:root {
    --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --text-color: #334155;
    --header-bg: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    --sidebar-bg: #ffffff;
    --sidebar-border: #e2e8f0;
    --sidebar-link: #64748b;
    --sidebar-hover-bg: #f1f5f9;
    --sidebar-hover-text: #334155;
    --sidebar-active-bg: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    --sidebar-active-text: #1d4ed8;
    --sidebar-active-border: #3b82f6;
    --progress-bg: #d1fae5;
    --progress-check: #10b981;
    --section-bg: #ffffff;
    --section-border: #f1f5f9;
    --section-title: #1e293b;
    --section-text: #475569;
    --code-title-bg: #374151;
    --code-title-text: #d1d5db;
    --code-bg: #1f2937;
    --code-text: #f9fafb;
    --copy-btn-bg: #4b5563;
    --copy-btn-hover: #6b7280;
    --footer-bg: #1e293b;
    --footer-text: #94a3b8;
}

.dark-theme {
    --bg-gradient: linear-gradient(135deg, #1e1e2e 0%, #181825 100%);
    --text-color: #cdd6f4;
    --header-bg: linear-gradient(135deg, #111827 0%, #1e293b 100%);
    --sidebar-bg: #181825;
    --sidebar-border: #2e2e3e;
    --sidebar-link: #94a3b8;
    --sidebar-hover-bg: #2e2e3e;
    --sidebar-hover-text: #ffffff;
    --sidebar-active-bg: linear-gradient(135deg, #374151 0%, #1e293b 100%);
    --sidebar-active-text: #a6e3a1;
    --sidebar-active-border: #89b4fa;
    --progress-bg: #064e3b;
    --progress-check: #a6e3a1;
    --section-bg: #1e1e2e;
    --section-border: #2e2e3e;
    --section-title: #f1f5f9;
    --section-text: #cdd6f4;
    --code-title-bg: #2e2e3e;
    --code-title-text: #cbd5e1;
    --code-bg: #111827;
    --code-text: #f9fafb;
    --copy-btn-bg: #374151;
    --copy-btn-hover: #4b5563;
    --footer-bg: #111827;
    --footer-text: #94a3b8;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--bg-gradient);
    min-height: 100vh;
}

/* Header Section */
header {
    background: var(--header-bg);
    color: white;
    padding: 3rem 2rem;
    text-align: center;
    position: relative;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
}

header p {
    font-size: 1.2rem;
    opacity: 0.9;
}


#theme-toggle {
    margin-top: 1rem;
    background: var(--sidebar-active-border);
    color: white;
    border: none;
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
    cursor: pointer;
    border-radius: 0.4rem;
    transition: background 0.3s ease;
}

#theme-toggle:hover {
    background: var(--sidebar-active-text);
    color: black;
}
.page {
 padding: auto;
 
}

/* Sidebar Toggle Button for Mobile */
.sidebar-toggle {
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 1000;
    background: #3b82f6;
    color: white;
    border: none;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    cursor: pointer;
    display: none; /* Initially hidden on desktop */
}

/* Sidebar Section */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100vh;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    padding: 1rem 0;
    overflow-y: auto;
    z-index: 999;
    transition: transform 0.3s ease;
}

/* Collapsible Group Title */
.sidebar-title {
    font-size: 18px;
    font-weight: bold;
    color: var(--sidebar-active-text);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    padding: 12px 20px;
    margin-bottom: 5px;
    transition: background 0.3s ease;
}

.sidebar-title:hover {
    background: var(--sidebar-hover-bg);
}

/* Arrow Icon */
.arrow {
    font-size: 12px;
    margin-left: auto;
    transition: transform 0.3s ease;
    color: var(--sidebar-link);
}

/* Collapsible Links */
.sidebar-links {
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.3s ease;
    padding-left: 10px;
}

.sidebar-links.open {
    max-height: 1000px;
}

/* Sidebar Links */
.sidebar a {
    display: block;
    padding: 10px 30px;
    color: var(--sidebar-link);
    text-decoration: none;
    border-left: 4px solid solid transparent;
    transition: all 0.3s;
}

.sidebar a:hover {
    background: var(--sidebar-hover-bg);
    color: var(--sidebar-hover-text);
}

.sidebar a.active {
    background: var(--sidebar-active-bg);
    color: var(--sidebar-active-text);
    border-left: 4px solid var(--sidebar-active-border);
    font-weight: 600;
}

/* Collapsed Arrow */
.sidebar-title.collapsed .arrow {
    transform: rotate(-90deg);
}

/* Main Content Wrapper */
main {
    margin-left: 280px;
    padding: 1rem;
    max-width: 1000px;
    margin-right: auto;
}

/* Main Sections */
section {
    background: var(--section-bg);
    margin-bottom: 2rem;
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--section-border);
    animation: fadeIn 0.6s ease-out;
}

section h2 {
    font-size: 1.8rem;
    color: var(--section-title);
    margin-bottom: 1rem;
}

/* Code Blocks Styling */
.code-title {
    background: var(--code-title-bg);
    color: var(--code-title-text);
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: 0.5rem 0.5rem 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

pre {
    background: var(--code-bg);
    color: var(--code-text);
    padding: 2rem;
    border-radius: 0 0 0.5rem 0.5rem;
    font-family: 'Fira Code', monospace;
    overflow-x: auto;
    position: relative;
}

.copy-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background: var(--copy-btn-bg);
    color: #fff;
    border: none;
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.copy-btn:hover {
    background: var(--copy-btn-hover);
}

/* Footer Section */
footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    text-align: center;
    padding: 2rem;
    margin-left: 280px;
}

/*
* Responsive Design Breakpoints
* - Desktop: > 1280px
* - Tablet: 1025px - 1280px
* - Mobile: < 1024px
*/

/* Tablet View (1025px to 1280px) */
@media(max-width: 1280px) {
    main,
    footer {
        /* Reduce the left margin to make space for the sidebar on tablets */
        margin-left: 220px;
    }

    .sidebar {
        /* Make the sidebar slightly narrower on tablets */
        width: 220px;
    }
}

/* Mobile View (up to 1024px) */
@media(max-width: 1024px) {
    /* Show sidebar toggle on smaller screens */
    .sidebar-toggle {
        display: block;
    }

    /* Hide sidebar by default on smaller screens */
    .sidebar {
        transform: translateX(-100%);
    }

    /* Show sidebar when 'open' class is added by JavaScript */
    .sidebar.open {
        transform: translateX(0);
    }

    /* Adjust main content and footer margins to fill the screen */
    main,
    footer {
        margin-left: 0;
    }
}

/* Fade-in Animation for Sections */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}