* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: #0f1419;
  color: #e6edf3;
  line-height: 1.5;
}
.shell {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem;
}
.top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid #30363d;
}
h1 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
}
.actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}
.inline {
  margin: 0;
}
.btn {
  display: inline-block;
  padding: 0.5rem 1.1rem;
  border-radius: 8px;
  border: 1px solid transparent;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}
.btn.primary {
  background: #238636;
  color: #fff;
}
.btn.primary:hover {
  background: #2ea043;
}
.btn.secondary {
  background: #21262d;
  border-color: #30363d;
  color: #e6edf3;
}
.btn.secondary:hover:not([disabled]) {
  border-color: #58a6ff;
  color: #58a6ff;
}
.btn[disabled] {
  opacity: 0.45;
  cursor: not-allowed;
}
.preview {
  margin-top: 1.5rem;
}
.preview h2 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}
.hint {
  margin: 0 0 0.75rem;
  color: #8b949e;
  font-size: 0.9rem;
}
.mapping-ref {
  margin-top: 1.25rem;
}
.mapping-ref details {
  border: 1px solid #30363d;
  border-radius: 8px;
  padding: 0.6rem 0.85rem;
  background: #161b22;
}
.mapping-ref summary {
  cursor: pointer;
  font-size: 0.95rem;
  color: #58a6ff;
}
.map-table {
  width: 100%;
  margin-top: 0.75rem;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.map-table th,
.map-table td {
  border: 1px solid #30363d;
  padding: 0.4rem 0.55rem;
  text-align: left;
  vertical-align: top;
}
.map-table th {
  background: #21262d;
  color: #8b949e;
}
.map-table code {
  font-size: 0.82em;
  color: #79c0ff;
}
.template-note {
  margin: 0.2rem 0 0;
}
.tag {
  display: inline-block;
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.tag.mapped {
  background: #23863633;
  color: #3fb950;
}
.tag.stub {
  background: #9e6a0333;
  color: #d29922;
}
.tag.todo {
  background: #30363d;
  color: #8b949e;
}
.box {
  margin: 0;
  padding: 1rem;
  background: #161b22;
  border: 1px solid #30363d;
  border-radius: 8px;
  max-height: min(70vh, 640px);
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.85rem;
}
.msg {
  margin: 1rem 0 0;
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  font-size: 0.9rem;
}
.msg.error {
  background: #3d1f1f;
  border: 1px solid #f85149;
  color: #ffdcd7;
}
.msg.ok {
  background: #1f3d2a;
  border: 1px solid #3fb950;
  color: #aff5c3;
}