/* Reset */
  *, *::before, *::after {
    box-sizing: border-box;
  }
  body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #1a1a1a, #222222);
    color: #eeeeee;
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
  }
  a {
    text-decoration: none;
    color: inherit;
  }
  a:focus, button:focus, input:focus {
    outline: 3px solid #06b6d4;
    outline-offset: 3px;
  }

  /* Container */
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
  }

  /* Header */
  header {
    background: rgba(25,25,25,0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid #064550;
  }
  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 24px;
  }
  .logo {
    font-weight: 900;
    font-size: 2rem;
    background: linear-gradient(45deg, #06b6d4, #8b5cf6);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    user-select: none;
  }
  nav.desktop-nav {
    display: none;
    gap: 36px;
  }
  nav.desktop-nav a {
    font-weight: 600;
    font-size: 1rem;
    position: relative;
    padding: 8px 0;
  }
  nav.desktop-nav a:hover,
  nav.desktop-nav a.active {
    color: #8b5cf6;
  }
  nav.desktop-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    height: 2px;
    width: 0%;
    background: #8b5cf6;
    transition: width 0.3s ease;
  }
  nav.desktop-nav a:hover::after,
  nav.desktop-nav a.active::after {
    width: 100%;
  }

  /* Mobile Menu Button */
  .mobile-menu-btn {
    background: none;
    border: none;
    color: #06b6d4;
    font-size: 2.4rem;
    cursor: pointer;
    display: flex;
    align-items: center;
  }
  /* Mobile Nav Overlay */
  .mobile-nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 15, 15, 0.96);
    backdrop-filter: blur(10px);
    color: white;
    display: none;
    flex-direction: column;
    padding: 3rem 2rem;
    gap: 48px;
    z-index: 1500;
  }
  .mobile-nav-overlay.show {
    display: flex;
  }
  .mobile-nav-close {
    align-self: flex-end;
    font-size: 2rem;
    background: none;
    border: none;
    color: #06b6d4;
    cursor: pointer;
  }
  .mobile-nav-overlay a {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: 0.04em;
  }

  /* Search Container */
  .search-container {
    position: relative;
    max-width: 320px;
    flex-shrink: 0;
  }
  .search-container input[type="search"] {
    width: 100%;
    padding: 10px 44px 10px 16px;
    border-radius: 14px;
    border: 1.5px solid #064550;
    font-size: 1rem;
    background: #0a2739;
    color: #eee;
    transition: border-color 0.3s ease, background 0.3s ease;
  }
  .search-container input[type="search"]:focus {
    border-color: #8b5cf6;
    background: #123c63;
  }
  .search-container .material-icons.search-icon {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: #06b6d4;
    pointer-events: none;
    font-size: 24px;
  }
  .search-container button.search-submit {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #06b6d4;
    cursor: pointer;
    font-size: 24px;
    padding: 0;
  }
  .search-container button.search-submit:focus {
    outline: 2px solid #06b6d4;
    outline-offset: 1px;
  }

  /* Main Content */
  main {
    flex: 1;
    padding: 48px 0;
  }
  .articles-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 36px;
    max-width: 1200px;
    margin: 0 auto;
  }
  article.news-article {
    background: #121212cc;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 25px rgba(0,0,0,0.7);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
  }
  article.news-article:hover,
  article.news-article:focus-within {
    transform: translateY(-6px);
    box-shadow: 0 20px 50px rgba(139, 92, 246, 0.5);
  }
  article.news-article a.article-link {
    color: inherit;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    height: 100%;
  }
  .article-image {
    flex-shrink: 0;
    height: 180px;
    background-size: cover;
    background-position: center;
  }
  .article-content {
    padding: 20px 24px 28px;
    display: flex;
    flex-direction: column;
    gap: 14px;
  }
  .article-title {
    font-size: 1.45rem;
    font-weight: 900;
    line-height: 1.2;
    color: #ddd;
  }
  .article-summary {
    flex-grow: 1;
    font-weight: 400;
    font-size: 1rem;
    color: #bbb;
  }
  .article-meta {
    font-size: 0.85rem;
    color: #06b6d4;
    font-weight: 600;
  }
  .article-readmore-btn {
    margin-top: 12px;
    align-self: flex-start;
    font-weight: 700;
    color: #8b5cf6;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 1rem;
    transition: color 0.3s ease;
  }
  .article-readmore-btn:hover,
  .article-readmore-btn:focus {
    color: #06b6d4;
  }

  /* Footer */
  footer {
    background: rgba(15,15,15,0.95);
    color: #8bb4dc;
    padding: 32px 20px;
    border-top: 1px solid #064550;
  }
  .footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(180px,1fr));
    gap: 32px;
  }
  .footer-section h4 {
    font-weight: 700;
    color: #06b6d4;
    margin-bottom: 14px;
  }
  .footer-section a {
    display: block;
    color: #8bb4dc;
    margin: 6px 0;
    transition: color 0.3s ease;
  }
  .footer-section a:hover,
  .footer-section a:focus {
    color: #06b6d4;
  }

  /* Responsive */
  @media (min-width: 640px) {
    nav.desktop-nav {
      display: flex;
    }
    .mobile-menu-btn {
      display: none;
    }
    .articles-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  @media (min-width: 1024px) {
    .articles-grid {
      grid-template-columns: repeat(3, 1fr);
    }
  }
  @media (min-width: 1440px) {
    .container {
      max-width: 1440px;
    }
  }