:root{--bg:#0b1020;--panel:#172035;--panel2:#1e2940;--line:#344461;--gold:#e6c67a;--lav:#b6a4ff;--text:#f0f0f6;--muted:#a2afc8;--cyan:#83d8ed;--red:#f2a0ae;--green:#93d9bd;font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;color:var(--text);background:var(--bg);color-scheme:dark}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 80% 0,#222342 0,transparent 55%),#0b1020;min-height:100vh}button,input,select,textarea{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer;color:inherit;border:0;background:none}button:disabled{opacity:.45;cursor:not-allowed}button:focus-visible,a:focus-visible{outline:2px solid var(--lav);outline-offset:4px}a{color:var(--gold)}h1,h2,h3,p{margin-top:0}h1{font-size:32px;font-weight:600;letter-spacing:1px;margin-bottom:12px}h2{font-size:20px;margin-bottom:18px}h3{font-size:16px;margin-bottom:10px}p{line-height:1.8}small{color:var(--muted)}.muted{color:var(--muted)}.gold{color:var(--gold)}.eyebrow{font-size:11px;color:var(--gold);letter-spacing:3px;text-transform:uppercase}.demo-strip{background:#20243b;color:#c2bbdb;font-size:11px;text-align:center;padding:8px 16px;letter-spacing:.4px}.shell{max-width:1480px;margin:auto;display:grid;grid-template-columns:238px minmax(0,1fr);min-height:calc(100vh - 31px)}.sidebar{padding:34px 22px;border-right:1px solid #29344d;background:#0e1527cc;position:sticky;top:0;height:100vh;display:flex;flex-direction:column;gap:27px}.brand{display:flex;align-items:center;gap:11px;font-size:22px;letter-spacing:2px;text-align:left;white-space:nowrap}.logo{width:37px;height:37px;display:inline-grid;place-items:center;border:1px solid #c6af70;border-radius:50%;transform:rotate(-18deg);color:var(--gold);font-size:24px}.brand small{display:block;font-size:9px;letter-spacing:2px;margin-top:4px;color:#afbbd0}.profile{display:flex;align-items:center;gap:12px}.avatar{display:grid;place-items:center;width:43px;height:43px;flex-shrink:0;border-radius:50%;background:linear-gradient(145deg,#6972b5,#343b68);border:1px solid #a39ae8;font-size:22px}.profile strong{font-size:14px;display:block}.profile small{font-size:11px}.side-nav{display:flex;flex-direction:column;gap:7px}.nav-item{display:flex;align-items:center;gap:15px;padding:13px 17px;border-radius:10px;text-align:left;font-size:14px;color:#aebbd1}.nav-item.active{background:linear-gradient(90deg,#393441,#25293a);color:var(--gold);box-shadow:inset 2px 0 var(--gold)}.nav-item:hover{background:#293148}.icon{width:22px;height:22px;display:inline-block;flex-shrink:0}.sidebar-foot{margin-top:auto;border-top:1px solid var(--line);padding-top:18px;font-size:11px;line-height:1.8;color:var(--muted)}.main{padding:30px 38px 70px;min-width:0}.topbar{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:25px}.topbar span{font-size:12px;color:var(--muted)}.top-actions{display:flex;gap:10px;align-items:center}.chip{border:1px solid #3d4b67;border-radius:50px;font-size:12px;padding:7px 13px;color:#bec9df;background:#151e30;white-space:nowrap}.chip.active{background:var(--gold);color:#171c2a;border-color:var(--gold);font-weight:600}.btn{display:inline-flex;justify-content:center;align-items:center;gap:9px;min-height:44px;border:1px solid #455579;border-radius:9px;padding:11px 20px;font-size:13px;font-weight:600;transition:transform .15s,background .15s}.btn:hover{background:#34415d;transform:translateY(-1px)}.btn.primary{color:#151c29;background:linear-gradient(115deg,#edcf87,#cda85c);border-color:#f3d98f;box-shadow:0 4px 20px #d6b96118}.btn.primary:hover{background:#f2d791}.btn.ghost{border:0;color:var(--muted);padding:8px}.btn.danger{color:var(--red);border-color:#70495c}.full{width:100%}.card{background:linear-gradient(140deg,#202a40b8,#131c2eeb);border:1px solid var(--line);border-radius:14px;padding:23px}.section-head{display:flex;justify-content:space-between;align-items:center;gap:15px;margin:30px 0 16px}.section-head h2{margin:0}.text-link{color:var(--muted);font-size:12px;padding:8px}.text-link:hover{color:var(--gold)}.hero{min-height:330px;border:1px solid #40516e;border-radius:18px;overflow:hidden;position:relative;background-image:linear-gradient(90deg,#10192cf5 0,#10192c99 40%,transparent 76%),url('assets/academy.png');background-size:cover;background-position:center}.hero-copy{position:relative;padding:37px 38px;max-width:55%;z-index:1}.hero h1{font-size:38px;line-height:1.5;margin:18px 0 10px;font-weight:500;letter-spacing:3px}.hero p{color:#b9c6df;font-size:13px;line-height:1.9;margin-bottom:26px}.hero:after{content:"";position:absolute;inset:0;border-radius:18px;box-shadow:inset 0 0 60px #030b2029;pointer-events:none}.hero .pill{display:inline-flex;gap:8px;align-items:center;color:var(--gold);border:1px solid #89744e77;padding:5px 12px;font-size:10px;letter-spacing:1px;border-radius:30px;background:#17203688}.base-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:20px;margin-top:22px}.mission{border-color:#a08754;position:relative;overflow:hidden}.mission:before{content:"";position:absolute;right:-20px;top:-45px;width:160px;height:160px;border:1px solid #d2bd7020;border-radius:50%}.mission-title{display:flex;justify-content:space-between;gap:12px;align-items:center;margin:14px 0}.mission-title h2{font-size:25px;margin:0}.progress{height:6px;background:#46516f;border-radius:6px;overflow:hidden}.progress i{display:block;height:100%;background:linear-gradient(90deg,#d2af64,#f7df9e);border-radius:6px}.mission .meta{display:flex;justify-content:space-between;margin:16px 0 11px;font-size:11px;color:var(--muted)}.mission .btn{margin-top:22px}.tasks{display:flex;flex-direction:column;gap:12px}.task-card{display:flex;align-items:center;text-align:left;gap:14px;padding:16px 19px;flex:1;min-height:90px}.task-card>div{flex:1}.task-card strong{display:block;font-size:14px;margin-bottom:5px}.task-card span{font-size:12px;color:var(--muted)}.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:13px}.feature{padding:22px 16px;text-align:left;transition:all .2s}.feature:hover{border-color:#b8a6ed;transform:translateY(-3px)}.feature .icon{width:27px;height:27px;color:var(--gold);margin-bottom:17px}.feature strong{display:block;font-size:14px;margin-bottom:7px}.feature small{font-size:11px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:20px 0}.stat strong{display:block;font-size:30px;font-weight:500;color:var(--gold);margin:10px 0 6px}.stat small{font-size:11px}.filters{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0}.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.course-tile{padding:0;overflow:hidden;text-align:left}.course-cover{height:145px;background-image:linear-gradient(0deg,#11192ce8,transparent),url('assets/academy.png');background-size:cover;background-position:30% 36%;padding:18px;display:flex;align-items:flex-end}.course-cover.math{background-position:10% 15%;filter:hue-rotate(18deg)}.course-cover.english{background-position:90% 50%;filter:hue-rotate(-15deg)}.course-body{padding:20px}.course-body h3{font-size:19px}.course-body .progress{margin:17px 0 10px}.meta{font-size:12px;color:var(--muted);line-height:1.8}.course-body .btn{margin-top:17px}.map-wrap{position:relative;border:1px solid #384965;border-radius:18px;overflow:hidden;min-height:530px;background:radial-gradient(ellipse at 65% 20%,#33376866,transparent),radial-gradient(ellipse at 10% 80%,#39406077,transparent),#101a2d}.map-wrap:before{content:"";position:absolute;inset:0;background-image:radial-gradient(#d6e9ff 1px,transparent 1px);background-size:53px 61px;opacity:.3}.map-header{padding:27px 32px;position:relative}.map-header p{font-size:12px;color:var(--muted)}.star-path{position:absolute;left:12%;top:130px;width:70%;height:315px;overflow:visible;opacity:.7}.star-path path{stroke:#8bd6f2;stroke-width:1.5;fill:none;stroke-dasharray:5 8}.map-node{position:relative;display:flex;align-items:center;gap:18px;width:76%;margin:12px 0 25px 11%;min-height:85px;text-align:left}.map-node:nth-of-type(3){margin-left:30%}.map-node:nth-of-type(4){margin-left:18%}.orb{width:63px;height:63px;display:grid;place-items:center;border:1px solid #a9b8ed;border-radius:50%;background:radial-gradient(circle at 30% 30%,#7983b855,#253146);box-shadow:0 0 0 7px #7987c215,0 0 25px #8cb6e333;color:#e0ddff}.orb.current{border:2px solid var(--gold);color:var(--gold);box-shadow:0 0 0 7px #dcc88718,0 0 28px #c5a96855}.map-node strong{display:block;font-size:18px;margin-bottom:6px}.detail-hero{background-image:linear-gradient(90deg,#121c30f0,#11192c88),url('assets/academy.png');background-size:cover;background-position:50% 35%;padding:35px;border:1px solid #435373;border-radius:16px}.detail-hero h1{margin:15px 0}.detail-hero p{max-width:650px;font-size:14px;color:#c1cce1}.two-col{display:grid;grid-template-columns:1.5fr 1fr;gap:20px;margin-top:22px}.row{display:flex;align-items:center;justify-content:space-between;gap:14px;border-bottom:1px solid #33415b;padding:17px 0}.row:last-child{border-bottom:0}.row strong{font-size:14px;display:block;margin-bottom:5px}.row small{font-size:11px}.empty{text-align:center;padding:45px 23px;color:var(--muted);border:1px dashed #47516b;border-radius:14px;line-height:1.9}.empty .icon{display:block;margin:0 auto 18px;width:38px;height:38px;color:var(--gold)}.empty .btn{margin-top:18px}.list{display:flex;flex-direction:column;gap:12px}.file-card{display:flex;align-items:center;gap:18px;text-align:left;padding:20px}.file-icon{width:47px;height:57px;display:grid;place-items:center;border:1px solid #8e88c7;border-radius:8px;background:#605f9638;color:#d7c9ff;flex-shrink:0}.file-card>div:nth-child(2){flex:1}.file-card h3{margin-bottom:5px}.search{border:1px solid #455577;border-radius:10px;background:#19243a;padding:12px 15px;color:white;width:min(100%,400px);outline:none}.search:focus{border-color:var(--lav)}.reader{max-width:760px;margin:auto}.paper{background:#f0ede4;color:#263047;border-radius:8px;padding:45px;min-height:470px;font-family:"Microsoft YaHei",sans-serif;line-height:2.1;box-shadow:0 15px 50px #0004}.paper .eyebrow{color:#7d6a43}.paper h2{font-size:28px;margin-top:35px}.paper p{font-size:17px;line-height:2.2}.reader-controls{display:flex;align-items:center;justify-content:space-between;gap:15px;margin:20px 0}.tag{display:inline-block;padding:4px 8px;border-radius:5px;background:#655b9033;color:#cfbdff;font-size:10px;white-space:nowrap}.tag.green{background:#46755a44;color:var(--green)}.tag.red{background:#8f4f6544;color:var(--red)}.mistake-card{padding:22px}.mistake-card h3{font-size:18px;line-height:1.7}.mistake-card .topline{display:flex;gap:10px;align-items:center;margin-bottom:14px}.mistake-card .actions{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}.wrong-choice{border-left:2px solid var(--red);background:#b9516420;padding:10px 13px;color:var(--red);font-size:13px;margin:16px 0}.bars{height:150px;display:flex;align-items:flex-end;justify-content:space-around;gap:17px;border-bottom:1px solid #53607b;padding:10px 20px 0;margin:20px 0 35px}.bar{width:35px;background:linear-gradient(#c8baff,#615f9c);min-height:3px;border-radius:4px 4px 0 0;position:relative}.bar label{position:absolute;bottom:-27px;left:50%;transform:translateX(-50%);font-size:11px;color:var(--muted)}.badge-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;text-align:center}.badge-medal{width:73px;height:73px;display:grid;place-items:center;border:1px solid #736546;border-radius:23px;transform:rotate(15deg);margin:8px auto 20px;color:var(--gold);background:#6d5b3629;box-shadow:inset 0 0 20px #d6ae3b19}.badge-medal .icon{width:35px;height:35px;transform:rotate(-15deg)}.locked{opacity:.35}.badge-grid h3{font-size:12px}.badge-grid p{font-size:10px;color:var(--muted)}.note{font-size:12px;color:var(--muted);line-height:1.8;background:#33324c66;border:1px solid #454165;border-radius:9px;padding:12px 15px;margin:15px 0}.account-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:26px}.account{text-align:center;padding:34px 20px}.account .avatar{width:70px;height:70px;font-size:35px;margin:0 auto 22px}.account .btn{margin-top:20px}.login-art{min-height:280px;background:linear-gradient(90deg,#131c30fa,#131c3066),url('assets/academy.png') 60% 40%/cover;border-radius:18px;padding:40px}.login-art h1{font-size:40px;margin-top:30px}.login-art p{color:var(--muted);max-width:450px}.profile-hero{display:flex;align-items:center;gap:22px;margin-bottom:28px}.profile-hero .avatar{width:80px;height:80px;font-size:40px}.settings-list .row{padding:22px 0}.completion{text-align:center;max-width:690px;margin:15px auto}.completion .badge-medal{width:120px;height:120px;margin-bottom:35px;background:radial-gradient(#7d663b55,#131b2f);box-shadow:0 0 90px #c9a65c25}.completion .badge-medal .icon{width:65px;height:65px}.completion h1{font-size:37px;color:var(--gold)}.completion .actions{display:flex;gap:14px;justify-content:center;margin-top:25px}.admin-tabs{display:flex;gap:9px;flex-wrap:wrap;margin-bottom:25px}.admin-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:22px}.admin-preview{position:sticky;top:25px;align-self:start}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px}.field{display:flex;flex-direction:column;gap:8px;margin-bottom:17px;font-size:12px;color:#c8d2e5}.field input,.field select,.field textarea{width:100%;min-width:0;border:1px solid #455577;background:#111b2d;border-radius:8px;padding:11px 13px;color:var(--text);outline:none}.field input:focus,.field textarea:focus{border-color:var(--lav)}.field textarea{min-height:90px;resize:vertical}.form-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}.admin-table{width:100%;border-collapse:collapse;font-size:12px}.admin-table th,.admin-table td{text-align:left;padding:15px 12px;border-bottom:1px solid #34415d}.admin-table th{color:var(--muted);font-weight:400}.table-wrap{overflow:auto}.admin-table td:first-child{min-width:130px}.error{color:var(--red);font-size:13px;line-height:1.8}.mobile-nav{display:none}#toast{position:fixed;bottom:35px;left:50%;transform:translate(-50%,20px);opacity:0;z-index:100;background:#333d5a;border:1px solid #7c80b5;padding:13px 22px;border-radius:12px;max-width:90vw;font-size:13px;box-shadow:0 8px 30px #0005;pointer-events:none;transition:.2s}#toast.show{opacity:1;transform:translate(-50%,0)}.player-layout{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(320px,1fr);gap:20px;align-items:start}.video-column{min-width:0}.video-box{background:#070e1c;border:1px solid #40516f;border-radius:13px;overflow:hidden;aspect-ratio:16/9;position:relative;display:flex;align-items:center;justify-content:center}.video-box video{width:100%;height:100%;object-fit:contain;background:#040914;display:block}.video-box video[hidden]{display:none}.slide{position:absolute;inset:0;background:linear-gradient(105deg,#e5e8ee 0,#d5dcee 52%,#8c91b399 100%);color:#1b2541;padding:9% 8%;display:flex;flex-direction:column;justify-content:center}.slide h2{font-size:clamp(17px,2.5vw,32px);font-weight:500;max-width:75%;line-height:1.7}.slide p{color:#57647c;font-size:clamp(10px,1vw,14px);margin:0}.slide:after{content:'✧';font-size:145px;color:#898fc24d;position:absolute;right:4%;bottom:-10%}.play-overlay{position:absolute;inset:0;z-index:2;display:grid;place-items:center}.play-circle{width:57px;height:57px;display:grid;place-items:center;border-radius:50%;background:#121b37b8;color:#f5e5b9;box-shadow:0 0 0 1px #fff4}.play-overlay.playing{opacity:0}.play-overlay.playing:hover{opacity:1}.video-controls{padding:16px;border:1px solid #3a4967;border-top:0;border-radius:0 0 12px 12px;background:#111a2b}.video-controls input{width:100%;accent-color:var(--gold);cursor:pointer}.control-row{display:flex;align-items:center;justify-content:space-between;margin-top:10px;gap:9px;font-size:11px;color:var(--muted)}.control-row button{min-height:34px;padding:5px}.play-tools{display:flex;gap:8px;flex-wrap:wrap;margin-top:15px}.play-tools .btn{font-size:11px;min-height:35px;padding:7px 12px}.quiz-panel{min-width:0}.quiz-panel h2{font-size:18px;line-height:1.8;margin:16px 0}.quiz-top{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:13px}.options{display:flex;flex-direction:column;gap:10px;margin:19px 0}.option{display:flex;gap:13px;align-items:center;text-align:left;min-height:51px;padding:11px 15px;border:1px solid #48567b;border-radius:10px;color:#d8e1f3;font-size:13px;background:#1a253c}.option:hover{border-color:#a796eb}.option.selected{border:2px solid #b7a1ff;background:#53437b55;padding:10px 14px}.option-mark{width:28px;height:28px;display:grid;place-items:center;border:1px solid #7b87b1;border-radius:50%;flex-shrink:0}.selected .option-mark{background:#b6a1ef;color:#1b1c36}.option.is-correct{border-color:#7ac9a1;background:#38685133}.option.is-wrong{border-color:#cf8999;background:#75344933}.explanation{padding:15px;border-radius:10px;background:#293544;border:1px solid #5b826e;font-size:13px;line-height:1.85;margin-bottom:16px}.explanation.wrong{border-color:#915b73;background:#53304344}.explanation strong{display:block;color:var(--green);margin-bottom:8px}.explanation.wrong strong{color:var(--red)}.history-item{padding:12px;border-left:2px solid #685c9e;font-size:12px;margin:12px 0;background:#28243b55}.viewer-embed{height:70vh;width:100%;border:1px solid #53617f;border-radius:10px;background:#111a2b}.page-title{display:flex;align-items:center;gap:12px;margin-bottom:20px}.page-title h1{margin:0;font-size:27px}.back{width:40px;height:40px;border:1px solid #3a4662;border-radius:50%;display:grid;place-items:center}.player-no-question{text-align:center;padding:35px 18px}.player-no-question .icon{width:44px;height:44px;color:var(--gold);margin-bottom:20px}.player-no-question h2{font-size:19px}.player-no-question p{font-size:12px;color:var(--muted)}.zoomed{font-size:125%}.zoomed p{font-size:21px}.help-list{font-size:12px;color:var(--muted);line-height:2.1;padding-left:20px}.mini-status{margin-top:14px;font-size:11px;color:var(--muted)}.shell.immersive{display:block;max-width:none}.immersive .sidebar,.immersive .topbar{display:none}.immersive .main{padding:18px}.immersive .player-layout{max-width:1500px;margin:auto}.immersive .page-title{margin-bottom:12px}.immersive .note{display:none}.mobile-tools{display:none}.d-flex{display:flex;gap:12px;align-items:center}.spacer{flex:1}.stack{display:flex;flex-direction:column;gap:16px}.export-note{font-size:11px;color:var(--muted);line-height:1.8;margin-top:15px}
@media(min-width:1250px){.main{padding:30px 44px 70px}.hero{min-height:350px}.hero-copy{padding:42px}}
@media(max-width:1050px){.shell{grid-template-columns:190px minmax(0,1fr)}.sidebar{padding:26px 14px}.brand{font-size:18px;gap:9px}.logo{width:30px;height:30px;font-size:19px}.main{padding:25px}.feature-grid{grid-template-columns:repeat(2,1fr)}.course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero-copy{max-width:65%;padding:28px}.hero h1{font-size:31px}.player-layout{grid-template-columns:minmax(0,1fr)}.admin-layout{grid-template-columns:1fr}.admin-preview{position:static}.base-grid{grid-template-columns:1fr}.two-col{grid-template-columns:1fr}}
@media(max-width:700px){h1{font-size:27px}.demo-strip{font-size:10px;padding:7px 10px}.shell{display:block}.sidebar{display:none}.main{padding:18px 17px 105px}.topbar{margin-bottom:19px}.topbar>span{font-size:10px}.top-actions .chip{font-size:10px;padding:6px 9px}.mobile-tools{display:flex;align-items:center;gap:10px}.mobile-tools .brand{font-size:18px}.topbar .desktop-label{display:none}.hero{min-height:350px;background-position:60% center;background-image:linear-gradient(90deg,#10192cdd,transparent 90%),url('assets/academy.png')}.hero-copy{padding:25px 23px;max-width:77%}.hero h1{font-size:29px;line-height:1.6;margin-top:33px}.hero p{max-width:170px;font-size:11px}.hero .btn{font-size:12px}.hero .pill{font-size:9px}.base-grid{margin-top:16px;gap:13px}.card{padding:19px}.mission-title h2{font-size:22px}.tasks{flex-direction:row;gap:10px}.task-card{display:block;padding:15px 13px;min-width:0}.task-card>.icon{margin-bottom:10px;color:var(--gold)}.task-card strong{font-size:12px}.task-card span{font-size:10px}.tasks .task-card>span{display:none}.feature-grid{grid-template-columns:repeat(2,1fr);gap:11px}.feature{padding:18px}.feature .icon{margin-bottom:12px;width:25px}.feature strong{font-size:13px}.section-head{margin-top:25px}.section-head h2{font-size:17px}.mobile-nav{position:fixed;bottom:0;left:0;right:0;z-index:30;display:flex;justify-content:space-around;border-top:1px solid #4b5271;background:#0e1729ed;backdrop-filter:blur(18px);padding:10px 12px max(10px,env(safe-area-inset-bottom))}.mobile-nav button{display:flex;align-items:center;flex-direction:column;gap:6px;font-size:10px;color:#aab7d0;min-width:65px;min-height:44px}.mobile-nav .active{color:var(--gold)}.mobile-nav .icon{width:22px;height:22px}.stats{gap:8px}.stat{padding:14px 10px}.stat strong{font-size:25px}.stat small{font-size:10px}.course-grid{grid-template-columns:1fr}.course-tile{display:grid;grid-template-columns:105px minmax(0,1fr)}.course-cover{height:100%;min-height:160px;padding:12px}.course-body{padding:17px}.course-body h3{font-size:17px}.course-body .btn{font-size:11px;padding:7px 12px;min-height:36px}.course-body .progress{margin-top:12px}.map-wrap{min-height:520px}.map-header{padding:25px}.map-node{margin-left:8%;gap:15px}.map-node:nth-of-type(3){margin-left:19%}.map-node:nth-of-type(4){margin-left:8%}.map-node strong{font-size:16px}.orb{width:58px;height:58px}.detail-hero{padding:25px}.detail-hero h1{font-size:27px}.detail-hero p{font-size:12px}.file-card{gap:12px;padding:15px}.file-card h3{font-size:14px}.file-card .btn{font-size:11px;padding:8px 12px;min-height:38px}.file-icon{width:36px;height:48px}.file-card small{font-size:10px}.paper{padding:28px 23px;min-height:430px}.paper h2{font-size:23px}.paper p{font-size:15px}.reader-controls{gap:7px}.reader-controls .btn{font-size:11px;padding:9px 12px}.account-grid{grid-template-columns:1fr;gap:12px}.account{display:flex;align-items:center;gap:17px;padding:20px;text-align:left}.account .avatar{width:50px;height:50px;font-size:25px;margin:0}.account>div{flex:1}.account h2{font-size:16px;margin:0 0 5px}.account p{font-size:11px;margin:0}.account .btn{margin:0;font-size:11px;padding:9px 12px}.login-art{padding:25px;min-height:270px;background-position:68% 40%}.login-art h1{font-size:29px}.login-art p{font-size:12px;max-width:210px}.form-grid{grid-template-columns:1fr}.form-grid .field{margin-bottom:0}.form-grid{margin-bottom:17px}.page-title h1{font-size:22px}.profile-hero h1{font-size:25px}.badge-medal{width:60px;height:60px}.badge-grid{gap:7px}.completion .actions{flex-direction:column}.completion h1{font-size:30px}#toast{bottom:90px;width:max-content;max-width:90vw}.video-controls{padding:12px}.slide h2{font-size:21px}.slide p{font-size:10px}.player-layout{gap:16px}.quiz-panel{padding:18px}.quiz-panel h2{font-size:18px}.play-tools{gap:6px}.play-tools .btn{font-size:10px}.control-row{font-size:10px}.profile-hero .avatar{width:66px;height:66px}.shell.immersive .main{padding:12px 12px 24px}.immersive .mobile-nav{display:none}}
@media(orientation:landscape) and (max-height:600px){body:has(.player-layout) .demo-strip,body:has(.player-layout) .sidebar,body:has(.player-layout) .topbar,body:has(.player-layout) .mobile-nav{display:none}body:has(.player-layout) .shell{display:block;max-width:none}body:has(.player-layout) .main{padding:8px 12px}body:has(.player-layout) .page-title{margin:0 0 6px}body:has(.player-layout) .page-title h1{font-size:16px}body:has(.player-layout) .back{width:28px;height:28px}body:has(.player-layout) .page-title .btn{font-size:10px;min-height:28px;padding:4px 10px}.player-layout{grid-template-columns:minmax(0,1.25fr) minmax(275px,1fr);gap:12px;height:calc(100dvh - 48px);align-items:stretch}.video-column{overflow:auto;scrollbar-width:thin}.video-box{max-height:calc(100dvh - 135px)}.video-controls{padding:7px 12px}.control-row{margin-top:2px}.play-tools{margin-top:6px}.play-tools .btn{padding:5px 8px;min-height:28px;font-size:10px}.quiz-panel{padding:12px;overflow:auto;max-height:100%;scrollbar-width:thin}.quiz-top{font-size:11px}.quiz-panel h2{font-size:15px;margin:9px 0;line-height:1.6}.options{gap:6px;margin:10px 0}.option{min-height:38px;font-size:12px;padding:7px 10px;gap:9px}.option.selected{padding:6px 9px}.option-mark{width:23px;height:23px}.quiz-panel .btn{min-height:37px;padding:7px 13px}.quiz-panel .note{font-size:10px;padding:7px;margin:8px 0}.video-column>.note,.video-column>.mini-status{display:none}.explanation{font-size:12px;padding:10px}.player-layout.solo{grid-template-columns:1fr}.solo .video-box{max-height:calc(100dvh - 125px)}.solo .quiz-panel{display:none}.solo .play-tools{justify-content:center}.slide h2{font-size:clamp(16px,3vw,28px)}.slide p{font-size:11px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

.slide[hidden]{display:none}
@media(max-width:700px){.top-actions .chip:nth-child(2){display:none}.top-actions .chip{max-width:155px;overflow:hidden;text-overflow:ellipsis}.topbar{gap:8px}.topbar .brand{font-size:16px}.main{min-width:0}}

/* Connected learning experience */
.note.duration-warning,.player-progress p.duration-warning,small.duration-warning{color:#e6c67a}
a{text-decoration:none}a.btn{cursor:pointer}a:hover{color:var(--gold)}a.btn.primary:hover{color:#151c29}.brand{color:var(--text)}.shell{min-height:100vh}.initial-loading{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;text-align:center;color:var(--muted)}.initial-loading .logo{width:65px;height:65px;font-size:45px;margin-bottom:14px}.initial-loading h1{color:var(--text);letter-spacing:5px}.auth-wrap{max-width:1120px;min-height:100vh;margin:auto;padding:60px 35px 30px;display:grid;grid-template-columns:1.3fr 1fr;align-content:center;gap:28px}.auth-wrap .login-art{min-height:600px;display:flex;flex-direction:column;justify-content:center;padding:45px;background-position:65% center;border:1px solid #43516a;box-shadow:0 20px 90px #0003}.auth-wrap .login-art .brand{margin-bottom:auto}.auth-wrap .login-art .eyebrow{margin-top:50px}.auth-wrap .login-art h1{line-height:1.7;letter-spacing:5px;font-size:42px}.auth-wrap .login-art p{margin-top:10px;line-height:2}.auth-wrap .auth-form{padding:35px 30px;align-self:center;border-color:#5a5779;box-shadow:0 20px 70px #0003}.auth-form>h2{font-size:25px;margin:16px 0 28px}.auth-wrap footer{grid-column:1/-1;text-align:center;font-size:11px;color:var(--muted);letter-spacing:2px;padding:20px}.auth-wrap>.empty{grid-column:1/-1}.auth-wrap .error:empty{display:none}.field input:focus-visible,.field select:focus-visible,.field textarea:focus-visible{outline:1px solid var(--lav)}.wrap{flex-wrap:wrap}.profile-form{max-width:700px;margin-bottom:24px}.catalog-toolbar{display:flex;flex-wrap:wrap;gap:13px;margin:25px 0}.filter-field{display:flex;flex-direction:column;gap:8px;color:var(--muted);font-size:11px;flex:1;min-width:120px;max-width:220px}.filter-field select,.filter-field input{width:100%;border:1px solid #455577;background:#19243a;border-radius:9px;color:var(--text);min-height:44px;padding:10px 13px;outline:none}.filter-field select:focus,.filter-field input:focus{border-color:var(--lav)}.filter-field.search-field{max-width:none;min-width:220px;flex:2}.view-switch{display:flex;gap:7px}.view-switch .btn{font-size:12px;min-height:36px;padding:7px 12px}.real-map{min-height:0}.constellation-list{position:relative;padding:0 28px 28px}.constellation-list:before{content:"";position:absolute;width:1px;left:59px;top:20px;bottom:70px;background:linear-gradient(var(--gold),#a49bdf55);opacity:.7}.real-map .map-node{width:auto;margin:0 0 14px;padding:18px;gap:23px;isolation:isolate;border:1px solid transparent;border-radius:14px;color:var(--text);transition:.2s}.real-map .map-node:hover{border-color:#786d9d;background:#332e4c88}.real-map .map-node .orb{background:radial-gradient(circle at 30% 30%,#59618e,#182942);flex-shrink:0;width:62px;height:62px}.real-map .map-node>span:nth-child(2){flex:1;min-width:0}.real-map .map-node strong{font-size:17px;line-height:1.6;overflow-wrap:anywhere}.real-map .map-node small{display:block;font-size:11px;margin-top:5px}.map-progress{display:block;color:#ccbbf2;font-size:10px;margin-top:9px}.map-node>.icon{color:var(--muted);width:18px}.real-map .map-node:nth-child(3n+2){margin-left:7%}.real-map .map-node:nth-child(3n){margin-left:14%}.material-mini{display:flex;align-items:center;gap:14px;padding:15px 0;border-bottom:1px solid #33415b;color:var(--text)}.material-mini:last-of-type{border-bottom:0}.material-mini>span{flex:1;min-width:0}.material-mini strong{font-size:13px;line-height:1.8;display:block;overflow-wrap:anywhere}.material-mini small{font-size:10px}.material-mini>.icon{color:var(--lav)}.reader-meta{display:flex;justify-content:space-between;align-items:center;gap:14px;color:var(--muted);font-size:12px;margin-bottom:18px}.reader-bookmark{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:12px}.reader-bookmark input{width:85px;border:1px solid #5d6480;background:#152138;border-radius:8px;padding:10px;color:var(--text)}.image-viewer{overflow:auto;background:#0a1120;border:1px solid #465371;border-radius:12px;max-height:80vh;padding:15px;display:block;overscroll-behavior:contain}.image-viewer img{display:block;height:auto;max-width:none;min-width:100px;margin:auto;border-radius:4px}.player-status-row{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;margin:12px 2px 0;font-size:11px;color:var(--muted);line-height:1.8}.player-status-row #sync-status{max-width:65%;text-align:right}.video-box video{color-scheme:dark;outline:none}.player-progress{padding:20px}.player-progress>.d-flex{margin-bottom:15px;font-size:13px}.player-progress p{font-size:11px;margin:13px 0 0}.player-layout .video-box{border-radius:12px}.quiz-panel{border-color:#605977;box-shadow:0 12px 35px #0002}.quiz-panel h2,.preserve-lines,.question-text{white-space:pre-wrap;overflow-wrap:anywhere}.question-text{line-height:1.9;margin-top:18px}.quiz-panel .option>span:last-child{white-space:pre-wrap;overflow-wrap:anywhere;min-width:0}.quiet-stars{font-size:32px;letter-spacing:18px;color:#beb0e5;margin:35px 0}.history-details{border-top:1px solid #3f4863;padding:18px 0 0;margin-top:20px;font-size:12px}.history-details summary{cursor:pointer;color:#cfbee8;line-height:1.8}.history-details[open] summary{margin-bottom:15px}.retry-wrap{max-width:760px;margin:28px auto}.retry-wrap>section{padding:30px}.retry-wrap h2{line-height:1.9;font-size:21px;white-space:pre-wrap;overflow-wrap:anywhere}.points-hero{background:radial-gradient(ellipse at 80% 30%,#65538555,transparent 70%),linear-gradient(120deg,#202a40,#131c2e);padding:40px;border-color:#6b607a}.points-hero h1{color:var(--gold);font-size:55px;margin:30px 0 12px;font-weight:500}.points-hero h1 small{font-size:15px;letter-spacing:1px}.learner-overview{display:grid;grid-template-columns:1fr 1fr;gap:22px}.learner-overview>.card{min-width:0}.material-checks{border:1px solid #485475;border-radius:10px;padding:15px;margin:20px 0;max-height:430px;overflow:auto;scrollbar-width:thin}.material-checks legend{color:var(--muted);font-size:12px;padding:0 8px}.material-checks label{display:flex;gap:12px;align-items:start;font-size:12px;padding:12px 7px;border-bottom:1px solid #34425e;cursor:pointer;line-height:1.8}.material-checks input{accent-color:var(--lav);width:18px;height:18px;flex-shrink:0}.material-checks small{display:block;font-size:10px}.material-checks label:last-child{border:0}.table-actions{display:flex;gap:8px}.table-actions .btn{font-size:11px;padding:8px 12px;min-height:34px}.admin-table td{line-height:1.9}.admin-table td:first-child{min-width:210px}.admin-preview .option{font-size:12px;padding:10px}.admin-preview h2{font-size:17px;line-height:1.9}.admin-preview .note{font-size:11px}.admin-preview .btn{font-size:12px}.admin-preview #editor-preview{margin-bottom:18px}.option[disabled]{opacity:1}.mobile-nav a{display:flex;align-items:center;flex-direction:column;gap:6px;font-size:10px;color:#aab7d0;min-width:50px;min-height:44px}.mobile-nav a.active{color:var(--gold)}.mobile-nav a:hover{color:var(--gold)}.top-actions a.chip{color:var(--gold)}.viewer-embed{min-height:480px}.error:empty{display:none}
@media(min-width:1600px){.shell{max-width:1650px}.player-layout{grid-template-columns:minmax(0,1.6fr) minmax(350px,1fr)}}
@media(max-width:1050px){.auth-wrap{grid-template-columns:1.1fr 1fr;padding:35px 25px}.auth-wrap .login-art{padding:30px}.auth-wrap .login-art h1{font-size:35px}.player-status-row #sync-status{max-width:70%}}
@media(max-width:700px){.auth-wrap{padding:20px 17px;display:block;min-height:100dvh}.auth-wrap .login-art{min-height:310px;padding:25px;background-position:65% 42%;margin-bottom:18px;justify-content:flex-start}.auth-wrap .login-art .brand{margin-bottom:12px}.auth-wrap .login-art .eyebrow{margin-top:16px;font-size:8px}.auth-wrap .login-art h1{font-size:29px;margin:14px 0 0;letter-spacing:2px;line-height:1.5}.auth-wrap .login-art p{font-size:11px;max-width:210px;margin-bottom:0;line-height:1.9}.auth-wrap .auth-form{padding:26px 23px}.auth-wrap footer{padding:26px 0 12px;font-size:10px;letter-spacing:1px}.filter-field{min-width:90px;max-width:none;flex-basis:25%}.filter-field.search-field{flex-basis:100%;min-width:0}.catalog-toolbar{gap:10px;margin:20px 0}.filter-field select{padding:10px 8px;font-size:12px}.section-head .view-switch{gap:5px}.view-switch .btn{padding:7px 10px;font-size:11px}.course-body h3{line-height:1.7;overflow-wrap:anywhere}.constellation-list{padding:0 12px 16px}.constellation-list:before{left:42px}.real-map .map-node{padding:14px 4px;gap:16px;margin-bottom:10px}.real-map .map-node:nth-child(3n+2){margin-left:3%}.real-map .map-node:nth-child(3n){margin-left:6%}.real-map .map-node .orb{width:53px;height:53px}.real-map .map-node strong{font-size:14px}.real-map .map-node small{font-size:10px}.map-progress{font-size:10px}.real-map .map-header h2{font-size:19px;margin-top:15px}.map-header .eyebrow{font-size:9px;letter-spacing:1px}.real-map .map-node>.icon{width:16px}.learner-overview{grid-template-columns:1fr;gap:18px}.reader-meta{align-items:start;line-height:1.8}.reader-meta .btn{font-size:11px;padding:9px 12px;flex-shrink:0}.reader-controls{flex-wrap:wrap;align-items:center}.reader-controls .meta{font-size:10px}.reader-bookmark{gap:8px;font-size:11px}.reader-bookmark input{width:65px;padding:9px}.reader-bookmark .btn{font-size:11px;padding:9px 10px}.viewer-embed{height:70dvh;min-height:420px}.image-viewer{padding:8px}.image-viewer img{margin:0}.points-hero{padding:27px}.points-hero h1{font-size:43px}.points-hero h1 small{font-size:12px}.retry-wrap>section{padding:22px}.retry-wrap h2{font-size:19px}.player-status-row{font-size:10px;gap:8px}.player-status-row #sync-status{max-width:65%}.player-progress{padding:16px}.file-card{flex-wrap:wrap}.file-card>div:nth-child(2){min-width:150px}.file-card h3{overflow-wrap:anywhere;line-height:1.7}.row>div:first-child{min-width:0}.row strong{overflow-wrap:anywhere}.page-title h1{overflow-wrap:anywhere}.admin-tabs .btn{font-size:11px;padding:9px 12px}.material-checks{max-height:330px}.topbar{min-height:34px}.profile-form{margin-bottom:18px}.sidebar-foot .btn{margin-top:10px}.quiz-panel{scroll-margin-top:15px}}
@media(orientation:landscape) and (max-height:600px){.player-layout{height:calc(100dvh - 50px);grid-template-columns:minmax(0,1.3fr) minmax(270px,1fr)}.player-status-row{font-size:9px;margin:5px 1px}.video-box{max-height:calc(100dvh - 125px)}.video-column>.player-progress,.video-column>.section-head,.video-column>#question-timeline{display:none}.video-column .play-tools{margin-top:4px}.player-layout .quiz-panel{height:100%;max-height:100%;overflow:auto}.player-layout .video-column{height:100%}.player-layout .quiet-stars{margin:15px 0}.page-title h1{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.player-layout .option[disabled]{opacity:1}.player-status-row #sync-status{max-width:65%}.auth-wrap .login-art{min-height:420px}.viewer-embed{min-height:260px}}

/* Second-round learning controls retain the video and quiz DOM. */
[hidden]{display:none!important}.play-tools{display:flex;flex-wrap:wrap;gap:9px;align-items:center}.play-tools select{min-height:44px;padding:8px;background:var(--panel2);color:var(--text);border:1px solid var(--line);border-radius:8px}.play-tools [aria-pressed=true]{background:var(--gold);color:var(--bg)}.private-notes{margin:18px 0}.private-notes textarea{width:100%;min-height:130px;background:var(--bg);color:var(--text);border:1px solid var(--line);border-radius:9px;padding:14px;line-height:1.7}.course-directory{margin-top:14px;padding:14px}.course-directory summary{cursor:pointer}.practice-unit{padding:20px 0;border-bottom:1px solid var(--line)}.practice-unit .options{display:flex;flex-direction:column;align-items:stretch}.practice-unit .options .btn{justify-content:flex-start;white-space:normal;text-align:left}.pdf-scroll{height:72dvh;overflow:auto;background:#404654;padding:12px;-webkit-overflow-scrolling:touch}.pdf-scroll canvas{display:block;background:white;margin:0 auto;max-width:none}.reader-controls{position:relative;display:flex;flex-wrap:wrap;gap:8px}.reader-bookmark{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.reader-bookmark input{width:80px}#admin-reward-rules{margin-bottom:20px}#cash-rules-form{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:16px}
.player-layout:fullscreen{padding:16px;background:var(--bg);overflow:auto;width:100%;height:100%}
@media(max-width:560px){.side-nav{gap:2px}.nav-item{padding:9px 14px}}

/* Keep the challenge beside the video in wide views, and immediately below it on phones. */
.player-layout{grid-template-columns:minmax(0,1fr);grid-template-areas:"video" "quiz" "details";height:auto;align-items:start;gap:12px}
.player-layout .video-column{grid-area:video;min-width:0;height:auto;overflow:visible}
.player-layout .video-box{aspect-ratio:16/9;max-height:none}
.player-layout .quiz-panel{grid-area:quiz;position:static;height:auto;max-height:none;overflow:visible;margin:0}
.player-layout .player-details{grid-area:details;min-width:0}
#fullscreen-hint:empty{display:none}
.player-layout .player-no-question{text-align:left;padding:0}
.player-layout .player-no-question h2{margin:0 0 8px;font-size:17px}
.player-layout .player-no-question p{margin:0 0 8px;font-size:12px;line-height:1.7}
.player-layout .player-no-question small{color:var(--muted)}
.quiz-panel .compact-instruction{font-size:12px;color:var(--muted);margin:10px 0 14px;line-height:1.6}
.quiz-panel .compact-options{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:0 0 14px}
.quiz-panel .compact-options:has(>:last-child:nth-child(2)){grid-template-columns:repeat(2,minmax(0,1fr))}
.quiz-panel .compact-choice{display:flex;align-items:center;justify-content:center;padding:10px 4px;min-height:52px;font-size:23px;font-weight:600;text-align:center}
.quiz-panel .compact-options:has(>:last-child:nth-child(2)) .compact-choice{font-size:17px}
.compact-explanation{margin-top:10px;font-size:12px}
.compact-explanation summary{cursor:pointer;min-height:32px;line-height:32px}
@media(min-width:1001px){
  .player-layout{grid-template-columns:minmax(0,1.35fr) minmax(320px,1fr);grid-template-areas:"video quiz" "details quiz";column-gap:20px}
  .player-layout .quiz-panel{max-height:80dvh;overflow:auto}
}
@media(orientation:landscape) and (max-height:600px) and (min-width:601px){
  .player-layout{grid-template-columns:minmax(0,1.3fr) minmax(270px,1fr);grid-template-areas:"video quiz" "details quiz";height:auto;gap:10px}
  .player-layout .quiz-panel{max-height:calc(100dvh - 70px);overflow:auto}
  .player-details .play-tools{margin-top:4px}
}