:root{--blue:#1677ff;--blue-50:#e8f1ff;--green:#16a34a;--text:#1f2328;--muted:#6b7280;--border:#e5e7eb;--bg:#f7f7f8;}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,system-ui,sans-serif;color:var(--text);background:var(--bg)}
button{font:inherit;cursor:pointer}
/* LMS shell */
.app{display:flex;min-height:100vh}
aside.sb{width:300px;flex:none;background:#fff;border-right:1px solid var(--border);min-height:100%}
.logo{display:flex;align-items:center;gap:8px;padding:16px 20px;height:64px}
.logo b{font-size:21px;font-weight:600;letter-spacing:-.02em}.logo sup{font-size:11px;color:#444;margin-left:-6px}
.sh{display:flex;justify-content:space-between;align-items:center;padding:15px 16px;background:#f7f8fa;border-top:1px solid #eef0f3;font-size:14px;font-weight:600}
.chev{width:9px;height:9px;border-right:1.6px solid #555;border-bottom:1.6px solid #555;transform:rotate(45deg);margin-top:-4px}
.chev.up{transform:rotate(-135deg);margin-top:4px}
.it{display:flex;gap:10px;padding:12px 16px;font-size:14px;border-right:3px solid transparent}
.it.active{background:var(--blue-50);border-right-color:var(--blue)}.it.active .it-t{color:var(--blue)}
.it-s{font-size:12px;color:var(--muted);margin-top:2px}
.st{width:13px;height:13px;border-radius:50%;flex:none;margin-top:3px}
.st.done{background:var(--green);position:relative}
.st.done:after{content:"";position:absolute;left:4px;top:2px;width:3px;height:6px;border:solid #fff;border-width:0 1.6px 1.6px 0;transform:rotate(45deg)}
.st.cur{border:2px solid #7aa9f7}.st.todo{border:2px solid #d8dbe0}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.top{height:64px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 22px;gap:18px}
.menu{width:32px;height:32px;border-radius:6px;background:#eef0f3;display:grid;place-items:center;font-size:16px}
.grow{flex:1}
.prog{display:flex;align-items:center;gap:8px;color:var(--blue);font-size:14px;font-weight:500}
.ring{width:30px;height:30px;border-radius:50%;background:conic-gradient(var(--blue) var(--p),#e5e7eb 0);display:grid;place-items:center}
.ring:after{content:"";width:24px;height:24px;border-radius:50%;background:#fff}
.lang{font-size:12px;font-weight:600;background:#f3f4f6;border-radius:6px;padding:7px 9px}
.user{display:flex;align-items:center;gap:8px;font-size:14px}
.av{width:28px;height:28px;border-radius:50%;background:#111;color:#fff;display:grid;place-items:center;font-size:12px}
.content{padding:30px 0 40px}
.wrap{max-width:880px;margin:0 auto;padding:0 20px}
.home{display:inline-flex;align-items:center;gap:8px;border:1px solid #cfd3d8;background:#fff;border-radius:4px;padding:9px 16px;font-size:14px;font-weight:500}
.crumbs{font-size:12.5px;color:#555;margin:16px 0 12px}.crumbs b{color:#222}
h1.pt{font-size:30px;font-weight:600;margin:10px 0 18px}
.media{position:relative;height:300px;border-radius:8px;overflow:hidden;background:radial-gradient(ellipse at 50% 30%,#2f4a52 0,#16262b 60%,#0b1417 100%)}
.media .play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:64px;height:64px;border-radius:12px;background:rgba(22,119,255,.85);display:grid;place-items:center}
.media .play:after{content:"";border-left:18px solid #fff;border-top:11px solid transparent;border-bottom:11px solid transparent;margin-left:5px}
.media .bar{position:absolute;left:24px;right:24px;bottom:18px;height:3px;background:rgba(255,255,255,.25);border-radius:2px}
.media .bar:before{content:"";position:absolute;left:0;top:0;bottom:0;width:30%;background:var(--blue);border-radius:2px}
.desc h3{font-size:18px;font-weight:600;margin:24px 0 6px}
.desc p{margin:0;font-size:16px;line-height:1.6;color:#444}
hr.sep{border:0;border-top:1px solid #e6e8eb;margin:24px 0}
/* scenario path card */
.path{background:#fff;border:1px solid var(--border);border-radius:8px;padding:14px 18px 8px}
.path-h{display:flex;justify-content:space-between;align-items:center;font-size:12px;font-weight:600;letter-spacing:.06em;color:#374151}
.path-h span{color:var(--muted);font-weight:500}
.path svg{display:block;width:100%;height:auto}
.mapw{position:relative;margin-top:6px}
.mtip{position:absolute;transform:translateY(-50%);width:250px;background:#1f2937;color:#fff;font-size:12.5px;line-height:1.45;border-radius:6px;padding:8px 11px;box-shadow:0 6px 16px rgba(0,0,0,.18);z-index:5}
.mtip b{display:block;font-size:11px;letter-spacing:.05em;text-transform:uppercase;color:#9ec2ff;margin-bottom:2px}
.mtip:before{content:"";position:absolute;left:-5px;top:50%;margin-top:-5px;width:10px;height:10px;background:#1f2937;transform:rotate(45deg)}
#tt{position:fixed;pointer-events:none;display:none;max-width:260px;background:#1f2937;color:#fff;font-size:12.5px;line-height:1.45;border-radius:6px;padding:8px 11px;z-index:99}
#tt b{display:block;font-size:11px;letter-spacing:.05em;text-transform:uppercase;color:#9ec2ff;margin-bottom:2px}
/* notice (designer style) */
.notice{display:flex;gap:10px;align-items:flex-start;background:#f3f4f6;border:1px solid #e5e7eb;border-radius:8px;padding:12px 14px;margin-top:14px}
.notice .dia{width:9px;height:9px;background:#0f4fb8;transform:rotate(45deg);margin-top:5px;flex:none}
.notice b{font-size:14px;display:block}.notice p{margin:2px 0 0;font-size:13px;color:#4b5563}
/* question card (LMS) */
.card{background:#fff;border:1px solid var(--border);border-radius:8px;padding:22px 24px;margin-top:14px}
.qh{display:flex;gap:10px;align-items:flex-start;font-size:18px;font-weight:600;line-height:1.4}
.qi{width:22px;height:22px;border:2px solid var(--blue);border-radius:4px;display:grid;place-items:center;color:var(--blue);font-size:12px;font-weight:700;flex:none;margin-top:2px}
.qs{font-size:14px;color:var(--muted);margin:10px 0 14px}
.key{display:flex;align-items:center;gap:10px;font-size:14.5px;font-weight:700;color:#111827;background:#f8fafc;border:2px solid #111827;border-radius:6px;padding:10px 14px;margin:0 0 16px}
.key i{width:10px;height:10px;background:#111827;transform:rotate(45deg);display:inline-block;flex:none}
.key span{font-weight:500;color:#374151}
.pchg{display:flex;align-items:center;gap:10px;margin-top:14px;font-size:14.5px;font-weight:700;color:#0f4fb8;background:#e8f1ff;border-radius:6px;padding:9px 14px}
.pchg i{width:9px;height:9px;background:#0f4fb8;transform:rotate(45deg);flex:none}
.opt{display:flex;align-items:center;gap:14px;border:1px solid #e3e6ea;border-radius:4px;padding:14px 16px;margin-bottom:10px;font-size:15px;background:#fff}
.radio{width:18px;height:18px;border-radius:50%;border:1.6px solid #c9ced5;flex:none}
.opt.sel{border-color:var(--blue);background:#f2f7ff}.opt.sel .radio{border:5px solid var(--blue)}
.opt.ok{border-color:#22c55e;background:#f3fbf6}.opt.bad{border-color:#ef4444;background:#fff6f6}
.mk{width:18px;text-align:center;font-weight:700;font-size:18px;flex:none}
.opt.ok .mk{color:#22c55e}.opt.bad .mk{color:#ef4444}
.tip{display:flex;gap:14px;align-items:flex-start;border:1.5px solid #facc15;border-radius:6px;padding:12px 16px;font-size:15px;line-height:1.5;margin-top:14px}
.tip .i{width:20px;height:20px;border-radius:50%;border:1.8px solid #eab308;color:#eab308;display:grid;place-items:center;font-size:12px;font-weight:700;flex:none;margin-top:1px}
.card-f{display:flex;justify-content:flex-end;margin-top:14px}
.foot{display:flex;justify-content:space-between;align-items:center;border-top:1px solid #e6e8eb;margin-top:30px;padding-top:22px}
.foot .prevl{font-size:14.5px;color:#666}
/* results */
.rbox{background:#fff;border:1px solid var(--border);border-radius:8px}
.r-top{text-align:center;padding:30px 30px 22px;border-bottom:1px solid #eceef1}
.r-ic{width:56px;height:56px;border-radius:12px;background:#dff6e7;display:grid;place-items:center;margin:0 auto 14px;font-size:24px;color:var(--green)}
.r-top h2{font-size:30px;margin:0 0 8px;font-weight:600}.r-top p{margin:0;color:#555;font-size:15px}
.r-mid{display:flex;justify-content:center;gap:56px;align-items:center;padding:30px;border-bottom:1px solid #eceef1}
.bigring{width:150px;height:150px;border-radius:50%;border:5px solid var(--blue);display:grid;place-items:center;text-align:center}
.bigring b{font-size:34px;font-weight:500;display:block}.bigring small{font-size:11px;letter-spacing:.08em;color:#444}
.kv{width:320px}.kv div{display:flex;justify-content:space-between;border-bottom:1px solid #d9dce0;padding:14px 0;font-size:13.5px}
.kv span{letter-spacing:.06em;color:#444}.kv b{font-size:15.5px}
.r-bot{text-align:center;padding:20px}
.yp{background:#fff;border:1px solid var(--border);border-radius:8px;margin-top:18px;padding:18px 20px}
.yp h3{margin:0 0 4px;font-size:17px;font-weight:600}
.yp .sub{font-size:13px;color:var(--muted);margin:0 0 10px}
.km{border-top:1px solid #eef0f3;margin-top:8px}
.km-r{display:grid;grid-template-columns:18px 170px 1fr;gap:12px;padding:12px 0;border-bottom:1px solid #f1f2f4;font-size:14px;align-items:start}
.km-r .d{width:9px;height:9px;background:#0f4fb8;transform:rotate(45deg);margin-top:6px}
.km-r .d.o{background:#fff;border:1.6px solid #9ca3af}
.km-r b{font-size:13.5px}.km-r small{display:block;color:var(--muted);font-size:12px;margin-top:2px}
.km-r .a{color:#333}.km-r .a em{color:#555}
.km-r .a div+div{margin-top:4px;color:var(--muted);font-size:13px}
.yp-f{display:flex;justify-content:space-between;align-items:center;margin-top:12px;font-size:13px;color:var(--muted)}

.btn{display:inline-flex;align-items:center;gap:8px;border-radius:4px;padding:10px 20px;font-size:15px;font-weight:500;border:1px solid transparent;white-space:nowrap}
.btn.pri{background:var(--blue);color:#fff}.btn.sec{background:#fff;border-color:#cfd3d8;color:#222}.btn.dis{background:#fff;border-color:#e2e5e9;color:#b6bbc2}
/* ---------- site additions ---------- */
.it{cursor:pointer}
.btn{cursor:pointer}.btn.dis{cursor:default}
button.btn{font:inherit}
.home{cursor:pointer}
.opt{cursor:pointer;width:100%;text-align:left;font:inherit;color:inherit}
.opt:hover:not(.locked){border-color:#b9c7dc}
.opt.locked{cursor:default}
.prevl{background:none;border:0;padding:0}
.prevl.dis{color:#c4c8ce;cursor:default}
.media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.prac{display:flex;gap:10px;align-items:center;background:#f3f4f6;border:1px solid #e5e7eb;border-radius:8px;padding:10px 14px;margin-bottom:14px;font-size:13.5px;color:#374151}
.prac b{font-weight:700}
.readonly{font-size:13px;color:var(--muted);margin-top:10px}
.menu{cursor:pointer;border:0}
.path svg [data-tip]{cursor:help}
@media (max-width:900px){
  aside.sb{position:fixed;left:0;top:0;bottom:0;z-index:40;transform:translateX(-100%);transition:transform .2s;box-shadow:0 0 30px rgba(0,0,0,.15)}
  .app.nav-open aside.sb{transform:none}
  .content{padding:20px 0 30px}
  .wrap{padding:0 16px}
  h1.pt{font-size:24px}
  .media{height:200px}
  .r-mid{flex-direction:column;gap:24px}
  .kv{width:100%}
  .km-r{grid-template-columns:14px 1fr}
  .km-r .a{grid-column:2}
  .user span.nm{display:none}
  .path{padding:12px 10px 6px}
  .mapw{overflow-x:auto;-webkit-overflow-scrolling:touch}
  .mapw svg{min-width:640px}
  .key{display:block}.key i{display:inline-block;margin-right:8px}
}
.media{background:#e9ecef}
.media .ph{position:absolute;inset:0;display:grid;place-items:center;color:#adb5bd}
.media.has-img .ph{display:none}
.media{height:auto;aspect-ratio:16/9}
@media (max-width:900px){.media{height:auto}}
.sb-wrap{max-width:560px;margin:0 auto;padding:18px 24px 6px}
.sb-h{font-size:12px;font-weight:700;letter-spacing:.06em;color:#374151;text-transform:uppercase;margin-bottom:6px}
.sb-r{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px solid #f0f1f3;font-size:14px}
.sb-r em{font-style:normal;font-size:12px;color:var(--muted);margin-left:6px}
.sb-r b{white-space:nowrap}.sb-r b.lost{color:#374151}.sb-r small{color:#b45309;font-weight:600;margin-left:4px}
.sb-r.tot{border-bottom:0;font-weight:700}
.sb-n{font-size:12.5px;color:var(--muted);margin:6px 0 0}
.desc .lead{margin-top:12px;font-weight:600;color:#374151}
.desc ul{margin:6px 0 0;padding-left:22px;color:#444;font-size:16px;line-height:1.6}
.card .qh{margin-bottom:16px}
.opt.has-fb{margin-bottom:0;border-bottom-left-radius:0;border-bottom-right-radius:0}
.fbk{display:flex;gap:10px;align-items:flex-start;background:#f7f8fa;border:1px solid #e3e6ea;border-top:0;border-left:3px solid #9ca3af;border-radius:0 0 4px 4px;padding:11px 14px;margin-bottom:10px;font-size:14.5px;line-height:1.5;color:#374151}
.fbk .fi{color:#6b7280;flex:none;margin-top:2px;display:flex}
.fbk.turn{border-left-color:var(--lc,#1677ff)}.fbk.turn .fi{color:var(--lc,#1677ff)}
.rst{background:none;border:1px solid #d1d5db;border-radius:6px;padding:6px 10px;font-size:13px;color:#374151}
.rst:hover{border-color:#9ca3af}
.logo img{height:30px;width:auto;display:block}
.app.nav-hidden aside.sb{display:none}

.media video{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;background:#000;display:block}

/* login */
html.locked #root,html.locked #tt{display:none}
#login{position:fixed;inset:0;background:#fff;display:flex;align-items:center;justify-content:center;padding:16px;z-index:50;overflow:auto}
.lg{width:100%;max-width:360px;display:flex;flex-direction:column;gap:14px}
.lg-logo{height:40px;width:auto;align-self:center;margin-bottom:18px}
.lg h1{font-size:22px;font-weight:600;margin:0 0 4px;text-align:center;color:#111827}
.lg label{display:flex;flex-direction:column;gap:6px;font-size:13.5px;font-weight:500;color:#374151}
.lg input{font:inherit;font-size:15px;font-weight:400;padding:10px 12px;border:1px solid #cfd3d8;border-radius:6px;outline:none;color:#111827;background:#fff}
.lg input:focus{border-color:#1677ff;box-shadow:0 0 0 3px rgba(22,119,255,.15)}
.lg-err{min-height:18px;font-size:13px;color:#ef4444;margin:-4px 0 -6px}
.lg .btn{width:100%;justify-content:center;padding:11px 16px;font-size:15px}