:root {
    --bg-color: var(--tg-theme-bg-color, #ffffff);
    --text-color: var(--tg-theme-text-color, #000000);
    --button-color: var(--tg-theme-button-color, #2481cc);
    --button-text: var(--tg-theme-button-text-color, #ffffff);
    --sec-bg: var(--tg-theme-secondary-bg-color, #f4f4f4);
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: sans-serif;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
}

#app { width: 100%; max-width: 450px; text-align: center; }

.card {
    background: var(--sec-bg);
    padding: 25px;
    border-radius: 15px;
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.main-btn, .secondary-btn {
    background-color: var(--button-color);
    color: var(--button-text);
    border: none;
    padding: 14px;
    border-radius: 10px;
    font-weight: bold;
    font-size: 16px;
    cursor: pointer;
    width: 100%;
}

.secondary-btn { opacity: 0.9; font-size: 14px; }

.hidden { display: none; }

#address-text {
    font-size: 11px;
    word-break: break-all;
    background: rgba(0,0,0,0.05);
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 10px;
}