body {
    background-color: #f0f0f0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}
.iphone-frame {
    width: 280px;
    height: 580px;
    background-color: #111;
    border-radius: 36px;
    padding: 8px;
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    margin: 0 auto;
}
.screen {
    width: 100%;
    height: 100%;
    background-color: white;
    border-radius: 28px;
    overflow: hidden;
    position: relative;
}
.notch {
    position: absolute;
    width: 120px;
    height: 25px;
    background-color: #111;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    border-bottom-left-radius: 14px;
    border-bottom-right-radius: 14px;
    z-index: 10;
}
iframe {
    width: 100%;
    height: 100%;
    border: none;
}
.navigation {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 50px;
    background-color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    border-top: 1px solid #eee;
    z-index: 5;
}
.nav-item {
    padding: 6px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: #3B82F6;
}
.nav-item.active {
    color: #3B82F6;
}
.nav-icon {
    font-size: 18px;
    margin-bottom: 1px;
}
.nav-text {
    font-size: 9px;
}
.preview-container {
    margin-bottom: 2rem;
}
@media (max-width: 768px) {
    .iphone-frame {
        width: 240px;
        height: 500px;
    }
    
    .notch {
        width: 100px;
        height: 20px;
    }
    
    .navigation {
        height: 40px;
    }
}
iframe {
    overflow-y: auto;
}