:root{color-scheme:light dark;font-family:system-ui,sans-serif}body{min-height:100dvh;margin:0;display:grid;place-items:center;background:var(--tg-theme-bg-color,#fff);color:var(--tg-theme-text-color,#111)}main{width:min(38rem,100%);box-sizing:border-box;padding:24px 20px}h1{font-size:1.5rem}p{line-height:1.5}button{width:100%;padding:14px 16px;border:0;border-radius:10px;font:inherit;font-weight:600;background:var(--tg-theme-button-color,#2481cc);color:var(--tg-theme-button-text-color,#fff)}button:disabled{opacity:.6}