:root {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #f4f5f7;
  color: #1f2933;
}

.layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: #1f2933;
  color: #f0f4f8;
  padding: 1.25rem;
}

.sidebar h1 {
  font-size: 1.05rem;
  margin: 0 0 1.5rem;
}

.sidebar nav a {
  display: block;
  padding: 0.45rem 0.6rem;
  margin: 0.1rem 0;
  border-radius: 6px;
  color: #cbd2d9;
  text-decoration: none;
}

/* --- Grouped navigation (spec section 57) --- */
.nav-section {
  margin-bottom: 0.9rem;
}

.nav-section h2 {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: #7b8794;
  margin: 0.5rem 0 0.25rem;
  padding-left: 0.6rem;
}

/* Unimplemented pages: greyed out, not clickable, tooltip explains why. */
.nav-section button.nav-disabled {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  color: #616e7c;
  padding: 0.45rem 0.6rem;
  margin: 0.1rem 0;
  border-radius: 6px;
  opacity: 0.55;
}

/* Anchor targets inside pages: keep headings clear of the viewport top. */
h3[id] {
  scroll-margin-top: 1rem;
}

.sidebar nav a.active,
.sidebar nav a:hover {
  background: #323f4b;
  color: #fff;
}

.content {
  padding: 1.5rem 2rem;
  max-width: 1100px;
}

.content h2 {
  margin-top: 0;
}

table {
  border-collapse: collapse;
  width: 100%;
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
}

th,
td {
  text-align: left;
  padding: 0.55rem 0.8rem;
  border-bottom: 1px solid #e4e7eb;
  font-size: 0.92rem;
}

th {
  background: #f0f4f8;
}

button {
  font: inherit;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  border: 1px solid #cbd2d9;
  background: #fff;
  cursor: pointer;
}

button.primary {
  background: #1f6feb;
  border-color: #1f6feb;
  color: #fff;
}

button.danger {
  background: #fff;
  border-color: #e5534b;
  color: #e5534b;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

form.stack label,
label {
  display: block;
  margin: 0.6rem 0 0.2rem;
  font-size: 0.85rem;
  color: #52606d;
}

input,
select,
textarea {
  font: inherit;
  padding: 0.45rem 0.55rem;
  border: 1px solid #cbd2d9;
  border-radius: 6px;
  width: 100%;
  background: #fff;
}

.login-card {
  max-width: 340px;
  margin: 12vh auto;
  background: #fff;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 4px 16px rgba(31, 41, 51, 0.12);
}

.banner {
  padding: 0.6rem 0.9rem;
  border-radius: 6px;
  margin: 0.6rem 0;
}

.banner.ok {
  background: #e6f4ea;
  color: #1e6b3a;
}

.banner.error {
  background: #fdecea;
  color: #a4342d;
}

.banner.warn {
  background: #fff6e0;
  color: #8a5a00;
}

.mono {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.85rem;
}

pre.config {
  background: #1f2933;
  color: #d5e3f0;
  padding: 1rem;
  border-radius: 8px;
  overflow: auto;
  max-height: 420px;
}

.password-once {
  background: #fff6e0;
  border: 1px solid #e3b341;
  padding: 0.8rem 1rem;
  border-radius: 8px;
  font-family: ui-monospace, monospace;
}