* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    :root {
      --primary: #2563eb;
      --primary-dark: #1d4ed8;
      --secondary: #64748b;
      --accent: #f59e0b;
      --success: #10b981;
      --danger: #ef4444;
      --background: #0f172a;
      --surface: #1e293b;
      --surface-light: #334155;
      --text: #f8fafc;
      --text-secondary: #cbd5e1;
      --border: #475569;
      --shadow: rgba(0, 0, 0, 0.3);
    }

    body {
      font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
      background: linear-gradient(135deg, var(--background) 0%, #1a202c 100%);
      color: var(--text);
      min-height: 100vh;
      line-height: 1.6;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1rem;
    }

    header {
      background: rgba(30, 41, 59, 0.8);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border);
      position: sticky;
      top: 0;
      z-index: 100;
    }

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

    .logo {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--primary);
    }

    .controls {
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    .refresh-btn {
      background: linear-gradient(45deg, var(--primary), var(--primary-dark));
      color: white;
      border: none;
      padding: 0.5rem 1rem;
      border-radius: 8px;
      cursor: pointer;
      font-weight: 500;
      transition: all 0.3s ease;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .refresh-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
    }

    .refresh-btn:disabled {
      opacity: 0.6;
      cursor: not-allowed;
      transform: none;
    }

    .spinner {
      width: 16px;
      height: 16px;
      border: 2px solid transparent;
      border-top: 2px solid currentColor;
      border-radius: 50%;
      animation: spin 1s linear infinite;
    }

    @keyframes spin {
      to { transform: rotate(360deg); }
    }

    .filter-tabs {
      display: flex;
      gap: 0.5rem;
      margin-bottom: 2rem;
      overflow-x: auto;
      padding: 0.5rem 0;
    }

    .filter-tab {
      background: var(--surface);
      border: 1px solid var(--border);
      color: var(--text-secondary);
      padding: 0.5rem 1rem;
      border-radius: 20px;
      cursor: pointer;
      transition: all 0.3s ease;
      white-space: nowrap;
      font-size: 0.9rem;
    }

    .filter-tab:hover {
      background: var(--surface-light);
      color: var(--text);
    }

    .filter-tab.active {
      background: var(--primary);
      color: white;
      border-color: var(--primary);
    }

    .stats {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 1rem;
      margin: 2rem 0;
    }

    .stat-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 1.5rem;
      text-align: center;
    }

    .stat-number {
      font-size: 2rem;
      font-weight: 700;
      color: var(--primary);
    }

    .stat-label {
      color: var(--text-secondary);
      font-size: 0.9rem;
    }

    .news-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
      gap: 1.5rem;
      margin: 2rem 0;
    }

    .news-item {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 16px;
      overflow: hidden;
      transition: all 0.3s ease;
      cursor: pointer;
      position: relative;
    }

    .news-item:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 40px var(--shadow);
      border-color: var(--primary);
    }

    .news-item.fade-in {
      animation: fadeIn 0.5s ease-out;
    }

    @keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(20px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .news-content {
      padding: 1.5rem;
    }

    .news-title {
      font-size: 1.1rem;
      font-weight: 600;
      margin-bottom: 0.5rem;
      line-height: 1.4;
      color: var(--text);
      text-decoration: none;
      display: block;
    }

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

    .news-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 1rem;
      font-size: 0.85rem;
      color: var(--text-secondary);
    }

    .source-tag {
      background: var(--primary);
      color: white;
      padding: 0.25rem 0.75rem;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 500;
    }

    .source-tag.bbc {
      background: #bb1919;
    }

    .source-tag.nyt {
      background: #000;
    }

    .news-description {
      color: var(--text-secondary);
      line-height: 1.5;
      display: -webkit-box;
      -webkit-line-clamp: 3;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .loading-state {
      text-align: center;
      padding: 4rem;
      color: var(--text-secondary);
    }

    .loading-state .spinner {
      width: 40px;
      height: 40px;
      border-width: 3px;
      margin: 0 auto 1rem;
    }

    .error-state {
      text-align: center;
      padding: 4rem;
      color: var(--danger);
    }

    .empty-state {
      text-align: center;
      padding: 4rem;
      color: var(--text-secondary);
    }

    @media (max-width: 768px) {
      .container {
        padding: 0 0.5rem;
      }

      .header-content {
        flex-direction: column;
        gap: 1rem;
      }

      .news-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
      }

      .stats {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    .scroll-to-top {
      position: fixed;
      bottom: 2rem;
      right: 2rem;
      background: var(--primary);
      color: white;
      border: none;
      width: 50px;
      height: 50px;
      border-radius: 50%;
      cursor: pointer;
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s ease;
      z-index: 1000;
    }

    .scroll-to-top.visible {
      opacity: 1;
      visibility: visible;
    }

    .scroll-to-top:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
    }