*{box-sizing:border-box}
body{margin:0;font:16px/1.6 "Microsoft JhengHei",system-ui,sans-serif;color:#152d46;background:#fff}
main{min-height:100vh;min-height:100svh;display:grid;grid-template-columns:1fr 1fr}
.brand{display:grid;align-content:center;justify-items:center;background:radial-gradient(ellipse at 70% 25%,#ddf8f2,transparent 60%),linear-gradient(130deg,#f3f8ff,#e1edf5);padding:3rem}
.brand img{width:min(73%,360px);height:auto;display:block}.brand p{margin:0;color:#294960;font-weight:650;letter-spacing:.24em}
.panel{display:flex;flex-direction:column;justify-content:center;align-items:center;padding:clamp(24px,5vw,76px);gap:30px}
form{width:min(100%,400px)}h1{font-size:clamp(28px,3.2vw,42px);line-height:1.2;margin:0 0 12px}#hint,footer{color:#526679}#hint{margin:0 0 26px}
label{display:block;font-weight:600;margin:12px 0}input{width:100%;font:inherit;padding:10px 13px;margin-top:5px;border:1px solid #a7bac8;border-radius:8px}
button{cursor:pointer;font:inherit}input:focus-visible,button:focus-visible{outline:3px solid #099798;outline-offset:2px}
#submit{width:100%;background:#14568b;border:0;border-radius:8px;color:white;padding:12px;font-weight:bold}button:disabled{opacity:.65;cursor:wait}
nav{display:flex;justify-content:space-between;margin-top:14px}nav button{color:#165c83;background:none;border:0;padding:6px 0}
#status{color:#943a22;margin:10px 0}footer{font-size:13px;text-align:center}[hidden]{display:none!important}
@media(max-width:700px){main{display:flex;flex-direction:column}.brand{padding:12px;display:flex;align-items:center;justify-content:center;gap:12px}.brand img{width:94px}.panel{padding:28px 22px;flex:1}.brand p{letter-spacing:.08em}}