* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: monospace;
  font-size: 16px;
  padding: 20px;
  background: #fff;
  color: #000;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
}
h1 { font-size: 16px; font-weight: bold; margin-bottom: 14px; }
.settings { margin-bottom: 12px; display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.settings label { margin-right: 0; font-size: 14px; white-space: nowrap; }
.settings .pair { display: inline-flex; align-items: center; gap: 2px; }
.settings input[type=number] { width: 3.2em; }
input[type=number] { width: 58px; font-family: monospace; font-size: 14px; }
#key-area {
  border: 1px solid #888;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  user-select: none;
  color: #666;
  font-size: 13px;
  margin-bottom: 16px;
}
#key-area.pressed { background: #ddd; }
#diff-area { margin-top: 12px; font-size: 30px; }
#diff-soll, #diff-ist { min-height: 36px; line-height: 36px; }
#diff-ist              { }
.✓ { color: #000; background: lightgreen; border-radius: 2px; }
.⊕ { color: #000; background: lightblue; border-radius: 2px; }
.✗ { color: #000; background: lightsalmon; border-radius: 2px; }
.○ { color: #000; background: #ccc; border-radius: 2px; }
.… { color: #666; background: #e8e8e8; border-radius: 2px; }
.dc     { display: inline-block; min-width: 1ch; text-align: center; }
.dc-sp  { display: inline-block; min-width: 0.55ch; }
.eq-s                  { color: #000; }
.eq-i                  { color: #000; }
.sub-s                 { color: #000; }
.sub-i                 { background: #fdd; color: #c00; border-radius: 2px; }
.ins-s                 { color: transparent; }
.ins-i                 { background: #fdd; color: #c00; border-radius: 2px; }
.del-s                 { color: #000; }
.del-i                 { color: #ccc; }
.pend-s                { color: #000; }
.pend-i                { color: transparent; }
.err-char { color: #c00; text-decoration: underline; text-decoration-color: #c00; text-decoration-thickness: 2px; }
.err-sp   { border-bottom: 2px solid #c00; }
.del-ph   { text-decoration: underline; text-decoration-style: dashed; text-decoration-color: #c00; text-decoration-thickness: 2px; color: transparent; }
#stats { font-size: 13px; color: #555; margin-top: 10px; }
#bravo { font-size: 16px; color: #060; font-weight: bold; margin-top: 6px; min-height: 22px; }
#wpm-result { font-size: 13px; color: #555; margin-top: 4px; min-height: 18px; }
#session-stats { font-size: 13px; color: #555; margin-top: 2px; min-height: 18px; }
#cat-filter { margin-bottom: 10px; font-size: 13px; }
#cat-filter label { margin-right: 14px; cursor: pointer; white-space: nowrap; }
.mode-btn { font-family: monospace; font-size: 13px; padding: 2px 10px; cursor: pointer;
  border: 1px solid #888; background: #fff; margin-top: 0; }
.mode-btn.active { background: #333; color: #fff; border-color: #333; }
#listen-controls { margin-bottom: 16px; }
#listen-input { font-family: monospace; font-size: 20px; width: 100%; padding: 4px 6px;
  border: 1px solid #888; margin-top: 8px; box-sizing: border-box; }
button {
  font-family: monospace;
  font-size: 14px;
  margin-top: 12px;
  padding: 3px 12px;
  cursor: pointer;
}
#chart-wrap { overflow-x: auto; margin-top: 14px; }
#chart-label { font-size: 12px; color: #555; margin-bottom: 3px; }

.legend {
  margin-top: 24px;
  font-size: 14px;
  border-top: 1px solid #ccc;
  padding-top: 12px;
}

.legend table {
  border-collapse: collapse;
}

.legend td {
  padding: 3px 12px 3px 0;
  vertical-align: middle;
}

.swatch {
  display: inline-block;
  width: 60px;
  text-align: center;
  font-family: monospace;
  font-size: 14px;
  border-radius: 2px;
  padding: 1px 4px;
}