.panel {
  background: #fff;
  border: 1px solid #d9dfd7;
  border-radius: 18px;
  box-shadow: 0 8px 30px rgba(33, 45, 35, 0.06);
}

.controls-panel { padding: 22px; }
.preview-panel { padding: 22px; }

.eyebrow {
  margin-bottom: 6px;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  color: #526057;
}

h1 {
  margin-bottom: 8px;
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.05;
}

h2 {
  margin-bottom: 12px;
  font-size: 1rem;
}

.lead, .status-text, #summaryText, .hint-text {
  color: #687168;
}

.build-badge {
  flex: 0 0 auto;
  padding: 6px 10px;
  border: 1px solid #d9dfd7;
  border-radius: 999px;
  background: #fff;
  font-size: 0.75rem;
}

.control-group {
  padding: 0 0 20px;
  margin: 0 0 20px;
  border-bottom: 1px solid #e7ebe5;
}

.control-group label {
  display: grid;
  gap: 7px;
  font-size: 0.82rem;
  font-weight: 700;
}

.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

input[type="number"], input[type="text"], select {
  width: 100%;
  min-height: 42px;
  padding: 9px 11px;
  border: 1px solid #cfd6cd;
  border-radius: 10px;
  background: #fff;
}

input:focus, select:focus {
  outline: 2px solid #365c42;
  outline-offset: 2px;
}

.file-drop {
  display: grid;
  place-items: center;
  min-height: 110px;
  padding: 18px;
  border: 1.5px dashed #9eaaa0;
  border-radius: 14px;
  background: #f8faf7;
  text-align: center;
  cursor: pointer;
  transition: border-color 120ms ease, background-color 120ms ease, transform 120ms ease;
}

.file-drop:hover,
.file-drop.is-dragover {
  border-color: #365c42;
  background: #eef4ef;
}

.file-drop.is-dragover { transform: scale(1.01); }

.file-drop small {
  font-weight: 500;
  color: #7b847c;
}

.layer-controls {
  display: grid;
  gap: 12px;
  margin-top: 14px;
  padding: 14px;
  border: 1px solid #e1e6df;
  border-radius: 12px;
  background: #fafbf9;
}

.layer-controls[hidden] { display: none; }

.hint-text {
  margin: 0;
  font-size: 0.76rem;
}

.layer-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.small-button {
  min-height: 38px;
  border: 1px solid #bcc5bb;
  border-radius: 9px;
  background: #fff;
  font-weight: 700;
}

.danger-button {
  color: #8a342e;
}

.compact-controls {
  display: grid;
  gap: 15px;
}

.range-field span {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.range-field output {
  font-variant-numeric: tabular-nums;
  color: #536057;
}

input[type="range"] { width: 100%; }

.check-field {
  grid-template-columns: auto 1fr !important;
  align-items: center;
  gap: 9px !important;
}

.check-field input {
  width: 18px;
  height: 18px;
  margin: 0;
}

.action-stack {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.primary-button,
.secondary-button {
  min-height: 46px;
  border-radius: 12px;
  font-weight: 800;
}

.primary-button {
  border: 0;
  background: #244b31;
  color: #fff;
}

.secondary-button {
  border: 1px solid #aeb8ae;
  background: #fff;
  color: #244b31;
}

.primary-button:disabled,
.secondary-button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.app-status {
  min-height: 1.4em;
  margin: 12px 0 0;
  font-size: 0.8rem;
  color: #687168;
}

.app-status.is-error { color: #9a2f27; }

.preview-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 12px;
}

.board-size-label {
  flex: 0 0 auto;
  padding: 6px 10px;
  border-radius: 9px;
  background: #eef2ed;
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
}

.pattern-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 14px;
}

.stat-chip {
  padding: 5px 9px;
  border: 1px solid #d9dfd7;
  border-radius: 999px;
  background: #f7f9f6;
  color: #485249;
  font-size: 0.76rem;
  font-variant-numeric: tabular-nums;
}

.preview-stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 590px;
  padding: 14px;
  overflow: auto;
  border-radius: 14px;
  background:
    linear-gradient(45deg, #edf0eb 25%, transparent 25%),
    linear-gradient(-45deg, #edf0eb 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #edf0eb 75%),
    linear-gradient(-45deg, transparent 75%, #edf0eb 75%);
  background-size: 24px 24px;
  background-position: 0 0, 0 12px, 12px -12px, -12px 0;
}

#previewCanvas {
  display: none;
  max-width: 100%;
  max-height: 72vh;
  object-fit: contain;
  touch-action: none;
  cursor: grab;
  background: #fff;
  box-shadow: 0 12px 38px rgba(0,0,0,.12);
}

#previewCanvas:active { cursor: grabbing; }

.empty-preview {
  display: grid;
  gap: 6px;
  color: #6b746c;
  text-align: center;
}

.empty-preview[hidden] {
  display: none;
}


.mask-controls {
  display: grid;
  gap: 12px;
  padding: 12px;
  border: 1px solid #dfe5dd;
  border-radius: 12px;
  background: #f8faf7;
}

.mask-controls[hidden] {
  display: none;
}

.full-width {
  width: 100%;
}

.preview-mode-row,
.segmented-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.segmented-row {
  grid-template-columns: 1fr 1fr;
}

.preview-mode-button {
  min-height: 34px;
  padding: 6px 8px;
  border: 1px solid #bcc5bb;
  border-radius: 8px;
  background: #fff;
  font-size: 0.76rem;
  font-weight: 700;
}

.preview-mode-button.is-active,
.small-button.is-active {
  border-color: #365c42;
  background: #e7f0e9;
  color: #244b31;
}

.mask-edit-panel {
  display: grid;
  gap: 10px;
  padding-top: 2px;
}

#previewCanvas[data-mask-editing="true"] {
  cursor: crosshair;
}