/**
 * Lord of Leverage - Modern Documentation Style
 * Copyright Stephen Sebro 2025
 */

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #8b5cf6;
    --success: #10b981;
    --warning: #f59e0b;
    --background: #ffffff;
    --surface: #f9fafb;
    --surface-dark: #f3f4f6;
    --border: #e5e7eb;
    --text: #111827;
    --text-muted: #6b7280;
    --sidebar-width: 280px;
    --nav-height: 64px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: var(--background);
}

/* Top Navigation Bar */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--background);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
    margin-left: auto;
    align-items: center;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--primary);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    margin-right: 1rem;
}

.hamburger span {
    width: 20px;
    height: 2px;
    background: var(--text);
    transition: all 0.3s;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Sidebar Navigation */
.sidebar {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--nav-height));
    background: var(--surface);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 2rem 0;
    transition: transform 0.3s ease;
}

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

.sidebar-section h3 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    padding: 0 1.5rem;
    margin-bottom: 0.75rem;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1.5rem;
    color: var(--text);
    text-decoration: none;
    font-size: 0.95rem;
    transition: all 0.2s;
}

.sidebar-link:hover {
    background: var(--surface-dark);
    color: var(--primary);
}

.sidebar-link.active {
    background: var(--primary);
    color: white;
    font-weight: 500;
}

.sidebar-link .icon {
    font-size: 1.25rem;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--nav-height);
    padding: 3rem;
    max-width: 1200px;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 1rem;
    margin-bottom: 3rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 800;
}

.hero p {
    font-size: 1.25rem;
    opacity: 0.95;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.hero-cta {
    display: inline-flex;
    gap: 1rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s;
    display: inline-block;
}

.btn-primary {
    background: white;
    color: var(--primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
}

.btn-secondary {
    background: rgba(255,255,255,0.2);
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.3);
}

/* Path Cards */
.path-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 3rem 0;
}

.path-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 2rem;
    transition: all 0.3s;
    cursor: pointer;
}

.path-card:hover {
    border-color: var(--primary);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.1);
    transform: translateY(-4px);
}

.path-card .icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.path-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.path-card .meta {
    display: flex;
    gap: 1rem;
    margin: 1rem 0;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.path-card .meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.path-card p {
    color: var(--text-muted);
    line-height: 1.6;
}

.path-card .start-btn {
    margin-top: 1.5rem;
    padding: 0.5rem 1rem;
    background: var(--primary);
    color: white;
    border-radius: 0.5rem;
    text-decoration: none;
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    transition: background 0.2s;
}

.path-card .start-btn:hover {
    background: var(--primary-dark);
}

/* Section Styling */
.section {
    margin: 4rem 0;
}

.section h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text);
}

.section-intro {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    max-width: 800px;
}

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

.feature {
    padding: 1.5rem;
}

.feature .icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.feature h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.feature p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-links {
        display: none;
    }

    .sidebar {
        transform: translateX(-100%);
    }

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

    .main-content {
        margin-left: 0;
        padding: 2rem 1rem;
    }

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

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

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

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --background: #111827;
        --surface: #1f2937;
        --surface-dark: #374151;
        --border: #374151;
        --text: #f9fafb;
        --text-muted: #9ca3af;
    }

    .hero {
        background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    }
}