h1 {
    font-size: 2.6em;
    line-height: 44px;
    margin: 0 0 32px 0;
}

p {
    color: #777;
    line-height: 26px;
    margin: 0 0 20px;
}

.form-control {
    display: block;
    width: 100%;
    padding: .375rem .75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #212529;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid #ced4da;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    border-radius: .25rem;
    transition: border-color .15s ease-in-out,box-shadow .15s ease-in-out;
}

.form-control:not(.form-control-sm):not(.form-control-lg) {
    font-size: 13.6px;
    font-size: 0.85rem;
    line-height: 1.85;
}

button, input, optgroup, select, textarea {
    margin: 0;
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
}

.mb-3 {
    margin-bottom: 1rem!important;
}

.btn-enviar {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: #fff;
    border: none;
    padding: 12px 28px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-enviar:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
}

.btn-enviar:active {
    transform: translateY(0);
}

.btn-enviar:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}