/* ===== Reset básico ===== */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }

    body {
      background: linear-gradient(to right, #4facfe, #00f2fe);
      color: #333;
      line-height: 1.6;
    }

    header {
      background-color: rgba(0,0,0,0.7);
      color: white;
      text-align: center;
      padding: 2rem 1rem;
      box-shadow: 0 4px 6px rgba(0,0,0,0.2);
    }

    header h1 {
      font-size: 2.5rem;
      margin-bottom: 0.5rem;
    }

    header p {
      font-size: 1.2rem;
      opacity: 0.9;
    }

    main {
      max-width: 900px;
      margin: 2rem auto;
      background: rgba(255,255,255,0.95);
      padding: 2rem;
      border-radius: 12px;
      box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    }

    h2 {
      color: #4facfe;
      margin-bottom: 1rem;
    }

    p {
      margin-bottom: 1rem;
      font-size: 1.1rem;
    }

    /* ===== Tarxetas de enlaces ===== */
    .links {
      display: flex;
      gap: 1rem;
      justify-content: center;
      flex-wrap: wrap;
      margin-top: 2rem;
    }

    .card {
      background: #4facfe;
      color: white;
      padding: 1.5rem 2rem;
      border-radius: 10px;
      text-align: center;
      text-decoration: none;
      font-weight: bold;
      transition: transform 0.3s, box-shadow 0.3s;
    }

    .card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 16px rgba(0,0,0,0.2);
    }

    footer {
      text-align: center;
      padding: 1rem;
      margin-top: 2rem;
      font-size: 0.9rem;
      color: white;
    }

    @media(max-width: 600px){
      header h1 {
        font-size: 2rem;
      }
      .card {
        width: 100%;
      }
    }