:root {
    --primary-blue: #007BFF;
    --success-green: #2ECC71;
    --bg-light: #F4F4F4;
    --text-dark: #1A1A1A;
    --text-gray: #707070;
    --radius-lg: 16px;
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
}

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

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
}

/* Header */
.header {
    background: white;
    padding: 20px 0;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: 'Poppins', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 24px;
    align-items: center;
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-link:hover {
    color: var(--primary-blue);
}

.btn-login {
    background: var(--primary-blue);
    color: white;
    padding: 10px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s;
}

.btn-login:hover {
    background: #0056b3;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Hero Section */
.hero {
    padding: 100px 0;
    text-align: center;
    background: linear-gradient(135deg, white 0%, rgba(0,123,255,0.05) 100%);
}

.hero h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-gray);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    background: var(--primary-blue);
    color: white;
    padding: 16px 32px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.125rem;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary:hover {
    background: #0056b3;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: white;
    color: var(--text-dark);
    padding: 16px 32px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.125rem;
    transition: all 0.2s;
    border: 2px solid var(--text-dark);
}

.btn-secondary:hover {
    background: var(--text-dark);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Features */
.features {
    padding: 80px 0;
    background: white;
}

.features h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 60px;
}

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

.feature-card {
    text-align: center;
    padding: 40px 20px;
    border-radius: var(--radius-lg);
    background: var(--bg-light);
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.feature-card p {
    color: var(--text-gray);
    line-height: 1.6;
}

/* CTA Section */
.cta {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-blue) 0%, #0056b3 100%);
    color: white;
    text-align: center;
}

.cta h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.cta p {
    font-size: 1.25rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

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

.cta .btn-primary:hover {
    background: var(--bg-light);
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 40px 0;
    text-align: center;
}

.footer p {
    opacity: 0.8;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1.125rem;
    }
    
    .features h2,
    .cta h2 {
        font-size: 2rem;
    }
    
    .nav-links {
        display: none;
    }
}