body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #f4f6f8;
    color: #24292e;
    margin: 0;
    padding: 2rem;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
}

.container {
    max-width: 1000px;
    width: 100%;
    background-color: #ffffff;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(149, 157, 165, 0.2);
}

header {
    text-align: center;
    border-bottom: 1px solid #e1e4e8;
    padding-bottom: 1.5rem;
    margin-bottom: 2rem;
}

header h1 {
    margin: 0;
    font-size: 2rem;
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.demo-card {
    border: 1px solid #e1e4e8;
    border-radius: 8px;
    padding: 1.5rem;
    background-color: #fcfcfd;
    display: flex;
    flex-direction: column;
}

.demo-card h2 {
    margin-top: 0;
    font-size: 1.25rem;
}

.demo-card p {
    flex-grow: 1;
    color: #586069;
    line-height: 1.5;
}

button {
    background-color: #2ea44f;
    color: white;
    border: 1px solid rgba(27, 31, 35, 0.15);
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 500;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s cubic-bezier(0.3, 0, 0.5, 1);
}

button:hover {
    background-color: #2c974b;
}

footer {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e1e4e8;
}

#status-area {
    background-color: #f6f8fa;
    border: 1px solid #e1e4e8;
    border-radius: 6px;
    padding: 1rem;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 14px;
}

#status-area p {
    margin: 0 0 0.5rem 0;
    font-weight: bold;
}

#response-output {
    margin: 0;
    white-space: pre-wrap;
    word-wrap: break-word;
    color: #586069;
}