:root{--ink:#0f172a;--ink2:#334155;--mute:#64748b;--line:#e2e8f0;--bg:#f8fafc;--card:#fff;--brand:#0f766e;--brand2:#115e59;--brandbg:#f0fdfa;--ok:#15803d;--okbg:#dcfce7;--warn:#b45309;--warnbg:#fef3c7;--bad:#b91c1c;--badbg:#fee2e2;--info:#1d4ed8;--infobg:#dbeafe;--r:10px}
*{box-sizing:border-box}html,body{margin:0}body{font:15px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--brand)}h1,h2,h3{line-height:1.2;margin:0 0 .5em}h1{font-size:2.4rem;letter-spacing:-.02em}h2{font-size:1.6rem;letter-spacing:-.01em}h3{font-size:1.1rem}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.nav{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}.nav .wrap{display:flex;align-items:center;gap:20px;height:60px}
.logo{display:flex;align-items:center;text-decoration:none;color:var(--ink)}
.nav .links{margin-left:auto;display:flex;gap:18px;align-items:center}.nav .links a{color:var(--ink2);text-decoration:none;font-size:.95rem}.nav .links a.on{color:var(--brand);font-weight:600}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--brand);background:var(--brand);color:#fff!important;padding:10px 16px;border-radius:8px;font-weight:600;text-decoration:none;cursor:pointer;font-size:.95rem}
.btn:hover{background:var(--brand2)}.btn.ghost{background:#fff;color:var(--brand)!important}.btn.sm{padding:6px 10px;font-size:.85rem}.btn.bad{background:var(--bad);border-color:var(--bad)}.btn.lg{padding:14px 22px;font-size:1.05rem}
.hero{background:linear-gradient(180deg,#fff,var(--brandbg));padding:72px 0 56px;border-bottom:1px solid var(--line)}.hero p.lead{font-size:1.2rem;color:var(--ink2);max-width:640px}
.kicker{display:inline-block;background:var(--brandbg);color:var(--brand2);border:1px solid #99f6e4;padding:3px 10px;border-radius:99px;font-size:.8rem;font-weight:600;margin-bottom:14px}
.grid{display:grid;gap:18px}.g2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}.g3{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}.g4{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px}.card.flat{box-shadow:none}
section.blk{padding:56px 0}.muted{color:var(--mute)}.small{font-size:.85rem}
.price{border:1px solid var(--line);border-radius:14px;background:#fff;padding:28px}.price.pop{border:2px solid var(--brand);position:relative}.price .amt{font-size:2.6rem;font-weight:800}.price ul{padding-left:18px}.price li{margin:6px 0}
.tag{position:absolute;top:-12px;left:24px;background:var(--brand);color:#fff;font-size:.75rem;font-weight:700;padding:3px 10px;border-radius:99px}
.chip{display:inline-block;padding:2px 9px;border-radius:99px;font-size:.78rem;font-weight:600;white-space:nowrap}.c-ok{background:var(--okbg);color:var(--ok)}.c-warn{background:var(--warnbg);color:var(--warn)}.c-bad{background:var(--badbg);color:var(--bad)}.c-info{background:var(--infobg);color:var(--info)}.c-mute{background:#f1f5f9;color:var(--mute)}.c-cls{background:var(--brandbg);color:var(--brand2);border:1px solid #99f6e4;margin:1px 0}.ex{display:inline-block;background:#fef3c7;color:#78350f;border:1px dashed #d97706;font-size:.72rem;font-weight:700;padding:1px 8px;border-radius:99px;letter-spacing:.04em;vertical-align:middle}
table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line);vertical-align:middle}th{font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;color:var(--mute);font-weight:600}
.metric .v{font-size:1.9rem;font-weight:800}.metric .l{color:var(--mute);font-size:.85rem}
.notice{border-radius:8px;padding:12px 14px;font-size:.9rem}.n-warn{background:var(--warnbg);color:#78350f}.n-info{background:var(--infobg);color:#1e3a8a}.n-bad{background:var(--badbg);color:#7f1d1d}.n-ok{background:var(--okbg);color:#14532d}
input,select,textarea{font:inherit;padding:9px 10px;border:1px solid #cbd5e1;border-radius:8px;width:100%;background:#fff}label{font-size:.85rem;font-weight:600;color:var(--ink2);display:block;margin-bottom:4px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.sp{flex:1}
.foot{border-top:1px solid var(--line);padding:28px 0;color:var(--mute);font-size:.85rem;background:#fff}
.demo-bar{background:#fef3c7;color:#78350f;border-bottom:1px dashed #d97706;font-size:.82rem;text-align:center;padding:7px 10px}.demo-bar a{color:#92400e;font-weight:700}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:8px;overflow:hidden}.seg button{border:0;background:#fff;padding:7px 14px;cursor:pointer;font:inherit;font-size:.9rem}.seg button.on{background:var(--brand);color:#fff}
.lesson{border:1px solid var(--line);border-radius:10px;background:#fff;margin-bottom:10px}.lesson summary{padding:14px 16px;cursor:pointer;font-weight:600;display:flex;gap:10px;align-items:center}.lesson .bd{padding:0 16px 14px 44px;color:var(--ink2)}.lesson .num{width:24px;height:24px;border-radius:99px;background:var(--brandbg);color:var(--brand2);display:grid;place-items:center;font-size:.8rem;flex:none}
.q{margin-bottom:16px}.q .opt{display:flex;gap:8px;align-items:flex-start;padding:8px 10px;border:1px solid var(--line);border-radius:8px;margin:6px 0;cursor:pointer;background:#fff}.q .opt input{width:auto;margin-top:4px}.q .opt.right{border-color:var(--ok);background:var(--okbg)}.q .opt.wrong{border-color:var(--bad);background:var(--badbg)}

@media print{.chip{border:1px solid #94a3b8}.noprint,.nav,.demo-bar,.foot{display:none!important}body{background:#fff}}

/* LiftRoster wordmark */
.wm{display:inline-flex;align-items:center;gap:9px;height:var(--h,28px)}.wm svg{height:100%;width:auto;flex:none}.wm b{font-weight:800;font-size:calc(var(--h,28px)*.72);letter-spacing:-.02em;color:var(--ink);line-height:1}.wm b span{color:var(--brand)}
.menu-btn{display:none;margin-left:auto;background:#fff;border:1px solid var(--line);border-radius:8px;font-size:1.2rem;padding:4px 10px;cursor:pointer}
.who{max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
dialog{border:0;border-radius:14px;max-width:520px;width:94%;padding:20px;max-height:92vh;overflow:auto}dialog::backdrop{background:rgba(15,23,42,.45)}
.toast{position:fixed;left:50%;bottom:22px;transform:translateX(-50%);background:#0f172a;color:#fff;padding:10px 16px;border-radius:10px;font-weight:600;font-size:.9rem;z-index:50;transition:opacity .3s;opacity:0;max-width:92vw}.toast.bad{background:var(--bad)}
.tabs{display:flex;border:1px solid var(--line);border-radius:10px;overflow:hidden;margin-bottom:16px}.tabs button{flex:1;border:0;background:#fff;padding:11px;font:inherit;font-weight:600;cursor:pointer;color:var(--ink2)}.tabs button.on{background:var(--brand);color:#fff}
.oplist .op{display:grid;grid-template-columns:1.4fr 1.6fr .6fr 1.1fr 1fr auto;gap:10px;align-items:center;padding:12px 4px;border-bottom:1px solid var(--line)}.oplist .hd{font-size:.75rem;text-transform:uppercase;letter-spacing:.04em;color:var(--mute);font-weight:600;padding-top:0}
.oplist .acts{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}.lbl-m{display:none}
.cls-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px 10px}.cls-grid label{display:flex;gap:6px;font-weight:500;margin:0;align-items:flex-start}.cls-grid input{width:auto;margin-top:4px}
.empty{border:2px dashed var(--line);border-radius:12px;padding:26px;text-align:center;color:var(--mute)}
.twocol{display:grid;grid-template-columns:2fr 1fr;gap:18px;align-items:start}
.authwrap{max-width:460px;margin:0 auto;padding:30px 18px 60px}
@media(max-width:860px){.twocol{grid-template-columns:1fr}
 .oplist .op{grid-template-columns:1fr auto;gap:4px 10px;padding:14px 2px}.oplist .hd{display:none}.oplist .op>div{grid-column:1/2}.oplist .op>.st{grid-column:2/3;grid-row:1/2;justify-self:end}.oplist .op>.acts{grid-column:1/3;justify-content:flex-start}.lbl-m{display:inline;color:var(--mute);font-size:.8rem}}
@media(max-width:720px){h1{font-size:1.8rem}.hero{padding:40px 0 32px}.menu-btn{display:block}.nav .links{display:none;position:absolute;top:60px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start;padding:12px 20px;gap:12px}
 body.menu-open .nav .links{display:flex}.nav .wrap{position:relative}.btn{min-height:42px}.btn.sm{min-height:34px}input,select,textarea{font-size:16px}}
.nav.pub .links{display:flex!important;position:static;flex-direction:row;align-items:center;padding:0;border:0;background:none}
@media(max-width:720px){.hide-m{display:none!important}.nav.pub .links{gap:10px}}

@media(max-width:720px){.g4{grid-template-columns:1fr 1fr;gap:10px}.metric{padding:12px 14px}.metric .v{font-size:1.5rem}}

.pw-wrap{position:relative}.pw-wrap input{padding-right:46px}.pw-eye{position:absolute;top:50%;right:4px;transform:translateY(-50%);width:38px;height:38px;display:flex;align-items:center;justify-content:center;border:0;border-radius:6px;background:transparent;color:var(--mute);cursor:pointer;padding:0}.pw-eye:hover{color:var(--ink2);background:var(--bg)}.pw-eye:focus-visible{outline:2px solid var(--brand);outline-offset:1px;color:var(--brand)}
.pw-err{color:var(--bad);margin-top:6px;font-weight:600}input.pw-bad{border-color:var(--bad)}
.lesson .l-lead{margin:0 0 10px;font-size:1.02rem;color:var(--ink)}.lesson .bd h3{font-size:1rem;margin:16px 0 6px;color:var(--ink)}.lesson .l-know{margin-top:14px;font-size:.78rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--brand2)}.lesson .bd ul{margin:0;padding-left:20px}.lesson .bd li{margin:4px 0;line-height:1.45}
.lfig{margin:14px 0}.lfig a{display:block;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff}.lfig img{display:block;width:100%;height:auto;max-width:560px;margin:0 auto}
.lesson .l-dd{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}.lesson .l-dd>div{border-radius:10px;padding:2px 14px 12px}.lesson .l-dd h3{margin-top:10px}.lesson .l-do{background:var(--okbg)}.lesson .l-do h3{color:var(--ok)}.lesson .l-dont{background:var(--badbg)}.lesson .l-dont h3{color:var(--bad)}
.lesson .l-ex{margin-top:12px;padding:10px 14px;border-left:4px solid var(--brand);background:var(--brandbg);border-radius:0 10px 10px 0}.lesson .l-keys{margin-top:12px;padding:2px 14px 12px;border:1px solid var(--line);border-radius:10px;background:var(--bg)}.lesson .l-keys h3{margin-top:10px}
@media(max-width:720px){.lesson .bd{padding:0 14px 14px}.lesson .l-dd{grid-template-columns:1fr}}
/* Live dashboard */
.live-ind{display:inline-flex;align-items:center;gap:6px;font-size:.76rem;font-weight:600;padding:2px 10px;border-radius:99px;vertical-align:middle;background:#f1f5f9;color:var(--mute);white-space:nowrap}
.live-ind i{width:8px;height:8px;border-radius:50%;background:#94a3b8;display:inline-block;flex:none}
.live-ind .li-t{font-weight:500;opacity:.85}
.live-ind.li-on{background:var(--okbg);color:var(--ok)}.live-ind.li-on i{background:#16a34a;animation:lrpulse 2s infinite}
.live-ind.li-poll{background:var(--infobg);color:var(--info)}.live-ind.li-poll i{background:var(--info)}
.live-ind.li-off{background:var(--badbg);color:var(--bad)}.live-ind.li-off i{background:var(--bad)}
@keyframes lrpulse{0%{box-shadow:0 0 0 0 rgba(22,163,74,.55)}70%{box-shadow:0 0 0 7px rgba(22,163,74,0)}100%{box-shadow:0 0 0 0 rgba(22,163,74,0)}}
.feed{margin-top:6px}.feed .ev{display:flex;gap:10px;align-items:flex-start;padding:8px 6px;border-bottom:1px solid var(--line);border-radius:6px}
.feed .ev:last-child{border-bottom:0}.feed .ev-b{flex:1;min-width:0}
.ev-dot{width:10px;height:10px;border-radius:50%;margin-top:6px;flex:none}.d-ok{background:#16a34a}.d-bad{background:var(--bad)}.d-info{background:var(--info)}.d-warn{background:#d97706}
.new-chip{font-size:.66rem;padding:1px 6px;letter-spacing:.05em;margin-right:2px}
.is-new.new-ok{background:#f0fdf4}.is-new.new-bad{background:#fef2f2;box-shadow:inset 3px 0 0 var(--bad)}
.op.is-new.new-ok{box-shadow:inset 3px 0 0 var(--ok)}
.flash.new-ok{animation:lrflashok 4s ease-out}.flash.new-bad{animation:lrflashbad 4s ease-out}
@keyframes lrflashok{0%,35%{background:#bbf7d0}100%{background:#f0fdf4}}
@keyframes lrflashbad{0%,35%{background:#fecaca}100%{background:#fef2f2}}
.new-defect{border:2px solid var(--bad);background:var(--badbg);color:#7f1d1d;border-radius:var(--r);padding:12px 16px;margin-bottom:12px}
.new-defect.flash{animation:lrdefect 1s ease-out 3}
.new-defect .nd-h{display:flex;align-items:center;gap:10px;font-size:1.05rem}.new-defect .nd-row{margin-top:6px}
.nd-dot{width:12px;height:12px;border-radius:50%;background:var(--bad);animation:lrpulsebad 1.6s infinite;flex:none}
@keyframes lrdefect{0%{box-shadow:0 0 0 0 rgba(185,28,28,.55)}100%{box-shadow:0 0 0 14px rgba(185,28,28,0)}}
@keyframes lrpulsebad{0%{box-shadow:0 0 0 0 rgba(185,28,28,.6)}70%{box-shadow:0 0 0 8px rgba(185,28,28,0)}100%{box-shadow:0 0 0 0 rgba(185,28,28,0)}}
/* Office screen: use more of a wide monitor */
@media(min-width:1440px){body.dash .wrap{max-width:1400px}}
@media(prefers-reduced-motion:reduce){.live-ind i,.nd-dot,.flash,.new-defect.flash{animation:none!important}}
@media print{.live-ind,#fresh{display:none!important}}
.twocol>*{min-width:0}
@media(max-width:720px){.op .chip{white-space:normal}.live-ind .li-t{display:none}}
@media(max-width:860px){body.dash .twocol>.grid{order:-1}}

/* Explainer video (click-to-play YouTube facade) */
.vid-sec{padding-top:44px}.vid-head{max-width:760px;margin:0 auto 20px;text-align:center}.vid-head h2{margin:6px 0 8px}
.yt-facade{position:relative;max-width:900px;margin:0 auto;aspect-ratio:16/9;border-radius:14px;overflow:hidden;background:#0f172a;box-shadow:0 18px 40px -18px rgba(15,23,42,.45);border:1px solid var(--line)}
.yt-facade iframe,.yt-play,.yt-play img{position:absolute;inset:0;width:100%;height:100%;border:0}
.yt-play{padding:0;margin:0;background:none;cursor:pointer;display:block}.yt-play img{object-fit:cover;transition:transform .3s,filter .3s}
.yt-play:hover img,.yt-play:focus-visible img{transform:scale(1.02);filter:brightness(.92)}
.yt-btn{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);filter:drop-shadow(0 4px 10px rgba(0,0,0,.35));transition:transform .2s}
.yt-play:hover .yt-btn{transform:translate(-50%,-50%) scale(1.08)}.yt-play:focus-visible{outline:3px solid var(--brand);outline-offset:3px}
.yt-len{position:absolute;right:12px;bottom:12px;background:rgba(15,23,42,.85);color:#fff;font-size:.8rem;font-weight:600;padding:3px 8px;border-radius:6px}
.vid-alt{text-align:center;margin-top:12px}
@media(max-width:720px){.vid-sec{padding:32px 0 36px}.yt-facade{border-radius:10px}.yt-btn svg{width:56px;height:40px}}