:root{--ink:#123251;--blue:#55b5e8;--coral:#ff7064}*{box-sizing:border-box}body{margin:0;min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#fffaf3,#e2f5ff);color:var(--ink);font-family:Arial,"Microsoft JhengHei",sans-serif}main{width:min(470px,92vw);background:#fff;padding:38px;border-radius:28px;box-shadow:0 24px 70px #12325122;text-align:center}.logo{margin:auto;width:54px;height:54px;display:grid;place-items:center;background:var(--blue);color:#fff;border-radius:15px;font-size:28px}h1{margin:14px 0 6px}p{color:#667681;line-height:1.6}form{display:flex;flex-direction:column;gap:15px;text-align:left;margin-top:22px}label{display:flex;flex-direction:column;gap:7px;font-weight:bold}input{padding:13px;border:1px solid #d6dfe5;border-radius:11px;font-size:16px}button{border:0;border-radius:999px;background:var(--coral);color:#fff;padding:13px;font-weight:bold;font-size:16px;cursor:pointer}#qr{width:210px;height:210px}code,pre{display:block;background:#edf7fc;padding:12px;border-radius:10px;overflow:auto;user-select:all}#error{color:#d13e4c;font-weight:bold}#recovery pre{text-align:left;line-height:1.8}