body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #f5f7fa;
}

header {
    background: #1e293b;
    color: white;
    padding: 16px;
}

header h1 {
    margin: 0;
    font-size: 24px;
}

.container {
    max-width: 1000px;
    margin: auto;
    padding: 20px;
}

.card {
    background: white;
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 12px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}

.card h3 {
    margin-top: 0;
}

footer {
    text-align: center;
    padding: 20px;
    color: #777;
}