body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #f5f5f5;
    color: #111827;
    line-height: 1.55;
    min-height: 100svh;
    display: flex;
    flex-direction: column;
}

header {
    background: #1f2937;
    padding: 1.5rem;
    color: #fff;
}

header h1 {
    margin: 0;
}

main {
    flex: 1;
    width: 100%;
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

section {
    margin-bottom: 2.5rem;
}

h2, h3 {
    margin-top: 0;
}

a {
    color: inherit;
}

ul {
    padding-left: 1.25rem;
}

code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    background: #e5e7eb;
    padding: 0.1rem 0.3rem;
    border-radius: 0.25rem;
}

.panel {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem;
    padding: 1.25rem;
}

footer {
    text-align: center;
    padding: 1.5rem;
    background: #e5e7eb;
    color: #374151;
    margin-top: 3rem;
}

footer a {
    color: inherit;
    text-decoration: underline;
}