/* Enhanced CSS with Dark Mode Support & Modern Features */

:root {
    /* Light theme colors */
    --primary-blue: #0066cc;
    --dark-blue: #003d7a;
    --light-blue: #4d9fff;
    --accent-orange: #ff6600;
    --light-gray: #f5f7fa;
    --medium-gray: #8c9ba5;
    --dark-gray: #2c3e50;
    --white: #ffffff;
    --error: #e74c3c;
    --success: #27ae60;
    --warning: #f39c12;
    --info: #3498db;
    
    /* Impact colors */
    --critical: #dc3545;
    --major: #fd7e14;
    --minor: #20c997;
    --maintenance: #6c757d;
    
    /* Background colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;
    
    /* Border colors */
    --border-light: #dee2e6;
    --border-medium: #ced4da;
    --border-dark: #adb5bd;
    
    /* Component colors */
    --card-bg: #ffffff;
    --card-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --card-shadow-hover: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Border radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

/* Dark theme */
[data-theme="dark"] {
    --primary-blue: #4d9fff;
    --dark-blue: #0066cc;
    --light-blue: #74b3ff;
    --accent-orange: #ff8533;
    --light-gray: #1a1d23;
    --medium-gray: #495057;
    --dark-gray: #f8f9fa;
    --white: #212529;
    --error: #ff6b6b;
    --success: #51cf66;
    --warning: #ffd43b;
    --info: #74c0fc;
    
    /* Background colors */
    --bg-primary: #212529;
    --bg-secondary: #2d3436;
    --bg-tertiary: #3d4147;
    --text-primary: #f8f9fa;
    --text-secondary: #adb5bd;
    --text-muted: #6c757d;
    
    /* Border colors */
    --border-light: #495057;
    --border-medium: #6c757d;
    --border-dark: #adb5bd;
    
    /* Component colors */
    --card-bg: #2d3436;
    --card-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.3);
    --card-shadow-hover: 0 0.5rem 1rem rgba(0, 0, 0, 0.4);
}

/* Auto theme based on system preference */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --primary-blue: #4d9fff;
        --dark-blue: #0066cc;
        --light-blue: #74b3ff;
        --accent-orange: #ff8533;
        --light-gray: #1a1d23;
        --medium-gray: #495057;
        --dark-gray: #f8f9fa;
        --white: #212529;
        --error: #ff6b6b;
        --success: #51cf66;
        --warning: #ffd43b;
        --info: #74c0fc;
        
        --bg-primary: #212529;
        --bg-secondary: #2d3436;
        --bg-tertiary: #3d4147;
        --text-primary: #f8f9fa;
        --text-secondary: #adb5bd;
        --text-muted: #6c757d;
        
        --border-light: #495057;
        --border-medium: #6c757d;
        --border-dark: #adb5bd;
        
        --card-bg: #2d3436;
        --card-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.3);
        --card-shadow-hover: 0 0.5rem 1rem rgba(0, 0, 0, 0.4);
    }
}

/* Base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color var(--transition-normal), color var(--transition-normal);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Layout */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Enhanced Header */
.header {
    background: var(--card-bg);
    box-shadow: var(--card-shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background-color var(--transition-normal);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) 0;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--primary-blue);
    text-decoration: none;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: 2px solid var(--border-medium);
    border-radius: var(--radius-lg);
    padding: var(--space-sm);
    cursor: pointer;
    color: var(--text-primary);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
}

.theme-toggle:hover {
    border-color: var(--primary-blue);
    background-color: var(--primary-blue);
    color: var(--white);
}

/* Enhanced Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-weight: 500;
    text-decoration: none;
    border: none;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--dark-blue);
    transform: translateY(-1px);
    box-shadow: var(--card-shadow-hover);
}

.btn-secondary {
    background: var(--card-bg);
    color: var(--primary-blue);
    border: 1px solid var(--primary-blue);
}

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

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-medium);
}

.btn-outline:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-blue);
}

/* Impact Badges */
.impact-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.impact-critical {
    background: var(--critical);
    color: white;
}

.impact-major {
    background: var(--major);
    color: white;
}

.impact-minor {
    background: var(--minor);
    color: white;
}

.impact-maintenance {
    background: var(--maintenance);
    color: white;
}

/* Enhanced Search */
.search-container {
    position: relative;
    flex: 1;
    max-width: 500px;
}

.search-input {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    background: var(--card-bg);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(77, 159, 255, 0.1);
}

.search-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card-bg);
    border: 1px solid var(--border-light);
    border-top: none;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    box-shadow: var(--card-shadow);
    z-index: 10;
    max-height: 300px;
    overflow-y: auto;
}

.suggestion-item {
    padding: var(--space-sm) var(--space-md);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    border-bottom: 1px solid var(--border-light);
}

.suggestion-item:hover {
    background: var(--bg-secondary);
}

.suggestion-item:last-child {
    border-bottom: none;
}

/* Enhanced Cards */
.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    padding: var(--space-lg);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-light);
}

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

.card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    line-height: 1.4;
}

.card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-bottom: var(--space-sm);
}

.card-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-light);
    margin-top: var(--space-md);
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* Analytics Dashboard */
.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.chart-container {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-light);
}

.chart-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

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

.stat-card {
    background: var(--card-bg);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    text-align: center;
    border: 1px solid var(--border-light);
    transition: all var(--transition-fast);
}

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

.stat-value {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: var(--space-xs);
    line-height: 1;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.stat-change {
    font-size: 0.75rem;
    margin-top: var(--space-xs);
    font-weight: 500;
}

.stat-change.positive {
    color: var(--success);
}

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

/* Notifications */
.notification {
    background: var(--info);
    color: white;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--card-shadow);
}

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

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

.notification.warning {
    background: var(--warning);
}

.notification-close {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    font-size: 1.2rem;
    padding: var(--space-xs);
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.notification-close:hover {
    opacity: 1;
}

/* Enhanced Filters */
.filters {
    background: var(--card-bg);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    margin-bottom: var(--space-xl);
    border: 1px solid var(--border-light);
}

.filter-row {
    display: flex;
    gap: var(--space-md);
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-md);
}

.filter-row:last-child {
    margin-bottom: 0;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    min-width: 150px;
}

.filter-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.filter-select {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    background: var(--card-bg);
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color var(--transition-fast);
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary-blue);
}

/* Loading States */
.loading {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.loading::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-light);
    border-top: 2px solid var(--primary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: var(--space-sm);
}

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

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-tertiary) 50%, var(--bg-secondary) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    border-radius: var(--radius-md);
}

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

.skeleton-text {
    height: 1rem;
    margin-bottom: var(--space-sm);
}

.skeleton-title {
    height: 1.5rem;
    width: 70%;
    margin-bottom: var(--space-md);
}

/* Enhanced Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-xl);
    flex-wrap: wrap;
}

.pagination-btn {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border-medium);
    background: var(--card-bg);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 2.5rem;
    text-align: center;
}

.pagination-btn:hover:not(:disabled) {
    background: var(--primary-blue);
    color: var(--white);
    border-color: var(--primary-blue);
}

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

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

/* Utility Classes */
.hidden { display: none !important; }
.visible { display: block !important; }
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-primary { color: var(--primary-blue); }
.text-success { color: var(--success); }
.text-error { color: var(--error); }
.text-warning { color: var(--warning); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

/* Responsive Design */
@media (max-width: 1024px) {
    .analytics-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-sm);
    }
    
    .nav {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .nav-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .filter-row {
        flex-direction: column;
        align-items: stretch;
    }
    
    .card-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .card-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }
    
    .card-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .pagination {
        justify-content: center;
        gap: var(--space-xs);
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-value {
        font-size: 2rem;
    }
    
    .card {
        padding: var(--space-md);
    }
    
    .card-title {
        font-size: 1.125rem;
    }
}

/* Print Styles */
@media print {
    .header,
    .filters,
    .pagination,
    .theme-toggle,
    .nav-actions {
        display: none !important;
    }
    
    .card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #000;
        margin-bottom: var(--space-lg);
    }
    
    body {
        background: white !important;
        color: black !important;
    }
}

/* Focus Styles for Accessibility */
.btn:focus,
.search-input:focus,
.filter-select:focus,
.theme-toggle:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --card-shadow: 0 0 0 1px var(--border-dark);
        --card-shadow-hover: 0 0 0 2px var(--primary-blue);
    }
}

/* Enhanced Timestamp Styles */
.scraped-timestamp {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border-color-light);
    cursor: help;
    transition: all 0.2s ease;
}

.scraped-timestamp:hover {
    background: var(--bg-primary);
    color: var(--text-primary);
    border-color: var(--border-color);
    transform: translateY(-1px);
}

.scraped-timestamp::before {
    content: "⏰";
    font-size: 0.9em;
    opacity: 0.7;
}

/* Release date and time formatting */
.release-date {
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
}

.card-meta .release-date {
    background: var(--bg-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border-color-light);
}

/* Improve card actions layout */
.card-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color-light);
    flex-wrap: wrap;
}

.card-actions .btn {
    flex-shrink: 0;
}

.card-actions .scraped-timestamp {
    flex-shrink: 1;
    min-width: 0;
}

/* Mobile responsiveness for timestamps */
@media (max-width: 768px) {
    .card-actions {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }
    
    .scraped-timestamp {
        text-align: center;
        justify-content: center;
    }
    
    .card-meta {
        flex-wrap: wrap;
        gap: 0.25rem;
    }
    
    .card-meta .release-date {
        font-size: 0.75rem;
        padding: 0.2rem 0.4rem;
    }
}

/* Tooltip enhancement for detailed timestamps */
.scraped-timestamp[title]:hover::after {
    content: attr(title);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    white-space: nowrap;
    z-index: 1000;
    margin-bottom: 0.25rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    pointer-events: none;
}

.scraped-timestamp {
    position: relative;
}

/* Dark mode adjustments for timestamps */
[data-theme="dark"] .scraped-timestamp {
    background: rgba(255,255,255,0.05);
    border-color: rgba(255,255,255,0.1);
}

[data-theme="dark"] .scraped-timestamp:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.2);
}