*,:after,:before{--tw-border-spacing-x:0;--tw-border-spacing-y:0;--tw-translate-x:0;--tw-translate-y:0;--tw-rotate:0;--tw-skew-x:0;--tw-skew-y:0;--tw-scale-x:1;--tw-scale-y:1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness:proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-color:rgba(59,130,246,.5);--tw-ring-offset-shadow:0 0 #0000;--tw-ring-shadow:0 0 #0000;--tw-shadow:0 0 #0000;--tw-shadow-colored:0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }::backdrop{--tw-border-spacing-x:0;--tw-border-spacing-y:0;--tw-translate-x:0;--tw-translate-y:0;--tw-rotate:0;--tw-skew-x:0;--tw-skew-y:0;--tw-scale-x:1;--tw-scale-y:1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness:proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-color:rgba(59,130,246,.5);--tw-ring-offset-shadow:0 0 #0000;--tw-ring-shadow:0 0 #0000;--tw-shadow:0 0 #0000;--tw-shadow-colored:0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }/*
! tailwindcss v3.4.19 | MIT License | https://tailwindcss.com
*/*,:after,:before{box-sizing:border-box;border:0 solid #e5e7eb}:after,:before{--tw-content:""}:host,html{line-height:1.5;-webkit-text-size-adjust:100%;-moz-tab-size:4;-o-tab-size:4;tab-size:4;font-family:ui-sans-serif,system-ui,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji;font-feature-settings:normal;font-variation-settings:normal;-webkit-tap-highlight-color:transparent}body{line-height:inherit}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,pre,samp{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-feature-settings:normal;font-variation-settings:normal;font-size:1em}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}button,input,optgroup,select,textarea{font-family:inherit;font-feature-settings:inherit;font-variation-settings:inherit;font-size:100%;font-weight:inherit;line-height:inherit;letter-spacing:inherit;color:inherit;margin:0;padding:0}button,select{text-transform:none}button,input:where([type=button]),input:where([type=reset]),input:where([type=submit]){-webkit-appearance:button;background-color:transparent;background-image:none}:-moz-focusring{outline:auto}:-moz-ui-invalid{box-shadow:none}progress{vertical-align:baseline}::-webkit-inner-spin-button,::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}summary{display:list-item}blockquote,dd,dl,figure,h1,h2,h3,h4,h5,h6,hr,p,pre{margin:0}fieldset{margin:0}fieldset,legend{padding:0}menu,ol,ul{list-style:none;margin:0;padding:0}dialog{padding:0}textarea{resize:vertical}input::-moz-placeholder,textarea::-moz-placeholder{opacity:1;color:#9ca3af}input::placeholder,textarea::placeholder{opacity:1;color:#9ca3af}[role=button],button{cursor:pointer}:disabled{cursor:default}audio,canvas,embed,iframe,img,object,svg,video{display:block;vertical-align:middle}img,video{max-width:100%;height:auto}[hidden]:where(:not([hidden=until-found])){display:none}.mx-auto{margin-left:auto;margin-right:auto}.mt-2{margin-top:.5rem}.mt-6{margin-top:1.5rem}.inline{display:inline}.grid{display:grid}.min-h-screen{min-height:100vh}.max-w-5xl{max-width:64rem}.gap-4{gap:1rem}.rounded-2xl{border-radius:1rem}.bg-white{--tw-bg-opacity:1;background-color:rgb(255 255 255/var(--tw-bg-opacity,1))}.p-5{padding:1.25rem}.px-6{padding-left:1.5rem;padding-right:1.5rem}.py-8{padding-top:2rem;padding-bottom:2rem}.text-3xl{font-size:1.875rem;line-height:2.25rem}.text-sm{font-size:.875rem;line-height:1.25rem}.font-medium{font-weight:500}.font-semibold{font-weight:600}.text-slate-500{--tw-text-opacity:1;color:rgb(100 116 139/var(--tw-text-opacity,1))}.shadow-sm{--tw-shadow:0 1px 2px 0 rgba(0,0,0,.05);--tw-shadow-colored:0 1px 2px 0 var(--tw-shadow-color);box-shadow:var(--tw-ring-offset-shadow,0 0 #0000),var(--tw-ring-shadow,0 0 #0000),var(--tw-shadow)}:root{color-scheme:light;--ink:#17221d;--muted:#69746e;--line:#dde5e0;--green:#1d6b50;--green-dark:#14513d;--green-pale:#e8f2ed;--orange:#ed8c42;--paper:#f6f8f6}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Segoe UI,Microsoft YaHei,system-ui,sans-serif}button,input,select{font:inherit}a,button{-webkit-tap-highlight-color:transparent}a{text-decoration:none}a,button{color:inherit}.brand-lockup{display:inline-flex;align-items:center;gap:11px;font-size:23px;font-weight:800;letter-spacing:.06em}.brand-mark{display:grid;width:38px;height:38px;place-items:center;border-radius:11px;background:var(--green);color:#fff;font-family:serif;font-size:22px}.brand-lockup.compact{font-size:20px}.brand-lockup.compact .brand-mark{width:34px;height:34px;font-size:19px}.primary-button{min-height:50px;border:0;border-radius:12px;background:var(--green);color:#fff;font-weight:700;cursor:pointer;transition:transform .18s ease,background .18s ease,box-shadow .18s ease}.primary-button:hover{background:var(--green-dark);box-shadow:0 9px 24px rgba(29,107,80,.2);transform:translateY(-1px)}.primary-button:disabled{cursor:not-allowed;opacity:.45;transform:none;box-shadow:none}.primary-button.inline{display:inline-grid;min-width:128px;min-height:44px;padding:0 24px;place-items:center}.login-shell{display:grid;min-height:100vh;grid-template-columns:minmax(520px,1.1fr) minmax(420px,.9fr);background:#fff}.login-story{position:relative;display:flex;min-height:100vh;flex-direction:column;overflow:hidden;padding:42px clamp(42px,6vw,94px);background:#eaf1ed}.login-story:after{position:absolute;right:-150px;bottom:-230px;width:580px;height:580px;border:100px solid hsla(0,0%,100%,.46);border-radius:50%;content:""}.story-content{position:relative;z-index:1;margin:auto 0;max-width:670px;padding:52px 0}.story-grade{margin:0 0 18px;color:var(--green);font-size:15px;font-weight:750;letter-spacing:.08em}.story-content h1{margin:0;font-family:STKaiti,KaiTi,serif;font-size:clamp(44px,5.1vw,72px);font-weight:700;line-height:1.18;letter-spacing:-.025em}.story-content>p:not(.story-grade){max-width:590px;margin:26px 0 0;color:#56645d;font-size:17px;line-height:1.9}.progress-preview{max-width:580px;margin-top:42px;padding:24px 26px 20px;border:1px solid rgba(29,107,80,.11);border-radius:18px;background:hsla(0,0%,100%,.78);box-shadow:0 20px 50px rgba(37,64,51,.08);backdrop-filter:blur(10px)}.preview-topline{display:flex;justify-content:space-between;font-size:14px}.preview-topline strong{color:var(--green)}.preview-path{display:flex;align-items:center;margin-top:22px}.path-node{display:grid;width:31px;height:31px;flex:0 0 31px;place-items:center;border:2px solid #c8d2cc;border-radius:50%;background:#fff;color:#9aa49e;font-size:13px;font-weight:800}.path-node.done{border-color:var(--green)}.path-node.active,.path-node.done{background:var(--green);color:#fff}.path-node.active{border:7px solid #b9d6c8}.path-line{height:3px;flex:1;background:#d8dfdb}.path-line.done{background:var(--green)}.path-line.active{background:linear-gradient(90deg,var(--green),#d8dfdb)}.preview-labels{display:grid;margin-top:9px;grid-template-columns:repeat(4,1fr);color:#738078;font-size:11px;text-align:center}.deployment-note{position:relative;z-index:1;margin:0;color:#718078;font-size:13px}.login-panel{display:grid;min-height:100vh;place-items:center;padding:45px clamp(32px,6vw,82px)}.login-card{width:min(100%,470px)}.login-heading h2{margin:0;font-size:34px;letter-spacing:-.03em}.login-heading p{margin:10px 0 0;color:var(--muted)}.role-switch{display:grid;margin:32px 0 28px;grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--line)}.role-switch button{position:relative;padding:12px 4px 14px;border:0;background:transparent;color:#7a847f;font-size:14px;cursor:pointer}.role-switch button.selected{color:var(--green);font-weight:750}.role-switch button.selected:after{position:absolute;right:12px;bottom:-1px;left:12px;height:3px;border-radius:3px 3px 0 0;background:var(--green);content:""}.login-form{display:grid;gap:20px}.login-form>label{display:grid;gap:9px;font-size:14px;font-weight:700}.login-form input{width:100%;height:50px;padding:0 15px;border:1px solid #ccd6d0;border-radius:10px;outline:none;transition:border .18s,box-shadow .18s}.login-form input:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(29,107,80,.1)}.password-field{position:relative;display:block}.password-field input{padding-right:62px}.password-field button{position:absolute;top:0;right:6px;height:50px;border:0;background:transparent;color:var(--green);font-size:13px;cursor:pointer}.form-meta{display:flex;margin-top:-4px;align-items:center;justify-content:space-between;color:var(--muted);font-size:13px}.form-meta button{border:0;background:none;color:var(--green);cursor:pointer}.remember{display:flex;align-items:center;gap:6px;font-weight:400!important}.remember input{width:15px;height:15px;accent-color:var(--green)}.demo-divider{display:flex;margin:28px 0 14px;align-items:center;gap:14px;color:#9aa39e;font-size:12px}.demo-divider:after,.demo-divider:before{height:1px;flex:1;background:var(--line);content:""}.demo-tip{margin:0;color:#849089;font-size:12px;line-height:1.7;text-align:center}.login-error{margin:-4px 0 0;padding:10px 12px;border-radius:8px;background:#fff0ee;color:#9b493e;font-size:12px;line-height:1.5}.student-shell{min-height:100vh;background:#f4f7f5}.student-header{position:sticky;z-index:10;top:0;display:grid;height:72px;padding:0 max(28px,calc((100vw - 1240px)/2));align-items:center;border-bottom:1px solid #e0e7e3;background:hsla(0,0%,100%,.94);grid-template-columns:220px 1fr 260px;backdrop-filter:blur(12px)}.student-header nav{display:flex;height:100%;align-items:center;justify-content:center;gap:38px}.student-header nav a,.student-header nav button{position:relative;display:grid;height:100%;padding:0;place-items:center;border:0;background:transparent;color:#68736d;font-size:14px;cursor:pointer}.student-header nav .active{color:var(--green);font-weight:750}.student-header nav .active:after{position:absolute;right:0;bottom:0;left:0;height:3px;background:var(--green);content:""}.student-user{display:flex;align-items:center;justify-content:flex-end;gap:10px}.streak{padding:6px 10px;border-radius:9px;background:#fff2e8;color:#a5561b;font-size:12px;font-weight:700}.avatar{display:grid;width:38px;height:38px;place-items:center;border-radius:50%;background:#dcebe3;color:var(--green);font-weight:800}.student-user>span:last-child{display:grid}.student-user strong{font-size:13px}.student-user small{margin-top:2px;color:#89938e;font-size:10px}.student-content{width:min(1180px,calc(100% - 44px));margin:0 auto;padding:42px 0 70px}.welcome-row{display:flex;align-items:end;justify-content:space-between}.welcome-row p{margin:0 0 7px;color:var(--green);font-size:13px;font-weight:700}.welcome-row h1{margin:0;font-family:STKaiti,KaiTi,serif;font-size:34px}.grade-select{display:grid;gap:5px;color:var(--muted);font-size:11px}.grade-select select{min-width:160px;height:40px;padding:0 12px;border:1px solid var(--line);border-radius:9px;background:#fff;outline:none}.today-layout{display:grid;margin-top:30px;grid-template-columns:minmax(0,1.65fr) minmax(320px,.85fr);gap:20px}.continue-panel,.review-panel{border:1px solid #dce4df;border-radius:20px;background:#fff;box-shadow:0 8px 24px rgba(31,55,43,.045)}.continue-panel{display:grid;min-height:360px;overflow:hidden;grid-template-columns:1.15fr .85fr}.continue-copy{padding:34px 38px}.section-label{margin:0 0 12px!important;color:var(--green)!important;font-size:12px!important;font-weight:800!important;letter-spacing:.08em}.continue-copy>span{color:#7f8984;font-size:13px}.continue-copy h2{margin:8px 0 10px;font-size:30px;letter-spacing:-.02em}.continue-copy>p:not(.section-label){max-width:440px;margin:0;color:var(--muted);font-size:14px;line-height:1.7}.mastery-row{display:flex;margin-top:25px;justify-content:space-between;color:#647169;font-size:12px}.mastery-row strong{color:var(--green)}.chapter-progress,.wide-progress{height:7px;margin:8px 0 24px;overflow:hidden;border-radius:9px;background:#e7ece9}.chapter-progress i,.wide-progress i{display:block;height:100%;border-radius:inherit;background:var(--green)}.ruler-visual{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;overflow:hidden;background:#e8f1ec}.ruler-visual:before{position:absolute;width:320px;height:320px;border:56px solid hsla(0,0%,100%,.5);border-radius:50%;content:""}.measure-ring{position:relative;z-index:1;display:grid;width:122px;height:122px;place-items:center;align-content:center;border:12px solid #fff;border-radius:50%;background:var(--green);color:#fff;box-shadow:0 14px 32px rgba(29,107,80,.2)}.measure-ring strong{font:700 46px/1 Georgia,serif}.measure-ring small{margin-top:2px;font-weight:700}.ruler{position:relative;z-index:1;display:flex;width:210px;height:28px;margin-top:24px;justify-content:space-around;border-radius:4px;background:#e8ad50;box-shadow:0 5px 15px rgba(91,68,30,.14)}.ruler i{width:1px;height:12px;background:#815e28}.ruler i:nth-child(odd){height:18px}.ruler-visual p{position:relative;z-index:1;margin:16px 0 0;color:#557063;font:15px KaiTi,serif}.review-panel{padding:28px}.panel-heading{display:flex;align-items:start;justify-content:space-between}.panel-heading h2{margin:0;font-size:21px}.task-count{padding:7px 9px;border-radius:8px;background:#fff2e7;color:#aa5f27;font-size:12px;font-weight:750}.review-list{display:grid;margin-top:22px;gap:10px}.review-list button{display:grid;min-height:66px;padding:11px;align-items:center;border:1px solid #e4e9e6;border-radius:12px;background:#fbfcfb;grid-template-columns:36px 1fr auto;text-align:left;cursor:pointer}.review-list button:hover{border-color:#a9c8b8}.review-icon{display:grid;width:28px;height:28px;place-items:center;border-radius:50%;background:#e8f1ec;color:var(--green);font-weight:800}.review-list button>span:nth-child(2){display:grid;gap:4px}.review-list strong{font-size:13px}.review-list small{color:#929c96;font-size:10px}.review-list b{color:var(--green);font-size:11px}.review-note{margin:20px 0 0;color:#8a958f;font-size:11px;line-height:1.65}.chapter-section{margin-top:48px}.chapter-heading{display:flex;align-items:end;justify-content:space-between}.chapter-heading h2{margin:0;font-size:25px}.chapter-heading div>p:last-child{margin:7px 0 0;color:var(--muted);font-size:13px}.view-switch{display:flex;padding:4px;border:1px solid var(--line);border-radius:10px;background:#fff}.view-switch button{padding:8px 13px;border:0;border-radius:7px;background:transparent;color:#7b8780;font-size:12px;cursor:pointer}.view-switch button.active{background:#e7f0eb;color:var(--green);font-weight:700}.chapter-journey,.chapter-list-view{display:grid;margin-top:22px;gap:10px}.chapter-journey{grid-template-columns:repeat(5,1fr)}.chapter-node{display:grid;min-height:168px;padding:20px;border:1px solid var(--line);border-radius:16px;background:#fff;grid-template-columns:auto 1fr;gap:13px;transition:transform .18s,box-shadow .18s}.chapter-node:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(31,55,43,.07)}.chapter-index{display:grid;width:34px;height:34px;place-items:center;border-radius:10px;background:#edf1ef;color:#68746d;font-weight:800}.chapter-main>span{color:#8b958f;font-size:10px}.chapter-main h3{min-height:38px;margin:5px 0 13px;font-size:14px;line-height:1.4}.chapter-main .chapter-progress{margin:0;height:5px}.chapter-status{align-self:end;display:grid}.chapter-status strong{font-size:11px}.chapter-status span{color:#99a29d;font-size:10px}.chapter-node>a{align-self:end;justify-self:end;color:var(--green);font-size:11px;font-weight:700}.chapter-node.emerald .chapter-index{background:#dff0e7;color:#217053}.chapter-node.blue .chapter-index{background:#e4eef8;color:#356b9c}.chapter-node.orange .chapter-index{background:#fff0e4;color:#b66327}.chapter-node.violet .chapter-index{background:#eee8f6;color:#72549a}.chapter-list-view .chapter-node{min-height:82px;grid-template-columns:auto 1fr auto auto;align-items:center}.chapter-list-view .chapter-main h3{min-height:auto;margin-bottom:5px}.chapter-list-view .chapter-status{align-self:center;min-width:60px}.chapter-list-view .chapter-node>a{align-self:center}.mobile-tabbar{display:none}.practice-shell{min-height:100vh;padding-bottom:40px;background:#f1f5f2}.practice-header{display:grid;height:72px;padding:0 max(24px,calc((100vw - 960px)/2));align-items:center;border-bottom:1px solid var(--line);background:#fff;grid-template-columns:120px 1fr 120px}.practice-header>a{font-size:24px}.practice-header>div{display:grid;justify-items:center;gap:3px}.practice-header span{color:#8a958f;font-size:10px}.practice-header strong{font-size:15px}.practice-header button{border:0;background:none;color:var(--muted);font-size:12px;cursor:pointer}.practice-progress{position:relative;width:min(920px,calc(100% - 40px));height:7px;margin:24px auto;border-radius:8px;background:#dae3de}.practice-progress i{display:block;height:100%;border-radius:inherit;background:var(--green)}.practice-progress span{position:absolute;top:-8px;right:0;transform:translateY(-100%);color:var(--muted);font-size:11px}.question-card{width:min(820px,calc(100% - 40px));margin:48px auto 0;padding:clamp(28px,5vw,58px);border:1px solid var(--line);border-radius:22px;background:#fff;box-shadow:0 16px 42px rgba(30,55,43,.06)}.question-meta{display:flex;align-items:center;justify-content:space-between;color:#8c9691;font-size:11px}.question-meta span{color:var(--green);font-weight:750}.question-card h1{margin:28px 0 34px;font-size:clamp(22px,3vw,29px);line-height:1.65}.option-grid{display:grid;grid-template-columns:1fr 1fr;gap:13px}.option-grid button{display:flex;min-height:62px;padding:12px 18px;align-items:center;gap:15px;border:1px solid #dfe6e2;border-radius:12px;background:#fbfcfb;text-align:left;cursor:pointer;transition:border .15s,background .15s}.option-grid button span{display:grid;width:29px;height:29px;place-items:center;border:1px solid #cbd5d0;border-radius:50%;color:#78837d;font-size:12px;font-weight:750}.option-grid button.selected,.option-grid button:hover{border-color:var(--green);background:#edf5f1}.option-grid button.selected span{border-color:var(--green);background:var(--green);color:#fff}.option-grid button.correct{border-color:#3a8f68;background:#e9f6ef}.option-grid button.wrong{border-color:#d97567;background:#fff0ee}.question-actions{display:flex;margin-top:34px;align-items:center;justify-content:space-between}.question-actions>button:first-child{border:0;background:transparent;color:#99702f;font-size:13px;cursor:pointer}.answer-feedback{display:flex;margin:34px -58px -58px;padding:25px 58px;align-items:center;justify-content:space-between;border-radius:0 0 22px 22px}.answer-feedback.correct{background:#e7f4ed}.answer-feedback.wrong{background:#fff0ed}.answer-feedback strong{color:var(--green)}.answer-feedback p{max-width:550px;margin:6px 0 0;color:#607068;font-size:13px;line-height:1.7}.answer-feedback button{min-width:100px;min-height:40px;border:0;border-radius:9px;background:var(--green);color:#fff;font-weight:700;cursor:pointer}.practice-footnote{margin:20px auto;color:#8d9792;font-size:11px;text-align:center}@media (max-width:960px){.login-shell{grid-template-columns:1fr}.login-story{display:none}.login-panel{padding:32px 22px}.student-header{padding:0 22px;grid-template-columns:auto 1fr}.student-header nav{display:none}.student-user{justify-self:end}.streak{display:none}.today-layout{grid-template-columns:1fr}.continue-panel{grid-template-columns:1.2fr .8fr}.chapter-journey{grid-template-columns:repeat(2,1fr)}.mobile-tabbar{position:fixed;z-index:20;right:0;bottom:0;left:0;display:grid;height:62px;padding-bottom:env(safe-area-inset-bottom);border-top:1px solid var(--line);background:hsla(0,0%,100%,.96);grid-template-columns:repeat(4,1fr);backdrop-filter:blur(12px)}.mobile-tabbar a{display:grid;place-items:center;color:#7c8781;font-size:12px}.mobile-tabbar a.active{color:var(--green);font-weight:750}}@media (max-width:640px){.login-heading h2{font-size:29px}.role-switch{margin-top:24px}.student-header{height:62px}.student-user>span:last-child{display:none}.student-content{width:min(100% - 28px,1180px);padding-top:26px}.welcome-row{align-items:start}.welcome-row h1{font-size:25px}.welcome-row>div>p{display:none}.grade-select{font-size:0}.grade-select select{min-width:130px;height:36px;font-size:11px}.today-layout{margin-top:20px}.continue-panel{grid-template-columns:1fr}.continue-copy{padding:26px 23px}.continue-copy h2{font-size:25px}.ruler-visual{min-height:210px}.measure-ring{width:94px;height:94px;border-width:9px}.measure-ring strong{font-size:35px}.ruler{margin-top:15px}.review-panel{padding:23px}.chapter-heading{align-items:start}.chapter-heading div>p:last-child{display:none}.view-switch{margin-top:4px}.view-switch button{padding:7px 9px;font-size:10px}.chapter-journey{grid-template-columns:1fr}.chapter-node{min-height:110px;grid-template-columns:auto 1fr auto}.chapter-status{display:none}.chapter-node>a{align-self:center}.chapter-list-view .chapter-node{grid-template-columns:auto 1fr auto}.chapter-list-view .chapter-status{display:none}.practice-header{height:62px;padding:0 18px;grid-template-columns:60px 1fr 70px}.question-card{width:calc(100% - 24px);margin-top:30px;padding:25px 20px;border-radius:16px}.question-card h1{margin:22px 0 26px;font-size:20px}.option-grid{grid-template-columns:1fr}.answer-feedback{margin:28px -20px -25px;padding:20px;align-items:start;gap:18px;border-radius:0 0 16px 16px}.answer-feedback button{min-width:76px}.question-actions{align-items:stretch;gap:10px}.question-actions .primary-button{min-width:110px}}@media (prefers-reduced-motion:reduce){*,:after,:before{scroll-behavior:auto!important;transition-duration:.01ms!important}}.admin-shell{display:grid;min-height:100vh;grid-template-columns:240px 1fr;background:#f3f6f4}.admin-sidebar{position:sticky;top:0;display:flex;height:100vh;padding:30px 26px;flex-direction:column;border-right:1px solid var(--line);background:#173f32;color:#fff}.admin-sidebar .brand-mark{background:#fff;color:var(--green-dark)}.admin-sidebar nav{display:grid;margin-top:48px;gap:8px}.admin-sidebar nav a{padding:12px 14px;border-radius:9px;color:#c1d3ca;font-size:13px}.admin-sidebar nav a.active,.admin-sidebar nav a:hover{background:hsla(0,0%,100%,.11);color:#fff}.admin-sidebar>p{margin:auto 0 0;padding-top:20px;border-top:1px solid hsla(0,0%,100%,.13);font-size:12px}.admin-sidebar small{color:#9bb6a9}.admin-content{width:min(1100px,calc(100% - 70px));margin:0 auto;padding:48px 0 70px}.admin-content>header{display:flex;align-items:end;justify-content:space-between}.admin-content header p{margin:0 0 7px;color:var(--green);font-size:12px;font-weight:750}.admin-content header h1{margin:0;font-size:31px}.admin-content header>a{padding:11px 16px;border:1px solid var(--green);border-radius:9px;color:var(--green);font-size:12px;font-weight:700}.admin-notice{display:grid;margin-top:30px;padding:21px 24px;align-items:center;border-radius:14px;background:#e2eee8;grid-template-columns:180px 1fr 60px}.admin-notice strong{color:var(--green-dark)}.admin-notice span{color:#5f7168;font-size:13px}.admin-notice b{color:var(--green);text-align:right}.admin-module-section{margin-top:42px}.admin-module-section h2{font-size:20px}.admin-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.admin-grid article{min-height:210px;padding:24px;border:1px solid var(--line);border-radius:14px;background:#fff}.admin-grid article>span{color:#9cab9f;font:700 11px Georgia,serif}.admin-grid h3{margin:26px 0 8px;font-size:17px}.admin-grid p{min-height:42px;margin:0;color:var(--muted);font-size:12px;line-height:1.7}.admin-grid a{display:inline-block;margin-top:24px;color:var(--green);font-size:12px;font-weight:750}.ai-settings-shell{width:min(980px,calc(100% - 40px));margin:0 auto;padding:38px 0 70px}.ai-settings-shell>header{display:flex;align-items:center;gap:35px}.ai-settings-shell>header>a{color:var(--green);font-size:12px}.ai-settings-shell header p{margin:0;color:var(--green);font-size:11px;font-weight:700}.ai-settings-shell h1{margin:4px 0 0;font-size:29px}.ai-status-card{display:flex;margin-top:34px;padding:22px 24px;align-items:center;justify-content:space-between;border:1px solid var(--line);border-radius:14px;background:#fff}.ai-status-card>div{display:flex;align-items:center;gap:15px}.status-dot{width:12px;height:12px;border-radius:50%;background:#c7d0cb;box-shadow:0 0 0 7px #edf0ee}.status-dot.online{background:#35a170;box-shadow:0 0 0 7px #e4f4ec}.ai-status-card strong{font-size:14px}.ai-status-card p{margin:4px 0 0;color:var(--muted);font-size:11px}.ai-status-card button{padding:10px 16px;border:0;border-radius:9px;background:var(--green);color:#fff;font-size:12px;font-weight:700;cursor:pointer}.ai-status-card button:disabled{opacity:.45;cursor:not-allowed}.ai-message{margin:13px 0 0;padding:14px 18px;border-radius:10px;font-size:12px}.ai-message.error{background:#fff0ee;color:#98483d}.ai-message.success{background:#e7f5ed;color:#285e47}.ai-message p{margin:5px 0 0}.ai-settings-grid{display:grid;margin-top:18px;grid-template-columns:1fr 1fr;gap:16px}.ai-settings-grid>section,.env-guide{padding:27px;border:1px solid var(--line);border-radius:14px;background:#fff}.ai-settings-grid h2,.env-guide h2{margin:0 0 22px;font-size:19px}.ai-settings-grid dl{margin:0}.ai-settings-grid dl>div,.capability-list>div{display:flex;padding:12px 0;justify-content:space-between;border-bottom:1px solid #edf0ee;font-size:12px}.ai-settings-grid dt,.capability-list span{color:var(--muted)}.ai-settings-grid dd{max-width:240px;margin:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.capability-list{display:grid}.capability-list strong{max-width:210px;color:var(--green);font-size:11px;text-align:right}.env-guide{margin-top:16px}.env-guide pre{overflow-x:auto;padding:18px;border-radius:10px;background:#18231e;color:#dbe9e1;font:12px/1.8 Consolas,monospace}.env-guide>p:last-child{margin:15px 0 0;color:var(--muted);font-size:12px}@media(max-width:800px){.admin-shell{grid-template-columns:1fr}.admin-sidebar{position:static;height:auto;padding:18px 20px}.admin-sidebar nav,.admin-sidebar>p{display:none}.admin-content{width:calc(100% - 30px);padding-top:28px}.admin-grid{grid-template-columns:1fr 1fr}.admin-notice{grid-template-columns:1fr auto}.admin-notice span{display:none}.ai-settings-grid{grid-template-columns:1fr}}@media(max-width:540px){.admin-content header>a{display:none}.admin-grid{grid-template-columns:1fr}.admin-grid article{min-height:160px}.ai-settings-shell{width:calc(100% - 24px)}.ai-status-card{align-items:flex-start;gap:14px}.ai-status-card button{white-space:nowrap}.ai-settings-grid>section,.env-guide{padding:21px}}.organization-shell{width:min(1160px,calc(100% - 48px));margin:0 auto;padding:38px 0 70px}.organization-topbar{display:grid;align-items:center;grid-template-columns:140px 1fr auto;gap:24px}.organization-topbar>a{color:var(--green);font-size:12px}.organization-topbar p{margin:0;color:var(--green);font-size:11px;font-weight:750}.organization-topbar h1{margin:5px 0 0;font-size:29px}.organization-topbar label{display:grid;gap:5px;color:var(--muted);font-size:10px}.organization-topbar select{min-width:210px;height:40px;padding:0 11px;border:1px solid var(--line);border-radius:9px;background:#fff}.organization-error{padding:12px 16px;border-radius:10px;background:#fff0ee;color:#98483d;font-size:12px}.organization-summary{display:grid;margin-top:30px;overflow:hidden;border:1px solid var(--line);border-radius:14px;background:#fff;grid-template-columns:1.3fr repeat(3,1fr)}.organization-summary>div{display:grid;min-height:96px;padding:22px 25px;align-content:center;gap:7px;border-right:1px solid var(--line)}.organization-summary>div:last-child{border-right:0}.organization-summary span{color:var(--muted);font-size:11px}.organization-summary strong{font-size:22px}.organization-summary>div:first-child strong{color:var(--green);font-size:16px}.organization-columns{display:grid;margin-top:20px;grid-template-columns:1fr 1fr;gap:18px}.organization-columns>section{min-height:490px;padding:26px;border:1px solid var(--line);border-radius:14px;background:#fff}.organization-columns section>header{display:flex;align-items:start;justify-content:space-between}.organization-columns h2{margin:0;font-size:20px}.organization-columns section>header button{padding:9px 12px;border:1px solid #b8cec2;border-radius:8px;background:#edf4f0;color:var(--green);font-size:11px;font-weight:750;cursor:pointer}.inline-create-form{display:grid;margin:18px 0;padding:14px;border-radius:10px;background:#f1f5f3;grid-template-columns:1fr 100px 62px;gap:7px}.inline-create-form.class-form{grid-template-columns:1fr 1fr}.inline-create-form input,.inline-create-form select{width:100%;height:36px;padding:0 9px;border:1px solid #d1dbd5;border-radius:7px;background:#fff;font-size:11px}.inline-create-form button{border:0;border-radius:7px;background:var(--green);color:#fff;font-size:11px;font-weight:700;cursor:pointer}.organization-list{display:grid;margin-top:20px;gap:9px}.organization-list>p{color:var(--muted);font-size:12px}.organization-list article{display:grid;min-height:70px;padding:11px 12px;align-items:center;border:1px solid #e5eae7;border-radius:11px;background:#fbfcfb;grid-template-columns:40px 1fr auto;gap:11px}.org-number{display:grid;width:35px;height:35px;place-items:center;border-radius:9px;background:#e2f0e8;color:var(--green);font-weight:800}.org-number.class{background:#e8eef7;color:#386c9a}.organization-list article>div{display:grid;gap:4px}.organization-list article strong{font-size:13px}.organization-list article small{color:#8c9791;font-size:10px}.organization-list article>button{border:0;background:transparent;color:var(--green);font-size:11px;cursor:pointer}@media(max-width:800px){.organization-shell{width:calc(100% - 28px);padding-top:25px}.organization-topbar{grid-template-columns:1fr auto}.organization-topbar>a{display:none}.organization-columns{grid-template-columns:1fr}.organization-summary{grid-template-columns:1fr 1fr}.organization-summary>div{border-bottom:1px solid var(--line)}.organization-topbar select{min-width:150px}}@media(max-width:500px){.organization-topbar h1{font-size:23px}.organization-topbar label{font-size:0}.organization-summary>div{min-height:78px;padding:16px}.organization-columns>section{padding:20px}.inline-create-form,.inline-create-form.class-form{grid-template-columns:1fr}.inline-create-form button{height:36px}}@media (min-width:768px){.md\:grid-cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.md\:grid-cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}}