:root {
  color-scheme: light;
  --bg: #f3f5f8;
  --panel: #ffffff;
  --text: #162033;
  --muted: #637083;
  --border: #dfe4eb;
  --primary: #246bfd;
  --primary-hover: #1555d6;
  --danger: #c83737;
  --danger-hover: #a92525;
  --success: #16865b;
  font-family: Inter, "Segoe UI", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
button, input, textarea { font: inherit; }
button, .button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
}
button:hover, .button-link:hover { background: #f7f9fc; }
button:disabled { cursor: not-allowed; opacity: .55; }
.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.primary:hover { background: var(--primary-hover); }
.danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.danger:hover { background: var(--danger-hover); }
.full { width: 100%; }

label { display: block; margin: 0 0 7px; font-weight: 600; }
input, textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: #fff;
  color: var(--text);
  padding: 11px 12px;
  outline: none;
}
input:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgb(36 107 253 / 14%); }
textarea { resize: vertical; font-family: Consolas, monospace; line-height: 1.55; }

.centered-page { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 15px;
  padding: 24px;
  box-shadow: 0 12px 32px rgb(33 46 71 / 7%);
}
.login-panel, .device-panel, .setup-panel { width: min(440px, 100%); }
.eyebrow { margin: 0 0 6px; color: var(--primary); font-size: 12px; font-weight: 700; letter-spacing: .12em; }
h1, h2 { margin: 0; }
h1 { font-size: 27px; }
h2 { font-size: 19px; }
.muted { color: var(--muted); }
.message { min-height: 22px; color: var(--danger); }
.login-panel form { margin-top: 24px; }
.login-panel button { margin-top: 14px; }

.topbar {
  max-width: 1180px;
  margin: 0 auto;
  padding: 30px 24px 18px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
}
.revision { color: var(--muted); }
.layout {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px 40px;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 18px;
}
.wide-panel { grid-column: 1 / -1; }
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.section-heading p { margin: 5px 0 0; }
.badge, .status { display: inline-flex; align-items: center; border-radius: 999px; padding: 5px 10px; font-size: 13px; white-space: nowrap; }
.badge { background: #eef2f7; color: var(--muted); }
.status-on { background: #e7f7f0; color: var(--success); }
.status-off { background: #f0f2f5; color: var(--muted); }
.actions, .copy-row { display: flex; align-items: center; gap: 10px; margin-top: 12px; }
.actions .message { margin: 0; }
.copy-row input { flex: 1; }
.enrollment-create-row { margin-top: 0; }
.note-row { display: flex; align-items: center; gap: 7px; min-width: 210px; }
.note-row input { min-width: 130px; padding: 8px 9px; }
.note-row button { min-height: 36px; padding: 0 11px; }
.link-result { margin-top: 16px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 13px 10px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-size: 13px; font-weight: 600; }
td small { display: block; margin-top: 4px; color: var(--muted); }
td .error-text { color: var(--danger); max-width: 280px; }
.empty { color: var(--muted); text-align: center; padding: 24px 0 8px; }

.state-display { display: flex; align-items: center; gap: 10px; margin: 24px 0; padding: 16px; background: #f7f9fc; border-radius: 11px; }
.state-dot { width: 11px; height: 11px; border-radius: 50%; background: #9aa4b2; }
.state-dot.on { background: var(--success); box-shadow: 0 0 0 5px rgb(22 134 91 / 12%); }
.state-dot.off { background: #9aa4b2; }
.device-actions { display: grid; gap: 10px; }
.device-panel form { margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--border); }
.setup-panel p { line-height: 1.65; }

@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; }
  .wide-panel { grid-column: auto; }
  .topbar, .section-heading { align-items: flex-start; }
  .section-heading { flex-direction: column; }
  .copy-row { align-items: stretch; flex-direction: column; }
  .copy-row > * { width: 100%; }
}