:root{
  --bg:#0f1720;
  --card:#0f1728aa;
  --accent:#b673f4;
  --muted:#9aa3b2;
  --success:#27ae60;
  --danger:#e74c3c;
  --glass: rgba(255,255,255,0.03);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:Inter, "Segoe UI", Roboto, Arial, sans-serif;
  background:
    linear-gradient(180deg, rgba(6,9,30,0.8), rgba(10,12,20,0.9)),
    url('images/bg-pattern.jpg') center/cover no-repeat;
  color:#e6eef8;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:32px;
}

/* Card */
.card-wrap{
  width:100%;
  max-width:980px;
  display:grid;
  grid-template-columns: 360px 1fr;
  gap:28px;
  align-items:start;
}

/* Brand */
.brand{
  background: linear-gradient(180deg, rgba(255,255,255,0.02), var(--glass));
  border-radius:14px;
  padding:28px;
  box-shadow:0 8px 30px rgba(2,6,23,0.6);
  display:flex;
  gap:14px;
  align-items:center;
  flex-direction:column;
  text-align:center;
}
.logo{
  width:96px;height:96px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--accent),#6a5df4);
  font-weight:700;color:white;font-size:28px;box-shadow:0 6px 18px rgba(106,93,244,0.25);
}
.brand-text h1{font-size:18px;margin:6px 0}
.brand-text p{color:var(--muted);font-size:13px}

/* Forms area */
.forms{background:linear-gradient(180deg, rgba(255,255,255,0.01), rgba(255,255,255,0.02));
  border-radius:14px;padding:18px;box-shadow:0 8px 30px rgba(3,8,20,0.6);
}

/* Tabs */
.tabs{display:flex;gap:8px;margin-bottom:12px}
.tab{
  background:transparent;border:none;padding:10px 14px;border-radius:10px;color:var(--muted);
  cursor:pointer;font-weight:600;
}
.tab.active{color:white;background:linear-gradient(90deg,var(--accent), #6a5df4);box-shadow:0 6px 18px rgba(106,93,244,0.18)}

/* Panel */
.panel{padding:8px 12px}
.panel.hidden{display:none}
h2{margin:0 0 12px;font-size:20px;color:#fff}
.field{display:block;margin:12px 0}
.label-text{display:block;color:var(--muted);font-size:13px;margin-bottom:6px}
input[type="text"],input[type="password"],input[type="email"]{
  width:100%;padding:12px 14px;border-radius:10px;border:1px solid rgba(255,255,255,0.04);
  background:linear-gradient(180deg, rgba(255,255,255,0.01), rgba(255,255,255,0.02));
  color:#eaf3ff;font-size:15px;outline:none;transition:box-shadow .15s, border-color .15s;
}
input:focus{box-shadow:0 8px 20px rgba(106,93,244,0.12);border-color:rgba(182,115,244,0.6)}

.pw-row{display:flex;gap:8px;align-items:center}
.pw-row input{flex:1}
.pw-toggle{background:transparent;border:1px solid rgba(255,255,255,0.04);padding:8px;border-radius:8px;color:var(--muted);cursor:pointer}

.pw-meter{display:flex;align-items:center;gap:10px;margin-top:8px}
.meter-bar{height:8px;width:120px;border-radius:6px;background:rgba(255,255,255,0.06);overflow:hidden}
.meter-bar > span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--accent),#6a5df4);transition:width .2s}
.meter-label{font-size:12px;color:var(--muted)}

/* small helper */
.small{font-size:13px}
.muted{color:var(--muted)}
.center{text-align:center}
.link-btn{background:none;border:none;color:var(--accent);cursor:pointer;font-weight:600}

/* buttons */
.form-row{margin-top:14px}
.btn{padding:12px 14px;border-radius:10px;border:none;cursor:pointer;font-weight:700}
.btn.primary{background:linear-gradient(90deg,var(--accent),#6a5df4);color:white;box-shadow:0 10px 25px rgba(106,93,244,0.12)}
.btn.w100{width:100%}
.btn.oauth{background:transparent;border:1px solid rgba(255,255,255,0.04);color:var(--muted);display:inline-flex;align-items:center;gap:10px;padding:10px;border-radius:10px}

/* divider */
.divider{text-align:center;color:var(--muted);margin:16px 0;position:relative}
.divider::before,.divider::after{content:'';height:1px;background:rgba(255,255,255,0.03);position:absolute;top:50%;width:40%;left:0;right:0}
.divider::before{left:0}
.divider::after{right:0}
.divider span{background:transparent;padding:0 12px;position:relative;z-index:2;color:var(--muted)}

/* oauth row */
.oauth-row{display:flex;gap:10px;flex-wrap:wrap;justify-content:space-between}

/* errors */
.error{display:block;color:var(--danger);font-size:13px;margin-top:6px;min-height:18px}

/* checkbox style */
.field.checkbox{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:14px}

/* responsive */
@media (max-width:880px){
  .card-wrap{grid-template-columns:1fr;max-width:520px}
  .brand{flex-direction:row;justify-content:flex-start;text-align:left;padding:18px}
  .brand-text{margin-left:10px}
}