:root{--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--tap-target:44px;--content-reading:720px;--focus-ring:0 0 0 3px rgba(139,124,255,0.22)}body,html{overflow-x:hidden}:where(a,button,input,textarea,select,summary):focus-visible{outline:2px solid var(--primary-strong);outline-offset:2px}.page{gap:18px}.page-header{gap:8px;padding-top:16px}.hero h1,.page-header h1{font-size:clamp(2rem,9vw,4.5rem)}.button,.filter-add-button,.filter-menu-option,.icon-button,.mobile-nav-item,.nav-link{min-height:var(--tap-target)}.card,.panel{border-radius:18px}.home-focus{display:flex;flex-direction:column;gap:12px;padding:12px 0 2px}.home-focus h1{margin:0;max-width:760px;font-size:clamp(2.35rem,12vw,5.4rem);line-height:.94;letter-spacing:-.06em;font-weight:560}.home-focus .page-description{max-width:600px}.home-continue,.home-progress-callout{padding:15px}.home-continue h2,.home-progress-callout h2{margin:3px 0 0;font-size:1rem}.home-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-block:1px solid var(--border)}.home-metrics>a{min-width:0;min-height:74px;display:flex;flex-direction:column;justify-content:center;gap:4px;padding:12px 10px}.home-metrics>a+a{border-left:1px solid var(--border)}.home-metrics strong{font-family:var(--font-geist-mono),"Geist Mono",monospace;font-size:clamp(1.1rem,5vw,1.55rem);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.home-metrics span{overflow:hidden;color:var(--text-muted);font-size:.66rem;line-height:1.25;text-overflow:ellipsis}.home-next-grid{gap:8px}.home-next-card{min-height:0;display:grid;grid-template-columns:36px minmax(0,1fr) auto;align-items:center;grid-gap:12px;gap:12px;padding:13px}.home-next-card .ia-card-icon{width:36px;height:36px}.home-next-card>div:nth-child(2){min-width:0}.home-next-card h2{margin-top:2px;font-size:.98rem}.home-next-card p:not(.eyebrow){display:none}.home-next-card .ia-card-link{width:36px;height:36px;overflow:hidden;color:var(--text-muted);font-size:0}.home-next-card .ia-card-link svg{width:18px;height:18px}.library-header{max-width:none}.library-header-actions,.library-primary-actions{display:flex;gap:8px;align-items:center}.library-header-actions{width:100%;justify-content:space-between}.library-primary-actions{flex:1 1;justify-content:flex-end}.library-primary-actions .button{width:auto;min-height:44px;padding-inline:13px}.ia-subnav{margin-inline:-16px;padding-inline:16px;scrollbar-width:none}.ia-subnav::-webkit-scrollbar{display:none}.ia-subnav a{min-height:40px}.library-tools{display:flex;flex-direction:column;gap:8px}.library-search{position:relative;display:flex;align-items:center;gap:8px}.library-search>svg{position:absolute;left:13px;z-index:1;color:var(--text-muted)}.library-search input[name=q],.library-search input[type=text]{min-height:48px;padding-left:40px;padding-right:48px}.library-search .icon-button{position:absolute;right:3px;width:42px;height:42px;min-height:42px;border:0;background:transparent}.filter-chip-row{display:flex;gap:7px;flex-wrap:wrap;padding-bottom:2px}.filter-add-button,.filter-chip{flex:0 0 auto;min-height:38px}.vocabulary-list{border-top:1px solid var(--border)}.vocabulary-row{position:relative;min-height:78px;display:grid;grid-template-columns:minmax(0,1fr) auto;grid-gap:8px 12px;gap:8px 12px;padding:12px 2px 13px;border-bottom:1px solid var(--border);background:transparent}.vocabulary-row-main{min-width:0}.vocabulary-row .word{overflow:hidden;font-size:1.04rem;line-height:1.25;text-overflow:ellipsis;white-space:nowrap}.translation-line{min-width:0;margin-top:4px}.translation-line span{display:block;overflow:hidden;color:var(--text-muted);font-size:.74rem;text-overflow:ellipsis;white-space:nowrap}.vocabulary-row-meta{min-width:70px;display:flex;flex-wrap:wrap;align-content:start;justify-content:flex-end;gap:4px;color:var(--text-muted);font-size:.62rem;text-transform:lowercase}.vocabulary-row-meta strong{width:100%;color:var(--text-soft);font-family:var(--font-geist-mono),"Geist Mono",monospace;font-size:.66rem;font-weight:500;text-align:right}.row-signal{padding:2px 5px;border:1px solid var(--border);border-radius:999px;background:var(--surface-raised)}.vocabulary-row .mastery-line{grid-column:1/-1;height:3px;margin-top:-2px}.word-primary-actions{display:flex;flex-direction:column;gap:8px;width:100%}.word-primary-actions>.button{width:100%}.word-quick-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:6px;gap:6px}.word-quick-actions a{min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--border);border-radius:12px;background:var(--surface-raised);color:var(--text-soft);font-size:.75rem;font-weight:560}.word-detail-grid{gap:10px}.word-detail-card{padding:15px}.word-detail-card h2{margin-bottom:10px}.word-detail-disclosure{padding:0}.word-detail-disclosure>summary,.word-history-disclosure>summary{min-height:58px;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 15px;list-style:none}.word-detail-disclosure>summary::-webkit-details-marker,.word-history-disclosure>summary::-webkit-details-marker{display:none}.word-detail-disclosure>summary span:first-child,.word-history-disclosure>summary span:first-child{display:flex;flex-direction:column;gap:3px}.word-detail-disclosure>summary strong,.word-history-disclosure>summary strong{color:var(--text);font-size:.9rem}.disclosure-hint,.word-history-disclosure summary small{color:var(--text-muted);font-size:.66rem}.word-disclosure-content{padding:0 15px 15px}.word-history-disclosure{padding:0;overflow:hidden;border:1px solid var(--border);border-radius:16px;background:var(--surface)}.word-history-disclosure .word-history-grid{padding:0 10px 10px}.word-history-disclosure .word-detail-card{box-shadow:none}.review-landing{gap:16px}.review-hero{display:flex;flex-direction:column;gap:16px;padding:14px 0 4px}.review-hero h1{margin:4px 0 0;font-size:clamp(2.3rem,12vw,5rem);line-height:.96;letter-spacing:-.055em;font-weight:560}.review-hero p:not(.eyebrow){margin:9px 0 0;max-width:600px;color:var(--text-soft);line-height:1.55}.review-start{width:100%;min-height:54px}.review-queue-summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border:1px solid var(--border);border-radius:15px;overflow:hidden;background:var(--surface)}.review-queue-summary>div{min-height:72px;display:flex;flex-direction:column;justify-content:center;gap:3px;padding:10px 12px}.review-queue-summary>div+div{border-left:1px solid var(--border)}.review-queue-summary strong{font-family:var(--font-geist-mono),"Geist Mono",monospace;font-size:1.25rem}.review-queue-summary span{color:var(--text-muted);font-size:.67rem}.review-mode-list{display:flex;flex-direction:column;border-block:1px solid var(--border)}.review-mode-list>a{min-height:62px;display:grid;grid-template-columns:28px minmax(0,1fr) 18px;align-items:center;grid-gap:10px;gap:10px;padding:9px 2px}.review-mode-list>a+a{border-top:1px solid var(--border)}.review-mode-list>a>svg:first-child{color:var(--primary-strong)}.review-mode-list span{min-width:0;display:flex;flex-direction:column;gap:2px}.review-mode-list strong{font-size:.84rem}.review-mode-list small{color:var(--text-muted);font-size:.68rem}.review-mode-grid .practice-lane{position:relative}.review-mode-count{position:absolute;top:12px;right:12px;min-width:24px;height:24px;display:grid;place-items:center;padding:0 6px;border:1px solid var(--border);border-radius:999px;background:var(--surface-raised);color:var(--text-muted);font-size:.72rem;font-weight:700;line-height:1}.review-session-shell{min-height:calc(100dvh - 180px);justify-content:center;gap:10px}.review-session-topbar{width:min(100%,760px);margin:0 auto;display:flex;align-items:center;justify-content:space-between;color:var(--text-muted);font-size:.72rem}.review-session-shell .learning-card{margin-inline:auto;padding:16px}.review-session-shell .learning-prompt{margin-block:10px 16px}.review-session-shell .grade-grid{position:-webkit-sticky;position:sticky;bottom:calc(78px + env(safe-area-inset-bottom));z-index:4;padding:7px;border:1px solid var(--border);border-radius:15px;background:rgba(17,17,20,.94);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.review-session-shell .grade-grid .button{min-height:50px}.practice-hub{gap:16px}.practice-header{padding-bottom:0}.practice-lanes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:12px;gap:12px}.practice-lane{min-height:140px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:14px;border:1px solid var(--border);border-radius:18px;background:var(--surface)}.practice-lane-grammar{grid-column:1/-1}.practice-lane-icon{width:58px;height:58px;display:grid;place-items:center;border:1px solid var(--border);border-radius:17px;background:var(--surface-raised);color:var(--primary-strong)}.practice-lane-copy{min-width:0;display:flex;flex-direction:column;align-items:center;text-align:center}.practice-lane-copy strong{font-size:1rem}.practice-shortcuts{display:flex;flex-direction:column;gap:10px;padding-top:4px}.practice-shortcuts-heading{display:flex;align-items:end;justify-content:space-between;gap:12px}.practice-shortcuts-heading>span{color:var(--text-muted);font-size:.66rem}.practice-shortcut-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:8px;gap:8px}.practice-shortcut-grid>a{min-height:58px;display:grid;grid-template-columns:24px minmax(0,1fr);align-items:center;grid-gap:8px;gap:8px;padding:9px 10px;border:1px solid var(--border);border-radius:13px;background:var(--surface)}.practice-shortcut-grid>a>svg{color:var(--text-muted)}.practice-shortcut-grid span{min-width:0;display:flex;flex-direction:column;gap:1px}.practice-shortcut-grid strong{font-size:.75rem}.practice-shortcut-grid small{color:var(--text-muted);font-size:.61rem}.reading-form,.writing-start-form{padding:15px}.writing-editor textarea{min-height:48dvh;padding:14px}.writing-editor-footer{position:-webkit-sticky;position:sticky;bottom:calc(78px + env(safe-area-inset-bottom));z-index:4;padding:9px;border:1px solid var(--border);border-radius:15px;background:rgba(17,17,20,.94);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.reading-form textarea{min-height:38dvh}.core-loading{gap:14px}.loading-home-hero{min-height:205px}.loading-hero-title{width:min(86%,480px);height:58px}.loading-primary-action{width:min(100%,240px);height:50px;border-radius:14px}.loading-metric{height:68px;border-radius:0}.loading-action-row{height:78px;border-radius:14px}.loading-mode-card{position:relative}.loading-card-icon{width:58px;height:58px;border-radius:17px}.loading-card-label{width:86px;max-width:80%;height:17px;border-radius:6px}.loading-count-badge{position:absolute;top:12px;right:12px;width:24px;height:24px;border-radius:999px}.loading-search{height:48px;border-radius:14px}.loading-chip-row{display:flex;gap:7px}.loading-chip{width:72px;height:38px;border-radius:999px}.loading-vocabulary-title{width:min(38vw,280px);height:48px}.loading-add-word{width:120px;height:44px;border-radius:12px}.loading-add-filter{width:112px;height:44px;border-radius:11px}.loading-language-switch{display:flex;gap:3px;padding:3px;border:1px solid var(--border);border-radius:11px}.loading-language-switch .skeleton{width:43px;height:36px;border-radius:8px}.loading-language-switch .skeleton:last-child{width:55px}.loading-list-count{width:120px;height:14px;margin-top:2px}.loading-vocabulary-row{min-height:82px}.loading-vocabulary-row .skeleton-stack{gap:9px}.loading-row-word{width:min(55vw,220px);height:23px}.loading-row-translation{width:min(45vw,170px);height:14px}.loading-row-meta{width:88px;height:17px}.loading-row-mastery{grid-column:1/-1;height:4px;border-radius:999px}.loading-word-badges{display:flex;flex-wrap:wrap;gap:7px}.loading-word-badges .skeleton{width:65px;height:26px;border-radius:8px}.loading-word-badges .skeleton:nth-child(2){width:82px}.loading-language-switch--word .skeleton:last-child{width:43px}.loading-word-title{width:min(75%,450px);height:clamp(40px,9vw,70px)}.loading-word-meaning{width:min(65%,330px);height:29px}.loading-word-action{flex:1 1 165px;height:44px;border-radius:12px}.loading-section-heading{width:130px;height:25px}.loading-example-grid{display:grid;grid-gap:12px;gap:12px}.loading-example-card{height:150px;border-radius:14px}.loading-word-disclosure{height:70px;border-radius:14px}.loading-rescue-back{width:78px;height:20px}.loading-rescue-title{width:min(75%,310px);height:48px}.loading-rescue-rank{width:20px;height:14px;margin-top:3px}.loading-rescue-word{width:min(55vw,220px);height:20px}.loading-rescue-retrievability{width:125px;height:13px}.loading-rescue-reason{width:min(65vw,260px);height:22px;border-radius:8px}.loading-rescue-score{width:30px;height:18px}.loading-rescue-action{width:min(100%,210px);height:44px;border-radius:12px}.loading-rescue-action.secondary{width:min(100%,145px)}.loading-mistakes-title{width:min(85%,390px);height:48px}.loading-mistakes-count{width:190px;height:16px}.loading-mistakes-refresh{width:215px;height:44px;border-radius:12px}.loading-mistakes-heading{display:flex;flex-direction:column;gap:8px}.loading-mistakes-kicker{width:145px;height:12px}.loading-mistakes-subtitle{width:min(65%,250px);height:25px}.loading-mistakes-badges{display:flex;gap:7px}.loading-mistakes-badges .skeleton{width:80px;height:24px;border-radius:8px}.loading-mistakes-badges .skeleton:last-child{width:115px}.loading-mistakes-cluster-title{width:min(65vw,270px);height:24px}.loading-mistakes-icon{width:20px;height:20px}.loading-mistakes-copy{display:flex;flex-direction:column;gap:8px}.loading-mistakes-copy .skeleton{width:min(60vw,300px);height:16px}.loading-mistakes-copy .skeleton:last-child{width:min(48vw,210px)}.loading-mistakes-resolve{width:90px;height:38px;border-radius:10px}.loading-mistakes-practice{width:min(100%,235px);height:44px;border-radius:12px}.loading-hub-title{width:min(75%,340px);height:50px}.loading-hub-title.wide{width:min(90%,570px)}.loading-hub-form{display:grid;grid-gap:18px;gap:18px}.conversation-start-form.loading-hub-form,.loading-field-group,.writing-start-form.loading-hub-form{display:flex;flex-direction:column}.loading-field-group{gap:8px;min-width:0}.loading-setting-label{width:min(70%,115px);height:14px}.loading-setting-control{width:100%;height:48px;border-radius:12px}.loading-form-submit{width:min(100%,220px);height:44px;border-radius:12px}.loading-target-picker{display:grid;grid-gap:12px;gap:12px;padding:16px;border:1px solid var(--border);border-radius:14px}.loading-target-picker legend .skeleton{display:block}.loading-target-hint{width:min(90%,370px);height:15px}.loading-collection-row{min-height:68px}.loading-collection-title{width:min(55vw,250px);height:18px}.loading-collection-meta{width:min(68vw,320px);height:13px}.loading-collection-arrow{width:18px;height:18px}.reading-generation-preview{display:grid;grid-gap:14px;gap:14px;padding:18px;border:1px solid var(--border);border-radius:14px;background:var(--surface-raised)}.reading-generation-preview>strong{font-size:.88rem}.loading-generated-title{width:min(80%,390px);height:30px}.loading-generated-paragraphs{display:grid;grid-gap:11px;gap:11px}.loading-generated-paragraphs .skeleton{width:100%;height:15px}.loading-generated-paragraphs .skeleton:nth-child(3n){width:68%}.loading-generated-paragraphs .skeleton:nth-child(5n){width:86%}.loading-back-link{width:90px;height:18px}.loading-meta-badges{display:flex;flex-wrap:wrap;gap:7px}.loading-meta-badges .skeleton{width:63px;height:25px;border-radius:8px}.loading-meta-badges .skeleton:nth-child(2n){width:85px}.loading-document-title{width:min(82%,510px);height:52px}.loading-reading-document{min-height:340px}.loading-reading-paragraphs{display:grid;grid-gap:24px;gap:24px}.loading-reading-assessment,.loading-reading-notes,.loading-reading-summary{display:grid;grid-gap:15px;gap:15px}.loading-reading-assessment-head{display:grid;grid-gap:8px;gap:8px}.loading-note-row{height:52px;border-radius:11px}.loading-reading-question{display:grid;grid-gap:12px;gap:12px}.loading-question-heading{display:flex;align-items:flex-start;gap:12px}.loading-question-heading .skeleton-stack{flex:1 1;gap:9px}.loading-question-number{width:34px;height:34px;border-radius:10px}.loading-question-type{width:100px;height:22px;border-radius:8px}.loading-question-title{width:min(90%,450px);height:20px}.loading-question-option{height:52px;border-radius:12px}.loading-scenario{width:min(90%,520px);height:18px}.loading-scenario.short{width:min(65%,340px)}.loading-conversation-targets{display:flex;flex-wrap:wrap;gap:8px}.loading-conversation-targets .skeleton{width:120px;height:43px;border-radius:11px}.loading-mission-objective{align-items:center}.loading-objective-icon{width:18px;height:18px}.loading-objective-label{width:75px;height:14px}.loading-objective-copy{width:min(65vw,310px);height:15px}.loading-conversation-chat{min-height:330px}.loading-conversation-message{align-items:flex-start}.loading-avatar{width:36px;height:36px;border-radius:50%;flex:0 0 auto}.loading-message{width:min(72%,350px);height:58px;border-radius:14px}.loading-message.response{width:min(60%,270px)}.loading-conversation-composer{display:flex;gap:8px;align-items:end}.loading-chat-input{flex:1 1;height:60px;border-radius:12px}.loading-chat-send{width:44px;height:44px;border-radius:11px}.loading-conversation-finish{width:min(100%,180px);height:44px;border-radius:12px}.loading-writing-task{display:grid;grid-gap:12px;gap:12px}.loading-task-line{width:min(90%,650px);height:17px}.loading-task-line.short{width:min(60%,400px)}.loading-target-chips{display:flex;flex-wrap:wrap;gap:7px}.loading-target-chips .skeleton{width:85px;height:28px;border-radius:999px}.loading-writing-editor-shell{display:grid;grid-gap:12px;gap:12px}.loading-writing-editor{min-height:48dvh;border-radius:16px}.loading-writing-footer{display:flex;align-items:center;justify-content:space-between;gap:12px}.loading-word-count{width:125px;height:15px}@media (max-width:380px){.loading-writing-footer .loading-form-submit{width:140px}}@media (min-width:620px){.conversation-start-form.loading-hub-form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.conversation-start-form.loading-hub-form>.field:first-child,.conversation-start-form.loading-hub-form>.loading-form-submit{grid-column:1/-1}}@media (min-width:940px){.writing-start-form.loading-hub-form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.writing-start-form.loading-hub-form>*{grid-column:1/-1}}@media (min-width:700px){.loading-example-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}.loading-shortcut-panel{height:126px;border-radius:16px}.loading-form-panel,.loading-reading-panel{display:flex;flex-direction:column;gap:12px}.loading-form-grid{display:grid;grid-template-columns:1fr;grid-gap:10px;gap:10px}.loading-field{height:54px;border-radius:13px}.loading-field.wide{height:90px}.loading-textarea{height:280px;border-radius:14px}@media (max-width:619px){.filter-menu{z-index:80;max-height:min(62dvh,520px);overflow:auto}.word-detail-topline{align-items:flex-start}.word-detail-topline .word-meta{gap:5px}.word-detail-topline .badge:nth-child(n+3){display:none}.intelligence-panel,.word-history-disclosure{scroll-margin-top:76px}}@media (min-width:620px){.page{gap:22px}.home-next-card p:not(.eyebrow){display:block}.home-next-card{grid-template-columns:38px minmax(0,1fr);align-items:start;padding:16px}.home-next-card .ia-card-link{grid-column:2;width:auto;height:auto;overflow:visible;font-size:.76rem}.library-header-actions{width:auto}.vocabulary-row{min-height:84px;padding-inline:8px}.review-hero{flex-direction:row;align-items:end;justify-content:space-between}.review-start{width:auto;min-width:160px}.practice-shortcut-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.loading-form-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.writing-editor-footer{position:static;padding:0;border:0;background:transparent;-webkit-backdrop-filter:none;backdrop-filter:none}}@media (min-width:940px){.page{gap:24px}.home-focus{padding-top:28px}.home-next-grid{gap:12px}.word-primary-actions{width:auto;align-items:flex-start}.word-primary-actions>.button{width:auto}.word-quick-actions{width:420px}.review-session-shell .grade-grid{position:static;padding:0;border:0;background:transparent;box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none}}.home-today-activity{display:flex;align-items:center;gap:16px;min-height:42px;color:var(--text-muted)}.home-today-activity>div{display:inline-flex;align-items:baseline;gap:5px}.home-today-activity strong{color:var(--text-soft);font-family:var(--font-geist-mono),"Geist Mono",monospace;font-size:.8rem;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.home-today-activity span{font-size:.66rem}@media (max-width:359px){.home-today-activity{gap:10px}.home-today-activity>div{gap:3px}}.optimistic-error{width:min(100%,760px);margin-inline:auto;display:grid;grid-template-columns:20px minmax(0,1fr) auto;align-items:center;grid-gap:9px;gap:9px;padding:10px 12px;border:1px solid rgba(239,91,91,.35);border-radius:13px;background:rgba(239,91,91,.08);color:var(--text-soft);font-size:.74rem}.optimistic-error>svg{color:var(--danger)}.optimistic-error .text-button{min-height:36px}.optimistic-next-card{width:min(100%,760px);margin-inline:auto;display:flex;flex-direction:column;gap:12px}.optimistic-next-card>span{color:var(--text-muted);font-size:.72rem}.grade-grid .button:disabled{cursor:wait}@media (max-width:480px){.optimistic-error{grid-template-columns:20px minmax(0,1fr)}.optimistic-error .text-button{grid-column:2;justify-self:start}}.skip-link{position:fixed;z-index:200;top:max(10px,env(safe-area-inset-top));left:12px;padding:10px 13px;border:1px solid var(--border-strong);border-radius:12px;background:var(--text);color:var(--bg);font-size:.8rem;font-weight:700;transform:translateY(-160%);transition:transform .14s ease}.skip-link:focus{transform:translateY(0)}#main-content:focus{outline:none}.reading-document-page,.reading-hub,.review-page,.vocabulary-page,.word-detail-page,.writing-hub,.writing-session-page{width:100%}.library-header-copy,.practice-workbench-header{max-width:var(--content-reading)}.library-header-copy{display:flex;flex-direction:column;gap:7px}.library-header-description{max-width:620px;margin:0;color:var(--text-soft);font-size:.88rem;line-height:1.55}.library-count{display:flex;align-items:baseline;gap:6px;margin:2px 0 0;color:var(--text-muted);font-family:var(--font-geist-mono),"Geist Mono",monospace;font-size:.7rem}.library-count strong{color:var(--text-soft);font-size:.8rem;font-weight:600}.vocabulary-page .library-header{flex-direction:row;align-items:center;justify-content:space-between;gap:20px;padding-top:18px;padding-bottom:10px}.vocabulary-page .library-header h1{margin:0;min-width:0;font-size:clamp(1.65rem,7vw,3rem)}.vocabulary-page .library-header .button{width:auto;flex:0 0 auto}.vocabulary-controls-row{display:flex;align-items:center;justify-content:space-between;gap:10px}.vocabulary-controls-row .translation-switch{flex:0 1 auto;min-width:0}.vocabulary-controls-row .filter-builder{flex:0 0 auto}.vocabulary-list-count{margin-top:2px}.vocabulary-page .library-header-actions{align-items:stretch}.vocabulary-page .library-primary-actions{gap:8px}.vocabulary-page .ia-subnav{padding-block:2px}.vocabulary-page .library-tools{gap:10px}.vocabulary-page .filter-chip-row{padding-bottom:4px}.vocabulary-page .vocabulary-list{margin-top:2px;border-top-color:var(--border-strong)}.vocabulary-page .vocabulary-row{min-height:82px;padding-block:14px;background:transparent;content-visibility:auto;contain-intrinsic-size:auto 82px;transition:background .14s ease,border-color .14s ease,transform .14s ease}.vocabulary-page .vocabulary-row:nth-child(2n){background:transparent}.vocabulary-page .vocabulary-row .word{font-size:1.08rem;font-weight:650;letter-spacing:-.025em}.vocabulary-page .translation-line{margin-top:5px}.vocabulary-page .translation-line span{color:var(--text-soft);font-size:.78rem}.vocabulary-page .vocabulary-row-meta{min-width:78px;gap:5px}.vocabulary-page .vocabulary-row-meta>span:first-child{color:var(--text-muted);font-family:var(--font-geist-mono),"Geist Mono",monospace;font-size:.62rem}.vocabulary-page .row-signal{border-color:var(--border-strong);background:rgba(255,255,255,.025)}.vocabulary-page .vocabulary-row-meta strong{margin-top:1px;color:var(--text);font-size:.7rem}.vocabulary-page .mastery-line{opacity:.82}.word-detail-page{gap:18px}.word-identity-hero{position:relative;gap:14px;overflow:hidden;padding:20px;border:1px solid var(--border);border-radius:var(--radius-lg);background:radial-gradient(circle at 100% 0,rgba(139,124,255,.11),transparent 40%),linear-gradient(180deg,rgba(255,255,255,.025),transparent),var(--surface)}.word-identity-hero h1{max-width:900px;font-size:clamp(2.2rem,8vw,4.6rem);line-height:1.02;letter-spacing:-.065em;overflow-wrap:anywhere}.word-identity-hero .page-description{color:var(--text-muted);font-size:.82rem}.word-detail-page .word-detail-topline{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:start;grid-gap:12px;gap:12px}.word-detail-page .word-detail-topline .word-meta{min-width:0}.word-hero-meanings{margin-top:4px;padding-top:18px;border-top:1px solid var(--border)}.word-hero-meaning-list{display:flex;flex-wrap:wrap;gap:16px 32px}.word-hero-meaning{flex:1 1 220px;min-width:0;margin:0;font-size:clamp(1.12rem,2.7vw,1.65rem);font-weight:580;line-height:1.45}.word-hero-meaning--fa{text-align:right}.word-hero-meaning--en{text-align:left}.word-detail-actions{display:flex;flex-wrap:wrap;gap:8px}.word-detail-actions>.button,.word-detail-actions>.word-quick-action-button{flex:1 1 165px;min-height:var(--tap-target)}.word-example-action{align-items:flex-start}.teach-sheet-overlay{position:fixed;z-index:120;inset:0;display:flex;align-items:flex-end;justify-content:center;padding:0 16px}.teach-sheet-backdrop{position:absolute;inset:0;border:0;background:rgba(0,0,0,.72);-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.teach-sheet{position:relative;z-index:1;width:min(640px,100%);max-height:min(76dvh,680px);display:flex;flex-direction:column;overflow:hidden;border:1px solid var(--border-strong);border-bottom:0;border-radius:24px 24px 0 0;background:var(--surface);box-shadow:var(--shadow)}.teach-sheet-handle{width:38px;height:4px;flex:0 0 auto;margin:10px auto 0;border-radius:999px;background:var(--border-strong)}.teach-sheet-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:18px 22px 12px;border-bottom:1px solid var(--border)}.teach-sheet-header h2{margin:4px 0 0;font-size:clamp(1.35rem,4vw,1.8rem)}.teach-sheet-content{min-height:130px;overflow-y:auto;overscroll-behavior:contain;padding:20px 22px}.teach-sheet-lesson{line-height:1.7;overflow-wrap:anywhere}.teach-sheet-lesson--fa{text-align:right}.teach-sheet-lesson--en{text-align:left}.teach-sheet-lesson>:first-child{margin-top:0}.teach-sheet-lesson>:last-child{margin-bottom:0}.teach-sheet-lesson blockquote,.teach-sheet-lesson ol,.teach-sheet-lesson p,.teach-sheet-lesson ul{margin:0 0 14px}.teach-sheet-lesson h1,.teach-sheet-lesson h2,.teach-sheet-lesson h3{margin:18px 0 8px;font-size:1rem;line-height:1.4}.teach-sheet-lesson ol,.teach-sheet-lesson ul{-webkit-padding-start:1.4rem;padding-inline-start:1.4rem}.teach-sheet-lesson li+li{margin-top:6px}.teach-sheet-lesson strong{color:var(--text)}.teach-sheet-lesson a{color:var(--primary-strong);text-decoration:underline}.teach-sheet-lesson blockquote{-webkit-padding-start:12px;padding-inline-start:12px;-webkit-border-start:2px solid var(--primary);border-inline-start:2px solid var(--primary);color:var(--text-soft)}.teach-sheet-lesson pre{overflow-x:auto;padding:12px;border-radius:10px;background:var(--surface-soft);direction:ltr;text-align:left}.teach-sheet-lesson code{direction:ltr;unicode-bidi:-webkit-isolate;unicode-bidi:isolate}.teach-sheet-lesson table{display:block;max-width:100%;overflow-x:auto;border-collapse:collapse}.teach-sheet-lesson td,.teach-sheet-lesson th{padding:7px 10px;border:1px solid var(--border)}.teach-sheet-footer{display:flex;justify-content:flex-end;padding:12px 22px max(16px,env(safe-area-inset-bottom));border-top:1px solid var(--border)}@media (max-width:619px){.teach-sheet-overlay{padding:0}.teach-sheet{width:100%}}.word-identity-mastery{width:min(100%,520px);display:flex;flex-direction:column;gap:8px;padding-top:2px}.word-identity-mastery>div:first-child{display:flex;align-items:baseline;justify-content:space-between;gap:16px}.word-identity-mastery span{color:var(--text-soft);font-size:.78rem}.word-identity-mastery strong{color:var(--text);font-family:var(--font-geist-mono),"Geist Mono",monospace;font-size:.9rem}.word-identity-mastery small{color:var(--text-muted);font-size:.68rem;text-align:right}.word-identity-mastery .metric-bar{height:5px;background:rgba(255,255,255,.06)}.word-detail-page .word-primary-actions{margin-top:2px}.word-detail-page .word-quick-actions{gap:7px}.word-detail-page .word-quick-actions>*{min-height:var(--tap-target)}.word-detail-page .word-detail-grid{gap:10px}.word-detail-page .word-detail-card{border-color:var(--border);background:var(--surface)}.word-detail-page .word-detail-card .eyebrow{margin-bottom:2px}.word-detail-page .lesson-meaning{font-size:1.18rem}.word-detail-page .mastery-row{gap:6px}.word-detail-page .intelligence-panel{border-color:var(--border)}.word-detail-page .example-card{min-height:150px}.word-detail-page .example-card>strong{font-size:1rem;line-height:1.6}.word-detail-page .relation-chip{transition:border-color .14s ease,background .14s ease,transform .14s ease}.review-page{max-width:860px;margin-inline:auto}.review-page .review-hero{gap:20px;padding:20px;border:1px solid var(--border);border-radius:var(--radius-lg);background:radial-gradient(circle at 100% 0,rgba(139,124,255,.12),transparent 45%),var(--surface)}.review-page .review-hero h1{margin-top:6px;font-size:clamp(2.6rem,13vw,5.6rem)}.review-page .review-hero p:not(.eyebrow){max-width:540px}.review-page .review-start{min-height:52px}.review-page .review-queue-summary{border-color:var(--border-strong);background:transparent}.review-page .review-queue-summary>div{min-height:78px}.review-page .review-queue-summary strong{font-size:1.45rem;letter-spacing:-.05em}.review-page .review-mode-list{gap:0}.review-page .review-mode-list>a{min-height:70px;transition:background .14s ease,color .14s ease,transform .14s ease}.review-page .review-mode-list>a:active{transform:scale(.995)}.practice-workbench-header{padding-top:20px}.practice-workbench-header h1{font-size:clamp(2.5rem,12vw,5rem)}.reading-hub,.writing-hub{max-width:920px}.reading-hub .reading-form,.writing-hub .writing-start-form{max-width:880px;gap:16px;padding:18px;border-color:var(--border-strong);background:linear-gradient(180deg,rgba(255,255,255,.025),transparent 70%),var(--surface)}.reading-hub .reading-form .button,.writing-hub .writing-start-form .button{min-height:52px}.reading-hub .collection-list,.writing-hub .collection-list{border-top:1px solid var(--border)}.reading-hub .collection-row,.writing-hub .collection-row{min-height:68px;padding-inline:4px}.writing-session-page{max-width:980px}.writing-session-header{max-width:820px}.writing-session-header h1{font-size:clamp(2.2rem,9vw,4.2rem);line-height:.98}.writing-session-page .writing-task{max-width:820px;padding:18px;background:var(--surface)}.writing-session-page .writing-task pre{font-size:.94rem;line-height:1.7}.writing-session-page .writing-editor{max-width:900px;gap:12px}.writing-editor-heading{display:flex;flex-direction:column;gap:3px}.writing-editor-heading label{color:var(--text);font-size:.9rem;font-weight:650}.writing-editor-heading span{color:var(--text-muted);font-size:.72rem}.writing-session-page .writing-editor textarea{min-height:52dvh;padding:16px;border-color:var(--border-strong);border-radius:18px;background:linear-gradient(180deg,rgba(255,255,255,.018),transparent 18rem),#0d0d10;font-size:1.03rem;line-height:1.75}.writing-session-page .writing-editor textarea:focus{background:#101014}.writing-session-page .writing-editor-footer{border-color:var(--border-strong);box-shadow:0 14px 34px rgba(0,0,0,.26)}.writing-session-page .writing-score-grid{border-color:var(--border-strong);border-radius:18px;background:var(--surface)}.writing-session-page .writing-score-grid>div{min-height:74px;justify-content:center;padding:14px}.writing-session-page .writing-score-grid strong{font-size:1.35rem}.writing-session-page .improved-writing,.writing-session-page .writing-summary{max-width:820px}.writing-session-page .writing-feedback-section{max-width:900px}.reading-document-page{max-width:1120px}.reading-document-header{max-width:860px}.reading-document-header h1{font-size:clamp(2.25rem,9vw,4.4rem)}.reading-document-page .reading-layout{gap:14px}.reading-document-page .reading-text-panel{padding:18px 16px 24px;border:1px solid var(--border);border-radius:var(--radius-lg);background:linear-gradient(180deg,rgba(255,255,255,.018),transparent 16rem),var(--surface)}.reading-document-page .reading-legend{padding-bottom:12px;border-bottom:1px solid var(--border)}.reading-document-page .reading-text{max-width:72ch;color:#d4d4dc;font-size:clamp(1.06rem,4.2vw,1.22rem);line-height:1.95}.reading-document-page .reading-token{border-radius:5px}.reading-document-page .reading-token.unknown{background:rgba(139,124,255,.11)}.reading-document-page .reading-token.learning{background:rgba(240,179,91,.07)}.reading-detail-desktop{display:none}.reading-detail-backdrop{position:fixed;z-index:69;inset:0;border:0;background:rgba(0,0,0,.56);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.reading-detail-mobile{position:fixed;z-index:70;inset:auto 10px calc(82px + env(safe-area-inset-bottom)) 10px;width:auto;max-height:min(66dvh,620px);overflow-y:auto;overscroll-behavior:contain;padding:10px 16px 18px;border-color:var(--border-strong);border-radius:22px;background:var(--surface);box-shadow:0 24px 70px rgba(0,0,0,.5)}.reading-sheet-handle{width:38px;height:4px;margin:0 auto 7px;border-radius:999px;background:var(--border-strong)}.reading-sheet-header{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:44px;margin-bottom:3px}.reading-sheet-header>span{color:var(--text-muted);font-size:.7rem;font-weight:650;letter-spacing:.05em;text-transform:uppercase}.reading-sheet-header .icon-button{width:40px;height:40px;min-height:40px;border:0;background:transparent}.filter-menu,.mobile-add-sheet-panel{overscroll-behavior:contain}@media (min-width:620px){.vocabulary-page .library-header-actions{align-items:flex-end}.vocabulary-page .vocabulary-row{min-height:88px;padding:15px 10px}.word-identity-hero{padding:26px}.word-detail-page .word-primary-actions{align-items:flex-start}.review-page .review-hero{padding:24px}.reading-hub .reading-form,.writing-hub .writing-start-form{padding:22px}.writing-session-page .writing-editor textarea{min-height:56vh;padding:20px}.reading-document-page .reading-text-panel{padding:22px 24px 30px}}@media (min-width:940px){.vocabulary-page .library-header{padding-top:30px}.vocabulary-page .vocabulary-row{margin-inline:-12px;padding-inline:12px;border-bottom-color:rgba(42,42,49,.78);border-radius:12px}.vocabulary-page .vocabulary-row:hover{z-index:1;border-color:transparent;background:var(--surface);transform:translateX(2px)}.word-identity-hero{padding:30px}.word-detail-page .word-detail-grid{grid-template-columns:minmax(0,1.15fr) minmax(300px,.85fr);align-items:start}.word-detail-page .word-detail-disclosure{grid-column:1/-1}.word-detail-page .relation-chip:hover{border-color:var(--border-strong);background:var(--surface-soft);transform:translateY(-1px)}.review-page{padding-top:22px}.review-page .review-hero{padding:28px}.review-page .review-mode-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:10px;gap:10px;border:0}.review-page .review-mode-list>a{min-height:112px;grid-template-columns:30px minmax(0,1fr);align-content:center;padding:16px;border:1px solid var(--border)!important;border-radius:16px;background:var(--surface)}.review-page .review-mode-list>a>svg:last-child{grid-column:2;margin-top:3px}.review-page .review-mode-list>a:hover{border-color:var(--border-strong)!important;background:var(--surface-raised);transform:translateY(-2px)}.reading-hub,.writing-hub{padding-top:12px}.writing-hub .writing-start-form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.writing-hub .writing-start-form>.button,.writing-hub .writing-start-form>.field,.writing-hub .writing-start-form>.status-notice,.writing-hub .writing-start-form>.writing-settings-row{grid-column:1/-1}.writing-session-page .writing-editor{max-width:920px}.writing-session-page .writing-editor-footer{position:static;padding:0;border:0;background:transparent;box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none}.reading-document-page .reading-layout{grid-template-columns:minmax(0,1.75fr) minmax(290px,.72fr);gap:20px}.reading-detail-desktop{display:flex;position:-webkit-sticky;position:sticky;top:28px;max-height:calc(100dvh - 56px);overflow-y:auto;overscroll-behavior:contain}.reading-detail-backdrop,.reading-detail-mobile{display:none}}.generated-reading-text .reading-target-word{display:inline;padding:0 2px;border:0;border-radius:4px;background:color-mix(in srgb,var(--primary) 22%,transparent);color:var(--primary-strong);font:inherit;font-weight:680;line-height:inherit;cursor:pointer;-webkit-box-decoration-break:clone;box-decoration-break:clone}.generated-reading-text .reading-target-word:hover,.generated-reading-text .reading-target-word[aria-expanded=true]{background:color-mix(in srgb,var(--primary) 36%,transparent)}.reading-word-popover{position:fixed;z-index:90;width:min(280px,calc(100vw - 24px));max-height:min(300px,calc(100dvh - 24px));overflow:auto;display:grid;grid-gap:9px;gap:9px;padding:15px;border:1px solid var(--border-strong);border-radius:14px;background:var(--surface-raised);box-shadow:var(--shadow);font-size:.86rem;line-height:1.4}.reading-word-popover-head{display:grid;grid-gap:3px;gap:3px}.reading-word-popover-head strong{color:var(--text);font-size:1rem}.reading-word-popover-head small{color:var(--text-muted)}.reading-word-popover p{margin:0;overflow-wrap:anywhere}.reading-word-popover .text-link{margin-top:2px;font-size:.78rem}.reading-assessment{display:grid;grid-gap:22px;gap:22px}.reading-question-list{gap:22px}.reading-question{min-width:0;gap:15px;padding:19px 0 0}.reading-question legend{width:100%;display:flex;align-items:flex-start;gap:11px;padding:0}.reading-question-number{width:34px;height:34px;flex:0 0 34px;display:grid;place-items:center;border:1px solid var(--border);border-radius:10px;color:var(--text-muted);font-family:var(--font-geist-mono),"Geist Mono",monospace;font-size:.72rem}.reading-question-heading{display:grid;grid-gap:8px;gap:8px;min-width:0}.reading-question-heading .badge{width:-moz-fit-content;width:fit-content}.reading-question-heading strong{color:var(--text);font-size:.98rem;line-height:1.45}.reading-question-options{gap:9px}.reading-question-option{min-height:52px;display:flex;align-items:center;gap:12px;padding:10px 13px;border:1px solid var(--border);border-radius:12px;background:var(--surface-raised);cursor:pointer;transition:border-color .14s ease,background .14s ease}.reading-question-option:hover{border-color:var(--border-strong)}.reading-question-option:has(input:checked){border-color:var(--primary);background:var(--primary-soft)}.reading-question-option.is-correct{border-color:var(--success);background:var(--success-soft)}.reading-question-option.is-correct .reading-option-letter{border-color:var(--success);color:var(--success)}.reading-question:has(.reading-answer-feedback.is-wrong) .reading-question-option:has(input:checked):not(.is-correct){border-color:var(--danger);background:var(--danger-soft)}.reading-question-option:has(input:focus-visible){outline:2px solid var(--primary-strong);outline-offset:2px}.reading-question-option input{position:absolute;opacity:0;width:1px;height:1px}.reading-option-letter{width:27px;height:27px;flex:0 0 27px;display:grid;place-items:center;border:1px solid var(--border-strong);border-radius:8px;color:var(--text-muted);font-family:var(--font-geist-mono),"Geist Mono",monospace;font-size:.7rem}.reading-question-option:has(input:checked) .reading-option-letter{border-color:var(--primary);color:var(--primary-strong)}.reading-option-text{color:var(--text-soft);line-height:1.45}.reading-answer-feedback{margin:0;padding:11px 13px;border-radius:10px;font-size:.83rem;line-height:1.5}.reading-answer-feedback.is-correct{background:var(--success-soft);color:var(--success)}.reading-answer-feedback.is-wrong{background:var(--danger-soft);color:var(--danger)}.grammar-detail,.grammar-hub{gap:18px}.grammar-detail-hero,.grammar-hero{display:flex;flex-direction:column;gap:14px;padding:14px 0 2px}.grammar-detail-hero h1,.grammar-hero h1{margin:3px 0 0;max-width:820px;font-size:clamp(2.25rem,11vw,4.8rem);line-height:.96;letter-spacing:-.055em;font-weight:560}.grammar-level-path{width:-moz-fit-content;width:fit-content;display:flex;align-items:center;gap:10px;padding:10px 12px;border:1px solid var(--border);border-radius:15px;background:var(--surface)}.grammar-level-path>span{display:flex;flex-direction:column;gap:1px}.grammar-level-path small{color:var(--text-muted);font-size:.62rem}.grammar-level-path strong{font-family:var(--font-geist-mono),"Geist Mono",monospace;font-size:.95rem}.grammar-level-path>svg{color:var(--text-muted)}.grammar-summary{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));overflow:hidden;border:1px solid var(--border);border-radius:16px;background:var(--surface)}.grammar-summary>div{min-height:72px;display:flex;flex-direction:column;justify-content:center;gap:3px;padding:11px 12px}.grammar-summary>div:nth-child(2n){border-left:1px solid var(--border)}.grammar-summary>div:nth-child(n+3){border-top:1px solid var(--border)}.grammar-summary strong{font-family:var(--font-geist-mono),"Geist Mono",monospace;font-size:1.25rem}.grammar-summary span{color:var(--text-muted);font-size:.66rem}.grammar-list{display:flex;flex-direction:column;border-block:1px solid var(--border)}.grammar-concept-row{min-height:76px;display:grid;grid-template-columns:minmax(0,1fr) 18px;align-items:center;grid-gap:12px;gap:12px;padding:11px 2px}.grammar-concept-row+.grammar-concept-row{border-top:1px solid var(--border)}.grammar-concept-row>svg{color:var(--text-muted)}.grammar-concept-main{min-width:0;display:flex;flex-direction:column;gap:5px}.grammar-concept-main strong{font-size:.92rem}.grammar-concept-main small{overflow:hidden;color:var(--text-muted);font-size:.68rem;line-height:1.4;text-overflow:ellipsis;white-space:nowrap}.grammar-state{min-height:25px;display:inline-flex;align-items:center;width:-moz-fit-content;width:fit-content;padding:0 8px;border:1px solid var(--border);border-radius:999px;font-family:var(--font-geist-mono),"Geist Mono",monospace;font-size:.62rem;color:var(--text-soft);background:var(--surface-raised)}.grammar-state-needs_attention{border-color:rgba(255,107,122,.28);color:#ffc2c9;background:var(--danger-soft)}.grammar-state-learning{border-color:rgba(139,124,255,.28);color:#d7d2ff;background:var(--primary-soft)}.grammar-state-strong{border-color:rgba(73,201,139,.25);color:#b8f2d4;background:var(--success-soft)}.grammar-state-assumed{border-color:var(--border);color:var(--text-muted)}.grammar-priority-section .section-heading>svg{color:var(--danger)}.grammar-category-strip,.grammar-filter-strip{display:flex;gap:7px;overflow-x:auto;padding-bottom:4px;scrollbar-width:none}.grammar-category-strip::-webkit-scrollbar,.grammar-filter-strip::-webkit-scrollbar{display:none}.grammar-category-strip a,.grammar-filter-strip a{flex:0 0 auto;min-height:38px;display:inline-flex;align-items:center;padding:0 11px;border:1px solid var(--border);border-radius:999px;color:var(--text-muted);background:var(--surface);font-size:.7rem}.grammar-category-strip a.is-active,.grammar-filter-strip a.is-active{color:var(--text);border-color:var(--primary);background:var(--primary-soft)}.grammar-detail-actions{display:flex;flex-direction:column;gap:8px}.grammar-detail-actions form{display:contents}.grammar-profile-card,.grammar-teaching-card,.grammar-watch-card{display:flex;flex-direction:column;gap:12px}.grammar-profile-card h2,.grammar-teaching-card h2,.grammar-watch-card h2{margin:3px 0 0;font-size:1.05rem}.grammar-dimensions{display:grid;grid-template-columns:1fr;grid-gap:7px;gap:7px}.grammar-dimensions>div{min-height:52px;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:9px 11px;border:1px solid var(--border);border-radius:12px;background:var(--surface-raised)}.grammar-dimensions span{color:var(--text-muted);font-size:.72rem}.grammar-dimensions strong{color:var(--text-soft);font-size:.72rem}.grammar-detail-grid{display:grid;grid-template-columns:1fr;grid-gap:10px;gap:10px}.grammar-rule-list,.grammar-teaching-card>p:last-child,.grammar-watch-card p{margin:0;color:var(--text-soft);line-height:1.62}.grammar-rule-list{padding-left:20px}.grammar-rule-list li+li{margin-top:8px}.grammar-example-list{display:grid;grid-template-columns:1fr;grid-gap:8px;gap:8px}.grammar-example{padding:14px 15px;border:1px solid var(--border);border-radius:14px;background:var(--surface);font-size:.94rem;line-height:1.55}.grammar-watch-card{display:grid;grid-template-columns:24px minmax(0,1fr);align-items:start}.grammar-watch-card>svg{color:var(--danger)}.grammar-watch-card ul{margin:10px 0 0;padding-left:18px;color:var(--text-muted)}.grammar-connection-list,.grammar-vocab-grid{display:grid;grid-template-columns:1fr;grid-gap:8px;gap:8px}.grammar-connection-list a,.grammar-vocab-grid a{min-height:58px;display:flex;flex-direction:column;justify-content:center;gap:3px;padding:10px 12px;border:1px solid var(--border);border-radius:13px;background:var(--surface)}.grammar-connection-list span,.grammar-vocab-grid span{color:var(--text-muted);font-size:.65rem}.grammar-connection-list strong,.grammar-vocab-grid strong{font-size:.8rem}.grammar-vocab-note{margin:-4px 0 0;max-width:720px;font-size:.72rem;line-height:1.5}.grammar-evidence-disclosure{padding:0;overflow:hidden}.grammar-evidence-disclosure>summary{min-height:62px;display:flex;align-items:center;padding:12px 14px;list-style:none}.grammar-evidence-disclosure>summary::-webkit-details-marker{display:none}.grammar-evidence-disclosure summary span{display:flex;flex-direction:column;gap:3px}.grammar-evidence-disclosure summary strong{color:var(--text);font-size:.85rem}.grammar-evidence-disclosure summary small{color:var(--text-muted);font-size:.65rem}.grammar-evidence-list{padding:0 14px 14px}.grammar-evidence-list>div{padding:10px 0;border-top:1px solid var(--border)}.grammar-evidence-list>div>div{display:flex;justify-content:space-between;gap:12px}.grammar-evidence-list small,.grammar-evidence-list span,.grammar-evidence-list strong{font-size:.68rem}.grammar-evidence-list small,.grammar-evidence-list span{color:var(--text-muted)}.grammar-related{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.grammar-related>p{width:100%}.grammar-related a{min-height:38px;display:inline-flex;align-items:center;gap:6px;padding:0 10px;border:1px solid var(--border);border-radius:999px;color:var(--text-soft);font-size:.7rem}@media (min-width:620px){.grammar-summary{grid-template-columns:repeat(4,minmax(0,1fr))}.grammar-summary>div:nth-child(n+3){border-top:0}.grammar-summary>div+div{border-left:1px solid var(--border)}.grammar-detail-actions{flex-direction:row}.grammar-detail-actions .button{width:auto}.grammar-dimensions{grid-template-columns:repeat(3,minmax(0,1fr))}.grammar-connection-list,.grammar-detail-grid,.grammar-example-list,.grammar-vocab-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (min-width:940px){.grammar-hero{flex-direction:row;align-items:end;justify-content:space-between}.grammar-level-path{margin-bottom:8px}.grammar-connection-list,.grammar-vocab-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}.grammar-link-list{display:flex;flex-direction:column;border-top:1px solid var(--border)}.grammar-link-row{min-height:62px;display:grid;grid-template-columns:minmax(0,1fr) auto 18px;align-items:center;grid-gap:10px;gap:10px;padding:10px 0}.grammar-link-row+.grammar-link-row{border-top:1px solid var(--border)}.grammar-link-row>span:first-child{min-width:0;display:flex;flex-direction:column;gap:3px}.grammar-link-row strong{font-size:.82rem}.grammar-link-row small{overflow:hidden;color:var(--text-muted);font-size:.66rem;text-overflow:ellipsis;white-space:nowrap}.grammar-link-row>svg{color:var(--text-muted)}.grammar-canonical-reference,.grammar-cheat-sheet,.grammar-lesson-missing,.grammar-lesson-section{display:grid;grid-gap:12px;gap:12px}.grammar-canonical-reference>h2,.grammar-cheat-sheet>h2,.grammar-lesson-missing>h2,.grammar-lesson-section>h2{margin:0;font-size:1.08rem}.grammar-canonical-reference>p,.grammar-cheat-sheet p,.grammar-lesson-section p{margin:0;color:var(--text-soft);line-height:1.65}.grammar-canonical-reference details{border-top:1px solid var(--border);padding-top:10px}.grammar-canonical-reference summary{cursor:pointer;color:var(--text-soft);font-weight:650;font-size:.78rem}.grammar-canonical-reference details>:not(summary){margin-top:10px}.grammar-full-lesson{display:grid;grid-gap:18px;gap:18px}.grammar-lesson-lead{max-width:78ch;display:grid;grid-gap:10px;gap:10px;padding:10px 2px 2px}.grammar-lesson-lead h2{margin:0;font-size:clamp(1.55rem,5vw,2.25rem);letter-spacing:-.035em}.grammar-lesson-lead>p{margin:0;color:var(--text-soft);font-size:1rem;line-height:1.75}.grammar-lesson-intuition{margin-top:4px;padding:16px;border-left:3px solid var(--primary);background:var(--surface);border-radius:0 14px 14px 0}.grammar-lesson-intuition strong{display:block;margin-bottom:6px}.grammar-lesson-intuition p{margin:0;color:var(--text-soft);line-height:1.68}.grammar-lesson-two-column{display:grid;grid-template-columns:1fr;grid-gap:10px;gap:10px}.grammar-cheat-sheet ul,.grammar-lesson-section ol,.grammar-lesson-section ul{margin:0;padding-left:20px;color:var(--text-soft);line-height:1.62}.grammar-cheat-sheet li+li,.grammar-lesson-section li+li{margin-top:8px}.grammar-lesson-steps{counter-reset:grammar-step}.grammar-lesson-steps ol{list-style:none;padding:0;display:grid;grid-gap:10px;gap:10px}.grammar-lesson-steps li{counter-increment:grammar-step;display:grid;grid-template-columns:30px minmax(0,1fr);grid-gap:10px;gap:10px;align-items:start}.grammar-lesson-steps li:before{content:counter(grammar-step);width:28px;height:28px;display:grid;place-items:center;border:1px solid var(--border);border-radius:999px;font-family:var(--font-geist-mono),"Geist Mono",monospace;font-size:.7rem;color:var(--text-muted)}.grammar-lesson-tables{display:grid;grid-gap:10px;gap:10px}.grammar-lesson-table-card{overflow:hidden}.grammar-lesson-table-card h3{margin:0 0 10px;font-size:.92rem}.grammar-table-scroll{width:100%;overflow-x:auto}.grammar-table-scroll table{width:100%;min-width:460px;border-collapse:collapse;font-size:.78rem}.grammar-table-scroll td,.grammar-table-scroll th{padding:9px 10px;text-align:left;border-bottom:1px solid var(--border);vertical-align:top}.grammar-table-scroll th{color:var(--text-muted);font-size:.67rem;text-transform:uppercase;letter-spacing:.05em}.grammar-contrast-list,.grammar-mistake-examples,.grammar-rich-example-list{display:grid;grid-template-columns:1fr;grid-gap:9px;gap:9px}.grammar-contrast-card,.grammar-mistake-example,.grammar-rich-example{display:grid;grid-gap:8px;gap:8px}.grammar-rich-example>strong{font-size:1rem;line-height:1.5}.grammar-contrast-card p,.grammar-mistake-example p,.grammar-rich-example>p,.grammar-rich-example>small{margin:0}.grammar-contrast-card p,.grammar-mistake-example .muted,.grammar-rich-example>p{color:var(--text-soft);line-height:1.55}.grammar-rich-example>small{color:var(--text-muted);line-height:1.45}.grammar-contrast-card h3{margin:0;font-size:.9rem}.grammar-contrast-card>div{padding-top:8px;border-top:1px solid var(--border)}.grammar-contrast-card>div>strong{display:block;margin-bottom:4px;font-size:.68rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em}.grammar-correct,.grammar-wrong{line-height:1.5}.grammar-correct span,.grammar-wrong span{display:inline-block;min-width:38px;margin-right:6px;color:var(--text-muted);font-size:.67rem;text-transform:uppercase;letter-spacing:.05em}.grammar-cheat-sheet{border-color:rgba(139,124,255,.32);background:var(--primary-soft)}.grammar-teach-sheet .teach-sheet-header small{display:block;margin-top:4px;text-transform:capitalize}@media (min-width:700px){.grammar-contrast-list,.grammar-lesson-two-column,.grammar-mistake-examples,.grammar-rich-example-list{grid-template-columns:repeat(2,minmax(0,1fr))}}@font-face{font-family:GeistSans;src:url(/_next/static/media/0b78ff376f6b9734-s.p.woff2) format("woff2");font-display:swap;font-weight:100 900}@font-face{font-family:GeistSans Fallback;src:local("Arial");ascent-override:94.56%;descent-override:27.76%;line-gap-override:0.00%;size-adjust:106.28%}.__className_8adcd2{font-family:GeistSans,GeistSans Fallback}.__variable_8adcd2{--font-geist-sans:"GeistSans","GeistSans Fallback"}@font-face{font-family:GeistMono;src:url(/_next/static/media/723e11e5093b8e80.p.woff2) format("woff2");font-display:swap;font-weight:100 900}.__className_46451f{font-family:GeistMono,ui-monospace,SFMono-Regular,Roboto Mono,Menlo,Monaco,Liberation Mono,DejaVu Sans Mono,Courier New,monospace}.__variable_46451f{--font-geist-mono:"GeistMono",ui-monospace,SFMono-Regular,Roboto Mono,Menlo,Monaco,Liberation Mono,DejaVu Sans Mono,Courier New,monospace}@font-face{font-family:IRANYekan;src:url(/fonts/iranyekan/iranyekan-regular.ttf) format("truetype");font-style:normal;font-weight:400;font-display:swap}@font-face{font-family:IRANYekan;src:url(/fonts/iranyekan/iranyekan-medium.ttf) format("truetype");font-style:normal;font-weight:500;font-display:swap}@font-face{font-family:IRANYekan;src:url(/fonts/iranyekan/iranyekan-bold.ttf) format("truetype");font-style:normal;font-weight:700;font-display:swap}@font-face{font-family:IRANYekan;src:url(/fonts/iranyekan/iranyekan-extrabold.ttf) format("truetype");font-style:normal;font-weight:800;font-display:swap}:root{--font-ui-ltr:var(--font-geist-sans),ui-sans-serif,system-ui,sans-serif;--font-ui-rtl:"IRANYekan",Tahoma,Arial,sans-serif;--font-ui:var(--font-ui-ltr)}html[dir=rtl]{--font-ui:var(--font-ui-rtl)}body{font-family:var(--font-ui)}.learning-content{unicode-bidi:-webkit-isolate;unicode-bidi:isolate;text-align:start}html[dir=rtl] .rtl-mirror{transform:scaleX(-1)}