* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #f5f5f5;
    color: #333;
    padding: 16px;
}
header h1 { font-size: 22px; margin-bottom: 16px; }
.card {
    background: white;
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.card h3 { font-size: 16px; margin-bottom: 8px; }
.card p { font-size: 14px; color: #666; margin-bottom: 4px; }
.btn {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 8px;
    border: none;
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
}
.btn-primary { background: #2481cc; color: white; }
.btn-success { background: #28a745; color: white; }
.btn-danger { background: #dc3545; color: white; }
.btn-sm { padding: 4px 8px; font-size: 12px; }