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

.sidebar {
    width: 250px;
    background: #1f2b52;
    color: white;
    position: fixed;
    top: 0;
    bottom: 0;
    padding: 30px 20px;
}

.sidebar h2 {
    margin-bottom: 20px;
    font-size: 1.6rem;
}

.sidebar nav a {
    display: block;
    padding: 10px 0;
    color: #dbe3ff;
    text-decoration: none;
    font-size: 1.1rem;
}

.sidebar nav a:hover {
    color: white;
}

.header {
    margin-left: 250px;
    padding: 70px 40px;
    background: linear-gradient(120deg, #566bff, #7b8dfd);
    color: white;
}

.header h1 {
    font-size: 2.5rem;
}

.content {
    margin-left: 250px;
    padding: 40px;
}

.popular-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 20px;
}

.pop-card {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.08);
}

.cat {
    background: #fff;
    padding: 20px;
    border-left: 5px solid #4b79ff;
    margin-bottom: 20px;
    border-radius: 6px;
}

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

.why-list li {
    background: #eef1ff;
    margin-bottom: 10px;
    padding: 15px;
    border-radius: 6px;
}

.faq-item {
    margin-bottom: 20px;
    padding: 15px;
    background: #ffffff;
    border-radius: 6px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.05);
}

.footer {
    text-align: center;
    padding: 40px;
    margin-top: 40px;
}