:root{
  --gold:#c9a227;
  --gold-light:#f0d060;
  --gold-bright:#ffd700;
  --gold-dark:#8b6914;
  --bg:#080808;
  --panel:rgba(255,255,255,.03);
  --border:rgba(201,162,39,.2);
  --text:#e8e0d0;
  --text-dim:rgba(232,224,208,.55);
  --red:#ff4f6b;
}
*{margin:0;padding:0;box-sizing:border-box;}
body{
  font-family:'Inter',Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  min-height:100vh;
  display:flex;align-items:center;justify-content:center;
  padding:24px;
  position:relative;
  overflow:hidden;
}
body::before{
  content:'';position:fixed;inset:0;
  background:radial-gradient(circle at 50% 20%,rgba(201,162,39,.12) 0%,transparent 60%);
  pointer-events:none;
}
.auth-card{
  position:relative;z-index:1;
  width:100%;max-width:400px;
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:20px;
  padding:40px 36px;
  backdrop-filter:blur(20px);
  box-shadow:0 20px 60px rgba(0,0,0,.5);
}
.auth-logo{
  display:flex;flex-direction:column;align-items:center;gap:14px;
  margin-bottom:28px;text-align:center;
}
.auth-logo img{height:56px;width:auto;border-radius:10px;}
.auth-brand{font-size:22px;font-weight:900;color:#fff;}
.auth-brand .gold{
  background:linear-gradient(135deg,var(--gold-bright),var(--gold));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.auth-title{font-size:19px;font-weight:800;margin-bottom:4px;text-align:center;color:#fff;}
.auth-sub{font-size:13px;color:var(--text-dim);text-align:center;margin-bottom:26px;}
.auth-field{margin-bottom:16px;}
.auth-field label{display:block;font-size:12px;font-weight:600;color:var(--text-dim);margin-bottom:7px;letter-spacing:.4px;text-transform:uppercase;}
.auth-field input{
  width:100%;padding:12px 14px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--border);
  border-radius:10px;
  color:var(--text);font-size:15px;font-family:inherit;
  transition:border-color .15s,background .15s;
}
.auth-field input:focus{outline:none;border-color:var(--gold);background:rgba(255,255,255,.06);}
.auth-error{
  display:none;
  background:rgba(255,79,107,.1);
  border:1px solid rgba(255,79,107,.3);
  color:var(--red);font-size:13px;font-weight:600;
  padding:10px 14px;border-radius:10px;margin-bottom:16px;
}
.auth-error.show{display:block;}
.auth-btn{
  width:100%;padding:14px;
  background:linear-gradient(135deg,var(--gold-light),var(--gold),var(--gold-dark));
  border:none;border-radius:12px;
  color:#0a0800;font-size:15px;font-weight:800;letter-spacing:.5px;
  cursor:pointer;font-family:inherit;
  box-shadow:0 4px 20px rgba(201,162,39,.35);
  transition:transform .15s,box-shadow .15s,opacity .15s;
  margin-top:6px;
}
.auth-btn:hover{transform:translateY(-1px);box-shadow:0 6px 28px rgba(201,162,39,.5);}
.auth-btn:disabled{opacity:.6;cursor:not-allowed;transform:none;}
.auth-switch{text-align:center;margin-top:22px;font-size:13.5px;color:var(--text-dim);}
.auth-switch a{color:var(--gold-light);font-weight:700;}
.auth-back{
  display:block;text-align:center;margin-top:18px;font-size:12.5px;
  color:var(--text-dim);
}
.auth-back:hover{color:var(--gold-light);}