.sail-area-calculator {
    --sa-primary: #003b73;
    --sa-primary-light: #0055a4;
    --sa-secondary: #ef4135;
    --sa-radius: 16px;
    --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;

    padding: 1rem;
    max-width: 1200px;
    margin: 0 auto;
  }

  .theme-dark .sail-area-calculator {
    --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;
  }

  .sa-calculator-wrapper {
    background: var(--n-bg);
    border: 1px solid var(--n-border);
    border-radius: var(--sa-radius);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
  }

  .sa-main-controls {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }

  .sa-section-group h3 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--n-text-muted);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.8;
    border-bottom: 1px solid var(--n-border);
    padding-bottom: 0.4rem;
  }

  .sa-compact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .sa-input-row {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
  }

  .sa-input-row label {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--n-text-muted);
  }

  .sa-elegant-input {
    background: var(--n-bg-muted);
    border: 1.5px solid var(--n-border);
    border-radius: 10px;
    padding: 0.7rem 0.9rem;
    font-size: 0.95rem;
    color: var(--n-text);
    font-weight: 600;
    width: 100%;
  }

  .sa-elegant-input:focus {
    border-color: var(--sa-primary-light);
    outline: none;
  }

  .sa-input-with-unit {
    position: relative;
    display: flex;
    align-items: center;
  }

  .sa-unit-tag {
    position: absolute;
    right: 10px;
    font-size: 0.65rem;
    font-weight: 900;
    color: var(--n-text-muted);
    background: var(--n-bg);
    border: 1px solid var(--n-border);
    padding: 2px 6px;
    border-radius: 4px;
  }

  .sa-unit-tag select {
    color: var(--n-text-muted);
  }

  .sa-sidebar-results {
    background: var(--n-bg-muted);
    padding: 1.5rem;
    border-radius: var(--sa-radius);
    border: 1px solid var(--n-border);
    text-align: center;
  }

  .sad-value-large {
    font-size: 3.5rem;
    font-weight: 950;
    letter-spacing: -0.04em;
    color: var(--sa-primary);
    line-height: 1;
  }

  .theme-dark .sail-area-calculator .sad-value-large {
    color: var(--n-accent);
  }

  .sad-label {
    font-size: 0.75rem;
    font-weight: 850;
    color: var(--n-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.15em;
  }

  .sa-gauge-track {
    height: 4px;
    background: var(--n-border);
    border-radius: 2px;
    margin: 1.5rem 0;
    position: relative;
  }

  .sa-gauge-indicator {
    position: absolute;
    top: 50%;
    width: 14px;
    height: 14px;
    background: var(--sa-secondary);
    border: 3px solid var(--n-bg-muted);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
    transition: left 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
  }

  .sa-verdict-box {
    background: var(--n-bg);
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--n-border);
  }

  .sa-verdict-box h4 {
    font-size: 0.95rem;
    margin-bottom: 0.4rem;
    color: var(--n-text);
  }

  .sa-verdict-box p {
    font-size: 0.8rem;
    line-height: 1.5;
    color: var(--n-text-muted);
  }

  .sa-stats-summary {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px dashed var(--n-border);
  }

  .sa-stat-item span {
    font-size: 0.75rem;
    color: var(--n-text-muted);
    display: block;
  }

  .sa-stat-item span:last-child {
    font-size: 1.2rem;
    font-weight: 900;
    color: var(--n-text);
  }

  .sa-export-btn-premium {
    width: 100%;
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--sa-primary);
    color: var(--n-primary-on);
    border: none;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
  }

  .sa-slider-box {
    background: var(--n-bg-muted);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--n-border);
  }

  .sa-slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
  }

  .sa-slider-header label {
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--n-text);
  }

  .sa-percentage-badge {
    background: var(--sa-primary);
    color: var(--n-primary-on);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 900;
  }

  .sa-slider-wrapper {
    padding: 0 5px;
  }

  .sa-modern-slider {
    appearance: none;
    width: 100%;
    height: 6px;
    background: var(--n-border);
    border-radius: 10px;
    outline: none;
    margin: 1rem 0;
  }

  .sa-modern-slider::-webkit-slider-thumb {
    appearance: none;
    width: 24px;
    height: 24px;
    background: var(--sa-primary);
    border: 4px solid var(--n-bg-muted);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(0, 59, 115, 0.2);
    transition: transform 0.2s;
  }

  .sa-modern-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
  }

  .sa-modern-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background: var(--sa-primary);
    border: 4px solid var(--n-bg-muted);
    border-radius: 50%;
    cursor: pointer;
  }

  .sa-modern-slider::-moz-range-track {
    height: 6px;
    background: var(--n-border);
    border-radius: 10px;
  }

  .sa-slider-ticks {
    display: flex;
    justify-content: space-between;
    margin-top: 0.5rem;
  }

  .sa-slider-ticks span {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--n-text-muted);
  }

  @media (min-width: 1024px) {
    .sail-area-calculator {
      padding: 2rem;
    }

    .sa-calculator-wrapper {
      display: grid;
      grid-template-columns: 1fr 400px;
      gap: 3rem;
      padding: 2.5rem;
    }

    .sa-compact-grid {
      grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    }

    .sa-main-controls {
      gap: 2.5rem;
    }

    .sa-sidebar-results {
      position: sticky;
      top: 2rem;
      padding: 2.5rem;
    }

    .sad-value-large {
      font-size: 5.5rem;
    }
  }