:root {
  --bg: #f4f5f2;
  --surface: #ffffff;
  --text: #16201b;
  --muted: #5d6b64;
  --border: #dde2dd;
  --accent: #128c5e;
  --accent-ink: #ffffff;
  --danger: #b3261e;
  --warn: #9a6700;
  --radius: 12px;
  --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1412;
    --surface: #171e1b;
    --text: #e6ece9;
    --muted: #93a39b;
    --border: #2a3530;
    --accent: #2fbf86;
    --accent-ink: #06130d;
    --danger: #ff8a80;
    --warn: #e3b341;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, 'Segoe UI', sans-serif;
}
a { color: var(--accent); }
main { max-width: 960px; margin: 0 auto; padding: 24px 16px 64px; }
main.narrow { max-width: 440px; }
h1 { font-size: 1.6rem; margin: 8px 0 20px; letter-spacing: -0.01em; }
h2 { font-size: 1.15rem; margin: 28px 0 12px; }
code, pre { font-family: var(--mono); font-size: 0.9em; }
pre { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 12px; overflow-x: auto; }

.nav {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 16px;
  padding: 12px 16px; background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; text-decoration: none; color: var(--text); }
.nav-links { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 16px; }
.nav-links a { text-decoration: none; color: var(--muted); }
.nav-links a:hover { color: var(--text); }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 16px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }

label { display: block; font-weight: 600; margin: 12px 0 4px; }
input[type=text], input[type=password], input[type=tel], input[type=number], select {
  width: 100%; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg); color: var(--text); font: inherit;
}
.checkbox { display: flex; gap: 8px; align-items: center; font-weight: 400; }
button, .button {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 16px; border-radius: 8px; border: 1px solid transparent; cursor: pointer;
  background: var(--accent); color: var(--accent-ink); font: inherit; font-weight: 600; text-decoration: none;
}
button.secondary, .button.secondary { background: transparent; color: var(--text); border-color: var(--border); }
button.danger { background: transparent; color: var(--danger); border-color: var(--danger); }
button.link { background: none; border: none; padding: 0; color: var(--muted); font-weight: 400; }
form.inline { display: inline; margin: 0; }

.badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 0.8rem; font-weight: 600; border: 1px solid var(--border); }
.badge.open { color: var(--accent); border-color: var(--accent); }
.badge.qr, .badge.connecting, .badge.pairing { color: var(--warn); border-color: var(--warn); }
.badge.logged_out, .badge.error { color: var(--danger); border-color: var(--danger); }

.flash { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; border: 1px solid var(--border); background: var(--surface); }
.flash.error { border-color: var(--danger); color: var(--danger); }
.flash.success { border-color: var(--accent); }
.secret { font-family: var(--mono); word-break: break-all; padding: 12px; border-radius: 8px; background: var(--bg); border: 1px dashed var(--accent); }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
.table-wrap { overflow-x: auto; }

.qr-box { display: grid; place-items: center; min-height: 300px; background: #fff; border-radius: var(--radius); padding: 16px; }
.qr-box img { width: 100%; max-width: 280px; image-rendering: pixelated; }
.pairing-code { font-family: var(--mono); font-size: 2rem; letter-spacing: 0.2em; text-align: center; color: #111; }
ol.steps { padding-left: 20px; }
ol.steps li { margin-bottom: 6px; }