body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: #f5f5f5;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.header h1 {
    font-size: 18px;
    font-weight: 500;
    margin: 0;
}

.header span {
    font-size: 12px;
    color: #999;
}

textarea {
    width: 100%;
    flex: 1;
    min-height: 500px;
    font-size: 16px;
    padding: 8px;
    box-sizing: border-box;
}

.footer {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
    align-items: center;
}

.footer input[type="submit"],
.footer button {
    padding: 6px 12px;
    font-size: 14px;
}

.footer .links {
    margin-left: auto;
    font-size: 12px;
}

.footer .links a {
    margin-left: 12px;
    color: #666;
    text-decoration: none;
}

.footer .links a:hover {
    text-decoration: underline;
}