:root {
      --bg: #0f172a;
      --card: #111827;
      --accent: #ef4444;
      --text: #e5e7eb;
      --muted: #94a3b8;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: Arial, Helvetica, sans-serif;
    }

    body {
      background: var(--bg);
      color: var(--text);
      line-height: 1.6;
    }

    header {
      padding: 60px 20px;
      text-align: center;
      background: linear-gradient(135deg, #111827, #0f172a);
      border-bottom: 2px solid #1f2937;
    }

    header h1 {
      font-size: 3rem;
      letter-spacing: 2px;
    }

    header p {
      color: var(--muted);
      margin-top: 10px;
    }

    .accent {
      color: var(--accent);
    }

    nav {
      display: flex;
      justify-content: center;
      gap: 20px;
      padding: 15px;
      background: #0b1220;
      /*position: sticky;*/
      /*top: 0;*/
    }

    nav a {
      color: var(--text);
      text-decoration: none;
      padding: 8px 12px;
      border-radius: 6px;
    }

    nav a:hover {
      background: var(--accent);
    }

    .container {
      max-width: 1100px;
      margin: auto;
      padding: 40px 20px;
    }

    .grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 20px;
    }

    .card {
      background: var(--card);
      padding: 20px;
      border-radius: 12px;
      border: 1px solid #1f2937;
    }

    .card h3 {
      margin-bottom: 10px;
      color: var(--accent);
    }

    footer {
      text-align: center;
      padding: 30px;
      color: var(--muted);
      border-top: 1px solid #1f2937;
      margin-top: 40px;
    }

    .hero {
      text-align: center;
      margin-bottom: 40px;
    }

    .btn {
      display: inline-block;
      margin-top: 15px;
      padding: 10px 18px;
      background: var(--accent);
      color: white;
      border-radius: 8px;
      text-decoration: none;
    }

    .btn:hover {
      opacity: 0.85;
    }

    ul {
      margin-top: 10px;
      padding-left: 18px;
      color: var(--muted);
    }