/* ============================================
   Sales Slicer PoC - Stylesheet
   Modern, responsive design with gradient accents
   ============================================ */

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

:root {
    /* Primary Colors */
    --primary-color: #667eea;
    --primary-dark: #5568d3;
    --secondary-color: #764ba2;
    
    /* Status Colors */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    
    /* Neutral Colors */
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    flex: 1;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: var(--spacing-xl) var(--spacing-lg);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
}

.header-content {
    text-align: center;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.logo i {
    font-size: 2.5rem;
}

.logo h1 {
    font-size: 2.5rem;
    font-weight: 700;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
}

/* Navigation Tabs */
.nav-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    background: var(--card-bg);
    padding: var(--spacing-sm);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.tab-btn {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.tab-btn:hover {
    background: var(--bg-color);
    color: var(--primary-color);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

/* Card */
.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
}

.card h2 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.card h2 i {
    color: var(--primary-color);
}

.card-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

/* Upload Form */
.upload-form {
    margin-bottom: var(--spacing-lg);
}

.file-input-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.file-input-wrapper {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all 0.3s ease;
    cursor: pointer;
}

.file-input-wrapper:hover {
    border-color: var(--primary-color);
    background: var(--bg-color);
}

.file-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
}

.file-label i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

input[type="file"] {
    display: block;
    width: 100%;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
}

.file-info {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.file-name {
    display: block;
    font-weight: 500;
}

.file-size {
    display: block;
    color: var(--text-secondary);
}

/* Buttons */
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    width: 100%;
    padding: var(--spacing-md);
    font-size: 1.1rem;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--bg-color);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    width: 100%;
    padding: var(--spacing-md);
    font-size: 1.1rem;
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Divider */
.divider {
    text-align: center;
    margin: var(--spacing-lg) 0;
    position: relative;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border-color);
}

.divider span {
    position: relative;
    background: var(--card-bg);
    padding: 0 var(--spacing-sm);
    color: var(--text-secondary);
    font-weight: 600;
}

/* Requirements */
.requirements {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-color);
    border-radius: var(--radius-lg);
}

.requirements h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.requirement-item h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.requirement-item ul {
    list-style: none;
    padding: 0;
}

.requirement-item li {
    padding: 0.25rem 0;
    color: var(--text-secondary);
}

.requirement-item li::before {
    content: "✓ ";
    color: var(--success-color);
    font-weight: bold;
    margin-right: 0.5rem;
}

/* Preview Stats */
.preview-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    background: var(--bg-color);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.stat-card i {
    font-size: 2rem;
    color: var(--primary-color);
}

.stat-content h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.stat-content p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Progress */
.progress-section {
    margin-top: var(--spacing-lg);
}

.progress-bar {
    width: 100%;
    height: 12px;
    background: var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    margin: var(--spacing-md) 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.progress-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.step {
    text-align: center;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    background: var(--bg-color);
    opacity: 0.5;
    transition: all 0.3s ease;
}

.step.active {
    opacity: 1;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    transform: scale(1.05);
}

.step.completed {
    opacity: 1;
    background: var(--success-color);
    color: white;
}

.step i {
    display: block;
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.step span {
    font-size: 0.875rem;
    font-weight: 600;
}

/* Dashboard */
.dashboard-content {
    animation: fadeIn 0.5s ease;
}

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

.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.summary-card {
    background: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: transform 0.3s ease;
}

.summary-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.card-details h3 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.card-details p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Health Cards */
.health-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.health-card {
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    color: white;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
}

.health-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.health-card i {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.health-card h3 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
}

.health-value {
    display: block;
    font-size: 1.1rem;
    opacity: 0.9;
    margin-top: var(--spacing-xs);
}

.health-card.healthy {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.health-card.medium {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.health-card.high-risk {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

/* Charts */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.chart-card {
    min-height: 400px;
}

.chart-card h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.chart-card canvas {
    max-height: 350px;
}

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.metric-card {
    background: var(--bg-color);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
}

.metric-card h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.metric-card p {
    color: var(--text-secondary);
    font-weight: 600;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
    margin-top: var(--spacing-md);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.data-table thead {
    background: var(--bg-color);
}

.data-table th {
    padding: var(--spacing-sm);
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
}

.data-table td {
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.data-table tbody tr {
    transition: background-color 0.2s ease;
}

.data-table tbody tr:hover {
    background: var(--bg-color);
}

/* Health Status Badges */
.health-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-block;
}

.health-badge.healthy {
    background: #d1fae5;
    color: #065f46;
}

.health-badge.medium {
    background: #fed7aa;
    color: #92400e;
}

.health-badge.high-risk {
    background: #fee2e2;
    color: #991b1b;
}

/* Priority Badge */
.priority-badge {
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 700;
    display: inline-block;
}

.priority-high {
    background: #fee2e2;
    color: #991b1b;
}

.priority-medium {
    background: #fed7aa;
    color: #92400e;
}

.priority-low {
    background: #e0e7ff;
    color: #3730a3;
}

/* Table Controls */
.table-controls {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.search-input {
    flex: 1;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
}

.filter-select {
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    background: var(--card-bg);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.pagination button {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.pagination button:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.pagination button.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Export Buttons */
.export-buttons {
    display: flex;
    gap: var(--spacing-xs);
}

/* Loading */
.loading {
    text-align: center;
    padding: var(--spacing-xl);
}

.loading i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

/* Error Section */
.error-section {
    text-align: center;
    padding: var(--spacing-xl);
}

.error-card {
    max-width: 500px;
    margin: 0 auto;
}

.error-card i {
    font-size: 4rem;
    color: var(--danger-color);
    margin-bottom: var(--spacing-md);
}

/* Notification */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    z-index: 1000;
    display: none;
    max-width: 400px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.notification.success {
    background: var(--success-color);
    color: white;
}

.notification.error {
    background: var(--danger-color);
    color: white;
}

.notification.info {
    background: var(--info-color);
    color: white;
}

/* Footer */
.footer {
    background: var(--card-bg);
    padding: var(--spacing-md);
    text-align: center;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-xl);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-sm);
    }
    
    .header {
        padding: var(--spacing-lg);
    }
    
    .logo h1 {
        font-size: 1.75rem;
    }
    
    .logo i {
        font-size: 1.75rem;
    }
    
    .nav-tabs {
        flex-direction: column;
    }
    
    .file-input-group {
        grid-template-columns: 1fr;
    }
    
    .charts-grid {
        grid-template-columns: 1fr;
    }
    
    .summary-cards {
        grid-template-columns: 1fr;
    }
    
    .table-controls {
        flex-direction: column;
    }
    
    .notification {
        left: 20px;
        right: 20px;
        max-width: none;
    }
}

@media print {
    .nav-tabs,
    .export-buttons,
    .footer {
        display: none;
    }
}