:root{color-scheme:light dark}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);margin:0;min-height:100vh}*{margin:0;padding:0;box-sizing:border-box}.container{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;padding:20px;text-align:center}h1{font-size:24px;font-weight:600;margin-bottom:8px}.username{font-size:16px;color:var(--tg-theme-hint-color, #999999);margin-bottom:12px}.premium{display:inline-block;background:linear-gradient(135deg,#6b5ce7,#a855f7);color:#fff;padding:4px 12px;border-radius:12px;font-size:12px;font-weight:600}.loading{font-size:16px;color:var(--tg-theme-hint-color, #999999)}.error{font-size:14px;color:#f44;padding:16px;background:#ff44441a;border-radius:8px;max-width:300px}