:root {
    --primary-color: #4285F4;
    --secondary-color: #34A853;
    --background-color: #0d1117;
    --card-bg: #161b22;
    --text-color: #c9d1d9;
    --highlight-color: #58a6ff;
    --border-color: #30363d;
    --tooltip-bg: #E3F2FD;
    --tooltip-text: #0D47A1;
}

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

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

/* Layout */
body {
    display: flex;
    overflow-x: hidden;
}

/* Sidebar */
.sidebar {
    width: 250px;
    height: 100vh;
    background-color: var(--card-bg);
    border-right: 1px solid var(--border-color);
    position: fixed;
    left: -250px;
    top: 0;
    transition: left 0.3s ease-in-out;
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

.sidebar.active {
    left: 0;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    padding: 1rem 0;
    overflow-y: auto;
}

.nav-section-header {
    padding: 1.5rem 1.5rem 0.5rem 1.5rem;
    text-transform: uppercase;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--highlight-color);
    letter-spacing: 1px;
    margin-top: 0.5rem;
    border-top: 1px solid rgba(48, 54, 61, 0.4);
}

.nav-section-header:first-of-type {
    margin-top: 0;
    border-top: none;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 0.8rem 1.5rem;
    color: var(--text-color);
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: all 0.2s;
}

.nav-item:hover,
.nav-item.active {
    background-color: rgba(66, 133, 244, 0.1);
    border-left-color: var(--primary-color);
    color: #fff;
}

.step-num {
    font-size: 0.8rem;
    color: #8b949e;
    margin-right: 10px;
    font-family: monospace;
}

/* Menu Toggle */
.menu-toggle {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1001;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 5px;
    transition: left 0.3s ease-in-out;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: #fff;
    border-radius: 2px;
}

.sidebar.active+.menu-toggle,
/* If adjacent */
.menu-toggle.moved {
    /* JS will toggle this class */
    left: 270px;
}

/* Main Content Wrapper */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Main Content Adjustment */
.hero {
    margin-top: 0;
    padding-top: 6rem;
    /* Space for toggle */
    width: 100%;
}

.container {
    width: 100%;
    margin: 0 auto;
    transition: margin-left 0.3s ease-in-out;
}

/* Desktop: Sidebar visible by default logic */
@media (min-width: 1024px) {
    .sidebar {
        left: 0;
    }

    .menu-toggle {
        display: none;
        /* Hide toggle on large screens if we want persistent sidebar */
    }

    .main-content {
        margin-left: 250px;
        /* Push content using margin now */
    }

    .hero {
        padding-top: 5rem;
    }
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 3rem 1rem 3rem 1rem;
    /* Adjust padding */
    background: radial-gradient(circle at top, #1f293a, var(--background-color));
    width: 100%;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    background: linear-gradient(90deg, #fff, #8b949e);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.learning-intro {
    background-color: rgba(22, 27, 34, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: left;
    max-width: 800px;
    margin: 0 auto;
    display: grid;
    gap: 2rem;
}

.intro-block h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.intro-block ul {
    list-style: none;
}

.intro-block li {
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.highlight-icon {
    color: var(--secondary-color);
    margin-right: 8px;
    font-weight: bold;
}

.intro-block p {
    color: #8b949e;
}

/* Container */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1rem;
    transition: margin-left 0.3s ease-in-out;
}

/* 
   Ensure sections can be reordered using flexbox.
   We target the main element's direct container if applicable, 
   but looking at index.html, <main class="container"> allows us 
   to treat this .container as the flex parent for sections.
*/
main.container {
    display: flex;
    flex-direction: column;
}

#troubleshoot {
    order: 9999;
    /* Force to bottom */
}

/* Sections */
.step-section {
    margin-bottom: 4rem;
    padding: 2rem;
    background-color: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.step-header {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.step-header h2 {
    color: #fff;
    font-size: 1.8rem;
    margin-right: 1rem;
}

/* Tooltips */
.tooltip-container {
    position: relative;
    cursor: help;
}

.info-icon {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 24px;
    height: 24px;
    background-color: var(--highlight-color);
    color: var(--background-color);
    border-radius: 50%;
    font-weight: bold;
    font-size: 0.9rem;
}

.tooltip {
    visibility: hidden;
    width: 250px;
    background-color: var(--tooltip-bg);
    color: var(--tooltip-text);
    text-align: left;
    border-radius: 6px;
    padding: 10px;
    position: absolute;
    z-index: 10;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    opacity: 0;
    transition: opacity 0.3s, transform 0.3s;
    font-size: 0.9rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.tooltip-container:hover .tooltip {
    visibility: visible;
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.tooltip::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: var(--tooltip-bg) transparent transparent transparent;
}

/* Code Blocks */
.code-block {
    background-color: #0d1117;
    border-radius: 6px;
    padding: 1rem;
    margin: 1rem 0;
    position: relative;
    overflow-x: auto;
    border: 1px solid var(--border-color);
}

code {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9rem;
    color: #e6edf3;
}

.copy-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: var(--border-color);
    color: #c9d1d9;
    border: none;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: background 0.2s;
}

.copy-btn:hover {
    background-color: #8b949e;
    color: #fff;
}

/* Images */
.image-wrapper {
    margin: 2rem 0;
    text-align: center;
}

.image-wrapper img {
    max-width: 100%;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.caption {
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: #8b949e;
    font-style: italic;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    color: #8b949e;
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
}

/* FAQ / Troubleshooting */
.faq-item {
    background-color: #0d1117;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 0.8rem;
    overflow: hidden;
}

.faq-item summary {
    padding: 1rem;
    cursor: pointer;
    background-color: rgba(255, 255, 255, 0.02);
    transition: background 0.2s;
    list-style: none;
    /* Hide default triangle */
    font-weight: 500;
}

.faq-item summary:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item p {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    color: #8b949e;
    font-size: 0.95rem;
}
/* Wrapper for the expanded content (Added by Antigravity) */
.faq-body {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    color: #8b949e;
    font-size: 0.95rem;
}

.faq-body p {
    margin-bottom: 1rem;
    border-top: none; 
    padding: 0;
}

.faq-body p:last-child {
    margin-bottom: 0;
}

.faq-body strong {
    color: #e6edf3;
}