body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f4f4f4;
}

h1, h2 { color: #333; }

form, table {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

input, select, button {
    display: block;
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 4px;
}

button { background: #007bff; color: white; cursor: pointer; }

table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px; text-align: left; border-bottom: 1px solid #ddd; }
th { background: #f8f9fa; }

ul { list-style: none; padding: 0; }
li { 
    background: white; 
    margin: 10px 0; 
    padding: 15px; 
    border-left: 4px solid #007bff; 
    border-radius: 4px; 
}

a { color: #007bff; text-decoration: none; }
a:hover { text-decoration: underline; }

.error { color: red; }
.success { color: green; }