:root {
    --primary-color: #2563eb;
    --secondary-color: #10b981;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --white: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

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

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

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

/* Navigation */
.navbar {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    transition: color 0.3s;
}

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

.btn-signup {
    background: var(--primary-color);
    color: var(--white) !important;
    padding: 0.5rem 1.5rem;
    border-radius: 0.375rem;
}

/* Hero Section */
.hero {
    padding: 5rem 0;
    background: linear-gradient(to bottom, var(--bg-light), var(--white));
}

.hero h1 {
    font-size: 3rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    max-width: 800px;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    max-width: 600px;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 4rem;
}

.btn-primary, .btn-secondary {
    padding: 0.75rem 2rem;
    font-size: 1.125rem;
    border: none;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.stats {
    display: flex;
    gap: 4rem;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.stat-label {
    color: var(--text-light);
}

/* Features Section */
.features {
    padding: 5rem 0;
}

.features h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 0.5rem;
    text-align: center;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

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

.feature-card h3 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

/* How It Works */
.how-it-works {
    padding: 5rem 0;
    background: var(--bg-light);
}

.how-it-works h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
}

.steps {
    display: flex;
    justify-content: space-around;
    gap: 2rem;
}

.step {
    flex: 1;
    text-align: center;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

/* CTA Section */
.cta-section {
    padding: 5rem 0;
    text-align: center;
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.signup-form {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 2rem 0;
}

.signup-form input {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 0.375rem;
    width: 300px;
}

.disclaimer {
    color: var(--text-light);
    font-size: 0.875rem;
}

/* Footer */
footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 2rem 0;
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .stats {
        justify-content: space-around;
    }
    
    .steps {
        flex-direction: column;
    }
    
    .signup-form {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-links {
        display: none;
    }
}