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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8fafc;
}

/* Container Layout */
.container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Navigation */
.sidebar {
    width: 280px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}

.sidebar-header {
    padding: 2rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-menu {
    list-style: none;
    padding: 1rem 0;
}

.nav-menu li {
    margin: 0;
}

.nav-link {
    display: block;
    padding: 0.75rem 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border-left-color: rgba(255, 255, 255, 0.5);
}

.nav-link.active {
    background-color: rgba(255, 255, 255, 0.15);
    color: white;
    border-left-color: white;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 280px;
    padding: 2rem;
    max-width: calc(100vw - 280px);
}

/* Page Header */
.page-header {
    margin-bottom: 3rem;
    text-align: center;
    padding: 2rem 0;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.1rem;
    color: #718096;
    font-weight: 400;
}

/* Content Sections */
.content-section {
    margin-bottom: 3rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.content-section h2 {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem 2rem;
    font-size: 1.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0;
}

.content-card {
    padding: 2rem;
}

.content-card p {
    margin-bottom: 1rem;
    color: #4a5568;
    font-size: 1rem;
}

.content-card h3 {
    color: #2d3748;
    font-size: 1.25rem;
    font-weight: 600;
    margin: 2rem 0 1rem 0;
}

.content-card h4 {
    color: #2d3748;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

/* Lists */
.requirements-list,
.package-list,
.settings-list,
.tips-list {
    list-style: none;
    padding: 0;
}

.requirements-list li,
.settings-list li,
.tips-list li {
    padding: 0.75rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid #e2e8f0;
}

.requirements-list li:last-child,
.settings-list li:last-child,
.tips-list li:last-child {
    border-bottom: none;
}

.requirements-list i,
.settings-list i,
.tips-list i {
    color: #667eea;
    width: 20px;
    text-align: center;
}

.package-list li {
    padding: 0.5rem 0;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    background: #f7fafc;
    padding: 0.75rem;
    margin: 0.5rem 0;
    border-radius: 6px;
    border-left: 3px solid #667eea;
}

/* Installation Steps */
.installation-steps {
    counter-reset: step-counter;
    list-style: none;
    padding: 0;
}

.installation-steps li {
    counter-increment: step-counter;
    padding: 1rem 0;
    position: relative;
    padding-left: 3rem;
    border-bottom: 1px solid #e2e8f0;
}

.installation-steps li:last-child {
    border-bottom: none;
}

.installation-steps li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 600;
}

/* Feature Grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.feature-item {
    background: #f7fafc;
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: #667eea;
}

.feature-item i {
    font-size: 2rem;
    color: #667eea;
    margin-bottom: 1rem;
    display: block;
}

.feature-item h4 {
    color: #2d3748;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.feature-item p {
    color: #718096;
    font-size: 0.9rem;
    margin: 0;
}

/* Plugin List */
.plugin-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.plugin-item {
    background: #f7fafc;
    padding: 1.25rem;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
    text-align: center;
    transition: all 0.3s ease;
}

.plugin-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
    border-color: #667eea;
}

.plugin-item i {
    font-size: 1.75rem;
    color: #667eea;
    margin-bottom: 0.75rem;
    display: block;
}

.plugin-item h4 {
    color: #2d3748;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.plugin-item p {
    color: #718096;
    font-size: 0.85rem;
    margin: 0;
}

/* FAQ */
.faq-item {
    background: #f7fafc;
    padding: 1.5rem;
    margin: 1rem 0;
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

.faq-item h4 {
    color: #2d3748;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.faq-item p {
    color: #4a5568;
    margin: 0;
}

/* Changelog */
.changelog-list {
    margin: 1.5rem 0;
}

.version-item {
    background: #f7fafc;
    padding: 1.25rem;
    margin: 1rem 0;
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

.version-item h4 {
    color: #2d3748;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.version-item p {
    color: #4a5568;
    margin: 0;
}

/* Credits */
.credits-list {
    list-style: none;
    padding: 0;
}

.credits-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid #e2e8f0;
    color: #4a5568;
}

.credits-list li:last-child {
    border-bottom: none;
}

/* Screenshot Placeholders */
.screenshot-placeholder {
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    border: 2px dashed #cbd5e0;
    border-radius: 8px;
    padding: 3rem 2rem;
    text-align: center;
    margin: 2rem 0;
    color: #718096;
}

.screenshot-placeholder i {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
    color: #a0aec0;
}

.screenshot-placeholder p {
    font-size: 1rem;
    font-weight: 500;
    margin: 0;
}

/* External Links */
.external-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

.external-link:hover {
    color: #5a67d8;
    text-decoration: underline;
}

/* Code Elements */
code {
    background: #f1f5f9;
    color: #e53e3e;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9rem;
}

/* Tips Section */
.tips-section {
    background: linear-gradient(135deg, #fef5e7 0%, #fed7aa 100%);
    border: 1px solid #fbbf24;
}

.tips-section h2 {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.tips-section .content-card {
    background: rgba(255, 255, 255, 0.8);
}

/* Responsive Design */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        max-width: 100vw;
        padding: 1rem;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .plugin-list {
        grid-template-columns: 1fr;
    }
    
    .content-card {
        padding: 1.5rem;
    }
    
    .content-section h2 {
        padding: 1rem 1.5rem;
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: 0.5rem;
    }
    
    .content-card {
        padding: 1rem;
    }
    
    .page-header {
        padding: 1rem;
    }
    
    .page-header h1 {
        font-size: 1.75rem;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Custom Scrollbar */
.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}

/* Animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.content-section {
    animation: fadeInUp 0.6s ease-out;
}

/* Print Styles */
@media print {
    .sidebar {
        display: none;
    }
    
    .main-content {
        margin-left: 0;
        max-width: 100%;
    }
    
    .screenshot-placeholder {
        display: none;
    }
}