html {
    height: 100%;
    font-size: 14px;
    position: relative;
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}
html, body {
    height: 100%;
    margin: 0;
    padding: 0;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1 0 auto; /* ยืดเต็มพื้นที่ */
}

.footercus {
    background-color: #f8f9fa;
    padding: 1rem 0;
    text-align: center;
    flex-shrink: 0; /* กันไม่ให้ footer หด */
    border-top: 1px solid #e5e5e5;
}

.btn:focus,
.btn:active:focus,
.btn-link.nav-link:focus,
.form-control:focus,
.form-check-input:focus {
    box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

.form-floating > .form-control-plaintext::placeholder,
.form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder,
.form-floating > .form-control:focus::placeholder {
    text-align: start;
}