:root {
    --bg: #fafaf7;
    --fg: #1f2421;
    --muted: #6b716d;
    --accent: #2f6f4f;
    --danger: #b3261e;
    --border: #d9dcd6;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #161917;
        --fg: #e6e8e4;
        --muted: #9aa19c;
        --accent: #7fc4a0;
        --danger: #f2a49d;
        --border: #333a36;
    }
}
* { box-sizing: border-box; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}
.site-header {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    align-items: baseline;
    justify-content: space-between;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; color: var(--fg); text-decoration: none; }
nav { display: flex; gap: 1rem; flex-wrap: wrap; }
main { max-width: 36rem; margin: 0 auto; padding: 1.5rem 1rem 3rem; }
a { color: var(--accent); }
.muted { color: var(--muted); }
.messages { list-style: none; padding: 0; }
.messages li { padding: 0.5rem 0.75rem; border: 1px solid var(--border); border-radius: 6px; margin-bottom: 0.5rem; }
input:not([type=checkbox]):not([type=hidden]) {
    display: block;
    width: 100%;
    padding: 0.5rem;
    margin: 0.25rem 0 0.75rem;
    font: inherit;
    color: var(--fg);
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 6px;
}
button, .button {
    display: inline-block;
    padding: 0.5rem 1rem;
    font: inherit;
    color: var(--bg);
    background: var(--accent);
    border: 0;
    border-radius: 6px;
    text-decoration: none;
    cursor: pointer;
}
button.danger { background: var(--danger); }