:root {
    color-scheme: light dark;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --bg: #0d1117;
    --card: #161b22;
    --border: #30363d;
    --text: #e6edf3;
    --muted: #8b949e;
    --accent: #2f81f7;
    --accent-hover: #1f6feb;
    --success-bg: #16351f;
    --success-border: #238636;
    --error-bg: #491b1b;
    --error-border: #f85149;
    --warn: #d29922;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
.topbar {
    display: flex; justify-content: space-between; align-items: center; gap: 1rem;
    padding: 1.5rem max(1.25rem, calc((100vw - 1100px)/2));
    border-bottom: 1px solid var(--border);
}
.topbar h1 { margin: 0 0 .25rem; font-size: 1.45rem; }
.topbar p { margin: 0; color: var(--muted); }
main { max-width: 1100px; margin: 2rem auto; padding: 0 1.25rem 3rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 1rem; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 1.25rem; }
.login-card { max-width: 420px; margin: 4rem auto; }
h2 { margin-top: 0; text-transform: capitalize; }
label { display: block; margin-bottom: .45rem; font-weight: 600; }
input[type="password"], input[type="file"] {
    width: 100%; padding: .75rem; border: 1px solid var(--border); border-radius: 8px; background: var(--bg); color: var(--text);
}
input[type="password"] { margin-bottom: .9rem; }
.deploy-form { margin: 1.25rem 0; }
.deploy-form input { margin-bottom: .9rem; }
.button {
    appearance: none; border: 1px solid var(--accent); background: var(--accent); color: white;
    border-radius: 8px; padding: .7rem 1rem; font-weight: 700; cursor: pointer;
}
.button:hover { background: var(--accent-hover); }
.button.secondary { background: transparent; border-color: var(--border); color: var(--text); }
.button.small { padding: .4rem .65rem; font-size: .85rem; }
.button:disabled { opacity: .45; cursor: not-allowed; }
.status { display: inline-block; margin: .2rem .25rem .2rem 0; padding: .22rem .5rem; border-radius: 999px; font-size: .78rem; }
.status.ok { background: var(--success-bg); border: 1px solid var(--success-border); }
.status.bad { background: var(--error-bg); border: 1px solid var(--error-border); }
.status.warn { border: 1px solid var(--warn); color: var(--warn); }
.notice { margin-bottom: 1rem; padding: .9rem 1rem; border: 1px solid var(--border); border-radius: 10px; color: var(--muted); }
.messages { margin-bottom: 1rem; }
.message { padding: .9rem 1rem; border-radius: 10px; margin-bottom: .6rem; }
.message.success { background: var(--success-bg); border: 1px solid var(--success-border); }
.message.error { background: var(--error-bg); border: 1px solid var(--error-border); }
summary { cursor: pointer; font-weight: 700; }
.backup-list { margin-top: .8rem; }
.backup-row { display: flex; justify-content: space-between; align-items: center; gap: .75rem; padding: .55rem 0; border-top: 1px solid var(--border); }
.muted { color: var(--muted); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
@media (prefers-color-scheme: light) {
    :root { --bg:#f6f8fa; --card:#fff; --border:#d0d7de; --text:#1f2328; --muted:#656d76; --success-bg:#dafbe1; --error-bg:#ffebe9; }
}