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1px);background-size:36px 36px;-webkit-mask-image:radial-gradient(circle at 50% 45%,rgba(0,0,0,.9),transparent 80%);mask-image:radial-gradient(circle at 50% 45%,rgba(0,0,0,.9),transparent 80%)}.login-gate-card{position:relative;z-index:1;width:min(100%,430px);padding:28px 26px 22px;background:#151922f5;border:1px solid var(--edg-border-strong);border-radius:16px;box-shadow:0 24px 60px #000000a6,0 0 0 1px #3897f014;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);display:flex;flex-direction:column;gap:20px}@keyframes loginCardShake{0%,to{transform:translate(0)}20%{transform:translate(-6px)}40%{transform:translate(6px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}}.login-gate-card.is-shake{animation:loginCardShake .34s ease}.login-gate-header{display:flex;flex-direction:column;gap:6px}.login-gate-brand-row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:6px}.login-brand-mark{width:44px;height:44px;border-radius:12px}.login-restricted-pill{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:999px;font-size:11px;font-weight:600;color:#93c5fd;background:#3897f021;border:1px solid rgba(56,151,240,.34)}.login-gate-header h1{margin:0;font-size:19px;font-weight:700;letter-spacing:-.015em;line-height:1.25;color:#f8fafc}.login-gate-subtitle{margin:2px 0 0;font-size:13px;line-height:1.5;color:var(--edg-muted)}.login-gate-form{display:flex;flex-direction:column;gap:14px}.login-field-group{display:flex;flex-direction:column;gap:6px}.login-field-group label{font-size:12.5px;font-weight:600;color:#cbd5e1}.login-input-wrap{position:relative;display:flex;align-items:center}.login-input-icon{position:absolute;left:13px;color:var(--edg-muted);pointer-events:none}.login-input-wrap input{width:100%;height:44px;padding:0 42px 0 38px;border-radius:10px;border:1px solid var(--edg-border-strong);background:#0e121a;color:#f8fafc;font-size:16px;transition:border-color .15s ease,box-shadow .15s ease}.login-input-wrap input::placeholder{color:#64748b;font-size:14px}.login-input-wrap input:focus{outline:none;border-color:var(--edg-accent);box-shadow:0 0 0 3px #3897f033}.login-toggle-pass-btn{position:absolute;right:8px;width:32px;height:32px;border-radius:7px;border:none;background:transparent;color:var(--edg-muted);display:grid;place-items:center;transition:color .14s ease,background .14s ease}.login-toggle-pass-btn:hover{color:#f8fafc;background:#ffffff0f}.login-error-banner{display:flex;align-items:center;gap:8px;padding:9px 12px;border-radius:9px;background:#f8717124;border:1px solid rgba(248,113,113,.42);color:#fecaca;font-size:12.5px;line-height:1.4}.login-submit-btn{margin-top:2px;height:45px;width:100%;border-radius:10px;border:1px solid rgba(56,151,240,.7);background:linear-gradient(135deg,#2563eb,#3897f0);color:#fff;font-size:14px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;gap:8px;box-shadow:0 8px 20px #2563eb47;transition:filter .15s ease,transform .12s ease}.login-submit-btn:hover{filter:brightness(1.08)}.login-submit-btn:active{transform:translateY(1px)}.login-gate-footer{padding-top:14px;border-top:1px solid var(--edg-border);display:flex;align-items:center;justify-content:center;gap:7px;font-size:11.5px;color:var(--edg-muted);text-align:center}.btn-logout-top{display:inline-flex;align-items:center;gap:5px;padding:6px 10px;border-radius:8px;border:1px solid var(--edg-border);background:#1c212ca6;color:var(--edg-muted);font-size:12px;font-weight:600;transition:all .15s ease}.btn-logout-top:hover{color:#fecaca;border-color:#f8717180;background:#f871711f}@media(max-width:1180px){.ct-main-grid,.teaching-grid{grid-template-columns:1fr}}@media(max-width:768px){.atlas-topbar{padding:10px 12px;gap:10px}.atlas-brand h1{font-size:14.5px}.atlas-areas{width:100%;display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.area-tab-btn{padding:7px 10px;justify-content:center}.area-tab-btn small,.modality-tab-btn small{display:none}.topbar-right-actions{width:100%;justify-content:space-between;flex-wrap:wrap;gap:8px}.atlas-subbar{padding:8px 12px}.atlas-modalities{width:100%;display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.modality-tab-btn{justify-content:center}.atlas-main-content{padding:10px 10px 20px}.mpr-secondary-pair{grid-template-columns:1fr}.ct-col-3d,.scene3d-stage-wrap,.scene3d-canvas{min-height:340px}.login-gate-card{padding:22px 18px 18px}.login-gate-header h1{font-size:17px}}