:root {
  --bg: #0f1115;
  --fg: #e8eaf0;
  --muted: #9aa0ad;
  --panel: #171a21;
  --border: #262a33;
  --accent: #7cc4ff;
  --warn: #ff8b8b;
  --good: #8bffb0;
  font-family:
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  grid-template-columns: 1fr 300px;
  grid-template-areas:
    'slice slice'
    'viewer side'
    'solver solver';
  gap: 0;
}

.slice-controls {
  grid-area: slice;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: flex-end;
  padding: 0.75rem 1rem;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.control {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.control label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

select,
input[type='range'],
input[type='number'] {
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.25rem 0.4rem;
  font-size: 0.8rem;
}

.control output {
  font-variant-numeric: tabular-nums;
  font-size: 0.8rem;
}

#viewer-wrap {
  grid-area: viewer;
  position: relative;
  overflow: hidden;
}

#viewer {
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

#hint {
  position: absolute;
  top: 8px;
  left: 12px;
  font-size: 0.72rem;
  color: var(--muted);
  background: rgba(0, 0, 0, 0.4);
  padding: 0.3rem 0.5rem;
  border-radius: 6px;
  pointer-events: none;
  max-width: 60%;
}

aside {
  grid-area: side;
  background: var(--panel);
  border-left: 1px solid var(--border);
  overflow-y: auto;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

aside h3 {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.inspector-row {
  font-size: 0.8rem;
  margin-bottom: 0.35rem;
}

.inspector-row .lbl {
  color: var(--muted);
}

.swatch-chip {
  display: inline-block;
  width: 16px;
  height: 16px;
  border-radius: 4px;
  vertical-align: middle;
  border: 1px solid rgba(255, 255, 255, 0.15);
  margin-right: 0.35rem;
}

button {
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.35rem 0.6rem;
  font-size: 0.78rem;
  cursor: pointer;
}

button:hover {
  border-color: var(--accent);
}

button.primary {
  border-color: var(--accent);
  color: var(--accent);
}

button:disabled {
  opacity: 0.4;
  cursor: default;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.anchor-line,
.group-line {
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  margin-bottom: 0.25rem;
}

.anchor-line input[type='number'] {
  width: 64px;
}

.residual {
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  font-size: 0.72rem;
}

.residual.bad {
  color: var(--warn);
}

.residual.good {
  color: var(--good);
}

.solver-controls {
  grid-area: solver;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1rem;
  background: var(--panel);
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.jbig {
  font-variant-numeric: tabular-nums;
  font-size: 1rem;
}

.jbig .v {
  color: var(--accent);
}

.tiny {
  font-size: 0.72rem;
  color: var(--muted);
}