:root{color-scheme:dark;font-family:system-ui,sans-serif}body{margin:0;background:#14161e;color:#e8eaf2}.app{max-width:640px;margin:0 auto;padding:32px 16px}h1{color:#ffd166;margin:0 0 8px}.lang{background:#1f2230;color:#e8eaf2;border:none;border-radius:8px;padding:6px 14px;cursor:pointer}table{width:100%;border-collapse:collapse;margin-top:12px}th,td{text-align:left;padding:10px 8px;border-bottom:1px solid #2a2e40}th{color:#9aa0b5}.error{color:#e5484d}.hint{color:#9aa0b5}