#UpgradeSpawnTime, #UpgradeSpawnLevel {
    all: unset;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    text-align: center !important;
    width: auto; /* Hoặc set width cụ thể */
    min-width: 120px; /* Đảm bảo đủ không gian để text hiển thị đúng */
    height: auto; /* Hoặc set height cụ thể */
    background: linear-gradient(135deg, #ff9a9e, #fad0c4);
    border-radius: 8px;
    border: none;
    color: white;
    font-family: Arial, sans-serif;
    font-size: min((100dvw / 1080) * 25, 25px) !important;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease-in-out;
    box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.2);
    line-height: 1; /* Tránh bị lỗi khoảng cách dòng */
}
#UpgradeSpawnTime:hover, #UpgradeSpawnLevel:hover {
    background: linear-gradient(135deg, #fad0c4, #ff9a9e);
    transform: scale(1.05);
    box-shadow: 0px 6px 12px rgba(0, 0, 0, 0.3);
}
#UpgradeSpawnTime:disabled, #UpgradeSpawnLevel:disabled {
    background: #cccccc !important;
    color: #666666 !important;
    cursor: not-allowed !important;
    box-shadow: none !important;
    transform: none !important;
}
body {
    position: relative;
    margin: 0;
    padding: 0;
}

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: url('bg-5s.gif') no-repeat center center;
    background-size: cover;
    opacity: 0.8;
    z-index: -1; /* Để background nằm sau nội dung */
}
@media screen and (max-width: 768px) and (orientation: portrait) {
    body::before {
        background: url('bg-5s.gif') no-repeat center center;
        background-size: cover;
    }
}