:root{--paper:#F8FAFC;--surface:#FFFFFF;--surface-dim:#F1F5F9;--hairline:#E2E8F0;--ink:#1E293B;--ink-2:#64748B;--ink-3:#94A3B8;--accent:#0D9488;--accent-ink:#FFF;--accent-soft:#CCFBF1;--accent-ink-soft:#0F766E;--m-unseen:#CBD5E1;--m-practicing:#F59E0B;--m-provisional:#2DD4BF;--m-verified:#0D9488;--m-decayed:#F43F5E;--ok:#059669;--ok-soft:#D1FAE5;--err:#E11D48;--err-soft:#FFE4E6;--warn:#D97706;--warn-soft:#FEF3C7;--word-a:#0D9488;--word-a-soft:#F0FDFA;--word-b:#D97706;--word-b-soft:#FFFBEB;--serif:"Noto Serif SC",Georgia,"Times New Roman",serif;--sans:Inter,-apple-system,"PingFang SC","Noto Sans SC",sans-serif;--mono:"JetBrains Mono","SF Mono",Menlo,monospace;--shadow:0 10px 15px -3px rgba(15,23,42,.05),0 4px 6px -4px rgba(15,23,42,.04);--shadow-float:0 20px 40px rgba(15,23,42,.14);--blur:saturate(1.4) blur(20px);--radius-card:22px;--sidebar-w:220px;--outline-w:248px;--bar-h:64px;--top-h:56px;--top-class-h:124px;--reading-top-class-h:96px}*{box-sizing:border-box;margin:0;padding:0}html{min-width:1280px}body{background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}.sr-only{position:absolute;width:1px;height:1px;clip-path:inset(50%);overflow:hidden;white-space:nowrap}button{font-family:var(--sans);cursor:pointer;border:none;background:none;font-size:14px;color:var(--ink)}button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}.en{font-family:var(--serif)}.hl{color:var(--accent);font-weight:700;text-decoration:underline;text-underline-offset:3px}.muted{color:var(--ink-2)}.faint{color:var(--ink-3)}.app-shell{min-height:100vh}.app-main{min-height:100vh;margin-left:var(--sidebar-w);min-width:0}.app-shell.lesson-shell .app-main{margin-left:0}#sidebar{position:fixed;inset:0 auto 0 0;z-index:50;width:var(--sidebar-w);display:flex;flex-direction:column;background:#ffffffe0;backdrop-filter:var(--blur);-webkit-backdrop-filter:var(--blur);border-right:1px solid var(--hairline)}.side-brand{padding:27px 26px 21px;font-size:20px;line-height:1;font-weight:800;letter-spacing:.2px;color:var(--accent)}.side-nav{display:flex;flex-direction:column;gap:6px;padding:10px 14px}.side-nav a{display:flex;align-items:center;min-height:44px;padding:10px 14px;border-radius:12px;color:var(--ink-2);text-decoration:none;font-size:14px;font-weight:500;transition:background .15s ease,color .15s ease,transform .15s ease}.side-nav a:hover:not(.on){background:var(--surface-dim);color:var(--ink);transform:translate(2px)}.side-nav a.on{background:var(--accent);color:#fff;font-weight:600;box-shadow:0 8px 18px #0d948829}.side-account{margin:auto 14px 18px;padding:16px 12px 4px;border-top:1px solid var(--hairline);display:flex;align-items:center;gap:11px}.side-avatar{width:34px;height:34px;flex:none;display:flex;align-items:center;justify-content:center;border-radius:50%;background:var(--accent-soft);color:var(--accent-ink-soft);font-family:var(--mono);font-size:13px;font-weight:700}.side-identity{min-width:0;display:flex;flex-direction:column;align-items:flex-start;line-height:1.35}.side-name{max-width:128px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink-2);font-size:13px;font-weight:600}.side-logout{margin-top:2px;color:var(--ink-3);font-size:12px}.side-logout:hover{color:var(--accent)}#topbar{height:var(--top-h);position:sticky;top:0;z-index:50;display:flex;align-items:center;padding:0 28px;gap:28px;background:#f7f6f3d1;backdrop-filter:var(--blur);-webkit-backdrop-filter:var(--blur);border-bottom:1px solid var(--hairline)}#topbar.inclass{height:var(--top-class-h)}#topbar.inclass.reading-topbar{height:var(--reading-top-class-h)}#progressline{position:absolute;top:0;left:0;height:2px;background:var(--accent);width:100%;transform:scaleX(0);transform-origin:left;transition:transform .25s ease-out}#classbar{display:flex;align-items:center;gap:10px;flex:1;min-width:0}.backbtn{color:var(--ink-2);padding:6px 13px;border-radius:999px;font-size:14px;margin-right:2px}.backbtn:hover{background:var(--surface-dim);color:var(--accent)}.btn{border-radius:999px;padding:11px 26px;font-size:15px;font-weight:600;transition:transform .12s ease-out,background .12s}.btn:active{transform:scale(.97)}.btn.pri{background:var(--accent);color:var(--accent-ink)}.btn.pri:hover{background:#0f766e}.btn.ghost{color:var(--ink-2)}.btn.ghost:hover{background:var(--surface-dim);color:var(--ink)}.btn:disabled{opacity:.35;cursor:default;transform:none}.pill{display:inline-block;padding:3px 12px;border-radius:999px;font-size:12px;background:var(--surface-dim);color:var(--ink-2)}.pill.warn{background:var(--warn-soft);color:var(--warn)}.pill.err{background:var(--err-soft);color:var(--err)}.pill.acc{background:var(--accent-soft);color:var(--accent-ink-soft)}.sheet{background:var(--surface);border:1px solid var(--hairline);border-radius:var(--radius-card);box-shadow:var(--shadow)}details.more{margin-top:22px}details.more>summary{list-style:none;cursor:pointer;font-size:13px;color:var(--ink-3);display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px}details.more>summary:hover{background:var(--surface-dim);color:var(--ink-2)}details.more>summary:before{content:"›";transition:transform .15s;display:inline-block;font-size:15px}details.more[open]>summary:before{transform:rotate(90deg)}details.more .body{margin-top:12px;padding:18px 20px;background:var(--surface-dim);border-radius:14px;font-size:14px;line-height:1.7;color:var(--ink-2)}.page{max-width:920px;margin:0 auto;padding:56px 32px 120px}.hello h1{font-size:30px;font-weight:700;letter-spacing:-.2px}.hello p{color:var(--ink-3);margin-top:6px;font-size:14px}.taskmain{margin-top:28px;padding:36px 40px;display:flex;align-items:center;gap:24px}.taskmain .fam{font-family:var(--mono);font-weight:700;font-size:48px;line-height:1.1;letter-spacing:-1px}.taskmain .meta{flex:1}.taskmain .why{color:var(--ink-2);font-size:14px;margin-top:12px}.taskmain .right{text-align:right}.taskmain .mins{color:var(--ink-3);font-size:13px;margin-bottom:14px}#page-class{display:flex;height:calc(100vh - var(--top-class-h))}#page-class.reading-class-page{height:calc(100vh - var(--reading-top-class-h))}#outline{width:var(--outline-w);flex:none;overflow-y:auto;padding:28px 14px 120px;transition:width .2s ease-out,opacity .2s}#page-class.no-outline #outline{width:0;padding:0;opacity:0;overflow:hidden}.ol-node{width:100%;text-align:left;padding:9px 14px;border-radius:10px;font-size:14px;color:var(--ink-2);display:flex;align-items:center;gap:9px;cursor:pointer;-webkit-user-select:none;user-select:none}.ol-node:hover{background:var(--surface-dim)}.ol-node.cur{background:var(--surface);box-shadow:var(--shadow);color:var(--ink);font-weight:600}.ol-node.lock{color:var(--ink-3);cursor:default}.ol-node.lock:hover{background:none}.ol-node .st{width:18px;height:18px;border-radius:50%;flex:none;display:flex;align-items:center;justify-content:center;font-size:11px;background:var(--surface-dim);color:var(--ink-3)}.ol-node.done .st{background:var(--accent-soft);color:var(--accent)}.ol-node.cur .st{background:var(--accent);color:#fff}.ol-node .en{letter-spacing:.5px}#ol-toggle{position:fixed;left:14px;bottom:calc(var(--bar-h) + 20px);z-index:41;width:36px;height:36px;border-radius:50%;background:var(--surface);box-shadow:var(--shadow);color:var(--ink-3);font-size:15px}#stage{flex:1;overflow-y:auto;padding:24px 32px 64px}#stagewrap{flex:1;display:flex;flex-direction:column;min-width:0}#familybar{flex:1;min-width:0;height:100%;margin:0;padding:10px 0;display:flex;align-items:stretch;gap:24px;overflow:hidden}.fb-word-sec{flex:0 0 auto;display:flex;flex-direction:column;justify-content:center;gap:5px;max-width:360px;min-width:0}.fb-word{font-family:var(--mono);font-weight:700;font-size:30px;letter-spacing:-1px;line-height:1}.fb-ipa{font-family:var(--mono);color:var(--accent);font-size:13px}.fb-sep{flex:0 0 auto;align-self:stretch;width:1px;background:#cbd5e1;margin:8px 0}.fb-phys-sec{flex:1;min-width:0;display:flex;align-items:center;gap:20px}.fb-phys-img{flex:0 0 auto;display:flex;align-items:center}.fb-phys-img svg{height:64px;width:auto;display:block}.fb-story{flex:1;min-width:0;display:flex;flex-direction:column;align-items:flex-start;gap:7px}.fb-phys-text{min-width:0;font-size:13px;color:var(--ink-2);line-height:1.55;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.fb-tag{display:inline-block;font-size:11px;color:var(--accent-ink-soft);background:var(--accent-soft);border-radius:6px;padding:2px 8px;font-weight:600}#actionbar{height:var(--bar-h);flex:none;position:relative;display:flex;align-items:center;background:#f7f6f3d9;backdrop-filter:var(--blur);-webkit-backdrop-filter:var(--blur);border-top:1px solid var(--hairline);padding:0 28px}#actionbar .mid{position:absolute;left:50%;transform:translate(-50%);display:flex;align-items:center;gap:16px;font-size:13px;color:var(--ink-3)}#ab-pos{font-variant-numeric:tabular-nums}#ab-hint{color:var(--warn);font-size:14px;padding:8px 16px;border-radius:999px}#ab-hint:hover{background:var(--warn-soft)}#ab-prev{margin-right:auto}#ab-next{margin-left:auto;min-width:132px}.step{background:var(--surface);border:1px solid var(--hairline);border-radius:var(--radius-card);box-shadow:var(--shadow);padding:34px 38px}.step h2{font-size:24px;font-weight:700;letter-spacing:-.2px;display:flex;align-items:center;gap:12px}.step h2:before{content:"";width:5px;height:26px;border-radius:999px;background:var(--accent);flex:none}.step .kicker{font-size:12px;letter-spacing:2px;color:var(--accent);font-weight:600;text-transform:uppercase;margin-bottom:14px}.chapter{text-align:center;padding:64px 40px 52px;background:var(--surface);border:1px solid var(--hairline);border-radius:var(--radius-card);box-shadow:var(--shadow)}.chapter .w{font-family:var(--mono);font-weight:700;font-size:52px;letter-spacing:-1px;line-height:1.1}.chapter .ipa{font-family:var(--serif);color:var(--ink-3);font-size:18px;margin-top:14px}.chapter .speak{margin-top:22px;width:44px;height:44px;border-radius:50%;background:var(--surface);box-shadow:var(--shadow);font-size:17px}.chapter .decomp{margin:34px auto 0;max-width:460px;font-family:var(--mono);font-size:14px;color:var(--accent-ink-soft);background:var(--accent-soft);border-radius:14px;padding:14px 20px}.def-en{font-family:var(--serif);font-size:21px;line-height:1.65;margin-top:26px}.def-zh{font-size:15px;color:var(--ink-2);margin-top:10px}.exblock{margin-top:28px;padding:24px 28px;background:var(--surface-dim);border:1px solid var(--hairline);border-radius:16px}.exblock .en{font-size:20px;line-height:1.7}.exblock .zh{font-size:14px;color:var(--ink-2);margin-top:10px}.collocbar{font-family:var(--mono);font-weight:600;font-size:24px;text-align:center;padding:26px;background:var(--word-a-soft);border:1px solid var(--hairline);border-left:4px solid var(--accent);border-radius:16px;box-shadow:var(--shadow);margin-top:26px}.nb{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:26px}.nb .side{border-radius:18px;padding:24px}.nb .a{background:var(--word-a-soft)}.nb .b{background:var(--word-b-soft)}.nb .w{font-family:var(--mono);font-size:24px;font-weight:700}.nb .a .w{color:var(--word-a)}.nb .b .w{color:var(--word-b)}.nb dt{font-size:11px;color:var(--ink-3);margin-top:14px;letter-spacing:1.5px}.nb dd{font-size:14px;line-height:1.65}.nbkey{margin-top:16px;font-size:14.5px;line-height:1.8;color:var(--ink-2)}.inftable{width:100%;border-collapse:collapse;margin-top:26px;font-size:15px}.inftable td{padding:13px 6px;border-top:1px solid var(--hairline)}.inftable tr:first-child td{border-top:none}.inftable td:first-child{color:var(--ink-3);width:42%}.inftable td:last-child{font-family:var(--serif);font-size:17px}.qbody{font-family:var(--serif);font-size:20px;line-height:1.95;margin-top:26px;white-space:pre-wrap}.question-step>.qbody:first-child{margin-top:0}.qbody .cue{font-style:italic;color:var(--ink-2)}input.gap{font-family:var(--mono);font-size:17px;border:none;border-bottom:2px solid var(--ink-3);background:transparent;padding:2px 8px;min-width:160px;text-align:center}input.gap:focus{border-bottom-color:var(--accent);outline:none}.slots{display:flex;gap:8px;margin-top:34px;justify-content:center}.slot{width:46px;height:56px;border-radius:12px;font-family:var(--mono);font-size:24px;text-align:center;line-height:56px;background:var(--surface-dim);border:1px solid var(--hairline)}.slot.given{color:var(--ink-3)}.slot input{width:100%;height:100%;border:none;background:transparent;font:inherit;text-align:center}.slot input:focus{outline:none}.slot:focus-within{box-shadow:0 0 0 2px var(--accent),var(--shadow)}.opts{display:flex;flex-direction:column;gap:10px;margin-top:30px}.opt{border-radius:14px;padding:16px 22px;font-family:var(--serif);font-size:16.5px;text-align:left;background:var(--surface-dim);border:1px solid var(--hairline);transition:transform .12s}.opt:hover{transform:translateY(-1px)}.opt.sel{box-shadow:0 0 0 2px var(--accent) inset,var(--shadow)}.opt.right{background:var(--ok-soft);box-shadow:0 0 0 2px var(--ok) inset}.opt.wrong{background:var(--err-soft);box-shadow:0 0 0 2px var(--err) inset}.opt.dim{opacity:.45}textarea.prod{width:100%;margin-top:26px;border:1px solid var(--hairline);border-radius:16px;padding:20px;font-family:var(--serif);font-size:18px;line-height:1.7;min-height:100px;resize:vertical;background:var(--surface-dim)}.invalidbar{margin-top:20px;padding:14px 18px;background:var(--warn-soft);border-radius:14px;color:var(--warn);font-size:14px}.hintbox{margin-top:20px;padding:14px 18px;background:var(--warn-soft);border-radius:14px;font-size:14px;line-height:1.65}.usedhint{position:absolute;top:-6px;right:0}.feedback{margin-top:30px;border-radius:18px;padding:24px 26px}.feedback.ok{background:var(--ok-soft)}.feedback.err{background:var(--err-soft)}.feedback.uncertain{background:var(--warn-soft)}.feedback .verdict{font-weight:800;font-size:16px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}.feedback .basis{margin-top:12px;font-size:14px;line-height:1.75}.feedback .anskey{font-family:var(--serif);font-size:18px;margin-top:10px}.aiexp{margin-top:14px}.aiexp>button{color:var(--accent);font-weight:600;font-size:14px}.aiexp .body{display:none;margin-top:12px;padding:16px;background:var(--surface-dim);border:1px solid var(--hairline);border-radius:12px;font-size:14px;line-height:1.75}.aiexp.open .body{display:block}.sumstats{display:flex;gap:44px;margin:30px 0 8px}.sumstats b{font-size:34px;font-family:var(--serif);display:block;line-height:1.2}.sumstats span{font-size:13px;color:var(--ink-3)}.summary-overview{display:flex;align-items:center;justify-content:space-between;gap:28px}.summary-review-entry{display:flex;flex-direction:column;align-items:flex-end;gap:8px;min-width:220px}.summary-review-entry span{font-size:11px;color:var(--ink-3);text-align:right}.teacher-review-btn{min-width:190px;padding:12px 20px;border:1px solid var(--accent);border-radius:14px;color:var(--accent);background:var(--surface);font-size:14px;font-weight:700;box-shadow:var(--shadow)}.teacher-review-btn:not(:disabled):hover{background:var(--accent-soft);transform:translateY(-1px)}.teacher-review-btn:disabled{color:var(--ink-3);border-color:var(--hairline);background:var(--surface-dim);cursor:default;box-shadow:none}.nextplan{margin-top:30px;padding:18px 22px;background:var(--accent-soft);border-radius:16px;font-size:14.5px;color:var(--accent);font-weight:600}#toast{position:fixed;top:72px;left:50%;transform:translate(-50%);background:#28271feb;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);color:#fff;padding:11px 22px;border-radius:999px;font-size:14px;opacity:0;transition:opacity .2s;z-index:99;pointer-events:none}#toast.show{opacity:1}.login{max-width:420px;margin:120px auto;text-align:center}.login input{width:100%;margin-top:24px;border:1px solid var(--hairline);border-radius:14px;padding:14px 18px;font-size:15px;background:var(--surface)}@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}.statnums{display:flex;gap:52px;margin:28px 0}.statnums .n b{font-size:36px;font-family:var(--serif);display:block;line-height:1.2}.statnums .n span{font-size:13px;color:var(--ink-3)}.map{display:grid;grid-template-columns:repeat(auto-fill,minmax(106px,1fr));gap:12px}.tile{width:100%;border:1px solid var(--hairline);border-radius:14px;padding:12px 10px 10px;text-align:center;cursor:pointer;background:var(--surface);box-shadow:var(--shadow);transition:transform .12s}.tile:hover{transform:translateY(-2px)}.tile .tw{font-family:var(--serif);font-size:13px;letter-spacing:.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.tile .bar{height:5px;border-radius:3px;margin-top:9px;background:var(--surface-dim);overflow:hidden}.tile .bar i{display:block;height:100%}.legend{display:flex;gap:18px;margin:20px 0;font-size:13px;color:var(--ink-2);flex-wrap:wrap}.mdot{display:inline-block;width:9px;height:9px;border-radius:50%;flex:none;vertical-align:middle;margin-right:5px}#drawer{position:fixed;top:var(--top-h);right:0;width:480px;bottom:0;background:var(--surface);box-shadow:var(--shadow-float);transform:translate(110%);transition:transform .2s ease-out;z-index:60;overflow-y:auto;padding:32px;border-radius:20px 0 0;overscroll-behavior:contain}#drawer.open{transform:translate(0)}#drawer h3{font-family:var(--mono);font-weight:700;font-size:24px;letter-spacing:0}.dimgrid{width:100%;border-collapse:collapse;margin-top:20px;font-size:13px}.dimgrid th{font-weight:500;color:var(--ink-3);padding:8px 6px;text-align:center;font-size:12px}.dimgrid td{padding:12px 6px;border-top:1px solid var(--hairline);text-align:center}.dimgrid td:first-child{text-align:left;font-family:var(--serif);font-size:14px}.sdot{width:17px;height:17px;border-radius:50%;display:inline-block;cursor:pointer;border:none;padding:0}.evbox{margin-top:20px;padding:16px;background:var(--surface-dim);border-radius:14px;font-size:13px;line-height:1.7;color:var(--ink-2)}.wrongstat{display:flex;gap:10px;margin:22px 0 18px;flex-wrap:wrap}.wrongstat .s{font-size:13px;color:var(--ink-2);background:var(--surface-dim);border-radius:999px;padding:5px 14px}.wcard{background:var(--surface);border:1px solid var(--hairline);border-radius:var(--radius-card);box-shadow:var(--shadow);padding:22px 26px;margin-bottom:14px;transition:opacity .3s}.wcard .whead{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.wcard .wq{font-family:var(--serif);font-size:17px;line-height:1.7;margin-top:14px;color:var(--ink)}.wcard .wans{display:flex;gap:22px;margin-top:12px;font-size:14px;flex-wrap:wrap}.wcard .wans .k{color:var(--ink-3);font-size:12px;margin-right:6px}.wcard .wa-wrong{color:var(--err);text-decoration:line-through}.wcard .wa-right{color:var(--ok);font-weight:600}.wcard .wfoot{margin-top:16px;display:flex;align-items:center;gap:12px;font-size:13px;color:var(--ink-3)}.wempty{text-align:center;padding:80px 0;color:var(--ink-3)}#chatcol{width:456px;flex:none;display:flex;flex-direction:column;background:#fff9;border-left:1px solid var(--hairline);transition:width .2s ease-out;overscroll-behavior:contain;min-width:0}#chatcol .chatbody{display:flex;flex-direction:column;height:100%;min-width:408px}.chathead{padding:14px 18px;display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--hairline);background:var(--surface)}.chathead b{font-size:14px}.msgs{flex:1;overflow-y:auto;padding:18px;display:flex;flex-direction:column;gap:12px;overscroll-behavior:contain}.msg{max-width:88%;font-size:14px;line-height:1.6;border-radius:14px;padding:11px 15px;white-space:pre-wrap}.msg.ai{background:var(--surface-dim);align-self:flex-start}.msg.me{background:var(--accent-soft);align-self:flex-end}.msg.review{max-width:100%;width:100%;border:1px solid var(--accent-soft);border-left:4px solid var(--accent);background:var(--surface);box-shadow:var(--shadow);line-height:1.75}.msg.failed{color:#9f1239;background:var(--err-soft)}.msg[aria-busy=true]{color:var(--ink-2)}.chatinput{display:flex;gap:8px;padding:12px 18px 18px}.chatinput input{flex:1;border:none;border-radius:999px;padding:11px 18px;font-size:14px;background:var(--surface-dim)}.chatinput input:focus{outline:2px solid var(--accent)}.admin-table{width:100%;border-collapse:collapse;margin-top:14px;font-size:13.5px;background:var(--surface);border:1px solid var(--hairline);border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}.admin-table th{font-weight:600;color:var(--ink-3);text-align:left;padding:11px 14px;font-size:12px;letter-spacing:.5px;border-bottom:1px solid var(--hairline);background:var(--surface-dim)}.admin-table td{padding:11px 14px;border-bottom:1px solid var(--hairline)}.admin-table tr:last-child td{border-bottom:none}.admin-input{border:1px solid var(--hairline);border-radius:10px;padding:8px 14px;font-size:14px;background:var(--surface-dim);min-width:170px}.admin-input:focus{outline:2px solid var(--accent)}.alink{color:var(--accent);font-size:13px;padding:3px 8px;border-radius:8px}.alink:hover{background:var(--accent-soft)}.alink.danger{color:var(--err)}.alink.danger:hover{background:var(--err-soft)}#cardscroll{flex:1;overflow-y:auto;padding:26px 30px 80px;min-width:0}.cardscroll-inner{max-width:940px;margin:0 auto;display:flex;flex-direction:column;gap:26px}#cardscroll .wcard{--lesson-card-line:#E8EEF5;--lesson-card-soft:#F9FAFC;--lesson-card-mint:#FBFFFE;background:#fff;border:1px solid var(--hairline);border-radius:var(--radius-card);box-shadow:var(--shadow);overflow:hidden;padding:0;margin-bottom:0;transition:box-shadow .2s,border-color .2s}#cardscroll .wcard.active{border-color:var(--accent-soft);box-shadow:var(--shadow-float)}.wc-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 26px;border-bottom:1px solid var(--lesson-card-line,#E8EEF5);background:linear-gradient(90deg,var(--lesson-card-mint,#FBFFFE) 0%,#fff 72%)}.wc-head-l{display:flex;align-items:center;gap:9px;flex-wrap:wrap;min-width:0}.wc-sense{display:inline-flex;align-items:center;gap:7px;flex-wrap:nowrap;min-width:0}.wc-sense-sep{width:1px;height:18px;background:var(--hairline);margin:0 2px;flex:none}.wc-sense-def{font-size:14px;font-weight:600;color:var(--ink);white-space:nowrap}.wc-no{font-family:var(--mono);font-weight:700;font-size:12px;color:var(--accent-ink-soft);background:var(--accent-soft);padding:2px 8px;border-radius:7px;flex:none}.wc-word{font-family:var(--mono);font-weight:700;font-size:26px;letter-spacing:-.5px;color:var(--ink);line-height:1}.wc-speak{width:30px;height:30px;border-radius:50%;background:#ccfbf173;color:var(--accent);display:inline-flex;align-items:center;justify-content:center;flex:none}.wc-speak-icon{width:17px;height:17px;display:block;fill:none;stroke:currentColor;stroke-width:2.25;stroke-linecap:round;stroke-linejoin:round}.wc-speak:hover{background:var(--accent);color:#fff}.wc-ipa{font-family:var(--mono);color:var(--ink-3);font-size:13px}.wc-body{padding:26px 30px;min-height:300px;container-type:inline-size;background:#fff}.wcard.is-summary .wc-body{min-height:auto;padding-top:32px;padding-bottom:32px}.wcard.is-summary .sumstats{margin:0}.wc-foot{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:14px;padding:14px 26px;border-top:1px solid var(--lesson-card-line,#E8EEF5);background:var(--lesson-card-soft,#F9FAFC)}.wc-prev{justify-self:start;width:max-content;min-width:112px;display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;color:var(--ink-3);padding:8px 14px;border-radius:10px}.wc-prev:not(:disabled):hover{color:var(--ink);background:var(--surface-dim)}.wc-prev:disabled{opacity:.3;cursor:default}.wc-crumb{font-size:12px;color:var(--ink-3);font-family:var(--mono);justify-self:center;text-align:center}.wc-next{font-size:13px;padding:9px 20px}.wc-complete{justify-self:end;display:flex;align-items:center;justify-content:flex-end;gap:12px;min-width:0}.wc-complete-hint{font-size:12px;color:var(--ink-3);white-space:nowrap;cursor:pointer;-webkit-user-select:none;user-select:none}.wc-complete-hint:hover{color:var(--ink-2)}.pane{animation:paneIn .25s ease-out}@keyframes paneIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.pane-label{display:block;font-size:10px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;color:var(--ink-3);margin-bottom:8px}.tag{display:inline-block;font-size:11px;font-weight:700;padding:2px 9px;border-radius:6px}.tag-accent{color:var(--accent-ink-soft);background:var(--accent-soft)}.tag-blue{color:#1d4ed8;background:#dbeafe}.tag-green{color:#047857;background:#d1fae5}.tag-muted{color:var(--ink-2);background:var(--surface-dim)}.pane-cover{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:28px}.cov-left{display:flex;flex-direction:column;gap:20px}.morph-box{background:var(--lesson-card-soft,#F9FAFC);border:1px solid var(--lesson-card-line,#E8EEF5);border-radius:14px;padding:14px 16px}.morph-code{font-family:var(--mono);font-size:14px;font-weight:600;color:var(--accent-ink-soft)}.morph-concept{font-size:12px;color:var(--ink-2);margin-top:6px}.evo-text{font-size:13px;color:var(--ink-2);line-height:1.7}.cov-right{min-width:0}.infl-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:10px}.infl-cell{background:var(--lesson-card-soft,#F9FAFC);border:1px solid var(--lesson-card-line,#E8EEF5);border-radius:12px;padding:11px 13px;display:flex;flex-direction:column;gap:3px}.infl-cell:first-child{background:var(--lesson-card-mint,#FBFFFE);border-color:#d7f7f1}.infl-form{font-family:var(--mono);font-weight:700;font-size:14px;color:var(--ink)}.infl-name{font-size:11px;color:var(--ink-3)}.pane-sense{display:flex;flex-direction:column;gap:18px}.sense-def p.def-en{font-size:13px;color:var(--ink-2);font-style:italic;margin-top:2px;line-height:1.6}.ex-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin-top:8px}.mini-card{background:var(--lesson-card-soft,#F9FAFC);border:1px solid var(--lesson-card-line,#E8EEF5);border-radius:14px;padding:14px 16px}.mini-en{font-size:12.5px;color:var(--ink-2);font-style:italic;line-height:1.6}.mini-zh{font-size:11.5px;color:var(--ink-3);margin-top:5px}.pane-syn{display:flex;flex-direction:column;gap:14px}.syn-box{display:flex;flex-direction:column;gap:12px}.syn-item{border-radius:14px;padding:13px 16px;border:1px solid}.syn-item.syno{background:#ccfbf147;border-color:var(--accent-soft)}.syn-item.anto{background:var(--err-soft);border-color:#fecdd3}.syn-name{display:block;font-size:13px;font-weight:700;margin-bottom:4px}.syn-item.syno .syn-name{color:var(--accent-ink-soft)}.syn-item.anto .syn-name{color:#be123c}.syn-exp{font-size:12.5px;color:var(--ink-2);line-height:1.7}.syn-ex{font-size:11.5px;color:var(--ink-3);font-style:italic;margin-top:6px;line-height:1.6}.pane-nb{display:flex;flex-direction:column;gap:16px}.nb-cells{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:10px}.nb-cell{border-radius:12px;padding:12px;text-align:center;border:1px solid}.nb-cell.self{background:var(--accent-soft);border-color:var(--accent-soft)}.nb-cell.other{background:var(--warn-soft);border-color:#fde68a}.nb-word{display:block;font-family:var(--mono);font-weight:700;font-size:14px}.nb-cell.self .nb-word{color:var(--accent-ink-soft)}.nb-cell.other .nb-word{color:#b45309}.nb-sub{font-size:11px;color:var(--ink-3)}.nb-details{display:flex;flex-direction:column;gap:10px}.nb-detail{background:var(--lesson-card-soft,#F9FAFC);border:1px solid var(--lesson-card-line,#E8EEF5);border-radius:12px;padding:13px 16px}.nb-key{font-size:12.5px;color:var(--ink-2);line-height:1.7}.nb-key b.en{color:var(--ink)}.nb-ex{font-size:11.5px;color:var(--ink-3);font-style:italic;margin-top:8px;line-height:1.6}.pane-colloc{display:flex;flex-direction:column}.cloud-wrap{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(320px,.95fr);gap:20px;align-items:stretch}.cloud-panel{min-width:0;padding:10px;border:1px solid #CFE8E4;border-radius:18px;overflow:hidden;background:#f7fcfb;box-shadow:inset 0 1px #fffffff0}.cloud-stage{height:390px;position:relative;isolation:isolate;overflow:hidden;perspective:800px}.cloud-globe{position:absolute;left:50%;top:51%;z-index:0;width:min(94%,420px);height:auto;display:block;pointer-events:none;-webkit-user-select:none;user-select:none;transform:translate(-50%,-50%);opacity:0;animation:globeReveal .55s cubic-bezier(.2,.8,.2,1) forwards}.cloud-chip{--state-scale:0;position:absolute;left:var(--x);top:var(--y);z-index:var(--cloud-depth);width:170px;min-height:56px;padding:9px 13px;border:1px solid #C7D9DD;border-radius:16px;background:#fdfefe;box-shadow:0 10px 17px #1e404824,inset 0 2px #fffffff5,inset 0 -4px #4c707714;font-family:var(--serif);font-size:17px;font-weight:700;line-height:1.22;letter-spacing:-.3px;color:#27455a;text-align:center;text-wrap:balance;opacity:0;transform:translate(-50%,-50%) rotate(var(--cloud-tilt)) scale(calc(var(--cloud-scale) + var(--state-scale)));animation:globeTileIn .42s cubic-bezier(.2,.8,.2,1) var(--cloud-delay) forwards;transition:color .18s ease,background .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease,width .18s ease}.cloud-chip-mint{background:#f3fcfa;border-color:#b9ddd7}.cloud-chip-aqua{background:#eaf8f7;border-color:#b7d8d7}.cloud-chip-blue{background:#eef5fc;border-color:#c2d5e7}.cloud-chip-cream{background:#fff8ea;border-color:#e5d2aa}.cloud-chip:hover:not(.on){--state-scale:.04;color:var(--accent-ink-soft);border-color:#78beb6;box-shadow:0 14px 22px #0f766e29,inset 0 2px #fffffffa,inset 0 -4px #0f766e14}.cloud-chip:active{--state-scale:-.02}.cloud-chip.on{--state-scale:.05;z-index:20;width:190px;min-height:66px;color:#fff;background:#0f766e;border-color:#0b665f;font-size:18.5px;box-shadow:0 17px 28px #0f766e4d,inset 0 2px #fff3,inset 0 -5px #054a4547}.cloud-chip:focus-visible{outline:2px solid var(--accent);outline-offset:3px}@keyframes globeReveal{0%{opacity:0;transform:translate(-50%,calc(-50% + 8px)) scale(.97)}to{opacity:.96;transform:translate(-50%,-50%) scale(1)}}@keyframes globeTileIn{0%{opacity:0;transform:translate(-50%,calc(-50% + 9px)) rotate(var(--cloud-tilt)) scale(calc(var(--cloud-scale) - .05))}to{opacity:1;transform:translate(-50%,-50%) rotate(var(--cloud-tilt)) scale(calc(var(--cloud-scale) + var(--state-scale)))}}.cloud-stage-mist{background:#fbfefd;perspective:none}.cloud-mist{position:absolute;inset:-3%;z-index:0;width:106%;height:106%;display:block;object-fit:cover;pointer-events:none;-webkit-user-select:none;user-select:none;opacity:.38}.cloud-word{position:absolute;left:var(--x);top:var(--y);z-index:var(--cloud-depth);width:max-content;max-width:46%;padding:6px 8px;border:0;background:transparent;font-family:var(--serif);font-size:var(--cloud-font-size);font-weight:650;line-height:1.18;letter-spacing:-.25px;color:#356c70;text-align:center;text-wrap:balance;opacity:0;filter:blur(var(--cloud-blur));transform:translate(-50%,-50%) rotate(var(--cloud-tilt));animation:mistWordIn .52s cubic-bezier(.2,.8,.2,1) var(--cloud-delay) forwards;transition:color .18s ease,opacity .18s ease,filter .18s ease,text-decoration-color .18s ease}.cloud-word:hover:not(.on){color:#166d68;opacity:.9;filter:blur(0)}.cloud-word.on{color:#0f766e;font-weight:750;opacity:1;filter:blur(0);text-decoration-line:underline;text-decoration-thickness:1.5px;text-underline-offset:5px;text-decoration-color:#0f766e}.cloud-word:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px;opacity:1;filter:blur(0)}@keyframes mistWordIn{0%{opacity:0;filter:blur(2px);transform:translate(-50%,calc(-50% + 8px)) rotate(var(--cloud-tilt))}to{opacity:var(--cloud-opacity);filter:blur(var(--cloud-blur));transform:translate(-50%,-50%) rotate(var(--cloud-tilt))}}.cloud-stage-vortex{background:#fbfefd;perspective:none}.cloud-vortex{position:absolute;inset:-2%;z-index:0;width:104%;height:104%;display:block;object-fit:cover;pointer-events:none;-webkit-user-select:none;user-select:none;opacity:.84}.cloud-vortex-word{position:absolute;left:var(--x);top:var(--y);z-index:var(--cloud-depth);width:max-content;max-width:52%;padding:6px 8px;border:0;background:transparent;font-family:var(--serif);font-size:var(--cloud-font-size);font-weight:650;line-height:1.18;letter-spacing:-.25px;color:#236a6a;text-align:center;text-wrap:balance;opacity:0;filter:blur(var(--cloud-blur));transform:translate(-50%,-50%) rotate(var(--cloud-tilt));animation:vortexWordIn .56s cubic-bezier(.2,.8,.2,1) var(--cloud-delay) forwards;transition:color .18s ease,opacity .18s ease,filter .18s ease,text-decoration-color .18s ease}.cloud-vortex-word-primary{max-width:78%}.cloud-vortex-word:hover:not(.on){color:#0c6661;opacity:.92;filter:blur(0)}.cloud-vortex-word.on{color:#075e59;font-weight:750;opacity:1;filter:blur(0);text-decoration-line:underline;text-decoration-thickness:1.5px;text-underline-offset:6px;text-decoration-color:#169b91}.cloud-vortex-word:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px;opacity:1;filter:blur(0)}@keyframes vortexWordIn{0%{opacity:0;filter:blur(1.4px);transform:translate(-50%,calc(-50% + 10px)) rotate(var(--cloud-tilt))}to{opacity:var(--cloud-opacity);filter:blur(var(--cloud-blur));transform:translate(-50%,-50%) rotate(var(--cloud-tilt))}}.cloud-detail{min-width:0;min-height:410px;padding:20px 22px;display:flex;flex-direction:column;border:1px solid var(--hairline);border-radius:18px;background:linear-gradient(160deg,#f8fafc,#eef4f7);box-shadow:inset 0 1px #ffffffe6}.cd-content{flex:1;display:flex;flex-direction:column;animation:detailSwap .22s ease-out}@keyframes detailSwap{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}.cd-top{display:flex;align-items:flex-start;gap:9px;flex-wrap:wrap;margin-top:2px}.cd-head{font-family:var(--mono);font-weight:750;font-size:20px;line-height:1.3;letter-spacing:-.45px;color:var(--accent-ink-soft)}.cd-zh{font-size:14px;font-weight:700;color:var(--ink);margin-top:17px;line-height:1.6}.cd-endef{font-size:12.5px;color:var(--ink-2);font-style:italic;margin-top:6px;line-height:1.7}.cd-ex{margin-top:auto;padding:15px 16px 14px;background:#ffffffd1;border:1px solid rgba(148,163,184,.24);border-left:3px solid var(--accent);border-radius:4px 14px 14px 4px;box-shadow:0 6px 18px #0f172a0a}.cd-ex-label{display:block;margin-bottom:8px;font-family:var(--mono);font-size:8px;font-weight:800;letter-spacing:1.5px;text-transform:uppercase;color:var(--accent)}.cd-ex-en{font-size:13px;color:var(--ink-2);font-style:italic;line-height:1.75}.cd-ex-zh{font-size:11.5px;color:var(--ink-3);margin-top:7px;line-height:1.65}@container (max-width:760px){.cloud-wrap{grid-template-columns:1fr}.cloud-stage{height:390px}.cloud-detail{min-height:300px}}@container (max-width:560px){.cloud-panel{padding:16px}.cloud-stage{height:auto;min-height:0;margin:14px 0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;overflow:visible}.cloud-globe{display:none}.cloud-chip{position:relative;left:auto;top:auto;z-index:auto;width:auto;min-height:48px;transform:none!important;animation:none;opacity:1;font-size:13.5px;padding:8px}.cloud-chip.on{width:auto;min-height:48px;font-size:14px}.cloud-chip.on{transform:none!important}.cloud-mist,.cloud-vortex{display:none}.cloud-word,.cloud-vortex-word{position:relative;left:auto;top:auto;z-index:auto;width:auto;max-width:none;min-height:48px;padding:9px 7px;border-bottom:1px solid rgba(207,232,228,.72);transform:none!important;animation:none;opacity:1;filter:none;font-size:14px!important;display:flex;align-items:center;justify-content:center}.cloud-word.on,.cloud-vortex-word.on{background:#f1faf8;border-radius:8px;text-decoration:none}.cloud-detail{min-height:0}}@media(prefers-reduced-motion:reduce){.cloud-globe,.cloud-chip,.cloud-word,.cloud-vortex-word,.cd-content{animation:none;opacity:1;transition:none}}.wc-body .step,.wc-body .chapter{background:none;border:none;box-shadow:none;padding:0}.course-parallel{margin-top:16px}.course-parallel .fam{font-family:var(--mono);font-size:48px;margin-top:0}.reading-familybar{justify-content:flex-start}.reading-familybar .fb-phys-sec{flex:0 1 auto;gap:14px}.reading-familybar .fb-story{justify-content:center}.reading-lesson-name{font-size:17px;font-weight:700;line-height:1.45;color:var(--ink);letter-spacing:-.1px;-webkit-line-clamp:2}.reading-concept svg{width:66px;height:44px;display:block;fill:none;stroke-linecap:round;stroke-linejoin:round}.reading-concept .concept-sheet{fill:#f8fffd;stroke:#bdece4;stroke-width:1.5}.reading-concept .concept-copy{stroke:var(--ink-3);stroke-width:2}.reading-concept .concept-evidence{stroke:var(--accent);stroke-width:4}.reading-concept .concept-locator{stroke:var(--accent-ink-soft);stroke-width:2;fill:#ffffffb8}.reading-concept .concept-step{stroke:var(--accent);stroke-width:2.2}.reading-concept .concept-result{fill:var(--accent-soft);stroke:#bdece4;stroke-width:1.5}.reading-concept .concept-conclusion{fill:#fff;stroke:var(--accent-ink-soft);stroke-width:1.7}.reading-concept .concept-dot{fill:var(--accent);stroke:none}.reading-lesson-stack{display:flex;flex-direction:column;gap:14px}.reading-toolbar{position:sticky;top:0;z-index:10;display:flex;flex-direction:column;gap:11px;padding:2px 2px 0;background:var(--paper)}.reading-toolbar-row{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:18px}.reading-toolbar-left{display:flex;align-items:center;gap:16px;min-width:0}.reading-nav-btn{width:max-content;min-width:96px;padding:9px 15px;border:1px solid var(--hairline);border-radius:12px;background:var(--surface);box-shadow:0 2px 7px #0f172a0a;color:var(--ink-2);font-size:13px;font-weight:600;transition:border-color .18s,color .18s,box-shadow .18s,background .18s}.reading-nav-btn:hover:not(:disabled){border-color:#bdece4;color:var(--accent-ink-soft);box-shadow:var(--shadow)}.reading-nav-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.reading-nav-btn:disabled{opacity:.38;cursor:default;box-shadow:none}.reading-nav-primary{justify-self:end;background:var(--accent);border-color:var(--accent);color:#fff}.reading-nav-primary:hover:not(:disabled){background:var(--accent-ink-soft);border-color:var(--accent-ink-soft);color:#fff}.reading-toolbar-row>.reading-nav-btn{justify-self:end}.reading-page-position{font-family:var(--mono);font-size:12px;font-weight:600;color:var(--ink-2);white-space:nowrap}.reading-toolbar-time{display:flex;align-items:baseline;justify-content:center;gap:6px;white-space:nowrap;font-variant-numeric:tabular-nums}.reading-toolbar-time strong{font-family:var(--mono);font-size:22px;line-height:1;color:var(--accent-ink-soft)}.reading-toolbar-time span{font-family:var(--mono);font-size:11px;color:var(--ink-3)}.reading-toolbar-track{height:4px;overflow:hidden;border-radius:999px;background:#e8e5dd}.reading-toolbar-track i{display:block;height:100%;border-radius:inherit;background:var(--accent);transition:width .25s ease}.reading-card-title{font-family:var(--serif);font-size:18px;line-height:1.45;font-weight:700;min-width:0}.reading-card .wc-body{display:flex;flex-direction:column;gap:26px;min-height:430px}.reading-method{padding:18px 20px;background:var(--accent-soft);border:1px solid #BDECE4;border-radius:14px}.reading-method h3{font-size:15px;color:var(--accent-ink-soft)}.reading-method ol{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px 24px;margin:12px 0 0 20px;color:var(--ink-2);font-size:13px;line-height:1.65}.reading-passage{display:flex;flex-direction:column;gap:18px}.reading-block{scroll-margin-top:28px;transition:background .2s,box-shadow .2s}.reading-paragraph{font-family:var(--serif);font-size:16.5px;line-height:1.9;color:var(--ink);padding:2px 4px;border-radius:10px}.reading-table-wrap{overflow-x:auto;border:1px solid var(--hairline);border-radius:14px;background:var(--lesson-card-soft,#F9FAFC)}.reading-table{width:100%;border-collapse:collapse;font-family:var(--serif);font-size:13.5px;line-height:1.55}.reading-table th{padding:12px 14px;text-align:left;background:var(--accent-soft);color:var(--accent-ink-soft);font-weight:700}.reading-table td{padding:12px 14px;border-top:1px solid var(--hairline);vertical-align:top}.reading-block.evidence-on,.reading-cloze.evidence-on,.reading-cloze>span.evidence-on{background:#fffbeb;box-shadow:0 0 0 2px #fde68a;animation:evidencePulse .7s ease-out}@keyframes evidencePulse{0%{box-shadow:0 0 0 8px #f59e0b3d}to{box-shadow:0 0 0 2px #fde68a}}.reading-cloze{font-family:var(--serif);font-size:18px;line-height:2.55;color:var(--ink);padding:20px 22px;background:var(--lesson-card-soft,#F9FAFC);border:1px solid var(--lesson-card-line,#E8EEF5);border-radius:16px;scroll-margin-top:28px}.reading-cloze>span{border-radius:7px;transition:background .2s,box-shadow .2s}.reading-gap{display:inline-flex;position:relative;vertical-align:middle;margin:0 4px}.reading-gap input{width:116px;border:0;border-bottom:2px solid var(--ink-3);background:#fff;border-radius:8px 8px 0 0;padding:5px 8px 3px;font-family:var(--mono);font-size:15px;text-align:center;color:var(--ink)}.reading-gap input:focus{outline:2px solid var(--accent);border-bottom-color:var(--accent)}.reading-gap input:disabled{background:transparent;color:var(--ink-2)}.reading-gap small{position:absolute;right:2px;top:-6px;font-family:var(--mono);font-size:8px;color:var(--ink-3)}.reading-questions{display:flex;flex-direction:column;gap:28px;border-top:1px solid var(--lesson-card-line,#E8EEF5);padding-top:24px}.reading-question h3{display:flex;gap:10px;font-family:var(--serif);font-size:16.5px;line-height:1.65;font-weight:650}.reading-question h3>span:first-child{width:24px;height:24px;border-radius:7px;background:var(--accent-soft);color:var(--accent-ink-soft);font-family:var(--mono);font-size:12px;display:flex;align-items:center;justify-content:center;flex:none}.reading-question .opts{margin-top:14px}.reading-question .opt{display:flex;align-items:flex-start;gap:12px;font-size:14px;line-height:1.55;padding:12px 16px}.reading-question .opt b{font-family:var(--mono);color:var(--accent-ink-soft)}.reading-question .opt:disabled{opacity:1;cursor:default}.reading-results{display:flex;flex-direction:column;gap:12px;border-top:1px solid var(--lesson-card-line,#E8EEF5);padding-top:24px}.reading-result{border-radius:16px;padding:18px 20px}.reading-result.ok{background:var(--ok-soft);border:1px solid #BBF7D0}.reading-result.err{background:var(--err-soft);border:1px solid #FECDD3}.reading-result-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:14px}.reading-result p{font-size:13.5px;line-height:1.7;margin-top:10px;color:var(--ink-2)}.reading-evidence-link{color:var(--accent);font-size:13px;font-weight:700;margin-top:10px}.reading-evidence-link:hover{text-decoration:underline}.reading-result blockquote{margin-top:9px;padding:10px 13px;border-left:3px solid var(--accent);background:#ffffffa8;font-family:var(--serif);font-size:12.5px;line-height:1.65;color:var(--ink-2)}.reading-summary-page{position:relative;isolation:isolate}.reading-summary-page:before{content:"";position:absolute;inset:0 auto 0 0;width:5px;background:linear-gradient(180deg,var(--accent),#5EEAD4);z-index:1}.reading-summary-page .wc-body{min-height:auto;padding:38px 42px 42px;background:radial-gradient(circle at 100% 0,rgba(204,251,241,.5),transparent 34%),linear-gradient(135deg,#fff,#fbfffe)}.reading-summary{display:flex;flex-direction:column;gap:22px}.reading-summary-heading{display:flex;align-items:center;gap:10px}.reading-summary-heading i{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 5px #0d94881a}.reading-summary-heading .pane-label{margin:0;color:var(--accent-ink-soft);font-size:11px;letter-spacing:2px}.reading-summary-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(168px,auto);align-items:center;gap:24px}.reading-summary-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));overflow:hidden;border:1px solid var(--lesson-card-line,#E8EEF5);border-radius:18px;background:#ffffffd1;box-shadow:0 12px 28px #0f172a0d}.reading-summary-stats>div{position:relative;display:flex;min-height:132px;flex-direction:column;justify-content:center;padding:24px clamp(18px,2vw,30px)}.reading-summary-stats>div+div:before{content:"";position:absolute;left:0;top:25%;bottom:25%;width:1px;background:var(--lesson-card-line,#E8EEF5)}.reading-summary-stats b{font-family:var(--serif);font-size:42px;line-height:1.1;letter-spacing:-1px;color:var(--ink);font-variant-numeric:tabular-nums}.reading-summary-stats span{margin-top:9px;font-size:13px;font-weight:600;letter-spacing:.3px;color:var(--ink-3)}.reading-summary-action{display:flex;align-items:center;justify-content:center}.reading-summary-action .reading-review-btn{width:168px;min-width:0;padding:11px 14px}.reading-progress-card{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:24px 28px;margin:4px 0 28px}.reading-progress-card h2{font-size:19px;margin-top:10px}.reading-progress-card p{font-size:13px;color:var(--ink-2);margin-top:7px}.reading-progress-score{display:flex;align-items:center;gap:12px}.reading-progress-score>b{font-family:var(--serif);font-size:30px}.reading-progress-score>span{font-size:12px;color:var(--ink-3)}.progress-section-title{font-size:17px;margin-top:28px}@media(max-width:1100px){#chatcol{width:380px}#chatcol .chatbody{min-width:350px}.reading-method ol{grid-template-columns:1fr}}@media(max-width:820px){#page-class{position:relative}#chatcol{display:none}#cardscroll{padding:18px 16px 64px}.reading-summary-page .wc-body{padding:28px 24px 30px}.reading-summary-row,.reading-summary-stats{grid-template-columns:1fr}.reading-summary-stats>div{min-height:104px;padding:20px 24px}.reading-summary-stats>div+div:before{inset:0 24px auto;height:1px;width:auto}.reading-summary-action{justify-content:flex-end}.reading-card .wc-body{padding:22px 20px}.fb-phys-sec,.fb-sep{display:none}.reading-familybar .fb-phys-sec{display:flex}.reading-concept svg{width:58px;height:38px}.reading-toolbar-row{grid-template-columns:minmax(0,1fr) auto;gap:12px}.reading-toolbar-left{gap:10px}.reading-toolbar-time{grid-column:1 / -1;grid-row:2}.reading-nav-btn{min-width:88px;padding:8px 12px}.reading-toolbar-time strong{font-size:19px}}.interactive-course-title{display:flex;min-width:0;flex-direction:column;gap:3px}.interactive-course-title b{overflow:hidden;font-size:16px;text-overflow:ellipsis;white-space:nowrap}.interactive-course-title span{font-size:12px;color:var(--ink-3)}.interactive-lesson-switcher{display:flex;flex:0 0 auto;align-items:center;gap:8px;margin-left:auto}.interactive-lesson-switcher .reading-nav-btn{min-width:112px;background:var(--surface)}.interactive-reading-page{position:relative}.interactive-content-column{flex:1;min-width:0;overflow-y:auto;padding:22px 28px 72px}.interactive-reading-toolbar{max-width:920px;margin:0 auto 14px;padding:2px 2px 0}.interactive-content-card{max-width:920px;margin:0 auto}.interactive-content-card .wc-head{display:flex;justify-content:space-between;gap:16px}.reading-actual-time{font-family:var(--mono);font-size:12px;color:var(--ink-3)}.reading-cloze-static{line-height:2.6}.reading-static-gap{display:inline-block;margin:0 4px;padding:0 5px;color:var(--accent-ink-soft);font-family:var(--mono);font-weight:700}.reading-static-gap sup{font-size:8px;color:var(--ink-3)}.reading-cloze-inline{line-height:3.05}.reading-inline-gap{position:relative;display:inline-flex;align-items:baseline;margin:0 5px;padding:0 5px 2px;border-radius:8px;color:var(--accent-ink-soft);font-family:var(--mono);font-weight:700;transition:color .18s,background .18s,box-shadow .18s}.reading-inline-gap sup{align-self:flex-start;margin:3px 4px 0 0;font-size:8px;line-height:1;color:var(--ink-3)}.reading-inline-stem{letter-spacing:.2px}.reading-inline-gap input{min-width:3.2ch;height:28px;margin:0;padding:1px 2px 0;border:0;border-bottom:2px solid #249C8D;border-radius:0;background:transparent;color:inherit;font:inherit;line-height:1;outline:0;box-shadow:none}.reading-inline-gap input:focus{border-bottom-color:#0f766e;box-shadow:0 3px 0 -1px #0f766e29}.reading-inline-gap input:disabled{cursor:default;opacity:1;-webkit-text-fill-color:currentColor}.reading-inline-gap.wrong{background:#fff1f2;color:#be123c;box-shadow:inset 0 0 0 1px #fecdd3}.reading-inline-gap.wrong input{border-bottom-color:#e11d48}.reading-inline-gap.correct{background:#f0fdf4;color:#15803d;box-shadow:inset 0 0 0 1px #bbf7d0}.reading-inline-gap.correct input{border-bottom-color:#22c55e}.reading-inline-gap.corrected{background:#ecfdf9;color:#0f766e;box-shadow:inset 0 0 0 1px #99f6e4}.reading-inline-gap.corrected input{border-bottom-color:#14b8a6}.reading-inline-status{align-self:center;margin-left:5px;padding:1px 5px;border-radius:999px;background:#ffffffb8;font-family:var(--sans);font-size:8px;font-weight:800;line-height:1.55;white-space:nowrap}.reading-cloze-actions{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-top:16px;padding:13px 4px 0}.reading-cloze-actions p{max-width:560px;font-size:12px;line-height:1.65;color:var(--ink-3)}.reading-cloze-submit{flex:0 0 auto;min-width:126px}.reading-cloze-submit:disabled{cursor:not-allowed;opacity:.5}.interactive-reading-complete{display:block;margin:18px auto 0;min-width:140px}.interactive-return-answer,.interactive-mobile-tabs{display:none}.interactive-teacher-column .chatbody{min-width:0}.interactive-teacher-column .chathead{justify-content:space-between}.interactive-teacher-column .chathead>div{display:flex;flex-direction:column;gap:3px}.interactive-teacher-column .chathead span{max-width:330px;font-size:11px;color:var(--ink-3);font-weight:400}.interactive-teacher-column .chathead>button{color:var(--accent);font-size:12px}.interactive-question-card{margin:6px 0 16px;padding:18px;border:1px solid #BDECE4;border-radius:16px;background:var(--accent-soft)}.interactive-question-label{font-family:var(--mono);font-size:11px;font-weight:700;color:var(--accent-ink-soft);margin-bottom:9px}.interactive-question-card h3,.interactive-question-card p{font-size:14px;line-height:1.65}.interactive-options{display:flex;flex-direction:column;gap:8px;margin-top:13px}.interactive-options button{display:flex;align-items:flex-start;gap:10px;width:100%;padding:10px 12px;border:1px solid var(--hairline);border-radius:11px;background:#fff;text-align:left;font-size:13px;line-height:1.5}.interactive-options button b{font-family:var(--mono);color:var(--accent-ink-soft)}.interactive-options button.selected{border-color:var(--accent);box-shadow:0 0 0 2px #0d94881f}.interactive-options button:disabled{opacity:.58}.interactive-question-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px}.interactive-hint-btn{display:inline-flex;align-items:center;justify-content:center;min-height:34px;padding:7px 13px;border:1px solid #72D7C8;border-radius:10px;background:#fff;color:var(--accent-ink-soft);box-shadow:0 2px 7px #0d948817;font-size:12px;font-weight:700;cursor:pointer;transition:background .18s,border-color .18s,box-shadow .18s,transform .18s}.interactive-hint-btn:hover:not(:disabled){border-color:var(--accent);background:#f0fdfa;box-shadow:0 4px 11px #0d948826;transform:translateY(-1px)}.interactive-hint-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.interactive-hint-btn:active:not(:disabled){box-shadow:0 1px 3px #0d94881f;transform:translateY(0)}.interactive-hint-btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none}.interactive-question-submit{min-width:96px;padding:9px 16px}.interactive-question-submit:disabled{cursor:not-allowed;opacity:.48}.interactive-choice-batch{align-self:stretch;margin:6px 0 16px;padding:18px;border:1px solid #BDECE4;border-radius:18px;background:linear-gradient(180deg,#f0fdfa,#f8fffd);box-shadow:0 10px 24px #0f766e14;white-space:normal}.interactive-choice-batch-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.interactive-choice-batch-head>div{display:flex;flex-direction:column;gap:2px}.interactive-choice-batch-head small{font-size:10px;font-weight:800;letter-spacing:.75px;color:var(--accent-ink-soft)}.interactive-choice-batch-head strong{font-family:var(--mono);font-size:15px;color:var(--ink)}.interactive-choice-save{max-width:170px;font-size:10px;line-height:1.45;color:var(--ink-3);text-align:right}.interactive-choice-save.failed{color:var(--danger);font-weight:700}.interactive-choice-stepper{display:flex;flex-wrap:wrap;align-items:center;gap:7px;margin:15px 0 16px}.interactive-choice-stepper button{position:relative;display:inline-flex;width:38px;height:38px;align-items:center;justify-content:center;border:1px solid var(--hairline);border-radius:10px;background:#fff;color:var(--ink-3);font-family:var(--mono);font-size:11px;font-weight:800;transition:border-color .16s,background .16s,color .16s,box-shadow .16s}.interactive-choice-stepper button.current{border-color:var(--accent);color:var(--accent-ink-soft);box-shadow:0 0 0 2px #0d94881f}.interactive-choice-stepper button.answered{background:#ecfdf9;color:#0f766e}.interactive-choice-stepper button i{position:absolute;top:-5px;right:-5px;display:flex;width:14px;height:14px;align-items:center;justify-content:center;border-radius:50%;background:var(--accent);color:#fff;font-size:8px;font-style:normal}.interactive-choice-question-label{margin-bottom:9px;color:var(--accent-ink-soft);font-family:var(--mono);font-size:11px;font-weight:700}.interactive-choice-question-title{font-size:15px;line-height:1.65;outline:0}.interactive-choice-question-title:focus-visible{border-radius:5px;box-shadow:0 0 0 2px #0d948833}.interactive-choice-options button{min-height:45px}.interactive-choice-help{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:13px}.interactive-choice-help>span{font-size:10px;line-height:1.5;color:var(--ink-3);text-align:right}.interactive-choice-navigation{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:15px;padding-top:14px;border-top:1px solid #D8EFEA}.interactive-choice-navigation .btn{min-width:96px}.interactive-composer-shell{border-top:1px solid var(--hairline);padding-top:10px}.interactive-advance-row{display:flex;align-items:center;justify-content:flex-start;padding:0 18px 4px}.interactive-feedback-advance{display:flex;align-items:center;justify-content:flex-start;padding:0 0 2px}.interactive-input-state{padding:2px 18px 0;font-size:11px;color:var(--ink-3)}.interactive-composer{align-items:center;padding-top:8px}.interactive-composer input{min-width:0;height:42px}.interactive-advance{flex:0 0 auto;min-width:72px;height:34px;margin:0;padding:6px 14px;border:1px solid #8BD8CC;border-radius:999px;background:#fff;color:var(--accent-ink-soft);box-shadow:0 1px 3px #0f766e14;font-size:12px;font-weight:700;white-space:nowrap;transition:background .18s,border-color .18s,color .18s,box-shadow .18s,transform .18s}.interactive-advance:hover:not(:disabled){border-color:var(--accent);background:#f0fdfa;box-shadow:0 3px 8px #0f766e1f;transform:translateY(-1px)}.interactive-advance:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.interactive-advance:active:not(:disabled){background:var(--accent-soft);box-shadow:0 1px 2px #0f766e14;transform:translateY(0) scale(.98)}.interactive-advance:disabled{border-color:var(--hairline);background:var(--surface-dim);color:var(--ink-3);box-shadow:none}.interactive-composer-send{flex:0 0 auto;min-width:76px;min-height:42px;padding:9px 20px;box-shadow:0 5px 12px #0d948833}.interactive-composer-send:hover:not(:disabled){box-shadow:0 7px 16px #0d948840;transform:translateY(-1px)}.interactive-composer-send:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.interactive-composer-send:active:not(:disabled){box-shadow:0 2px 6px #0d948829;transform:scale(.98)}.interactive-composer-send:disabled{box-shadow:none}.interactive-auto-advance{margin:8px 18px 0;color:var(--accent-ink-soft);font-size:12px;font-weight:700;text-align:right}.interactive-error{margin:8px 18px 0}.interactive-evidence{margin-top:9px}.interactive-evidence button{font-size:12px;font-weight:700;color:var(--accent)}.interactive-evidence blockquote{margin-top:7px;padding-left:10px;border-left:2px solid var(--accent);font-size:12px;line-height:1.55;color:var(--ink-2)}.interactive-cloze-result{align-self:stretch;overflow:hidden;margin:4px 0 14px;border:1px solid #B8DDD7;border-radius:18px;background:#fff;box-shadow:0 10px 26px #0f766e1a;white-space:normal}.interactive-cloze-result>header{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:16px 17px;background:#f0fdfa;border-bottom:1px solid #CCFBF1}.interactive-cloze-result>header>div{display:flex;flex-direction:column;gap:2px}.interactive-cloze-result>header small{font-size:10px;font-weight:800;letter-spacing:.7px;color:#0f766e}.interactive-cloze-result>header strong{font-family:var(--mono);font-size:19px;line-height:1.3;color:var(--ink)}.interactive-cloze-result>header>span{padding:4px 8px;border-radius:999px;background:#fff;font-size:10px;font-weight:800;color:var(--accent-ink-soft);white-space:nowrap}.interactive-cloze-result-summary{padding:13px 17px 11px;font-size:12px;line-height:1.65;color:var(--ink-2)}.interactive-cloze-result-summary b{color:var(--ink)}.interactive-cloze-errors{display:flex;flex-direction:column;gap:9px;padding:0 13px 14px;list-style:none;counter-reset:none}.interactive-cloze-errors li{padding:11px 12px;border:1px solid #FECDD3;border-radius:12px;background:#fff8f8}.interactive-cloze-errors li.corrected{border-color:#a7f3d0;background:#f3fffa}.interactive-cloze-error-head{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:8px}.interactive-cloze-error-head>span{font-size:10px;font-weight:800;color:var(--ink-3)}.interactive-cloze-error-head>b{overflow:hidden;font-size:12px;color:#be123c;text-overflow:ellipsis;white-space:nowrap}.interactive-cloze-errors li.corrected .interactive-cloze-error-head>b{color:#0f766e}.interactive-cloze-error-head b i{padding:0 2px;color:var(--ink-3);font-style:normal}.interactive-cloze-error-head>em{padding:2px 6px;border-radius:999px;background:#ffe4e6;color:#be123c;font-size:9px;font-style:normal;font-weight:800;white-space:nowrap}.interactive-cloze-errors li.corrected .interactive-cloze-error-head>em{background:#d1fae5;color:#047857}.interactive-cloze-errors li>p{margin:7px 0 0;font-size:11px;line-height:1.6;color:var(--ink-2)}.interactive-cloze-errors li>button{margin-top:7px;font-size:10px;font-weight:800;color:var(--accent)}.interactive-cloze-all-correct{padding:16px 17px;font-size:13px;line-height:1.65;color:#166534}.interactive-cloze-result>footer{padding:10px 17px;border-top:1px solid var(--hairline);background:var(--surface-dim);font-size:10px;line-height:1.55;color:var(--ink-3)}.interactive-choice-result{align-self:stretch;overflow:hidden;margin:4px 0 14px;border:1px solid #B8DDD7;border-radius:18px;background:#fff;box-shadow:0 10px 26px #0f766e1a;white-space:normal}.interactive-choice-result>header{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:16px 17px;background:#f0fdfa;border-bottom:1px solid #CCFBF1}.interactive-choice-result>header>div{display:flex;flex-direction:column;gap:2px}.interactive-choice-result>header small{font-size:10px;font-weight:800;letter-spacing:.7px;color:#0f766e}.interactive-choice-result>header strong{font-family:var(--mono);font-size:19px;line-height:1.3;color:var(--ink)}.interactive-choice-result>header>span{padding:4px 8px;border-radius:999px;background:#fff;font-size:10px;font-weight:800;color:var(--accent-ink-soft);white-space:nowrap}.interactive-choice-result-summary{padding:13px 17px;font-size:11px;line-height:1.65;color:var(--ink-2)}.interactive-unit-summary{position:relative;align-self:stretch;width:100%;overflow:hidden;border:1px solid #99DDD3;border-radius:18px;background:var(--surface);box-shadow:0 12px 28px #0f766e1f;white-space:normal}.interactive-unit-summary:before{content:"";position:absolute;inset:0 0 auto;height:3px;background:var(--accent)}.interactive-unit-summary-head{display:grid;grid-template-columns:38px minmax(0,1fr) auto;align-items:center;gap:11px;padding:17px 17px 14px;background:linear-gradient(135deg,#ecfdf9,#f8fffd 58%,#fff)}.interactive-unit-summary-icon{width:38px;height:38px;display:flex;align-items:center;justify-content:center;border-radius:12px;background:var(--accent);color:#fff;box-shadow:0 7px 14px #0d948833}.interactive-unit-summary-icon svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.interactive-unit-summary-title{display:flex;min-width:0;flex-direction:column;gap:1px}.interactive-unit-summary-title small{font-size:11px;font-weight:700;line-height:1.4;letter-spacing:.8px;color:var(--accent-ink-soft)}.interactive-unit-summary-title strong{font-size:15px;line-height:1.45;color:var(--ink)}.interactive-unit-summary-score{display:flex;align-items:baseline;gap:5px;color:var(--accent-ink-soft);font-variant-numeric:tabular-nums}.interactive-unit-summary-score>span{font-family:var(--mono);font-size:14px;font-weight:700}.interactive-unit-summary-score b{font-size:26px;line-height:1}.interactive-unit-summary-score small{font-size:10px;font-weight:700;color:var(--ink-3)}.interactive-unit-summary-progress{height:4px;margin:0 17px;overflow:hidden;border-radius:999px;background:#ddeeeb}.interactive-unit-summary-progress span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--accent),#2DD4BF);transition:width .35s ease-out}.interactive-unit-summary-details{display:flex;align-items:center;gap:16px;padding:13px 17px 15px}.interactive-unit-summary-details>div{display:flex;min-width:max-content;flex-direction:column;gap:1px}.interactive-unit-summary-details>div.primary{min-width:0;flex:1}.interactive-unit-summary-details dt{font-size:10px;line-height:1.4;color:var(--ink-3)}.interactive-unit-summary-details dd{overflow:hidden;font-size:12px;font-weight:700;line-height:1.5;color:var(--ink);text-overflow:ellipsis;white-space:nowrap}.interactive-unit-summary-details>div+div{padding-left:16px;border-left:1px solid var(--hairline)}.interactive-unit-summary-fallback{padding:0 17px 16px;font-size:13px;line-height:1.65;color:var(--ink-2)}.interactive-summary-card{padding:20px;border-radius:16px;background:var(--ok-soft);border:1px solid #BBF7D0}.interactive-summary-card h3{margin-bottom:8px}.interactive-summary-card p{font-size:13px;line-height:1.7}.interactive-summary-card>.btn{margin-top:12px}.interactive-review-status{margin-top:12px;padding:11px 12px;border-radius:10px;background:#fff;font-size:12px;line-height:1.6;color:var(--accent-ink-soft);font-weight:700}.interactive-review-status.failed{color:var(--danger)}.interactive-model-pending{margin:8px 4px;color:var(--ink-3);font-size:11px}.interactive-response-message{margin:8px 18px 0;padding:9px 11px;border-radius:10px;background:var(--accent-soft);color:var(--accent-ink-soft);font-size:12px;line-height:1.5}.interactive-late-comments{margin:8px 0 14px;padding:10px 12px;border:1px solid var(--hairline);border-radius:12px;background:var(--surface-dim)}.interactive-late-comments>summary{cursor:pointer;color:var(--ink-3);font-size:12px;font-weight:700}.interactive-late-comments[open]>summary{margin-bottom:10px}@media(max-width:820px){#topbar.inclass.reading-topbar{padding:0 14px}.interactive-lesson-switcher{gap:6px}.interactive-lesson-switcher .reading-nav-btn{min-width:82px;padding:8px 9px;font-size:12px}.interactive-reading-page{display:block;padding-top:44px}.interactive-mobile-tabs{position:absolute;z-index:20;top:0;left:0;right:0;height:44px;display:grid;grid-template-columns:1fr 1fr;background:var(--surface);border-bottom:1px solid var(--hairline)}.interactive-mobile-tabs button{font-size:13px;font-weight:700;color:var(--ink-3)}.interactive-mobile-tabs button[aria-selected=true]{color:var(--accent-ink-soft);box-shadow:inset 0 -2px var(--accent)}.interactive-content-column{display:none;height:100%;padding:16px 14px 76px}.interactive-content-column.mobile-active{display:block}.interactive-reading-toolbar .reading-page-position{font-size:11px}.interactive-reading-page #chatcol{display:none;width:100%;height:100%;border-left:0}.interactive-reading-page #chatcol.mobile-active{display:flex}.interactive-reading-page #chatcol .chatbody{min-width:0;width:100%}.interactive-return-answer{position:fixed;right:16px;bottom:18px;z-index:30;display:block;padding:10px 15px;border-radius:999px;background:var(--accent);color:#fff;font-size:13px;font-weight:700;box-shadow:var(--shadow)}.interactive-teacher-column .chathead>button{display:inline}.interactive-choice-batch{margin-bottom:12px;padding:15px;border-radius:15px}.interactive-choice-stepper button{width:44px;height:44px}.interactive-choice-help{align-items:flex-start;flex-direction:column}.interactive-choice-help>span{text-align:left}.interactive-choice-navigation .btn{min-height:44px}.reading-cloze-actions{align-items:stretch;flex-direction:column}.reading-cloze-submit{width:100%}.interactive-cloze-error-head{grid-template-columns:auto minmax(0,1fr)}.interactive-cloze-error-head>em{grid-column:2;justify-self:start}}