:root{--bg:var(--tg-theme-bg-color,#fff);--text:var(--tg-theme-text-color,#111);--hint:var(--tg-theme-hint-color,#707579);--button-bg:var(--tg-theme-button-color,#2481cc);--button-text:var(--tg-theme-button-text-color,#fff);--secondary-bg:var(--tg-theme-secondary-bg-color,#f4f4f5)}*{box-sizing:border-box;margin:0;padding:0}body,html{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:15px;line-height:1.4;min-height:100vh}main{padding:16px;max-width:720px;margin:0 auto}h1{font-size:22px;font-weight:600;margin-bottom:8px}.hint{color:var(--hint)}.card{background:var(--secondary-bg);border-radius:12px;padding:16px;margin-top:16px}.error{color:#d23a3a;white-space:pre-wrap;font-family:ui-monospace,monospace;font-size:13px}