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@media(min-width:1500px){.content-grid{grid-template-columns:minmax(0,1fr) 300px}.question-card{padding:25px}.hero-art{margin-right:50px}}
@media(max-width:1200px){.sidebar{width:205px;padding:30px 18px}.workspace{margin-left:205px}main{padding:30px 28px 40px}.topbar{padding:0 28px}.content-grid{grid-template-columns:minmax(0,1fr) 235px;gap:20px}.tabs{gap:17px}.tabs button{font-size:11px}.question-card{padding:18px}.local-label{display:none}.hero-art{width:130px}.plan-panel{padding:20px}.mock-layout{grid-template-columns:minmax(0,1fr) 275px}.paper-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:960px){.sidebar{width:170px;padding:26px 12px}.brand{gap:8px;font-size:9px;letter-spacing:1px}.brand b{font-size:12px}.brand-icon{width:39px;height:43px;line-height:43px;font-size:30px}.workspace{margin-left:170px}.sidebar nav>a{font-size:12px;padding:10px}.sidebar-note{padding:17px 12px}.sidebar-bottom{font-size:8px}.sidebar-label{font-size:8px;letter-spacing:1px}.content-grid{grid-template-columns:minmax(0,1fr)}.side-column{display:grid;grid-template-columns:1fr 1fr}.plan-panel{position:static}.source-panel{grid-column:1/-1}.hero-art{display:none}h1{font-size:28px}.metric{padding:15px;gap:10px}.metric-icon{width:30px;height:33px;font-size:16px}.metric strong{font-size:21px}.mock-layout{grid-template-columns:1fr}.mock-settings{order:-1}.exam-grid{grid-template-columns:1fr}.exam-nav{display:flex;gap:5px;overflow:auto;padding:12px;align-items:center}.exam-nav-title{display:none}.exam-nav button{min-width:120px;width:auto;flex-shrink:0}.exam-top{align-items:flex-start}.exam-controls{gap:12px}.exam-top h1{font-size:20px}.pdf-wrapper iframe{height:480px}}
@media(max-width:650px){.sidebar{position:static;width:auto;padding:17px 18px 0;border-right:0;border-bottom:1px solid var(--line)}.brand{font-size:9px;letter-spacing:2px;gap:9px;width:max-content}.brand b{font-size:12px;letter-spacing:2px}.brand-icon{height:34px;width:33px;line-height:34px;font-size:26px;border-radius:7px}.brand-icon span{font-size:8px;right:4px}.sidebar-label,.sidebar-note,.sidebar-bottom{display:none}.sidebar nav{display:flex;justify-content:space-between;gap:4px;margin-top:17px}.sidebar nav>a{padding:9px 8px;border-radius:7px 7px 0 0;font-size:11px;gap:6px;min-height:40px}.nav-icon{font-size:18px;width:auto}.nav-dot{display:none}.small-count{font-size:9px;padding:0 4px}.workspace{margin-left:0}.topbar{height:50px;padding:0 20px}.breadcrumb{font-size:10px}.breadcrumb span{padding:0 8px}.edition{font-size:8px;padding:3px 6px}.resume-pill{font-size:8px;padding:3px 5px}.topbar-right{gap:8px}main{padding:27px 19px 35px}.eyebrow{font-size:8px;letter-spacing:1.6px;margin-bottom:10px}h1{font-size:25px;letter-spacing:-.8px}.hero{margin-bottom:23px}.hero p{font-size:11px;margin-top:9px}.metrics{gap:8px;margin-bottom:26px}.metric{display:block;padding:13px 10px}.metric-icon{display:none}.metric strong{font-size:22px}.metric strong small{font-size:9px;margin-left:4px}.metric p{font-size:8px;margin-top:6px;white-space:nowrap}.tabs{gap:0;justify-content:space-between}.tabs button{font-size:10px;padding-bottom:11px}.tabs .num{display:none}.section-heading h2{font-size:16px}.section-heading .hint{font-size:9px}.filters{gap:6px;flex-wrap:wrap}.filters select{max-width:none;font-size:10px;flex:1}.search-field{flex-basis:100%}.filter-meta{font-size:9px}.question-card{padding:17px}.question-title{font-size:15px}.question-desc{font-size:10px;margin-bottom:14px}.card-head{gap:7px}.card-bottom{gap:5px}.tag{font-size:8px;padding:3px 5px}.card-actions{gap:9px}.practice-button{font-size:10px}.plan-panel h3{font-size:19px}.side-column{grid-template-columns:1fr}.side-tip{display:none}.source-panel{padding:0 3px}.plan-panel{display:grid;grid-template-columns:1fr 1fr;gap:0 25px}.plan-panel>.eyebrow{grid-column:1/-1}.plan-panel h3{grid-column:1;margin-top:0}.plan-panel>p:not(.bottom-caption){grid-column:1;grid-row:3}.plan-panel .plan-count{grid-column:2;grid-row:2 / span 2;margin:0 0 10px;border-top:0;border-bottom:0;align-items:center;justify-content:center}.plan-panel>.btn{grid-column:1/-1;margin-top:17px}.plan-panel .bottom-caption{grid-column:1/-1}.paper-grid{gap:11px}.paper-cover{padding:18px 15px;min-height:125px}.paper-cover strong{font-size:32px}.paper-info{padding:15px 12px}.paper-info h3{font-size:11px}.paper-info p{font-size:9px}.paper-actions{flex-direction:column}.paper-icon{font-size:25px}.papers-toolbar{gap:8px;flex-wrap:wrap}.papers-toolbar select{font-size:10px;padding:7px}.panel{padding:20px}.mock-layout{gap:16px}.exam-top{flex-direction:column;gap:18px}.exam-controls{width:100%;justify-content:space-between}.timer{font-size:27px}.reader-dialog{width:100vw;height:100vh;height:100dvh;border-radius:0}.reader-head{padding:18px;gap:10px}.reader-head h2{font-size:16px;line-height:1.5}.reader-head p{font-size:10px}.reader-actions{align-items:flex-start}.reader-actions>.btn{display:none}.reader-body{padding:17px}.reader-toolbar{align-items:flex-start}.reader-toolbar .eyebrow{font-size:8px}.pdf-wrapper iframe{height:440px}.pdf-support{font-size:9px;display:block}.pdf-support a{margin-left:5px}.answer-control{gap:9px;flex-wrap:wrap}.answer-control p{font-size:9px}.answer-panel{padding:12px}.answer-panel .pdf-wrapper iframe{height:450px}.record{padding:16px;gap:12px;flex-wrap:wrap}.record-icon{width:33px;height:33px;flex-shrink:0}.record-content h3{font-size:12px}.record-content p{font-size:9px}.record .btn{padding:7px 10px;min-height:32px}.result-hero{padding:23px}.result-hero h1{font-size:22px}.result-stats{gap:24px}.result-stats strong{font-size:20px}.toast{left:50%;font-size:11px}footer{padding:19px;flex-wrap:wrap;gap:9px;font-size:8px}footer>span:first-child{display:none}.pagination{font-size:9px}.pagination button{font-size:10px;padding:6px 9px}.pagination .page-numbers{gap:4px}.page-subtitle{font-size:11px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.star-button{font-size:19px;color:#bbc0cb;line-height:1;padding:0 0 0 4px}.star-button:hover,.star-button.on{color:#b69c48}.reader-study-tools{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}.tool-button{border:1px solid #dce2e9;border-radius:6px;padding:6px 11px;font-size:10px;background:white;color:#8490a0}.tool-button.active{background:#faf5df;border-color:#e7dca9;color:#9d853c}.tool-button.mistake-active{background:#fcf0ed;border-color:#f0d5cd;color:#ad7c6d}.mistake-tag{background:#fcf0ed;color:#b58073}.untimed-label{font-size:9px;padding:2px 7px;background:#eef3e4;color:#87976b;border-radius:4px;margin-left:5px}.mistake-editor{padding:20px;background:#faf5f2;border:1px solid #eddfd6;border-radius:10px;margin-top:22px}.mistake-editor h3{font-size:13px}.mistake-editor textarea{min-height:80px;resize:vertical;font-size:12px;line-height:1.8}.attachment-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:20px 0 12px}.attachment-top h4{margin:0 0 5px;font-size:12px;font-weight:500}.attachment-top p{font-size:9px;color:#a2958c}.upload-label{position:relative;overflow:hidden;cursor:pointer;flex-shrink:0;font-size:10px}.upload-label input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer}.upload-label:focus-within{outline:3px solid #7f89c8;outline-offset:3px}.attachment-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.attachment-empty{grid-column:1/-1;border:1px dashed #e0d1c5;border-radius:7px;text-align:center;color:#b0a195;font-size:11px;padding:30px 12px}.attachment{margin:0;border:1px solid #e3dbd3;border-radius:8px;overflow:hidden;background:white}.attachment>a{display:block;height:140px;background:#eeeae5}.attachment img{height:100%;width:100%;object-fit:contain}.attachment figcaption{display:flex;align-items:center;gap:7px;padding:8px 10px;font-size:9px}.attachment figcaption span{white-space:nowrap;text-overflow:ellipsis;overflow:hidden;flex:1;color:#92908c}.attachment figcaption button{font-size:17px;color:#a18d83;flex-shrink:0}.collection-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.note-excerpt{margin-top:-7px;position:relative;border:1px solid var(--line);border-top:0;background:#f1f3ec;border-radius:0 0 12px 12px;padding:18px;font-size:11px;line-height:1.9;color:#8a9480;white-space:pre-wrap;overflow-wrap:anywhere;max-height:220px;overflow:auto}.note-excerpt .text-button{display:block;margin-top:12px;color:#74885f}.viewer-origin{font-size:9px;color:#98a1ac;margin:7px 1px 12px}.viewer-origin a{color:#8191a5;text-decoration:underline}.settings-divider{border-top:1px solid var(--line);margin:22px 0}.sidebar-label{margin-top:38px}.sidebar nav{gap:5px}.sidebar-note{margin-top:25px}.sidebar-bottom{margin-top:auto;padding-top:20px}.reader-toolbar{scroll-margin-top:120px}.answer-panel{scroll-margin-top:130px}
@media(max-height:850px) and (min-width:651px){.sidebar-note{display:none}.sidebar-label{margin-top:38px}.sidebar nav>a{min-height:46px}.sidebar-bottom{margin-top:auto}}
@media(max-width:960px){.collection-grid{grid-template-columns:1fr}.sidebar nav>a{min-height:42px;font-size:11px}.sidebar-label{margin-top:35px}}
@media(max-width:650px){.sidebar nav{overflow-x:auto;justify-content:flex-start;gap:5px;scrollbar-width:none}.sidebar nav>a{white-space:nowrap;flex-shrink:0;padding:9px 10px}.sidebar nav::-webkit-scrollbar{display:none}.sidebar-bottom{display:none}.attachment-top{flex-direction:column;align-items:flex-start}.attachment-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.attachment>a{height:120px}.mistake-editor{padding:15px}.tool-button{font-size:9px;padding:6px 9px}.star-button{font-size:19px}.viewer-origin{font-size:8px}}
.hero h1{font-size:26px;font-weight:600;letter-spacing:0}.hero p{margin-top:7px}.hero{margin-bottom:23px}.brand-chinese{font-size:12px;letter-spacing:1px}.brand-chinese b{font-size:18px;letter-spacing:2px}.sidebar-label{letter-spacing:1px}.plan-panel h3{font-size:19px}.eyebrow{letter-spacing:1px}.metrics{margin-bottom:25px}.plan-panel>p{font-size:11px}.hero-art{display:none}.hero h1 .serif{font-family:inherit;font-style:normal}.plan-panel .eyebrow{font-size:10px}
/* Account controls share the library's existing visual language. */
.account-button{border:1px solid #cdd5ce;border-radius:8px;background:white;color:#243348;padding:8px 12px;font:inherit;font-size:13px;cursor:pointer;white-space:nowrap}.account-button:hover{background:#edf1e5}.account-dialog{width:min(480px,calc(100vw - 32px));max-height:90dvh;border:1px solid #d8ded6;border-radius:16px;padding:28px;color:#263345;background:#fff;box-shadow:0 20px 80px #17212d30}.account-dialog::backdrop{background:#18222e66}.account-dialog h2{font-size:23px;margin:0}.account-dialog p{line-height:1.7}.account-dialog form{display:grid;gap:16px;margin-top:22px}.account-dialog label{display:grid;gap:8px;font-size:14px}.account-dialog input{box-sizing:border-box;width:100%;min-height:44px;border:1px solid #ccd5ca;border-radius:7px;padding:10px 12px;font:inherit;background:#fafbf8;color:#223047}.account-dialog input:focus{outline:2px solid #728264;outline-offset:2px}.account-links{display:flex;gap:18px;margin:20px 0}.account-actions{display:grid;gap:12px;margin:22px 0}.account-name{font-size:20px;font-weight:700}.account-error{color:#9c3729;min-height:1em;font-size:14px;margin:0}.sync-detail{padding:12px;background:#f1f4ec;border-radius:8px;font-size:14px;overflow-wrap:anywhere}.recovery-code{font-family:ui-monospace,monospace;white-space:pre-wrap;overflow-wrap:anywhere;background:#eff3e9;border-radius:8px;padding:16px;font-size:15px;line-height:1.8;user-select:all}.account-dialog button:disabled{opacity:.6;cursor:wait}.attachment>span{display:grid;place-items:center;min-height:100px;padding:10px;font-size:12px}.topbar-right{flex-wrap:wrap}@media(max-width:640px){.account-dialog{padding:20px}.account-button{padding:7px 10px}.topbar .edition{display:none}.topbar #sync-status{display:none}}