:root {
    --sn-primary: #10b981;
    --sn-primary-dark: #059669;
    --sn-teal: #0d9488;
    --sn-negative: #ef4444;
    --sn-info: #3b82f6;
    --sn-text-dark: #1e293b;
    --sn-text-light: #f8fafc;
    --sn-border-light: #e2e8f0;
    --sn-border-dark: #334155;
    --sn-bg-light: #f8fafc;
    --sn-bg-dark: #0f172a;
  }

  .sn-container {
    max-width: 56rem;
    margin: 2rem auto;
    padding: 0 1rem;
  }

  .sn-main-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    background: white;
    border-radius: 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--sn-border-light);
    overflow: hidden;
  }

  .theme-dark .sn-main-grid {
    background: #1e293b;
    border-color: var(--sn-border-dark);
  }

  .sn-form-card {
    padding: 3rem;
    border-right: 1px solid var(--sn-border-light);
  }

  .theme-dark .sn-form-card {
    border-right-color: var(--sn-border-dark);
  }

  .sn-form-section {
    display: flex;
    flex-direction: column;
    gap: 2rem;
  }

  .sn-input-block {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .sn-full-width {
    grid-column: 1 / -1;
  }

  .sn-label {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--sn-text-dark);
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }

  .theme-dark .sn-label {
    color: var(--sn-text-light);
  }

  .sn-input-wrapper {
    position: relative;
  }

  .sn-currency {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #94a3b8;
    font-size: 1.25rem;
  }

  .sn-input {
    width: 100%;
    padding: 1rem 1rem 1rem 2.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    background: #f1f5f9;
    border: 2px solid transparent;
    border-radius: 0.75rem;
    outline: none;
    transition: border-color 0.2s;
    color: var(--sn-text-dark);
  }

  .theme-dark .sn-input {
    background: #1e293b;
    color: var(--sn-text-light);
  }

  .sn-input:focus {
    border-color: var(--sn-primary);
  }

  .sn-pay-toggle {
    display: flex;
    gap: 0.25rem;
    background: #f1f5f9;
    border-radius: 0.75rem;
    padding: 0.25rem;
  }

  .theme-dark .sn-pay-toggle {
    background: #1e293b;
  }

  .sn-pay-btn {
    flex: 1;
    padding: 0.5rem;
    background: transparent;
    border: none;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 700;
    color: #64748b;
    cursor: pointer;
    transition: all 0.2s;
  }

  .sn-pay-btn.sn-active {
    background: white;
    color: var(--sn-text-dark);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  }

  .theme-dark .sn-pay-btn.sn-active {
    background: #334155;
    color: var(--sn-text-light);
  }

  .sn-secondary-inputs {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--sn-border-light);
  }

  .theme-dark .sn-secondary-inputs {
    border-top-color: var(--sn-border-dark);
  }

  .sn-input-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .sn-label-inline {
    font-size: 0.875rem;
    font-weight: 600;
    color: #475569;
  }

  .theme-dark .sn-label-inline {
    color: #cbd5e1;
  }

  .sn-input-small,
  .sn-select-small {
    width: 5rem;
    padding: 0.5rem;
    background: #f1f5f9;
    border: none;
    border-radius: 0.5rem;
    font-weight: 700;
    outline: none;
    text-align: center;
  }

  .theme-dark .sn-input-small,
  .theme-dark .sn-select-small {
    background: #1e293b;
    color: var(--sn-text-light);
  }

  .sn-input-small:focus,
  .sn-select-small:focus {
    box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
  }

  .sn-calculate-btn {
    padding: 1rem;
    background: linear-gradient(135deg, var(--sn-primary), var(--sn-teal));
    color: white;
    border: none;
    border-radius: 0.75rem;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.2);
  }

  .sn-calculate-btn:hover {
    transform: scale(1.02);
  }

  .sn-calculate-btn:active {
    transform: scale(0.98);
  }

  .sn-results-column {
    padding: 3rem;
    background: var(--sn-bg-light);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }

  .theme-dark .sn-results-column {
    background: var(--sn-bg-dark);
  }

  .sn-result-card {
    border-radius: 1.3rem;
    padding: 2rem;
    color: white;
    box-shadow: 0 10px 25px rgba(16, 185, 129, 0.1);
  }

  .sn-gradient {
    background: linear-gradient(135deg, var(--sn-primary), var(--sn-teal));
  }

  .sn-result-label {
    font-size: 0.875rem;
    font-weight: 600;
    opacity: 0.85;
    margin-bottom: 0.5rem;
  }

  .sn-result-value {
    font-size: 3rem;
    font-weight: 900;
    line-height: 1;
    margin-bottom: 1.5rem;
  }

  .sn-result-footer {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
  }

  .sn-result-value-small {
    font-size: 1.25rem;
    font-weight: 700;
  }

  .sn-result-right {
    text-align: right;
  }

  .sn-breakdown-card {
    background: white;
    border-radius: 1.3rem;
    border: 1px solid var(--sn-border-light);
    padding: 1.5rem;
  }

  .theme-dark .sn-breakdown-card {
    background: #1e293b;
    border-color: var(--sn-border-dark);
  }

  .sn-breakdown-title {
    font-weight: 700;
    color: var(--sn-text-dark);
    margin-bottom: 1rem;
  }

  .theme-dark .sn-breakdown-title {
    color: var(--sn-text-light);
  }

  .sn-breakdown-items {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }

  .sn-breakdown-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .sn-breakdown-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: #64748b;
  }

  .theme-dark .sn-breakdown-label {
    color: #cbd5e1;
  }

  .sn-breakdown-value {
    font-weight: 700;
  }

  .sn-negative {
    color: var(--sn-negative);
  }

  .sn-disclaimer {
    padding-top: 1rem;
    margin-top: 1rem;
    border-top: 1px solid var(--sn-border-light);
    text-align: center;
  }

  .theme-dark .sn-disclaimer {
    border-top-color: var(--sn-border-dark);
  }

  .sn-disclaimer a {
    font-size: 0.75rem;
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.2s;
  }

  .theme-dark .sn-disclaimer a {
    color: #64748b;
  }

  .sn-disclaimer a:hover {
    color: var(--sn-primary);
  }

  @media (max-width: 64rem) {
    .sn-main-grid {
      grid-template-columns: 1fr;
    }

    .sn-form-card {
      border-right: none;
      border-bottom: 1px solid var(--sn-border-light);
    }

    .theme-dark .sn-form-card {
      border-bottom-color: var(--sn-border-dark);
    }
  }

  @media (max-width: 40rem) {
    .sn-container {
      margin: 1rem auto;
    }

    .sn-form-card,
    .sn-results-column {
      padding: 1.5rem;
    }

    .sn-result-value {
      font-size: 2rem;
    }

    .sn-result-value-small {
      font-size: 1rem;
    }
  }