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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
}

main {
    text-align: center;
    padding: 2rem;
}

h1 {
    font-size: 4rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.tagline {
    font-size: 1.5rem;
    font-weight: 300;
    color: #a0a0a0;
    margin-bottom: 3rem;
}

.app-link {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #ffffff;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 500;
    border-radius: 50px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.app-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

@media (max-width: 600px) {
    h1 {
        font-size: 2.5rem;
    }

    .tagline {
        font-size: 1.2rem;
    }
}