/* SVG to PNG & Data URI Converter - Content Area Styles */
:root {
  --spc-bg: #ffffff;
  --spc-surface: #f8fafc;
  --spc-card: #ffffff;
  --spc-border: #e2e8f0;
  --spc-line: #cbd5e1;
  --spc-ink: #0f172a;
  --spc-ink-soft: #475569;
  --spc-ink-faint: #94a3b8;
  --spc-primary: var(--tf-accent, #6366f1);
  --spc-primary-hover: #4f46e5;
  --spc-green: #15803d;
  --spc-red: #b91c1c;
  --spc-radius: 2px;
}

.spc-main {
  width: 100%;
  color: var(--spc-ink);
}

.spc-wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Controls bar */
.spc-controls-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  margin-bottom: 24px;
  padding: 16px;
  background: var(--spc-surface);
  border: 1px solid var(--spc-line);
  border-radius: var(--spc-radius);
}

.spc-control-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.spc-control-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--spc-ink-soft);
}

/* 2-column Grid */
.spc-editor-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

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

/* Panels */
.spc-panel {
  background: var(--spc-card);
  border: 1px solid var(--spc-line);
  border-radius: var(--spc-radius);
  padding: 20px;
}

.spc-form-panel,
.spc-preview-panel {
  position: relative;
}

.spc-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.spc-panel-title {
  font-size: 1.0625rem;
  font-weight: 700;
  margin: 0;
  color: var(--spc-ink);
}

.spc-subhead {
  font-size: 0.8125rem;
  font-weight: 700;
  margin: 16px 0 8px 0;
  color: var(--spc-ink);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.spc-upload-btn {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--spc-surface);
  border: 1px solid var(--spc-line);
  border-radius: var(--spc-radius);
  color: var(--spc-ink);
  cursor: pointer;
}

.spc-upload-btn:hover {
  background: var(--spc-card);
  border-color: var(--spc-ink);
}

.spc-ad {
  overflow: hidden;
  min-height: 280px;
}

/* Textarea & Inputs */
.spc-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.spc-textarea {
  width: 100%;
  padding: 12px;
  font-family: var(--tf-font-mono, ui-monospace, monospace);
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--spc-ink);
  background: var(--spc-card);
  border: 1px solid var(--spc-line);
  border-radius: var(--spc-radius);
  resize: vertical;
  box-sizing: border-box;
}

.spc-textarea:focus,
.spc-input:focus,
.spc-select:focus {
  outline: 2px solid var(--spc-primary);
  border-color: var(--spc-primary);
}

.spc-input,
.spc-select {
  padding: 8px 12px;
  font-size: 0.875rem;
  color: var(--spc-ink);
  background: var(--spc-card);
  border: 1px solid var(--spc-line);
  border-radius: var(--spc-radius);
  font-family: inherit;
  box-sizing: border-box;
}

.spc-status-bar {
  font-size: 0.75rem;
  font-weight: 600;
  margin-top: 4px;
}

.spc-status-valid {
  color: var(--spc-green);
}

.spc-status-error {
  color: var(--spc-red);
}

/* Checkerboard Preview Box */
.spc-preview-box {
  width: 100%;
  height: 180px;
  border: 1px solid var(--spc-line);
  border-radius: var(--spc-radius);
  background-image: linear-gradient(45deg, #e2e8f0 25%, transparent 25%),
                    linear-gradient(-45deg, #e2e8f0 25%, transparent 25%),
                    linear-gradient(45deg, transparent 75%, #e2e8f0 75%),
                    linear-gradient(-45deg, transparent 75%, #e2e8f0 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 12px;
  box-sizing: border-box;
}

.spc-canvas-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 100%;
  max-height: 100%;
}

.spc-canvas-wrap svg {
  max-width: 150px;
  max-height: 150px;
}

/* Tabs */
.spc-tabs {
  display: flex;
  gap: 6px;
}

.spc-tab {
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  background: none;
  border: 1px solid transparent;
  border-radius: var(--spc-radius);
  color: var(--spc-ink-soft);
  cursor: pointer;
}

.spc-tab.is-active {
  background: var(--spc-surface);
  border-color: var(--spc-line);
  color: var(--spc-ink);
}

/* Output Code Wrap */
.spc-code-wrap {
  background: var(--spc-surface);
  border: 1px solid var(--spc-line);
  border-radius: var(--spc-radius);
  height: 380px;
  overflow-y: auto;
}

.spc-code-pre {
  margin: 0;
  padding: 14px;
  font-family: var(--tf-font-mono, ui-monospace, monospace);
  font-size: 0.8125rem;
  line-height: 1.55;
  color: var(--spc-ink);
  white-space: pre-wrap;
  word-break: break-all;
}

/* Metrics Row */
.spc-metrics-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--spc-line);
}

.spc-metric-item {
  display: flex;
  flex-direction: column;
}

.spc-metric-label {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--spc-ink-soft);
}

.spc-metric-val {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--spc-ink);
  margin-top: 2px;
}

/* Buttons */
.spc-action-bar {
  margin-top: 16px;
}

.spc-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 18px;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--spc-radius);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color 0.15s ease;
  background: var(--spc-primary);
  color: #ffffff;
}

.spc-btn-primary {
  background: var(--spc-primary);
  color: #ffffff;
}

.spc-btn-primary:hover {
  background: var(--spc-primary-hover);
}

.spc-btn-sm {
  padding: 6px 14px;
  font-size: 0.8125rem;
}

.spc-btn-secondary {
  background: var(--spc-surface);
  color: var(--spc-ink);
  border-color: var(--spc-line);
}

.spc-btn-secondary:hover {
  background: var(--spc-card);
  border-color: var(--spc-ink);
}

@media (max-width: 640px) {
  .spc-controls-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .spc-control-group {
    justify-content: space-between;
  }
  .spc-code-wrap {
    height: 280px;
  }
  .spc-metrics-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }
}

/* tf:dark-palette — generated by migrate_chrome.py */
/* Neutrals inherit the shared chrome tokens so all tools share one
   ground; brand hues are kept and lightened, never inverted. */
[data-theme="dark"] {
  --spc-bg: var(--tf-surface);
  --spc-surface: var(--tf-surface);
  --spc-card: var(--tf-surface);
  --spc-border: var(--tf-surface);
  --spc-line: #98abc3;
  --spc-ink: var(--tf-ink);
  --spc-ink-soft: var(--tf-ink-soft);
  --spc-ink-faint: var(--tf-ink-faint);
  --spc-primary-hover: #8681da;
  --spc-green: #5ed089;
  --spc-red: #da8181;
}