:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --ink: #1c2330;
  --muted: #6b7686;
  --line: #e3e7ee;
  --accent: #2563eb;
  --ok: #15803d;
  --ok-bg: #eaf7ee;
  --err: #b91c1c;
  --err-bg: #fdeaea;
  --radius: 12px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  -webkit-text-size-adjust: 100%;
}
.topbar {
  background: linear-gradient(135deg, #1e3a8a, #2563eb);
  color: #fff;
  padding: 22px 16px;
  text-align: center;
}
.topbar h1 { margin: 0 0 4px; font-size: 1.5rem; }
.subtitle { margin: 0; opacity: .85; font-size: .95rem; }
.wrap { max-width: 720px; margin: 0 auto; padding: 16px; }
.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}
.tab {
  flex: 1;
  padding: 12px;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: var(--radius);
  font-size: 1rem;
  cursor: pointer;
  color: var(--muted);
}
.tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
.panel {
  display: none;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}
.panel.active { display: block; }
label { display: block; margin-bottom: 12px; font-weight: 600; font-size: .92rem; }
input, select, textarea {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 11px 12px;
  font-size: 1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--accent);
  border-color: var(--accent);
}
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.portrow { display: flex; gap: 8px; margin-top: 6px; }
.portrow select { margin-top: 0; }
.hint { display: block; font-weight: 400; color: var(--muted); font-size: .8rem; margin-top: 6px; }
.check { display: flex; align-items: center; gap: 8px; font-weight: 400; }
.check input { width: auto; margin: 0; }
.hidden { display: none !important; }
.card {
  border: 1px dashed var(--line);
  border-radius: 8px;
  padding: 12px;
  margin: 4px 0 12px;
  background: #fafbfd;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 6px;
}
.btn {
  padding: 12px 18px;
  font-size: 1rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  cursor: pointer;
  background: #fff;
}
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
.btn.ghost { color: var(--muted); }
.btn:disabled { opacity: .6; cursor: wait; }
.result { margin-top: 16px; }
.step {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 8px;
  background: #fff;
}
.step .head { display: flex; gap: 8px; align-items: baseline; }
.step .badge { font-weight: 700; }
.step.ok .badge { color: var(--ok); }
.step.fail .badge { color: var(--err); }
.step .ms { margin-left: auto; color: var(--muted); font-size: .8rem; white-space: nowrap; }
.step pre {
  margin: 8px 0 0;
  padding: 8px;
  background: #0f172a;
  color: #dbe4f0;
  border-radius: 6px;
  font-size: .8rem;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 220px;
  overflow: auto;
}
.verdict {
  padding: 12px;
  border-radius: 8px;
  font-weight: 600;
  margin-bottom: 10px;
}
.verdict.ok { background: var(--ok-bg); color: var(--ok); }
.verdict.fail { background: var(--err-bg); color: var(--err); }
.note {
  margin: 18px 4px 30px;
  font-size: .85rem;
  color: var(--muted);
  text-align: center;
}
@media (max-width: 640px) {
  .grid2 { grid-template-columns: 1fr; }
  .topbar h1 { font-size: 1.25rem; }
  .btn { flex: 1 1 100%; }
}