/*! tailwindcss v4.2.1 | MIT License | https://tailwindcss.com */
@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}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{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.relative{position:relative}.start{inset-inline-start:var(--spacing)}.table{display:table}}:root{--ink:#202438;--muted:#7b8091;--paper:#f7f7f3;--line:#e7e7df;--purple:#5c6bea}*{box-sizing:border-box}body{background:var(--paper);color:var(--ink);margin:0;font-family:Arial,PingFang SC,Microsoft YaHei,sans-serif}button{font:inherit}.shell{min-height:100vh}header{border-bottom:1px solid var(--line);background:#fff;justify-content:space-between;align-items:center;height:76px;padding:0 max(28px,50vw - 590px);display:flex}.brand{cursor:pointer;color:var(--ink);background:0 0;border:0;align-items:center;gap:9px;display:flex}.brand>span{color:#fff;background:var(--purple);border-radius:12px 12px 12px 3px;place-items:center;width:36px;height:36px;font-size:22px;font-weight:700;display:grid;transform:rotate(-3deg)}.brand b{letter-spacing:1px;font-size:23px}.brand small{color:#9a9dac;border-left:1px solid var(--line);padding-left:4px}nav{gap:34px;height:100%;display:flex}nav button{color:#777c8d;cursor:pointer;background:0 0;border:0;font-weight:600;position:relative}nav button.active{color:var(--ink)}nav button.active:after{content:"";background:var(--purple);border-radius:4px 4px 0 0;height:3px;position:absolute;bottom:0;left:25%;right:25%}.streak{align-items:center;gap:8px;display:flex}.streak>span{background:#fff3df;border-radius:10px;padding:8px}.streak div{flex-direction:column;font-size:12px;display:flex}.streak div small{color:#999}.streak i{color:#fff;background:#2e3349;border-radius:50%;place-items:center;width:36px;height:36px;margin-left:9px;font-size:11px;font-style:normal;display:grid}.welcome,.workspace,.book-page,.review-page,.upload-page{max-width:1180px;margin:auto}.welcome{justify-content:space-between;align-items:flex-end;padding:50px 0 28px;display:flex}.eyebrow{letter-spacing:2px;font-weight:700;color:var(--purple)!important;margin:0 0 9px!important;font-size:11px!important}.welcome h1,.page-title h1,.review-page h1,.upload-heading h1{margin:0;font:700 34px/1.25 Georgia,Songti SC,serif}.welcome h1 span{font-family:Arial}.welcome p,.page-title p,.review-page>p,.upload-heading p{color:var(--muted);margin:10px 0 0;font-size:14px}.today{background:#eeefe9;border-radius:16px;grid-template-columns:1fr auto;align-items:end;width:210px;padding:15px 18px;display:grid}.today span{color:#707568;font-size:12px}.today b{font-size:22px}.today b small{color:#999;font-size:12px}.today div{background:#d9dbd3;border-radius:5px;grid-column:1/3;height:5px;margin-top:10px;overflow:hidden}.today i{background:#747d62;border-radius:5px;height:100%;display:block}.workspace{grid-template-columns:minmax(0,2fr) minmax(280px,1fr);gap:25px;padding-bottom:60px;display:grid}.quiz-card,.side-card,.book-page article,.review-grid article{border:1px solid var(--line);background:#fff;box-shadow:0 10px 30px #1f24380a}.quiz-card{border-radius:22px;padding:28px 34px}.quiz-head{border-bottom:1px solid var(--line);align-items:center;gap:10px;padding-bottom:18px;display:flex}.quiz-head span{background:#eef0ff;border-radius:9px;padding:7px 12px;font-weight:700}.quiz-head p{color:var(--muted);font-size:13px}.quiz-head em{color:#a4a7b1;margin-left:auto;font-size:13px;font-style:normal}.question-no{color:#acaeae;letter-spacing:2px;margin-top:26px;font-size:10px}.quiz-card h2{margin:10px 0 24px;font-size:21px;font-weight:650}.options{gap:10px;display:grid}.options button{border:1px solid var(--line);cursor:pointer;color:#4b4f60;text-align:left;background:#fff;border-radius:12px;align-items:center;gap:14px;height:52px;padding:0 15px;display:flex}.options button:hover,.options button.selected{border-color:var(--purple);background:#f5f6ff}.options button i{border:1px solid #d8d9df;border-radius:8px;place-items:center;width:27px;height:27px;font-size:12px;font-style:normal;display:grid}.options button b{margin-left:auto;font-size:20px}.options button.correct{color:#197550;background:#effaf5;border-color:#65b994}.options button.wrong{color:#b74c3c;background:#fff2ef;border-color:#e68472}.feedback{background:#fff3ef;border-left:3px solid #ef745b;border-radius:8px;margin-top:14px;padding:14px 17px}.feedback.good{background:#effaf5;border-color:#25a487}.feedback b{font-size:13px}.feedback p{color:#666c7c;margin:5px 0 0;font-size:13px;line-height:1.6}.quiz-actions{justify-content:space-between;align-items:center;margin-top:22px;display:flex}.quiz-actions button{cursor:pointer;border:0}.skip{color:#9295a1;background:0 0}.check{background:var(--ink);color:#fff;border-radius:11px;padding:13px 22px}.check span{padding-left:18px}.check:disabled{opacity:.35;cursor:not-allowed}.dashboard-empty{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:420px;display:flex}.dashboard-empty>i{width:58px;height:58px;color:var(--purple);background:#e9ebff;border-radius:17px;place-items:center;font-size:30px;font-style:normal;display:grid}.dashboard-empty h2{margin:18px 0 7px}.dashboard-empty p{color:#898d9b;max-width:370px;font-size:13px;line-height:1.7}.dashboard-empty button,.empty-list button{background:var(--ink);color:#fff;cursor:pointer;border:0;border-radius:10px;margin-top:14px;padding:11px 18px}aside{flex-direction:column;gap:20px;display:flex}.side-card{border-radius:18px;padding:22px}.side-title{justify-content:space-between;align-items:center;display:flex}.side-title span{font-weight:700}.side-title small{color:#3c9b73;background:#edf8f2;border-radius:6px;padding:5px 7px}.side-title button{color:var(--purple);cursor:pointer;background:0 0;border:0;font-size:11px}.big-stat{margin:18px 0;font:700 34px Georgia,serif}.big-stat small{color:#999;font:12px Arial}.mini-stats{background:#f7f7f4;border-radius:12px;grid-template-columns:repeat(3,1fr);padding:13px 3px;display:grid}.mini-stats div{border-right:1px solid #e5e5df;flex-direction:column;align-items:center;display:flex}.mini-stats div:last-child{border:0}.mini-stats b{font-size:16px}.mini-stats small{color:#999;margin-top:4px;font-size:10px}.weak{grid-template-columns:90px 1fr 42px;align-items:center;gap:8px;margin-top:21px;font-size:11px;display:grid}.weak b{font-size:12px}.weak span{background:#eee;border-radius:5px;height:5px;overflow:hidden}.weak i{background:var(--purple);border-radius:5px;height:100%;display:block}.weak em{color:#999;font-style:normal}.empty-side{min-height:140px}.empty-side>p{color:#a1a4ae;place-items:center;min-height:70px;font-size:11px;display:grid}.book-page,.review-page{padding:52px 0 70px}.page-title{justify-content:space-between;align-items:end;display:flex}.book-stat{background:#e9ebfa;border-radius:14px;grid-template-columns:auto 1fr;align-items:end;width:210px;padding:14px 18px;display:grid}.book-stat b{grid-row:1/3;margin-right:10px;font:700 36px Georgia,serif}.book-stat span{font-weight:700}.book-stat small{color:#777b91}.filters{gap:9px;margin:34px 0 18px;display:flex}.filters button{border:1px solid var(--line);color:#717583;cursor:pointer;background:#fff;border-radius:10px;padding:9px 16px}.filters button.active{background:var(--ink);color:#fff;border-color:var(--ink)}.filters small{opacity:.65;margin-left:7px}.mistake-list{gap:12px;display:grid}.book-page article{border-radius:16px;align-items:flex-start;gap:16px;padding:20px;display:flex}.book-page article.mastered{opacity:.66}.subject-mark{color:#fff;border-radius:10px;flex:none;place-items:center;width:38px;height:38px;font-weight:700;display:grid}.mistake-main{flex:1}.mistake-main>div{color:#8e919e;font-size:11px}.mistake-main time{margin-left:12px}.mistake-main h3{margin:8px 0;font-size:16px}.mistake-main p{color:#6f7381;margin:0;font-size:12px;line-height:1.6}.master-btn{border:1px solid var(--line);cursor:pointer;color:#656979;background:#fafaf7;border-radius:9px;padding:8px 12px;font-size:11px}.empty-list{text-align:center;border:1px solid var(--line);background:#fff;border-radius:18px;flex-direction:column;justify-content:center;align-items:center;min-height:300px;display:flex}.empty-list i{color:#b5b8c1;border:2px solid #d9dbe2;border-radius:50%;place-items:center;width:50px;height:50px;margin-bottom:14px;font-size:21px;font-style:normal;display:grid}.empty-list p{color:#9195a2;font-size:12px}.review-empty{margin-top:30px}.review-page>p{margin-top:10px}.review-grid{grid-template-columns:repeat(3,1fr);gap:18px;margin-top:36px;display:grid}.review-grid article{border-radius:18px;padding:25px}.review-grid article>span{color:#aeb1bc;font:24px Georgia,serif}.review-grid b{margin-top:25px;font-size:18px;display:block}.review-grid p{color:#888c99;font-size:12px}.review-grid button{border:0;border-bottom:1px solid var(--ink);cursor:pointer;background:0 0;margin-top:18px;padding:0 0 3px;font-weight:700}.toast{color:#fff;background:#202438;border-radius:12px;padding:14px 20px;animation:.25s ease-out pop;position:fixed;bottom:28px;right:28px;box-shadow:0 12px 30px #0003}.upload-page{padding:50px 0 70px}.upload-heading{justify-content:space-between;align-items:end;display:flex}.privacy-note{background:#edf8f2;border:1px solid #d7eee2;border-radius:13px;flex-direction:column;padding:13px 17px;display:flex}.privacy-note b{color:#1c805d;font-size:13px}.privacy-note span{color:#6b8a7e;margin-top:3px;font-size:11px}.upload-workspace{grid-template-columns:1.05fr .95fr;gap:20px;margin-top:30px;display:grid}.upload-card,.result-card{border:1px solid var(--line);background:#fff;border-radius:20px;padding:24px;box-shadow:0 10px 30px #1f24380a}.upload-controls{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.upload-controls label{font-size:12px;font-weight:700}.upload-controls select{border:1px solid var(--line);background:#fafaf7;border-radius:8px;margin-left:9px;padding:7px 28px 7px 10px}.upload-controls>span{color:#999da9;font-size:10px}.drop-zone{cursor:pointer;background:#fafaf7;border:1.5px dashed #cfd2dd;border-radius:16px;place-items:center;min-height:330px;display:grid;position:relative;overflow:hidden}.drop-zone:hover{border-color:var(--purple);background:#f8f8ff}.drop-zone input{opacity:0;pointer-events:none;position:absolute}.drop-zone>div{text-align:center}.drop-zone i{width:52px;height:52px;color:var(--purple);background:#e9ebff;border-radius:15px;place-items:center;margin:0 auto 14px;font-size:28px;font-style:normal;display:grid}.drop-zone b{display:block}.drop-zone p{color:#888c99;margin:7px 0;font-size:12px}.drop-zone small{color:#b0b2bc}.drop-zone.has-image{background:#f1f1ed}.drop-zone img{object-fit:contain;width:100%;height:330px}.upload-actions{justify-content:flex-end;gap:10px;margin-top:17px;display:flex}.upload-actions button{cursor:pointer;border-radius:10px;padding:11px 17px}.replace-btn{border:1px solid var(--line);color:#6e7280;background:#fff}.grade-btn{background:var(--ink);color:#fff;border:0}.grade-btn:disabled{opacity:.35;cursor:not-allowed}.demo-disclaimer{border-top:1px solid var(--line);color:#999da8;margin:13px 0 0;padding-top:12px;font-size:10px;line-height:1.6}.result-title{border-bottom:1px solid var(--line);justify-content:space-between;padding-bottom:17px;display:flex}.result-title span{color:#21805f;background:#edf8f2;border-radius:7px;padding:5px 9px;font-size:11px}.empty-result{color:#8f929e;text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:390px;display:flex}.empty-result i{color:#c2c4cb;border:2px solid #d9dbe2;border-radius:50%;place-items:center;width:50px;height:50px;margin-bottom:13px;font-size:22px;font-style:normal;display:grid}.empty-result b{color:#777b88}.empty-result p{max-width:230px;font-size:11px;line-height:1.6}.graded-list{gap:10px;max-height:400px;margin-top:16px;display:grid;overflow:auto}.graded-list article{background:#f7f7f4;border-radius:12px;grid-template-columns:30px 1fr auto;align-items:start;gap:11px;padding:14px;display:grid}.graded-list article.is-wrong{background:#fff4f1}.grade-icon{color:#18815d;background:#dff4e9;border-radius:8px;place-items:center;width:27px;height:27px;font-weight:700;display:grid}.is-wrong .grade-icon{color:#c8513d;background:#ffe0d9}.graded-list span{color:#8d919d;font-size:10px}.graded-list h3{margin:5px 0;font-size:13px}.graded-list p,.graded-list small{color:#777b88;font-size:10px;line-height:1.5}.graded-list em{color:#c8513d;white-space:nowrap;font-size:9px;font-style:normal}.upload-steps{background:#ebece7;border-radius:16px;grid-template-columns:repeat(4,1fr);margin-top:20px;padding:18px;display:grid}.upload-steps div{border-right:1px solid #d8d9d4;grid-template-columns:31px 1fr;align-items:center;padding:0 18px;display:grid;position:relative}.upload-steps div:last-child{border:0}.upload-steps i{width:26px;height:26px;color:var(--purple);background:#fff;border-radius:8px;grid-row:1/3;place-items:center;font-size:11px;font-style:normal;font-weight:700;display:grid}.upload-steps b{font-size:12px}.upload-steps span{color:#8c908e;font-size:9px}@keyframes pop{0%{opacity:0;transform:translateY(12px)}}@media (width<=850px){header{padding:0 18px}.brand small,.streak div,nav button:nth-child(4){display:none}nav{gap:10px}.welcome,.workspace,.book-page,.review-page,.upload-page{margin:0 18px}.welcome{padding-top:30px}.workspace,.upload-workspace{grid-template-columns:1fr}aside{grid-template-columns:1fr 1fr;display:grid}.review-grid{grid-template-columns:1fr}.page-title{align-items:flex-start}.book-stat{width:auto}.book-page article{flex-wrap:wrap}.master-btn{margin-left:54px}.quiz-card{padding:22px}.today{display:none}.upload-steps{grid-template-columns:1fr 1fr;gap:16px}.upload-steps div:nth-child(2){border:0}}@media (width<=560px){header{height:64px}.brand b{font-size:19px}nav{gap:1px}nav button{padding:0 5px;font-size:11px}.streak{display:none}.welcome h1,.page-title h1,.review-page h1,.upload-heading h1{font-size:28px}.workspace{margin:0 12px}.welcome{margin:0 16px}.quiz-card{border-radius:16px;padding:18px}.quiz-head p{display:none}aside{grid-template-columns:1fr}.page-title,.upload-heading{display:block}.privacy-note,.book-stat{margin-top:18px}.filters{overflow:auto}.book-page article{padding:15px}.mistake-main{min-width:calc(100% - 58px)}.upload-controls{flex-direction:column;align-items:flex-start;gap:10px}.upload-steps{grid-template-columns:1fr}.upload-steps div{border:0}.graded-list article{grid-template-columns:30px 1fr}.graded-list em{grid-column:2}.drop-zone{min-height:260px}.drop-zone img{height:260px}}
