.spec-root {
    --spec-primary: #8b5cf6;
    --spec-primary-dark: #7c3aed;
    --spec-success: #10b981;
    --spec-card-bg: #fff;
    --spec-bg: #f8fafc;
    --spec-text: #0f172a;
    --spec-text-muted: #64748b;
    --spec-border: #e2e8f0;

    max-width: 900px;
    margin: 2rem auto;
    color: var(--spec-text);
  }

  .theme-dark .spec-root {
    --spec-card-bg: #1e293b;
    --spec-bg: #0f172a;
    --spec-text: #f1f5f9;
    --spec-text-muted: #94a3b8;
    --spec-border: #334155;
  }

  .spec-card {
    background: var(--spec-card-bg);
    border: 1px solid var(--spec-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;
  }

  .spec-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    position: relative;
  }

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

  .spec-vs {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--spec-primary);
    color: #fff;
    font-weight: 800;
    width: 2.75rem;
    height: 2.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 3px solid var(--spec-card-bg);
    z-index: 10;
    font-size: 0.85rem;
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.4);
  }

  @media (max-width: 768px) {
    .spec-vs {
      display: none;
    }
  }

  .spec-block {
    background: var(--spec-bg);
    border: 2px solid var(--spec-border);
    border-radius: 1rem;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    position: relative;
    overflow: hidden;
    transition: border-color 0.25s, box-shadow 0.25s, padding-top 0.25s;
  }

  .spec-winner-banner {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    background: var(--spec-success);
    color: #fff;
    text-align: center;
    font-weight: 700;
    padding: 0.3rem;
    font-size: 0.8rem;
    transform: translateY(-100%);
    transition: transform 0.25s;
  }

  .spec-field {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
  }

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

  .spec-input {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    color: var(--spec-text);
    background: var(--spec-card-bg);
    border: 1px solid var(--spec-border);
    border-radius: 0.75rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
  }

  .spec-input:focus {
    border-color: var(--spec-primary);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
  }

  .spec-counters {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.625rem;
  }

  .spec-counter {
    background: var(--spec-card-bg);
    border: 1px solid var(--spec-border);
    border-radius: 0.75rem;
    padding: 0.875rem 0.5rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.375rem;
  }

  .spec-counter-ids {
    border-bottom: 3px solid #ef4444;
  }

  .spec-counter-cls {
    border-bottom: 3px solid #3b82f6;
  }

  .spec-counter-els {
    border-bottom: 3px solid #10b981;
  }

  .spec-counter-value {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1;
    font-variant-numeric: tabular-nums;
  }

  .spec-counter-ids .spec-counter-value {
    color: #ef4444;
  }

  .spec-counter-cls .spec-counter-value {
    color: #3b82f6;
  }

  .spec-counter-els .spec-counter-value {
    color: #10b981;
  }

  .spec-counter-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 700;
    color: var(--spec-text-muted);
  }

  .spec-tie-msg {
    text-align: center;
    padding: 0.875rem 1.25rem;
    background: var(--spec-bg);
    border: 1px solid var(--spec-border);
    border-radius: 0.875rem;
    color: var(--spec-text);
    font-weight: 600;
    font-size: 0.9rem;
    opacity: 0;
    transform: translateY(6px);
    transition: opacity 0.25s, transform 0.25s;
  }