.nautical-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;

    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 900px;
    margin: 0 auto;
  }

  .theme-dark .nautical-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;
  }

  .nc-category-tabs {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    background: var(--n-bg);
    border: 1px solid var(--n-border);
    border-radius: 1rem;
    padding: 0.5rem;
  }

  .nc-tab-btn {
    flex: 1;
    min-width: 120px;
    padding: 0.7rem 1.2rem;
    border: none;
    border-radius: 0.7rem;
    background: transparent;
    color: var(--n-text-muted);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
  }

  .nc-tab-btn:hover {
    background: var(--n-bg-muted);
    color: var(--n-text);
  }

  .nc-tab-btn.active {
    background: var(--n-primary);
    color: var(--n-primary-on);
  }

  .nc-tab-panel {
    display: none;
  }

  .nc-tab-panel.active {
    display: block;
  }

  .nc-converter-card {
    background: var(--n-bg);
    border: 1px solid var(--n-border);
    border-radius: 1.5rem;
    padding: 2rem;
    box-shadow: 0 8px 24px var(--n-shadow);
  }

  .nc-input-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1.2rem;
  }

  .nc-input-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
  }

  .nc-input-group label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--n-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }

  .nc-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
  }

  .nc-elegant-input {
    width: 100%;
    background: var(--n-bg);
    color: var(--n-text);
    border: 2px solid var(--n-border);
    border-radius: 0.8rem;
    padding: 0.75rem 2.8rem 0.75rem 1rem;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
  }

  .nc-elegant-input:focus {
    border-color: var(--n-cyan);
  }

  .nc-copy-btn {
    position: absolute;
    right: 0.5rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--n-cyan);
    padding: 0.2rem;
    display: flex;
    align-items: center;
    opacity: 0.5;
    transition: opacity 0.2s;
  }

  .nc-copy-btn:hover {
    opacity: 1;
  }

  .nc-beaufort-card {
    margin-top: 1.5rem;
    background: var(--n-bg);
    border: 1px solid var(--n-border);
    border-radius: 1rem;
    padding: 1.2rem 1.5rem;
    display: none;
    align-items: center;
    gap: 1.2rem;
  }

  .nc-beaufort-card.visible {
    display: flex;
  }

  .nc-beaufort-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--n-primary-on);
    flex-shrink: 0;
  }

  .nc-beaufort-info {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
  }

  .nc-beaufort-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--n-text);
  }

  .nc-beaufort-sea {
    font-size: 0.9rem;
    color: var(--n-text-muted);
  }

  @media (max-width: 600px) {
    .nc-input-grid {
      grid-template-columns: 1fr 1fr;
    }

    .nc-tab-btn {
      font-size: 0.8rem;
      padding: 0.6rem 0.8rem;
    }
  }