body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #121212;
    color: #e0e0e0;
    margin: 0;
    padding: 0;
}
nav#navbar {
    background: #1f1f1f;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid #3498db;
}
#nav-links a {
    color: #3498db;
    margin-left: 2rem;
    text-decoration: none;
    font-weight: bold;
}
#nav-links a:hover {
    color: #1abc9c;
}
.product-card {
    background: #23272b;
    border: 1px solid #333;
    border-radius: 8px;
    padding: 1rem;
    margin: 1rem;
    width: 250px;
    display: inline-block;
    vertical-align: top;
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.1);
}
.product-card img {
    width: 100%;
    height: 150px;
    object-fit: contain;
}
button, input[type="submit"] {
    background: #3498db;
    color: #fff;
    border: none;
    padding: 0.5rem 1.2rem;
    border-radius: 4px;
    cursor: pointer;
    margin-top: 0.5rem;
}
button:hover {
    background: #1abc9c;
}
input, select {
    padding: 0.5rem;
    margin: 0.2rem 0;
    border-radius: 4px;
    border: 1px solid #444;
    background: #23272b;
    color: #e0e0e0;
}
#main-content {
    padding: 2rem;
}
.admin-panel {
    background: #222;
    padding: 2rem;
    border-radius: 10px;
}