*{box-sizing:border-box}html,body{margin:0;height:100%;background:#0d1117;color:#e6edf3;font:15px/1.45 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
body{display:flex;align-items:center;justify-content:center;padding:20px}
.box{width:100%;max-width:360px;background:#161b22;border:1px solid #2a3240;border-radius:14px;padding:24px}
h1{margin:0;font-size:22px}.sub{color:#8b949e;margin:4px 0 18px}
label{display:block;color:#8b949e;font-size:13px;margin-bottom:12px}
input{display:block;width:100%;margin-top:5px;background:#0d1117;border:1px solid #2a3240;color:#e6edf3;border-radius:9px;padding:11px 12px;font-size:16px}
input:focus{outline:none;border-color:#58a6ff}
button{width:100%;margin-top:6px;background:#1f6feb;color:#fff;border:0;border-radius:9px;padding:12px;font-size:16px;font-weight:600;cursor:pointer}
.err{background:rgba(248,81,73,.12);border:1px solid rgba(248,81,73,.45);color:#ffb3ad;border-radius:9px;padding:9px 11px;margin-bottom:12px;font-size:13px}
.foot{color:#8b949e;font-size:12px;margin:14px 0 0}