* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: #f7f8fa;
  color: #1f2937;
}
.container {
  max-width: 880px;
  margin: 2rem auto;
  padding: 0 1rem;
}
.card {
  background: white;
  border-radius: 12px;
  padding: 1rem;
  margin: 1rem 0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.07);
}
.row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  align-items: center;
}
.grid {
  display: grid;
  gap: 0.75rem;
}
label {
  display: grid;
  gap: 0.3rem;
}
label.inline {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
input, button, .btn {
  font: inherit;
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  border: 1px solid #cbd5e1;
}
button, .btn {
  background: #0f4db8;
  border-color: #0f4db8;
  color: white;
  text-decoration: none;
  cursor: pointer;
}
button.secondary, .btn.secondary {
  background: #eef2ff;
  color: #1f2937;
  border-color: #dbe3ff;
}
.muted { color: #6b7280; }
.small { font-size: 0.9rem; }
.qr-output {
  margin-top: 1rem;
  display: grid;
  gap: 0.6rem;
}
.qr-output svg {
  width: 280px;
  height: 280px;
  max-width: 100%;
  border: 1px solid #e5e7eb;
  background: #fff;
  border-radius: 8px;
  padding: 0.5rem;
}
code {
  background: #f3f4f6;
  padding: 0.1rem 0.3rem;
  border-radius: 6px;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}
th, td {
  padding: 0.5rem;
  border-bottom: 1px solid #e5e7eb;
  text-align: left;
  vertical-align: top;
}