.round-tool .round-layout {
  align-items: flex-start;
  row-gap: 16px;
}
.round-preview-panel,
.round-config-stack {
  min-width: 0;
}
.round-preview-panel {
  height: 100%;
}
.round-panel-header {
  gap: 12px;
}
.round-panel-header > span {
  flex: 1;
  min-width: 0;
}
.round-header-actions {
  display: flex;
  flex: 0 0 auto;
  gap: 8px;
  align-items: center;
}
.round-header-actions .btn-sm {
  min-height: 28px;
  padding-top: 4px;
  padding-bottom: 4px;
}
.round-preview-body {
  gap: 14px;
}
.round-dropzone {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 86px;
  margin: 0;
  padding: 16px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
  background: var(--bg-soft);
  color: var(--text);
  cursor: pointer;
}
.round-dropzone input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}
.round-dropzone-icon {
  display: inline-flex;
  flex: 0 0 44px;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 24px;
}
.round-dropzone-copy {
  display: block;
  min-width: 0;
}
.round-dropzone-title,
.round-dropzone-note {
  display: block;
  min-width: 0;
  line-height: 1.4;
}
.round-dropzone-title {
  font-weight: 700;
}
.round-dropzone-note {
  margin-top: 3px;
  color: var(--text-3);
  font-size: 13px;
}
.round-dropzone.is-dragging {
  border-color: var(--primary);
  background: var(--primary-soft);
}
.round-canvas-stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 360px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: #fff;
  background-image:
    linear-gradient(45deg, #edf2f7 25%, transparent 25%),
    linear-gradient(-45deg, #edf2f7 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #edf2f7 75%),
    linear-gradient(-45deg, transparent 75%, #edf2f7 75%);
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
  background-size: 20px 20px;
  overflow: auto;
}
.round-canvas-stage canvas {
  display: block;
  max-width: 100%;
  height: auto;
  box-shadow: 0 18px 42px rgba(15, 23, 42, .18);
}
.round-preview-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 260px;
  color: var(--text-3);
  text-align: center;
  line-height: 1.45;
}
.round-preview-placeholder i {
  color: var(--primary);
  font-size: 38px;
}
.round-image-meta {
  min-height: 20px;
  color: var(--text-2);
  font-size: 13px;
  line-height: 1.45;
  text-align: center;
}
.round-config-stack {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.round-options-panel,
.round-output-panel {
  background: #fff;
}
.round-preset-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 14px 16px 0;
}
.round-preset-row .btn {
  min-width: 82px;
  justify-content: center;
}
.round-corner-grid,
.round-output-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.round-uniform-check {
  grid-column: 1 / -1;
}
.round-radius-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  margin: 0;
  color: var(--text-2);
  font-size: 13.5px;
  font-weight: 600;
}
.round-radius-field .form-control {
  min-width: 0;
  width: 100%;
}
.round-color-input {
  min-height: 40px;
  padding: 4px 6px;
}
.round-action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 14px 16px 0;
}
.round-action-row .btn {
  min-width: 154px;
  justify-content: center;
}
.round-action-row .btn i,
.round-header-actions .btn i {
  margin-right: 6px;
}
.round-status {
  padding: 12px 16px 16px;
  color: var(--text-2);
  font-size: 13px;
  line-height: 1.45;
}
.round-message {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-top: 16px;
  padding: 10px 12px;
  border: 1px solid #fecaca;
  border-radius: var(--radius);
  background: var(--danger-soft);
  color: var(--danger);
  font-size: 13.5px;
  line-height: 1.45;
}
:root[data-theme="dark"] .round-options-panel,
:root[data-theme="dark"] .round-output-panel,
:root[data-theme="dark"] .round-canvas-stage {
  background-color: #161b22;
}
:root[data-theme="dark"] .round-canvas-stage {
  background-image:
    linear-gradient(45deg, rgba(148, 163, 184, .16) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(148, 163, 184, .16) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(148, 163, 184, .16) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(148, 163, 184, .16) 75%);
}
:root[data-theme="dark"] .round-message {
  border-color: #7f1d1d;
  background: rgba(127, 29, 29, .18);
}
@media (max-width: 991px) {
  .round-canvas-stage {
    min-height: 300px;
  }
}
@media (max-width: 640px) {
  .round-panel-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    row-gap: 8px;
  }
  .round-header-actions,
  .round-action-row,
  .round-preset-row {
    display: grid;
    grid-template-columns: 1fr;
  }
  .round-header-actions .btn,
  .round-action-row .btn,
  .round-preset-row .btn {
    width: 100%;
    min-width: 0;
  }
  .round-corner-grid,
  .round-output-grid {
    grid-template-columns: 1fr;
  }
  .round-preview-body {
    padding: 14px;
  }
  .round-dropzone {
    align-items: flex-start;
    padding: 14px;
  }
  .round-canvas-stage {
    min-height: 260px;
    padding: 12px;
  }
}