.banner {
    display: flex;
    align-items: center;
    justify-content: flex-start;

    height: 10vh;
    width: 100%;

    background-color: #f8f8f8;
    padding: 0 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    box-sizing: border-box;

    position: sticky;
    top: 0;
    z-index: 1000;
    overflow: hidden;
}

.banner-logo {
    height: 8vh;
    width: auto;
    max-width: 600px;
    display: block;
}

@media (max-width: 768px) {
    .banner {
        height: 8vh;
        padding: 0 15px;
    }

    .banner-logo {
        height: 6vh; 
    }
}

@media (max-width: 480px) {
    .banner {
        height: 6vh;
        padding: 0 10px;
    }

    .banner-logo {
        height: 4vh;
    }
}

.logout-area, .login-area {
    position: absolute;
    top: 10px;
    right: 20px;
    color: #eee;
    background-color: #000;
    padding: 5px 10px;
    border-radius: 5px;
}

.logout-area a, .login-area a {
    color: #fff;
    font-weight: bold;
}