body {
    font-family: Arial, sans-serif;
    background-color: #1a1a1a;
    color: #fff;
    margin: 0;
    padding: 0;
}
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: black;
    color: #fff;
    padding: 10px 20px;
}

header .logo {
    font-size: 1.5em;
}

header nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

header nav ul li {
    margin-left: 20px;
}

header nav ul li a {
    color: #fff;
    text-decoration: none;
    font-size: 1em;
}

.container {
    display: flex;
    max-width: 1200px;
    margin: auto;
    padding: 20px;
}

.left-column {
    width: 60%;
}

.left-column img {
    width: 100%;
}

.right-column {
    width: 40%;
    padding-left: 20px;
}

.product-description h1 {
    font-size: 24px;
    margin-bottom: 10px;
}

.product-price {
    font-size: 22px;
    color: #ffcc00;
    margin-bottom: 20px;
}

.size-select,
.color-select {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 5px;
}

select {
    width: 100%;
    padding: 10px;
    background-color: #333;
    border: 1px solid #444;
    color: #fff;
}

.add-to-cart {
    background-color: #ffcc00;
    border: none;
    padding: 15px 20px;
    cursor: pointer;
    font-size: 16px;
    color: #1a1a1a;
}
#admin-login-section,
        #admin-section {
            margin-top: 20px;
        }

        #admin-login-form input,
        #admin-login-form button,
        #admin-section select,
        #admin-section button {
            display: block;
            margin: 10px 0;
        }

        #admin-login-message,
        #admin-update-message {
            margin-top: 10px;
            font-weight: bold;
        }