/* Modern CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Material Design Color Palette */
    --primary-900: #0f172a;
    --primary-800: #1e293b;
    --primary-700: #334155;
    --primary-600: #475569;
    --primary-500: #64748b;
    --primary-400: #94a3b8;
    --primary-300: #cbd5e1;
    --primary-200: #e2e8f0;
    --primary-100: #f1f5f9;
    --primary-50: #f8fafc;
    
    /* Material Design Accent Colors */
    --accent-blue: #2196f3;
    --accent-blue-light: #64b5f6;
    --accent-green: #4caf50;
    --accent-green-light: #81c784;
    --accent-purple: #9c27b0;
    --accent-purple-light: #ba68c8;
    --accent-orange: #ff9800;
    --accent-orange-light: #ffb74d;
    --accent-red: #f44336;
    --accent-red-light: #e57373;
    
    /* Material Design Semantic Colors */
    --success: #4caf50;
    --warning: #ff9800;
    --error: #f44336;
    --info: #2196f3;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #eeeeee;
    --gray-300: #e0e0e0;
    --gray-400: #bdbdbd;
    --gray-500: #9e9e9e;
    --gray-600: #757575;
    --gray-700: #616161;
    --gray-800: #424242;
    --gray-900: #212121;
    
    /* Material Design Shadows */
    --shadow-xs: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-sm: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
    --shadow-md: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
    --shadow-lg: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22);
    --shadow-xl: 0 19px 38px rgba(0,0,0,0.30), 0 15px 12px rgba(0,0,0,0.22);
    --shadow-2xl: 0 25px 50px rgba(0,0,0,0.35), 0 20px 15px rgba(0,0,0,0.25);
    
    /* Material Design Border Radius */
    --radius-none: 0px;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    --radius-3xl: 24px;
    --radius-full: 9999px;
    
    /* Material Design Spacing */
    --space-0: 0px;
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    --space-24: 96px;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Line Heights */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;
    
    /* Transitions */
    --transition-all: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-colors: color 0.15s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.15s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-opacity: opacity 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-shadow: box-shadow 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-transform: transform 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Styles */
body {
    font-family: var(--font-family);
    line-height: var(--leading-relaxed);
    color: var(--gray-900);
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-900) 0%, var(--primary-800) 100%);
    color: var(--white);
    padding: var(--space-16) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
    opacity: 0.8;
}

.header h1 {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    margin-bottom: var(--space-4);
    position: relative;
    z-index: 1;
    background: linear-gradient(135deg, var(--white) 0%, var(--primary-200) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header h2 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--space-6);
    opacity: 0.95;
    position: relative;
    z-index: 1;
    color: var(--primary-100);
}

.header p {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    color: var(--primary-200);
}

/* Language Toggle */
.language-toggle {
    display: flex;
    gap: var(--space-2);
    justify-content: center;
    margin-bottom: var(--space-6);
    position: relative;
}

.language-toggle .material-btn {
    position: relative !important;
    transform: none !important;
    transition: all 0.2s ease !important;
    min-width: 60px !important;
    height: 36px !important;
    padding: var(--space-2) var(--space-3) !important;
    font-size: var(--font-size-sm) !important;
    font-weight: 600 !important;
    border-radius: var(--radius-md) !important;
    cursor: pointer !important;
    user-select: none !important;
    border: 2px solid var(--accent-blue) !important;
    background: var(--white) !important;
    color: var(--accent-blue) !important;
    box-shadow: var(--shadow-sm) !important;
}

.language-toggle .material-btn:hover {
    transform: translateY(-1px) !important;
    box-shadow: var(--shadow-md) !important;
}

.language-toggle .material-btn:active {
    transform: translateY(0) !important;
    box-shadow: var(--shadow-sm) !important;
}

.language-toggle .material-btn.active {
    background: var(--accent-blue) !important;
    color: var(--white) !important;
    box-shadow: var(--shadow-md) !important;
    border-color: var(--accent-blue) !important;
}

.language-toggle .material-btn:not(.active):hover {
    background: var(--accent-blue) !important;
    color: var(--white) !important;
}

/* Override any Material Design button styles that might interfere */
.language-toggle .material-btn::before {
    display: none !important;
}

.language-toggle .material-btn.material-btn-outlined {
    background: var(--white) !important;
    color: var(--accent-blue) !important;
    border: 2px solid var(--accent-blue) !important;
}

.language-toggle .material-btn.material-btn-outlined.active {
    background: var(--accent-blue) !important;
    color: var(--white) !important;
    border-color: var(--accent-blue) !important;
}

/* Main Content */
.main-content {
    padding: var(--space-16) 0;
}

/* SEO Content Section */
.seo-content {
    background: var(--white);
    padding: var(--space-16) 0;
    margin-bottom: var(--space-16);
    border-radius: var(--radius-3xl);
    box-shadow: var(--shadow-lg);
    margin: 0 var(--space-6) var(--space-16) var(--space-6);
}

.seo-content h2 {
    color: var(--primary-900);
    font-size: var(--font-size-4xl);
    text-align: center;
    margin-bottom: var(--space-6);
    font-weight: 700;
    line-height: var(--leading-tight);
}

.seo-content > .container > p {
    text-align: center;
    color: var(--gray-600);
    font-size: var(--font-size-lg);
    max-width: 800px;
    margin: 0 auto var(--space-8);
    line-height: var(--leading-relaxed);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
    margin-top: var(--space-8);
}

.benefit-item {
    background: var(--gray-50);
    padding: var(--space-8);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--gray-200);
    transition: var(--transition-all);
    position: relative;
    overflow: hidden;
}

.benefit-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple), var(--accent-green));
    transform: scaleX(0);
    transition: var(--transition-transform);
}

.benefit-item:hover::before {
    transform: scaleX(1);
}

.benefit-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    background: var(--white);
    border-color: var(--gray-300);
}

.benefit-item h3 {
    color: var(--primary-900);
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-4);
    font-weight: 700;
}

.benefit-item p {
    color: var(--gray-700);
    font-size: var(--font-size-base);
    line-height: var(--leading-relaxed);
}

/* Upload Section */
.upload-section {
    margin: var(--space-8) 0;
    padding: var(--space-6);
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

/* Supplier Selector */
.supplier-selector {
    margin-bottom: var(--space-6);
    padding: var(--space-4);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
}

.supplier-selector label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: 600;
    color: var(--gray-700);
}

.supplier-selector select {
    margin-bottom: var(--space-3);
}

.supplier-note {
    margin-top: var(--space-2);
}

.supplier-note .material-typography-caption {
    color: var(--gray-600);
    font-style: italic;
}

/* Upload Area */
.upload-area {
    background: var(--white);
    border: 2px dashed var(--primary-400);
    border-radius: var(--radius-3xl);
    padding: var(--space-16);
    text-align: center;
    transition: var(--transition-all);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.upload-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.05), transparent);
    transition: left 0.6s ease;
}

.upload-area:hover::before {
    left: 100%;
}

.upload-area:hover {
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-2xl);
    transform: translateY(-2px);
}

.upload-area.dragover {
    border-color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.02);
    box-shadow: var(--shadow-2xl);
    transform: scale(1.02);
}

.upload-icon {
    font-size: 5rem;
    margin-bottom: var(--space-6);
    opacity: 0.8;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.upload-area h3 {
    font-size: var(--font-size-2xl);
    color: var(--primary-900);
    margin-bottom: var(--space-4);
    font-weight: 700;
}

.upload-area p {
    color: var(--gray-600);
    margin-bottom: var(--space-6);
    font-size: var(--font-size-lg);
}

.upload-helper-text {
    margin-top: var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--gray-500);
    font-style: italic;
    line-height: var(--leading-relaxed);
}

/* Page Tiles */
.page-tiles {
    margin-top: var(--space-6);
    padding: var(--space-4);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
}

.page-tiles h4 {
    margin: 0 0 var(--space-4) 0;
    color: var(--gray-700);
    font-size: var(--font-size-lg);
}

.page-tiles-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.page-tile {
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: var(--space-3);
    position: relative;
    transition: all 0.2s ease;
    cursor: move;
}

.page-tile:hover {
    border-color: var(--primary-300);
    box-shadow: var(--shadow-sm);
}

.page-tile.dragging {
    opacity: 0.5;
    transform: scale(0.95);
}

.page-tile-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-2);
}

.page-tile-filename {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--gray-700);
    word-break: break-word;
    line-height: 1.3;
    flex: 1;
    margin-right: var(--space-2);
}

.page-tile-delete {
    background: none;
    border: none;
    color: var(--red-500);
    cursor: pointer;
    padding: var(--space-1);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-lg);
    line-height: 1;
    flex-shrink: 0;
}

.page-tile-delete:hover {
    background: var(--red-50);
}

.page-tile-info {
    font-size: var(--font-size-xs);
    color: var(--gray-500);
    margin-bottom: var(--space-2);
}

.page-tile-thumbnail {
    width: 100%;
    height: 120px;
    background: var(--gray-100);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    color: var(--gray-400);
    margin-bottom: var(--space-2);
}

.page-tile-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-sm);
}

.page-tile-thumbnail.pdf {
    background: var(--red-50);
    color: var(--red-500);
}

.add-page-btn {
    width: 100%;
    padding: var(--space-3);
    border: 2px dashed var(--gray-300);
    background: var(--white);
    color: var(--gray-600);
    font-weight: var(--font-weight-medium);
    transition: all 0.2s ease;
}

.add-page-btn:hover {
    border-color: var(--primary-300);
    color: var(--primary-600);
    background: var(--primary-50);
}

/* Multi-file Submit Section */
.multi-file-submit {
    margin-top: var(--space-6);
    padding: var(--space-4);
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.submit-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-3);
    background: var(--gray-50);
    border-radius: var(--radius-sm);
}

.submit-info span {
    font-weight: var(--font-weight-medium);
    color: var(--gray-700);
}

.submit-override {
    text-align: center;
    padding: var(--space-2);
}

.submit-override a {
    color: var(--primary-600);
    text-decoration: none;
    font-size: var(--font-size-sm);
}

.submit-override a:hover {
    text-decoration: underline;
}

/* Drag and Drop States */
.upload-area.dragover {
    border-color: var(--primary-400);
    background: var(--primary-50);
}

.upload-area.dragover .upload-icon {
    transform: scale(1.1);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-6);
    border: none;
    border-radius: var(--radius-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-all);
    position: relative;
    overflow: hidden;
    min-height: 48px;
    font-family: inherit;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-blue-light) 100%);
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: var(--white);
    color: var(--accent-blue);
    border: 2px solid var(--accent-blue);
}

.btn-secondary:hover {
    background: var(--accent-blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-download {
    background: linear-gradient(135deg, var(--accent-green) 0%, var(--accent-green-light) 100%);
    color: var(--white);
    font-weight: 700;
    box-shadow: var(--shadow-lg);
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* File Info */
.file-info {
    background: var(--white);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    margin-top: var(--space-6);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
}

.file-details {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
    padding: var(--space-6);
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
}

/* Loading Section */
.loading-section {
    text-align: center;
    padding: var(--space-16);
}

.spinner {
    width: 56px;
    height: 56px;
    border: 4px solid var(--gray-200);
    border-top: 4px solid var(--accent-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--space-6);
    box-shadow: var(--shadow-lg);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Results Section */
.results-section {
    background: var(--white);
    border-radius: var(--radius-3xl);
    padding: var(--space-16);
    box-shadow: var(--shadow-xl);
    margin-bottom: var(--space-16);
    border: 1px solid var(--gray-200);
}

.results-section h3 {
    color: var(--primary-900);
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-8);
    font-weight: 800;
    text-align: center;
}

.provider-info {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    color: var(--white);
    padding: var(--space-8);
    border-radius: var(--radius-2xl);
    margin-bottom: var(--space-8);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.provider-info h4 {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

/* Analysis Details */
.analysis-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

.detail-group {
    background: var(--gray-50);
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    transition: var(--transition-all);
}

.detail-group:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--gray-300);
}

.detail-group h5 {
    color: var(--primary-900);
    font-size: var(--font-size-sm);
    font-weight: 700;
    margin-bottom: var(--space-2);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.detail-group p {
    color: var(--gray-900);
    font-size: var(--font-size-lg);
    font-weight: 600;
}

/* Confidence Bar */
.confidence-bar {
    width: 100%;
    height: 12px;
    background: var(--gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin: var(--space-2) 0;
    box-shadow: var(--shadow-sm);
}

.confidence-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-green), var(--accent-blue));
    border-radius: var(--radius-full);
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Download Section */
.download-section {
    background: var(--gray-50);
    padding: var(--space-8);
    border-radius: var(--radius-2xl);
    margin-bottom: var(--space-8);
    text-align: center;
    border: 1px solid var(--gray-200);
}

.download-section h4 {
    color: var(--primary-900);
    margin-bottom: var(--space-6);
    font-weight: 700;
    font-size: var(--font-size-xl);
}

.download-buttons {
    display: flex;
    gap: var(--space-6);
    justify-content: center;
    flex-wrap: wrap;
}

/* Notes Section */
.notes-section {
    background: var(--gray-50);
    padding: var(--space-8);
    border-radius: var(--radius-2xl);
    margin-bottom: var(--space-8);
    border: 1px solid var(--gray-200);
}

.notes-section h4 {
    color: var(--primary-900);
    margin-bottom: var(--space-6);
    font-weight: 700;
    font-size: var(--font-size-xl);
}

.notes-section ul {
    list-style: none;
}

.notes-section li {
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--gray-200);
    color: var(--gray-700);
    font-size: var(--font-size-base);
}

.notes-section li:last-child {
    border-bottom: none;
}

/* Tariff Fitness Section */
#insights {
    background: var(--white);
    border-radius: var(--radius-3xl);
    padding: var(--space-16);
    box-shadow: var(--shadow-xl);
    margin-bottom: var(--space-8);
    border: 1px solid var(--gray-200);
}

#insights h3 {
    color: var(--primary-900);
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-8);
    font-weight: 800;
    text-align: center;
}

.controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
    margin-bottom: var(--space-8);
}

.control-group {
    display: flex;
    flex-direction: column;
    background: var(--gray-50);
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
}

.control-group label {
    color: var(--primary-900);
    font-weight: 700;
    margin-bottom: var(--space-4);
    font-size: var(--font-size-base);
}

.control-group input[type="range"] {
    width: 100%;
    height: 8px;
    border-radius: var(--radius-full);
    background: var(--gray-200);
    outline: none;
    -webkit-appearance: none;
    cursor: pointer;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--accent-blue);
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    border: 3px solid var(--white);
    transition: var(--transition-all);
}

.control-group input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
}

.control-group input[type="range"]::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--accent-blue);
    cursor: pointer;
    border: 3px solid var(--white);
    box-shadow: var(--shadow-lg);
}

.control-group input[type="number"] {
    padding: var(--space-4);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-xl);
    font-size: var(--font-size-base);
    transition: var(--transition-colors);
    background: var(--white);
    font-family: inherit;
}

.control-group input[type="number"]:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Data Freshness */
.data-freshness {
    text-align: center;
    margin-bottom: var(--space-8);
    padding: var(--space-6);
    background: linear-gradient(135deg, var(--accent-orange-light) 0%, var(--accent-orange) 100%);
    border-radius: var(--radius-2xl);
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.data-freshness small {
    font-size: var(--font-size-sm);
    font-weight: 600;
}

/* Table Styles */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--space-8);
    border: 1px solid var(--gray-200);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
}

thead {
    background: linear-gradient(135deg, var(--primary-900) 0%, var(--primary-800) 100%);
    color: var(--white);
}

th {
    padding: var(--space-6);
    text-align: left;
    font-weight: 700;
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

td {
    padding: var(--space-6);
    border-bottom: 1px solid var(--gray-200);
    vertical-align: middle;
    font-size: var(--font-size-sm);
}

tbody tr {
    transition: var(--transition-colors);
}

tbody tr:hover {
    background: var(--gray-50);
}

/* Special Row Styles */
.night-usage-header {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    color: var(--white);
    font-weight: 700;
}

/* Current Plan Row Styling */
.current-plan {
    background: var(--accent-blue-50);
    border: 2px solid var(--accent-blue-200);
}

.current-plan td {
    font-weight: 600;
    color: var(--primary-900);
}

.current-plan td:first-child {
    color: var(--accent-blue-700);
    font-weight: 700;
}

/* Best Plan Row Styling */
.best-plan {
    background: var(--accent-green-50);
    border-left: 4px solid var(--accent-green-500);
}

.best-plan td:first-child {
    color: var(--accent-green-700);
    font-weight: 700;
}

.info-note {
    background: var(--gray-100);
    color: var(--gray-600);
    font-style: italic;
}

/* Savings Display */
.savings-cell {
    font-weight: 700;
}

.savings-positive {
    color: var(--accent-green);
}

.savings-negative {
    color: var(--error);
}

/* Verify Link */
.verify-link {
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-colors);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
}

.verify-link:hover {
    color: var(--accent-blue-light);
    background: var(--gray-100);
}

/* Footer Note */
.footer-note {
    background: var(--gray-50);
    padding: var(--space-6);
    border-radius: var(--radius-2xl);
    margin-bottom: var(--space-8);
    text-align: center;
    border: 1px solid var(--gray-200);
}

.footer-note small {
    color: var(--gray-600);
    font-size: var(--font-size-sm);
}

/* Error Section */
.error-section {
    margin: var(--space-6) 0;
    padding: var(--space-4);
    background: var(--red-50);
    border: 1px solid var(--red-200);
    border-radius: var(--radius-md);
    text-align: center;
}

.error-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
}

.error-icon {
    font-size: var(--font-size-2xl);
    color: var(--red-500);
}

.error-message {
    color: var(--red-700);
    font-weight: var(--font-weight-medium);
    margin: 0;
}

/* Guided Flow Section */
.guided-flow-section {
    margin: var(--space-6) 0;
    padding: var(--space-4);
    background: var(--blue-50);
    border: 1px solid var(--blue-200);
    border-radius: var(--radius-md);
    text-align: center;
}

.guided-flow-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
}

.guided-flow-icon {
    font-size: var(--font-size-2xl);
    color: var(--blue-500);
}

.guided-flow-section h4 {
    color: var(--blue-700);
    font-weight: var(--font-weight-medium);
    margin: 0;
    font-size: var(--font-size-lg);
}

.guided-flow-section p {
    color: var(--blue-600);
    font-weight: var(--font-weight-normal);
    margin: 0;
    line-height: 1.5;
}

.guided-flow-actions {
    display: flex;
    gap: var(--space-3);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--space-3);
}

.guided-flow-actions .btn {
    min-width: 140px;
}

/* Footer */
.footer {
    background: linear-gradient(135deg, var(--primary-900) 0%, var(--primary-800) 100%);
    color: var(--white);
    padding: var(--space-16) 0;
    text-align: center;
    margin-top: var(--space-16);
}

.footer p {
    margin-bottom: var(--space-4);
    opacity: 0.9;
    color: var(--primary-200);
}

.footer p:last-child {
    margin-bottom: 0;
}

/* Lazy Loading */
.lazy {
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

.lazy.loaded {
    opacity: 1;
}

/* Performance optimizations */
img {
    max-width: 100%;
    height: auto;
}

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .container {
        padding: 0 var(--space-4);
    }
    
    .header h1 {
        font-size: var(--font-size-4xl);
    }
    
    .header h2 {
        font-size: var(--font-size-xl);
    }
    
    .seo-content {
        margin: 0 var(--space-4) var(--space-12) var(--space-4);
    }
    
    .benefits-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: var(--space-6);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-4);
    }
    
    .header {
        padding: var(--space-12) 0;
    }
    
    .header h1 {
        font-size: var(--font-size-3xl);
    }
    
    .header h2 {
        font-size: var(--font-size-lg);
    }
    
    .header p {
        font-size: var(--font-size-base);
    }
    
    .main-content {
        padding: var(--space-12) 0;
    }
    
    .seo-content {
        padding: var(--space-12) 0;
        margin: 0 var(--space-4) var(--space-12) var(--space-4);
    }
    
    .seo-content h2 {
        font-size: var(--font-size-2xl);
    }
    
    .seo-content > .container > p {
        font-size: var(--font-size-base);
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .upload-area {
        padding: var(--space-12);
    }
    
    .upload-icon {
        font-size: 4rem;
    }
    
    .upload-area h3 {
        font-size: var(--font-size-xl);
    }
    
    .upload-area p {
        font-size: var(--font-size-base);
    }
    
    .analysis-details {
        grid-template-columns: 1fr;
    }
    
    .controls {
        grid-template-columns: 1fr;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 320px;
    }
    
    .language-toggle {
        position: relative;
        top: auto;
        right: auto;
        margin: 0 auto var(--space-6);
    }
    
    .results-section,
    #insights {
        padding: var(--space-8);
        margin: 0 var(--space-4) var(--space-8) var(--space-4);
    }
    
    .results-section h3,
    #insights h3 {
        font-size: var(--font-size-2xl);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-3);
    }
    
    .header {
        padding: var(--space-8) 0;
    }
    
    .header h1 {
        font-size: var(--font-size-2xl);
    }
    
    .header h2 {
        font-size: var(--font-size-base);
    }
    
    .upload-area {
        padding: var(--space-8);
    }
    
    .upload-icon {
        font-size: 3rem;
    }
    
    .seo-content {
        margin: 0 var(--space-3) var(--space-8) var(--space-3);
        padding: var(--space-8) 0;
    }
    
    .seo-content h2 {
        font-size: var(--font-size-xl);
    }
    
    .results-section,
    #insights {
        padding: var(--space-6);
        margin: 0 var(--space-3) var(--space-6) var(--space-3);
    }
    
    .table-container {
        font-size: var(--font-size-xs);
    }
    
    th, td {
        padding: var(--space-3);
    }
    
    .btn {
        padding: var(--space-4) var(--space-5);
        font-size: var(--font-size-sm);
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Smooth transitions for all interactive elements */
* {
    transition: var(--transition-all);
}

/* Focus styles for accessibility */
button:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .header,
    .upload-section,
    .controls,
    .btn,
    .language-toggle {
        display: none !important;
    }
    
    .results-section,
    #insights {
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }
}

/* Custom scrollbar */
.table-container::-webkit-scrollbar {
    height: 8px;
}

.table-container::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: var(--radius-full);
}

.table-container::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: var(--radius-full);
}

.table-container::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

/* Animation for benefit items */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.benefit-item {
    animation: fadeInUp 0.6s ease-out;
}

.benefit-item:nth-child(1) { animation-delay: 0.1s; }
.benefit-item:nth-child(2) { animation-delay: 0.2s; }
.benefit-item:nth-child(3) { animation-delay: 0.3s; }
.benefit-item:nth-child(4) { animation-delay: 0.4s; }

/* Hover effects for interactive elements */
.btn:hover {
    transform: translateY(-2px);
}

.benefit-item:hover {
    transform: translateY(-4px) scale(1.02);
}

.detail-group:hover {
    transform: translateY(-2px) scale(1.01);
}

/* Loading animation enhancement */
.loading-section p {
    color: var(--gray-600);
    font-size: var(--font-size-lg);
    font-weight: 500;
    margin-top: var(--space-4);
}

/* Enhanced file info styling */
.file-details span:first-child {
    font-weight: 600;
    color: var(--primary-900);
}

.file-details span:last-child {
    color: var(--gray-600);
}

/* Enhanced table responsiveness */
@media (max-width: 640px) {
    .table-container {
        margin: 0 calc(-1 * var(--space-3));
    }
    
    table {
        min-width: 600px;
    }
}

/* Enhanced mobile experience and modern UI elements */
@media (max-width: 640px) {
    .table-container {
        margin: 0 calc(-1 * var(--space-3));
        border-radius: 0;
    }
    
    table {
        min-width: 600px;
    }
    
    .upload-area {
        border-radius: var(--radius-2xl);
        margin: 0 var(--space-2);
    }
    
    .seo-content {
        margin: 0 var(--space-2) var(--space-8) var(--space-2);
        border-radius: var(--radius-2xl);
    }
    
    .results-section,
    #insights {
        margin: 0 var(--space-2) var(--space-6) var(--space-2);
        border-radius: var(--radius-2xl);
    }
}

/* Enhanced focus states for better accessibility */
.btn:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

/* Improved button states */
.btn:active {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Enhanced upload area interactions */
.upload-area:focus-visible {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

/* Smooth scrolling for better UX */
html {
    scroll-behavior: smooth;
}

/* Enhanced table row interactions */
tbody tr:focus-within {
    background: var(--accent-blue-light);
    outline: 2px solid var(--accent-blue);
    outline-offset: -2px;
}

/* Improved loading states */
.loading-section {
    position: relative;
}

.loading-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(4px);
    border-radius: var(--radius-3xl);
}

.loading-section > * {
    position: relative;
    z-index: 1;
}

/* Enhanced error states */
.error-section {
    border-left: 4px solid var(--error);
}

.error-section::before {
    content: '⚠️';
    font-size: var(--font-size-3xl);
    display: block;
    margin-bottom: var(--space-4);
}

/* Improved file info display */
.file-details {
    position: relative;
}

.file-details::before {
    content: '📎';
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    font-size: var(--font-size-lg);
}

.file-details span:first-child {
    margin-left: var(--space-8);
}

/* Enhanced confidence bar */
.confidence-bar {
    position: relative;
    overflow: visible;
}

.confidence-fill::after {
    content: attr(data-value);
    position: absolute;
    right: -30px;
    top: -2px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--gray-600);
    background: var(--white);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    opacity: 0;
    transition: var(--transition-opacity);
}

.confidence-bar:hover .confidence-fill::after {
    opacity: 1;
}

/* Improved benefit items */
.benefit-item {
    position: relative;
    overflow: hidden;
}

.benefit-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(59, 130, 246, 0.02) 100%);
    opacity: 0;
    transition: var(--transition-opacity);
}

.benefit-item:hover::after {
    opacity: 1;
}

/* Enhanced control inputs */
.control-group input[type="range"] {
    position: relative;
}

.control-group input[type="range"]::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 0;
    right: 0;
    height: 24px;
    background: transparent;
    cursor: pointer;
}

/* Improved mobile touch targets */
@media (max-width: 768px) {
    .btn {
        min-height: 56px;
        padding: var(--space-4) var(--space-6);
    }
    
    .lang-btn {
        min-height: 44px;
        padding: var(--space-3) var(--space-5);
    }
    
    .upload-area {
        min-height: 200px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }
    
    .benefit-item {
        min-height: 200px;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }
}

/* Enhanced animations */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Apply animations to sections */
.seo-content,
.upload-section,
.results-section,
#insights {
    animation: slideInUp 0.8s ease-out;
}

.benefit-item {
    animation: scaleIn 0.6s ease-out;
}

.file-info,
.loading-section,
.error-section {
    animation: fadeIn 0.4s ease-out;
}

/* Enhanced hover effects */
.benefit-item:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: var(--shadow-2xl);
}

.detail-group:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

/* Improved focus management */
.upload-area:focus-visible {
    transform: scale(1.02);
}

/* Enhanced mobile navigation */
@media (max-width: 480px) {
    .header {
        position: relative;
    }
    
    .language-toggle {
        position: absolute;
        top: var(--space-4);
        right: var(--space-4);
        z-index: 20;
    }
    
    .main-content {
        padding-top: var(--space-8);
    }
    
    .upload-area {
        margin: 0 var(--space-2);
    }
}

/* Print optimizations */
@media print {
    .header {
        background: var(--white) !important;
        color: var(--gray-900) !important;
        padding: var(--space-6) 0;
    }
    
    .header h1,
    .header h2 {
        color: var(--gray-900) !important;
        -webkit-text-fill-color: var(--gray-900) !important;
    }
    
    .header p {
        color: var(--gray-600) !important;
    }
    
    .seo-content,
    .results-section,
    #insights {
        break-inside: avoid;
        page-break-inside: avoid;
    }
    
    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-4);
    }
    
    .btn {
        display: none !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --accent-blue: #0066cc;
        --accent-green: #006600;
        --accent-purple: #660066;
        --accent-orange: #cc6600;
    }
    
    .btn {
        border: 2px solid currentColor;
    }
    
    .upload-area {
        border: 3px dashed currentColor;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .spinner {
        animation: none;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --white: #1a1a1a;
        --gray-50: #262626;
        --gray-100: #404040;
        --gray-200: #525252;
        --gray-300: #737373;
        --gray-400: #a3a3a3;
        --gray-500: #d4d4d4;
        --gray-600: #e5e5e5;
        --gray-700: #f5f5f5;
        --gray-800: #fafafa;
        --gray-900: #ffffff;
        --primary-900: #f8fafc;
        --primary-800: #f1f5f9;
        --primary-700: #e2e8f0;
        --primary-600: #cbd5e1;
        --primary-500: #94a3b8;
        --primary-400: #64748b;
        --primary-300: #475569;
        --primary-200: #334155;
        --primary-100: #1e293b;
        --primary-50: #0f172a;
    }
    
    body {
        background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    }
    
    .header {
        background: linear-gradient(135deg, var(--primary-50) 0%, var(--primary-100) 100%);
    }
    
    .header h1 {
        background: linear-gradient(135deg, var(--gray-900) 0%, var(--primary-700) 100%);
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    
    .header h2,
    .header p {
        color: var(--primary-800);
    }
}

/* Filter Controls Section */
.filter-controls {
    background: var(--gray-50);
    padding: var(--space-8);
    border-radius: var(--radius-2xl);
    margin-bottom: var(--space-8);
    border: 1px solid var(--gray-200);
}

.filter-controls h4 {
    color: var(--primary-900);
    margin-bottom: var(--space-6);
    font-weight: 700;
    font-size: var(--font-size-xl);
    text-align: center;
}

.filter-row {
    margin-bottom: var(--space-6);
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.filter-group label {
    color: var(--primary-900);
    font-weight: 600;
    font-size: var(--font-size-sm);
}

/* Toggle Switch Styles */
.filter-toggle-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
    min-height: 32px;
    padding: var(--space-2) 0;
    gap: var(--space-3);
}

.filter-toggle {
    display: none;
}

.toggle-slider {
    position: relative;
    width: 48px;
    height: 24px;
    background: var(--gray-300);
    border-radius: var(--radius-full);
    transition: var(--transition-all);
    cursor: pointer;
    flex-shrink: 0;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: var(--white);
    border-radius: 50%;
    transition: var(--transition-transform);
    box-shadow: var(--shadow-sm);
}

.filter-toggle:checked + .toggle-slider {
    background: var(--accent-blue);
}

.filter-toggle:checked + .toggle-slider::before {
    transform: translateX(24px);
}

.toggle-text {
    color: var(--primary-900);
    font-size: var(--font-size-sm);
    font-weight: 600;
    line-height: 1.4;
    flex: 1;
    min-width: 0;
    word-wrap: break-word;
}

/* Filter Select Styles */
.filter-select {
    padding: var(--space-3);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-xl);
    font-size: var(--font-size-sm);
    background: var(--white);
    transition: var(--transition-colors);
    cursor: pointer;
    font-family: inherit;
}

.filter-select:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.filter-select:hover {
    border-color: var(--gray-300);
}

/* Filter Range Input Styles */
.filter-group input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: var(--radius-full);
    background: var(--gray-200);
    outline: none;
    -webkit-appearance: none;
    cursor: pointer;
    margin: var(--space-2) 0;
}

.filter-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-blue);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    border: 3px solid var(--white);
    transition: var(--transition-all);
}

.filter-group input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.filter-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-blue);
    cursor: pointer;
    border: 3px solid var(--white);
    box-shadow: var(--shadow-md);
}

/* Filter Actions */
.filter-actions {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    margin-bottom: var(--space-6);
    flex-wrap: wrap;
}

.filter-actions .btn {
    min-width: 120px;
}

/* Filter Summary */
.filter-summary {
    text-align: center;
    padding: var(--space-4);
    background: var(--white);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
}

.filter-summary small {
    color: var(--gray-600);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* Enhanced Table Styles for New Contract Column */
#recommendationsTable th:nth-child(4),
#recommendationsTable td:nth-child(4) {
    max-width: 120px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Responsive Filter Design */
@media (max-width: 768px) {
    .filter-row {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .filter-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .filter-actions .btn {
        width: 100%;
        max-width: 200px;
    }
    
    .filter-controls {
        padding: var(--space-6);
    }
}

@media (max-width: 480px) {
    .filter-controls {
        padding: var(--space-4);
    }
    
    .filter-group label {
        font-size: var(--font-size-xs);
    }
    

}

/* Filter Animation */
.filter-controls {
    animation: slideInUp 0.6s ease-out;
}

.filter-group {
    transition: var(--transition-all);
}

.filter-group:hover {
    transform: translateY(-1px);
}

/* Enhanced Filter States */
.filter-controls:focus-within {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Filter Loading State */
.filter-controls.loading {
    opacity: 0.7;
    pointer-events: none;
}

.filter-controls.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    border: 2px solid var(--accent-blue);
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    transform: translate(-50%, -50%);
}

/* Material Design Card Styles */
.material-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

.material-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.material-card.elevated {
    box-shadow: var(--shadow-md);
}

.material-card.elevated:hover {
    box-shadow: var(--shadow-lg);
}

.material-card-header {
    padding: var(--space-6) var(--space-6) var(--space-4);
    border-bottom: 1px solid var(--gray-200);
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
}

.material-card-content {
    padding: var(--space-6);
}

.material-card-actions {
    padding: var(--space-4) var(--space-6) var(--space-6);
    border-top: 1px solid var(--gray-200);
    background: var(--gray-50);
}

/* Material Design Button Styles */
.material-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-6);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    min-height: 44px;
    line-height: 1.5;
}

.material-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.material-btn:hover::before {
    width: 300px;
    height: 300px;
}

.material-btn-primary {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-blue-light) 100%);
    color: var(--white);
    box-shadow: var(--shadow-sm);
}

.material-btn-primary:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.material-btn-secondary {
    background: var(--white);
    color: var(--accent-blue);
    border: 2px solid var(--accent-blue);
}

.material-btn-secondary:hover {
    background: var(--accent-blue);
    color: var(--white);
    box-shadow: var(--shadow-sm);
}

.material-btn-success {
    background: linear-gradient(135deg, var(--accent-green) 0%, var(--accent-green-light) 100%);
    color: var(--white);
    box-shadow: var(--shadow-sm);
}

.material-btn-success:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.material-btn-outlined {
    background: transparent;
    color: var(--accent-blue);
    border: 2px solid var(--accent-blue);
}

.material-btn-outlined:hover {
    background: var(--accent-blue);
    color: var(--white);
}

/* Material Design Typography */
.material-typography-h1 {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: var(--leading-tight);
    color: var(--gray-900);
    margin-bottom: var(--space-4);
}

.material-typography-h2 {
    font-size: var(--font-size-4xl);
    font-weight: 600;
    line-height: var(--leading-tight);
    color: var(--gray-800);
    margin-bottom: var(--space-3);
}

.material-typography-h3 {
    font-size: var(--font-size-3xl);
    font-weight: 600;
    line-height: var(--leading-snug);
    color: var(--gray-800);
    margin-bottom: var(--space-3);
}

.material-typography-h4 {
    font-size: var(--font-size-2xl);
    font-weight: 500;
    line-height: var(--leading-snug);
    color: var(--gray-700);
    margin-bottom: var(--space-2);
}

.material-typography-body1 {
    font-size: var(--font-size-lg);
    line-height: var(--leading-relaxed);
    color: var(--gray-600);
    margin-bottom: var(--space-3);
}

.material-typography-body2 {
    font-size: var(--font-size-base);
    line-height: var(--leading-normal);
    color: var(--gray-600);
    margin-bottom: var(--space-2);
}

.material-typography-caption {
    font-size: var(--font-size-sm);
    line-height: var(--leading-normal);
    color: var(--gray-500);
    margin-bottom: var(--space-1);
}

/* Material Design Grid System */
.material-grid {
    display: grid;
    gap: var(--space-6);
}

.material-grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.material-grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.material-grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Material Design Container */
.material-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

@media (min-width: 768px) {
    .material-container {
        padding: 0 var(--space-6);
    }
}

@media (min-width: 1024px) {
    .material-container {
        padding: 0 var(--space-8);
    }
}

/* Material Design Section Spacing */
.material-section {
    padding: var(--space-16) 0;
}

.material-section-sm {
    padding: var(--space-8) 0;
}

.material-section-lg {
    padding: var(--space-24) 0;
}

/* Material Design Divider */
.material-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--gray-300) 50%, transparent 100%);
    margin: var(--space-6) 0;
    border: none;
}

/* Material Design Badge */
.material-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    line-height: 1;
}

.material-badge-primary {
    background: var(--accent-blue);
    color: var(--white);
}

.material-badge-success {
    background: var(--accent-green);
    color: var(--white);
}

.material-badge-warning {
    background: var(--accent-orange);
    color: var(--white);
}

.material-badge-error {
    background: var(--accent-red);
    color: var(--white);
}

/* Material Design Input Styles */
.material-input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--leading-normal);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--white);
}

.material-input:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.material-input:hover {
    border-color: var(--gray-400);
}

/* Material Design Select Styles */
.material-select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--leading-normal);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--white);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right var(--space-3) center;
    background-repeat: no-repeat;
    background-size: 16px;
    padding-right: var(--space-10);
}

.material-select:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.material-select:hover {
    border-color: var(--gray-400);
}

/* Material Design Upload Area */
.material-upload-area {
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--gray-50);
    margin-bottom: var(--space-6);
}

.material-upload-area:hover {
    border-color: var(--accent-blue);
    background: var(--blue-50);
}

.material-upload-area.dragover {
    border-color: var(--accent-blue);
    background: var(--blue-100);
    transform: scale(1.02);
}

.material-upload-icon {
    font-size: 3rem;
    margin-bottom: var(--space-4);
    display: block;
}

.material-upload-area h3 {
    margin: 0 0 var(--space-4) 0;
    color: var(--gray-800);
}

.material-upload-area p {
    margin: 0 0 var(--space-6) 0;
    color: var(--gray-600);
    line-height: 1.6;
}

.material-upload-area .material-btn {
    margin-bottom: var(--space-4);
}

.material-upload-area .material-typography-body2 {
    margin: 0;
    color: var(--gray-500);
    font-size: var(--font-size-sm);
}

/* Upload Options Toggle */
.upload-options-toggle {
    margin-bottom: var(--space-6);
}

.toggle-buttons {
    display: flex;
    gap: var(--space-2);
    justify-content: center;
}

.toggle-btn {
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.toggle-btn.active {
    background: var(--accent-blue);
    color: var(--white);
    border-color: var(--accent-blue);
}

.toggle-btn:not(.active):hover {
    background: var(--gray-100);
    border-color: var(--accent-blue);
}

/* Supplier Notice */
.supplier-notice {
    margin: var(--space-4) 0;
    text-align: left;
}

.supplier-notice p {
    margin: 0;
    font-size: var(--font-size-sm);
}

/* Manual Entry Form */
.manual-entry-form {
    margin-bottom: var(--space-6);
}

.manual-entry-form .material-card {
    border: 2px solid var(--gray-200);
}

.form-grid {
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-group label {
    font-weight: 500;
    color: var(--gray-700);
}

.form-group .material-input,
.form-group .material-select {
    padding: var(--space-3);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: border-color 0.3s ease;
}

.form-group .material-input:focus,
.form-group .material-select:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

/* Date input specific styling */
.form-group input[type="date"] {
    font-family: inherit;
    color: var(--gray-700);
}

.form-group input[type="date"]::-webkit-calendar-picker-indicator {
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.form-group input[type="date"]::-webkit-calendar-picker-indicator:hover {
    opacity: 1;
}

.form-actions {
    display: flex;
    gap: var(--space-3);
    justify-content: flex-end;
    align-items: center;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
    width: 100%;
}

/* Material Design Progress Bar */
.material-progress {
    width: 100%;
    height: 8px;
    background: var(--gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.material-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-blue) 0%, var(--accent-blue-light) 100%);
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
}

/* Material Design Alert */
.material-alert {
    padding: var(--space-4);
    border-radius: var(--radius-md);
    border-left: 4px solid;
    margin-bottom: var(--space-4);
}

.material-alert-info {
    background: rgba(33, 150, 243, 0.1);
    border-left-color: var(--accent-blue);
    color: var(--accent-blue);
}

.material-alert-success {
    background: rgba(76, 175, 80, 0.1);
    border-left-color: var(--accent-green);
    color: var(--accent-green);
}

.material-alert-warning {
    background: rgba(255, 152, 0, 0.1);
    border-left-color: var(--accent-orange);
    color: var(--accent-orange);
}

.material-alert-error {
    background: rgba(244, 67, 54, 0.1);
    border-left-color: var(--accent-red);
    color: var(--accent-red);
}

/* Material Design Animation Classes */
.material-fade-in {
    animation: fadeIn 0.6s ease-in-out;
}

.material-slide-up {
    animation: slideUp 0.6s ease-out;
}

.material-scale-in {
    animation: scaleIn 0.4s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { 
        opacity: 0;
        transform: translateY(20px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from { 
        opacity: 0;
        transform: scale(0.9);
    }
    to { 
        opacity: 1;
        transform: scale(1);
    }
}

/* Responsive Design Improvements */
@media (max-width: 768px) {
    .material-typography-h1 {
        font-size: var(--font-size-4xl);
    }
    
    .material-typography-h2 {
        font-size: var(--font-size-3xl);
    }
    
    .material-typography-h3 {
        font-size: var(--font-size-2xl);
    }
    
    .material-section {
        padding: var(--space-8) 0;
    }
    
    .material-section-lg {
        padding: var(--space-16) 0;
    }
    
    .material-grid-2,
    .material-grid-3,
    .material-grid-4 {
        grid-template-columns: 1fr;
    }
    
    .material-upload-area {
        padding: var(--space-8);
    }
}

@media (max-width: 480px) {
    .material-container {
        padding: 0 var(--space-3);
    }
    
    .material-card-content {
        padding: var(--space-4);
    }
    
    .material-card-header {
        padding: var(--space-4) var(--space-4) var(--space-3);
    }
}

/* Additional Material Design Styles */
.text-center {
    text-align: center;
}

/* Language Toggle Styling */
.language-toggle {
    display: flex;
    gap: var(--space-2);
    justify-content: center;
    margin-bottom: var(--space-6);
    position: relative;
}

.language-toggle .material-btn {
    position: relative;
    transform: none !important;
    transition: all 0.2s ease;
    min-width: 60px;
    height: 36px;
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    user-select: none;
    border: 2px solid var(--accent-blue);
}

.language-toggle .material-btn:hover {
    transform: translateY(-1px) !important;
    box-shadow: var(--shadow-md);
}

.language-toggle .material-btn:active {
    transform: translateY(0) !important;
    box-shadow: var(--shadow-sm);
}

.language-toggle .material-btn.active {
    background: var(--accent-blue) !important;
    color: var(--white) !important;
    box-shadow: var(--shadow-md);
    border-color: var(--accent-blue) !important;
}

.language-toggle .material-btn:not(.active) {
    background: var(--white) !important;
    color: var(--accent-blue) !important;
}

.language-toggle .material-btn:not(.active):hover {
    background: var(--accent-blue) !important;
    color: var(--white) !important;
}

/* Upload Area Styling */
.material-upload-icon {
    font-size: 3rem;
    margin-bottom: var(--space-4);
    display: block;
}

/* Supplier Selector Styling */
.supplier-selector {
    margin-bottom: var(--space-6);
    padding: var(--space-4);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
}

.supplier-selector label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: 600;
    color: var(--gray-700);
}

.supplier-selector select {
    margin-bottom: var(--space-3);
}

.supplier-note {
    margin-top: var(--space-2);
}

.supplier-note .material-typography-caption {
    color: var(--gray-600);
    font-style: italic;
}

/* Page Tiles Styling */
.page-tiles {
    margin-top: var(--space-6);
}

.page-tiles h4 {
    margin-bottom: var(--space-4);
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.page-tiles-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

/* File Info Styling */
.file-info {
    margin-top: var(--space-6);
    padding: var(--space-4);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
}

.file-details {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
    gap: var(--space-3);
}

/* Multi-file Submit Styling */
.multi-file-submit {
    margin-top: var(--space-6);
    padding: var(--space-4);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
}

.submit-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
    gap: var(--space-3);
}

.submit-override {
    margin-top: var(--space-3);
    text-align: center;
}

.submit-override a {
    color: var(--accent-blue);
    text-decoration: none;
    font-size: var(--font-size-sm);
}

.submit-override a:hover {
    text-decoration: underline;
}

/* Loading Section Styling */
.loading-section {
    text-align: center;
    padding: var(--space-12);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--gray-200);
    border-top: 4px solid var(--accent-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--space-4);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Error Section Styling */
.error-section {
    text-align: center;
    padding: var(--space-8);
}

.error-content {
    max-width: 600px;
    margin: 0 auto;
}

.error-icon {
    font-size: 3rem;
    margin-bottom: var(--space-4);
}

.error-message {
    margin-bottom: var(--space-4);
    color: var(--accent-red);
    font-size: var(--font-size-lg);
}

/* Guided Flow Section Styling */
.guided-flow-section {
    text-align: center;
    padding: var(--space-8);
}

.guided-flow-content {
    max-width: 600px;
    margin: 0 auto;
}

.guided-flow-icon {
    font-size: 3rem;
    margin-bottom: var(--space-4);
}

.guided-flow-actions {
    margin-top: var(--space-6);
    display: flex;
    gap: var(--space-3);
    justify-content: center;
    flex-wrap: wrap;
}

/* Filter Controls Styling */
.filter-controls {
    margin-bottom: var(--space-6);
}

.filter-row {
    margin-bottom: var(--space-4);
}

.filter-group {
    margin-bottom: var(--space-3);
}

.filter-group label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: 500;
}





.filter-actions {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-4);
    flex-wrap: wrap;
}

.filter-summary {
    margin-top: var(--space-3);
    text-align: center;
    color: var(--gray-600);
}

/* Controls Styling */
.controls {
    margin-bottom: var(--space-6);
}

.control-group {
    margin-bottom: var(--space-3);
}

.control-group label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: 500;
}

/* Table Styling */
.table-container {
    overflow-x: auto;
    margin-bottom: var(--space-6);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

th, td {
    padding: var(--space-3);
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--gray-700);
}

tr:hover {
    background: var(--gray-50);
}

/* Data Freshness Styling */
.data-freshness {
    margin-bottom: var(--space-4);
    text-align: center;
}

/* Footer Note Styling */
.footer-note {
    margin-top: var(--space-6);
    text-align: center;
}

/* Responsive Table */
@media (max-width: 768px) {
    table {
        font-size: var(--font-size-xs);
    }
    
    th, td {
        padding: var(--space-2);
    }
    
    .file-details,
    .submit-info {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .filter-actions {
        flex-direction: column;
    }
    
    .guided-flow-actions {
        flex-direction: column;
        align-items: center;
    }
}

/* Additional Utility Classes */
.hidden {
    display: none !important;
}

/* Enhanced Button Variants */
.material-btn-download {
    background: linear-gradient(135deg, var(--accent-green) 0%, var(--accent-green-light) 100%);
    color: var(--white);
    box-shadow: var(--shadow-sm);
}

.material-btn-download:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

/* Enhanced Card Variants */
.material-card.highlighted {
    border: 2px solid var(--accent-blue);
    box-shadow: var(--shadow-lg);
}

.material-card.highlighted:hover {
    box-shadow: var(--shadow-xl);
}

/* Enhanced Progress Bar */
.material-progress.animated .material-progress-bar {
    background: linear-gradient(90deg, var(--accent-blue) 0%, var(--accent-purple) 50%, var(--accent-blue) 100%);
    background-size: 200% 100%;
    animation: progressShimmer 2s ease-in-out infinite;
}

@keyframes progressShimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Enhanced Alert Variants */
.material-alert.with-icon {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.material-alert.with-icon::before {
    font-size: 1.5rem;
}

/* Enhanced Grid Variants */
.material-grid.centered {
    justify-items: center;
}

.material-grid.align-center {
    align-items: center;
}

/* Enhanced Typography Variants */
.material-typography-gradient {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.material-typography-shadow {
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Enhanced Animation Variants */
.material-bounce-in {
    animation: bounceIn 0.6s ease-out;
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

/* Print Styles */
@media print {
    .material-card {
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }
    
    .material-btn {
        display: none;
    }
    
    .language-toggle {
        display: none;
    }
}

/* App Header - Fixed at top */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: var(--space-4) var(--space-6);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    flex-wrap: nowrap;
    gap: var(--space-3);
    height: auto;
    min-height: 60px;
}

/* Language toggle positioning fix */
.language-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    flex-shrink: 0;
}

.header-left {
    display: flex;
    align-items: center;
    flex: 1;
    min-width: 0;
}

.header-logo {
    margin: 0;
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--accent-blue);
    text-decoration: none;
    transition: color 0.2s ease;
}

.header-logo:hover {
    color: var(--accent-blue-dark);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-shrink: 0;
}

.app-header .language-toggle {
    margin: 0;
}

/* Adjust main container to account for fixed header */
.material-container {
    padding-top: 80px;
}

/* Additional body padding for fixed header */
body {
    padding-top: 0;
    margin: 0;
}

/* Responsive header adjustments */
@media (max-width: 768px) {
    .app-header {
        padding: var(--space-3) var(--space-4);
        gap: var(--space-2);
    }
    
    .header-left {
        flex: 1;
        min-width: 0;
    }
    
    .header-logo {
        font-size: var(--font-size-lg);
    }
    
    .header-right {
        gap: var(--space-3);
        flex-shrink: 0;
        align-items: center;
    }
    
    .burger-menu {
        min-width: 40px;
        min-height: 40px;
        padding: var(--space-2);
    }
    
    .language-toggle {
        gap: var(--space-1);
    }
    
    .language-toggle .lang-btn {
        min-width: 36px !important;
        height: 36px !important;
        padding: var(--space-1) var(--space-2) !important;
        font-size: 0.75rem !important;
        font-weight: 500;
    }
    
    .language-toggle .material-btn {
        min-width: 36px !important;
        height: 36px !important;
        font-size: var(--font-size-xs) !important;
        padding: var(--space-1) var(--space-2) !important;
    }
}

@media (max-width: 480px) {
    .app-header {
        padding: var(--space-2) var(--space-3);
        gap: var(--space-2);
    }
    
    .header-left {
        flex: 1;
        min-width: 0;
    }
    
    .header-logo {
        font-size: var(--font-size-md);
    }
    
    .header-right {
        gap: var(--space-2);
        flex-shrink: 0;
    }
    
    .burger-menu {
        min-width: 36px;
        min-height: 36px;
        padding: var(--space-1);
    }
    
    .language-toggle .lang-btn {
        min-width: 32px !important;
        height: 32px !important;
        padding: var(--space-1) !important;
        font-size: 0.7rem !important;
    }
    
    .language-toggle {
        display: flex;
        align-items: center;
        gap: var(--space-1);
    }
}

@media (max-width: 360px) {
    .app-header {
        padding: var(--space-1) var(--space-2);
        gap: var(--space-1);
    }
    
    .header-logo {
        font-size: var(--font-size-sm);
    }
    
    .header-right {
        gap: var(--space-1);
    }
    
    .burger-menu {
        min-width: 32px;
        min-height: 32px;
        padding: 6px;
    }
    
    .language-toggle .lang-btn {
        min-width: 28px !important;
        height: 28px !important;
        padding: 4px !important;
        font-size: 0.65rem !important;
    }
    
    .language-toggle {
        display: flex;
        align-items: center;
        gap: var(--space-1);
    }
}

/* Calculation Breakdown Styles */
.calculation-breakdown-row {
    background-color: #f8f9fa;
    border-left: 4px solid #007bff;
}

.calculation-breakdown {
    padding: 20px;
    background-color: white;
    border-radius: 8px;
    margin: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.calculation-breakdown h5 {
    margin: 0 0 15px 0;
    color: #333;
    font-size: 16px;
    font-weight: 600;
}

.breakdown-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.breakdown-item {
    padding: 10px;
    background-color: #f8f9fa;
    border-radius: 6px;
    border-left: 3px solid #007bff;
}

.breakdown-item strong {
    color: #495057;
    display: block;
    margin-bottom: 5px;
}

.calculation-formula {
    background-color: #e3f2fd;
    padding: 15px;
    border-radius: 6px;
    border-left: 3px solid #2196f3;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.5;
}

.calculation-formula strong {
    color: #1976d2;
    display: block;
    margin-bottom: 8px;
}

/* Row expansion styles */
tr.expanded {
    background-color: #e3f2fd !important;
}

tr.expanded:hover {
    background-color: #bbdefb !important;
}

/* Make table rows more interactive */
#recommendationsTable tbody tr:not(.calculation-breakdown-row):hover {
    background-color: #f5f5f5;
    transition: background-color 0.2s ease;
}

#recommendationsTable tbody tr:not(.calculation-breakdown-row) {
    transition: background-color 0.2s ease;
}

/* Click hint styles */
.click-hint {
    font-size: 12px;
    color: #666;
    font-weight: normal;
    margin-left: 8px;
    opacity: 0.8;
}

.click-hint:hover {
    opacity: 1;
}