header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    max-width: 100%;
    z-index: 1030;
}

/* 固定 Footer */
footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    max-width: 100%;
    z-index: 1030;
    background-color: #f8f9fa;
    border-top: 1px solid #e7e7e7;
}

/* 調整主內容區域 */
main {
    margin-top: 30px;
    /* 避免被 header 蓋住 */
    width: 100%;
    max-width: 100%;
}

/* Global font setting */
body {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 1.75rem !important;
}

/* ================= SweetAlert2 ================= */
.my-swal-popup {
    width: 500px !important;
    font-size: 1.2rem !important;
}

.my-swal-title {
    font-size: 3rem !important;
    font-weight: bold;
}

.my-swal-text {
    font-size: 2rem !important;
}