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

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #e6edf3;
    --text-secondary: #7d8590;
    --accent-primary: #238636;
    --accent-secondary: #58a6ff;
    --border-color: #30363d;
    --hover-bg: #30363d;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    --gradient-primary: linear-gradient(135deg, #238636, #58a6ff);
}

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

.container {
    display: flex;
    min-height: 100vh;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.1rem;
    color: white;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: bold;
}

.author-credit {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-style: italic;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    position: fixed;
    left: 0;
    top: 80px;
    height: calc(100vh - 80px);
    overflow-y: auto;
    padding: 2rem 0;
    transition: transform 0.3s ease;
    
    /* Hide scrollbar but keep functionality */
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* Internet Explorer 10+ */
}

/* Hide scrollbar for webkit browsers */
.sidebar::-webkit-scrollbar {
    display: none;
}

.sidebar-section {
    margin-bottom: 2rem;
}

.section-title {
    padding: 0 1.5rem 1rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.category {
    margin-bottom: 0.5rem;
}

.category-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.category-header:hover {
    background-color: var(--hover-bg);
    border-left-color: var(--accent-primary);
}

.category-header.active {
    background-color: var(--hover-bg);
    border-left-color: var(--accent-secondary);
}

.category-title {
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.category-icon {
    font-size: 1.2rem;
}

.expand-icon {
    transition: transform 0.3s ease;
    color: var(--text-secondary);
}

.expand-icon.expanded {
    transform: rotate(90deg);
}

.question-list {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background-color: var(--bg-tertiary);
}

.question-list.expanded {
    max-height: 500px;
}

.question-item {
    display: block;
    padding: 0.75rem 2rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.question-item:hover {
    color: var(--text-primary);
    background-color: var(--hover-bg);
    border-left-color: var(--accent-primary);
}

.question-item.active {
    color: var(--accent-secondary);
    background-color: var(--hover-bg);
    border-left-color: var(--accent-secondary);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 280px;
    margin-top: 80px;
    padding: 2rem;
    max-width: calc(100% - 280px);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.breadcrumb a {
    color: var(--accent-secondary);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.content-card {
    background-color: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.content-header {
    padding: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.content-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.content-meta {
    display: flex;
    gap: 2rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.content-body {
    padding: 2rem;
}

.answer-section {
    margin-bottom: 2rem;
}

.answer-section h2 {
    color: var(--accent-secondary);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.answer-section h3 {
    color: var(--text-primary);
    margin: 1.5rem 0 1rem;
}

.code-block {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1rem 0;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    position: relative;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.code-language {
    color: var(--accent-primary);
    font-size: 0.9rem;
    font-weight: 500;
}

.copy-btn {
    background-color: var(--accent-primary);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: background-color 0.3s ease;
}

.copy-btn:hover {
    background-color: #2ea043;
}

.code-content {
    color: #f8f8f2;
    line-height: 1.5;
    white-space: pre;   /* preserves newlines and spacing */
    font-family: 'Courier New', monospace;
}


.highlight {
    background-color: rgba(255, 215, 0, 0.2);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
}

.warning {
    background-color: rgba(255, 193, 7, 0.1);
    border-left: 4px solid #ffc107;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 4px;
}

.info {
    background-color: rgba(13, 202, 240, 0.1);
    border-left: 4px solid #0dcaf0;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 4px;
}

/* Homepage Specific */
.hero-section {
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
    border-radius: 12px;
    margin-bottom: 3rem;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.category-card {
    background-color: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(88, 166, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

.category-card:hover::before {
    left: 100%;
}

.category-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-secondary);
    box-shadow: 0 8px 25px rgba(88, 166, 255, 0.2);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.category-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.category-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Footer */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 2rem;
    margin-top: 4rem;
    margin-left: 280px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--accent-secondary);
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Coming Soon Styles */
.coming-soon {
    background-color: var(--accent-secondary);
    color: var(--bg-primary);
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    margin-left: 0.5rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.coming-soon-message {
    padding: 1rem 2rem;
    color: var(--text-secondary);
    font-style: italic;
    text-align: center;
}

.category-card.coming-soon-card {
    position: relative;
    opacity: 0.7;
}

.category-card.coming-soon-card::after {
    content: 'Coming Soon';
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: var(--accent-secondary);
    color: var(--bg-primary);
    font-size: 0.7rem;
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.category-card.coming-soon-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-secondary);
    box-shadow: 0 8px 25px rgba(88, 166, 255, 0.2);
}

.category-card.available-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-secondary);
    box-shadow: 0 8px 25px rgba(88, 166, 255, 0.2);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .sidebar {
        width: 250px;
    }
    
    .main-content {
        margin-left: 250px;
        max-width: calc(100% - 250px);
    }
    
    .footer {
        margin-left: 250px;
    }
    
    .categories-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 100%;
        z-index: 999;
    }
    
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        max-width: 100%;
        padding: 1rem;
    }
    
    .footer {
        margin-left: 0;
        padding: 1.5rem 1rem;
    }
    
    .header {
        padding: 1rem;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .logo-text {
        font-size: 1.3rem;
    }
    
    .author-credit {
        font-size: 0.8rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
        padding: 0 1rem;
    }
    
    .hero-section {
        padding: 3rem 1rem;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .category-card {
        padding: 1.5rem;
    }
    
    .footer-links {
        gap: 1rem;
    }
    
    .content-meta {
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: 0.5rem;
    }
    
    .hero-section {
        padding: 2rem 0.5rem;
        margin-bottom: 2rem;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .categories-grid {
        gap: 0.75rem;
    }
    
    .category-card {
        padding: 1rem;
    }
    
    .card-icon {
        font-size: 2.5rem;
    }
    
    .category-card h3 {
        font-size: 1.1rem;
    }
    
    .category-card p {
        font-size: 0.8rem;
    }
}



.stay-connected {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    margin: 2rem 0;
    text-align: center;
    box-shadow: var(--shadow);
}

.stay-connected h2 {
    margin-bottom: 1rem;
    color: var(--accent-secondary);
}

.stay-connected .cta-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.stay-connected a {
    display: inline-block;
    padding: 0.8rem 1.2rem;
    border-radius: 8px;
    text-decoration: none;
    background: var(--gradient-primary);
    color: white;
    font-weight: 500;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stay-connected a:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 18px rgba(88, 166, 255, 0.3);
}