.dupcss-root {
    --dupcss-primary: #10b981;
    --dupcss-primary-dark: #059669;
    --dupcss-card-bg: #fff;
    --dupcss-bg: #f8fafc;
    --dupcss-text: #0f172a;
    --dupcss-text-muted: #64748b;
    --dupcss-border: #e2e8f0;
    --dupcss-output-bg: rgba(16, 185, 129, 0.04);
    --dupcss-saving-color: #f59e0b;

    max-width: 1000px;
    margin: 2rem auto;
    color: var(--dupcss-text);
  }

  .theme-dark .dupcss-root {
    --dupcss-card-bg: #1e293b;
    --dupcss-bg: #0f172a;
    --dupcss-text: #f1f5f9;
    --dupcss-text-muted: #94a3b8;
    --dupcss-border: #334155;
    --dupcss-output-bg: rgba(16, 185, 129, 0.08);
  }

  .dupcss-card {
    background: var(--dupcss-card-bg);
    border: 1px solid var(--dupcss-border);
    border-radius: 1.25rem;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
  }

  .dupcss-stats {
    display: none;
    gap: 0;
    background: var(--dupcss-bg);
    border: 1px solid var(--dupcss-border);
    border-radius: 0.875rem;
    overflow: hidden;
  }

  .dupcss-stats-visible {
    display: flex;
  }

  .dupcss-stat-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.875rem 1rem;
    gap: 0.25rem;
  }

  .dupcss-stat-sep {
    width: 1px;
    background: var(--dupcss-border);
    align-self: stretch;
  }

  .dupcss-stat-value {
    font-size: 1.375rem;
    font-weight: 800;
    color: var(--dupcss-primary);
    line-height: 1;
  }

  .dupcss-stat-value-saving {
    color: var(--dupcss-saving-color);
  }

  .dupcss-stat-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    font-weight: 600;
    color: var(--dupcss-text-muted);
    letter-spacing: 0.06em;
  }

  .dupcss-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }

  @media (max-width: 768px) {
    .dupcss-grid {
      grid-template-columns: 1fr;
    }
  }

  .dupcss-field {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .dupcss-field-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .dupcss-field-label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--dupcss-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
  }

  .dupcss-copy-btn {
    background: transparent;
    border: 1px solid var(--dupcss-border);
    color: var(--dupcss-text-muted);
    padding: 0.2rem 0.6rem;
    border-radius: 0.4rem;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
  }

  .dupcss-copy-btn:hover {
    background: var(--dupcss-bg);
    color: var(--dupcss-primary);
    border-color: var(--dupcss-primary);
  }

  .dupcss-textarea {
    width: 100%;
    height: 320px;
    padding: 1rem 1.25rem;
    font-size: 0.875rem;
    color: var(--dupcss-text);
    background: var(--dupcss-bg);
    border: 1px solid var(--dupcss-border);
    border-radius: 0.875rem;
    resize: vertical;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
    white-space: pre;
    overflow: auto;
    line-height: 1.6;
  }

  .dupcss-textarea:focus {
    border-color: var(--dupcss-primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.12);
  }

  .dupcss-textarea-output {
    border-color: var(--dupcss-primary);
    background: var(--dupcss-output-bg);
  }

  .dupcss-textarea-output:focus {
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.12);
  }

  .dupcss-actions {
    display: flex;
    justify-content: center;
  }

  .dupcss-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--dupcss-primary);
    color: #fff;
    font-weight: 700;
    font-size: 0.95rem;
    padding: 0.875rem 2rem;
    border-radius: 0.875rem;
    border: none;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
  }

  .dupcss-btn:hover {
    background: var(--dupcss-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(16, 185, 129, 0.4);
  }

  .dupcss-btn-icon {
    width: 18px;
    height: 18px;
  }