/* Phase 12: navigation and visual organization only; all original tools remain installed. */
#jv-v12-shell{max-width:1300px;margin:20px auto 14px;padding:24px;border:1px solid #dbe2f3;border-radius:22px;background:linear-gradient(125deg,#fff 65%,#f1f4ff);box-shadow:0 14px 36px rgba(26,42,83,.055);color:#1b2b4d;scroll-margin-top:18px}
.jv-v12-heading{display:flex;align-items:center;justify-content:space-between;gap:18px}.jv-v12-heading h2{font-size:clamp(1.25rem,2.5vw,1.8rem);line-height:1.2;margin:2px 0 6px}.jv-v12-heading p{margin:0;color:#63728f}.jv-v12-heading .jv-v12-kicker{font-size:.69rem;letter-spacing:.12em;font-weight:800;color:#4f46b8}
#jv-v12-progress{flex-shrink:0;border:1px solid #cfd7ef;border-radius:10px;background:white;padding:10px 14px;color:#263a6c;font-weight:700;cursor:pointer}
.jv-v12-tabs{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:22px}.jv-v12-tabs button{display:flex;align-items:flex-start;flex-direction:column;gap:5px;min-height:110px;padding:16px;border:1px solid #d8def0;border-radius:15px;background:#fff;color:#243457;text-align:left;cursor:pointer;transition:transform .16s,border-color .16s,box-shadow .16s}.jv-v12-tabs button:hover{transform:translateY(-2px);border-color:#a4b0e3;box-shadow:0 8px 18px rgba(34,53,120,.08)}.jv-v12-tabs button.active{background:#f1f0ff;border-color:#6d60c9;box-shadow:inset 0 0 0 1px #6d60c9}.jv-v12-tabs strong{font-size:.98rem}.jv-v12-tabs small{font-size:.78rem;color:#687896}.jv-v12-icon{font-size:1.25rem;color:#5449b4;line-height:1.1}
.jv-v12-tools{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:16px}.jv-v12-tools button{border:0;border-radius:10px;background:#4840a4;color:white;font-weight:750;padding:11px 16px;cursor:pointer}#jv-v12-status{font-size:.8rem;color:#697794}#jv-v12-progress-panel{margin-top:16px;border-top:1px solid #dce2f0;padding-top:12px}#jv-v12-progress-panel[hidden]{display:none}
/* Hide duplicated calls to action without deleting original controls or their handlers. */
.jv-v12-library .adaptive-banner,.jv-v12-library .immersive-entry{display:none!important}
#explore[hidden],#v8-workshop-entry[hidden],#jv-v11-panel[hidden],#v8-workshop[hidden],#immersive[hidden]{display:none!important}
#v8-workshop-entry,#jv-v11-panel,#v8-workshop{max-width:1300px;margin:14px auto 20px}
#jv-v11-panel .jv-v11-list{max-height:310px;overflow:auto}
@media(max-width:850px){.jv-v12-tabs{grid-template-columns:repeat(2,minmax(0,1fr))}.jv-v12-tabs button{min-height:96px}}
@media(max-width:520px){#jv-v12-shell{padding:16px}.jv-v12-heading{align-items:flex-start}.jv-v12-heading h2{font-size:1.3rem}.jv-v12-tabs{gap:8px}.jv-v12-tabs button{padding:12px;min-height:100px}.jv-v12-tabs strong{font-size:.86rem}.jv-v12-tabs small{font-size:.7rem}.jv-v12-tools{align-items:flex-start;flex-direction:column}}
@media(prefers-reduced-motion:reduce){.jv-v12-tabs button{transition:none}.jv-v12-tabs button:hover{transform:none}}