:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --border: #dfe3e8;
  --text: #1c2430;
  --muted: #6b7684;
  --accent: #2f6feb;
  --accent-weak: #eaf1fe;
  --danger: #c0392b;
  --ok: #1e8e5a;
  --warn: #b26a00;
  --radius: 8px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.loading { padding: 4rem; text-align: center; color: var(--muted); }

/* Layout */
.shell { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.sidebar {
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 1.25rem 0;
  display: flex;
  flex-direction: column;
}
.brand { font-weight: 700; font-size: 1.1rem; padding: 0 1.25rem 1rem; }
.nav a {
  display: block;
  padding: .5rem 1.25rem;
  color: var(--text);
}
.nav a.active { background: var(--accent-weak); color: var(--accent); font-weight: 600; }
.nav a:hover { text-decoration: none; background: var(--accent-weak); }
.sidebar footer { margin-top: auto; padding: 1rem 1.25rem 0; color: var(--muted); font-size: .85rem; }
.main { padding: 1.75rem 2rem 4rem; max-width: 1100px; }

/* Auth screens */
.auth { display: flex; min-height: 100vh; align-items: center; justify-content: center; }
.auth .card { width: 380px; }

/* Blocks */
h1 { font-size: 1.5rem; margin: 0 0 1.25rem; }
h2 { font-size: 1.1rem; margin: 0 0 .75rem; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}
.row { display: flex; gap: 1rem; flex-wrap: wrap; align-items: flex-end; }
.row > * { flex: 1 1 200px; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }

/* Forms */
label { display: block; font-size: .85rem; color: var(--muted); margin-bottom: .25rem; }
input, select, textarea {
  width: 100%;
  padding: .5rem .6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font: inherit;
  background: #fff;
  color: var(--text);
}
.field { margin-bottom: .9rem; }
.check { display: flex; align-items: center; gap: .5rem; }
.check input { width: auto; }

button {
  font: inherit;
  padding: .5rem .9rem;
  border-radius: 6px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}
button:hover { filter: brightness(1.05); }
button.secondary { background: #fff; color: var(--text); border-color: var(--border); }
button.danger { background: #fff; color: var(--danger); border-color: #eccac6; }
button:disabled { opacity: .5; cursor: default; }
.actions { display: flex; gap: .5rem; flex-wrap: wrap; }

/* Tables */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .55rem .5rem; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); }
td.num { text-align: right; font-variant-numeric: tabular-nums; }

/* Bits */
code, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9em; }
.muted { color: var(--muted); }
.pill {
  display: inline-block; padding: .1rem .5rem; border-radius: 999px;
  font-size: .78rem; font-weight: 600; background: var(--accent-weak); color: var(--accent);
}
.pill.ok { background: #e6f5ee; color: var(--ok); }
.pill.err { background: #fdeceb; color: var(--danger); }
.pill.warn { background: #fdf3e3; color: var(--warn); }
.notice { padding: .7rem .9rem; border-radius: 6px; margin-bottom: 1rem; }
.notice.err { background: #fdeceb; color: var(--danger); }
.notice.ok { background: #e6f5ee; color: var(--ok); }
.secret {
  background: #fffbe6; border: 1px solid #f0e0a0; padding: .75rem;
  border-radius: 6px; word-break: break-all; margin: .5rem 0;
}
.empty { padding: 2rem; text-align: center; color: var(--muted); }
.violations { margin: .25rem 0 0; padding-left: 1.1rem; color: var(--danger); font-size: .85rem; }
.diff-old { color: var(--muted); text-decoration: line-through; }
.diff-new { color: var(--ok); font-weight: 600; }

@media (max-width: 720px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { border-right: none; border-bottom: 1px solid var(--border); }
  .main { padding: 1rem; }
}