body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background-color: #f4f4f4  ;
}

#header-banner {
    position: relative;
    width: 100%;
    height: 150px;
    background: linear-gradient(90deg, #ff7f11, #ffb84d);
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.banner-logo {
    position: absolute;
    top: 40px; 
    left: 45px; 
    display: flex;
    justify-content: center;
    align-items: center;
}

.banner-logo img {
    max-width: 140px;
    max-height: 70px;
    object-fit: contain;
}

.banner-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.banner-content h1 {
    font-size: 28px;
    font-family: 'Montserrat', sans-serif;
    letter-spacing: 1px;
}

.banner-content p {
    font-size: 16px;
    color: #fff8e1;
}

.wrapper {
    display: flex;
    flex-direction: row;
    width: 100%;
    height: calc(100vh - 150px);
}

ul.navbar {
    list-style-type: none;
    margin: 0;
    padding: 0;
    background-color: rgba(0, 0, 0, 0.8); 
    width: 150px; 
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.2); 
    transition: width 0.3s ease;
}

ul.navbar li {
    margin: 0;
    padding: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

ul.navbar li.logo {
    padding: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-bottom: none; 
}

ul.navbar li.logo img {
    max-width: 100px; 
    max-height: 50px;
    object-fit: contain;
}

ul.navbar li a {
    display: block;
    color: #ffffff;
    text-align: center; 
    padding: 14px;
    font-size: 16px;
    text-decoration: none;
    transition: background-color 0.3s ease, color 0.3s ease;
}

ul.navbar li a:hover {
    background-color: #ff7f11;
    color: #fff;
    border-radius: 3px; 
}

ul.navbar li a.active {
    background-color: #ff7f11; 
    font-weight: bold;
}

main {
    flex: 1;
    padding: 20px;
    color: #333;
    overflow-y: auto;
    letter-spacing: 1px;
    line-height: 25px;
}

@media screen and (max-width: 900px) {
    .wrapper {
        flex-direction: column;
    }

    ul.navbar {
        width: 100%;
        height: auto;
        flex-direction: row; 
        justify-content: space-around;
    }

    ul.navbar li {
        border-bottom: none; 
    }

    ul.navbar li a {
        padding: 10px;
    }
}