body {
    margin: 0;
    padding: 0;
    height: 100vh;
    overflow: hidden;
    position: relative;
    font-family: 'Segoe UI', sans-serif;
}

.background-overlay {
    background-image: url('../images/background.jpg'); /* hoặc thay bằng URL */
    background-size: cover;
    background-position: center;
    position: fixed;
    width: 100%;
    height: 100%;
    z-index: -2;
    filter: blur(1px); /* Làm mờ ảnh nền */
}

.background-overlay::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5); /* Lớp phủ đen mờ */
    z-index: -1;
}

/* Container căn giữa nội dung */
.login-container {
    position: relative;
    z-index: 1;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Hộp đăng nhập nền trắng mờ */
.login-box {
    background-color: rgba(255, 255, 255, 0.4);
    padding: 10px;
    border-radius: 10px;
    width: 100%;
    max-width: 400px;
}

.login-card-flat {
    background-color: transparent !important;
    border: none !important;
    box-shadow: none !important;
    border-radius: 0 !important;
    color: white;
}

.form-control {
    background-color: transparent !important;
}

.input-group-text {
    background-color: transparent !important;
}

.lost-pass {
    color: rgb(7, 43, 247);
    text-decoration: none;
    text-shadow: initial;
}

.form-floating label::after {
    background-color: transparent !important;
    color: white;
}