/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --bg-card: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
    --gradient-alt: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-darker);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand h1 {
    font-size: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
}

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

.nav-menu a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: var(--gradient-alt);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    max-width: 500px;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* AI Visualization */
.hero-visual {
    animation: fadeIn 1s ease-out;
}

.ai-visualization {
    position: relative;
    width: 500px;
    height: 500px;
    margin: 0 auto;
}

.ai-node {
    position: absolute;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.5);
    animation: pulse 2s ease-in-out infinite;
}

.node-1 {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 0s;
}

.node-2 {
    top: 30%;
    left: 0;
    animation-delay: 0.4s;
}

.node-3 {
    top: 30%;
    right: 0;
    animation-delay: 0.8s;
}

.node-4 {
    bottom: 30%;
    left: 15%;
    animation-delay: 1.2s;
}

.node-5 {
    bottom: 30%;
    right: 15%;
    animation-delay: 1.6s;
}

.connection {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    animation: flow 3s linear infinite;
}

.connection-1 {
    top: 40px;
    left: 50%;
    width: 200px;
    transform: translateX(-50%);
    animation-delay: 0s;
}

.connection-2 {
    top: 190px;
    left: 50%;
    width: 150px;
    transform: translateX(-50%) rotate(45deg);
    animation-delay: 1s;
}

.connection-3 {
    top: 190px;
    left: 50%;
    width: 150px;
    transform: translateX(-50%) rotate(-45deg);
    animation-delay: 2s;
}

/* Sections */
.section {
    padding: 6rem 0;
    position: relative;
}

.section-alt {
    background: var(--bg-dark);
}

.section-title {
    font-size: 3rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 4rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* Content Cards */
.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.content-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 2rem;
    transition: var(--transition);
}

.content-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.content-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.content-card ul {
    list-style: none;
}

.content-card ul li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.content-card ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* Concept Grid */
.concept-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.concept-card {
    text-align: left;
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    transition: var(--transition);
}

.concept-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.concept-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-align: center;
    display: block;
}

.concept-card h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-light);
    text-align: center;
}

.concept-card p {
    margin-bottom: 0.75rem;
}

.concept-card p:last-child {
    margin-bottom: 0;
}

/* Comparison Table */
.comparison-table {
    overflow-x: auto;
    margin: 2rem 0;
    background: var(--bg-card);
    border-radius: 1rem;
    border: 1px solid var(--border-color);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: var(--bg-dark);
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    font-weight: 700;
    color: var(--primary-light);
}

tr:hover {
    background: rgba(99, 102, 241, 0.1);
}

/* Agent Types */
.agent-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.agent-type-card {
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    border-radius: 0.5rem;
    transition: var(--transition);
}

.agent-type-card:hover {
    border-left-color: var(--accent-color);
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.agent-type-card h4 {
    margin-bottom: 0.5rem;
    color: var(--primary-light);
}

/* Architecture Diagram */
.architecture-diagram {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 3rem;
    margin: 2rem 0;
}

.arch-layer {
    padding: 2rem;
    background: var(--bg-dark);
    border: 2px solid var(--primary-color);
    border-radius: 0.5rem;
    margin: 1rem 0;
    text-align: center;
    transition: var(--transition);
}

.arch-layer:hover {
    background: rgba(99, 102, 241, 0.1);
    transform: scale(1.02);
}

.arch-layer h4 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--primary-light);
}

.arch-arrow {
    text-align: center;
    font-size: 2rem;
    color: var(--primary-color);
    animation: bounce 1s infinite;
}

/* Component Details */
.component-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.component-card {
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    transition: var(--transition);
}

.component-card:hover {
    transform: translateY(-5px);
    border-color: var(--secondary-color);
    box-shadow: var(--shadow-lg);
}

.component-card h4 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.component-card p {
    margin-bottom: 0.75rem;
}

.component-card p:last-child {
    margin-bottom: 0;
}

/* Framework Cards */
.framework-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.framework-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 2rem;
    transition: var(--transition);
}

.framework-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.framework-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.framework-header h3 {
    font-size: 1.5rem;
}

.framework-tag {
    background: var(--gradient-primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.framework-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.feature-tag {
    background: var(--bg-dark);
    color: var(--primary-light);
    padding: 0.25rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
}

/* Application Showcase */
.application-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.app-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 2rem;
    text-align: left;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition);
}

.app-card:hover::before {
    transform: scaleX(1);
}

.app-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.app-card.featured {
    grid-column: span 2;
}

.app-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.app-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-light);
}

.app-card p {
    margin-bottom: 0.75rem;
}

.app-card p:last-child {
    margin-bottom: 0;
}

/* Challenge Grid */
.challenge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.challenge-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 2rem;
    transition: var(--transition);
}

.challenge-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
    box-shadow: var(--shadow-lg);
}

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

.challenge-card h3 {
    color: var(--accent-color);
    margin-bottom: 1rem;
}

/* Best Practices */
.best-practices {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.practice-item {
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    transition: var(--transition);
}

.practice-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.practice-item h4 {
    color: var(--primary-light);
    margin-bottom: 0.5rem;
}

/* Resources Grid */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.resource-category {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 2rem;
}

.resource-category h3 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.resource-category ul {
    list-style: none;
}

.resource-category ul li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.resource-category ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.resource-category a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.resource-category a:hover {
    color: var(--primary-light);
}

/* Checklist */
.checklist {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 2rem;
    margin: 2rem 0;
}

.checklist-item {
    display: flex;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.checklist-item:last-child {
    border-bottom: none;
}

.checklist-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-right: 1rem;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.checklist-item label {
    cursor: pointer;
    user-select: none;
}

/* Footer */
.footer {
    background: var(--bg-darker);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0;
    text-align: center;
    color: var(--text-muted);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 30px rgba(99, 102, 241, 0.5);
    }
    50% {
        transform: scale(1.1);
        box-shadow: 0 0 40px rgba(99, 102, 241, 0.8);
    }
}

@keyframes flow {
    0% {
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(10px);
    }
}

/* Scroll Behavior */
html {
    scroll-behavior: smooth;
}

/* Responsive Design */
@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
    }

    .hero-visual {
        order: -1;
    }

    .ai-visualization {
        width: 100%;
        max-width: 400px;
    }

    .app-card.featured {
        grid-column: span 1;
    }

    .content-grid,
    .framework-grid,
    .application-showcase {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: var(--bg-dark);
        width: 100%;
        padding: 2rem;
        transition: var(--transition);
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .concept-grid,
    .agent-types {
        grid-template-columns: 1fr;
    }

    .architecture-diagram {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

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

    .container {
        padding: 0 15px;
    }
}

/* Content Section */
.content-section {
    margin-bottom: 3rem;
}

.content-section:last-child {
    margin-bottom: 0;
}