/* Import Nunito Sans from Google Fonts - Avenir alternative */
@import url('https://fonts.googleapis.com/css2?family=Nunito+Sans:ital,opsz,wght@0,6..12,200..1000;1,6..12,200..1000&display=swap');

:root {
    /* Lowe's inspired color palette */
    --lowes-blue: #004990;
    --lowes-light-blue: #0073B7;
    --lowes-bg: #ffffff;
    --lowes-light-gray: #f8f9fa;
    --lowes-gray: #6c757d;
    --lowes-dark-gray: #495057;
    --lowes-border: #dee2e6;
    --lowes-hover: #0056b3;
    --lowes-accent: #007bff;
    --lowes-success: #28a745;
    --lowes-green: #007935;
    --lowes-warning: #ffc107;
    --lowes-text: #212529;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.15);
  }
  
  * { 
    box-sizing: border-box; 
  }
  
  body {
    margin: 0;
    font-family: "Nunito Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--lowes-bg);
    color: var(--lowes-text);
    line-height: 1.5;
    font-size: 14px;
    min-height: 100vh;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
  
  /* Header Styling */
  .header {
    background: var(--lowes-blue);
    color: white;
    padding: 20px;
    box-shadow: var(--shadow);
  }
  
  .header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
  }
  
  .logo {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-shrink: 0;
  }
  
  .logo-icon {
    background: rgba(255,255,255,0.1);
    border-radius: 12px;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .logo-icon svg {
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
  }
  
  .brand-text h1 {
    margin: 0;
    font-size: 32px;
    font-weight: 800;
    letter-spacing: -0.5px;
    line-height: 1.1;
  }
  
  .brand-text .tagline {
    margin: 0;
    font-size: 14px;
    opacity: 0.85;
    font-weight: 500;
    margin-top: 2px;
  }
  
  .page-title {
    text-align: right;
    flex-grow: 1;
  }
  
  .page-title h2 {
    margin: 0 0 6px 0;
    font-size: 22px;
    font-weight: 700;
    line-height: 1.2;
  }
  
  .subtitle {
    color: rgba(255,255,255,0.8);
    margin: 0;
    font-size: 14px;
    line-height: 1.3;
  }
  
  /* Main Content Container */
  main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  /* Card Styling - Lowe's style containers */
  .card {
    background: rgb(244, 246, 250);
    border: none;
    border-radius: 0.5rem;
    padding: 24px;
    box-shadow: none;
    transition: none;
  }
  
  .card:hover {
    box-shadow: none;
  }
  
  .card h2 {
    margin: 0 0 20px 0;
    font-size: 18px;
    font-weight: 700;
    color: var(--lowes-blue);
    border-bottom: none;
    padding-bottom: 0;
  }
  
  /* Form Elements */
  .form-container {
    background: white;
    border-radius: 0.5rem;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    margin-bottom: 16px;
  }
  
  .button-container {
    background: white;
    border-radius: 0.5rem;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    margin-top: 16px;
    text-align: center;
  }
  
  label { 
    display: block; 
    margin-bottom: 8px; 
    color: var(--lowes-dark-gray);
    font-weight: 600;
    font-size: 14px;
  }
  
  select, button {
    background: white;
    color: var(--lowes-text);
    border: 1px solid #e2e8f0;
    border-radius: 0.5rem;
    padding: 12px 16px;
    font-size: 14px;
    transition: all 0.2s ease;
    font-family: inherit;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  }
  
  select {
    width: 100%;
    max-width: 300px;
  }
  
  select:focus {
    outline: none;
    border-color: var(--lowes-blue);
    box-shadow: 0 0 0 3px rgba(0, 73, 144, 0.1), 0 1px 3px rgba(0,0,0,0.05);
  }
  
  button {
    background: var(--lowes-blue);
    color: white;
    border-color: var(--lowes-blue);
    cursor: pointer;
    font-weight: 600;
    margin-right: 8px;
  }
  
  button:hover {
    background: var(--lowes-hover);
    border-color: var(--lowes-hover);
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  }
  
  /* Lowe's Green Button for Primary Actions */
  #suggestBtn {
    background: var(--lowes-green);
    border-color: var(--lowes-green);
    font-size: 16px;
    padding: 14px 24px;
    font-weight: 700;
    text-transform: none;
    letter-spacing: 0.02em;
  }
  
  #suggestBtn:hover {
    background: #006428;
    border-color: #006428;
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(0,121,53,0.3);
  }
  
  button:active {
    transform: translateY(0);
  }
  
  /* Pill/Badge Elements */
  .pill {
    display: inline-block;
    background: var(--lowes-light-blue);
    color: white;
    border-radius: 20px;
    padding: 6px 12px;
    margin-bottom: 8px;
    font-size: 13px;
    font-weight: 500;
  }
  
  /* Suggestion Items */
  .suggestion {
    border: 1px solid #e2e8f0;
    border-radius: 0.5rem;
    padding: 16px;
    margin-bottom: 12px;
    background: white;
    transition: all 0.2s ease;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  }
  
  .suggestion:hover {
    border-color: var(--lowes-light-blue);
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  }
  
  .row { 
    display: flex; 
    justify-content: space-between; 
    gap: 8px; 
    flex-wrap: wrap;
    align-items: flex-start;
  }
  
  .meta { 
    color: var(--lowes-gray); 
    font-size: 13px;
    line-height: 1.4;
  }
  
  /* Progress Bars */
  .bar {
    height: 8px;
    border-radius: 4px;
    background: var(--lowes-border);
    margin-top: 8px;
    overflow: hidden;
  }
  
  .bar > div {
    height: 100%;
    background: linear-gradient(90deg, var(--lowes-light-blue), var(--lowes-blue));
    width: 0%;
    transition: width 400ms ease;
    border-radius: 4px;
  }
  
  .kicker { 
    color: var(--lowes-gray); 
    font-size: 13px;
    margin-top: 6px;
  }
  

  /* Grid Layouts */
  .invoice-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
    margin-top: 12px;
  }

  /* Dropdown Container */
  .dropdown-container {
    background: white;
    border-radius: 0.5rem;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    margin-top: 12px;
  }

  .dropdown-group {
    margin-bottom: 16px;
  }

  .dropdown-group:last-child {
    margin-bottom: 0;
  }

  .dropdown-group select {
    width: 100%;
    max-width: 400px;
  }

  .dropdown-group select:disabled {
    background-color: #f8f9fa;
    color: #6c757d;
    cursor: not-allowed;
  }

  .dropdown-group select option:disabled {
    color: #6c757d;
    background-color: #f8f9fa;
  }
  
  .invoice-item {
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 0.5rem;
    padding: 16px;
    transition: all 0.2s ease;
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  }
  
  .invoice-item:hover {
    border-color: var(--lowes-light-blue);
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  }
  
  .invoice-item input[type="checkbox"] {
    margin-right: 8px;
    transform: scale(1.2);
    accent-color: var(--lowes-blue);
  }
  
  .invoice-item label {
    margin: 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    font-size: 14px;
  }
  
  .cols {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
  }
  
  .col {
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 0.5rem;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  }
  
  .col h3 {
    margin: 0 0 12px 0;
    font-size: 16px;
    color: var(--lowes-blue);
    font-weight: 600;
  }
  
  /* Footer */
  .footer {
    text-align: center;
    padding: 20px;
    background: var(--lowes-light-gray);
    border-top: 1px solid var(--lowes-border);
    margin-top: 40px;
  }
  
  .footer small {
    color: var(--lowes-gray);
    font-size: 12px;
  }
  
  /* Customer Row Layout */
  .customer-row {
    display: flex;
    gap: 24px;
    align-items: flex-start;
  }

  .customer-select-container {
    flex: 0 0 300px;
    background: white;
    border-radius: 0.5rem;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    min-height: 120px;
  }

  .customer-details-container {
    flex: 1;
    background: white;
    border-radius: 0.5rem;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    min-height: 120px;
  }

  .customer-details-container strong {
    color: var(--lowes-blue);
    font-size: 16px;
    margin-bottom: 0;
    padding-bottom: 0;
  }

  /* Three Column Row Layout */
  .three-column-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 20px;
  }

  .invoice-column, .history-column, .suggestion-column {
    background: white;
    border-radius: 0.5rem;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  }

  .invoice-column h3, .history-column h3, .suggestion-column h3 {
    margin: 0 0 12px 0;
    font-size: 16px;
    color: var(--lowes-blue);
    font-weight: 600;
  }

  .invoice-content {
    min-height: 200px;
  }

  .history-content {
    min-height: 200px;
  }

  .suggestion-content {
    min-height: 200px;
  }

  .suggestion-item {
    background: #f8fafc;
    border-radius: 0.375rem;
    padding: 12px;
    margin-bottom: 8px;
    border-left: 3px solid var(--lowes-green);
  }

  .suggestion-item:last-child {
    margin-bottom: 0;
  }

  .suggestion-item h4 {
    margin: 0 0 4px 0;
    font-size: 13px;
    font-weight: 600;
    color: var(--lowes-blue);
  }

  .suggestion-item .suggestion-meta {
    font-size: 11px;
    color: var(--lowes-gray);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 4px;
  }

  .suggestion-item .score-bar {
    height: 4px;
    border-radius: 2px;
    background: #e2e8f0;
    margin-top: 6px;
    overflow: hidden;
  }

  .suggestion-item .score-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--lowes-green), var(--lowes-light-blue));
    transition: width 400ms ease;
  }

  .history-content ul {
    list-style: none;
    padding: 0;
    margin: 0;
  }

  .history-content li {
    padding: 8px 0;
    border-bottom: 1px solid #f1f5f9;
    font-size: 13px;
    color: var(--lowes-gray);
  }

  .history-content li:last-child {
    border-bottom: none;
  }

  /* AI Components */
  .ai-insights-full-width {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border: 1px solid #0ea5e9;
    border-radius: 0.75rem;
    padding: 24px;
    margin-top: 8px;
  }

  .ai-insights-formatted {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
  }

  .ai-insight-card {
    background: white;
    border-radius: 0.5rem;
    padding: 16px;
    border-left: 4px solid var(--lowes-light-blue);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  }

  .ai-insight-card h4 {
    margin: 0 0 8px 0;
    font-size: 14px;
    font-weight: 700;
    color: var(--lowes-blue);
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .ai-insight-card .insight-icon {
    font-size: 16px;
  }

  .ai-insight-card p {
    margin: 0;
    font-size: 13px;
    line-height: 1.5;
    color: var(--lowes-dark-gray);
  }

  .ai-insight-card.preferences {
    border-left-color: #10b981;
  }

  .ai-insight-card.needs {
    border-left-color: #f59e0b;
  }

  .ai-insight-card.behavior {
    border-left-color: #8b5cf6;
  }

  .ai-recommendation-section {
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    border: 1px solid var(--lowes-green);
    border-radius: 0.75rem;
    padding: 20px;
    margin: 16px 0;
  }

  .ai-recommendation-section h3 {
    margin: 0 0 16px 0;
    font-size: 16px;
    font-weight: 700;
    color: var(--lowes-blue);
  }

  .recommendation-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 12px;
  }

  .recommendation-card {
    background: white;
    border-radius: 0.5rem;
    padding: 14px;
    border-left: 4px solid var(--lowes-green);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  }

  .recommendation-card h4 {
    margin: 0 0 8px 0;
    font-size: 14px;
    font-weight: 700;
    color: var(--lowes-blue);
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .recommendation-card p {
    margin: 0;
    font-size: 13px;
    line-height: 1.4;
    color: var(--lowes-dark-gray);
  }

  .recommendation-card .value-prop {
    color: var(--lowes-green);
    font-weight: 600;
  }

  .ai-content {
    font-size: 13px;
    line-height: 1.5;
    color: var(--lowes-dark-gray);
  }

  .ai-loading {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--lowes-gray);
    font-style: italic;
  }

  .ai-loading::before {
    content: "⏳";
    animation: pulse 1.5s ease-in-out infinite;
  }

  .ai-error {
    color: #dc2626;
    font-size: 12px;
    font-style: italic;
  }

  @keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
  }
  
  /* Invoice Meta */
  #invoiceMeta {
    font-weight: 500;
    padding: 12px 16px;
    background: white;
    border-radius: 0.5rem;
    border: none;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    margin-top: 12px;
  }
  
  
  /* Responsive Design - iPad and Mobile */
  
  /* iPad Portrait (768px) and up to Desktop */
  @media (min-width: 768px) and (max-width: 1024px) {
    body {
      font-size: 16px;
    }
    
    .header {
      padding: 24px;
    }
    
    .header-container {
      gap: 30px;
    }
    
    .brand-text h1 {
      font-size: 28px;
    }
    
    .page-title h2 {
      font-size: 20px;
    }
    
    .subtitle {
      font-size: 13px;
    }
    
    main {
      padding: 24px;
      gap: 24px;
    }
    
    .card {
      padding: 24px;
    }
    
    .cols {
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
    
    .invoice-grid {
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    }
    
    /* Tablet three column row - stack third column below first two */
    .three-column-row {
      grid-template-columns: 1fr 1fr;
      grid-template-areas: 
        "invoice1 invoice2"
        "history history";
    }
    
    .invoice-column:first-child {
      grid-area: invoice1;
    }
    
    .invoice-column:last-of-type {
      grid-area: invoice2;
    }
    
    .history-column {
      grid-area: history;
    }
  }
  
  /* Mobile Devices (up to 767px) */
  @media (max-width: 767px) {
    body {
      font-size: 14px;
    }
    
    .header {
      padding: 16px;
    }
    
    .header-container {
      flex-direction: column;
      gap: 16px;
      text-align: center;
    }
    
    .logo {
      gap: 12px;
    }
    
    .brand-text h1 {
      font-size: 26px;
    }
    
    .page-title {
      text-align: center;
    }
    
    .page-title h2 {
      font-size: 18px;
    }
    
    .subtitle {
      font-size: 13px;
    }
    
    main {
      padding: 16px;
      gap: 16px;
    }
    
    .card {
      padding: 16px;
    }
    
    .cols {
      grid-template-columns: 1fr;
    }
    
    .invoice-grid {
      grid-template-columns: 1fr;
    }
    
    .row {
      flex-direction: column;
      gap: 4px;
    }
    
    select {
      max-width: 100%;
    }
    
    button {
      width: 100%;
      margin-right: 0;
      margin-bottom: 8px;
    }
    
    /* Mobile customer row */
    .customer-row {
      flex-direction: column;
      gap: 16px;
    }
    
    .customer-select-container {
      flex: none;
    }
    
    /* Mobile three column row */
    .three-column-row {
      grid-template-columns: 1fr;
      gap: 16px;
    }
    
    /* Mobile AI insights */
    .ai-insights-formatted {
      grid-template-columns: 1fr;
      gap: 12px;
    }
    
    .ai-insights-full-width {
      padding: 16px;
    }
    
    /* Mobile recommendation cards */
    .recommendation-cards {
      grid-template-columns: 1fr;
      gap: 10px;
    }
    
    .ai-recommendation-section {
      padding: 16px;
      margin: 12px 0;
    }
  }
  
  /* Large Desktop (1200px+) */
  @media (min-width: 1200px) {
    main {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      grid-template-areas: 
        "customer customer"
        "overview overview"
        "insights insights"
        "picker picker"
        "suggestions suggestions"
        "additional additional";
    }
    
    .card:nth-child(1) { grid-area: customer; }
    .card:nth-child(2) { grid-area: overview; }
    .card:nth-child(3) { grid-area: insights; }
    .card:nth-child(4) { grid-area: picker; }
    .card:nth-child(5) { grid-area: suggestions; }
    .card:nth-child(6) { grid-area: additional; }
  }