body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f5f5f5;
    color: #222;
}

.sidebar {
    width: 240px;
    height: 100vh;
    background: #ffffff;
    border-right: 1px solid #ddd;
    position: fixed;
    padding: 20px;
}

.logo {
    font-size: 22px;
    font-weight: bold;
    margin-bottom: 30px;
}

.menu {
    list-style: none;
    padding: 0;
}

.menu li {
    padding: 12px;
    margin-bottom: 8px;
    cursor: pointer;
    border-radius: 6px;
}

.menu li:hover {
    background: #eaeaea;
}

.menu li.active {
    background: #007bff;
    color: white;
}

.content {
    margin-left: 260px;
    padding: 30px;
}

.page {
    display: none;
}

.page.visible {
    display: block;
}

textarea {
    width: 100%;
    height: 150px;
    padding: 12px;
    font-size: 16px;
}

button {
    padding: 10px 20px;
    background: #007bff;
    border: none;
    color: white;
    border-radius: 6px;
    cursor: pointer;
    margin-top: 10px;
}

button:hover {
    background: #005fcc;
}

.cards {
    display: flex;
    gap: 20px;
}

.card {
    background: white;
    padding: 20px;
    border-radius: 8px;
    width: 250px;
    border: 1px solid #ddd;
}