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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 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;
}

h1 {
    font-size: 28px;
    margin-bottom: 5px;
}

.subtitle {
    color: var(--tg-theme-hint-color, #999999);
    margin-bottom: 20px;
}

.card {
    background-color: var(--tg-theme-secondary-bg-color, #f0f0f0);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 15px;
}

.card h2, .card h3 {
    margin-bottom: 10px;
}

button {
    display: block;
    width: 100%;
    padding: 15px;
    margin-top: 10px;
    background-color: var(--tg-theme-button-color, #2ecc71);
    color: var(--tg-theme-button-text-color, #ffffff);
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s;
}

button:active {
    opacity: 0.8;
}