:root {
    --teal-app: #468189;
    --parchment: #F4E9CD;
    --rich-black: #031926;
    --ash-gray: #9DBEBB;
    --whitish: #F9F9F9;
    --cardboard: #AE9474;
    
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--whitish);
    color: var(--rich-black);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--rich-black);
}

a {
    text-decoration: none;
    color: inherit;
    transition: opacity 0.2s;
}

a:hover {
    opacity: 0.8;
}

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

/* Header */
header {
    padding: 20px 0;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--teal-app);
    letter-spacing: -0.5px;
}

.nav-links a {
    margin-left: 24px;
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--rich-black);
}

.btn-download {
    background-color: var(--teal-app);
    color: white !important;
    padding: 10px 20px;
    border-radius: 20px;
    font-weight: 600;
}

/* Hero Section */
.hero {
    padding: 100px 0 80px;
    text-align: center;
    background: linear-gradient(180deg, var(--whitish) 0%, #fff 100%);
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero p {
    font-size: 1.25rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto 40px;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.app-store-badge {
    height: 50px;
}

/* Features Section */
.features {
    padding: 80px 0;
    background-color: var(--parchment); /* Using parchment for a section background */
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: var(--rich-black);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background: white;
    padding: 30px;
    border-radius: 24px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    transition: transform 0.3s ease;
    border: 1px solid rgba(0,0,0,0.05);
}

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    display: inline-block;
    padding: 12px;
    background-color: rgba(70, 129, 137, 0.1); /* Teal with opacity */
    border-radius: 16px;
    color: var(--teal-app);
}

.feature-card h3 {
    margin-bottom: 12px;
    font-size: 1.25rem;
}

.feature-card p {
    color: #555;
    font-size: 0.95rem;
}

/* Apple Intelligence Section */
.ai-section {
    padding: 100px 0;
    background-color: var(--rich-black);
    color: white;
    text-align: center;
}

.ai-section h2 {
    color: white;
    margin-bottom: 20px;
}

.ai-section p {
    color: rgba(255,255,255,0.8);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.1rem;
}

.ai-badge {
    display: inline-block;
    background: linear-gradient(135deg, #FF0055, #0000FF); /* Generic AI gradient feel */
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
    font-size: 1.2rem;
    margin-bottom: 10px;
}

/* Footer */
footer {
    background-color: white;
    padding: 60px 0 30px;
    border-top: 1px solid #eee;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.footer-links a {
    margin-left: 30px;
    color: #666;
    font-size: 0.9rem;
}

.copyright {
    text-align: center;
    color: #999;
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
    /* Navigation */
    nav {
        flex-wrap: wrap;
        gap: 16px;
    }
    
    .logo {
        font-size: 1.25rem;
    }
    
    .nav-links {
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
        justify-content: center;
        width: 100%;
    }
    
    .nav-links a {
        margin: 0;
        font-size: 0.9rem;
    }
    
    /* Hero */
    .hero {
        padding: 60px 0 50px;
    }
    
    .hero h1 {
        font-size: 2.2rem;
        line-height: 1.2;
    }
    
    .hero p {
        font-size: 1.1rem;
        padding: 0 10px;
    }
    
    /* Features */
    .features {
        padding: 60px 0;
    }
    
    .features h2 {
        font-size: 2rem;
        margin-bottom: 40px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .feature-card {
        padding: 24px;
    }
    
    /* AI Section */
    .ai-section {
        padding: 60px 0;
    }
    
    .ai-section h2 {
        font-size: 2rem;
    }
    
    .ai-section p {
        font-size: 1rem;
        padding: 0 10px;
    }
    
    /* Footer */
    .footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .footer-links {
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    
    .footer-links a {
        margin: 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .features h2 {
        font-size: 1.75rem;
    }
    
    .btn-download {
        padding: 8px 16px;
        font-size: 0.9rem;
    }
}