.1);
      transform: translateY(-1px);
    }

    .panel-search:focus + .search-wrapper-panel i {
      color: var(--support-gold);
    }    /* Articles List */
    .articles-list {
      display: flex;
      flex-direction: column;
      gap: 0.625rem;
      text-align: left;
      align-items: stretch;
    }    .article-item {
      padding: 1rem;
      border-radius: 10px;
      background: rgba(255, 255, 255, 0.7);
      border: 1px solid rgba(198, 165, 124, 0.08);
      cursor: pointer;
      transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
      position: relative;
      overflow: hidden;
      backdrop-filter: blur(6px);
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
      text-align: left;
      align-items: flex-start;
    }

    .article-item::before {
      content: '';
      position: absolute;
      left: 0;
      top: 0;
      width: 3px;
      height: 100%;
      background: linear-gradient(135deg, var(--support-gold), #d4b78e);
      transform: scaleY(0);
      transition: transform 0.3s ease;
      transform-origin: bottom;
    }

    .article-item:hover::before {
      transform: scaleY(1);
      transform-origin: top;
    }

    .article-item:hover {
      background: rgba(198, 165, 124, 0.04);
      border-color: rgba(198, 165, 124, 0.15);
      transform: translateX(3px);
      box-shadow: 0 4px 16px rgba(198, 165, 124, 0.1);
    }

    .article-item.active {
      background: linear-gradient(135deg, rgba(198, 165, 124, 0.08) 0%, rgba(255, 255, 255, 0.95) 100%);
      border-color: var(--support-gold);
      box-shadow: 
        0 4px 20px rgba(198, 165, 124, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
      transform: translateX(5px);
    }.article-item h4 {
      font-size: 0.9375rem;
      font-weight: 600;
      color: var(--support-gray-900);
      margin: 0 0 0.375rem 0;
      line-height: 1.3;
      font-family: 'Montserrat', sans-serif;
      transition: color 0.3s ease;
      text-align: left;
      width: 100%;
    }.article-item:hover h4 {
      color: var(--support-gray-800);
    }

    .article-item.active h4 {
      color: var(--support-gray-900);
    }    .article-item p {
      font-size: 0.8125rem;
      color: var(--support-gray-600);
      margin: 0;
      line-height: 1.4;
      transition: color 0.3s ease;
      text-align: left;
      width: 100%;
    }

    .article-item:hover p {
      color: var(--support-gray-700);
    }

    .article-item.active p {
      color: var(--support-gray-700);
    }.article-item .read-time {
      font-size: 0.75rem;
      color: var(--support-gold);
      display: inline-flex;
      align-items: center;
      gap: 0.25rem;
      font-weight: 500;
      background: rgba(198, 165, 124, 0.1);
      padding: 0.25rem 0.5rem;
      border-radius: 12px;
      border: 1px solid rgba(198, 165, 124, 0.2);
      max-width: fit-content;
      transition: all 0.3s ease;
    }    .article-item:hover .read-time {
      background: var(--support-gold);
      color: white;
      border-color: var(--support-gold);
      transform: scale(1.05);
    }

    .article-item.active .read-time {
      background: var(--support-gold);
      color: white;
      border-color: var(--support-gold);
      box-shadow: 0 2px 8px rgba(198, 165, 124, 0.3);
      transform: scale(1.05);
    }

    /* Empty State */    .empty-state {
      text-align: center;
      padding: 2.5rem 1.5rem;
      color: var(--support-gray-600);
    }

    .empty-state-icon {
      width: 56px;
      height: 56px;
      background: linear-gradient(135deg, rgba(198, 165, 124, 0.1) 0%, rgba(198, 165, 124, 0.04) 100%);
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 1.25rem;
      color: var(--support-gold);
      font-size: 1.375rem;
      box-shadow: 0 4px 16px rgba(198, 165, 124, 0.1);
      border: 1px solid rgba(198, 165, 124, 0.1);
    }

    .empty-state h4 {
      font-family: 'CASTELAR', serif;
      font-size: 1.1875rem;
      color: var(--support-gray-800);
      margin: 0 0 0.625rem 0;
      font-weight: 600;
    }

    .empty-state p {
      font-size: 0.9375rem;
      line-height: 1.5;
      margin: 0;
      opacity: 0.8;
    }    /* Article Content Display */
    .article-display {
      height: auto;
      display: flex;
      flex-direction: column;
    }    .article-content-view {
      animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1);
      height: auto;
      min-height: 0;
      text-align: left;
    }    .article-content-view h3 {
      font-family: 'CASTELAR', serif;
      font-size: 1.4rem;
      color: var(--support-gray-900);
      margin: 0 0 1rem 0;
      line-height: 1.3;
      font-weight: 600;
      text-align: left;
    }    .article-content-view h4 {
      font-size: 1.0625rem;
      color: var(--support-gray-800);
      margin: 1.5rem 0 0.75rem 0;
      font-weight: 600;
      font-family: 'Montserrat', sans-serif;
      text-align: left;
    }    .article-content-view p {
      font-size: 0.875rem;
      line-height: 1.6;
      color: var(--support-gray-700);
      margin: 0 0 1rem 0;
      text-align: left;
    }.article-content-view ul,
    .article-content-view ol {
      padding-left: 1.25rem;
      margin: 1rem 0;
    }

    .article-content-view li {
      font-size: 0.875rem;
      line-height: 1.6;
      color: var(--support-gray-700);
      margin-bottom: 0.5rem;
    }

    .article-tip {
      background: rgba(254, 207, 71, 0.08);
      border: 1px solid rgba(254, 207, 71, 0.2);
      border-radius: 10px;
      padding: 1rem;
      margin: 1.25rem 0;
      display: flex;
      align-items: flex-start;
      gap: 0.875rem;
    }

    .article-tip i {
      color: #d97706;
      font-size: 1.125rem;
      margin-top: 0.125rem;
    }

    .article-tip p {
      margin: 0;
      color: #92400e;
      font-size: 0.875rem;
      line-height: 1.5;
    }

    @keyframes fadeInUp {
      from {
        opacity: 0;
        transform: translateY(15px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }    /* Responsive Design */
    @media (max-width: 1024px) {
      .support-panels-system {
        flex-direction: column;
        gap: 1rem;
        min-height: auto;
      }
        .panel-sidebar {
        flex: none;
        min-width: 0;
        max-height: 35vh;
        order: 1;
      }
      
      .panel-content {
        order: 2;
        /* Removed min-height to prevent excessive white space */
      }
      
      .category-header {
        padding: 2.5rem 1.5rem;
        margin-bottom: 2rem;
      }
      
      .category-header h1 {
        font-size: 2.5rem;
      }
      
      .category-header p {
        font-size: 1.1rem;
      }
    }

    /* Mobile Article Selector - Native iOS/Android Style */
    .mobile-article-selector {
      display: none;
      margin-bottom: 1rem;
      order: 0;
    }

    .mobile-selector-wrapper {
      position: relative;
      background: rgba(255, 255, 255, 0.98);
      border: 1px solid rgba(198, 165, 124, 0.15);
      border-radius: 12px;
      box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
      overflow: hidden;
    }

    .mobile-selector-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 1rem 1.25rem;
      background: linear-gradient(135deg, rgba(198, 165, 124, 0.025) 0%, rgba(255, 255, 255, 0.85) 100%);
      border-bottom: 1px solid rgba(198, 165, 124, 0.08);
      cursor: pointer;
      transition: all 0.3s ease;
    }

    .mobile-selector-header:active {
      background: rgba(198, 165, 124, 0.05);
    }

    .mobile-selector-title {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      flex: 1;
    }

    .mobile-selector-icon {
      width: 24px;
      height: 24px;
      background: linear-gradient(135deg, var(--support-gold) 0%, #d4b78e 100%);
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 11px;
    }

    .mobile-selector-text {
      font-family: 'Montserrat', sans-serif;
      font-size: 0.9375rem;
      font-weight: 600;
      color: var(--support-gray-800);
    }

    .mobile-selector-chevron {
      color: var(--support-gray-500);
      font-size: 0.875rem;
      transition: transform 0.3s ease;
    }

    .mobile-selector-wrapper.open .mobile-selector-chevron {
      transform: rotate(180deg);
    }

    .mobile-selector-dropdown {
      max-height: 0;
      overflow: hidden;
      transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
      background: white;
    }

    .mobile-selector-wrapper.open .mobile-selector-dropdown {
      max-height: 60vh;
      overflow-y: auto;
      -webkit-overflow-scrolling: touch;
    }

    .mobile-selector-list {
      padding: 0.5rem 0;
    }

    .mobile-selector-item {
      display: flex;
      align-items: center;
      padding: 1rem 1.25rem;
      cursor: pointer;
      transition: all 0.2s ease;
      border-bottom: 1px solid rgba(198, 165, 124, 0.04);
      position: relative;
    }

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

    .mobile-selector-item:active {
      background: rgba(198, 165, 124, 0.08);
      transform: scale(0.98);
    }

    .mobile-selector-item.selected {
      background: linear-gradient(135deg, rgba(198, 165, 124, 0.1) 0%, rgba(255, 255, 255, 0.95) 100%);
      border-left: 3px solid var(--support-gold);
    }

    .mobile-selector-item.selected::after {
      content: '✓';
      position: absolute;
      right: 1.25rem;
      color: var(--support-gold);
      font-weight: bold;
      font-size: 1rem;
    }

    .mobile-selector-item-content {
      flex: 1;
    }

    .mobile-selector-item h4 {
      font-size: 0.9375rem;
      font-weight: 600;
      color: var(--support-gray-900);
      margin: 0 0 0.25rem 0;
      line-height: 1.3;
    }

    .mobile-selector-item p {
      font-size: 0.8125rem;
      color: var(--support-gray-600);
      margin: 0;
      line-height: 1.4;
    }    @media (max-width: 768px) {
      .support-panels-system {
        margin: 1rem -0.5rem;
        gap: 0.75rem;
      }
      
      .support-panel {
        border-radius: 14px;
        margin: 0 0.5rem;
      }
      
      .panel-header {
        padding: 1rem 1.125rem;
      }
      
      .panel-content {
        padding: 1.125rem;
      }
        
      /* Hide desktop sidebar on mobile */
      .panel-sidebar {
        display: none;
      }
      
      /* Show mobile selector on mobile */
      .mobile-article-selector {
        display: block;
        margin: 0 0.5rem 0.75rem 0.5rem;
      }
      
      .panel-content {
        order: 1;
      }
      
      .panel-icon {
        width: 26px;
        height: 26px;
      }
      
      .panel-title-section h3 {
        font-size: 1rem;
      }
      
      .category-header {
        padding: 2rem 1rem;
        margin-bottom: 1.5rem;
        border-radius: 18px;
      }
      
      .category-header h1 {
        font-size: 2rem;
      }
      
      .category-header p {
        font-size: 1rem;
      }
    }