.mode-tabs {
  display: flex;
  gap: 0;
  padding-top: 24px;
  border-bottom: 2px solid #e5e6eb;
}

.mode-tab {
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 500;
  color: #86909c;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.mode-tab:hover { color: #165DFF; }
.mode-tab.active { color: #165DFF; border-bottom-color: #165DFF; }

.b64-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding: 24px 0 16px;
}

@media (max-width: 900px) {
  .b64-grid { grid-template-columns: 1fr; }
}

.b64-col .tool-input-area {
  min-height: 240px;
  font-size: 13px;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  line-height: 1.6;
}

.panel-actions {
  display: flex;
  gap: 6px;
}

.btn-tiny {
  padding: 2px 10px;
  font-size: 12px;
  border: 1px solid #e5e6eb;
  border-radius: 4px;
  background: #fff;
  color: #4e5969;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-tiny:hover {
  border-color: #165DFF;
  color: #165DFF;
  background: #f0f5ff;
}

.text-info {
  margin-top: 8px;
  font-size: 12px;
  color: #86909c;
  min-height: 18px;
}

.text-actions {
  display: flex;
  gap: 12px;
  padding-bottom: 48px;
}

.text-actions .btn {
  display: flex;
  align-items: center;
  gap: 6px;
}

.img-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding: 24px 0 48px;
}

@media (max-width: 900px) {
  .img-grid { grid-template-columns: 1fr; }
}

.img-preview {
  margin-top: 12px;
  text-align: center;
}

.img-preview img {
  max-width: 100%;
  max-height: 200px;
  border: 1px solid #e5e6eb;
  border-radius: 8px;
  object-fit: contain;
}

.img-info {
  margin-top: 8px;
  font-size: 12px;
  color: #86909c;
}

.img-decode-actions {
  margin-top: 12px;
}

.img-decode-preview {
  margin-top: 12px;
  text-align: center;
}

.img-decode-preview img {
  max-width: 100%;
  max-height: 200px;
  border: 1px solid #e5e6eb;
  border-radius: 8px;
  object-fit: contain;
}

.img-decode-info {
  margin-top: 8px;
  font-size: 12px;
  color: #86909c;
}

.img-right .tool-input-area {
  min-height: 300px;
  font-size: 12px;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  line-height: 1.5;
  word-break: break-all;
}

.b64-stats {
  margin-top: 8px;
  font-size: 12px;
  color: #86909c;
}

@media (max-width: 600px) {
  .mode-tabs { padding-top: 16px; }
  .mode-tab { padding: 10px 16px; font-size: 14px; }
  .text-actions { flex-direction: column; }
}