body {
    margin: 0;
    font-family: Arial;
    display: flex;
}

.sidebar {
    width: 250px;
    height: 100vh;
    background: #2c3e50;
    color: white;
    padding: 20px;
    position: fixed;
}

.sidebar ul {
    list-style: none;
    padding: 0;
}

.sidebar ul li {
    margin: 20px 0;
}

.sidebar a {
    color: white;
    text-decoration: none;
}

.main {
    margin-left: 260px;
    padding: 40px;
    width: 100%;
    background: linear-gradient(to right, #e0f7fa, #ffffff);
}

section {
    margin-bottom: 60px;
}

button {
    padding: 10px 20px;
    background: #3498db;
    border: none;
    color: white;
    cursor: pointer;
}

.card {
    background: white;
    padding: 15px;
    margin: 10px 0;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}