:root{
  color-scheme:light;
  --bg:#4b4b4b;
  --card:#1f1f1f;
  --panel:#161616;
  --panel2:#101010;
  --text:#f2f2f2;
  --muted:#bfbfbf;
  --line:#3a3a3a;
  --blue:#bfe5ff;
  --gold:#ffeaa0;
  --danger:#ffb0b0;
  --good:#b8f0c2;
}

*{box-sizing:border-box;}
body{
  margin:0;
  min-height:100vh;
  font-family:Arial, Helvetica, sans-serif;
  background:
    radial-gradient(circle at top, rgba(191,229,255,0.18), transparent 35%),
    var(--bg);
  color:var(--text);
}

.login-shell{
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:24px;
}

.login-card{
  width:min(720px, 100%);
  background:var(--card);
  border:2px solid #000;
  border-radius:14px;
  padding:22px;
  box-shadow:0 14px 36px rgba(0,0,0,0.45);
}

.brand-row{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  gap:18px;
  margin-bottom:16px;
}

h1{margin:0;font-size:42px;line-height:1;}
h2{margin:0 0 8px;font-size:24px;}
.subtitle{margin:8px 0 0;color:var(--muted);}
.version-pill{
  background:#111;
  border:1px solid var(--line);
  border-radius:999px;
  padding:7px 10px;
  color:var(--gold);
  white-space:nowrap;
}

.top-tabs{
  display:grid;
  grid-template-columns:repeat(3, minmax(0,1fr));
  gap:8px;
  margin-bottom:14px;
}

.tab-button{
  border:1px solid var(--line);
  border-radius:10px;
  padding:12px;
  background:#111;
  color:#fff;
  font-weight:bold;
}
.tab-button.active{
  background:#154f85;
  outline:2px solid var(--blue);
  outline-offset:1px;
}

.notice,
.auth-panel{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:10px;
  padding:14px;
}

.notice{
  border-left:5px solid var(--gold);
  margin-bottom:14px;
  color:#e7e7e7;
}

.auth-panel{display:none;}
.auth-panel.active{display:block;}
.panel-note{margin:0 0 14px;color:var(--muted);}

.account-form{display:grid;gap:12px;}
label{display:grid;gap:6px;color:var(--muted);font-weight:bold;}
input{
  width:100%;
  border:1px solid var(--line);
  border-radius:8px;
  background:#0e0e0e;
  color:var(--text);
  padding:12px;
  font-size:16px;
}
input:focus{outline:2px solid var(--blue);outline-offset:2px;}
.password-line{display:flex;gap:8px;align-items:center;}
.password-line input{flex:1 1 auto;}

button,a{font:inherit;}
button{
  border:0;
  border-radius:8px;
  padding:11px 14px;
  background:#111;
  color:#fff;
  cursor:pointer;
}
button.primary{background:#154f85;color:#fff;}
button.mini-button{
  flex:0 0 auto;
  min-width:72px;
  border:1px solid var(--line);
  padding:10px;
}
button:hover,a:hover{filter:brightness(1.15);}
.button-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:4px;}

.account-readout,
.error-readout{
  min-height:24px;
  margin-top:14px;
}
.account-readout{color:var(--good);}
.error-readout{color:var(--danger);}

.footer-links{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
  margin-top:18px;
  padding-top:14px;
  border-top:1px solid var(--line);
}
.footer-links a{color:var(--blue);text-decoration:none;}

@media (max-width:620px){
  .login-shell{padding:10px;}
  .brand-row{align-items:flex-start;}
  h1{font-size:34px;}
  .top-tabs{grid-template-columns:1fr;}
  .password-line{align-items:stretch;}
}
.optional-note{
  color:var(--muted);
  font-weight:normal;
  font-size:13px;
}
.account-actions{
  margin-top:10px;
}
button:disabled{
  opacity:0.55;
  cursor:not-allowed;
}