.btn-kythuatvien {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--color-white);
    color: var(--color-black) !important;
    border-radius: 999px;
    font-size: 15px;
    text-decoration: none;
    position: relative;
    overflow: hidden;
    min-width: 200px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
    transition: all .3s ease;
    border: 2px solid transparent;
    white-space: nowrap;
}

.btn-kythuatvien:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.18);
}

.btn-kythuatvien .text {
    display: inline-block;
    position: relative;
    letter-spacing: .5px;
}

/* Responsive */
@media(max-width:768px) {
    .btn-kythuatvien {
        min-width: 220px;
        height: 52px;
        padding: 12px 22px;
        font-size: 14px;
    }

}

@media(max-width:480px) {
    .btn-kythuatvien {
        width: 100%;
        min-width: unset;
        font-size: 13px;
        height: 50px;
        padding: 10px 18px;
    }

}