:root {
  --nav: #1f2937;
  --nav-hover: #4b5563;
  --text: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;
  --page: #ffffff;
  --band: #f9fafb;
  --red: #d14836;
  --red-hover: #b91c1c;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.06);
  --radius: 6px;
  color-scheme: light;
  font-family: Inter, "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--page);
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; min-height: 100vh; }
button, input { font: inherit; }
button { cursor: pointer; }
h1, h2, p { margin: 0; }
h1 { font-size: 1.875rem; line-height: 2.25rem; font-weight: 600; letter-spacing: -0.02em; }
h2 { font-size: 1rem; margin: 1.1rem 0 0.55rem; }
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  height: 48px;
  background: var(--nav);
  z-index: 40;
  color: #d1d5db;
}
.nav-inner {
  max-width: 72rem;
  margin: 0 auto;
  height: 100%;
  padding: 0 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: #fff;
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  padding: 0.35rem 0.45rem;
  border-radius: var(--radius);
}
.brand:hover { background: var(--nav-hover); }
.mark { width: 22px; height: 12px; display: block; }
.nav-links { display: flex; gap: 0.25rem; margin-left: 0.75rem; }
.nav-links a {
  color: #d1d5db;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
}
.nav-links a:hover, .nav-links a[aria-current="page"] { background: var(--nav-hover); color: #fff; }
main { max-width: 44rem; margin: 0 auto; padding: 4.5rem 1rem 3rem; }
.page-head { display: flex; justify-content: space-between; gap: 1rem; align-items: flex-start; margin-bottom: 1rem; }
.lede { color: var(--muted); margin-top: 0.4rem; line-height: 1.5; }
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.1rem 1.15rem 1.2rem;
  margin-bottom: 1rem;
}
label { display: block; font-size: 0.92rem; font-weight: 600; margin: 0.75rem 0; }
input[type="text"], input[type="password"], input:not([type]) {
  display: block;
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-weight: 400;
}
.modes { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }
.mode {
  display: flex;
  gap: 0.45rem;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.65rem 0.75rem;
  font-weight: 500;
  margin: 0;
}
.mode:has(input:checked) { border-color: var(--text); background: var(--band); }
.meta { color: var(--muted); font-size: 0.9rem; line-height: 1.45; margin-top: 0.35rem; }
code { font-size: 0.86em; }
.actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.4rem; }
.btn-primary, .btn-white {
  border: 0;
  border-radius: var(--radius);
  padding: 0.55rem 0.9rem;
  font-weight: 600;
}
.btn-primary { background: var(--red); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--red-hover); }
.btn-white { background: #fff; color: var(--text); border: 1px solid var(--line); }
button:disabled { opacity: 0.55; cursor: default; }
.error { color: var(--red); margin-top: 0.6rem; }
.status-row { display: flex; align-items: center; gap: 0.55rem; }
.lamp {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: #9ca3af;
}
.lamp.is-live { background: #16a34a; }
.lamp.is-wait { background: #d97706; }
.lamp.is-error { background: var(--red); }