body {
    font-family: sans-serif;
    margin: 0;
    padding: 0;
    background: #f8f9fa;
}
header {
    background: #2b3945;
    color: white;
    padding: 2rem;
    text-align: center;
}
main {
    padding: 2rem;
}
input[type="text"] {
    padding: 0.5rem;
    width: 100%;
    max-width: 500px;
    margin-bottom: 1rem;
}
.tabs {
    margin-bottom: 1rem;
}
.tab-button {
    padding: 0.5rem 1rem;
    margin-right: 0.5rem;
    background: #007bff;
    color: white;
    border: none;
    cursor: pointer;
}
.tab-button:hover {
    background: #0056b3;
}
.tab-content {
    background: white;
    padding: 1rem;
    border: 1px solid #ddd;
}