:root {
  font-family: system-ui, sans-serif;
  color: #0f172a;
  background: #f8fafc;
}
body {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem;
}
header h1 {
  margin: 0 0 0.5rem;
}
.muted {
  color: #64748b;
  font-size: 0.95rem;
}
code {
  background: #e2e8f0;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
}
.tabs {
  display: flex;
  gap: 0.25rem;
  margin: 1.5rem 0 1rem;
  flex-wrap: wrap;
}
.tab {
  padding: 0.5rem 1rem;
  border: 1px solid #cbd5e1;
  background: #fff;
  border-radius: 6px;
  cursor: pointer;
}
.tab.active {
  background: #0f172a;
  color: #fff;
  border-color: #0f172a;
}
.panel {
  display: none;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 1rem 1.25rem;
}
.panel.active {
  display: block;
}
label {
  display: block;
  margin: 0.75rem 0 0.25rem;
  font-weight: 600;
  font-size: 0.85rem;
}
textarea,
input[type="password"] {
  width: 100%;
  box-sizing: border-box;
  font-family: ui-monospace, monospace;
  font-size: 0.85rem;
  padding: 0.5rem;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
}
button {
  margin-top: 0.75rem;
  padding: 0.5rem 1rem;
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
}
button:hover {
  background: #1d4ed8;
}
.row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: flex-end;
  margin-top: 0.5rem;
}
.row select {
  padding: 0.45rem;
  border-radius: 6px;
}
.out {
  margin-top: 1rem;
  padding: 1rem;
  background: #0f172a;
  color: #e2e8f0;
  border-radius: 6px;
  overflow: auto;
  max-height: 420px;
  font-size: 0.8rem;
}
.demo-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}