select.control{background:#fcfdff;border:1px solid #e0e6f0;border-radius:7px;padding:10px 12px;color:#394d6c;font-size:12px;min-height:39px}
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0}.search-mistakes{display:flex;gap:13px;align-items:center}.search-mistakes .search-input{max-width:230px}.pager{display:flex;justify-content:center;gap:15px;padding:17px;font-size:11px;align-items:center}.danger-note{color:#b56262!important}.file-count-note{color:#8c9eb6;font-size:10px}.loading{padding:70px;text-align:center;color:#7189ad}
@media(min-width:1500px){main{padding-top:45px}.files-select{gap:18px}.panel-body{padding:28px}.question-card{padding:40px 55px}}@media(max-width:1150px){.sidebar{width:205px;padding:28px 15px}.brand{font-size:20px;gap:9px}.brand small{font-size:8px}.workspace{margin-left:205px}main{padding:28px}.topbar{padding:0 28px}.setup-grid{grid-template-columns:1fr 250px;gap:17px}.panel-body{padding:21px}.start-panel{padding:22px}.stat{padding:18px 14px;gap:10px}.stat-icon{width:38px;height:40px}}@media(max-width:920px){.sidebar{width:180px;padding:25px 11px}.workspace{margin-left:180px}.brand{font-size:18px}.brand-mark{width:35px;height:38px;font-size:22px}.brand small{letter-spacing:0}.nav-item{padding:13px 12px;font-size:12px;gap:9px}.setup-grid{grid-template-columns:1fr}.start-panel{display:grid;grid-template-columns:1fr 200px;gap:0 15px;align-items:center;padding:22px}.start-panel .mini-book{display:none}.start-panel h3{grid-column:1;font-size:14px}.start-panel p{grid-column:1;margin:0}.start-panel .button{grid-column:2;grid-row:1 / 3;margin:0}.file-card{padding:14px 11px}.file-card input{top:14px;right:11px}.file-meta{flex-direction:column}.files-select{gap:9px}.stat-icon{display:none}.stat-value{font-size:22px}.stat-title{font-size:10px}.page-heading h1{font-size:24px}.topbar-right{gap:10px}.today{font-size:10px}.sidebar .local-note{padding:12px 9px}.local-note p{font-size:9px}.subdued{margin-left:7px}}@media(max-width:680px){.shell{display:block}.sidebar{width:auto;position:static;padding:18px 18px 0;border-right:0;border-bottom:1px solid var(--line);display:block}.brand{font-size:20px}.brand small{font-size:9px;letter-spacing:1px}.brand-mark{width:38px;height:40px}.nav-label{display:none}.sidebar nav{display:flex;gap:5px;margin-top:20px}.nav-item{flex:1;justify-content:center;width:auto;padding:12px 6px;font-size:12px;gap:7px;border-radius:7px 7px 0 0;margin:0;white-space:nowrap}.nav-item svg{width:17px;height:17px}.badge{margin-left:0;font-size:9px;padding:0 4px}.sidebar-bottom{display:none}.workspace{margin:0}.topbar{height:44px;padding:0 20px;font-size:10px}.topbar-right .avatar{display:none}.slash{padding:0 7px}.today{font-size:9px}main{padding:25px 18px 20px;min-height:calc(100vh - 230px)}.page-heading{gap:12px;margin-bottom:22px;align-items:flex-start}.page-heading h1{font-size:23px}.page-heading p{font-size:11px;max-width:230px}.eyebrow{font-size:9px}.page-heading .button{padding:9px 11px;font-size:11px;align-self:center}.stats-grid{gap:9px;margin-bottom:19px}.stat{padding:15px 11px}.stat-value{font-size:21px}.stat-value small{font-size:9px;margin-left:3px}.stat-title{font-size:10px}.panel{border-radius:10px;margin-bottom:18px}.panel-body{padding:20px 16px}.section-heading{margin-bottom:18px;align-items:center}.section-title{font-size:13px;gap:7px}.section-caption{max-width:none;text-align:left}.filters{gap:12px;margin-bottom:17px}.field{min-width:120px}.filters .search-field{flex-basis:100%}.filters .date-field{flex:1}.reset-filter{margin-bottom:0;padding:11px 0}.files-select{grid-template-columns:1fr}.file-card{padding:14px;display:grid;grid-template-columns:36px 1fr;gap:0 11px;align-items:center}.file-card input{top:25px;right:15px}.doc-icon{grid-row:1 / 3;margin:0;width:32px;height:36px}.file-title{font-size:12px;margin:0 28px 5px 0}.file-meta{flex-direction:row;grid-column:2;margin-right:28px;font-size:9px}.selection-bar{font-size:10px}.setup-grid{gap:0}.mode-grid{gap:8px}.mode-option{padding:15px 5px}.mode-glyph{font-size:17px;gap:8px}.mode-name{font-size:11px}.mode-option small{font-size:8px}.practice-options{font-size:10px}.start-panel{grid-template-columns:1fr 125px;padding:20px 16px;margin-bottom:18px;gap:0 9px}.start-panel h3{font-size:14px}.start-panel p{font-size:10px}.start-panel .button{font-size:11px;padding:10px}.tip{font-size:9px}footer{padding:15px 20px 24px;font-size:9px}footer span{display:none}.mobile-backup{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:4px 16px;margin:15px 0 0;font-size:12px;line-height:1.5}.mobile-backup .text-button{display:inline-flex;align-items:center;justify-content:center;min-height:36px;margin:0;padding:8px 0;font-family:inherit;font-size:inherit;line-height:inherit;font-weight:500;letter-spacing:normal;white-space:nowrap;flex-shrink:0}.table-scroll{overflow:auto}.data-table th,.data-table td{padding:13px 12px}.data-table td{font-size:11px}.data-table .en{font-size:12px;min-width:135px}.question-card{padding:25px 19px}.question-head{font-size:10px;align-items:start;gap:10px}.question-head .tag{font-size:9px}.question-body{padding:30px 0 24px}.question-text{font-size:25px}.question-answer{min-height:100px;font-size:14px}.answer-actions{flex-wrap:wrap}.answer-actions .button{padding:10px 13px;font-size:11px}.question-hint{font-size:10px}.practice-top{font-size:11px}.shortcuts{display:none}.summary-numbers{gap:26px}.session-summary{padding:30px 18px}.session-summary h2{font-size:23px}.dialog-content{padding:22px 16px}.dialog-heading h2{font-size:17px}.editor-header{gap:10px;flex-wrap:wrap}.edit-row{grid-template-columns:20px 1fr 1.05fr 20px;gap:4px;padding:7px 5px}.edit-row input{padding:8px 5px;font-size:11px}.search-mistakes{flex-wrap:wrap;gap:10px}.search-mistakes .search-input{max-width:none}.page-heading-actions{display:flex;flex-direction:column;gap:7px}.resume{font-size:10px;padding:12px}.resume .button{font-size:10px;padding:7px}.topbar-right{max-width:40%;white-space:nowrap}.notice{font-size:10px}.row-actions{gap:4px}.file-count-note{font-size:9px}}
@media(min-width:681px){.mobile-backup{display:none}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* Brand image retains its square proportions on every layout. */
.brand-mark{object-fit:contain;flex-shrink:0;height:auto;aspect-ratio:1 / 1}

[hidden]{display:none!important}.auth-root{min-height:100vh;padding:50px 20px;display:grid;place-items:center;background:radial-gradient(ellipse at 15% 10%,#e5efff,transparent 55%),#f6f8fc}.auth-card{width:min(100%,500px);padding:38px;background:white;border:1px solid #e1e9f8;border-radius:22px;box-shadow:0 18px 60px #2343720b}.auth-brand{display:flex;align-items:center;gap:13px;margin-bottom:36px;color:#203b60;font-size:23px;font-weight:700;text-decoration:none}.auth-brand img{width:58px;height:58px;border-radius:15px;object-fit:cover}.auth-brand small{display:block;font-size:12px;color:#8494ad;font-weight:400;margin-top:4px}.auth-card h1{font-size:26px;line-height:1.5;margin:12px 0}.auth-card p{color:#7d8ea8;font-size:14px;line-height:1.8}.auth-tabs{display:flex;gap:20px;border-bottom:1px solid #e6edf6;margin:22px 0}.auth-tabs button{padding:12px 3px;color:#8191ab;border-bottom:2px solid transparent}.auth-tabs .active{color:#2863ed;border-color:#2863ed}.auth-card .field,#password-form .field{display:flex;flex-direction:column;gap:8px;margin:15px 0;font-size:14px}.auth-card input,#password-form input{width:100%;padding:13px 15px;border:1px solid #dbe4f5;border-radius:9px;background:#fcfdff;font-size:16px;color:#203b60}.auth-submit{width:100%;justify-content:center;margin:6px 0 16px}.auth-foot{display:flex;gap:20px;justify-content:space-between;font-size:13px}.auth-privacy{font-size:12px!important;margin-top:23px!important}.account-bar{display:flex;align-items:center;flex-wrap:wrap;gap:8px 18px;margin:0 40px;padding:14px 0;border-bottom:1px solid #e4ebf5;font-size:12px;color:#778cab}.account-bar button{color:#3165c6;margin-right:12px}.account-actions{margin-left:auto}#sync-status[data-status=error],#sync-status[data-status=conflict],#sync-status[data-status=blocked]{color:#b34d36}#sync-status[data-status=pending]{color:#b08026}.topbar-right{flex-wrap:wrap}#account-name{max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}#account-dialog{width:min(94vw,500px)}
@media(max-width:760px){.auth-root{padding:20px 14px}.auth-card{padding:25px 22px}.auth-card h1{font-size:23px}.auth-brand{margin-bottom:27px}.account-bar{margin:0 18px;gap:8px}.account-actions{margin-left:0}#account-name{max-width:100px}.topbar-right{gap:7px}.auth-foot{flex-wrap:wrap}.sidebar-bottom .local-note{display:block}.account-bar #sync-controls{width:100%}}

/* Keep the document picker bounded; filters and selection actions remain outside. */
.files-select{
  max-height:clamp(160px,40vh,300px);
  overflow-y:auto;
  overflow-x:hidden;
  align-content:start;
  padding:3px 7px 5px 3px;
  overscroll-behavior-y:contain;
  -webkit-overflow-scrolling:touch;
  touch-action:pan-y pinch-zoom;
  scrollbar-gutter:stable;
  scrollbar-width:thin;
  scrollbar-color:#a7bee5 #f2f5fb;
  border-radius:9px;
}
.files-select:empty{display:none}
.files-select:focus-visible{outline:2px solid #9bbcf6;outline-offset:2px}
.files-select::-webkit-scrollbar{width:7px}
.files-select::-webkit-scrollbar-track{background:#f2f5fb;border-radius:6px}
.files-select::-webkit-scrollbar-thumb{background:#a7bee5;border-radius:6px}
@media(max-width:680px){.files-select{max-height:clamp(160px,38vh,280px);padding-right:6px}}

/* Keep compact navigation labels together on narrow phones. */
@media(max-width:360px){.sidebar nav{gap:4px}.nav-item{font-size:11px;gap:4px;padding:12px 4px}.nav-item svg{width:16px;height:16px}}

/* Explicit date selection; filters remain mounted while results update. */
.date-range .date-trigger{display:flex;align-items:center;justify-content:space-between;gap:8px;flex:1;min-width:0;min-height:40px;padding:10px 12px;border:1px solid #dbe3f2;border-radius:7px;background:#fcfdff;color:#394d6c;font:inherit;font-size:12px;white-space:nowrap;touch-action:manipulation}
.date-range .date-value{font:inherit;color:inherit;white-space:nowrap}
.date-trigger svg{width:16px;height:16px;flex-shrink:0}
.date-trigger:focus-visible{outline:2px solid #2563eb;outline-offset:2px}
.date-picker{box-sizing:border-box;width:min(360px,calc(100vw - 24px));max-height:calc(100dvh - 24px);padding:18px;border:1px solid #dbe3f2;border-radius:16px;overflow-y:auto;overscroll-behavior:contain;color:#233956;font-family:inherit;box-shadow:0 16px 55px #19396330;animation:none}
.date-picker::backdrop{background:rgb(25 42 68 / 24%);backdrop-filter:none;animation:none}
.calendar-heading{display:flex;justify-content:space-between;align-items:center;gap:10px}
.calendar-heading h2{margin:0;font-size:17px;line-height:1.5}
.calendar-heading button{width:36px;height:36px;font-size:24px;color:#7e8ca2}
.calendar-help{margin:2px 0 12px;font-size:12px;color:#8897ae;line-height:1.6}
.calendar-navigation{display:flex;align-items:center;justify-content:space-between;gap:6px;margin-bottom:8px}
.calendar-navigation>button{width:36px;height:40px;border-radius:8px;background:#f1f5fc;color:#426baf;font-size:25px;flex-shrink:0}
.calendar-month-controls{display:flex;align-items:center;gap:10px;font-size:14px;white-space:nowrap}
.calendar-month-controls label{display:flex;align-items:center;gap:2px}
.calendar-month-controls input,.calendar-month-controls select{min-height:40px;border:1px solid #dbe3f2;border-radius:7px;padding:6px;background:#fcfdff;color:#233956;font:inherit;font-size:16px}
.calendar-month-controls input{width:76px;box-sizing:border-box}
.calendar-month-controls select{max-width:76px}
.calendar-grid{width:100%;table-layout:fixed;border-collapse:separate;border-spacing:2px}
.calendar-grid th{font-size:12px;font-weight:500;color:#8a98ad;height:28px}
.calendar-grid td{padding:0;text-align:center}
.calendar-day{width:100%;min-height:38px;padding:4px 0;border:1px solid transparent;border-radius:8px;color:#334967;font:inherit;font-size:14px;line-height:1.5;touch-action:manipulation}
.calendar-day.outside{color:#a2adbf}
.calendar-day[aria-current=date]{border-color:#9ab7ec;color:#2563eb}
.calendar-day.selected{background:#2563eb;border-color:#2563eb;color:white;font-weight:600}
.calendar-day:focus-visible{outline:2px solid #2563eb;outline-offset:1px}
.calendar-actions{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:12px;padding-top:8px;border-top:1px solid #edf1f7}
.calendar-actions button{min-height:40px;padding:8px 12px;color:#356cbf;font:inherit;font-size:13px;white-space:nowrap}
.date-picker button:disabled{opacity:.35;cursor:default}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
@media(max-width:360px){.date-range .date-trigger{padding:10px 7px;gap:4px;font-size:11px}.date-trigger svg{display:none}.date-picker{padding:14px}.calendar-month-controls{gap:5px}}

.study-lookup{margin:2px 0 22px;padding:16px 0 18px;border-top:1px solid #eff2f7;border-bottom:1px solid #eff2f7}.study-lookup-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px;color:#2a3c59}.study-lookup-heading strong{font-size:12px;font-weight:650}.study-lookup-heading span{margin-left:10px;font-size:10px;color:#97a2b5;font-weight:400}.study-lookup-heading .lookup-scope{margin:0;white-space:nowrap}.study-lookup-controls{max-width:510px}.study-lookup-controls .search-input{flex:1;max-width:none}.study-lookup-controls .control{width:135px;flex:none}.lookup-empty{padding:15px 2px 2px;color:#9aa7ba;font-size:11px;line-height:1.8}.lookup-summary{padding:14px 0 9px;color:#8795aa;font-size:10px}.lookup-summary strong{color:var(--blue);font-weight:650}.lookup-summary span{color:#a0aabd}.lookup-table-wrap{border:1px solid #eef2f7;border-radius:8px;max-height:310px}.lookup-table{margin:0}.lookup-table th,.lookup-table td{padding:11px 13px}.lookup-table th{background:#fbfcff}.lookup-table td{font-size:11px}.lookup-table .lookup-en{min-width:155px}.lookup-table .lookup-cn{color:#445a7b;line-height:1.7;min-width:190px}.lookup-types{margin-top:4px}.lookup-table .review-speak-word{font-size:12px}

@media(max-width:680px){.study-lookup{margin:0 0 18px;padding:14px 0 16px}.study-lookup-heading{align-items:flex-start;flex-direction:column;gap:5px}.study-lookup-heading span{margin-left:0}.study-lookup-heading .lookup-scope{font-size:9px}.study-lookup-controls{width:100%;align-items:stretch}.study-lookup-controls .control{width:100%;min-height:39px}.lookup-table-wrap{max-height:280px}.lookup-table .lookup-en{min-width:135px}.lookup-table .lookup-cn{min-width:170px}}

/* Current-round navigation keeps previous answers separate from new submissions. */
.practice-navigation{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:20px;padding-top:18px;border-top:1px solid var(--line)}
.practice-navigation .button{min-width:96px;min-height:44px}
.practice-navigation .muted{text-align:center;white-space:nowrap}
.answer-edit .answer-edit-word{font-size:22px;font-weight:600;color:var(--ink);overflow-wrap:anywhere;margin:0 0 18px}
.answer-edit .question-answer{display:block;margin-top:9px}
@media(max-width:680px){.practice-navigation{gap:8px}.practice-navigation .button{min-width:78px;padding:10px 12px;font-size:12px}.practice-navigation .muted{font-size:10px}.answer-edit .question-answer{font-size:16px}}

/* Compact vocabulary lookup aligned with the mistake-review filter. */
.study-lookup-compact{margin:0 0 18px;padding:0;border:0}
.study-lookup-compact .study-lookup-heading{display:none}
.study-lookup-compact .study-lookup-controls{display:flex;align-items:center;gap:12px;width:100%;max-width:none;margin:0;padding:0}
.study-lookup-compact .search-input{flex:0 1 310px;max-width:310px;min-height:39px}
.study-lookup-compact .control{width:135px;min-height:39px;flex:none}
.study-lookup-compact .lookup-empty{display:none}
@media(max-width:680px){
 .study-lookup-compact{margin:0 0 18px}
 .study-lookup-compact .study-lookup-controls{display:flex;flex-wrap:wrap;align-items:stretch;gap:10px;width:100%}
 .study-lookup-compact .search-input{flex:1 1 100%;width:100%;max-width:none;min-height:40px}
 .study-lookup-compact .control{width:135px;min-height:40px}
}