.speed-converter {
    --n-bg: #fff;
    --n-bg-muted: #f1f5f9;
    --n-text: #0f172a;
    --n-text-muted: #475569;
    --n-text-dim: #64748b;
    --n-border: #e2e8f0;
    --n-shadow: rgba(0, 0, 0, 0.05);
    --n-primary: #3b82f6;
    --n-primary-on: #fff;
    --n-accent: #6366f1;
    --n-cyan: #0891b2;
    --n-success: #10b981;
    --n-warning: #f59e0b;
    --n-error: #f43f5e;

    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 2rem;
  }

  .theme-dark .speed-converter {
    --n-bg: #0f172a;
    --n-bg-muted: #1e293b;
    --n-text: #f8fafc;
    --n-text-muted: #94a3b8;
    --n-text-dim: #64748b;
    --n-border: #334155;
    --n-shadow: rgba(0, 0, 0, 0.3);
    --n-primary: #60a5fa;
    --n-primary-on: #fff;
    --n-accent: #818cf8;
    --n-cyan: #22d3ee;
    --n-success: #34d399;
    --n-warning: #fbbf24;
    --n-error: #fb7185;
  }

  .sc-input-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    background: var(--n-bg);
    border: 1px solid var(--n-border);
    border-radius: 1.5rem;
    padding: 2rem;
  }

  .sc-input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .sc-input-group label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--n-text-muted);
    text-transform: uppercase;
  }

  .sc-input-wrapper {
    background: var(--n-bg-muted);
    border: 2px solid var(--n-border);
    border-radius: 0.8rem;
    padding: 0.8rem 1rem;
    transition: border-color 0.2s;
  }

  .sc-input-wrapper:focus-within {
    border-color: var(--n-cyan);
  }

  .sc-input-wrapper input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--n-text);
    font-size: 1.5rem;
    font-weight: 800;
    width: 100%;
  }

  .sc-input-wrapper input::-webkit-outer-spin-button,
  .sc-input-wrapper input::-webkit-inner-spin-button {
    appearance: none;
  }

  .sc-beaufort-summary {
    background: var(--n-primary);
    color: var(--n-primary-on);
    border-radius: 1.5rem;
    padding: 2rem;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 1rem 2rem;
    align-items: center;
  }

  .sc-force-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--n-primary-on);
    flex-shrink: 0;
  }

  .sc-force-text-box {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
  }

  .sc-force-name {
    margin: 0;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--n-primary-on);
  }

  .sc-force-detail {
    margin: 0;
    opacity: 0.8;
    font-size: 0.9rem;
    color: var(--n-primary-on);
  }

  .sc-sea-state-box {
    grid-column: 1 / -1;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 1rem;
    padding: 1rem 1.5rem;
  }

  .sc-sea-text .label {
    font-size: 0.7rem;
    text-transform: uppercase;
    opacity: 0.7;
    color: var(--n-primary-on);
    font-weight: 700;
  }

  .sc-sea-text p {
    margin: 0.2rem 0 0;
    font-weight: 600;
    color: var(--n-primary-on);
  }

  .sc-table-container {
    background: var(--n-bg);
    border: 1px solid var(--n-border);
    border-radius: 1.5rem;
    overflow: hidden;
  }

  .sc-table-container h3 {
    padding: 1.5rem;
    margin: 0;
    font-size: 1rem;
    color: var(--n-text-muted);
    border-bottom: 1px solid var(--n-border);
    font-weight: 700;
  }

  .sc-scroll-area {
    overflow-x: auto;
  }

  .sc-beaufort-table {
    width: 100%;
    border-collapse: collapse;
  }

  .sc-beaufort-table th {
    text-align: left;
    padding: 0.8rem 1rem;
    font-size: 0.75rem;
    color: var(--n-text-muted);
    text-transform: uppercase;
    border-bottom: 2px solid var(--n-border);
  }

  .sc-beaufort-table td {
    padding: 0.8rem 1rem;
    font-size: 0.9rem;
    color: var(--n-text-muted);
    border-bottom: 1px solid var(--n-border);
  }

  .sc-clickable-row {
    cursor: pointer;
    transition: background 0.15s;
  }

  .sc-clickable-row:hover {
    background: var(--n-bg-muted);
  }

  .sc-clickable-row.active {
    background: var(--n-primary);
  }

  .sc-clickable-row.active td {
    color: var(--n-primary-on);
  }

  .sc-force-tag {
    background: var(--n-bg-muted);
    padding: 0.2rem 0.5rem;
    border-radius: 0.4rem;
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--n-text);
  }

  .sc-clickable-row.active .sc-force-tag {
    background: rgba(255, 255, 255, 0.2);
    color: var(--n-primary-on);
  }

  @media (max-width: 640px) {
    .sc-beaufort-summary {
      grid-template-columns: 1fr;
    }

    .sc-force-circle {
      width: 60px;
      height: 60px;
      font-size: 2rem;
    }
  }