*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans SC",sans-serif;
  background:radial-gradient(1200px 600px at 20% 10%,#1a2250 0%,#0a0e27 45%,#05070f 100%);color:#e6ebff;min-height:100vh;
  display:flex;align-items:center;justify-content:center;padding:20px}
.card{width:100%;max-width:440px;background:rgba(20,26,55,.85);backdrop-filter:blur(10px);
  border:1px solid rgba(120,140,255,.15);border-radius:18px;padding:36px 32px;box-shadow:0 20px 60px rgba(0,0,0,.45)}
.logo{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,#4a6cf7,#7b5cff);
  display:flex;align-items:center;justify-content:center;font-size:26px;font-weight:800;margin:0 auto 16px;color:#fff}
h1{text-align:center;margin:0 0 6px;font-size:22px}
.sub{text-align:center;color:#8891b8;font-size:13px;margin-bottom:22px}
.field{margin-bottom:14px}
label{display:block;font-size:13px;color:#aab3dc;margin-bottom:6px}
input{width:100%;padding:11px 14px;background:#0f1434;border:1px solid #2a3168;border-radius:10px;color:#fff;font-size:14px;outline:none}
input:focus{border-color:#4a6cf7}
.row{display:flex;gap:8px}
.row input{flex:1}
.btn{width:100%;padding:12px;border:0;border-radius:10px;font-size:15px;font-weight:600;cursor:pointer;
  background:linear-gradient(135deg,#4a6cf7,#7b5cff);color:#fff;margin-top:8px}
.btn:disabled{opacity:.6;cursor:not-allowed}
.btn-code{flex:0 0 120px;background:#2a3168;padding:0 10px;font-size:13px;margin-top:0}
.msg{padding:10px 12px;border-radius:8px;font-size:13px;margin-bottom:14px;display:none}
.msg.err{background:rgba(255,80,100,.1);border:1px solid rgba(255,80,100,.3);color:#ff9aa8;display:block}
.msg.ok{background:rgba(80,220,140,.1);border:1px solid rgba(80,220,140,.3);color:#8fe8b5;display:block}
.foot{text-align:center;margin-top:20px;color:#8891b8;font-size:13px}
.foot a{color:#7b9cff;text-decoration:none}
.tabs{display:flex;gap:8px;margin-bottom:18px;background:#0f1434;padding:4px;border-radius:10px}
.tab{flex:1;text-align:center;padding:9px;border-radius:8px;cursor:pointer;color:#8891b8;font-size:14px}
.tab.active{background:linear-gradient(135deg,#4a6cf7,#7b5cff);color:#fff;font-weight:600}