/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f7;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem 1rem;
}

/* Landing Container */
.landing-container {
    max-width: 800px;
    width: 100%;
    background: white;
    border-radius: 16px;
    padding: 3rem 2.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
}

/* Logo Section */
.logo-section {
    margin-bottom: 2rem;
}

.app-logo {
    width: 120px;
    height: 120px;
    border-radius: 24px;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    transition: transform 0.3s ease;
}

.app-logo:hover {
    transform: scale(1.05);
}

/* Hero Section */
.hero-section {
    margin-bottom: 3rem;
}

.headline {
    font-size: 2.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.tagline {
    font-size: 1.25rem;
    color: #555;
    line-height: 1.7;
    max-width: 680px;
    margin: 0 auto;
}

/* Features Section */
.features-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
    padding: 2rem 0;
}

.feature-item {
    text-align: center;
    transition: transform 0.3s ease;
}

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

.feature-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 0.75rem;
}

.feature-item h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 0.5rem;
}

.feature-item p {
    font-size: 0.95rem;
    color: #666;
    line-height: 1.5;
}

/* Download Section */
.download-section {
    margin-bottom: 3rem;
    padding: 2rem 0;
}

.app-store-button {
    display: inline-block;
    text-decoration: none;
}

.app-store-button img {
    height: 60px;
    width: auto;
    transition: opacity 0.3s ease;
}

.app-store-button:hover img {
    opacity: 0.8;
}

.availability-note {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: #888;
}

/* Footer */
.footer {
    padding-top: 2rem;
    border-top: 1px solid #e0e0e0;
}

.footer-nav {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.footer-nav a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.footer-nav a:hover {
    color: #764ba2;
    text-decoration: underline;
}

.copyright {
    font-size: 0.9rem;
    color: #888;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 1rem;
    }

    .landing-container {
        padding: 2rem 1.5rem;
    }

    .headline {
        font-size: 2rem;
    }

    .tagline {
        font-size: 1.1rem;
    }

    .features-section {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .footer-nav {
        gap: 1.5rem;
    }
}

@media (max-width: 480px) {
    .headline {
        font-size: 1.75rem;
    }

    .tagline {
        font-size: 1rem;
    }

    .features-section {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .app-logo {
        width: 100px;
        height: 100px;
    }

    .feature-icon {
        font-size: 2.5rem;
    }
}