:root{
  --gold:#8b7ffe;--gold-light:#d84cff;--gold-dark:#6d5dfc;
  --gold-glow:rgba(109,93,252,.28);--mekong:#5c8dff;
  --bg:#030612;--bg2:rgba(12,18,36,.88);--bg3:rgba(20,28,52,.82);
  --border:rgba(120,140,255,.18);--text:#f7f8ff;--text-body:#c5cde8;
  --text2:#9da8c7;--text3:#687393;--red:#ff4f7b;
  --radius:14px;--radius-sm:8px;--transition:.2s;
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:
    radial-gradient(60% 80% at 20% 10%, rgba(109,93,252,.18), transparent 60%),
    radial-gradient(50% 70% at 90% 100%, rgba(216,76,255,.12), transparent 60%),
    var(--bg);
  color:var(--text);min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;
}
.card{
  width:100%;max-width:420px;background:var(--bg2);
  border:1px solid var(--border);border-radius:var(--radius);
  padding:36px 32px 28px;backdrop-filter:blur(18px);
  box-shadow:0 12px 50px rgba(0,0,0,.55), 0 0 28px var(--gold-glow);
  position:relative;overflow:hidden;
}
.card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--gold),var(--gold-light),var(--gold),transparent);
}
.brand{display:flex;flex-direction:column;align-items:center;gap:8px;margin-bottom:24px}
.brand-logo{
  width:64px;height:64px;border-radius:50%;border:2px solid var(--gold);
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--gold-dark),var(--gold-light));
  box-shadow:0 0 24px var(--gold-glow);font-size:1.6rem;font-weight:800;color:#fff;
}
.brand-name{
  font-size:1.25rem;font-weight:800;letter-spacing:.05em;
  background:linear-gradient(135deg,var(--gold-light) 0%,var(--gold) 50%,var(--gold-dark) 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.brand-tag{font-size:.72rem;color:var(--text2);letter-spacing:.08em;text-transform:uppercase}
h1{font-size:1.05rem;font-weight:700;color:var(--text);text-align:center;margin-bottom:6px}
.subtitle{font-size:.82rem;color:var(--text3);text-align:center;margin-bottom:22px}
.form-group{margin-bottom:14px}
.form-label{
  display:block;font-size:.72rem;font-weight:700;color:var(--text3);
  margin-bottom:6px;text-transform:uppercase;letter-spacing:.06em;
}
.form-input{
  width:100%;background:var(--bg3);border:1px solid var(--border);
  border-radius:var(--radius-sm);padding:11px 14px;color:var(--text);
  font-size:.92rem;font-family:inherit;outline:none;transition:var(--transition);
}
.form-input:focus{border-color:var(--gold);box-shadow:0 0 0 3px var(--gold-glow)}
.password-wrap{position:relative}
.password-toggle{
  position:absolute;right:10px;top:50%;transform:translateY(-50%);
  background:none;border:none;color:var(--text3);cursor:pointer;
  padding:4px 8px;font-size:.78rem;transition:var(--transition);
}
.password-toggle:hover{color:var(--gold)}
.error{
  background:rgba(255,79,123,.08);border:1px solid rgba(255,79,123,.35);
  color:#ff8aa6;padding:9px 12px;border-radius:var(--radius-sm);
  font-size:.82rem;margin-bottom:14px;text-align:center;
}
.btn-login{
  width:100%;padding:12px;border:none;border-radius:var(--radius-sm);
  background:linear-gradient(135deg,var(--gold-dark),var(--gold-light));
  color:#fff;font-size:.92rem;font-weight:700;letter-spacing:.03em;
  cursor:pointer;transition:var(--transition);margin-top:6px;
}
.btn-login:hover:not(:disabled){box-shadow:0 6px 22px var(--gold-glow);transform:translateY(-1px)}
.btn-login:disabled{opacity:.55;cursor:not-allowed}
.footer-note{margin-top:18px;text-align:center;font-size:.72rem;color:var(--text3)}