:root {
  --bg: #f6f6f4;
  --panel: #ffffff;
  --text: #1c1c1a;
  --muted: #6b6b66;
  --line: #e2e1dc;
  --accent: #1f5f4a;
  --accent-text: #ffffff;
  --danger: #a3341f;
  --notice-bg: #e7f2ec;
  --error-bg: #f8e6e1;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161615;
    --panel: #1f1f1d;
    --text: #ecebe6;
    --muted: #9b9a93;
    --line: #34332f;
    --accent: #5fb394;
    --accent-text: #0f1a16;
    --danger: #e0806b;
    --notice-bg: #1d2d26;
    --error-bg: #34211c;
  }
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
       font: 14px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
button, input, select { font: inherit; color: inherit; }

.shell { display: flex; min-height: 100vh; }
.sidebar { width: 200px; flex: none; padding: 20px 12px; border-right: 1px solid var(--line);
           background: var(--panel); display: flex; flex-direction: column; gap: 2px; }
.sidebar a { padding: 6px 10px; border-radius: 6px; color: var(--text); text-decoration: none; }
.sidebar a.active, .sidebar a:hover { background: var(--bg); }
.sidebar-foot { margin-top: auto; padding: 0 10px; color: var(--muted); }
.brand { font-weight: 600; padding: 0 10px 16px; }
.brand span { color: var(--muted); font-weight: 400; }
main { flex: 1; min-width: 0; padding: 24px 32px; }

.page-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.page-head h1 { font-size: 20px; margin: 0; }
.actions { display: flex; gap: 8px; }

input, select { padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; background: var(--panel); }
button { padding: 6px 12px; border: 1px solid var(--line); border-radius: 6px; background: var(--panel); cursor: pointer; }
button:hover { border-color: var(--muted); }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
button.danger { color: var(--danger); }
button.link { border: 0; padding: 0; background: none; color: var(--muted); text-decoration: underline; }

.card { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 20px; }
.form { margin: 16px 0; display: grid; gap: 12px; max-width: 420px; }
.form h2 { font-size: 16px; margin: 0; }
label { display: grid; gap: 4px; color: var(--muted); }
label input, label select { color: var(--text); }
.form-actions { display: flex; gap: 8px; }

.notice, .error { padding: 8px 12px; border-radius: 6px; margin: 16px 0 0; }
.notice { background: var(--notice-bg); }
.error { background: var(--error-bg); color: var(--danger); }

.users { width: 100%; border-collapse: collapse; margin-top: 16px; background: var(--panel);
         border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.users th, .users td { text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--line); }
.users th { color: var(--muted); font-weight: 500; }
.users tr.muted td { color: var(--muted); }
.users .empty { color: var(--muted); text-align: center; }
.row-actions { white-space: nowrap; text-align: right; }
.row-actions button { padding: 3px 8px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.tag { padding: 1px 8px; border-radius: 999px; border: 1px solid var(--line); font-size: 12px; }
.tag.admin { border-color: var(--accent); color: var(--accent); }

.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login .card { width: 100%; max-width: 340px; display: grid; gap: 12px; }

@media (max-width: 720px) {
  .shell { flex-direction: column; }
  .sidebar { width: auto; flex-direction: row; align-items: center; border-right: 0; border-bottom: 1px solid var(--line); }
  .brand { padding-bottom: 0; }
  .sidebar-foot { margin: 0 0 0 auto; }
  main { padding: 16px; }
  .users { display: block; overflow-x: auto; }
}