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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--tg-theme-bg-color, #ffffff);
    color: var(--tg-theme-text-color, #000000);
    padding: 20px;
    min-height: 100vh;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    padding-top: 50px;
}

h1 {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--tg-theme-text-color, #000000);
}

p {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--tg-theme-hint-color, #999999);
}

#user-info {
    background-color: var(--tg-theme-secondary-bg-color, #f0f0f0);
    padding: 15px;
    border-radius: 12px;
    margin: 20px 0;
    font-size: 14px;
}

.button {
    background-color: var(--tg-theme-button-color, #0088cc);
    color: var(--tg-theme-button-text-color, #ffffff);
    border: none;
    padding: 15px 30px;
    font-size: 18px;
    border-radius: 12px;
    cursor: pointer;
    margin-top: 20px;
    transition: opacity 0.3s;
}

.button:hover {
    opacity: 0.8;
}

.button:active {
    opacity: 0.6;
}