body {
    font-family: Arial, sans-serif;
    background: #f4f4f4;
}
.container {
    max-width: 90%;
    margin: 20px auto;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
nav {
    margin-bottom: 20px;
    font-size: 1.1em;
}
.flashes li {
    padding: 8px;
    margin: 5px 0;
    border-radius: 4px;
}
.flashes .success { background: #d4edda; color: #155724; }
.flashes .error { background: #f8d7da; color: #721c24; }
input, select, button {
    padding: 8px;
    margin: 5px 0;
}
button {
    background: #007bff;
    color: white;
    border: none;
    cursor: pointer;
}
button:hover {
    background: #0056b3;
}