* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, Segoe UI, Arial, sans-serif;
  background: #111318;
  color: #e8edf2;
}
header {
  padding: 14px 18px;
  border-bottom: 1px solid #2d333b;
}
h1, h2, p { margin: 0; }
header p { margin-top: 4px; color: #b5c0cb; }
.layout {
  display: grid;
  grid-template-columns: 360px 1fr;
  min-height: calc(100vh - 74px);
}
.panel { padding: 14px; }
.controls {
  border-right: 1px solid #2d333b;
  overflow: auto;
}
.controls h2 {
  margin: 12px 0 10px;
  font-size: 15px;
  color: #c8d3de;
}
.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
}
.row-full {
  grid-template-columns: 1fr;
}
.row small { grid-column: 1 / -1; color: #9ea8b2; }
label { font-size: 13px; color: #c0cad4; }
input, button, .file-label {
  border: 1px solid #39424d;
  background: #1b2129;
  color: #e8edf2;
  border-radius: 6px;
  padding: 7px 9px;
  font-size: 13px;
}
textarea {
  border: 1px solid #39424d;
  background: #1b2129;
  color: #e8edf2;
  border-radius: 6px;
  padding: 7px 9px;
  font-size: 13px;
  resize: vertical;
}
.legend-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  width: 100%;
  min-width: 0;
}
.legend-cell {
  border: 1px solid #39424d;
  border-radius: 6px;
  padding: 6px;
  background: #171d24;
  display: grid;
  grid-template-columns: 1fr minmax(2.25rem, 2.75rem);
  gap: 4px;
  align-items: center;
  min-width: 0;
  overflow: hidden;
}
.legend-cell small {
  grid-column: 1 / -1;
  color: #9ea8b2;
  font-size: 11px;
  line-height: 1.2;
}
.legend-cell input[type="text"] {
  min-width: 0;
  width: 100%;
  padding: 4px 6px;
  font-size: 12px;
}
.legend-cell input[type="number"] {
  width: 100%;
  min-width: 0;
  padding: 4px 2px;
  font-size: 12px;
  text-align: center;
}
button, .file-label {
  cursor: pointer;
  text-align: center;
}
button:hover, .file-label:hover { background: #242b35; }
input[type="file"] { display: none; }
.preview { overflow: auto; }
#svgWrap {
  margin-top: 10px;
  padding: 12px;
  background: #0e1217;
  border: 1px solid #2d333b;
  border-radius: 8px;
}
.key-hit {
  cursor: pointer;
}
.key-hit.selected {
  stroke: #4da3ff !important;
  stroke-width: 0.7 !important;
}