:root {
      --color-principal: #1265a6;
      --color-oscuro: #1b1d39;
      --color-gris: #706f6f;
      --color-fondo: #f4f6f8;
      --color-blanco: #ffffff;
      --sombra-suave: 0 4px 12px rgba(0, 0, 0, 0.08);
    }

    body {
      font-family: 'Urbanist', sans-serif;
      margin: 0;
      padding: 0;
      background-color: var(--color-fondo);
      color: var(--color-gris);
      line-height: 1.6;
    }

    .seccion-formacion {
      max-width: 1200px;
      margin: 0 auto;
      padding: 6rem 2rem 4rem;
    }

    .titulo-formacion {
      text-align: center;
      font-size: 2.7rem;
      margin-bottom: 2rem;
      color: var(--color-principal);
    }

    .categorias {
      text-align: center;
      margin-bottom: 3rem;
    }

    .btn-categoria {
      background-color: var(--color-oscuro);
      color: white;
      border: none;
      border-radius: 50px;
      padding: 0.6rem 1.5rem;
      margin: 0 0.5rem;
      font-weight: 600;
      cursor: pointer;
      transition: background 0.3s ease;
    }

    .btn-categoria:hover {
      background-color: var(--color-principal);
    }

    .subtitulo {
      font-size: 2rem;
      color: var(--color-principal);
      margin-bottom: 1.5rem;
      border-left: 5px solid var(--color-principal);
      padding-left: 0.8rem;
    }

    .formacion-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 2rem;
      margin-bottom: 4rem;
    }

    .curso-card {
      background-color: var(--color-blanco);
      border-radius: 1rem;
      padding: 1.8rem;
      box-shadow: var(--sombra-suave);
      transition: transform 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      border-left: 4px solid transparent;
    }

    .curso-card:hover {
      transform: translateY(-5px);
      border-color: var(--color-principal);
    }

    .curso-card h4 {
      font-size: 1.25rem;
      color: var(--color-oscuro);
      margin-bottom: 0.5rem;
    }

    .curso-card p {
      font-size: 0.95rem;
      color: var(--color-gris);
      margin-bottom: 1rem;
    }

    .btn-contacto {
      display: inline-block;
      background: linear-gradient(135deg, #25D366, #128C7E);
      color: white;
      padding: 0.6rem 1.2rem;
      border-radius: 30px;
      text-decoration: none;
      font-weight: 600;
      font-size: 0.95rem;
      align-self: flex-start;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
      transition: all 0.3s ease;
    }

    .btn-contacto:hover {
      transform: scale(1.05);
      background: linear-gradient(135deg, #128C7E, #25D366);
    }

    @media (max-width: 768px) {
      .titulo-formacion {
        font-size: 2rem;
      }
      .subtitulo {
        font-size: 1.5rem;
      }
    }