body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 1em 0;
    position: relative;
}

header .logo {
    position: absolute;
    top: 10px;
    left: 20px;
}

header .logo img {
    max-height: 50px;
}

header h1 {
    margin: 0;
    font-size: 2em;
}

header p {
    margin: 0.5em 0 0;
    font-size: 1em;
}

nav ul {
    list-style-type: none;
    padding: 0;
    background-color: #444;
    text-align: center;
}

nav ul li {
    display: inline;
    margin: 0;
}

nav ul li a {
    color: #fff;
    padding: 14px 20px;
    text-decoration: none;
    display: inline-block;
}

nav ul li a:hover {
    background-color: #575757;
}

main {
    padding: 2em;
}

h2 {
    text-align: center;
}

.service, .product, .solar-panel {
    background: white;
    margin: 20px 0;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.service img, .product img, .solar-panel img {
    max-width: 100%;
    height: auto;
    border-radius: 5px;
}

form {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    background: white;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

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

input, textarea {
    width: 100%;
    padding: 10px;
    margin-bottom: 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

button {
    padding: 10px 20px;
    background-color: #333;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #575757;
}

.cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    border-bottom: 1px solid #ccc;
}

.cart-item button {
    margin-left: 10px;
}

.cart-total {
    text-align: right;
    font-weight: bold;
    margin-top: 20px;
}

footer {
    text-align: center;
    padding: 1em 0;
    background-color: #333;
    color: #fff;
    position: fixed;
    width: 100%;
    bottom: 0;
}

.cart-button-container {
    text-align: center;
    margin-top: 20px;
}

.cart-button-container button {
    margin: 0 10px;
    padding: 15px 30px;
    font-size: 16px;
    background-color: #007BFF;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.cart-button-container button:hover {
    background-color: #0056b3;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgb(0,0,0);
    background-color: rgba(0,0,0,0.4);
    padding-top: 60px;
}

.modal-content {
    background-color: #fefefe;
    margin: 5% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
    max-width: 600px;
    position: relative;
}

.close-btn {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}

.close-btn:hover,
.close-btn:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}