:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #64748b;
    --bg: #f8fafc;
    --text: #0f172a;
    --light: #ffffff;
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    background-color: var(--bg);
    color: var(--text);
    scroll-behavior: smooth;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

nav {
    background: var(--light);
    height: 80px;
    display: flex;
    align-items: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav .container {
    display: flex;
    justify-content: space-between;
    width: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text);
}

.logo span {
    color: var(--primary);
}

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

.nav-links a {
    text-decoration: none;
    color: var(--secondary);
    font-weight: 600;
}

.hero {
    padding: 100px 0;
    text-align: center;
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero p {
    font-size: 1.25rem;
    color: var(--secondary);
    max-width: 700px;
    margin: 0 auto 2.5rem;
}

.btn-primary {
    background: var(--primary);
    color: white;
    padding: 1rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    transition: background 0.2s;
}

.btn-primary:hover { background: var(--primary-dark); }

.btn-outline {
    border: 2px solid var(--primary);
    color: var(--primary);
    padding: 1rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin: 4rem 0 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
}

.feature-card .icon { font-size: 2rem; margin-bottom: 1rem; }

.pricing-grid {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 5rem;
}

.price-card {
    background: white;
    padding: 3rem 2rem;
    border-radius: 16px;
    width: 350px;
    text-align: center;
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
    position: relative;
}

.price-card.pro { border: 2px solid var(--primary); }

.price-card .badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
}

.price { font-size: 3rem; font-weight: 800; margin: 1.5rem 0; }

.price-card ul {
    list-style: none;
    margin-bottom: 2rem;
    text-align: left;
}

.price-card li { margin-bottom: 0.5rem; color: var(--secondary); }

.download-section {
    background: var(--text);
    color: white;
    padding: 80px 0;
    text-align: center;
}

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

.btn-large {
    background: #10b981;
    color: white;
    padding: 1.5rem 3rem;
    font-size: 1.25rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 700;
    display: inline-block;
    margin-top: 2rem;
}

footer {
    padding: 3rem 0;
    text-align: center;
    color: var(--secondary);
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }

    .hero-btns {
        display: flex;
        flex-direction: column;
        gap: 1rem;
        padding: 0 1rem;
    }

    .nav-links {
        display: none; /* Simplificação: Em produção aqui entraria um menu hambúrguer */
    }

    .pricing-grid {
        flex-direction: column;
        align-items: center;
    }

    .price-card {
        width: 100%;
        max-width: 350px;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .btn-large {
        width: 90%;
        padding: 1.2rem 1.5rem;
        font-size: 1.1rem;
    }
}