:root{--tg-theme-bg-color: #ffffff;--tg-theme-text-color: #000000;--tg-theme-hint-color: #999999;--tg-theme-button-color: #3390ec;--tg-theme-secondary-bg-color: #f0f0f0}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--tg-theme-bg-color);color:var(--tg-theme-text-color)}.container{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.card{text-align:center;padding:32px;border-radius:16px;background:var(--tg-theme-secondary-bg-color);width:100%;max-width:360px}.avatar{width:72px;height:72px;border-radius:50%;background:var(--tg-theme-button-color);color:#fff;font-size:28px;font-weight:600;display:flex;align-items:center;justify-content:center;margin:0 auto 20px}.greeting{font-size:24px;font-weight:600;margin-bottom:8px}.user-id{font-size:14px;color:var(--tg-theme-hint-color);font-family:monospace;margin-bottom:16px}.subtitle{font-size:16px;color:var(--tg-theme-hint-color)}