.card-form {
    background: rgba(40, 40, 40, 0.9);
    /* Fondo semitransparente */
    border-radius: 1rem;
    padding: 2rem;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.card-form:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
}

.card-form h2 {
    font-weight: 700;
    color: #fff;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.7);
}

.card-form input,
.card-form textarea,
.card-form select {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 0.5rem;
    color: #fff;
    padding: 0.75rem 1rem;
    margin-bottom: 1rem;
    transition: background 0.3s, border-color 0.3s;
}

.card-form input:focus,
.card-form textarea:focus,
.card-form select:focus {
    background: rgba(255, 255, 255, 0.1);
    border-color: #ff4d4d;
    /* color de acento */
    outline: none;
}

.card-form button {
    background: linear-gradient(45deg, #ff4d4d, #ff1a1a);
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 0.75rem;
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

.card-form button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 77, 77, 0.6);
}