body {
    background: white;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Card (contenedor principal) */
.card {
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

/* Encabezado del formulario */
.card h3 {
    background: #2c3e50;
    color: white;
    padding: 15px;
    margin: -25px -25px 25px -25px; /* Para que ocupe todo el ancho */
    border-radius: 10px 10px 0 0;
    text-align: center;
}

/* Cuerpo del formulario */
.card .form-label {
    font-weight: 600;
    color: #2c3e50;
}

.form-control {
    padding: 12px 15px;
    border-radius: 5px;
    margin-bottom: 15px;
    border: 1px solid #ddd;
    transition: all 0.3s;
}

.form-control:focus {
    border-color: #2c3e50;
    box-shadow: 0 0 0 0.25rem rgba(78, 115, 223, 0.25);
}

/* Botón de enviar */
.btn-primary {
    background-color: #2c3e50;
    border: none;
    padding: 12px;
    font-weight: 600;
    transition: all 0.3s;
    color: white;
    border-radius: 5px;
}

.btn-primary:hover {
    background-color: #1a252f;
}

/* Botón de enlace (volver a login) */
.btn-link {
    color: #2c3e50 !important;
    text-decoration: none !important;
    font-weight: 600;
}

.btn-link:hover,
.btn-link:focus,
.btn-link:active {
    color: #2c3e50 !important;
    text-decoration: underline !important; /* opcional */
}