:root {
  --bg: #f6f4ef; --panel: #fffdf9; --ink: #1f1d1a; --muted: #6b665e;
  --line: #e2ddd3; --accent: #7a4b1f; --accent-ink: #fff; --side: #2b2621;
  --side-ink: #e9e3d8; --side-muted: #a8a094; --ok: #2f7a3d; --warn: #a33;
  --bar: #c9b8a2;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171513; --panel: #1f1c19; --ink: #ece7de; --muted: #a39b8f; --line: #35302a;
    --accent: #c98b4c; --accent-ink: #1a1410; --side: #100e0c;
    --side-ink: #ece7de; --side-muted: #8a8276; --bar: #5c4a35;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); }
h1 { font-size: 1.5rem; margin: 0 0 1rem; }
h2 { font-size: 1.1rem; margin: 1.5rem 0 .5rem; }
.layout { display: flex; min-height: 100vh; }
.sidebar { width: 240px; flex: none; background: var(--side); color: var(--side-ink);
  display: flex; flex-direction: column; padding: 1rem 0; }
.brand { padding: 0 1.25rem .75rem; font-weight: 700; font-size: 1.2rem; }
.brand a { color: inherit; text-decoration: none; }
.brand span { display: block; font-weight: 400; font-size: .8rem; color: var(--side-muted); }
.brand.big { font-size: 1.6rem; padding: 0 0 .5rem; color: var(--ink); }
.brand.big span { color: var(--muted); }
.sidebar nav { flex: 1; }
.section h2 { margin: 1rem 1.25rem .25rem; font-size: .75rem; text-transform: uppercase;
  letter-spacing: .06em; color: var(--side-muted); }
.section a { display: block; padding: .4rem 1.25rem; color: var(--side-ink);
  text-decoration: none; }
.section a:hover { background: rgba(255,255,255,.06); }
.section a.active { background: var(--accent); color: var(--accent-ink); }
.whoami { padding: 1rem 1.25rem 0; font-size: .85rem; color: var(--side-muted);
  display: flex; justify-content: space-between; align-items: center; gap: .5rem; }
.whoami span { color: var(--side-ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
main { flex: 1; padding: 1.5rem 2rem; max-width: 1100px; min-width: 0; }
.flash { background: var(--panel); border: 1px solid var(--line); border-left: 4px solid var(--ok);
  padding: .6rem .9rem; margin-bottom: 1rem; border-radius: 4px; }
.error { color: var(--warn); }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1rem; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 1rem; }
.card h3 { margin: 0 0 .5rem; font-size: .9rem; color: var(--muted); font-weight: 600; }
.card .big { font-size: 1.6rem; font-weight: 700; }
table { border-collapse: collapse; width: 100%; background: var(--panel);
  border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
th, td { text-align: left; padding: .5rem .7rem; border-bottom: 1px solid var(--line);
  vertical-align: top; }
th { font-size: .8rem; color: var(--muted); font-weight: 600; text-transform: uppercase;
  letter-spacing: .04em; }
tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
form.inline { display: inline; }
form.row { display: flex; flex-wrap: wrap; gap: .5rem; align-items: end; margin: .5rem 0 1rem; }
label { display: block; font-size: .8rem; color: var(--muted); margin-bottom: .15rem; }
label.check { display: inline-flex; align-items: center; gap: .4rem; color: var(--ink);
  font-size: .95rem; margin-right: 1rem; }
input[type=text], input[type=number], input[type=date], input[type=search], select, textarea {
  font: inherit; padding: .4rem .55rem; border: 1px solid var(--line); border-radius: 4px;
  background: var(--panel); color: var(--ink); min-width: 8rem; }
input[type=file] { font: inherit; }
button, .button { font: inherit; padding: .45rem .9rem; border: 1px solid var(--accent);
  border-radius: 4px; background: var(--accent); color: var(--accent-ink); cursor: pointer;
  text-decoration: none; display: inline-block; }
button.secondary, .button.secondary { background: transparent; color: var(--accent); }
button.danger { background: transparent; color: var(--warn); border-color: var(--warn); }
button.link { background: none; border: 0; padding: 0; color: var(--accent); cursor: pointer; }
.actions { display: flex; gap: .5rem; flex-wrap: wrap; margin: 1rem 0; }
.bar { height: 10px; background: var(--line); border-radius: 5px; overflow: hidden; }
.bar > div { height: 100%; background: var(--bar); }
.tag { display: inline-block; font-size: .75rem; padding: .05rem .4rem; border-radius: 3px;
  background: var(--line); color: var(--ink); margin-right: .25rem; }
.tag.ok { background: #dcefdd; color: #1f5a2a; }
.tag.warn { background: #f4d9d9; color: #7a1f1f; }
pre { background: var(--panel); border: 1px solid var(--line); padding: .6rem .8rem;
  white-space: pre-wrap; word-break: break-word; border-radius: 4px; }
details summary { cursor: pointer; color: var(--accent); }
.fieldset { border: 1px solid var(--line); border-radius: 6px; padding: .75rem 1rem; margin: .75rem 0; }
.fieldset h3 { margin: 0 0 .5rem; font-size: 1rem; }
.topics { columns: 2; column-gap: 1.5rem; }
.topics label.check { display: flex; margin: 0 0 .2rem; break-inside: avoid; }
body.centered { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.card.login { max-width: 420px; padding: 2rem; text-align: center; }
@media (max-width: 800px) {
  .layout { flex-direction: column; }
  .sidebar { width: auto; }
  .sidebar nav { display: flex; flex-wrap: wrap; }
  .section { flex: 1 1 50%; }
  main { padding: 1rem; }
  .topics { columns: 1; }
}