@font-face{font-family:Noto Sans;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/noto-sans-latin-400-normal-BTkUljjl.woff2) format("woff2"),url(/assets/noto-sans-latin-400-normal-DPpKfCgK.woff) format("woff")}@font-face{font-family:Noto Sans;font-style:normal;font-display:swap;font-weight:700;src:url(/assets/noto-sans-latin-700-normal-CrvTEWhy.woff2) format("woff2"),url(/assets/noto-sans-latin-700-normal-ZyrKABVF.woff) format("woff")}:root{--orange: #d94100;--ink: #18232c;--paper: #fbfaf7;--blue: #2c6ab3;--green: #3c9c68;--purple: #7659b2;--teal: #247b78;--red: #b64942;--white: #fff;--cream: #fff8e8;--line: #e4dccb;--muted: #607080;--blue-soft: #eaf2fb;--orange-soft: #fbe8df;--green-soft: #edf6ef;--purple-soft: #f1ecf7;--red-soft: #faeeee;--space-1: 8px;--space-2: 16px;--space-3: 24px;--radius: 14px;--font: "Noto Sans", sans-serif}*{box-sizing:border-box}.exam-toolbar{position:sticky;top:72px;z-index:8;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:16px;display:flex;justify-content:space-between;gap:16px;align-items:center}.timer{font-variant-numeric:tabular-nums;font-size:26px;white-space:nowrap}.answer-options{border:0;padding:0;margin:16px 0 0;display:grid;gap:8px;min-width:0}.choice{display:flex;gap:12px;align-items:flex-start;padding:12px;border:1px solid var(--line);border-radius:10px;cursor:pointer}.choice input{accent-color:var(--orange);margin-top:5px;flex-shrink:0}.choice:has(input:checked){border-color:var(--blue);background:var(--blue-soft)}.qr-image{display:block;max-width:100%;height:auto;margin:16px auto}.scan-page{max-width:560px;margin:0 auto;padding:24px 16px;display:grid;gap:20px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:700px){.exam-toolbar{top:64px;align-items:flex-start}.exam-toolbar h1{font-size:18px}.exam-toolbar small{font-size:10px}.timer{font-size:22px}}body{margin:0;color:var(--ink);background:var(--paper);font:14px/1.6 var(--font)}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}button:disabled{opacity:.6;cursor:wait}:focus-visible{outline:3px solid var(--blue);outline-offset:3px}h1,h2,h3,p{margin:0}h1{font-size:24px;line-height:1.35;letter-spacing:-.55px}h2{font-size:17px;line-height:1.5}h3{font-size:15px}p+p{margin-top:8px}small{display:block;font-size:12px;color:var(--muted)}.muted{color:var(--muted)}.eyebrow{text-transform:uppercase;letter-spacing:.08em;font-size:11px;font-weight:700;color:var(--orange)}.grow{flex:1;min-width:0}.stack{display:grid;gap:16px}.section{margin-top:24px}.section>h2{margin-bottom:12px}.row{display:flex;gap:12px;align-items:center}.between{justify-content:space-between}.wrap{flex-wrap:wrap}.pre-line{white-space:pre-wrap;overflow-wrap:anywhere}.button{display:inline-flex;justify-content:center;align-items:center;gap:8px;min-height:44px;border:1px solid transparent;border-radius:10px;padding:10px 16px;font-weight:700;font-size:13px;line-height:1.4;text-decoration:none;flex-shrink:0}.button:hover{text-decoration:none;filter:brightness(.96)}.primary{background:var(--orange);color:#fff}.secondary{background:#fff;color:var(--ink);border-color:var(--line)}.ghost{background:transparent;color:var(--muted)}.blue-button{background:var(--blue);color:#fff}.success{background:var(--green);color:var(--ink)}.card{border:1px solid var(--line);border-radius:var(--radius);padding:16px;background:#fff;min-width:0}.tint-blue{background:var(--blue-soft);border-color:var(--blue)}.tint-cream{background:var(--cream)}.tint-green{background:var(--green-soft)}.badge{display:inline-flex;align-items:center;width:fit-content;border-radius:99px;padding:4px 9px;font-size:10px;font-weight:700;letter-spacing:.025em;text-transform:uppercase;white-space:nowrap}.badge.blue{background:var(--blue-soft);color:var(--blue)}.badge.orange{background:var(--orange-soft);color:var(--orange)}.badge.green{background:var(--green-soft);color:var(--teal)}.badge.purple{background:var(--purple-soft);color:var(--purple)}.badge.red{background:var(--red-soft);color:var(--red)}.orange-text{color:var(--orange)}.blue-text{color:var(--blue)}.green-text{color:var(--teal)}.red-text{color:var(--red)}.metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:12px}.metric{display:block;font-size:23px;margin-bottom:4px}.page-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px}.page-heading p{margin-top:6px;font-size:13px}.field{display:grid;gap:6px;min-width:0;font-size:13px;font-weight:700}.field small{font-weight:400}.field input,.field select,.field textarea,.search{width:100%;min-height:44px;border:1px solid var(--line);border-radius:9px;background:#fff;color:var(--ink);padding:10px 12px;font-size:14px;font-weight:400}.field textarea{resize:vertical;min-height:110px}.field input[type=file]{background:var(--cream);padding:16px;font-size:12px}.form{display:grid;gap:16px}.form-actions{display:flex;gap:8px;justify-content:flex-end;flex-wrap:wrap;margin-top:8px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.error{color:var(--red);background:var(--red-soft);padding:12px;border-radius:8px}.empty{text-align:center;padding:32px 16px;border:1px dashed var(--line);border-radius:var(--radius)}.empty-mark{font-size:26px;color:var(--teal)}.empty p{margin-top:8px}.empty h3{margin-top:4px}dialog{border:1px solid var(--line);border-radius:16px;max-width:680px;width:calc(100% - 32px);max-height:90dvh;padding:24px;color:var(--ink);background:var(--paper)}dialog::backdrop{background:#18232c73}.modal-head{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px}.modal-head h2{overflow-wrap:anywhere}.file-list{display:grid;gap:8px}.file-row{display:flex;align-items:center;gap:12px;border:1px solid var(--line);padding:12px;border-radius:10px}.file-row strong{font-size:12px;overflow-wrap:anywhere}.file-icon{font-size:10px;color:var(--blue);font-weight:700;background:var(--blue-soft);padding:12px 8px;border-radius:8px}.image-preview{display:block;max-width:100%;max-height:65vh;margin:auto auto 16px;object-fit:contain}.pdf-preview{width:100%;height:62vh;border:0;margin-bottom:16px}.brand{display:flex;align-items:center;gap:10px;color:inherit}.brand img{width:38px;height:38px;border-radius:10px}.brand strong{font-size:15px;letter-spacing:-.3px}.brand small{font-size:10px;letter-spacing:.12em;text-transform:uppercase}.topbar{height:72px;border-bottom:1px solid var(--line);padding:0 32px;display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--paper);position:sticky;top:0;z-index:10}.top-actions{display:flex;align-items:center;gap:12px}.avatar{display:inline-flex;align-items:center;justify-content:center;min-width:36px;height:36px;border-radius:50%;background:var(--cream);color:var(--ink);font-size:12px;font-weight:700}.demo-strip{padding:7px 16px;background:var(--cream);text-align:center;color:var(--muted);font-size:11px;border-bottom:1px solid var(--line)}.demo-strip strong{color:var(--ink)}.layout{display:grid;grid-template-columns:208px minmax(0,1fr);min-height:calc(100dvh - 105px)}.sidebar{border-right:1px solid var(--line);padding:24px 16px;background:var(--cream);display:flex;flex-direction:column;gap:4px}.cloud-shell button.nav-item{border:0;background:transparent;text-align:left;cursor:pointer}.sidebar .nav-item{display:flex;gap:12px;align-items:center;padding:12px 14px;min-height:46px;color:var(--muted);font-size:13px;border-radius:10px}.sidebar .nav-item:hover{text-decoration:none;background:#fff9}.sidebar .nav-item.active{background:var(--orange-soft);color:var(--orange);font-weight:700}.sidebar-label{font-size:10px;letter-spacing:.12em;color:var(--muted);padding:0 14px 16px;font-weight:700}.sidebar-foot{margin-top:auto;padding:32px 14px 8px}.main{padding:32px;max-width:1240px;width:100%;margin:0 auto;min-width:0}.student .main{max-width:1040px}.teacher .topbar{background:var(--ink);color:#fff;border-bottom:0}.teacher .topbar .ghost{color:#fff}.teacher .main{background:#fff;max-width:none;min-height:calc(100dvh - 105px)}.teacher{background:#fff}.student-columns{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(240px,1fr);gap:24px;align-items:start}.next-action h2{margin:10px 0 6px}.next-action .eyebrow{color:var(--blue)}.next-action .button{margin-top:16px}.quick-actions{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.quick-actions button{background:var(--cream);border:1px solid var(--line);border-radius:12px;padding:14px 4px;min-height:74px;color:var(--ink);display:grid;justify-items:center;gap:8px;font-size:11px}.quick-actions svg{color:var(--orange)}.list{display:grid;gap:12px}.task{position:relative;text-align:left;display:block;padding:16px 16px 16px 20px;width:100%;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:12px}.task:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;border-radius:12px;background:var(--orange)}.task.blue:before{background:var(--blue)}.task.green:before{background:var(--green)}.task.red:before{background:var(--red)}.task h3{margin:6px 0}.task:hover{border-color:var(--blue);text-decoration:none}.task .task-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px}.tabs{display:flex;gap:8px;margin-bottom:20px;flex-wrap:wrap}.tabs button{border:1px solid var(--line);color:var(--muted);background:#fff;border-radius:30px;padding:10px 16px;min-height:44px;font-size:12px;font-weight:700}.tabs button.selected{color:var(--orange);background:var(--orange-soft);border-color:transparent}.row-link{display:flex;align-items:center;gap:12px;width:100%;text-align:left;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;color:var(--ink)}.row-link strong{display:block;font-size:13px}.row-link .arrow{margin-left:auto;color:var(--muted)}.row-link:hover{border-color:var(--blue);text-decoration:none}.dot{width:7px;height:7px;background:var(--blue);border-radius:50%;flex-shrink:0}.split{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(280px,1fr);gap:24px;align-items:start}.detail-title{margin:12px 0}.detail-title h1{margin-bottom:8px}.back{margin-bottom:16px}.note{padding:16px;border-radius:12px;background:var(--cream)}.note h3{margin-bottom:8px}.divider{border:0;border-top:1px solid var(--line);margin:24px 0}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px}table{border-collapse:collapse;width:100%;font-size:13px}th{text-align:left;color:var(--muted);font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.035em;background:var(--paper)}th,td{padding:13px 16px;border-bottom:1px solid var(--line)}tr:last-child td{border-bottom:0}td strong{display:block}td .button{min-height:36px;padding:8px 12px;font-size:11px}.toolbar{display:flex;align-items:center;gap:12px;justify-content:space-between;margin-bottom:16px}.toolbar .search{max-width:360px}.login{min-height:100dvh;padding:32px 16px;display:grid;place-items:center}.login-panel{width:100%;max-width:440px}.login-brand{justify-content:center;margin-bottom:40px}.login-brand img{width:64px;height:64px}.login-panel h1{margin-bottom:8px}.login-panel>.muted{margin-bottom:24px}.login-panel .card{padding:24px}.login-panel .form-actions .button{width:100%}.login-note{margin-top:24px;font-size:12px;color:var(--muted);text-align:center}.login-switch{display:flex;gap:8px;margin:24px 0}.login-switch button{flex:1}.toast{position:fixed;right:24px;bottom:24px;padding:14px 20px;max-width:calc(100% - 32px);background:var(--ink);color:#fff;border-radius:12px;z-index:50;box-shadow:0 6px 24px #18232c22;font-size:13px}.review-history{padding:16px 0;border-bottom:1px solid var(--line)}.review-history:last-child{border:0}.progress{width:100%;height:8px;appearance:none;display:block;margin-top:12px}.progress::-webkit-progress-bar{background:var(--line);border-radius:6px}.progress::-webkit-progress-value{background:var(--blue);border-radius:6px}.progress::-moz-progress-bar{background:var(--blue);border-radius:6px}.reading{font-size:15px;line-height:1.9}.mobile-nav{display:none}.check{display:flex;gap:10px;align-items:flex-start;font-size:13px}.check input{width:18px;height:18px;accent-color:var(--orange)}.skip{position:absolute;top:-100px;left:16px;z-index:100;background:#fff;padding:12px}.skip:focus{top:8px}.confirm{color:var(--teal);background:var(--green-soft);padding:16px;border-radius:12px}.initial-loading{padding:48px;max-width:600px;margin:auto}.teacher-nav-mobile{display:none}.inline-preview{margin-top:16px;padding:16px;background:var(--paper);border:1px solid var(--line);border-radius:12px}.inline-preview img{display:block;max-width:100%;max-height:520px;margin:auto;object-fit:contain}.inline-preview object{width:100%;height:520px;border:0}.chapter-icon{width:36px;height:36px;display:grid;place-items:center;border-radius:10px;background:var(--blue-soft);color:var(--blue);font-weight:700}.profile-avatar{width:64px;height:64px;font-size:22px}.danger-link{color:var(--red)}@media(min-width:1500px){.teacher .main{padding:40px 48px}}@media(max-width:1050px){.student-columns{grid-template-columns:1fr}.layout{grid-template-columns:180px minmax(0,1fr)}.main{padding:24px}.split{grid-template-columns:1fr}.student-aside{display:grid;grid-template-columns:1fr 1fr;gap:16px}.student-aside .section{margin-top:0}}@media(max-width:700px){h1{font-size:22px}.topbar{height:64px;padding:0 16px}.top-actions{gap:4px}.top-actions .button{padding:8px 10px}.topbar .brand small{display:none}.demo-strip{font-size:10px}.layout{display:block;min-height:calc(100dvh - 97px)}.sidebar{display:none}.main,.teacher .main{padding:24px 16px 104px}.student-aside{display:block}.student-aside .section{margin-top:24px}.mobile-nav{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--line);padding:8px 8px max(8px,env(safe-area-inset-bottom));z-index:20}.mobile-nav a,.mobile-nav .nav-item{display:grid;justify-items:center;gap:3px;font-size:10px;color:var(--muted);padding:5px;border-radius:12px;min-height:48px}.mobile-nav a.active,.mobile-nav .nav-item.active{color:var(--orange);background:var(--orange-soft);font-weight:700}.teacher-nav-mobile{display:flex;overflow-x:auto;gap:8px;padding:10px 16px;border-bottom:1px solid var(--line);background:var(--cream)}.teacher-nav-mobile a,.teacher-nav-mobile .nav-item{white-space:nowrap;padding:10px;font-size:12px;color:var(--muted)}.teacher-nav-mobile a.active,.teacher-nav-mobile .nav-item.active{color:var(--orange);background:var(--orange-soft);border-radius:8px;font-weight:700}.page-heading{align-items:flex-start;flex-wrap:wrap}.page-heading .button{margin-left:auto}.metrics{gap:8px}.metrics .card{padding:12px}.metric{font-size:20px}.form-grid{grid-template-columns:1fr}.toast{bottom:88px;right:16px}.file-row{gap:8px;padding:10px}.file-row .button{padding:8px}.file-icon{display:none}.toolbar{flex-wrap:wrap}.toolbar .search{max-width:none}.login-brand{margin-bottom:24px}.top-actions .avatar{display:none}dialog{padding:16px}.row.wrap .button{flex-shrink:1}.table-wrap table{min-width:530px}.teacher .metrics{grid-template-columns:repeat(2,1fr)}.tabs{gap:6px}.tabs button{padding:10px 12px}}@media(prefers-reduced-motion:no-preference){.button,.task,.row-link{transition:background .15s,border-color .15s}}@media(max-width:360px){.topbar .brand{gap:8px}.topbar .brand strong{font-size:14px}.top-actions{gap:0}.top-actions .button{padding:8px 6px}.console-label{font-size:11px}}