:root {
    color-scheme: dark;
    --bg-color: #050505;
    --text-color: #f5f5f7;
    --text-muted: #b3b3b8;
    --header-bg: rgba(10, 10, 10, 0.88);
    --card-bg: #ffffff;
    --accent-color: #4da3ff;
    --accent-hover: #7bbcff;
    --ad-bg: #161618;
    --border-radius-lg: 18px;
    --border-radius-sm: 12px;
    --shadow-sm: 0 4px 10px rgba(0,0,0,0.28);
    --shadow-md: 0 14px 30px rgba(0,0,0,0.36);
    --shadow-hover: 0 24px 44px rgba(0,0,0,0.5);
    --gradient-text: linear-gradient(90deg, #ffffff, #8dc3ff);
    --compare-card-bg: #121212;
    --compare-card-bg-hover: #1b1b1b;
    --compare-card-border: rgba(255, 255, 255, 0.08);
    --compare-card-shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
    --compare-text-primary: #f5f5f7;
    --compare-text-secondary: #c9c9ce;
    --compare-text-muted: #9898a3;
    --compare-accent: #4da3ff;
    --badge-good: #2e7d32;
    --badge-good-plus: #1b5e20;
    --badge-regular: #f9a825;
    --badge-poor: #c62828;
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    background-image: radial-gradient(circle at top, rgba(77, 163, 255, 0.12), transparent 32%);
    color: var(--text-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    padding-top: 60px; /* Space for fixed header */
  }
  
  /* Typography */
  h1, h2, h3, h4 {
    font-weight: 600;
    letter-spacing: -0.02em;
  }
  
  h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-align: center;
  }
  
  h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
  }
  
  .gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
  }
  
  /* Header & Nav */
  header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background: var(--header-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    transition: all 0.3s ease;
  }
  
  .logo a {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-color);
    text-decoration: none;
    letter-spacing: -0.01em;
  }
  
  nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
  }
  
  nav a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 0.9rem;
    font-weight: 500;
    opacity: 0.8;
    transition: opacity 0.2s;
  }
  
  nav a:hover, nav a.active {
    opacity: 1;
    color: var(--accent-color);
  }
  
  .mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
  }
  
  /* Layout */
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
  }
  
  @media (max-width: 992px) {
    .container {
      grid-template-columns: 1fr;
    }
  }
  
  main {
    width: 100%;
  }
  
  .full-width {
    grid-column: 1 / -1;
  }
  
  /* Ad Spaces */
  .ad-space {
    background: var(--ad-bg);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--border-radius-sm);
    border: 1px dashed rgba(255,255,255,0.16);
    margin: 2rem 0;
  }
  
  .ad-banner { height: 90px; width: 100%; }
  .ad-sidebar { height: 600px; width: 100%; position: sticky; top: 80px; }
  .ad-inline { height: 250px; width: 100%; margin: 3rem 0; }
  
  /* Product Grid */
  .product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
  }
  
  .product-card {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
    color: #1d1d1f;
  }
  
  .product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
  }

  .home-highlight-grid .product-card {
    background:
      linear-gradient(180deg, rgba(28, 30, 36, 0.96) 0%, rgba(14, 15, 19, 0.98) 100%);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-color);
    box-shadow: 0 18px 38px rgba(0, 0, 0, 0.42);
  }

  .home-highlight-grid .product-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top, rgba(77, 163, 255, 0.12), transparent 52%);
    pointer-events: none;
  }

  .home-highlight-grid .product-card p,
  .home-highlight-grid .product-card h3 {
    position: relative;
    z-index: 1;
  }

  .home-highlight-grid .product-card h3 {
    color: var(--text-color);
  }

  .home-highlight-grid .product-card p {
    color: #c3c7d1 !important;
  }

  .home-highlight-grid .product-card:hover {
    border-color: rgba(77, 163, 255, 0.22);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.55);
  }
  
  .product-image {
    width: 100%;
    height: 220px;
    object-fit: contain;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 10px 10px rgba(0,0,0,0.1));
    transition: transform 0.4s ease;
  }
  
  .product-card:hover .product-image {
    transform: scale(1.05);
  }
  
  .product-name {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
  }
  
  .product-state {
    font-size: 0.85rem;
    color: #5f6670;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
    background: rgba(29, 29, 31, 0.08);
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
  }
  
  .product-specs {
    width: 100%;
    text-align: left;
    margin: 1rem 0;
    padding-top: 1rem;
    border-top: 1px solid rgba(29,29,31,0.12);
  }
  
  .product-specs li {
    font-size: 0.85rem;
    color: #5f6670;
    list-style: none;
    margin-bottom: 0.4rem;
    display: flex;
    justify-content: space-between;
  }
  
  .product-specs li strong {
    color: #1d1d1f;
    font-weight: 500;
  }
  
  /* Buttons */
  .btn-amazon {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    text-decoration: none;
    padding: 0.8rem 1.5rem;
    border-radius: 30px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.2s;
    width: 100%;
    margin-top: auto;
    box-shadow: 0 4px 10px rgba(0, 102, 204, 0.3);
  }
  
  .btn-amazon:hover {
    background-color: var(--accent-hover);
    transform: scale(1.02);
    box-shadow: 0 6px 15px rgba(0, 102, 204, 0.4);
  }
  
  /* Comparison Table */
  .table-responsive {
    overflow-x: auto;
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    padding: 1rem;
    color: #1d1d1f;
  }
  
  .compare-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 800px;
  }
  
  .compare-table th, .compare-table td {
    padding: 1.2rem;
    text-align: center;
    border-bottom: 1px solid rgba(29,29,31,0.12);
  }
  
  .compare-table th {
    font-weight: 600;
    color: #1d1d1f;
    background: rgba(29,29,31,0.05);
  }
  
  .compare-table img {
    height: 120px;
    object-fit: contain;
    margin-bottom: 0.5rem;
  }

  .compare-section {
    margin: 2.5rem 0;
  }

  .compare-shell {
    background: transparent;
    box-shadow: none;
    padding: 0;
    overflow-x: auto;
  }

  .compare-shell .compare-table {
    border-collapse: separate;
    border-spacing: 0 1rem;
    min-width: 940px;
  }

  .compare-shell .compare-table th,
  .compare-shell .compare-table td {
    background: var(--compare-card-bg);
    color: var(--compare-text-secondary);
    border: 1px solid var(--compare-card-border);
    border-bottom: 1px solid var(--compare-card-border);
    box-shadow: var(--compare-card-shadow);
    transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
  }

  .compare-shell .compare-table thead th {
    color: var(--compare-text-primary);
    background: linear-gradient(180deg, #1a1a1a 0%, #121212 100%);
    vertical-align: top;
  }

  .compare-shell .compare-table tbody tr:hover td {
    background: var(--compare-card-bg-hover);
    border-color: rgba(255, 255, 255, 0.12);
  }

  .compare-shell .compare-table th:first-child,
  .compare-shell .compare-table td:first-child {
    border-radius: 20px 0 0 20px;
  }

  .compare-shell .compare-table th:last-child,
  .compare-shell .compare-table td:last-child {
    border-radius: 0 20px 20px 0;
  }

  .compare-feature-head {
    min-width: 170px;
    text-align: left;
    font-size: 0.95rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }

  .compare-model-head {
    min-width: 180px;
  }

  .compare-model-name {
    display: block;
    margin-top: 0.9rem;
    color: var(--compare-text-primary);
    font-size: 1rem;
    font-weight: 600;
  }

  .compare-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.38rem 0.78rem;
    margin-bottom: 0.9rem;
    border-radius: 999px;
    color: #f8f8f8;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border: 1px solid rgba(255, 255, 255, 0.08);
  }

  .badge-excellent {
    background: var(--badge-good-plus);
  }

  .badge-good-plus {
    background: var(--badge-good);
  }

  .badge-good {
    background: #33691e;
  }

  .badge-regular {
    background: var(--badge-regular);
    color: #fffdf5;
  }

  .badge-poor {
    background: var(--badge-poor);
  }

  .compare-shell .compare-table td {
    color: var(--compare-text-secondary);
  }

  .compare-shell .compare-table td strong {
    color: var(--compare-text-primary);
  }

  .compare-shell .compare-table tbody td:first-child {
    color: var(--compare-text-primary);
    font-weight: 600;
    text-align: left;
    background: linear-gradient(180deg, #181818 0%, #121212 100%);
  }

  .compare-shell .compare-table img {
    height: 118px;
    filter: drop-shadow(0 16px 20px rgba(0, 0, 0, 0.35));
  }
  
  /* Blog styles */
  .blog-post {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
    color: #1d1d1f;
  }
  
  .blog-post p {
    margin-bottom: 1rem;
    color: #5f6670;
  }
  
  .blog-post h2, .blog-post h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
  }
  
  /* Footer */
  footer {
    text-align: center;
    padding: 3rem 1rem;
    margin-top: 4rem;
    background: #0d0d0f;
    color: var(--text-muted);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }
  
  /* Responsive */
  @media (max-width: 768px) {
    nav ul {
      position: fixed;
      top: 60px;
      left: -100%;
      width: 100%;
      height: calc(100vh - 60px);
      background: rgba(10, 10, 10, 0.96);
      backdrop-filter: blur(20px);
      flex-direction: column;
      align-items: center;
      justify-content: center;
      transition: left 0.3s ease;
    }
    
    nav ul.show {
      left: 0;
    }
    
    nav ul li {
      font-size: 1.5rem;
    }
    
    .mobile-menu-btn {
      display: block;
    }
    
    h1 { font-size: 2rem; }
  }
  
  /* Hero Section */
  .hero {
    text-align: center;
    padding: 4rem 1rem;
    background: #0f1013;
    border-radius: var(--border-radius-lg);
    margin-bottom: 3rem;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
  }
  
  .hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 2rem auto;
  }