/* MCP Learning Guide - Styles */

/* ===== CSS Variables ===== */
:root {
    /* MCP Theme Colors */
    --primary: #7C3AED;          /* Purple */
    --primary-dark: #5B21B6;
    --primary-light: #9333EA;
    --secondary: #047857;        /* Green - darker for light bg contrast */
    --secondary-dark: #065F46;
    --secondary-light: #059669;

    /* Neutral Colors - LIGHT THEME */
    --bg-dark: #FFFFFF;
    --bg-darker: #F8FAFC;
    --bg-card: #F1F5F9;
    --bg-card-hover: #E2E8F0;
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #64748B;
    --border-color: #CBD5E1;

    /* Code Colors - Light theme */
    --code-bg: #F8FAFC;
    --code-text: #1E293B;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;

    /* Sizing */
    --max-width: 1200px;
    --sidebar-width: 280px;
    --content-max-width: 800px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--secondary);
}

/* ===== Landing Page ===== */
.landing-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-xl);
}

.landing-header {
    text-align: center;
    padding: var(--spacing-2xl) 0;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.logo-icon {
    font-size: 2.5rem;
    color: var(--primary);
}

.logo-text {
    font-size: 1.75rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: var(--spacing-2xl) 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-2xl);
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--text-primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Phases */
.phase {
    margin-bottom: var(--spacing-2xl);
}

.phase-header {
    margin-bottom: var(--spacing-lg);
}

.phase-number {
    display: inline-block;
    background: var(--primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

.phase-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.phase-description {
    color: var(--text-secondary);
}

/* Lesson Cards Grid */
.lessons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.lesson-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    display: block;
    color: inherit;
}

.lesson-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: translateY(-2px);
    color: inherit;
}

.lesson-card.capstone {
    border-color: var(--secondary);
    background: linear-gradient(135deg, var(--bg-card), rgba(16, 185, 129, 0.1));
}

.lesson-card.capstone:hover {
    border-color: var(--secondary-light);
}

.lesson-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    opacity: 0.5;
    margin-bottom: var(--spacing-sm);
}

.lesson-card.capstone .lesson-number {
    color: var(--secondary);
}

.lesson-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.lesson-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

.lesson-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Prerequisites */
.prerequisites {
    background: var(--bg-card);
    border-radius: 12px;
    padding: var(--spacing-xl);
    margin: var(--spacing-2xl) 0;
}

.prerequisites h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
}

.prerequisites ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-sm);
}

.prerequisites li {
    color: var(--text-secondary);
    padding-left: 1.5rem;
    position: relative;
}

.prerequisites li::before {
    content: ">";
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: bold;
}

/* CTA */
.cta {
    text-align: center;
    padding: var(--spacing-2xl) 0;
}

.start-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    font-size: 1.25rem;
    font-weight: 600;
    padding: var(--spacing-md) var(--spacing-2xl);
    border-radius: 8px;
    transition: all var(--transition-normal);
}

.start-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(124, 58, 237, 0.3);
    color: white;
}

/* Footer */
.landing-footer {
    text-align: center;
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
}

.footer-links {
    margin-top: var(--spacing-md);
}

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

/* ===== Lesson Page Layout ===== */
.lesson-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-darker);
    border-right: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
}

.sidebar-header {
    margin-bottom: var(--spacing-xl);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

.sidebar-logo:hover {
    color: var(--primary-light);
}

.lesson-info {
    background: var(--bg-card);
    border-radius: 8px;
    padding: var(--spacing-md);
}

.lesson-info-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.lesson-info-title {
    font-size: 1rem;
    font-weight: 600;
    margin-top: var(--spacing-xs);
}

.lesson-info-meta {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Progress Bar */
.progress-section {
    margin-bottom: var(--spacing-xl);
}

.progress-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.progress-bar {
    height: 6px;
    background: var(--bg-card);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 3px;
    transition: width var(--transition-normal);
}

/* Table of Contents */
.toc-section {
    margin-bottom: var(--spacing-xl);
}

.toc-title {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.toc-list {
    list-style: none;
}

.toc-item {
    margin-bottom: var(--spacing-xs);
}

.toc-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-radius: 6px;
    transition: all var(--transition-fast);
}

.toc-link:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.toc-link.active {
    background: var(--primary-dark);
    color: white;
    font-weight: 600;
}

.toc-link.active:hover {
    background: #4C1D95;
    color: white;
}

.toc-link.completed {
    color: var(--text-primary);
    font-weight: 500;
}

.toc-number {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    background: var(--bg-card);
    border-radius: 50%;
}

/* Completed step styling - checkmark in circle */
.toc-link.completed .toc-number {
    background: var(--secondary);
    color: transparent;
    position: relative;
}

.toc-link.completed .toc-number::after {
    content: "✓";
    position: absolute;
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
}

/* Active overrides completed - show white circle, no checkmark */
.toc-link.active .toc-number,
.toc-link.active.completed .toc-number {
    background: rgba(255, 255, 255, 0.25);
    color: white;
}

.toc-link.active .toc-number::after,
.toc-link.active.completed .toc-number::after {
    content: none;
}

/* All Lessons Navigation */
.all-lessons-section {
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-lg);
}

.all-lessons-title {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.all-lessons-list {
    list-style: none;
}

.all-lessons-item {
    margin-bottom: var(--spacing-xs);
}

.all-lessons-link {
    display: block;
    padding: var(--spacing-sm);
    color: var(--text-muted);
    font-size: 0.85rem;
    border-radius: 6px;
    transition: all var(--transition-fast);
}

.all-lessons-link:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.all-lessons-link.current {
    color: var(--primary);
    font-weight: 500;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: var(--spacing-xl) var(--spacing-2xl);
}

.content-wrapper {
    max-width: var(--content-max-width);
    margin: 0 auto;
}

/* Step Header */
.step-header {
    margin-bottom: var(--spacing-2xl);
}

.step-badge {
    display: inline-block;
    background: var(--primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    margin-bottom: var(--spacing-md);
}

.step-title {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.step-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* Content Typography */
.content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.content p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.content ul, .content ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-xl);
    color: var(--text-secondary);
}

.content li {
    margin-bottom: var(--spacing-sm);
}

.content strong {
    color: var(--text-primary);
}

/* Code Blocks */
.code-block {
    position: relative;
    margin: var(--spacing-lg) 0;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

/* File Edit Code Blocks - Code that should be written to a file */
.code-block.file-edit {
    border-left: 4px solid var(--secondary);
}

.code-block.file-edit .code-header {
    background: linear-gradient(90deg, rgba(5, 150, 105, 0.12), var(--bg-darker));
}

.code-block.file-edit .code-header::before {
    content: "📝 ";
    margin-right: 0.25rem;
}

.code-block.file-edit pre {
    background: linear-gradient(90deg, rgba(5, 150, 105, 0.06), var(--code-bg));
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-darker);
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.code-language {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
}

/* Code Filename - shown for file-edit blocks */
.code-filename {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--secondary);
    font-family: var(--font-mono);
}

.copy-button {
    background: var(--bg-card);
    border: none;
    color: var(--text-secondary);
    font-size: 0.8rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.copy-button:hover {
    background: var(--primary);
    color: white;
}

.copy-button.copied {
    background: var(--secondary);
    color: white;
}

pre {
    background: var(--code-bg);
    padding: var(--spacing-md);
    overflow-x: auto;
    margin: 0;
}

code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Inline Code */
.content code:not(pre code) {
    background: var(--bg-card);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.85em;
    color: var(--primary);
}

/* Info/Warning/Tip Boxes */
.info-box {
    padding: var(--spacing-lg);
    border-radius: 8px;
    margin: var(--spacing-lg) 0;
    border-left: 4px solid;
}

.info-box.info {
    background: rgba(124, 58, 237, 0.1);
    border-color: var(--primary);
}

.info-box.warning {
    background: rgba(245, 158, 11, 0.1);
    border-color: #F59E0B;
}

.info-box.tip {
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--secondary);
}

.info-box-title {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.info-box.info .info-box-title {
    color: var(--primary);
}

.info-box.warning .info-box-title {
    color: #B45309;
}

.info-box.tip .info-box-title {
    color: var(--secondary-dark);
}

/* Learn More Expandable */
.learn-more {
    background: var(--bg-card);
    border-radius: 8px;
    margin: var(--spacing-lg) 0;
    overflow: hidden;
}

.learn-more-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.learn-more-header:hover {
    background: var(--bg-card-hover);
}

.learn-more-title {
    font-weight: 600;
    color: var(--text-primary);
}

.learn-more-icon {
    font-size: 1.25rem;
    color: var(--text-muted);
    transition: transform var(--transition-fast);
}

.learn-more.open .learn-more-icon {
    transform: rotate(180deg);
}

.learn-more-content {
    padding: 0 var(--spacing-md) var(--spacing-md);
    display: none;
}

.learn-more.open .learn-more-content {
    display: block;
}

/* Navigation */
.step-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.nav-button {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.nav-button:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.nav-button.next {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.nav-button.next:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

.nav-button-text {
    display: flex;
    flex-direction: column;
}

.nav-button-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.nav-button:hover .nav-button-label {
    color: rgba(255, 255, 255, 0.7);
}

.nav-button.next .nav-button-label {
    color: rgba(255, 255, 255, 0.7);
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: var(--spacing-md);
    left: var(--spacing-md);
    z-index: 200;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 48px;
    height: 48px;
    border-radius: 8px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .content-wrapper {
        padding-top: 60px;
    }
}

@media (max-width: 768px) {
    .landing-container {
        padding: var(--spacing-lg);
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-stats {
        gap: var(--spacing-lg);
    }

    .stat-number {
        font-size: 2rem;
    }

    .lessons-grid {
        grid-template-columns: 1fr;
    }

    .step-title {
        font-size: 1.75rem;
    }

    .main-content {
        padding: var(--spacing-md);
    }

    .step-navigation {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .nav-button {
        width: 100%;
        justify-content: center;
    }
}

/* ===== Syntax Highlighting (Light Theme) ===== */
.hljs {
    color: #383a42;
    background: var(--code-bg);
}

.hljs-comment,
.hljs-quote {
    color: #a0a1a7;
    font-style: italic;
}

.hljs-keyword,
.hljs-selector-tag {
    color: #a626a4;
}

.hljs-string,
.hljs-addition {
    color: #50a14f;
}

.hljs-number {
    color: #986801;
}

.hljs-built_in,
.hljs-builtin-name {
    color: #c18401;
}

.hljs-function {
    color: #4078f2;
}

.hljs-title,
.hljs-section {
    color: #4078f2;
}

.hljs-attr,
.hljs-variable,
.hljs-template-variable {
    color: #986801;
}

.hljs-type,
.hljs-class .hljs-title {
    color: #c18401;
}

.hljs-deletion {
    color: #e45649;
}

.hljs-meta {
    color: #4078f2;
}