:root {
  --dia-bg: #f8fafc;
  --dia-surface: #ffffff;
  --dia-card: #ffffff;
  --dia-border: #e2e8f0;
  --dia-border-focus: #4f46e5;
  --dia-indigo: #4f46e5;
  --dia-indigo-hover: #4338ca;
  --dia-emerald: #10b981;
  --dia-text: #0f172a;
  --dia-muted: #64748b;
  --dia-radius: 8px;
}

body {
  margin: 0;
  padding: 0;
  line-height: 1.5;
}

.dia-container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
}

.dia-header {
  padding: 40px 0 24px;
  border-bottom: 1px solid var(--dia-border);
  background: #ffffff;
}

.dia-breadcrumbs {
  font-size: 0.875rem;
  color: var(--dia-muted);
  margin-bottom: 12px;
  display: flex;
  gap: 8px;
  align-items: center;
}

.dia-breadcrumbs a {
  color: var(--dia-indigo);
  text-decoration: none;
  font-weight: 600;
}

.dia-breadcrumbs a:hover {
  text-decoration: underline;
}

.dia-title {
  font-size: 2rem;
  font-weight: 800;
  margin: 0 0 8px;
  color: var(--dia-text);
  letter-spacing: -0.025em;
}

.dia-subtitle {
  font-size: 1.0625rem;
  color: var(--dia-muted);
  margin: 0;
}

.dia-main {
  padding: 32px 0 60px;
}

/* Presets */
.dia-presets-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.dia-preset-lbl {
  font-size: 0.8125rem;
  color: var(--dia-muted);
  font-weight: 700;
  text-transform: uppercase;
}

.dia-chip {
  background: #ffffff;
  color: var(--dia-muted);
  border: 1px solid #cbd5e1;
  border-radius: 16px;
  padding: 5px 14px;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.dia-chip:hover {
  border-color: var(--dia-indigo);
  color: var(--dia-indigo);
}

.dia-chip.active {
  background: var(--dia-indigo);
  color: #ffffff;
  border-color: var(--dia-indigo);
}

/* Layout Grid */
.dia-layout-grid {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: 24px;
  margin-bottom: 32px;
}

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

.dia-card {
  background: var(--dia-card);
  border: 1px solid var(--dia-border);
  border-radius: var(--dia-radius);
  padding: 24px;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.04);
}

.dia-editor-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.dia-lbl {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--dia-text);
}

.dia-btn-reset {
  background: transparent;
  border: none;
  color: var(--dia-indigo);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
}

.dia-btn-reset:hover {
  text-decoration: underline;
}

.dia-textarea {
  width: 100%;
  background: #ffffff;
  border: 1.5px solid #cbd5e1;
  color: #0f172a;
  padding: 12px 14px;
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  resize: vertical;
  box-sizing: border-box;
  transition: border-color 0.15s ease;
}

.dia-textarea:focus {
  outline: none;
  border-color: var(--dia-border-focus);
}

.dia-syntax-help {
  margin: 10px 0 16px;
  font-size: 0.75rem;
  color: var(--dia-muted);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.dia-syntax-help code {
  background: #f1f5f9;
  padding: 2px 5px;
  border-radius: 4px;
  color: #334155;
}

.dia-btn-primary {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--dia-indigo);
  color: #ffffff;
  border: none;
  padding: 12px 20px;
  border-radius: 6px;
  font-size: 0.9375rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s ease;
}

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

/* Canvas Preview Top */
.dia-preview-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 10px;
}

.dia-section-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--dia-text);
  margin: 0;
}

.dia-export-actions {
  display: flex;
  gap: 8px;
}

.dia-btn-export {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: #ffffff;
  color: var(--dia-text);
  border: 1px solid #cbd5e1;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
}

.dia-btn-export:hover {
  background: #f1f5f9;
}

.dia-btn-export.primary {
  background: var(--dia-indigo);
  color: #ffffff;
  border-color: var(--dia-indigo);
}

.dia-btn-export.primary:hover {
  background: var(--dia-indigo-hover);
}

/* Stage Box */
.dia-stage-box {
  min-height: 320px;
  background: #ffffff;
  border: 1.5px dashed #cbd5e1;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  overflow: auto;
}

.dia-svg-canvas {
  width: 100%;
  height: 100%;
  min-height: 280px;
}

/* Ad slots */
.dia-ad-container {
  width: 100%;
  margin: 36px 0;
  display: flex;
  justify-content: center;
}

.dia-ad-box {
  width: 100%;
  max-width: 728px;
  min-height: 280px;
  background: #ffffff;
  border: 1px dashed var(--dia-border);
  border-radius: var(--dia-radius);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Content */
.dia-content-section {
  margin-top: 48px;
}

.dia-content-section h2 {
  font-size: 1.5rem;
  color: var(--dia-text);
  margin-bottom: 16px;
}

.dia-features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin: 28px 0;
}

.dia-feature-card {
  background: #ffffff;
  border: 1px solid var(--dia-border);
  border-radius: var(--dia-radius);
  padding: 20px;
}

.dia-feature-card h3 {
  font-size: 1.125rem;
  margin: 0 0 8px;
  color: var(--dia-indigo);
}

.dia-feature-card p {
  font-size: 0.875rem;
  color: var(--dia-muted);
  margin: 0;
}

.dia-footer {
  background: #ffffff;
  border-top: 1px solid var(--dia-border);
  padding: 28px 0;
  text-align: center;
  font-size: 0.875rem;
  color: var(--dia-muted);
}

.dia-footer a {
  color: var(--dia-indigo);
  text-decoration: none;
  font-weight: 600;
}

.dia-consent-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.dia-consent-text {
  font-size: 0.875rem;
  color: #cbd5e1;
  margin: 0;
}

.dia-consent-actions {
  display: flex;
  gap: 8px;
}

.dia-btn-consent-yes {
  background: var(--dia-indigo);
  color: #ffffff;
  border: none;
  padding: 8px 16px;
  border-radius: 6px;
  font-weight: 700;
  cursor: pointer;
}

.dia-btn-consent-no {
  background: transparent;
  color: #94a3b8;
  border: 1px solid #475569;
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
}

/* 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"] {
  --dia-bg: var(--tf-surface);
  --dia-surface: var(--tf-surface);
  --dia-card: var(--tf-surface);
  --dia-border: var(--tf-surface);
  --dia-border-focus: #8681da;
  --dia-indigo: #8681da;
  --dia-indigo-hover: #8781da;
  --dia-emerald: #81dabd;
  --dia-text: var(--tf-ink);
  --dia-muted: var(--tf-ink-faint);
}