:root {
    --primary-color: #0056b3;
    --secondary-color: #2c3e50;
    --background-color: #f8f9fa;
    --text-color: #333;
    --dark-bg: #1a1a1a;
    --light-gray: #e9ecef;
    --border-color: #dee2e6;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
}

/* Navigation */
header {
    background-color: #fff;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
    margin: 0;
}

.nav-links a {
    text-decoration: none;
    color: var(--secondary-color);
    font-weight: 500;
    transition: color 0.3s;
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 4rem 2rem;
    text-align: center;
}

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

.hero p {
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto 2rem;
    opacity: 0.9;
}

.cta-button {
    display: inline-block;
    padding: 0.8rem 2rem;
    background-color: white;
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: transform 0.2s, box-shadow 0.2s;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Demo Section */
.demo-section {
    max-width: 1000px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.demo-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.demo-box {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: var(--shadow);
}

.demo-title {
    color: var(--secondary-color);
    margin-top: 0;
    margin-bottom: 1.5rem;
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
}

.demo-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.demo-card {
    background: var(--background-color);
    border-radius: 6px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.demo-card h3 {
    color: var(--secondary-color);
    font-size: 1.1rem;
    margin: 1rem 0 0.5rem 0;
}

.demo-card p {
    color: #555;
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0;
}

.video-wrapper {
    border-radius: 6px;
    overflow: hidden;
    background: #000;
    aspect-ratio: 16 / 9;
}

.video-wrapper video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.demo-placeholder {
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-gray);
    border-radius: 6px;
    border: 2px dashed var(--border-color);
}

.demo-placeholder p {
    font-size: 1.2rem;
    color: #adb5bd;
    font-weight: 500;
    margin: 0;
}

@media (max-width: 768px) {
    .demo-section {
        padding: 0 1rem;
    }

    .demo-box {
        padding: 1.5rem;
    }
}

/* Main Content */
main {
    max-width: 1000px;
    margin: 2rem auto;
    padding: 0 2rem;
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
    overflow: hidden;
    /* Contains floats/margins */
}

section {
    padding: 2rem 0;
    border-bottom: 1px solid var(--border-color);
}

section:last-child {
    border-bottom: none;
}

h2 {
    color: var(--secondary-color);
    margin-top: 2rem;
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
}

h3 {
    color: var(--secondary-color);
    margin-top: 1.5rem;
}

ul {
    padding-left: 1.5rem;
}

/* Code Blocks */
pre {
    background-color: var(--dark-bg);
    color: #f8f8f2;
    padding: 1.5rem;
    border-radius: 6px;
    overflow-x: auto;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
}

code {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    background-color: var(--light-gray);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    color: #d63384;
}

pre code {
    background-color: transparent;
    /* Reset for block code */
    color: inherit;
    padding: 0;
}

/* Images */
img {
    max-width: 1000px;
    height: auto;
    display: block;
    margin: 2rem auto;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.caption {
    text-align: center;
    color: #6c757d;
    font-size: 0.9rem;
    margin-top: -1.5rem;
    margin-bottom: 2rem;
}

/* Footer */
footer {
    background-color: var(--secondary-color);
    color: white;
    text-align: center;
    padding: 2rem;
    margin-top: 3rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        /* simple toggle later */
    }

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