.top{
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px 0;
}
.top a.back{
  font-size: 13.5px; color: var(--text-muted); text-decoration: none;
  display: flex; align-items: center; gap: 6px;
}
.top a.back:hover{ color: var(--text); }

.stage{
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 26px;
  padding-bottom: 70px;
}

.preview{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  min-height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.preview img{
  max-width: 100%; max-height: 520px;
  border-radius: 4px;
  image-rendering: auto;
}
.preview .empty{
  color: var(--text-muted); font-size: 14px; text-align: center;
}

.panel{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.panel h2{
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  margin: 0 0 16px;
}

.tabs{
  display: flex; gap: 8px; margin-bottom: 20px;
}
.tab{
  flex: 1;
  text-align: center;
  padding: 10px 0;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-muted);
}
.tab.active{
  background: var(--grass);
  color: #0f1408;
  border-color: var(--grass);
}

.check-row{
  display: flex; align-items: flex-start; gap: 10px;
  padding: 9px 0;
  font-size: 13.5px;
  cursor: pointer;
}
.check-row input{ margin-top: 3px; accent-color: var(--grass); }
.check-row .hint{
  display: block; font-size: 11.5px; color: var(--text-muted); margin-top: 2px;
}

.field{ margin-bottom: 18px; }
.field label{
  display: block; font-size: 12.5px; color: var(--text-muted); margin-bottom: 7px;
}
select, .num-input{
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 10px 12px;
  color: var(--text);
  font-size: 13.5px;
  font-family: 'JetBrains Mono', monospace;
}

.size-row{
  display: flex; align-items: center; gap: 10px;
}
.size-row .num-input{ width: 90px; text-align: center; }
.size-row .link-icon{
  color: var(--grass-bright); font-size: 15px;
}
.size-eq{
  margin-top: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12.5px;
  color: var(--amber);
}

.custom-filter{
  margin-top: 6px;
}
.custom-filter input.num-input{ width: 100%; margin-bottom: 10px; }
.block-table{
  max-height: 200px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 7px;
}
.block-row{
  display: flex; align-items: center; gap: 10px;
  padding: 6px 10px;
  font-size: 12.5px;
  border-bottom: 1px solid var(--border);
}
.block-row:last-child{ border-bottom: none; }
.block-row img{ width: 18px; height: 18px; image-rendering: pixelated; border-radius: 2px; }
.block-row input{ accent-color: var(--grass); }
.block-count{
  font-size: 11.5px; color: var(--text-muted); margin-top: 8px;
}

.convert-btn{
  width: 100%;
  margin-top: 6px;
  background: #101418;
  color: var(--text);
  border: 1px solid var(--border);
  font-weight: 700;
  font-size: 14px;
  padding: 14px 0;
  border-radius: 8px;
  cursor: pointer;
}
.convert-btn:not(:disabled):hover{ border-color: var(--grass); }
.convert-btn:disabled{ opacity: 0.5; cursor: not-allowed; }

@media (max-width: 860px){
  .stage{ grid-template-columns: 1fr; }
}