:root {
  --bg: #0f172a;
  --bg-soft: #111827;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --primary: #0f766e;
  --primary-2: #115e59;
  --ok: #166534;
  --ok-bg: #dcfce7;
  --bad: #991b1b;
  --bad-bg: #fee2e2;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Tahoma, Arial, sans-serif;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
  color: #fff;
}
.shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}
.topbar h1 { margin: 0 0 8px; font-size: 30px; }
.topbar p { margin: 0; color: #cbd5e1; }
.badge-group { display: flex; gap: 8px; flex-wrap: wrap; }
.badge {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
  color: #e2e8f0;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 13px;
}
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; margin-bottom: 20px; }
.card {
  background: var(--card);
  color: var(--text);
  border-radius: 18px;
  padding: 20px;
  border: 1px solid rgba(255,255,255,.1);
  box-shadow: 0 10px 30px rgba(0,0,0,.12);
  margin-bottom: 20px;
}
.card h2 { margin-top: 0; margin-bottom: 14px; }
.stack { display: flex; flex-direction: column; gap: 12px; }
label { display: block; font-weight: 600; }
input[type="text"], input[type="url"] {
  width: 100%;
  margin-top: 8px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  font-size: 15px;
}
button {
  border: 0;
  background: var(--primary);
  color: #fff;
  padding: 12px 16px;
  border-radius: 12px;
  font-weight: 700;
  cursor: pointer;
}
button:hover { background: var(--primary-2); }
.muted { color: var(--muted); }
.small { font-size: 13px; }
code {
  background: #f1f5f9;
  padding: 2px 6px;
  border-radius: 6px;
}
.big-code { font-size: 22px; letter-spacing: 2px; }
.status {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: #e2e8f0;
}
.status.open { background: #dcfce7; color: #166534; }
.status.close, .status.closed { background: #fee2e2; color: #991b1b; }
.instance-list { display: grid; gap: 12px; }
.instance-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}
.instance-item.selected { border-color: var(--primary); box-shadow: inset 0 0 0 1px var(--primary); }
.two-col { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.checkbox-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
}
.checkbox-row input { margin: 0; }
.compact { font-size: 14px; }
.event-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.result {
  margin-top: 18px;
  border-radius: 14px;
  padding: 16px;
  border: 1px solid var(--line);
}
.result.ok { background: var(--ok-bg); color: var(--ok); }
.result.bad { background: var(--bad-bg); color: var(--bad); }
pre {
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  background: #0f172a;
  color: #e2e8f0;
  padding: 14px;
  border-radius: 12px;
}
.qr-box {
  margin: 16px 0;
  display: inline-flex;
  background: #fff;
  padding: 14px;
  border-radius: 14px;
  box-shadow: 0 6px 20px rgba(0,0,0,.08);
}
.qr-box img {
  width: 240px;
  height: 240px;
  display: block;
}
@media (max-width: 900px) {
  .grid, .two-col, .event-grid { grid-template-columns: 1fr; }
  .topbar { flex-direction: column; }
}