:root {
  --bg: #f6f8fb;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --line: #d7deea;
  --primary: #0a66c2;
  --primary-dark: #084f95;
  --danger: #b42318;
  --ok: #067647;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  background: radial-gradient(circle at 10% 0%, #e3eefc 0%, #f6f8fb 40%), var(--bg);
  color: var(--text);
}

.shell {
  max-width: 1080px;
  margin: 0 auto;
  padding: 28px 16px 48px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
  box-shadow: 0 12px 30px rgba(9, 30, 66, 0.08);
}

.hero h1,
header h1 { margin: 0 0 8px; }

.muted { color: var(--muted); }
.row {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.row.wrap { flex-wrap: wrap; }

.btn {
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 14px;
  background: #fff;
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  font-weight: 600;
}

.btn.primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.btn.primary:hover { background: var(--primary-dark); }
.btn.link { border: none; padding: 0; background: transparent; color: var(--primary); }

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 1000px) {
  .grid { grid-template-columns: 1fr 1fr; }
}

label {
  font-size: 14px;
  font-weight: 600;
  margin: 8px 0 6px;
  display: block;
}

input, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  font: inherit;
}

textarea {
  min-height: 150px;
  resize: vertical;
  font-family: "IBM Plex Mono", "Consolas", monospace;
}

.status {
  margin: 12px 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafc;
}

.status.ok { border-color: #a7f3d0; color: var(--ok); }
.status.err { border-color: #fecaca; color: var(--danger); }

.table-wrap { overflow-x: auto; }
table {
  border-collapse: collapse;
  width: 100%;
  font-size: 14px;
}
th, td {
  padding: 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  white-space: nowrap;
}

code {
  background: #eef2ff;
  padding: 2px 6px;
  border-radius: 6px;
}

pre {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  overflow: auto;
  font-size: 12px;
}