.contenedor {
    background-color: var(--color-tarjeta);
    max-width: 550px;
    width: 90%;
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--color-borde);
    text-align: center;
}

.header h1 {
    font-size: 1.8rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.header p {
    color: var(--color-texto-secundario);
    font-size: 0.95rem;
    margin-bottom: 30px;
}

.zona-carga {
    border: 2px dashed var(--color-borde);
    padding: 50px 20px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.25s ease-in-out;
    background-color: rgba(255, 255, 255, 0.01);
}

.zona-carga:hover, .zona-carga.dragover {
    border-color: #8b5cf6; /* Color Violeta Documentos */
    background-color: rgba(139, 92, 246, 0.06);
}

.icono-carga {
    margin-bottom: 15px;
    transition: transform 0.2s ease;
}

.zona-carga:hover .icono-carga {
    transform: translateY(-4px);
}

.zona-carga p {
    font-size: 1rem;
    color: var(--color-texto-secundario);
    line-height: 1.5;
}

.enlace-buscar {
    color: #8b5cf6;
    text-decoration: underline;
    font-weight: 600;
}

.info-archivo {
    margin-top: 15px;
    font-size: 0.9rem;
    color: var(--color-exito);
    background-color: rgba(16, 185, 129, 0.1);
    padding: 8px 12px;
    border-radius: 6px;
    display: inline-block;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.opciones {
    margin-top: 30px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    text-align: left;
    animation: aparecer 0.4s ease forwards;
}

.selector-grupo {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.selector-grupo label {
    font-size: 0.85rem;
    color: var(--color-texto-secundario);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

select {
    background-color: var(--color-fondo);
    color: var(--color-texto);
    border: 1px solid var(--color-borde);
    padding: 14px;
    border-radius: 8px;
    font-size: 1rem;
    outline: none;
    cursor: pointer;
    width: 100%;
    transition: border-color 0.2s;
}

select:focus {
    border-color: #8b5cf6;
}

.btn-principal {
    background-color: #8b5cf6;
    color: white;
    border: none;
    padding: 15px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    width: 100%;
}

.btn-principal:hover {
    background-color: #7c3aed;
}

.btn-principal:active {
    transform: scale(0.98);
}

.btn-principal:disabled {
    background-color: var(--color-borde);
    color: var(--color-texto-secundario);
    cursor: not-allowed;
}

@keyframes aparecer {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}