:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-synthesis:none;--ink:#1d1d1f;--muted:#68686e;--soft:#737379;--blue:#06c;--background:#f5f5f7;--surface:#fff;--surface-soft:#f5f5f7;--navigation:#fdfdfe;--line:#e5e5e9;--control-line:#d2d2d7;--selection:#edf4ff;--success:#267447;--warning:#865516;--danger:#b5322a;--shadow:0 4px 22px #191f3009, 0 1px 3px #191f3005;--radius:24px;font-family:-apple-system,BlinkMacSystemFont,SF Pro Display,SF Pro Text,PingFang SC,Microsoft YaHei,sans-serif}*{box-sizing:border-box}html{min-height:100%;scroll-padding-top:120px}body{min-height:100dvh;color:var(--ink);background:var(--background);-webkit-font-smoothing:antialiased;margin:0}body:before{content:"";pointer-events:none;z-index:-1;background:radial-gradient(65% 42% at 88% 0,#d7e1fc70,#0000 85%),radial-gradient(44% 30% at 2% 35%,#e0ebfd40,#0000 85%);position:fixed;inset:0}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer;touch-action:manipulation}button:disabled{cursor:not-allowed;opacity:.48;transform:none!important}:is(a,button,input,select,textarea,summary):focus-visible{outline:3px solid var(--blue);outline-offset:4px}a{color:var(--blue);text-underline-offset:4px}.icon{vertical-align:middle;flex-shrink:0;display:inline-block}.shell{max-width:1184px;margin-inline:auto;padding:0 32px 48px}.glass,.study{background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow)}.topbar{z-index:20;border:1px solid var(--line);background:var(--navigation);border-radius:23px;justify-content:space-between;align-items:center;gap:20px;min-height:76px;margin-top:24px;padding:12px 20px;display:flex;position:sticky;top:18px;box-shadow:0 6px 24px #191f300a,inset 0 1px #fff9}.brand{color:var(--ink);letter-spacing:-.035em;white-space:nowrap;align-items:center;gap:11px;font-size:21px;font-weight:750;text-decoration:none;display:flex}.mark{color:#fff;background:linear-gradient(155deg,#248aec,#0062ce);border-radius:13px;flex-shrink:0;place-items:center;width:40px;height:40px;display:grid;box-shadow:inset 0 1px #ffffff47,0 4px 9px #0066cc21}.mark .icon{width:23px;height:23px}.brand-detail{border-left:1px solid var(--line);letter-spacing:0;color:var(--muted);margin-left:11px;padding-left:11px;font-size:12px;font-weight:500;display:inline-block}.app-topbar nav{align-items:center;gap:4px;display:flex}.app-topbar nav a{min-height:44px;color:var(--muted);border-radius:13px;justify-content:center;align-items:center;gap:7px;padding:10px 13px;font-size:13px;font-weight:550;text-decoration:none;transition:background .16s,color .16s;display:flex}.app-topbar nav a:hover{color:var(--ink);background:var(--surface-soft)}.app-topbar nav a[aria-current=page]{background:var(--selection);color:var(--blue)}.app-topbar nav .icon{width:18px;height:18px}.account-menu{align-items:center;gap:9px;min-width:0;display:flex}.account-avatar{width:32px;height:32px;color:var(--blue);background:var(--selection);border-radius:50%;flex-shrink:0;place-items:center;font-size:13px;font-weight:650;display:grid}.account-name{text-overflow:ellipsis;white-space:nowrap;max-width:84px;font-size:12px;overflow:hidden}.account-menu .logout-button{width:44px;min-height:44px;color:var(--muted);background:0 0;border:0;padding:10px}.skip-link{background:var(--surface);color:var(--blue);z-index:100;border-radius:12px;padding:14px 18px;position:absolute;top:-120px;left:18px}.skip-link:focus{top:12px}.intro{padding:47px 2px 28px}.eyebrow{color:var(--muted);letter-spacing:.1em;align-items:center;gap:9px;font-size:11px;font-weight:600;line-height:1.7;display:inline-flex}.eyebrow-dot{background:var(--blue);border-radius:50%;width:7px;height:7px}.intro h1{letter-spacing:-.05em;overflow-wrap:anywhere;margin:12px 0;font-size:clamp(29px,3.7vw,42px);font-weight:720;line-height:1.28}.title-dot{color:var(--blue)}.intro p{max-width:720px;color:var(--muted);margin:0;font-size:14px;line-height:1.8}.home-intro{justify-content:space-between;align-items:center;gap:24px;display:flex}.home-intro .eyebrow{letter-spacing:.02em;font-size:12px}.hero-start{flex-shrink:0;justify-items:end;gap:10px;display:grid}.hero-start>span{color:var(--muted);font-size:11px}.stats{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:4px 0 24px;display:grid}.stat{border-radius:20px;flex-direction:column;gap:17px;min-height:160px;padding:22px 25px;display:flex}.stat-label{color:var(--muted);align-items:center;gap:10px;font-size:13px;font-weight:550;display:flex}.stat-icon{border-radius:9px;flex-shrink:0;place-items:center;width:30px;height:30px;display:inline-grid}.stat-icon .icon{width:17px;height:17px}.stat strong{letter-spacing:-.045em;font-variant-numeric:tabular-nums;font-size:34px;font-weight:700;line-height:1}.stat small{color:var(--muted);letter-spacing:0;margin-left:7px;font-size:12px;font-weight:500}.stat-note{color:var(--muted);font-size:11px;line-height:1.5}.blue{color:#06c;background:#eaf2ff}.purple{color:#7546af;background:#f0eafa}.green{color:#267447;background:#eaf5ed}.amber{color:#865516;background:#fbf2e4}.study-layout{grid-template-columns:minmax(0,1fr) 276px;align-items:start;gap:22px;display:grid}.study{border-radius:var(--radius);min-width:0;min-height:420px;overflow:hidden}.empty,.question{padding:30px 32px 32px}.step{color:var(--blue);align-items:center;gap:9px;font-size:12px;font-weight:600;display:inline-flex}.step-index{background:var(--selection);border-radius:8px;place-items:center;min-width:27px;height:27px;font-size:11px;display:grid}.empty h2{letter-spacing:-.04em;margin:18px 0 10px;font-size:clamp(23px,3vw,27px);font-weight:650}.empty p{color:var(--muted);margin:0 0 22px;font-size:14px;line-height:1.8}.study-aside{gap:18px;display:grid}.study-aside .panel,.dimension-panel{border-radius:20px;margin:0;padding:23px}.aside-heading{align-items:center;gap:10px;margin-bottom:20px;display:flex}.aside-heading h2{margin:0;font-size:14px;font-weight:650}.budget-number{align-items:baseline;gap:8px;margin:6px 0 18px;display:flex}.budget-number strong{letter-spacing:-.04em;font-variant-numeric:tabular-nums;font-size:36px;font-weight:680}.budget-number span{color:var(--muted);font-size:12px}.budget-panel progress{background:var(--surface-soft);width:100%;height:6px;accent-color:var(--blue);border:0;border-radius:4px;display:block;overflow:hidden}.budget-panel progress::-webkit-progress-bar{background:var(--surface-soft);border-radius:4px}.budget-panel progress::-webkit-progress-value{background:var(--blue);border-radius:4px}.budget-panel progress::-moz-progress-bar{background:var(--blue);border-radius:4px}.text-link{align-items:center;gap:7px;min-height:44px;margin-top:9px;font-size:12px;font-weight:550;text-decoration:none;display:inline-flex}.text-link .icon{width:15px;height:15px}.dimension-list{gap:0;display:grid}.dimension-list>div{border-top:1px solid var(--line);gap:7px;padding:13px 0;font-size:12px;display:grid}.dimension-list>div:first-child{border-top:0;padding-top:0}.dimension-list strong{font-weight:550}.dimension-list span{color:var(--muted);font-size:11px}.explore{margin-top:34px}.section-heading{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:16px;display:flex}.section-heading h2{letter-spacing:-.02em;margin:0;font-size:18px;font-weight:650}.section-heading>span{color:var(--muted);font-size:12px}.learning-links{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;display:grid}.learning-link{border:1px solid var(--line);background:var(--surface);min-width:0;color:var(--ink);border-radius:18px;align-items:center;gap:13px;padding:21px 18px;text-decoration:none;transition:border-color .16s,box-shadow .16s;display:flex}.learning-link:hover{border-color:var(--control-line);box-shadow:var(--shadow)}.learning-link>.icon{color:var(--muted);width:16px;height:16px;margin-left:auto}.feature-icon{border-radius:13px;flex-shrink:0;place-items:center;width:42px;height:42px;display:inline-grid}.feature-icon .icon{width:21px;height:21px}.learning-link h3{margin:0 0 6px;font-size:14px;font-weight:600}.learning-link p{color:var(--muted);margin:0;font-size:11px;line-height:1.5}footer{color:var(--muted);text-align:center;padding:35px 0 0;font-size:11px;line-height:1.8}.primary,.quiet{border-radius:13px;justify-content:center;align-items:center;gap:10px;min-height:46px;padding:12px 19px;font-size:14px;font-weight:550;line-height:1.4;text-decoration:none;transition:background .16s,transform .16s;display:inline-flex}.primary{color:#fff;background:linear-gradient(#0071e3,#0064cd);border:1px solid #0048a126;box-shadow:0 3px 8px #0066cc21,inset 0 1px #ffffff21}.primary:hover:not(:disabled){background:#0064cd}.primary:active:not(:disabled){transform:scale(.985)}.primary .icon{width:17px;height:17px}.quiet{color:var(--ink);background:var(--surface-soft);border:1px solid var(--line);box-shadow:none}.quiet:hover:not(:disabled){background:var(--selection)}.actions{flex-wrap:wrap;align-items:center;gap:12px;margin-top:20px;display:flex}fieldset{border:0;min-width:0;margin:0;padding:0}legend{margin-bottom:12px;padding:0;font-size:13px;font-weight:650}.legend-note{color:var(--muted);margin-left:9px;font-size:11px;font-weight:400}.settings{gap:24px;margin:23px 0 26px;display:grid}.segments{flex-wrap:wrap;gap:5px;display:flex}.segments button{border:1px solid var(--line);background:var(--surface-soft);min-height:44px;color:var(--muted);border-radius:11px;justify-content:center;align-items:center;gap:7px;padding:11px 16px;font-size:13px;transition:background .16s,color .16s;display:inline-flex}.segments button:hover:not(:disabled){color:var(--ink)}.segments button[aria-pressed=true]{border-color:var(--blue);background:var(--selection);color:var(--blue);font-weight:600}.settings .segments{background:var(--surface-soft);border-radius:13px;width:fit-content;max-width:100%;padding:4px}.settings .segments button{background:0 0;border:0;min-height:42px;padding:10px 19px}.settings .segments button[aria-pressed=true]{background:var(--surface);box-shadow:0 1px 4px #0000001a}.setting-note,.rating-instruction{color:var(--muted);margin:10px 0 0!important;font-size:12px!important;line-height:1.75!important}.type-options{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.type-options label{border:1px solid var(--line);min-width:0;min-height:48px;color:var(--muted);cursor:pointer;border-radius:12px;align-items:center;gap:9px;padding:11px 13px;font-size:12px;display:flex}.type-options label:has(input:checked){border-color:var(--blue);background:var(--selection);color:var(--blue)}.type-options label:has(input:disabled){color:var(--soft);background:var(--surface-soft);cursor:not-allowed}.type-options input,.check-label input{height:17px;min-height:0;box-shadow:none;accent-color:var(--blue);flex-shrink:0;margin:0;padding:0;width:17px!important}.limit-options{flex-wrap:wrap;gap:16px;display:flex}.limit-options label{color:var(--muted);flex:1;gap:8px;min-width:150px;font-size:12px;display:grid}input,select,textarea{background:var(--surface);border:1px solid var(--control-line);min-width:0;min-height:48px;color:var(--ink);border-radius:12px;padding:12px 14px;font-size:16px;line-height:1.5}input{width:100%}input::placeholder,textarea::placeholder{color:var(--soft);opacity:1}select{max-width:100%;padding-right:28px}textarea{resize:vertical;width:100%}input:disabled,select:disabled,textarea:disabled{color:var(--muted);background:var(--surface-soft)}input[type=file]{padding:10px;font-size:13px}input[type=file]::file-selector-button{background:var(--surface-soft);color:var(--ink);cursor:pointer;border:0;border-radius:8px;margin-right:12px;padding:8px 12px}.question form>label{margin-bottom:8px;font-size:13px;font-weight:550;display:block}.question-top{color:var(--muted);font-variant-numeric:tabular-nums;justify-content:space-between;align-items:center;gap:16px;font-size:12px;display:flex}.question-top .step{background:var(--selection);border-radius:8px;padding:7px 10px}.meter{background:var(--surface-soft);border-radius:4px;height:5px;margin:18px 0 25px;overflow:hidden}.meter>span{background:var(--blue);border-radius:inherit;height:100%;transition:width .25s;display:block}.instruction{color:var(--muted);margin:0 0 20px;font-size:13px;line-height:1.8}.prompt{letter-spacing:-.04em;overflow-wrap:anywhere;margin:0 0 28px;font-size:clamp(32px,4.5vw,46px);font-weight:650;line-height:1.3}.prompt.chinese{letter-spacing:-.02em;font-size:clamp(25px,3.4vw,32px);line-height:1.55}.choices{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.choices button{border:1px solid var(--line);min-width:0;min-height:64px;color:var(--ink);background:var(--surface);text-align:left;overflow-wrap:anywhere;border-radius:13px;align-items:center;gap:12px;padding:15px;font-size:14px;line-height:1.7;display:flex}.choices button:hover:not(:disabled){background:var(--selection);border-color:var(--blue)}.choices span{background:var(--surface-soft);width:27px;height:27px;color:var(--muted);border-radius:8px;flex-shrink:0;place-items:center;font-size:12px;display:grid}.review-panel{margin-top:14px}.result-title{margin:0;font-size:19px;line-height:1.6}.result-title.correct{color:var(--success)}.result-title.wrong{color:var(--danger)}.answer-comparison{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:18px 0;display:grid}.answer-comparison>div{background:var(--surface-soft);border-radius:13px;min-width:0;padding:16px}.answer-comparison dt{color:var(--muted);margin-bottom:8px;font-size:12px}.answer-comparison dd{overflow-wrap:anywhere;margin:0;font-size:18px;font-weight:600;line-height:1.6}.example{color:var(--muted);font-size:14px;line-height:1.8}.pronunciation{margin-bottom:10px}.resolution{padding-block:14px}.rating-buttons{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin-top:16px;display:grid}.rating{border:1px solid var(--line);min-height:93px;color:var(--ink);background:var(--surface);border-radius:13px;flex-direction:column;justify-content:center;align-items:center;gap:7px;padding:14px 5px;display:flex}.rating:hover:not(:disabled){background:var(--selection)}.rating strong{font-size:13px;font-weight:600}.rating small{font-size:11px}.rating kbd{color:var(--muted);font-size:10px}.rating-1{border-bottom:3px solid var(--danger)}.rating-2{border-bottom:3px solid var(--warning)}.rating-3{border-bottom:3px solid var(--success)}.rating-4{border-bottom:3px solid var(--blue)}.study-toolbar{border-top:1px solid var(--line);flex-wrap:wrap;justify-content:space-between;gap:10px;margin-top:26px;padding-top:14px;display:flex}.study-toolbar .quiet{min-height:44px;padding:10px 13px;font-size:12px}.hint,.notice,.connection,.retry-panel{color:var(--warning);overflow-wrap:anywhere;background:#fcf5e9;border:1px solid #eddec6;border-radius:12px;padding:15px 18px;font-size:13px;line-height:1.8}.study>.notice,.study>.retry-panel{margin:18px 24px}.retry-panel p{margin-top:0}.error{color:var(--danger);overflow-wrap:anywhere;background:#fff0ef;border:1px solid #f2d5d1;border-radius:12px;margin:16px 0;padding:12px 16px;font-size:13px;line-height:1.8}.study>.error{margin:18px 24px}.panel p.error{color:var(--danger)}.error p{color:inherit;margin-top:0}.feedback{border:1px solid var(--line);color:var(--success);background:#eef7f0;border-radius:12px;padding:16px;font-size:13px;line-height:1.8}.feedback.wrong{color:var(--danger);background:#fff0ef}.feedback.pending{color:var(--warning);background:#fcf5e9}.summary{flex-wrap:wrap;gap:9px;margin:20px 0;display:flex}.summary span{background:var(--surface-soft);color:var(--muted);border-radius:10px;padding:9px 13px;font-size:13px}.panel{border-radius:var(--radius);min-width:0;margin:0 0 22px;padding:30px}.panel h1{letter-spacing:-.045em;margin:14px 0 12px;font-size:clamp(28px,3.2vw,36px);font-weight:650;line-height:1.4}.panel h2{letter-spacing:-.025em;overflow-wrap:anywhere;margin:0 0 16px;font-size:19px;font-weight:650;line-height:1.5}.panel h3{font-size:15px;line-height:1.6}.panel p{color:var(--muted);overflow-wrap:anywhere;font-size:14px;line-height:1.8}.panel-heading{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-bottom:18px;display:flex}.panel-heading h2{margin:0}.form-stack{gap:20px;margin-top:22px;display:grid}.form-stack>.primary,.form-stack>.quiet{justify-self:start}.form-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;display:grid}.form-stack label,.form-field,.voice-picker label,.audio-output label,.panel>label,.security-actions>label,.model-picker label{min-width:0;color:var(--ink);gap:8px;font-size:13px;font-weight:500;line-height:1.6;display:grid}.form-stack :is(input,select,textarea),.panel>label :is(input,textarea),.security-actions input{width:100%}.check-label{align-items:center;min-height:44px;gap:10px!important;display:flex!important}.voice-picker{flex-wrap:wrap;gap:14px;margin:20px 0;display:flex}.voice-picker label{flex:160px;max-width:100%}.voice-picker select{width:100%;max-width:100%}.audio-output{flex-wrap:wrap;align-items:center;gap:12px;margin:16px 0;display:flex}.audio-output audio{width:310px;max-width:100%}.audio-output small{color:var(--muted);font-size:12px}.audio-output p{width:100%}.audio-output label{align-items:center;gap:8px;display:flex}.security-actions{border-top:1px solid var(--line);margin-top:28px;padding-top:16px}.security-actions input{max-width:260px}.enrollment-secret,.sample{white-space:pre-wrap;overflow-wrap:anywhere;border:1px solid var(--line);background:var(--surface-soft);border-radius:12px;margin:16px 0;padding:16px;font-size:13px;line-height:1.8;display:block}.admin-tabs,.assistant-tabs{border:1px solid var(--line);background:var(--surface);border-radius:15px;width:fit-content;max-width:100%;margin:0 0 24px;padding:5px}.admin-tabs button,.assistant-tabs button{background:0 0;border:1px solid #0000}.admin-tabs button[aria-pressed=true],.assistant-tabs button[aria-pressed=true]{border-color:#0000}.admin-confirm{background:var(--surface-soft);flex-wrap:wrap;align-items:center;gap:18px;display:flex}.admin-confirm label{flex:220px;gap:8px;font-size:13px;display:grid}.admin-confirm p{flex:300px}.model-grants{gap:12px;display:grid}.table-scroll{max-width:100%;margin-top:18px;overflow-x:auto}table{border-collapse:collapse;text-align:left;width:100%;font-size:13px;line-height:1.7}th,td{border-bottom:1px solid var(--line);vertical-align:top;overflow-wrap:anywhere;min-width:90px;padding:13px 12px}th{color:var(--muted);background:var(--surface-soft);font-weight:550}.search-form{gap:12px;display:flex}.search-form input{background:var(--surface-soft);flex:1;min-width:0}.word-list{margin:20px 0}.word-list article{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:20px;padding:22px 0;display:flex}.word-list article>div{min-width:0}.word-list h2{letter-spacing:-.025em;margin:0 0 7px;font-size:21px}.word-list h2 small{color:var(--muted);margin-left:9px;font-size:13px;font-weight:400;display:inline-block}.word-list p{margin:0 0 8px;font-size:13px}.word-list .suspended h2{color:var(--muted)}.word-list .quiet{flex-shrink:0;min-height:44px;padding:10px 13px;font-size:12px}.word-status{color:var(--success);background:#eef7f0;border-radius:6px;margin:3px 4px 0 0;padding:3px 7px;font-size:10px;line-height:1.6;display:inline-block}.suspended .word-status{color:var(--muted);background:var(--surface-soft)}.pagination{color:var(--muted);justify-content:space-between;font-size:12px}.empty-state{text-align:center;justify-items:center;padding:40px 16px;display:grid}.empty-state h2{margin:18px 0 6px;font-size:18px}.empty-state p{max-width:420px;margin:0;font-size:13px}.model-picker{flex-wrap:wrap;align-items:end;gap:18px;padding:20px 24px;display:flex}.model-picker label{flex:220px;max-width:420px}.model-picker p{flex:220px;padding-bottom:10px}.assistant-grid{grid-template-columns:240px minmax(0,1fr);align-items:start;gap:22px;display:grid}.assistant-grid .panel{padding:24px}.assistant-grid aside h2{font-size:15px}.assistant-grid aside .quiet{min-height:44px;padding:10px 12px;font-size:12px}.history-list{flex-direction:column;gap:7px;max-height:460px;padding:3px;display:flex;overflow-y:auto}.history-list button{text-align:left;white-space:normal;overflow-wrap:anywhere;justify-content:flex-start;width:100%;line-height:1.7}.history-list button[aria-pressed=true],.listening-questions button[aria-pressed=true]{border-color:var(--blue);background:var(--selection);color:var(--blue)}.messages{flex-direction:column;gap:18px;max-height:600px;padding:6px 3px 20px;display:flex;overflow-y:auto}.empty-chat{text-align:center;align-content:center;justify-items:center;min-height:220px;display:grid}.empty-chat h2{letter-spacing:-.04em;font-size:25px}.empty-chat p{max-width:390px;margin:0;font-size:13px}.chat-panel .form-stack{border-top:1px solid var(--line);padding-top:20px}.message{background:var(--surface-soft);border-radius:17px 17px 17px 5px;align-self:flex-start;max-width:95%;padding:17px;line-height:1.8}.message.user{background:var(--selection);border-radius:17px 17px 5px;align-self:flex-end}.message strong{color:var(--muted);font-size:11px;font-weight:550}.message div{white-space:pre-wrap;overflow-wrap:anywhere;margin-top:7px;font-size:14px}.main-clause{border-left:3px solid var(--blue);background:var(--selection);overflow-wrap:anywhere;border-radius:12px;gap:8px;padding:20px;line-height:1.8;display:grid}.main-clause span{color:var(--muted);font-size:12px}.sentence-chunks{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:24px 0;display:grid}.sentence-chunks article{border:1px solid var(--line);border-radius:14px;min-width:0;padding:18px}.sentence-chunks span{color:var(--blue);font-size:12px}.sentence-chunks h3{overflow-wrap:anywhere}.sentence-chunks p{font-size:13px}.sentence-analysis li{margin-bottom:10px;font-size:14px;line-height:1.8}.understanding-check,.transcript{border-top:1px solid var(--line);margin-top:25px;padding-top:10px}.listening-questions{gap:30px;margin:30px 0;display:grid}.listening-questions legend{line-height:1.8}.listening-questions .choices{margin-top:5px}.listening-questions .feedback{margin-top:16px}.listening-questions .feedback p{color:inherit}.transcript p{white-space:pre-wrap}.login-shell{grid-template-columns:1.05fr 1fr;align-items:center;gap:70px;max-width:1090px;min-height:100dvh;padding-block:56px;display:grid}.login-story .brand{margin-bottom:70px}.login-story>h2{letter-spacing:-.05em;margin:15px 0 20px;font-size:clamp(30px,3.5vw,42px);font-weight:700;line-height:1.5}.login-story>p{color:var(--muted);font-size:14px;line-height:1.9}.login-features{gap:22px;margin-top:36px;display:grid}.login-features>div{align-items:center;gap:15px;display:flex}.login-features strong{margin-bottom:6px;font-size:13px;font-weight:600;display:block}.login-features small{color:var(--muted);font-size:12px;display:block}.login-panel{margin:0;padding:36px}.login-panel .form-stack>.primary{justify-self:stretch;width:100%;margin-top:4px}.login-badge{color:var(--muted);align-items:center;gap:7px;font-size:11px;display:inline-flex}.login-badge .icon{width:16px;height:16px}.password-field{display:block;position:relative}.password-field input{padding-right:50px}.password-toggle{width:44px;height:44px;color:var(--muted);background:0 0;border:0;border-radius:10px;place-items:center;padding:10px;display:grid;position:absolute;top:2px;right:2px}.password-toggle:hover{color:var(--ink)}.loading-shell{padding-top:40px}.loading-heading{align-items:center;gap:18px;margin-bottom:36px;display:flex}.loading-status{color:var(--muted);margin-bottom:28px;font-size:14px}.skeleton{background:var(--surface-soft);border-radius:7px;animation:1.6s ease-in-out infinite alternate breathe;display:block}.skeleton-label{width:70%;max-width:230px;height:14px}.skeleton-title{width:60%;max-width:310px;height:26px}.skeleton-value{width:45%;height:36px}.skeleton-card{justify-content:center}.skeleton-content{align-content:start;gap:24px;min-height:330px;display:grid}@keyframes breathe{0%{opacity:.5}to{opacity:1}}@supports ((-webkit-backdrop-filter:blur(1px)) or (backdrop-filter:blur(1px))){.app-topbar{-webkit-backdrop-filter:blur(18px)saturate(150%);backdrop-filter:blur(18px)saturate(150%);background:#fdfdfecc}}@media (max-width:1080px){.brand-detail{display:none}.app-topbar{gap:12px}.app-topbar nav a{padding-inline:10px}.study-layout{grid-template-columns:minmax(0,1fr) 250px;gap:18px}.learning-link{gap:10px;padding:18px 14px}.learning-link>.icon{display:none}}@media (max-width:900px){.shell{padding-inline:24px}.account-name{display:none}.study-layout{grid-template-columns:minmax(0,1fr)}.study-aside{grid-template-columns:repeat(2,minmax(0,1fr))}.stat{padding:20px}.login-shell{gap:35px}.login-panel{padding:28px}.login-story .brand{margin-bottom:45px}}@media (max-width:700px){html{scroll-padding-top:24px;scroll-padding-bottom:calc(110px + env(safe-area-inset-bottom,0px))}.shell{padding:0 20px calc(116px + env(safe-area-inset-bottom,0px))}.app-topbar{min-height:64px;box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none;background:0 0;border:0;gap:12px;margin-top:14px;padding:0;position:relative;top:auto}.brand{gap:10px;font-size:20px}.mark{border-radius:12px;width:36px;height:36px}.brand-detail{margin-left:9px;padding-left:9px;font-size:11px;display:inline-block}.account-menu{gap:4px}.account-menu .account-name{display:none}.account-avatar{width:29px;height:29px;font-size:12px}.app-topbar nav{z-index:30;left:max(16px, env(safe-area-inset-left,0px));right:max(16px, env(safe-area-inset-right,0px));bottom:calc(12px + env(safe-area-inset-bottom,0px));border:1px solid var(--line);background:var(--navigation);border-radius:23px;gap:4px;padding:7px;display:flex;position:fixed;box-shadow:0 5px 26px #191f301f,inset 0 1px #fff9}.app-topbar nav a{border-radius:16px;flex-direction:column;flex:1;gap:5px;min-width:0;min-height:57px;padding:7px 2px;font-size:10px;line-height:1.5}.app-topbar nav .icon{width:20px;height:20px}.intro{padding:28px 0 25px}.home-intro{flex-direction:column;align-items:flex-start;gap:20px}.hero-start{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.intro h1{margin-top:10px;font-size:clamp(29px,7vw,36px)}.intro p{font-size:13px}.eyebrow{letter-spacing:.07em;font-size:10px}.stats{gap:9px;margin-bottom:20px}.stat{border-radius:16px;gap:14px;min-height:145px;padding:14px 12px}.stat-label{flex-wrap:wrap;gap:8px;font-size:11px;line-height:1.5}.stat-label .stat-icon{border-radius:8px;width:25px;height:25px}.stat-label .icon{width:15px;height:15px}.stat strong{font-size:29px}.stat small{margin-left:4px;font-size:10px}.stat-note{font-size:10px}.empty,.question{padding:24px}.study{border-radius:21px}.study-aside{gap:12px}.study-aside .panel,.dimension-panel{border-radius:18px;padding:19px}.study-aside .aside-heading{align-items:flex-start;gap:8px}.aside-heading h2{padding-top:4px;font-size:13px}.budget-number{flex-wrap:wrap;gap:5px}.budget-number strong{font-size:31px}.dimension-list>div{font-size:11px}.budget-panel .setting-note,.dimension-panel .setting-note{font-size:11px!important}.text-link{font-size:11px}.learning-links{grid-template-columns:1fr;gap:10px}.learning-link{gap:15px;padding:17px 20px}.learning-link>.icon{display:block}.section-heading>span{font-size:11px}.panel{border-radius:21px;padding:24px}.panel h2{font-size:18px}.form-grid{grid-template-columns:1fr}.assistant-grid{grid-template-columns:1fr;gap:0}.assistant-grid aside .history-list{max-height:160px}.assistant-grid .panel{padding:22px}.assistant-tabs{gap:3px;width:100%;padding:4px;display:flex}.assistant-tabs button{flex:1;padding:10px 5px;font-size:12px}.assistant-tabs .icon{width:16px;height:16px}.model-picker{padding:20px}.model-picker label{max-width:none}.model-picker p{flex-basis:100%;padding:0}.sentence-chunks{grid-template-columns:1fr}.word-list article{flex-wrap:wrap;align-items:flex-start;gap:12px}.word-list h2 small{margin:6px 0 0;display:block}.word-list .quiet{margin-left:0}.admin-tabs button{padding:10px 12px;font-size:12px}.login-shell{max-width:500px;min-height:100dvh;padding-top:28px;padding-bottom:40px;display:block}.login-story .brand{margin:0 0 32px}.login-story>.eyebrow,.login-story>h2,.login-story>p,.login-features{display:none}.login-panel{padding:28px 24px}.loading-shell{padding-top:32px}.loading-heading{margin-bottom:30px}@supports ((-webkit-backdrop-filter:blur(1px)) or (backdrop-filter:blur(1px))){.app-topbar nav{-webkit-backdrop-filter:blur(16px)saturate(150%);backdrop-filter:blur(16px)saturate(150%);background:#fdfdfee0}}}@media (max-width:420px){.shell{padding-inline:16px}.stat{gap:12px;padding-inline:10px}.stat-label{gap:7px;display:grid}.stat-note{line-height:1.55}.empty,.question{padding:22px 20px}.type-options{grid-template-columns:1fr;gap:8px}.limit-options label{flex-basis:100%;min-width:0}.rating-buttons{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.rating kbd{display:none}.choices,.answer-comparison,.study-aside{grid-template-columns:1fr}.dimension-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.dimension-list>div,.dimension-list>div:first-child{border:0;padding:0}.study-aside .aside-heading{align-items:center}.aside-heading h2{padding-top:0}.panel{padding:22px 20px}.search-form{flex-wrap:wrap}.search-form input{flex-basis:100%}.assistant-tabs button{gap:5px;font-size:11px}.assistant-tabs .icon{width:14px;height:14px}.login-shell{padding-top:24px}.login-panel{padding:28px 22px}.brand-detail{display:none}}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--ink:#f5f5f7;--muted:#a8a8b0;--soft:#92929c;--blue:#81b9ff;--background:#161618;--surface:#202023;--surface-soft:#2a2a2e;--navigation:#242427;--line:#38383d;--control-line:#505058;--selection:#20334d;--success:#8dd3a3;--warning:#e7bf80;--danger:#ffa69e;--shadow:0 4px 22px #0000001f}body:before{background:radial-gradient(65% 42% at 88% 0,#354a772e,#0000 85%)}.blue{color:#93c2ff;background:#20334d}.purple{color:#d1b8fc;background:#352b4b}.green{color:#8dd3a3;background:#243c2d}.amber{color:#e7bf80;background:#433424}.hint,.notice,.connection,.retry-panel{background:#362e20;border-color:#55462d}.error{background:#3b2423;border-color:#613a35}.feedback,.word-status{background:#243c2d}.feedback.wrong{background:#3b2423}.feedback.pending{background:#362e20}.app-topbar{box-shadow:0 6px 24px #0000001f,inset 0 1px #ffffff0d}@supports ((-webkit-backdrop-filter:blur(1px)) or (backdrop-filter:blur(1px))){.app-topbar{background:#242427db}}}@media (prefers-color-scheme:dark) and (max-width:700px){.app-topbar{box-shadow:none;background:0 0}.app-topbar nav{background:var(--navigation)}@supports ((-webkit-backdrop-filter:blur(1px)) or (backdrop-filter:blur(1px))){.app-topbar nav{background:#242427eb}}}@media (prefers-reduced-transparency:reduce){.app-topbar,.app-topbar nav{-webkit-backdrop-filter:none;backdrop-filter:none;background:var(--navigation)}}@media (prefers-reduced-transparency:reduce) and (max-width:700px){.app-topbar{background:0 0}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}@media (prefers-contrast:more){:root{--muted:var(--ink);--soft:var(--ink);--line:currentColor;--control-line:currentColor}.app-topbar,.app-topbar nav{-webkit-backdrop-filter:none;backdrop-filter:none;background:var(--navigation)}.primary,.quiet,.rating,.segments button,.choices button,.type-options label{border:1px solid}.segments button[aria-pressed=true]{outline:2px solid var(--blue);outline-offset:-3px}.type-options label:has(input:checked){outline:2px solid var(--blue);outline-offset:-3px}}@media (prefers-contrast:more) and (max-width:700px){.app-topbar{background:0 0}}@media (forced-colors:active){.app-topbar,.app-topbar nav,.glass,.study{box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none;background:canvas;border:1px solid canvastext}.primary,.quiet,.choices button,.rating{border:1px solid buttontext}.app-topbar nav a[aria-current=page],.segments button[aria-pressed=true]{outline:2px solid highlight}.mark,.account-avatar,.stat-icon,.feature-icon{color:canvastext;background:canvas;border:1px solid canvastext}}.learning-home,.practice-layout,.challenge-layout,.learning-admin{padding-top:28px}.learning-hero{max-width:780px;padding:38px 0 46px}.eyebrow{color:var(--muted);letter-spacing:.12em;font-size:12px;font-weight:650}.learning-hero h1{letter-spacing:-.055em;margin:20px 0;font-size:clamp(40px,6vw,68px);font-weight:650;line-height:1.13}.learning-hero>p{color:var(--muted);font-size:18px;line-height:1.7}.subject-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;display:grid}.subject-card{border:1px solid var(--line);background:var(--surface);min-height:245px;color:var(--ink);box-shadow:var(--shadow);border-radius:28px;flex-direction:column;align-items:flex-start;padding:28px;text-decoration:none;transition:transform .2s,box-shadow .2s;display:flex;position:relative}.subject-card:hover{transform:translateY(-4px);box-shadow:0 14px 36px #1a295014}.subject-card h2{letter-spacing:-.04em;margin:24px 0 8px;font-size:26px}.subject-card p{color:var(--muted);margin:0;font-size:14px}.subject-symbol{color:#445a94;background:#edf1ff;border-radius:16px;place-items:center;width:50px;height:50px;font-size:24px;font-weight:600;display:grid}.subject-pink .subject-symbol{color:#964a62;background:#faedf1}.subject-green .subject-symbol{color:#3a7754;background:#eaf3ee}.subject-yellow .subject-symbol{color:#87612c;background:#faf2df}.subject-purple .subject-symbol{color:#6b50a5;background:#f1edfa}.subject-count{width:100%;color:var(--muted);justify-content:space-between;margin-top:26px;font-size:12px;display:flex}.subject-count>span{font-size:19px}.learning-shortcuts{grid-template-columns:1fr 1fr;gap:18px;margin-top:30px;display:grid}.learning-shortcuts>a{color:var(--ink);padding:28px;text-decoration:none}.learning-shortcuts h2{letter-spacing:-.03em;margin:18px 0 10px;font-size:27px}.learning-shortcuts p{color:var(--muted)}.learning-shortcuts>a>span:last-child{color:var(--blue);font-size:14px}.subject-tabs{flex-wrap:wrap;gap:8px;margin:18px 0 28px;display:flex}.subject-tabs button{min-height:40px;padding:9px 16px}.learning-filters{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:18px;display:grid}.learning-filters>label{min-width:0}.filter-panel,.question-panel,.dynamic-panel{margin-bottom:24px}.learning-admin .panel{margin:24px 0}.learning-admin form>label,.personal-api form>label,.filter-panel>label{flex-direction:column;gap:9px;margin:18px 0;display:flex}.learning-admin input:not([type=checkbox]),.learning-admin select,.personal-api input:not([type=checkbox]){width:100%}.learning-admin textarea,.question-part textarea,.embedded-tutor textarea{resize:vertical;width:100%;max-width:100%;line-height:1.8}.chapter-picker{border:0;margin:24px 0;padding:0}.chapter-picker legend{color:var(--muted);margin-bottom:14px;font-size:14px}.chapter-picker>label{border-bottom:1px solid var(--line);align-items:center;gap:12px;padding:12px 0;display:flex}.chapter-picker small{color:var(--muted);margin-top:4px;font-size:12px;display:block}.check-label{align-items:center;font-size:14px;flex-direction:row!important;gap:10px!important;display:flex!important}.check-label input,.chapter-picker input{width:17px;height:17px;accent-color:var(--blue);flex-shrink:0}.question-heading,.question-submit,.timeline-toolbar,.timeline-controls{justify-content:space-between;align-items:center;gap:14px;display:flex}.question-submit{flex-wrap:wrap;justify-content:flex-start;margin:22px 0}.practice-timer{font-variant-numeric:tabular-nums;letter-spacing:.04em;font-size:24px}.urgent{color:var(--danger)}.reading-passage{white-space:pre-wrap;overflow-wrap:anywhere;background:var(--surface-soft);border-radius:18px;margin:24px 0;padding:24px;font-size:17px;line-height:1.95}.preserve-text{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.8}.question-part{border:0;border-top:1px solid var(--line);margin:20px 0;padding:24px 0}.question-part legend{padding:0 8px 0 0;font-size:17px;line-height:1.7}.question-part small{color:var(--muted);font-size:12px}.question-choices{gap:10px;margin:12px 0;display:grid}.question-choices>label{border:1px solid var(--line);border-radius:14px;align-items:flex-start;gap:12px;min-height:52px;padding:14px 16px;line-height:1.6;display:flex}.question-choices input{accent-color:var(--blue);margin-top:5px}.question-choices .picked{background:var(--selection);border-color:var(--blue)}.reference-answer{color:var(--success);line-height:1.7}.question-figure img,.active-figure img{object-fit:contain;background:#fff;border-radius:12px;max-width:100%;height:auto;max-height:520px}.question-figure,.active-figure{text-align:center;margin:24px 0}.question-figure figcaption,.active-figure figcaption{color:var(--muted);margin-top:10px;font-size:12px}.file-button{color:var(--blue);margin:20px 0;font-size:14px;display:block}.file-button input{max-width:100%;margin-top:10px;display:block}.word-counter{font-variant-numeric:tabular-nums;font-size:14px}.word-counter span{color:var(--muted);margin-left:8px;font-size:12px}.learning-feedback{background:var(--surface-soft);border-radius:18px;margin:20px 0;padding:22px}.learning-feedback h3{margin-top:0}.learning-feedback p{line-height:1.8}.learning-feedback blockquote{border-left:3px solid var(--control-line);margin:14px 0;padding-left:14px}.question-panel details{margin:24px 0}.question-panel summary,.timeline-player summary{cursor:pointer;color:var(--blue);padding:8px 0}.timeline-toolbar h3{margin:8px 0}.timeline-source{white-space:pre-wrap;overflow-wrap:anywhere;background:var(--surface-soft);border-radius:20px;margin-top:20px;padding:32px 24px;font-size:20px;line-height:2.6}.highlight{color:inherit;-webkit-box-decoration-break:clone;box-decoration-break:clone;border:2px solid #0000;border-radius:16px;padding:3px 4px;transition:background-color .5s,border-color .5s;animation:.6s ease-out mark-appear;position:relative}.tone-yellow{background:#fff09da6;border-color:#d4b842}.tone-green{background:#b5ebc2a6;border-color:#609b6d}.tone-blue{background:#b9daffa6;border-color:#639bd0}.tone-pink{background:#f9c7d9a6;border-color:#cf86a2}.tone-purple{background:#dec9f9a6;border-color:#9d7cc4}.annotation-role{white-space:nowrap;color:var(--ink);background:var(--surface);box-shadow:var(--shadow);border-radius:5px;padding:1px 5px;font-size:10px;font-weight:650;line-height:1.5;position:absolute;bottom:100%;left:0}.timeline-explanation{padding:20px 8px;line-height:1.9;animation:.35s ease-out step-appear}.timeline-controls{gap:16px;margin:12px 0 20px}.timeline-scrubber{flex:1}.timeline-scrubber input{width:100%;accent-color:var(--blue)}.embedded-tutor{border-top:1px solid var(--line);margin-top:28px;padding-top:20px}.embedded-tutor label{display:block}.embedded-tutor textarea{margin:10px 0}.step-dialogue{background:var(--surface-soft);border-radius:14px;margin:14px 0;padding:14px 18px}.step-dialogue p{line-height:1.7}.text-button{color:var(--blue);text-align:left;font:inherit;background:0 0;border:0;padding:4px 0}.timeline-player .text-button{display:inline}.challenge-layout{max-width:920px;margin:auto}.challenge-settings>label{max-width:300px}.difficulty-picker{border:0;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:20px 0;padding:0;display:grid}.difficulty-picker legend{margin-bottom:14px;font-size:14px}.difficulty-picker>label{border:1px solid var(--line);cursor:pointer;border-radius:16px;padding:18px;position:relative}.difficulty-picker input{accent-color:var(--blue);margin:0 8px 0 0}.difficulty-picker strong{font-size:18px}.difficulty-picker span{color:var(--muted);margin-top:10px;font-size:12px;line-height:1.7;display:block}.difficulty-picker .selected{border-color:var(--blue);background:var(--selection)}.challenge-clock{text-align:center;font-variant-numeric:tabular-nums}.challenge-clock strong{letter-spacing:-.05em;font-size:56px;font-weight:550}.challenge-clock span{color:var(--muted);margin-left:8px}.challenge-question{margin-top:24px}.challenge-question h2{text-align:center;padding:16px 0;font-size:28px;line-height:1.6}.challenge-progress{background:var(--line);border-radius:8px;height:5px;margin:14px 0;overflow:hidden}.challenge-progress>span{background:var(--blue);transform-origin:0;height:100%;display:block}.difficulty-despair .challenge-progress>span{background:var(--danger)}.challenge-options{grid-template-columns:1fr 1fr;gap:12px;display:grid}.challenge-options>button{text-align:left;border:1px solid var(--control-line);background:var(--surface);min-height:90px;color:var(--ink);border-radius:18px;align-items:center;gap:12px;padding:22px;font-size:20px;display:flex}.challenge-options>button:disabled{opacity:1}.challenge-options kbd{font:inherit;color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:5px 8px;font-size:12px}.challenge-options small{color:var(--muted);margin-bottom:5px;font-size:13px;display:block}.challenge-options .choice-correct{color:#205232;background:#e8f5ec;border-color:#3d8455}.challenge-options .choice-wrong{color:#873c37;background:#fff0ef;border-color:#ba544d}.challenge-verdict{text-align:center;margin-top:24px}.challenge-score{color:var(--muted);font-size:14px}.admin-reauth{align-items:center;gap:16px;max-width:600px;font-size:14px;display:flex}.document-list>article,.outline-chapter,.word-set-review{border-bottom:1px solid var(--line);padding:22px 0}.document-list small{color:var(--muted);margin:8px 0;display:block}.source-page-links{flex-wrap:wrap;gap:12px;margin:12px 0;font-size:13px;display:flex}.json-editor{font-family:ui-monospace,monospace;font-size:13px;line-height:1.6}.word-set-review li{line-height:1.8}.notice{background:var(--selection);border-radius:16px;padding:18px}.section-links{margin:24px 0;font-size:14px}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@keyframes mark-appear{0%{background:0 0;border-color:#0000}to{}}@keyframes step-appear{0%{opacity:.4;transform:translateY(5px)}to{opacity:1;transform:none}}@media (max-width:800px){.subject-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.subject-card{min-height:220px;padding:22px}.learning-hero{padding-top:18px}.timeline-source{padding:28px 18px;font-size:18px}.difficulty-picker{gap:8px}.difficulty-picker>label{padding:14px}}@media (max-width:480px){.learning-home,.practice-layout,.challenge-layout,.learning-admin{padding-top:10px}.learning-hero{padding-bottom:30px}.learning-hero h1{font-size:42px}.learning-hero>p{font-size:15px}.subject-grid{gap:12px}.subject-card{border-radius:22px;min-height:215px;padding:18px}.subject-card h2{font-size:23px}.subject-card p{font-size:12px;line-height:1.6}.subject-symbol{width:42px;height:42px;font-size:21px}.subject-count{margin-top:20px;font-size:10px}.learning-shortcuts,.difficulty-picker{grid-template-columns:1fr}.difficulty-picker>label{padding:14px 16px}.difficulty-picker span{margin:0 0 0 12px;display:inline}.challenge-options{grid-template-columns:1fr}.challenge-options>button{min-height:70px;padding:16px}.challenge-question h2{font-size:23px}.admin-reauth{flex-direction:column;align-items:stretch}.learning-filters{grid-template-columns:1fr}.timeline-toolbar{align-items:flex-start}.timeline-toolbar button{white-space:nowrap;font-size:12px}.word-counter span{margin:8px 0;display:block}.reading-passage{padding:18px;font-size:16px}}@media (prefers-color-scheme:dark){.subject-symbol{color:#a8c8f5;background:#273047}.subject-pink .subject-symbol{color:#e5afc3;background:#422b35}.subject-green .subject-symbol{color:#aed7ba;background:#263b31}.subject-yellow .subject-symbol{color:#e3cb91;background:#3c3425}.subject-purple .subject-symbol{color:#cfb7eb;background:#352c48}.highlight{color:#17191c}.annotation-role{color:var(--ink)}.challenge-options .choice-correct{color:#b9e7c7;background:#213f2d}.challenge-options .choice-wrong{color:#f2c0bc;background:#462b29}}@media (prefers-reduced-motion:reduce){.subject-card,.highlight,.timeline-explanation{transition:none;animation:none}.subject-card:hover{transform:none}}@media (forced-colors:active){.highlight{color:marktext;background:mark;border:2px solid marktext}.challenge-options .choice-correct{border:3px double highlight}.subject-card{border:1px solid canvastext}}.question-choices input[type=radio],.question-choices input[type=checkbox],.difficulty-picker input[type=radio],.chapter-picker input[type=checkbox],.check-label input[type=checkbox]{border-radius:initial;flex:0 0 18px;width:18px;min-width:18px;height:18px;min-height:18px;padding:0}.math-text{white-space:pre-wrap;overflow-wrap:anywhere}.math-display{max-width:100%;padding:4px 0;display:block;overflow:auto hidden}.math-text .katex{white-space:normal;font-size:1.08em}.practice-steps{flex-wrap:wrap;gap:24px;margin:24px 0 0;padding:0;list-style:none;display:flex}.practice-steps li{color:var(--muted);align-items:center;gap:8px;font-size:13px;display:flex}.practice-steps li span{border:1px solid var(--line);font-variant-numeric:tabular-nums;border-radius:50%;place-items:center;width:24px;height:24px;display:grid}.practice-steps li[aria-current]{color:var(--blue);font-weight:650}.practice-steps li[aria-current] span{background:var(--blue);border-color:var(--blue);color:#fff}.practice-setup{grid-template-columns:minmax(0,1.6fr) minmax(280px,1fr);align-items:start;gap:24px;display:grid}.model-setup{position:sticky;top:96px}.learning-model-picker{min-width:0}.learning-model-picker h3{margin:0;font-size:18px}.learning-model-picker>label,.reviewer-picker>label:not(.check-label){flex-direction:column;gap:8px;margin:20px 0;display:flex}.learning-model-picker small{color:var(--muted);line-height:1.6}.learning-model-picker select{width:100%;min-width:0}.access-badge{border:1px solid var(--line);color:var(--muted);white-space:normal;border-radius:99px;align-items:center;padding:5px 10px;font-size:11px;display:inline-flex}.learning-model-picker .panel-heading{flex-wrap:wrap;gap:10px}.reviewer-picker{border:1px solid var(--line);border-radius:16px;min-width:0;margin:20px 0;padding:16px}.reviewer-picker legend{padding:0 6px;font-size:13px}.reviewer-picker .check-label{padding:9px 0}.range-summary{background:var(--surface-soft);color:var(--muted);border-radius:12px;padding:12px 16px;font-size:13px}.practice-context{justify-content:space-between;align-items:start;gap:18px;margin-bottom:24px;font-size:14px;display:flex}.practice-context>div{padding:12px 0}.practice-context span{color:var(--muted)}.practice-context details{background:var(--surface);border:1px solid var(--line);border-radius:16px;width:min(420px,100%);padding:14px 18px}.practice-context details[open] summary{margin-bottom:24px}.practice-session{max-width:880px;margin:auto}.practice-session.reviewed{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:start;gap:24px;max-width:none;display:grid}.practice-session .question-panel,.practice-session .dynamic-panel{min-width:0}.dynamic-panel .panel-heading h2{margin:0;font-size:24px}.explanation-request{padding:22px 0 8px}@media (max-width:900px){.practice-setup,.practice-session.reviewed{grid-template-columns:1fr}.model-setup{position:static}.practice-context{flex-direction:column}.practice-context details{width:100%}}@media (max-width:450px){.practice-steps{gap:12px}.practice-steps li{gap:6px;font-size:11px}}.learning-filters>label{flex-direction:column;gap:8px;display:flex}.learning-filters select{width:100%}.question-choices label.correct-choice{background:color-mix(in srgb, #43a66c 10%, var(--surface));border-color:#43a66c}.question-choices label.incorrect-choice{border-color:var(--danger);background:color-mix(in srgb, var(--danger) 7%, var(--surface))}.answer-outcome{margin-top:16px;font-size:13px;font-weight:600}fieldset,.panel,.study,.assistant-grid>*,.form-grid>*{min-inline-size:0}input,select,textarea,video,canvas{max-inline-size:100%}:is(.question-panel,.learning-feedback,.dynamic-panel,.challenge-question,.figure-dialog){scroll-margin-top:120px}.adaptive-toggle{width:100%;min-height:44px;color:var(--ink);font:inherit;text-align:left;background:0 0;border:0;justify-content:space-between;align-items:center;gap:16px;padding:4px 0;font-weight:600;display:flex}.adaptive-toggle>span:last-child{color:var(--muted);font-size:20px}.adaptive-content{padding-top:18px}[hidden]{display:none!important}.review-jumps{flex-wrap:wrap;gap:12px;margin:0 0 20px;display:flex}.review-jumps a{background:var(--surface);border:1px solid var(--line);border-radius:12px;align-items:center;min-height:44px;padding:10px 16px;font-size:13px;text-decoration:none;display:inline-flex}.timeline-scrubber{align-items:center;min-width:0;min-height:44px;display:flex}.timeline-scrubber input{min-height:44px;padding:8px 0}.timeline-player summary,.question-panel summary,.challenge-settings summary{cursor:pointer;min-height:44px;padding-block:12px}.challenge-settings details>label{gap:8px;max-width:360px;margin-top:18px;display:grid}.challenge-settings .question-submit{margin-bottom:0}.figure-open{border:1px solid var(--line);background:var(--surface-soft);width:100%;color:var(--blue);border-radius:14px;flex-direction:column;justify-content:center;align-items:center;gap:8px;min-height:44px;padding:10px;display:flex;position:relative}.figure-open span{font-size:12px}.figure-dialog{width:min(1120px,100vw - 32px);max-width:none;max-height:calc(var(--visual-height,100dvh) - 32px);border:1px solid var(--line);color:var(--ink);background:var(--surface);border-radius:20px;padding:20px}.figure-dialog::backdrop{background:#0a101ea8}body:has(.figure-dialog[open]){overflow:hidden}.figure-toolbar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px;margin-bottom:16px;display:flex}.figure-toolbar strong{overflow-wrap:anywhere;max-width:44ch}.figure-toolbar label{flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;display:flex}.figure-toolbar input{width:130px;min-height:44px}.figure-toolbar output{min-width:45px}.figure-canvas{max-height:calc(var(--visual-height,100dvh) - 180px);background:#fff;border-radius:10px;overflow:auto}.figure-dialog .figure-canvas img{border-radius:0;max-width:none;height:auto;max-height:none;margin:auto;display:block}.admin-tabs,.learning-admin-tabs{overscroll-behavior-x:contain;flex-wrap:nowrap;padding:6px;scroll-padding:6px;display:flex;overflow-x:auto}.admin-tabs button,.learning-admin-tabs button{white-space:nowrap;flex:none;min-height:44px}.source-page-links a{align-items:center;min-height:44px;padding:8px 12px;display:inline-flex}.table-scroll:focus-visible{outline:3px solid var(--blue);outline-offset:4px}.model-setup{position:static}@media (min-width:1200px) and (min-height:720px){.model-setup{position:sticky;top:112px}}@media (min-width:701px) and (max-width:1024px){.app-topbar{flex-wrap:wrap;gap:8px 16px;position:relative;top:0}.app-topbar .brand{flex:1}.app-topbar .account-menu{margin-left:auto}.app-topbar nav{border-top:1px solid var(--line);flex-basis:100%;order:3;justify-content:space-between;padding-top:8px}.app-topbar nav a{flex:1;padding-inline:8px}.assistant-grid{grid-template-columns:1fr}html{scroll-padding-top:24px}:is(.question-panel,.learning-feedback,.dynamic-panel,.challenge-question){scroll-margin-top:20px}}@media (min-width:901px) and (max-width:1179px){.practice-session.reviewed{grid-template-columns:minmax(0,1fr);max-width:880px}}@media (max-width:700px){.shell{padding-inline:max(16px, env(safe-area-inset-left,0px)) max(16px, env(safe-area-inset-right,0px))}:is(.question-panel,.learning-feedback,.dynamic-panel,.challenge-question){scroll-margin-top:20px}html[data-keyboard-open=true] .app-topbar nav{display:none}html[data-keyboard-open=true]{scroll-padding-bottom:24px}.figure-dialog{width:calc(100vw - 16px);padding:14px}.figure-toolbar{gap:8px}.figure-toolbar label{flex:170px}.figure-toolbar input{width:100px}.figure-canvas{max-height:calc(var(--visual-height,100dvh) - 210px)}.review-jumps a{flex:1;justify-content:center}}@media (max-height:500px) and (min-width:600px){.app-topbar{flex-wrap:wrap;min-height:0;padding:8px 14px;position:relative;top:auto}.app-topbar .brand{flex:1}.app-topbar nav{width:100%;box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none;background:var(--surface);flex-direction:row;flex-basis:100%;order:3;gap:4px;padding:4px;position:static}.app-topbar nav a{flex-direction:row;flex:1;gap:6px;min-height:44px;padding:6px;font-size:12px}.app-topbar nav .icon{width:17px;height:17px}.shell{padding-bottom:32px}.learning-hero{padding-block:20px}.page-intro{padding-block:14px}:is(.question-panel,.learning-feedback,.dynamic-panel,.challenge-question){scroll-margin-top:12px}.figure-dialog{max-height:calc(var(--visual-height,100dvh) - 16px)}.figure-canvas{max-height:calc(var(--visual-height,100dvh) - 150px)}}@media (max-width:420px){.timeline-controls{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;display:grid}.timeline-scrubber{grid-area:2/1/auto/-1}.timeline-controls>button{width:100%}.learning-feedback{padding:16px}.timeline-source{padding:26px 16px;font-size:18px}.review-jumps{gap:8px}.review-jumps a{padding-inline:8px;font-size:12px}}@media (pointer:coarse){.chapter-picker label,.check-label{min-height:48px}summary,.text-button{min-height:44px}}@media (hover:none){.subject-card:hover{transform:none}}.challenge-session-actions{color:var(--muted);justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px;font-size:12px;display:flex}@media (max-width:480px){.challenge-options{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.challenge-options>button{gap:8px;min-height:86px;padding:12px}.challenge-clock strong{font-size:42px}}@media (max-height:500px) and (min-width:600px){.challenge-question{grid-template-columns:140px minmax(0,1fr);grid-template-areas:"actions actions""clock options""progress options""prompt options""verdict verdict";gap:8px 18px;padding:16px;display:grid}.challenge-session-actions{grid-area:actions;margin:0}.challenge-clock{grid-area:clock}.challenge-clock strong{font-size:38px}.challenge-progress{grid-area:progress;margin:0}.challenge-question h2{text-align:center;grid-area:prompt;margin:0;font-size:23px}.challenge-options{grid-area:options;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.challenge-options>button{min-height:68px;padding:12px}.challenge-verdict{grid-area:verdict;margin:0}}@media (pointer:coarse){textarea.json-editor{font-size:16px}}.timeline-player .text-button{vertical-align:middle;align-items:center;min-height:44px;display:inline-flex}:root{--page-gutter:32px}.shell:not(.login-shell):not(.loading-shell){padding-inline:max(var(--page-gutter), env(safe-area-inset-left,0px)) max(var(--page-gutter), env(safe-area-inset-right,0px));padding-top:env(safe-area-inset-top,0px)}.check-label,.chapter-picker label,.word-list h2,.model-grants,.panel-heading{overflow-wrap:anywhere}@media (max-width:900px){:root{--page-gutter:24px}}@media (max-width:700px){:root{--page-gutter:16px}}.model-catalog-dialog{border:1px solid var(--line,#ddd);background:var(--surface,#fff);width:min(960px,100vw - 24px);max-height:90dvh;color:var(--text,#222);border-radius:24px;padding:24px;overflow:auto}.catalog-actions{background:inherit;flex-wrap:wrap;gap:12px;padding:16px 0;display:flex;position:sticky;bottom:0}.catalog-metadata{gap:12px;max-height:320px;display:grid;overflow:auto}.catalog-metadata article{overflow-wrap:anywhere;border-bottom:1px solid #8884;gap:4px;padding:12px 0;display:grid}.route-order{padding-left:24px}.route-order li{justify-content:space-between;align-items:center;gap:12px;margin:8px 0;display:flex}.catalog-metadata code{white-space:normal}@media (max-width:600px){.model-catalog-dialog{border-radius:18px;padding:16px}.catalog-actions>*{flex:1}}.admin-settings-nav{flex-wrap:wrap;gap:8px;margin:18px 0;display:flex}.admin-settings-nav a{background:#8881;border-radius:14px;align-items:center;min-height:44px;padding:10px 14px;font-size:14px;display:flex}.resource-workspace{min-width:0;max-width:1500px;margin:0 auto;padding:24px}.resource-links,.resource-actions,.resource-bulk{flex-wrap:wrap;align-items:center;gap:12px;margin:12px 0;display:flex}.resource-workspace form{flex-wrap:wrap;align-items:end;gap:14px;margin:16px 0;display:flex}.resource-workspace label{gap:6px;min-width:0;display:grid}.resource-workspace label:has(input[type=checkbox]){align-items:center;display:flex}.resource-workspace input,.resource-workspace select{min-width:0;max-width:100%}.resource-stage-tabs{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:24px 0;display:grid}.resource-stage-tabs button{white-space:normal;justify-content:space-between;gap:12px;display:flex}.resource-stage-tabs [aria-pressed=true]{background:var(--accent,#3262d6);color:#fff}.resource-filters{flex-wrap:wrap;align-items:end;gap:16px;display:flex}.resource-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,390px),1fr));gap:20px;display:grid}.resource-card{overflow-wrap:anywhere;min-width:0}.resource-card h2{font-size:1.2rem}.resource-card-heading{align-items:start;gap:12px;display:flex}.resource-tags{flex-wrap:wrap;gap:6px;display:flex}.resource-tags span{color:#243655;background:#e8edf7;border-radius:8px;padding:4px 8px}.resource-job{border-top:1px solid #dfe4ec;margin-top:16px;padding-top:12px}.resource-job pre{white-space:pre-wrap;overflow-wrap:anywhere;max-height:140px;font-size:.8rem;overflow:auto}.resource-modal{z-index:100;background:#07152980;place-items:center;padding:16px;display:grid;position:fixed;inset:0}.resource-modal>section{width:min(640px,100%);max-height:90dvh;overflow:auto}.resource-modal form{align-items:stretch;display:grid}.resource-modal fieldset{flex-wrap:wrap;gap:12px;display:flex}@media (max-width:600px){.resource-workspace{padding:14px}.resource-stage-tabs{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.resource-workspace form>*{max-width:100%}.resource-filters label{flex:150px}.resource-workspace button,.resource-workspace a{min-height:40px}.resource-actions{gap:10px}}.share-tree{gap:8px;max-height:65vh;margin:18px 0;display:grid;overflow:auto}.share-tree label{overflow-wrap:anywhere;border-bottom:1px solid #dfe4ec;align-items:start;gap:10px;padding:10px;display:flex}.share-tree small{color:#52617b;margin-top:4px;display:block}.share-tree span{min-width:0}.resource-review-split{grid-template-columns:minmax(300px,1fr) minmax(350px,1fr);align-items:start;gap:24px;display:grid}.resource-source-pane{min-width:0;position:sticky;top:20px}.resource-source-pane iframe{border:1px solid #dfe4ec;border-radius:12px;width:100%;height:75dvh;margin-top:12px}.resource-result-pane{min-width:0}.resource-unit{overflow-wrap:anywhere;margin-bottom:16px}.resource-unit pre{white-space:pre-wrap;overflow-wrap:anywhere}.resource-pane-toggle{display:none}.resource-modal textarea{width:100%;min-width:0;font-family:monospace;font-size:.85rem}@media (max-width:850px){.resource-review-split{display:block}.resource-pane-toggle{gap:12px;margin:20px 0;display:flex}.resource-source-pane,.resource-result-pane{display:none}.resource-source-pane.visible,.resource-result-pane.visible{display:block}.resource-source-pane{position:static}}.unit-form{gap:14px;display:grid}.unit-form fieldset{padding:12px}.unit-form input,.unit-form select,.unit-form textarea{width:100%}.unit-form input[type=checkbox]{width:auto}.resource-workspace .card figure img{max-width:100%;height:auto}.resource-workspace section.card{margin-bottom:20px}@media (max-width:700px){.app-topbar nav{left:max(8px,env(safe-area-inset-left,0px));right:max(8px,env(safe-area-inset-right,0px));gap:2px;padding:4px}.app-topbar nav a{min-width:44px;padding-inline:1px}.resource-workspace{padding-bottom:calc(110px + env(safe-area-inset-bottom,0px))}}.job-log{white-space:pre-wrap;overflow-wrap:anywhere;max-height:240px;overflow:auto}.resource-filters select{max-width:320px}.resource-workspace>details{margin:18px 0}.resource-workspace select[multiple]{min-height:130px}.resource-workspace header,.resource-workspace>h1{scroll-margin-top:100px}.resource-workspace p[role=status]{min-height:24px}.resource-workspace .card{background:var(--surface,#fff);border:1px solid var(--line,#dce1ea);border-radius:22px;padding:24px;box-shadow:0 4px 20px #23304b06}.resource-workspace h1{letter-spacing:-.03em;font-size:clamp(26px,3vw,38px)}.resource-workspace h2{font-size:20px;line-height:1.5}.resource-workspace p{line-height:1.7}.resource-workspace button{border:1px solid var(--line,#dce1ea);background:var(--surface,#fff);min-height:44px;color:var(--ink,#1d1d1f);border-radius:12px;padding:10px 14px;font-size:14px}.resource-workspace button:hover:enabled{background:#eaf0fa}.resource-workspace input:not([type=checkbox]),.resource-workspace select,.resource-workspace textarea{border:1px solid var(--line,#dce1ea);background:var(--surface,#fff);width:100%;min-height:44px;color:var(--ink,#1d1d1f);border-radius:10px;padding:10px 12px;font-size:15px}.resource-workspace input[type=checkbox]{flex-shrink:0;width:20px;height:20px}.resource-workspace label:has(input[type=checkbox]){min-height:44px}.resource-workspace label{font-size:14px;line-height:1.5}.resource-workspace form>label{flex:220px}.resource-stage-tabs button[aria-pressed=true]{background:var(--blue,#06c);color:#fff}.resource-workspace summary{cursor:pointer;min-height:44px;padding-block:10px;line-height:1.6;display:list-item}.resource-workspace details{overflow-wrap:anywhere}.resource-source-pane>a{align-items:center;min-height:44px;display:inline-flex}.resource-unit figure{margin:12px 0}.resource-modal fieldset{min-width:0}.resource-tags button{font-size:13px}.resource-grid small{overflow-wrap:anywhere}@media (max-width:600px){.resource-workspace .card{border-radius:18px;padding:16px}.resource-workspace form>label{flex-basis:100%}.resource-workspace .resource-stage-tabs button{padding:10px 12px}.resource-workspace .resource-filters label{flex-basis:100%}.resource-workspace .resource-bulk{align-items:stretch}.resource-workspace .resource-modal{padding:8px}.resource-workspace .resource-modal>section{width:100%;max-height:94dvh}}@media (min-width:701px) and (max-width:1250px){.app-topbar{flex-wrap:wrap;gap:8px 16px}.app-topbar .brand{flex:1}.app-topbar .account-menu{margin-left:auto}.app-topbar nav{border-top:1px solid var(--line);flex-basis:100%;order:3;justify-content:space-between;padding-top:8px}.app-topbar nav a{flex:1;min-width:44px;padding-inline:8px}}.resource-original-image{border:1px solid var(--line);background:#fff;border-radius:12px;max-width:100%;height:auto;display:block}.resource-source-pane figure{margin:12px 0}.resource-source-pane figcaption{color:var(--muted);font-size:12px;line-height:1.6}@media (min-width:851px){.resource-source-pane{overscroll-behavior:contain;max-height:calc(100dvh - 40px);padding-bottom:12px;overflow:auto}}.admin-root .admin-workspace-layout,.resource-workspace .admin-workspace-layout{grid-template-columns:minmax(228px,250px) minmax(0,1fr);align-items:start;gap:clamp(16px,2vw,30px);min-width:0;margin-top:20px;display:grid}.admin-workspace-content{min-width:0}.admin-root .intro{padding:8px 0 22px}.admin-root .intro h1{margin:8px 0;font-size:clamp(25px,2.6vw,34px)}.admin-root .intro p{max-width:760px}.admin-root .admin-settings-nav,.resource-workspace .admin-settings-nav{overscroll-behavior:contain;background:var(--surface);border:1px solid var(--line);max-height:calc(100dvh - 134px);box-shadow:var(--shadow);border-radius:20px;align-content:start;gap:16px;margin:0;padding:18px 12px;display:grid;position:sticky;top:118px;overflow-y:auto}.admin-nav-title{justify-content:space-between;align-items:baseline;gap:8px;padding:0 10px;font-size:18px;font-weight:700;display:flex}.admin-nav-title span{color:var(--muted);font-size:11px;font-weight:500}.admin-nav-heading{letter-spacing:.06em;color:var(--muted);margin:0 0 6px;padding:0 10px;font-size:11px;font-weight:600}.admin-nav-links{gap:2px;display:grid}.admin-settings-nav .admin-nav-links a{min-height:54px;color:var(--ink);background:0 0;border:1px solid #0000;border-radius:12px;align-items:center;gap:2px;padding:9px 11px;font-size:13px;text-decoration:none;display:grid}.admin-settings-nav .admin-nav-links a strong{font-weight:600}.admin-settings-nav .admin-nav-links a small{color:var(--muted);font-size:11px}.admin-settings-nav .admin-nav-links a:hover{background:var(--surface-soft)}.admin-settings-nav .admin-nav-links a[aria-current=page]{background:var(--selection);color:var(--blue);border-color:#cfe1fa}.admin-settings-nav .admin-nav-links a[aria-current=page] small{color:var(--blue);opacity:.8}.admin-root .admin-workspace-content>.panel{max-width:none}.model-catalog-dialog{box-sizing:border-box;background:var(--surface);border:1px solid var(--line);border-radius:22px;width:min(1040px,100vw - 32px);max-width:none;height:min(850px,100dvh - 32px);max-height:calc(100dvh - 32px);padding:0;overflow:hidden}.model-catalog-dialog::backdrop{-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);background:#1018287a}.catalog-dialog-shell{flex-direction:column;height:100%;min-height:0;display:flex}.catalog-dialog-header{border-bottom:1px solid var(--line);flex:none;justify-content:space-between;align-items:center;gap:12px;min-width:0;margin:0;padding:18px 24px;display:flex}.catalog-dialog-header h2{margin:0;font-size:clamp(20px,2.2vw,25px)}.catalog-dialog-body{overscroll-behavior:contain;flex:auto;min-height:0;padding:20px 24px 16px;overflow-y:auto}.catalog-dialog-body>p:first-child{color:var(--muted);margin:0 0 14px;line-height:1.6}.catalog-filters,.model-scope-controls{grid-template-columns:repeat(3,minmax(0,1fr));align-items:end;gap:12px;margin-bottom:12px;display:grid}.catalog-filters label,.model-scope-controls label{min-width:0;color:var(--muted);gap:7px;font-size:13px;display:grid}.catalog-filters select,.catalog-filters input,.model-scope-controls select,.model-scope-controls input{border:1px solid var(--control-line);background:var(--surface);width:100%;min-width:0;min-height:44px;color:var(--ink);border-radius:12px;padding:9px 12px}.model-scope-selector{min-width:0;margin:18px 0}.model-scope-summary{flex-wrap:wrap;align-items:center;gap:6px 16px;margin-bottom:12px;font-size:13px;display:flex}.model-scope-toolbar{flex-wrap:wrap;align-items:center;gap:8px;margin:12px 0;display:flex}.model-scope-toolbar button{min-height:40px;padding:8px 12px}.model-scope-only{white-space:nowrap;margin-right:auto}.model-scope-selector .setting-note{color:var(--muted);margin:8px 0 12px;font-size:12px}.model-scope-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;min-height:80px;max-height:330px;padding:2px;display:grid;overflow-y:auto}.model-scope-item{background:var(--surface);border:1px solid var(--line);cursor:pointer;border-radius:12px;gap:10px;min-width:0;padding:11px 12px;display:flex}.model-scope-item.is-selected{background:var(--selection);border-color:#bdd7f7}.model-scope-item input{flex:none;align-self:start;margin-top:3px}.model-scope-item span{gap:4px;min-width:0;display:grid}.model-scope-item strong,.model-scope-item small{overflow-wrap:anywhere}.model-scope-item strong{font-size:13px}.model-scope-item small{color:var(--muted);font-size:11px}.catalog-metadata article{min-width:0}.catalog-actions{padding:14px 24px calc(14px + env(safe-area-inset-bottom,0px));border-top:1px solid var(--line);background:var(--surface);flex:none;justify-content:flex-end;align-items:center;gap:10px;margin:0;display:flex;position:static}.catalog-actions button{min-height:44px}@media (max-width:900px){.admin-root .admin-workspace-layout,.resource-workspace .admin-workspace-layout{grid-template-columns:minmax(0,1fr)}.admin-root .admin-settings-nav,.resource-workspace .admin-settings-nav{grid-template-columns:1fr;gap:8px;max-height:none;padding:12px;display:grid;position:static;overflow:visible}.admin-nav-title{padding:2px 5px 8px}.admin-nav-section{min-width:0}.admin-nav-heading{padding:4px 5px}.admin-nav-links{scrollbar-width:thin;gap:8px;padding-bottom:6px;display:flex;overflow-x:auto}.admin-settings-nav .admin-nav-links a{flex:none;min-width:135px;min-height:58px}}@media (max-width:620px){.admin-root,.resource-workspace{padding-inline:16px}.model-catalog-dialog{border-radius:16px;width:calc(100vw - 12px);height:calc(100dvh - 12px);max-height:calc(100dvh - 12px)}.catalog-dialog-header,.catalog-dialog-body{padding:14px 16px}.catalog-filters,.model-scope-controls{grid-template-columns:minmax(0,1fr);gap:10px}.catalog-filters label,.model-scope-controls label{font-size:12px}.model-scope-grid{grid-template-columns:minmax(0,1fr);max-height:38dvh}.model-scope-toolbar{align-items:stretch}.model-scope-toolbar button{flex:auto}.catalog-actions{padding:12px 16px calc(12px + env(safe-area-inset-bottom,0px));flex-wrap:wrap}.catalog-actions>button{flex:140px}}
