* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    line-height: 1.6;
    color: #333;
}

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

header {
    padding: 20px 0;
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #000;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
}

.btn {
    background: #000;
    color: #fff;
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    cursor: pointer;
}

.hero {
    text-align: center;
    padding: 80px 0;
    background: #f8f9fa;
}

.hero h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 20px;
    color: #666;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.features {
    padding: 80px 0;
}

.features h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.feature-card {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.feature-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

.demo-image {
    width: 100%;
    border-radius: 10px;
    margin: 20px 0;
}

footer {
    background: #000;
    color: #fff;
    padding: 40px 0;
    text-align: center;
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 36px;
    }
    .nav-links {
        display: none;
    }
}