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

/* Safe area support for iPhone X and later */
@supports (padding-top: env(safe-area-inset-top)) {
    body {
        padding-top: env(safe-area-inset-top);
        padding-right: env(safe-area-inset-right);
        padding-bottom: env(safe-area-inset-bottom);
        padding-left: env(safe-area-inset-left);
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    text-align: center;
}

h1 {
    color: #2c3e50;
    margin-bottom: 20px;
}

p {
    margin-bottom: 20px;
}

button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 18px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #2980b9;
}

#message {
    margin-top: 20px;
    font-weight: bold;
    min-height: 20px;
}

/* Responsive adjustments */
@media (max-width: 480px) {
    .container {
        padding: 15px;
    }

    h1 {
        font-size: 24px;
    }

    button {
        padding: 12px 24px;
        font-size: 16px;
    }
}