.portal-body{background:linear-gradient(180deg,#f5fafd 0%,#fff 40%);min-height:100vh;}
.portal-wrap{position:relative;overflow:visible;width:min(100% - 32px,920px);margin:40px auto 80px;}
.portal-mark{
  position:absolute;left:50%;top:46%;z-index:0;pointer-events:none;
  transform:translate(-50%,-50%);
}
.portal-mark img{
  width:min(640px,92vw);height:auto;
  opacity:.2;mix-blend-mode:multiply;filter:none;
}
.portal-card{position:relative;z-index:1;background:rgba(255,255,255,.9);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-md);padding:clamp(22px,4vw,36px);}
.portal-card input,.portal-card select{background:#fff;}
.portal-tabs{display:flex;gap:8px;margin:0 0 22px;flex-wrap:wrap;}
.portal-tabs button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:.55em 1.1em;font-family:"Sora",sans-serif;font-weight:600;color:var(--brand-800);cursor:pointer;}
.portal-tabs button.is-active{background:var(--grad-brand);color:#fff;border-color:transparent;}
.portal-panel{display:none;}
.portal-panel.is-active{display:block;}
.portal-panel .btn{margin-top:16px;}
.portal-notice{background:var(--brand-50);border:1px solid var(--line);border-radius:14px;padding:14px 16px;color:var(--muted);font-size:.95rem;margin-bottom:20px;}
.portal-status{min-height:1.4em;margin:12px 0 0;font-weight:600;}
.portal-status.is-error{color:var(--wine-600);}
.portal-status.is-ok{color:#0f6b3b;}
.portal-toolbar{display:flex;justify-content:space-between;gap:16px;align-items:center;flex-wrap:wrap;margin-bottom:22px;}
.study-list{display:grid;gap:16px;}
.study-card{border:1px solid var(--line);border-radius:18px;padding:18px 20px;background:#fff;display:grid;gap:8px;}
.study-card h3{margin:0;font-size:1.1rem;}
.study-meta{display:flex;flex-wrap:wrap;gap:10px 16px;color:var(--muted);font-size:.92rem;}
.study-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px;}
.portal-empty{text-align:center;padding:40px 16px;color:var(--muted);}
.hidden{display:none !important;}
.visor-shell{min-height:100vh;background:#0e2540;color:#fff;display:flex;flex-direction:column;}
.visor-bar{display:flex;justify-content:space-between;gap:16px;align-items:center;padding:14px 20px;background:#12283f;border-bottom:1px solid rgba(255,255,255,.08);}
.visor-bar a{color:#8fc9ee;}
.visor-body{flex:1;padding:28px 20px;display:grid;place-items:center;}
.visor-card{max-width:640px;background:#16314d;border:1px solid rgba(255,255,255,.12);border-radius:20px;padding:28px;}
.visor-card code{display:block;margin:10px 0;padding:10px;background:#0e2540;border-radius:8px;overflow:auto;color:#c2e0f4;}
@media (max-width:680px){
  .portal-toolbar{align-items:flex-start;}
}