.water-calculator {
    --water-primary: #321d19;
    --water-primary-light: #5d4037;
    --water-secondary: #d4a373;
    --water-accent: #e67e22;
    --water-bg-main: rgba(255, 252, 248, 0.95);
    --water-border: #e7e0d8;
    --water-text: #2d1b17;
    --water-shadow: 0 10px 30px -10px rgba(78, 52, 46, 0.15);

    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
  }

  .water-calc-container {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 2rem;
    align-items: start;
  }

  .water-config-panel {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }

  .water-section-card {
    background: var(--water-bg-main);
    border: 1px solid var(--water-border);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--water-shadow);
  }

  .water-section-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--water-secondary);
  }

  .water-section-header h3 {
    font-size: 1.1rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--water-primary);
    margin: 0;
  }

  .water-input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
  }

  .water-field {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .water-field label {
    font-size: 0.75rem;
    font-weight: 800;
    color: var(--water-primary-light);
    text-transform: uppercase;
    letter-spacing: 0.02em;
  }

  .water-field-half {
    max-width: calc(50% - 0.75rem);
  }

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

  .water-input-wrapper input {
    width: 100%;
    padding: 1rem 1.25rem;
    padding-right: 3.5rem;
    background: white;
    border: 2px solid var(--water-border);
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--water-primary);
    transition: all 0.2s ease;
  }

  .water-input-wrapper input:focus {
    outline: none;
    border-color: var(--water-accent);
    box-shadow: 0 0 0 4px rgba(230, 126, 34, 0.1);
  }

  .water-unit-badge {
    position: absolute;
    right: 1rem;
    font-size: 0.7rem;
    font-weight: 900;
    color: var(--water-secondary);
    pointer-events: none;
  }

  .water-presets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.75rem;
    margin-top: 1rem;
  }

  .water-preset-chip {
    padding: 0.75rem;
    background: white;
    border: 2px solid var(--water-border);
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--water-primary-light);
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
  }

  .water-preset-chip:hover {
    border-color: var(--water-secondary);
    background: #faf7f2;
  }

  .water-preset-chip.active {
    background: var(--water-primary);
    color: white;
    border-color: var(--water-primary);
  }

  .water-ppm-fields {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
  }

  .water-results-sidebar {
    position: sticky;
    top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }

  .water-recipe-display {
    background: var(--water-primary);
    color: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 20px 40px rgba(50, 29, 25, 0.25);
  }

  .water-recipe-header {
    border-color: var(--water-accent);
  }

  .water-recipe-header h3 {
    color: white;
  }

  .water-recipe-icon {
    color: var(--water-secondary);
  }

  .water-profile-sub {
    font-size: 0.75rem;
    color: var(--water-secondary);
    margin-top: -1rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
  }

  .water-recipe-item {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .water-recipe-item:last-of-type {
    border-bottom: none;
    margin-bottom: 1rem;
  }

  .water-recipe-label {
    font-size: 0.85rem;
    font-weight: 500;
    opacity: 0.8;
  }

  .water-recipe-value {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--water-secondary);
  }

  .water-recipe-value small {
    font-size: 0.9rem;
    opacity: 0.7;
  }

  .water-total-row {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 1rem;
    margin: 1rem 0;
    text-align: center;
  }

  .water-total-value {
    color: white;
  }

  .water-copy-btn {
    width: 100%;
    padding: 1.25rem;
    background: var(--water-accent);
    color: white;
    border: none;
    border-radius: 14px;
    font-size: 1rem;
    font-weight: 800;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    transition: all 0.2s;
  }

  .water-copy-btn:hover {
    background: #d35400;
    transform: translateY(-2px);
  }

  .water-safety-status {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }

  .water-status-box {
    background: white;
    border-radius: 16px;
    padding: 1.25rem;
    display: flex;
    gap: 1rem;
    border: 1px solid var(--water-border);
  }

  .water-status-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
  }

  .water-status-info h4 {
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    margin: 0 0 0.25rem;
  }

  .water-status-info p {
    font-size: 0.8rem;
    margin: 0;
    line-height: 1.4;
    color: var(--water-primary-light);
  }

  .water-status-green { border-left: 6px solid #27ae60; }
  .water-status-yellow { border-left: 6px solid #f1c40f; }
  .water-status-orange { border-left: 6px solid var(--water-accent); }

  .water-glossary-section {
    margin-top: 2rem;
  }

  .water-glossary-wrap {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
  }

  .water-glossary-card {
    background: rgba(212, 163, 115, 0.05);
    border: 1px dashed var(--water-secondary);
    border-radius: 16px;
    padding: 1.25rem;
  }

  .water-glossary-card h4 {
    color: var(--water-primary);
    margin: 0 0 0.5rem;
    font-size: 0.95rem;
    font-weight: 800;
  }

  .water-glossary-card p {
    font-size: 0.8rem;
    color: var(--water-primary-light);
    line-height: 1.5;
    margin: 0;
  }

  @media (max-width: 900px) {
    .water-calc-container {
      grid-template-columns: 1fr;
    }

    .water-results-sidebar {
      position: static;
    }

    .water-input-row {
      grid-template-columns: 1fr;
    }
  }

  @media (max-width: 600px) {
    .water-field-half {
      max-width: 100%;
    }
  }

  .water-hidden {
    display: none;
  }

  .theme-dark .water-calculator {
    --water-bg-main: #1a0f0d;
    --water-border: #3d2b27;
    --water-text: #e7e0d8;
  }

  .theme-dark .water-section-card,
  .theme-dark .water-status-box {
    background: #1a0f0d;
    border-color: #3d2b27;
  }

  .theme-dark .water-section-header h3,
  .theme-dark .water-glossary-card h4,
  .theme-dark .water-status-info h4 {
    color: var(--water-secondary);
  }

  .theme-dark .water-field label {
    color: #b5a4a0;
  }

  .theme-dark .water-input-wrapper input {
    background: #120908;
    border-color: #3d2b27;
    color: #eee;
  }

  .theme-dark .water-preset-chip {
    background: #231512;
    border-color: #3d2b27;
    color: #ccc;
  }

  .theme-dark .water-preset-chip:hover {
    background: #2d1b17;
    border-color: var(--water-secondary);
  }

  .theme-dark .water-preset-chip.active {
    background: var(--water-accent);
    border-color: var(--water-accent);
    color: white;
  }

  .theme-dark .water-status-info p,
  .theme-dark .water-glossary-card p {
    color: #b5a4a0;
  }

  .theme-dark .water-glossary-card {
    background: rgba(212, 163, 115, 0.1);
    border-style: solid;
  }

  .theme-dark .water-recipe-display {
    border: 1px solid #4d3b37;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  }