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

:root {
    /* Light Mode Colors */
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --background: #f7fafc;
    --surface: #ffffff;
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --border-color: #e2e8f0;
    --shadow: rgba(0, 0, 0, 0.1);
    --success: #48bb78;
    --warning: #ed8936;
    --error: #f56565;
    --info: #4299e1;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* Dark Mode Colors */
body.dark-mode {
    --background: #1a202c;
    --surface: #2d3748;
    --text-primary: #f7fafc;
    --text-secondary: #cbd5e0;
    --border-color: #4a5568;
    --shadow: rgba(0, 0, 0, 0.3);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background var(--transition-base), color var(--transition-base);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: var(--spacing-lg) 0;
    box-shadow: 0 4px 6px var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo i {
    font-size: 2rem;
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 700;
}

.theme-toggle {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

/* Main Content */
.main-content {
    padding: var(--spacing-2xl) 0;
    min-height: calc(100vh - 200px);
}

/* Search Section */
.search-section {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--surface);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm) var(--spacing-lg);
    transition: all var(--transition-base);
}

.search-box:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.search-box i {
    color: var(--text-secondary);
    margin-right: var(--spacing-md);
}

.search-box input {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
}

.clear-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    display: none;
    transition: color var(--transition-fast);
}

.clear-btn:hover {
    color: var(--error);
}

.search-box input:not(:placeholder-shown) ~ .clear-btn {
    display: block;
}

.filter-box {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: var(--surface);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm) var(--spacing-lg);
}

.filter-box label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    font-weight: 600;
    white-space: nowrap;
}

.filter-box select {
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    outline: none;
    padding: var(--spacing-sm);
}

/* Stats Section */
.stats-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.stat-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    box-shadow: 0 2px 4px var(--shadow);
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px var(--shadow);
}

.stat-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.stat-info h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

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

/* Systems Grid */
.systems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.system-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 2px 4px var(--shadow);
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.system-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px var(--shadow);
    border-color: var(--primary-color);
}

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

.system-card-header h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
    flex: 1;
    margin-right: var(--spacing-md);
}

.favorite-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.25rem;
    padding: var(--spacing-sm);
    transition: all var(--transition-fast);
}

.favorite-btn:hover {
    color: var(--warning);
    transform: scale(1.2);
}

.favorite-btn.active {
    color: var(--warning);
}

.system-category {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.system-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.system-explanation {
    background: rgba(102, 126, 234, 0.1);
    border-left: 4px solid var(--primary-color);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-lg);
    font-size: 0.875rem;
    color: var(--text-primary);
}

.system-meta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.system-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.status-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.status-active {
    background: rgba(72, 187, 120, 0.2);
    color: var(--success);
}

.status-inactive {
    background: rgba(245, 101, 101, 0.2);
    color: var(--error);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 100%;
    transition: all var(--transition-base);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
    padding: var(--spacing-lg);
}

.modal.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background: var(--surface);
    border-radius: var(--radius-xl);
    max-width: 700px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transform: scale(0.9);
    transition: transform var(--transition-base);
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-header {
    padding: var(--spacing-xl);
    border-bottom: 2px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    color: var(--text-primary);
    font-size: 1.5rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--error);
}

.modal-body {
    padding: var(--spacing-xl);
}

.detail-section {
    margin-bottom: var(--spacing-xl);
}

.detail-section:last-child {
    margin-bottom: 0;
}

.detail-section h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.detail-grid {
    display: grid;
    gap: var(--spacing-md);
}

.detail-item {
    display: flex;
    gap: var(--spacing-md);
}

.detail-item strong {
    color: var(--text-primary);
    min-width: 100px;
}

.detail-item span {
    color: var(--text-secondary);
}

.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--text-secondary);
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

.btn-secondary {
    background: var(--surface);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    transition: all var(--transition-base);
}

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

/* No Results */
.no-results {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-secondary);
}

.no-results i {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.no-results h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

/* Notification */
.notification {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    background: var(--surface);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 24px var(--shadow);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    z-index: 2000;
    transform: translateY(100px);
    opacity: 0;
    transition: all var(--transition-base);
}

.notification.show {
    transform: translateY(0);
    opacity: 1;
}

.notification-success {
    border-left: 4px solid var(--success);
}

.notification-error {
    border-left: 4px solid var(--error);
}

.notification-info {
    border-left: 4px solid var(--info);
}

.notification i {
    font-size: 1.5rem;
}

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

.notification-error i {
    color: var(--error);
}

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

/* Footer */
.footer {
    background: var(--surface);
    border-top: 2px solid var(--border-color);
    padding: var(--spacing-xl) 0;
    text-align: center;
    color: var(--text-secondary);
    margin-top: var(--spacing-2xl);
}

/* Responsive Design */
@media (max-width: 768px) {
    .search-section {
        grid-template-columns: 1fr;
    }
    
    .stats-section {
        grid-template-columns: 1fr;
    }
    
    .systems-grid {
        grid-template-columns: 1fr;
    }
    
    .logo h1 {
        font-size: 1.25rem;
    }
    
    .modal-content {
        margin: var(--spacing-md);
    }
    
    .notification {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
        left: var(--spacing-md);
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--background);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: var(--radius-md);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}