/* Shared install dialog; every rule is scoped so admin and student shells stay independent. */
.install-guide{--install-border:var(--bd,var(--line,#29413c));width:min(560px,calc(100% - 28px));max-height:85dvh;overflow-y:auto;padding:24px;box-sizing:border-box;border:1px solid var(--install-border);border-radius:20px;background:var(--card);color:var(--tx);animation:install-in .24s ease-out}.install-guide::backdrop{background:rgba(0,0,0,.6);backdrop-filter:blur(4px)}.install-head{display:flex;align-items:center;gap:14px}.install-head img{border-radius:14px}.install-head h2{font-size:22px;margin:4px 0}.install-head .ib{margin-left:auto;flex-shrink:0}.install-guide .eyebrow{font-size:10px;font-weight:600;letter-spacing:1px;color:var(--pr)}.install-tabs{display:flex;gap:6px;margin:20px 0 14px}.install-tabs button{flex:1;padding:10px 6px;border:1px solid var(--install-border);border-radius:10px;background:var(--bg);color:var(--tx);font:inherit;font-size:12px;cursor:pointer}.install-tabs button[aria-selected=true]{border-color:var(--pr);color:var(--pr);background:var(--prl)}.install-note{font-size:12px;line-height:1.6}.install-step-list{list-style:none;margin:0;padding:0}.install-step-list li{display:flex;gap:12px;padding:14px 0;margin:0;border-bottom:1px solid var(--install-border);line-height:1.5}.install-step-number{flex:0 0 28px;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;color:var(--pr);background:var(--prl);font-size:13px;font-weight:700}.install-step-list b{display:flex;align-items:center;gap:8px;font-size:14px}.install-step-list p{margin:6px 0 0;color:var(--mu);font-size:13px;line-height:1.6}.install-guide svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.install-ready{display:flex;align-items:center;gap:10px;padding:14px;border:1px solid var(--install-border);border-radius:12px;background:var(--prl);color:var(--pr);font-size:13px;line-height:1.6}.install-copy{display:flex;flex-direction:column;gap:10px;margin-top:20px;font-size:12px;color:var(--mu)}.install-copy small:empty{display:none}.install-guide .btn{display:flex;align-items:center;justify-content:center;width:100%;min-height:46px;box-sizing:border-box;transition:transform .18s,background-color .18s}.install-guide .btn:active{transform:scale(.98)}.install-guide .mu{line-height:1.7;margin:12px 0}.install-guide .btn:disabled{opacity:.6}.install-guide .ib{width:36px;height:36px;display:grid;place-items:center;background:none;border:0;border-radius:10px;color:var(--mu);font:inherit;cursor:pointer}.install-guide .ib:hover{background:var(--prl)}.install-guide .btn:focus-visible,.install-tabs button:focus-visible{outline:2px solid var(--pr);outline-offset:2px}html:has(.install-guide[open]){overflow:hidden;overscroll-behavior:none}.install-guide{overscroll-behavior:contain}@keyframes install-in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}@media(max-width:600px){.install-guide{padding:18px}.install-head h2{font-size:19px}.install-head img{width:44px;height:44px}.install-head{gap:10px}}@media(prefers-reduced-motion:reduce){.install-guide{animation:none}.install-guide .btn{transition:none;transform:none}}