:root {
    --primary-color: #4169E1;
    --secondary-color: #5856D6;
    --background-color: #ffffff;
    --text-color: #333333;
    --light-gray: #f5f5f5;
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-gray);
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: #0084bf;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.75rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
}

.nav-logo {
    height: 40px;
    width: auto;
}

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

.nav-links a {
    margin: 0;
    text-decoration: none;
    color: #ffffff;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: 6px;
}

.nav-links a:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e9f2 100%);
    padding: 6rem 2rem 2rem;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 3rem;
    color: #666;
}

.download-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2.5rem;
}

.qr-container-wrapper {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
    width: 100%;
}

.qr-container {
    background: var(--light-gray);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    text-align: center;
    flex: 1;
    min-width: 280px;
    max-width: 320px;
}

.qr-container h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.qr-code {
    width: 250px;
    height: 250px;
    margin: 0 auto 1rem;
}

.qr-code img {
    width: 100%;
    height: 100%;
}

.store-button {
    margin-top: 1.5rem;
    display: inline-block;
    width: 250px;
    background: #000;
    padding: 0.25rem;
    border-radius: 8px;
    transition: var(--transition);
    text-decoration: none;
}

.store-button div {
    width: 100%;
    height: 50px;
    transition: var(--transition);
    vertical-align: middle;
    text-align: center;
    line-height: 50px;
    object-fit: contain;
    color: #ffffff;
    font-size: 1em;
    font-weight: bold;
}

.store-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    background: #222;
}

.store-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

.features {
    padding: 5rem 2rem;
    background: white;
}

.features h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2.5rem;
    color: var(--primary-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: var(--light-gray);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

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

.contact {
    padding: 5rem 2rem;
    text-align: center;
    background: var(--light-gray);
}

.contact h2 {
    margin-bottom: 2rem;
    font-size: 2.5rem;
    color: var(--primary-color);
}

.contact-button {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-weight: 500;
}

.contact-button:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.footer {
    background: white;
    padding: 2rem;
    text-align: center;
    border-top: 1px solid #eee;
}

.install-note {
    font-size: 0.9rem;
    color: #666;
    margin-top: 0.5rem;
}

@media (max-width: 768px) {
    .hero-content {
        padding: 2rem;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .nav-links {
        display: none;
    }

    .store-buttons {
        flex-direction: column;
        align-items: center;
    }

    .store-button {
        width: 240px;
        margin: 1rem auto;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .qr-container {
        min-width: 100%;
        margin-bottom: 1rem;
    }
}