#main {
    width: 100%;
    height: auto; 
    padding-bottom: 20px;
}

.footer {
    width: 100%;
    height: auto;
    background: whitesmoke;
    padding: 20px 0;
}

.search {
    background: grey;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 10px auto;
    padding: 10px;
}

.search #input {
    font-size: 13px;
    flex: 1;
}
nav ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    padding: 0;
    margin: 0;
    list-style: none;
}

nav ul li {
    margin: 5px 10px;
}

nav ul li a {
    text-decoration: none;
    color: #fff;
    font-size: 18px;
    padding: 10px;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: #ff6347;
}
.course-section {
    padding: 50px 0;
    background-color: rgb(235, 235, 235);
}
.course-section h3 {
    font-size: 1.75rem;
    color: #333;
    font-weight: bold;
    margin-bottom: 15px;
}
.course-section p {
    font-size: 1.125rem;
    color: #555;
    line-height: 1.6;
}
.course-section h4 {
    font-size: 1.25rem;
    color: #333;
    font-weight: bold;
    margin-top: 30px;
}
.promo-section {
    background-color: #f9f9f9;
    padding: 50px 0;
    text-align: center;
}
.promo-card {
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    padding: 30px;
    margin: 10px;
    transition: transform 0.3s ease;
}
.promo-card:hover {
    transform: translateY(-5px);
}
.promo-code {
    font-size: 1.5rem;
    font-weight: bold;
    color: #606060;
}
.promo-description {
    font-size: 1.125rem;
    color: #555;
    margin-top: 10px;
}
.promo-header {
    font-size: 2rem;
    font-weight: bold;
    color: #333;
    margin-bottom: 30px;
}

@media (max-width: 768px) {
    .header {
        flex-direction: column;
        text-align: center;
    }

    .leftcont, .contents, .footer {
        width: 100%;
        float: none;
    }

    .cbmain div {
        width: 100%;
    }

    nav ul {
        flex-direction: column;
        align-items: center;
    }

    .im {
        flex-direction: column;
    }
}