/* ========================================
   CSS Custom Properties (Variables)
   ======================================== */
   :root {
    /* Color System */
    --color-primary: #2271b1;
    --color-primary-hover: #135e96;
    --color-primary-light: #f0f6fc;
    --color-secondary: #4b0082;
    --color-secondary-light: #8b5cf6;
    --color-accent: #a066ff;
    --color-accent-light: #d5b8ff;
    --color-accent-lightest: #f3e5ff;
    --color-purple-light: #e0ccff;
    
    /* Neutral Colors */
    --color-white: #ffffff;
    --color-black: #000000;
    --color-text-primary: #1d2327;
    --color-text-secondary: #666666;
    --color-text-muted: #999999;
    --color-text-light: #333333;
    
    /* Status Colors */
    --color-success: #155724;
    --color-success-bg: #d4edda;
    --color-success-border: #c3e6cb;
    --color-warning: #856404;
    --color-warning-bg: #fff3cd;
    --color-warning-border: #ffeeba;
    --color-error: #dc3232;
    
    /* Background Colors */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f8f9fa;
    --color-bg-tertiary: #f0f0f0;
    --color-bg-overlay: rgba(0, 0, 0, 0.5);
    
    /* Border Colors */
    --color-border: #dddddd;
    --color-border-light: #f0f0f0;
    --color-border-medium: #e0e0e0;
    --color-border-dark: #cccccc;
    
    /* Spacing System */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 12px;
    --space-lg: 15px;
    --space-xl: 20px;
    --space-2xl: 24px;
    --space-3xl: 30px;
    --space-4xl: 40px;
    
    /* Typography */
    --font-size-xs: 11px;
    --font-size-sm: 13px;
    --font-size-base: 14px;
    --font-size-md: 15px;
    --font-size-lg: 16px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    --line-height-tight: 1;
    --line-height-base: 1.4;
    
    /* Sizing */
    --size-input-height: 32px;
    --size-button-height: 36px;
    --size-icon: 16px;
    --size-spinner: 16px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 2px 10px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-all: all var(--transition-fast);
    
    /* Z-Index Scale */
    --z-overlay: 999999;
    
    /* Layout */
    --container-max-width: 900px;
    --grid-gap: var(--space-xl);
    --grid-gap-mobile: var(--space-lg);
  }
  
  /* ========================================
     Base Component Styles
     ======================================== */
  
  /* Calculator Container */
  .bpo-calculator-container {
    position: relative;
    display: inline-block;
  }
  
  /* Primary Button */
  .bpo-calculator-button {
    background-color: var(--color-secondary-light);
    color: var(--color-white);
    padding: var(--space-md) var(--space-2xl);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    transition: background-color var(--transition-base);
    
    &:hover {
      background-color: var(--color-secondary);
    }
  }
  
  /* Overlay and Popup */
  .bpo-calculator-overlay {
    position: fixed;
    inset: 0;
    background-color: var(--color-bg-overlay);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: var(--z-overlay);
  }
  
  .bpo-calculator-popup {
    background-color: var(--color-bg-primary);
    padding: var(--space-3xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    position: relative;
    inline-size: 90%;
    max-inline-size: var(--container-max-width);
    max-block-size: 90vh;
    overflow-y: auto;
    transition: var(--transition-all);
  }
  
  /* Close Button */
  .bpo-calculator-close {
    position: absolute;
    inset-block-start: var(--space-lg);
    inset-inline-end: var(--space-lg);
    background: none;
    border: none;
    font-size: var(--space-2xl);
    cursor: pointer;
    color: var(--color-text-secondary);
    padding: 0;
    line-height: var(--line-height-tight);
    
    &:hover {
      color: var(--color-black);
    }
  }
  
  /* Content Area */
  .bpo-calculator-content {
    margin-inline: auto;
    
    h2 {
      margin: 0 0 var(--space-xl) 0;
      color: var(--color-secondary-light);
      font-size: var(--font-size-2xl);
      text-align: center;
    }
  }
  
  /* ========================================
     Form Styles
     ======================================== */
  
  .form-intro {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    margin-block-end: var(--space-xl);
  }
  
  .form-section {
    margin-block-end: var(--space-lg);
    
    h3 {
      color: var(--color-text-primary);
      font-size: var(--font-size-md);
      margin: 0 0 var(--space-md) 0;
      padding-block-end: var(--space-sm);
      border-block-end: 1px solid var(--color-border-light);
    }
  }
  
  /* Grid Layout */
  .form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--grid-gap);
    margin-block-end: var(--space-xl);
    inline-size: 100%;
  }
  
  /* Form Groups */
  .form-group {
    margin-block-end: 0;
    inline-size: 100%;
    box-sizing: border-box;
    
    &.full-width {
      grid-column: 1 / -1;
    }
    
    &.half-width {
      grid-column: span 1;
      inline-size: 100%;
    }
    
    &.small-width {
      grid-column: span 1;
      max-inline-size: 200px;
      inline-size: 100%;
    }
    
    label {
      display: block;
      margin-block-end: var(--space-xs);
      color: var(--color-text-primary);
      font-weight: var(--font-weight-medium);
      font-size: var(--font-size-sm);
    }
  }
  
  .label-text {
    display: inline-block;
    margin-inline-end: 3px;
  }
  
  .required {
    color: var(--color-error);
    font-size: var(--font-size-sm);
  }
  
  /* Input Styles */
  .form-group input,
  .form-group select {
    inline-size: 100%;
    padding: 6px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    transition: var(--transition-all);
    background-color: var(--color-bg-primary);
    block-size: var(--size-input-height);
    box-sizing: border-box;
    
    &:focus {
      border-color: var(--color-primary);
      outline: none;
      box-shadow: 0 0 0 1px var(--color-primary);
    }
    
    &::placeholder {
      color: var(--color-text-muted);
    }
  }
  
  /* Select Dropdown */
  .form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right var(--space-sm) center;
    background-size: 14px;
    padding-inline-end: var(--space-3xl);
  }
  
  /* Number Input Component */
  .number-input-wrapper {
    display: flex;
    align-items: center;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    block-size: var(--size-input-height);
    inline-size: 100%;
    box-sizing: border-box;
    
    input {
      flex: 1;
      border: none;
      text-align: center;
      padding: 6px;
      font-size: var(--font-size-base);
      -moz-appearance: textfield;
      block-size: 100%;
      inline-size: 100%;
      box-sizing: border-box;
      
      &::-webkit-outer-spin-button,
      &::-webkit-inner-spin-button {
        -webkit-appearance: none;
        margin: 0;
      }
    }
    
    button {
      inline-size: 28px;
      block-size: 100%;
      border: none;
      background: var(--color-bg-secondary);
      color: var(--color-primary);
      font-size: var(--font-size-base);
      cursor: pointer;
      transition: background-color var(--transition-fast);
      padding: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      
      &:hover {
        background: var(--color-border-light);
      }
      
      &:active {
        background: var(--color-border-medium);
      }
    }
  }
  
  .field-help {
    display: block;
    margin-block-start: var(--space-xs);
    color: var(--color-text-secondary);
    font-size: var(--font-size-xs);
  }
  
  /* ========================================
     Form Actions & Buttons
     ======================================== */
  
  .form-actions {
    margin-block-start: var(--space-xl);
    text-align: center;
  }
  
  .bpo-calculator-submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    background-color: var(--color-secondary-light);
    color: var(--color-white);
    padding: var(--space-md) var(--space-2xl);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    transition: var(--transition-all);
    min-inline-size: 180px;
    
    &:hover {
      background-color: var(--color-secondary);
      transform: translateY(-1px);
    }
    
    &:active {
      transform: translateY(0);
    }
  }
  
  .button-icon {
    font-size: var(--size-icon);
    transition: transform var(--transition-fast);
  }
  
  /* ========================================
     Error States
     ======================================== */
  
  .form-group.error {
    input,
    select,
    .number-input-wrapper {
      border-color: var(--color-error);
    }
    
    .error-message {
      color: var(--color-error);
      font-size: var(--font-size-xs);
      margin-block-start: var(--space-xs);
    }
  }
  
  /* ========================================
     Loading States
     ======================================== */
  
  .bpo-calculator-form.loading {
    .bpo-calculator-submit {
      position: relative;
      padding-inline-start: var(--space-4xl);
      
      &::after {
        content: '';
        position: absolute;
        inset-inline-start: 50%;
        inset-block-start: 50%;
        transform: translate(-50%, -50%);
        inline-size: var(--size-spinner);
        block-size: var(--size-spinner);
        border: 2px solid var(--color-white);
        border-block-start-color: transparent;
        border-radius: 50%;
        animation: bpo-calculator-spin 0.8s linear infinite;
      }
    }
    
    .button-text,
    .button-icon {
      visibility: hidden;
    }
  }
  
  @keyframes bpo-calculator-spin {
    to {
      transform: translate(-50%, -50%) rotate(360deg);
    }
  }
  
  /* ========================================
     Email Status Messages
     ======================================== */
  
  .email-status {
    margin: var(--space-xl) 0;
    padding: var(--space-lg);
    border-radius: var(--radius-sm);
    text-align: center;
    font-size: var(--font-size-lg);
    line-height: var(--line-height-base);
    
    &.success {
      background-color: var(--color-success-bg);
      color: var(--color-success);
      border: 1px solid var(--color-success-border);
    }
    
    &.warning {
      background-color: var(--color-warning-bg);
      color: var(--color-warning);
      border: 1px solid var(--color-warning-border);
    }
    
    a {
      color: inherit;
      text-decoration: underline;
      
      &:hover {
        text-decoration: none;
      }
    }
  }
  
  /* ========================================
     View Transitions
     ======================================== */
  
  .bpo-calculator-view {
    transition: opacity var(--transition-base);
    
    &.fade-out {
      opacity: 0;
      pointer-events: none;
    }
  }
  
  .bpo-calculator-result {
    display: none;
  }
  
  #calculator-results-view {
    
  }
  
  /* ========================================
     Results Layout
     ======================================== */
  
  .results-container {
    display: flex;
    gap: var(--space-xl);
    flex-wrap: wrap;
  }
  
  .results-columns {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xl);
    inline-size: 100%;
  }
  
  .results-column {
    flex: 1;
    min-inline-size: 300px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-sm);
    overflow: hidden;
    
    h3 {
      background: var(--color-secondary-light);
      color: var(--color-white);
      padding: 25px;
      margin: 0;
      font-weight: var(--font-weight-extrabold);
    }
  }
  
  /* BPO Costs Column */
  .bpo-costs {
    background-color: var(--color-purple-light);
    border-color: var(--color-accent);
    
    h3 {
      background: var(--color-secondary);
    }
    
    .total-cost {
      border-block-start-color: var(--color-accent);
    }
  }
  
  /* Employee Costs Column */
  .employee-costs {
    background-color: var(--color-bg-tertiary);
    border-color: #555;
    
    h3 {
      background: var(--color-text-light);
      color: var(--color-text-light);
    }
    
    .total-cost {
      border-block-start-color: #555;
    }
  }
  
  /* Cost Items */
  .items-container {
    padding: var(--space-xl) 0;
  }
  
  .cost-item,
  .total-cost {
    display: flex;
    justify-content: space-between;
    padding: 10px 25px;
    font-size: var(--font-size-base);
  }
  
  .total-cost {
    font-weight: var(--font-weight-bold);
    border-block-start: 1px solid var(--color-border-dark);
    padding: 25px;
    border-block-end: none;
  }
  
  .bold {
    font-weight: var(--font-weight-extrabold);
  }
  
  .cost-label,
  .savings-label {
    flex-basis: 60%;
    
  }
  
  .cost-value,
  .savings-value {
    flex-basis: 40%;
    font-weight: var(--font-weight-normal);
  }
  
  .total-cost .cost-value {
    font-weight: var(--font-weight-bold);
  }
  
  /* ========================================
     Savings Summary
     ======================================== */
  
  .savings-summary {
    inline-size: 100%;
    margin-block-start: var(--space-xl);
    padding: var(--space-xl);
    background-color: var(--color-accent-lightest);
    border: 1px solid var(--color-accent-light);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: var(--space-xl);
    text-align: center;
  }
  
  .savings-item {
    
    min-inline-size: 200px;
    
    .savings-label {
      display: block;
      font-size: 1.2em;
      margin-block-end: 10px;
      font-weight: var(--font-weight-bold);
      color: var(--color-text-primary);
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    
    .savings-value {
      display: block;
      font-size: 2em;
      font-weight: var(--font-weight-extrabold);
      color: var(--color-secondary-light);
    }
  }
  
  /* ========================================
     Results Actions
     ======================================== */
  
  .results-actions {
    margin-block-start: 25px;
    text-align: center;
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    flex-wrap: wrap;
  }
  
  .bpo-calculator-recalculate,
  .bpo-calculator-meeting {
    color: var(--color-white);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: var(--font-weight-medium);
    transition: background-color var(--transition-base);
    display: inline-block;
    text-decoration: none;
  }
  
  .bpo-calculator-recalculate {
    /* background-color: var(--color-primary); */
    padding: 10px var(--space-xl);
    font-size: var(--font-size-base);
    min-inline-size: 180px;
    block-size: var(--size-button-height);
    color: #000;
    margin-top: 5px;
    
    &:hover {
      /* background-color: var(--color-primary-hover); */
    }
  }
  
  .bpo-calculator-meeting {
    background-color: var(--color-secondary-light);
    padding: var(--space-md) var(--space-2xl);
    font-size: var(--font-size-lg);
    
    &:hover {
      background-color: var(--color-secondary);
    }
  }
  
  /* ========================================
     Responsive Design
     ======================================== */
  
  @media screen and (max-width: 768px) {
    .form-grid {
      grid-template-columns: 1fr;
      gap: var(--grid-gap-mobile);
      inline-size: 100%;
    }
  
    .form-group,
    .form-group.half-width,
    .form-group.small-width {
      inline-size: 100%;
      max-inline-size: none;
    }
  
    .form-section {
      padding: var(--space-lg);
      inline-size: 100%;
      box-sizing: border-box;
    }
  
    .bpo-calculator-submit {
      inline-size: 100%;
    }
  
    .results-container {
      flex-direction: column;
    }
  
    .results-columns {
      flex-direction: column;
      gap: 0;
    }
  
    .results-column {
      min-inline-size: 0;
      margin-block-end: var(--space-xl);
    }
  
    .savings-summary {
      flex-direction: column;
      gap: var(--space-lg);
    }
  
    .cost-label,
    .cost-value,
    .savings-label,
    .savings-value {
      flex-basis: auto;
      text-align: inherit;
    }
  
    .cost-item,
    .total-cost {
      flex-direction: column;
      align-items: flex-start;
    }
    
    .savings-item .savings-value {
      text-align: center;
    }
  }
  
  /* ========================================
     Legacy Table Styles (maintained for compatibility)
     ======================================== */
  
  .results-table-container {
    margin: var(--space-xl) 0;
    background: var(--color-bg-primary);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    overflow-x: auto;
  }
  
  .results-table {
    inline-size: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-base);
    min-inline-size: 600px;
    
    th,
    td {
      padding: var(--space-md) var(--space-lg);
      text-align: start;
      border-block-end: 1px solid #eee;
    }
    
    thead th {
      background-color: var(--color-primary);
      color: var(--color-white);
      font-weight: var(--font-weight-semibold);
      text-align: center;
      padding: var(--space-lg);
    }
    
    tbody th {
      inline-size: 30%;
      color: var(--color-text-primary);
      font-weight: var(--font-weight-medium);
      background-color: var(--color-bg-secondary);
    }
    
    td {
      inline-size: 35%;
      text-align: end;
    }
    
    tr.section-header th {
      background-color: var(--color-primary);
      color: var(--color-white);
      font-weight: var(--font-weight-semibold);
      font-size: var(--font-size-md);
      text-align: center;
      padding: var(--space-lg);
      border-block-end: none;
    }
    
    tr.section-header + tr th,
    tr.section-header + tr td {
      border-block-start: none;
    }
    
    tr.subtotal th,
    tr.subtotal td {
      background-color: var(--color-bg-secondary);
      font-weight: var(--font-weight-semibold);
      border-block-start: 2px solid var(--color-border);
    }
    
    tr.highlight {
      background-color: var(--color-primary-light);
      
      th {
        font-size: var(--font-size-lg);
        color: var(--color-primary);
        text-transform: uppercase;
        letter-spacing: 0.5px;
        padding: var(--space-xl) var(--space-lg);
      }
      
      td {
        font-size: var(--font-size-xl);
        font-weight: var(--font-weight-bold);
        color: var(--color-primary);
        padding: var(--space-xl) var(--space-lg);
        inline-size: 50%;
        text-align: center;
        
        &:first-child {
          border-inline-end: 1px solid var(--color-border-medium);
        }
        
        &:last-child {
          border-inline-start: 1px solid var(--color-border-medium);
        }
        
        &::before {
          content: attr(data-label);
          display: block;
          font-size: var(--font-size-base);
          font-weight: var(--font-weight-semibold);
          color: var(--color-text-primary);
          margin-block-end: 5px;
          text-transform: uppercase;
          letter-spacing: 0.5px;
        }
      }
    }
    
    tr:last-child td {
      border-block-end: none;
    }
  }