@import"https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Noto+Serif+SC:wght@500;600;700&family=Source+Han+Sans+SC:wght@400;500;600&display=swap";:root{color:#e8edf5;background:#0b1220;font-family:Source Han Sans SC,Inter,sans-serif;font-synthesis:none}*{box-sizing:border-box}body{margin:0;min-width:1100px;background:radial-gradient(circle at 12% -10%,#25446d 0%,transparent 34%),#0b1220}button,input{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}.app-shell{min-height:100vh;padding:0 28px 28px}.topbar{height:84px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #243149}.brand{display:flex;gap:12px;align-items:center}.brand strong{display:block;font-family:"Noto Serif SC",serif;font-size:20px}.brand span{color:#8e9db3;font:10px DM Mono,monospace;letter-spacing:.12em}.brand-mark{width:38px;height:38px;display:grid;place-items:center;border:1px solid #d8a849;color:#f4cf78;font-family:"Noto Serif SC",serif;font-size:21px}.topbar nav{display:flex;align-items:center;gap:14px}.quiet-button,.link-button{background:transparent;color:#b4c6dc;border:0;padding:8px}.avatar{border:1px solid #40516b;background:#172439;color:#e9c36d;border-radius:50%;width:32px;height:32px}.notice{margin:16px 0 0;padding:10px 14px;border:1px solid #536783;color:#ccdae9;background:#142238;display:flex;justify-content:space-between}.notice button{border:0;background:transparent;color:#e6eef9}.workbench{display:grid;grid-template-columns:272px minmax(600px,1fr);gap:22px;padding-top:24px}.workbench.with-agent{grid-template-columns:272px minmax(520px,1fr) 314px}.library-panel,.tutor-panel,.pdf-stage-card,.question-desk{border:1px solid #25334a;background:linear-gradient(145deg,#162236fa,#0d1625fa)}.library-panel{padding:20px;min-height:740px}.main-panel{min-width:0}.main-heading{display:flex;justify-content:space-between;align-items:end;padding:2px 0 14px}.main-heading h1{margin:4px 0 0;font-family:"Noto Serif SC",serif;font-size:25px}.eyebrow{color:#e3b75b;font:10px DM Mono,monospace;letter-spacing:.13em;text-transform:uppercase}.section-title h2{margin:0;font:600 17px "Noto Serif SC",serif}.section-title p{margin:4px 0 16px;color:#8292a9;font-size:12px}.agent-toggle{color:#b9c9dc;background:#17243a;border:1px solid #34455f;padding:8px 10px}.upload-box{border:1px dashed #49617e;padding:12px;background:#040a1338}.segmented{display:flex;margin-bottom:10px}.segmented button{width:50%;padding:6px;color:#99a8bb;background:transparent;border:1px solid #2f4059}.segmented .active{color:#f0ca72;background:#273550}.upload-box label{display:block;padding:12px 4px;font-size:12px;color:#bbcadc}.upload-box input{max-width:100%;color:#8093ac;font-size:11px}.small-primary,.primary-button{border:0;background:#d7a848;color:#172033;font-weight:700;padding:9px 14px}.small-primary{width:100%;font-size:12px}.document-list{margin-top:18px;display:grid;gap:6px}.document-item{display:flex;width:100%;gap:9px;text-align:left;align-items:center;padding:9px 5px;background:transparent;border:1px solid transparent;color:#d6e0ed}.document-item.selected{background:#1b2a42;border-color:#3b4f6c}.document-item strong,.document-item small{display:block;max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.document-item strong{font-size:12px}.document-item small{color:#8496ad;font-size:10px;margin-top:3px}.document-icon{display:grid;width:25px;height:28px;place-items:center;border:1px solid #4c607d;color:#9eb4d0;font-size:12px}.document-icon.answer_book{border-color:#876c39;color:#e4ba65}.empty-copy{color:#8292a9;font-size:12px;line-height:1.7}.invite-box{margin-top:26px;border-top:1px solid #2a3b54;padding-top:15px}.invite-box code{display:block;margin-top:8px;color:#f3cc77;overflow-wrap:anywhere;font-size:10px}.pdf-stage-card{padding:14px}.pdf-toolbar{display:flex;justify-content:space-between;align-items:center;padding-bottom:12px}.page-nav{display:flex;align-items:center;gap:8px;color:#99a9bd;font:11px DM Mono,monospace}.page-nav button{width:25px;height:24px;border:1px solid #3a4d67;background:#17253b;color:#d8e6f5}.pdf-stage{position:relative;width:100%;overflow:auto;max-height:630px;background:#cdd4dd;line-height:0;touch-action:none}.pdf-stage canvas{width:100%;height:auto;display:block}.selection-box{position:absolute;border:2px solid #e9bd5d;background:#eabe5526;pointer-events:none}.hint{margin:10px 0 0;color:#8192a8;font-size:11px}.pdf-empty,.workspace-empty{min-height:450px;display:grid;place-content:center;text-align:center;color:#91a3b8}.workspace-empty{border:1px dashed #40546f}.workspace-empty span{color:#d9af59;font:16px DM Mono}.workspace-empty h2{margin-bottom:0;color:#dce7f2;font-family:"Noto Serif SC",serif}.workspace-empty p{max-width:320px;line-height:1.7}.question-desk{margin-top:18px;padding:18px}.question-list-header{display:flex;justify-content:space-between}.draft-badge{color:#e1b85e;font-size:11px}.question-chip-row{display:flex;gap:6px;overflow:auto;padding:2px 0 12px}.chip{width:29px;height:29px;border:1px solid #374a64;color:#a9bad0;background:#111d30}.chip.active{color:#162236;border-color:#e1b457;background:#e1b457}.question-card{border-top:1px solid #2c3d56;padding-top:16px}.question-meta{display:flex;gap:10px;color:#91a4bb;font-size:11px}.question-card h2{font:500 17px/1.7 "Noto Serif SC",serif}.options{display:grid;gap:8px;margin:16px 0}.option{display:flex;text-align:left;gap:12px;align-items:center;padding:10px 12px;background:#121f32;color:#d6e2ef;border:1px solid #31445e}.option b{color:#e9bd63}.option.selected{border-color:#d8a84e;background:#26354e}.answer-result{display:flex;gap:10px;align-items:center;padding:11px;font-size:12px}.answer-result.correct{color:#a3dcba;background:#236f4d40}.answer-result.wrong{color:#f0b7a6;background:#81362938}.tutor-panel{padding:18px;min-height:740px}.tutor-head{display:flex;justify-content:space-between;align-items:start}.tutor-head h2{margin:5px 0 0;font-family:"Noto Serif SC",serif;font-size:19px}.status-dot,.pulse{width:9px;height:9px;border-radius:50%;background:#60bd91}.pulse{background:#e4b24f;animation:blink 1s infinite alternate}.tutor-actions{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin:22px 0 14px}.tutor-actions button{color:#bdcce0;background:#17253b;border:1px solid #344861;padding:8px 5px;font-size:11px}.tutor-actions button:last-child{grid-column:span 2}.tutor-output{min-height:260px;padding:15px;background:#050b1459;border-left:2px solid #d5a647;color:#cdd9e8;font-size:13px;line-height:1.75}.tutor-output p{margin:8px 0}.agent-thinking{color:#c6d5e8;white-space:pre-wrap}.tutor-output small{color:#94a9c1}.suggestion{width:100%;display:flex;justify-content:space-between;margin-top:11px;padding:8px;color:#e5be6c;background:#1d2b41;border:1px solid #4d5d70;font-size:11px}.profile-strip{border-top:1px solid #2b3b52;margin-top:18px;padding-top:15px}.profile-strip>div{display:flex;justify-content:space-between;margin-top:9px;color:#a6b6c8;font-size:12px}.profile-strip b{color:#e3bc66;font-family:DM Mono}.profile-strip p{color:#8294ac;font-size:12px;line-height:1.6}.auth-shell{min-height:100vh;display:grid;grid-template-columns:1.1fr .9fr;background:#0b1220}.auth-intro{padding:16vh 14%;background:radial-gradient(circle at 28% 28%,#27466f,transparent 47%),#101b2d}.auth-intro .brand-mark{margin-bottom:28px;width:50px;height:50px}.auth-intro h1{max-width:500px;margin:18px 0;font:600 42px/1.4 "Noto Serif SC",serif}.auth-intro p{max-width:480px;color:#9eafc4;line-height:1.9}.auth-card{align-self:center;width:min(390px,80%);margin:auto;padding:40px;border:1px solid #2c3d56;background:#121e31}.auth-card h2{margin:8px 0 26px;font-family:"Noto Serif SC",serif}.auth-card form{display:grid;gap:11px}.auth-card input{padding:12px;border:1px solid #354964;background:#0d1726;color:#e6eef8}.auth-card .primary-button{margin-top:8px}.form-error{color:#eca995;font-size:12px;margin:0}.auth-card .link-button{margin-top:14px;padding-left:0}.boot-screen{min-height:100vh;display:grid;place-items:center;font-family:"Noto Serif SC",serif;color:#cfdae9}@keyframes blink{to{opacity:.25}}.draft-actions{display:flex;align-items:center;gap:9px}
