:root{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;color:#172033;background:#f4f6fa}
*{box-sizing:border-box}body{margin:0;min-height:100dvh;display:grid;place-items:center;padding:24px}
main{width:100%;max-width:420px;background:#fff;border:1px solid #e0e5ee;border-radius:12px;padding:32px}
h1{margin:0;font-size:28px}.intro{color:#64748b;line-height:1.6;margin:12px 0 28px}
label{display:block;font-size:14px;font-weight:600;margin-bottom:8px}
input,button{width:100%;min-height:44px;border-radius:8px;font:inherit;padding:10px 12px}
input{border:1px solid #cbd5e1}button{border:1px solid #3972d5;background:#3972d5;color:white;font-weight:600;margin-top:16px;cursor:pointer}
button:disabled{opacity:.65;cursor:wait}input:focus-visible,button:focus-visible{outline:2px solid #3972d5;outline-offset:3px}
#message{min-height:22px;color:#b42318;font-size:14px;line-height:1.5;margin:12px 0}
.note{font-size:12px;color:#64748b;line-height:1.6;margin:24px 0 0}