:root{
  --paper:#efe9e2;
  --paper-raised:#f8f4ee;
  --ink:#20232b;
  --ink-soft:#4a4c56;
  --muted:#847c6d;
  --line:rgba(32,35,43,0.14);
  --accent:#9c7233;
  --accent-ink:#6b4f24;
  --shadow: 0 1px 2px rgba(32,25,15,0.06), 0 8px 24px -12px rgba(32,25,15,0.18);
}
*{box-sizing:border-box;}
body{
  margin:0;
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  background:var(--paper);
  color:var(--ink);
  font-family:-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
.portal-card{
  background:var(--paper-raised);
  border:1px solid var(--line);
  border-radius:16px;
  box-shadow:var(--shadow);
  padding:48px 44px;
  width:min(420px, 90vw);
  display:flex;
  flex-direction:column;
  align-items:center;
  text-align:center;
}
.portal-logo{ height:36px; width:auto; margin-bottom:14px; }
.portal-tagline{
  font-size:12px;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--muted);
  margin-bottom:36px;
}
.portal-message{ font-size:14px; color:var(--ink-soft); margin-bottom:28px; }
.portal-form{ width:100%; display:flex; flex-direction:column; gap:10px; }
.portal-label{ font-size:12.5px; color:var(--ink-soft); text-align:left; }
.portal-input{
  width:100%;
  padding:12px 14px;
  font-size:15px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing:0.04em;
  border:1px solid var(--line);
  border-radius:8px;
  background:#fff;
  color:var(--ink);
}
.portal-input:focus{ outline:2px solid var(--accent); outline-offset:1px; }
.portal-btn{
  margin-top:6px;
  padding:11px 16px;
  border:none;
  border-radius:8px;
  background:var(--ink);
  color:#fff;
  font-size:14px;
  font-weight:600;
  cursor:pointer;
}
.portal-btn:hover{ background:var(--accent-ink); }
.portal-back{
  display:inline-block;
  margin-top:8px;
  font-size:13px;
  color:var(--accent-ink);
  text-decoration:none;
}
.portal-back:hover{ text-decoration:underline; }