.filtros {
    display: flex;
    gap: 10px;
    margin-bottom: 28px;
    flex-wrap: wrap;
  }

  .filtro-btn {
    padding: 8px 20px;
    border-radius: 20px;
    border: 2px solid #2c6b47;
    background: transparent;
    color: #2c6b47;
    font-weight: 700;
    font-size: 0.82rem;
    cursor: pointer;
    transition: all 0.2s;
  }

  .filtro-btn.activo,
  .filtro-btn:hover {
    background: #2c6b47;
    color: #fff;
  }

  .cursos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
  }

  .tarjeta-curso {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.07);
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
    display: flex;
    flex-direction: column;
  }

  .tarjeta-curso:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  }

  .tarjeta-curso.oculto { display: none; }

  .tarjeta-img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    display: block;
    background: #1a6b50;
    min-height: 160px;
  }

  .badge {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.05em;
  }

  .badge-activo { background: #22c55e; color: #fff; }
  .badge-finalizado { background: rgba(0,0,0,0.5); color: #fff; }

  .tarjeta-body {
    padding: 16px;
    flex: 1;
    display: flex;
    flex-direction: column;
  }

  .tarjeta-titulo {
    font-size: 0.92rem;
    font-weight: 700;
    color: #1a4a3a;
    margin-bottom: 8px;
    line-height: 1.35;
  }

  .tarjeta-fecha {
    font-size: 0.75rem;
    color: #666;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 5px;
  }

  .tarjeta-fecha i { color: #2c6b47; }

  .btn-modal {
    margin-top: auto;
    background: #2c6b47;
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 9px 16px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: background 0.2s;
  }

  .btn-modal:hover { background: #2c6b47; }
  .btn-modal.finalizado { background: #888; }
  .btn-modal.finalizado:hover { background: #666; }

  /* ===================== MODAL ===================== */
  .modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.65);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
    backdrop-filter: blur(3px);
  }

  .modal-overlay.open {
    display: flex;
    animation: fadeIn 0.2s ease;
  }

  @keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

  .modal-box {
    background: #132d26;
    border-radius: 16px;
    padding: 32px 28px 28px;
    max-width: 520px;
    width: 100%;
    color: #fff;
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.25s ease;
  }

  @keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
  }

  .modal-close {
    position: absolute;
    top: 14px;
    right: 16px;
    background: rgba(255,255,255,0.12);
    border: none;
    color: #fff;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
  }

  .modal-close:hover { background: rgba(255,255,255,0.25); }

  .modal-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 18px;
  }

  .modal-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 700;
    margin-bottom: 12px;
  }

  .modal-badge.activo { background: #22c55e; color: #fff; }
  .modal-badge.finalizado { background: #555; color: #fff; }

  .modal-titulo {
    font-size: 1.2rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 12px;
    line-height: 1.3;
  }

  .modal-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #7aaa95;
    font-weight: 700;
    margin-bottom: 4px;
    margin-top: 14px;
  }

  .modal-valor {
    font-size: 0.88rem;
    color: #d4e8e0;
    line-height: 1.5;
  }

  .modal-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    background: rgba(255,255,255,0.06);
    border-radius: 10px;
    padding: 16px;
    margin: 16px 0;
  }

  .modal-grid-item label {
    display: block;
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #7aaa95;
    font-weight: 700;
    margin-bottom: 4px;
  }

  .modal-grid-item span {
    font-size: 0.88rem;
    font-weight: 700;
    color: #4ade80;
  }

  .modal-grid-item.full { grid-column: 1 / -1; }

  .modal-cta {
    background: #22c55e;
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 12px 22px;
    font-size: 0.88rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 18px;
    transition: background 0.2s;
  }

  .modal-cta:hover { background: #16a34a; }

  .modal-cta.no-disponible {
    background: #555;
    cursor: default;
  }

  .modal-cta.no-disponible:hover { background: #555; }