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

:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border: #e2e8f0;
}

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

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

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

nav .logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

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

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

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

.btn {
    padding: 0.625rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    display: inline-block;
}

.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

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

/* Hero Section */
.hero {
    padding: 8rem 2rem 6rem;
    text-align: center;
    background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-light) 100%);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    color: var(--text-primary);
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2.5rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    align-items: center;
}

/* Product Demo Section */
.product-demo {
    padding: 6rem 2rem;
    background: var(--bg-white);
}

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

.product-demo h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.demo-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    margin-top: 2rem;
}

.demo-text {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.demo-text h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    line-height: 1.3;
}

.demo-text p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.demo-container {
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.demo-container img {
    width: 100%;
    height: auto;
    display: block;
}

/* Features Section */
.features {
    padding: 6rem 2rem;
    background: var(--bg-light);
}

.features h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--bg-light);
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

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

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* CTA Section */
.cta-section {
    padding: 6rem 2rem;
    background: var(--bg-white);
    text-align: center;
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.cta-section p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Footer */
footer {
    padding: 3rem 2rem;
    background: var(--bg-light);
    border-top: 1px solid var(--border);
}

footer .container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

footer p {
    color: var(--text-secondary);
}

footer .footer-links {
    display: flex;
    gap: 2rem;
}

footer a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

footer a:hover {
    color: var(--text-primary);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.125rem;
    }

    .hero-cta {
        flex-direction: column;
    }

    nav .nav-links {
        gap: 1rem;
    }

    footer .container {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }

    .features h2,
    .product-demo h2,
    .cta-section h2 {
        font-size: 2rem;
    }

    .demo-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .demo-text h3 {
        font-size: 1.75rem;
    }

    .demo-text p {
        font-size: 1rem;
    }
}