:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --text: #17202a;
  --muted: #5f6b78;
  --border: #dde2e8;
  --accent: #88171a;
  --accent-text: #ffffff;
  --ok-bg: #e3f5ea; --ok-fg: #17663a;
  --err-bg: #fbe6e6; --err-fg: #9b1c1c;
  --info-bg: #e7eef9; --info-fg: #1e4b8f;
  --idle-bg: #eceff2; --idle-fg: #4a5561;
  --radius: 10px;
  --mono: ui-monospace, "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1419; --surface: #182029; --text: #e6ebf0; --muted: #98a4b0; --border: #2a3542;
    --accent: #d8474b; --accent-text: #ffffff;
    --ok-bg: #143322; --ok-fg: #7fd8a3;
    --err-bg: #3a1618; --err-fg: #ff9d9d;
    --info-bg: #15263d; --info-fg: #9cc2ff;
    --idle-bg: #232d38; --idle-fg: #aab5c0;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
h1 { font-size: 1.5rem; margin: 0 0 .25rem; }
h2 { font-size: 1.1rem; margin: 0 0 .75rem; }
h3 { font-size: .95rem; margin: 0; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.mono { font-family: var(--mono); font-size: .9em; }
.break { word-break: break-all; }

.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  padding: .75rem 1.25rem; background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: .5rem; font-weight: 700; color: var(--text); text-decoration: none; }
.topbar nav { display: flex; align-items: center; gap: 1.25rem; flex-wrap: wrap; }
.topbar nav a { color: var(--text); text-decoration: none; }
.topbar nav a:hover { color: var(--accent); }
.topbar form { margin: 0; }

.container { max-width: 1080px; margin: 0 auto; padding: 1.5rem 1rem 3rem; }
.page-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.25rem; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; margin-bottom: 1rem; }
.card.empty { text-align: center; padding: 2.5rem 1.25rem; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1rem; align-items: start; }
.grid-2 .card { margin-bottom: 0; }
.grid-2 + .card { margin-top: 1rem; }

input {
  width: 100%; padding: .6rem .7rem; font: inherit; color: var(--text);
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
}
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: .85rem; }
label input { margin-top: .3rem; font-weight: 400; }
.stack { display: block; }

button, .btn {
  display: inline-block; padding: .55rem .95rem; font: inherit; font-weight: 600; line-height: 1.2;
  color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  cursor: pointer; text-decoration: none; white-space: nowrap;
}
button:hover, .btn:hover { border-color: var(--muted); }
button.primary, .btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
button.primary:hover, .btn.primary:hover { filter: brightness(1.1); }
button.danger { color: var(--err-fg); border-color: var(--err-fg); background: transparent; }
button.link { background: none; border: 0; padding: 0; color: var(--text); font-weight: 400; }
button.link:hover { color: var(--accent); }
.btn-row { display: flex; gap: .5rem; flex-wrap: wrap; }
.btn-row form { margin: 0; }
.small-btn { padding: .3rem .6rem; font-size: .85rem; }

.inline-create { display: flex; gap: .5rem; flex: 1 1 340px; max-width: 460px; }
.inline-create input { flex: 1; }

.flash { padding: .7rem 1rem; border-radius: 8px; margin-bottom: 1rem; }
.flash.ok { background: var(--ok-bg); color: var(--ok-fg); }
.flash.error { background: var(--err-bg); color: var(--err-fg); }
.flash.info { background: var(--info-bg); color: var(--info-fg); }

.table-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.card .table-wrap { border: 0; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .7rem .9rem; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 600; }
tbody tr:last-child td { border-bottom: 0; }
td a { text-decoration: none; color: var(--text); }
td a:hover { color: var(--accent); }
tr.disabled td { opacity: .6; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.actions { text-align: right; }

.badge { display: inline-block; padding: .15rem .55rem; border-radius: 999px; font-size: .8rem; font-weight: 600; }
.badge.on { background: var(--ok-bg); color: var(--ok-fg); }
.badge.off { background: var(--err-bg); color: var(--err-fg); }
.badge.idle { background: var(--idle-bg); color: var(--idle-fg); }

.steps { padding-left: 1.2rem; margin: 0 0 1rem; }
.steps li { margin-bottom: .3rem; }
/* QR sempre preto no branco, inclusive no tema escuro, para a câmera ler bem */
.qr { background: #fff; padding: .75rem; border-radius: 8px; max-width: 320px; margin: 0 auto; }
.qr svg { display: block; width: 100%; height: auto; }
.small-qr { max-width: 220px; margin: 0 0 1rem; }
.config-head { display: flex; justify-content: space-between; align-items: center; margin: 1rem 0 .5rem; }
.config {
  margin: 0; padding: 1rem; background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  font: .8rem/1.55 var(--mono); white-space: pre-wrap; word-break: break-all;
}

.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 1rem; }
.card.login { width: 100%; max-width: 380px; padding: 2rem 1.75rem; }
.login-head { text-align: center; margin-bottom: 1.5rem; }
.login-head h1 { margin-top: .5rem; }
.login-head p { margin: 0; }
.card.login button { width: 100%; margin-top: .5rem; padding: .7rem; }

@media (max-width: 600px) {
  .inline-create { flex-direction: column; max-width: none; }
  .topbar nav { gap: .9rem; font-size: .92rem; }
}