:root {
  --bg: #f4f6f9;
  --card: #fff;
  --text: #1a1d26;
  --muted: #5c6478;
  --accent: #2563eb;
  --error: #b91c1c;
  --warn: #b45309;
  --border: #e2e8f0;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, sans-serif; background: var(--bg); color: var(--text); line-height: 1.5; }
.container { max-width: 960px; margin: 0 auto; padding: 1rem; }
.header { background: var(--card); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; justify-content: space-between; align-items: center; }
.logo { font-weight: 700; color: var(--text); text-decoration: none; }
nav a { margin-left: 1rem; color: var(--accent); text-decoration: none; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 1.25rem; margin-bottom: 1rem; }
.card.narrow { max-width: 420px; margin: 2rem auto; }
.card.ok { border-color: #16a34a; background: #f0fdf4; }
h1 { margin-top: 0; }
label { display: block; margin-bottom: 1rem; }
input, select, textarea { width: 100%; padding: 0.5rem; margin-top: 0.25rem; border: 1px solid var(--border); border-radius: 4px; }
button, .btn { background: var(--accent); color: #fff; border: none; padding: 0.5rem 1rem; border-radius: 4px; cursor: pointer; text-decoration: none; display: inline-block; }
button.danger, .danger { background: var(--error); }
button.small { padding: 0.25rem 0.5rem; font-size: 0.85rem; }
.error { color: var(--error); }
.warn { color: var(--warn); }
.muted { color: var(--muted); }
table { width: 100%; border-collapse: collapse; background: var(--card); }
th, td { border: 1px solid var(--border); padding: 0.5rem; text-align: left; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 700px) { .grid { grid-template-columns: 1fr; } }
.qr { max-width: 220px; display: block; margin: 1rem 0; }
.profile-block { border-top: 1px solid var(--border); padding-top: 1rem; margin-top: 1rem; }
.actions { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; margin-bottom: 1rem; }
.actions form.inline { display: flex; gap: 0.5rem; align-items: center; }
code { background: #eef2ff; padding: 0.1rem 0.3rem; border-radius: 3px; }
td form { margin: 0; }