.tool-ui {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
  color: var(--text);
}

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 36px 20px;
  text-align: center;
  background: var(--surface);
  cursor: pointer;
  transition: all 0.2s ease;
  color: var(--text);
}

.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.file-label {
  color: var(--accent);
  text-decoration: underline;
  cursor: pointer;
  font-weight: 500;
}

.watermark-controls {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  color: var(--text);
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.control-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
}

.control-group input[type="text"],
.control-group select,
.control-group input[type="range"],
.control-group input[type="color"] {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  font-size: 0.9rem;
  font-family: inherit;
}

.control-group input[type="text"]:focus,
.control-group select:focus {
  outline: none;
  border-color: var(--accent-line);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.control-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.radio-group {
  display: flex;
  gap: 16px;
  align-items: center;
  color: var(--text);
}

.radio-group label {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  color: var(--text);
  font-size: 0.9rem;
}

.btn-primary {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 10px;
  padding: 14px;
  font-weight: 600;
  font-family: 'DM Sans', sans-serif;
  cursor: pointer;
  transition: opacity 0.2s;
  text-align: center;
}

.btn-primary:hover:not(:disabled) {
  opacity: 0.9;
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.hidden {
  display: none !important;
}