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var(--font-scale));gap:6px;display:grid}.single-entry-grid input{border:1px solid var(--line-strong);background:var(--paper);width:100%;min-height:42px;color:var(--ink);border-radius:6px;padding:9px 11px}.single-entry-grid__wide{grid-column:1/-1}.file-drop{border:1px dashed var(--line-strong);min-height:116px;color:var(--muted);cursor:pointer;font-size:calc(13px * var(--font-scale));border-radius:6px;flex-direction:column;justify-content:center;align-items:center;gap:10px;display:flex}.file-drop:hover{border-color:var(--green);color:var(--green);background:var(--green-soft)}.file-drop input{opacity:0;width:1px;height:1px;position:absolute}.url-input{color:var(--muted);grid-template-columns:20px 1fr auto;align-items:center;gap:10px;display:grid}.url-input input{min-width:0;min-height:43px;padding:8px 11px}.url-input button{border:1px solid var(--ink);background:var(--ink);min-height:43px;color:var(--selection-text);cursor:pointer;border-radius:5px;padding:8px 15px}.paste-input{gap:10px;display:grid}.paste-input textarea{resize:vertical;width:100%;min-height:120px;padding:11px;line-height:1.6}.paste-input .secondary-button{justify-self:end}.import-error{border-left:3px solid var(--coral);background:var(--coral-soft);color:var(--danger-ink);font-size:calc(12px * var(--font-scale));align-items:flex-start;gap:8px;margin:14px 0;padding:10px 12px;display:flex}.mapping-section,.preview-section{border-top:1px solid var(--line);margin-top:20px;padding-top:20px}.mapping-section h3{font-size:calc(14px * var(--font-scale));margin:0 0 13px}.mapping-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 14px;margin-bottom:14px;display:grid}.mapping-grid label{min-width:0;color:var(--muted);font-size:calc(11px * var(--font-scale));grid-template-columns:minmax(0,1fr) 140px;align-items:center;gap:9px;display:grid}.mapping-grid label>span{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.mapping-grid select{min-width:0;min-height:34px;font-size:calc(11px * var(--font-scale));padding:5px 7px}.preview-counts{border-top:1px solid var(--ink);border-bottom:1px solid var(--line);grid-template-columns:repeat(3,1fr);display:grid}.preview-counts>span{border-right:1px solid var(--line);min-height:62px;color:var(--muted);font-size:calc(11px * var(--font-scale));justify-content:center;align-items:center;gap:7px;display:flex}.preview-counts>span:last-child{border-right:0}.preview-counts strong{color:var(--ink);font-size:calc(21px * var(--font-scale))}.preview-counts .has-error strong{color:var(--coral)}.preview-table{margin-bottom:15px}.preview-table>div{border-bottom:1px solid var(--line);min-height:43px;font-size:calc(11px * var(--font-scale));grid-template-columns:30px 110px minmax(120px,1fr) 110px;align-items:center;gap:10px;display:grid}.preview-table>div>span,.preview-table small{color:var(--muted)}.preview-table small{text-align:right}.preview-section>.primary-button{margin-left:auto}.import-done{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:360px;display:flex}.import-done>span{width:58px;height:58px;color:var(--on-accent);background:var(--green-action);border-radius:50%;place-items:center;margin-bottom:18px;display:grid}.import-done p{color:var(--muted);font-size:calc(13px * var(--font-scale));margin:8px 0 20px}.practice-back{z-index:10;top:18px;left:calc(var(--sidebar-width) + 22px);color:var(--muted);cursor:pointer;font-size:calc(13px * var(--font-scale));background:0 0;border:0;align-items:center;gap:5px;padding:8px 10px;display:inline-flex;position:fixed}.practice-page{grid-template-rows:auto auto minmax(min-content,1fr);width:min(100%,980px);min-height:100vh;margin:0 auto;padding:68px 50px 50px;display:grid}.practice-header{grid-template-columns:1fr auto;align-items:center;gap:20px;display:grid;position:relative}.practice-progress-copy{color:var(--muted);font-size:calc(12px * var(--font-scale));justify-content:space-between;padding-right:10px;display:flex}.practice-progress{background:var(--track);border-radius:2px;grid-column:1;height:6px;margin-top:-9px;overflow:hidden}.practice-progress span{background:var(--green-gradient);height:100%;transition:width .22s;display:block;box-shadow:0 0 6px #2f7a5559}.practice-header>.segmented{grid-area:1/2/3}.practice-modes{border-top:1px solid var(--line);justify-content:center;gap:10px;margin-top:32px;padding-top:24px;display:flex}.practice-modes .segmented{grid-auto-columns:minmax(75px,auto)}.practice-modes .segmented button{min-height:33px;font-size:calc(12px * var(--font-scale));padding:5px 13px}.question-surface{align-self:center;width:100%;max-width:760px;margin:clamp(28px,5vh,48px) auto}.question-prompt{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:180px;display:flex}.question-prompt .prompt-label{color:var(--muted);font-size:calc(13px * var(--font-scale));margin-bottom:18px}.question-prompt h1{max-width:690px;font-size:calc(29px * var(--font-scale));line-height:1.48}.choice-prompt-heading{justify-content:center;align-items:center;gap:12px;max-width:690px;display:flex}.prompt-audio-button{border:1px solid var(--line-strong);background:var(--surface);width:36px;height:36px;color:var(--green);cursor:pointer;border-radius:50%;flex:0 0 36px;place-items:center;padding:0;display:grid}.prompt-audio-button:hover{border-color:var(--green);background:var(--green-soft)}.question-prompt>span{color:var(--muted);font-size:calc(12px * var(--font-scale));align-items:center;gap:6px;margin-top:13px;display:inline-flex}.audio-button{border:1px solid var(--green-action);background:var(--green-action);width:74px;height:74px;color:var(--on-accent);cursor:pointer;border-radius:50%;place-items:center;display:grid}.audio-button:hover{background:var(--green-action-hover)}.choice-grid{grid-template-columns:repeat(2,1fr);gap:10px;margin-top:22px;display:grid}.choice-grid button{border:1px solid var(--line-strong);border-radius:var(--radius-md);background:var(--surface);min-height:70px;box-shadow:var(--shadow-sm);cursor:pointer;text-align:left;justify-content:space-between;align-items:center;gap:20px;padding:13px 17px;transition:border-color .14s,background .14s,box-shadow .14s,transform .14s;display:flex}.choice-grid button:not(:disabled):hover{border-color:var(--green);background:var(--green-soft);box-shadow:var(--shadow-md);transform:translateY(-2px)}.choice-grid button span{color:var(--muted);font-size:calc(12px * var(--font-scale))}.choice-grid button.is-correct{border-color:var(--success-highlight);background:var(--success-highlight);color:var(--success-highlight-ink);box-shadow:none;opacity:1}.choice-grid button.is-correct span{color:color-mix(in srgb, var(--success-highlight-ink) 72%, transparent)}.choice-grid button.is-wrong{border-color:var(--coral);background:var(--coral-soft);color:var(--danger-ink);opacity:1;animation:.32s shake}.dictation-form{grid-template-columns:1fr auto;gap:10px;margin-top:22px;display:grid}.dictation-form input{border:1px solid var(--line-strong);min-width:0;min-height:50px;color:var(--ink);background:var(--surface);font-size:calc(17px * var(--font-scale));border-radius:6px;padding:10px 15px}.dictation-form .primary-button{min-height:50px}.question-tools{justify-content:center;gap:14px;margin-top:20px;display:flex}.question-tools button{color:var(--muted);cursor:pointer;font-size:calc(12px * var(--font-scale));background:0 0;border:0;align-items:center;gap:7px;padding:8px 10px;display:inline-flex}.question-tools button:hover{color:var(--ink)}.answer-feedback{border-top:1px solid var(--line);margin-top:28px;padding:22px 0 0}.answer-feedback--correct{min-height:88px;color:var(--success-highlight-ink);background:var(--success-highlight);border:0;border-radius:8px;align-items:center;gap:20px;margin-top:20px;padding:16px 20px;animation:.22s ease-out feedback-enter;display:flex}.answer-feedback--correct .feedback-title{flex:1;align-items:center;min-width:0}.answer-feedback--correct .feedback-title>span{border:1px solid color-mix(in srgb, var(--success-highlight-ink) 22%, transparent);width:44px;height:44px;color:var(--success-highlight-ink);background:0 0;flex-basis:44px}.answer-feedback--correct .feedback-title strong{font-size:calc(16px * var(--font-scale))}.answer-feedback--correct .feedback-title p{color:var(--success-highlight-ink);overflow-wrap:anywhere;margin-top:3px;line-height:1.45}.answer-feedback--correct .feedback-title p b{margin-right:4px}.answer-next-button{color:#fff;cursor:pointer;background:#111512;border:0;border-radius:50%;flex:0 0 50px;place-items:center;width:50px;height:50px;padding:0;transition:transform .14s,background .14s;display:grid}.answer-next-button:hover{background:#000;transform:translate(2px)}.answer-next-button:focus-visible{outline:2px solid var(--success-highlight-ink);outline-offset:3px}@keyframes feedback-enter{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.feedback-title{align-items:flex-start;gap:12px;display:flex}.feedback-title>span{width:32px;height:32px;color:var(--on-accent);background:var(--green-action);border-radius:50%;flex:0 0 32px;place-items:center;animation:.26s cubic-bezier(.34,1.56,.64,1) pop;display:grid}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-5px)}75%{transform:translate(5px)}}@keyframes pop{0%{opacity:0;transform:scale(.6)}to{opacity:1;transform:scale(1)}}.question-surface--wrong .feedback-title>span,.question-surface--revealed .feedback-title>span{background:var(--coral)}.feedback-title svg{width:18px}.feedback-title p{color:var(--muted);font-size:calc(12px * var(--font-scale));margin-top:4px}.expected-answer{border-left:3px solid var(--green);background:var(--green-soft);flex-direction:column;gap:7px;margin:20px 0;padding:16px;display:flex}.question-surface--wrong .expected-answer,.question-surface--revealed .expected-answer{border-left-color:var(--coral);background:var(--coral-soft)}.expected-answer>span,.expected-answer small{color:var(--muted);font-size:calc(11px * var(--font-scale))}.expected-answer strong{font-size:calc(17px * var(--font-scale));line-height:1.5}.sentence-diff{flex-wrap:wrap;gap:6px;margin-top:5px;display:flex}.sentence-diff span{font-size:calc(12px * var(--font-scale));border-radius:3px;padding:2px 4px}.sentence-diff .diff-same{color:var(--green-deep)}.sentence-diff .diff-changed,.sentence-diff .diff-extra{color:var(--danger-ink);background:var(--coral-mark);text-decoration:line-through}.sentence-diff .diff-missing{color:var(--danger-ink);border-bottom:1px dashed var(--coral)}.answer-feedback>.primary-button{margin-left:auto}.practice-empty,.practice-summary{text-align:center;flex-direction:column;justify-content:center;align-items:center;max-width:620px;display:flex}.practice-empty>svg,.summary-icon{width:64px;height:64px;color:var(--on-accent);background:var(--green-action);border-radius:50%;place-items:center;margin-bottom:22px;display:grid}.practice-empty p,.practice-summary>p:not(.section-label){max-width:480px;color:var(--muted);font-size:calc(14px * var(--font-scale));margin:10px 0 24px;line-height:1.6}.summary-stats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);grid-template-columns:repeat(2,1fr);width:min(100%,360px);margin:10px 0 28px;display:grid}.summary-stats>div{border-right:1px solid var(--line);flex-direction:column;justify-content:center;gap:5px;min-height:84px;display:flex}.summary-stats>div:last-child{border-right:0}.summary-stats strong{font-size:calc(25px * var(--font-scale))}.summary-stats span{color:var(--muted);font-size:calc(11px * var(--font-scale))}.mobile-nav{display:none}@media (width<=1300px){.start-controls{flex-wrap:wrap;justify-content:flex-start;width:100%}}@media (width<=900px){.word-search-backdrop{place-items:stretch stretch;padding:0}.word-search-dialog{border:0;border-radius:0;width:100%;max-height:100dvh}.word-search-header{z-index:2;padding:max(12px, env(safe-area-inset-top)) 12px 12px;background:var(--surface);position:sticky;top:0}.word-search-content,.word-search-content.has-detail{min-height:0;height:calc(100dvh - 71px - env(safe-area-inset-top));max-height:none;display:block}.word-search-content.has-detail .word-search-results{display:none}.word-search-results,.word-search-detail{height:100%}.word-search-detail{border-left:0}.word-search-detail-back{width:max-content;color:var(--green);cursor:pointer;background:0 0;border:0;margin-bottom:22px;padding:0;display:flex}.word-search-title-row{flex-wrap:wrap;align-items:flex-start}.sidebar-search{display:none}.page{padding-inline:34px}.start-controls{justify-content:space-between}.book-row{grid-template-columns:44px minmax(160px,1fr) 64px 64px 62px}.book-row .coverage{display:none}}@media (width<=640px){:root{--bottom-nav-height:70px}h1{font-size:calc(27px * var(--font-scale))}h2{font-size:calc(17px * var(--font-scale))}.sidebar{display:none}.main-content{padding-bottom:var(--bottom-nav-height);margin-left:0}.page{width:100%;min-height:calc(100vh - var(--bottom-nav-height));padding:26px 20px 34px}.page-header{margin-bottom:28px}.date-label{font-size:calc(12px * var(--font-scale))}.segmented--compact{grid-auto-columns:58px}.segmented--compact button{padding-inline:8px}.today-summary{padding-bottom:24px}.today-title-row h1{font-size:calc(23px * var(--font-scale))}.today-title-row{flex-direction:column;align-items:flex-start;gap:18px}.today-progress-copy{margin-top:28px}.section-heading-row{align-items:flex-start}.today-actions{margin-top:20px}.today-actions .start-controls{width:100%}.start-controls{gap:12px;display:grid}.start-controls .segmented{grid-auto-columns:1fr}.primary-button{width:100%}.mobile-nav{z-index:30;height:var(--bottom-nav-height);border-top:1px solid var(--line);background:var(--mobile-nav-background);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);grid-template-columns:repeat(5,1fr);display:grid;position:fixed;inset:auto 0 0}.mobile-nav button{min-width:0;color:var(--muted);font-size:calc(10px * var(--font-scale));flex-direction:column;justify-content:center;align-items:center;gap:4px;display:flex}.mobile-nav button.is-active{color:var(--green);font-weight:650}.header-actions{grid-template-columns:42px 42px;display:grid}.header-actions button{color:#0000;gap:0;width:42px;padding:0;overflow:hidden}.header-actions button svg{color:var(--ink);flex:none}.header-actions .primary-button svg{color:var(--on-accent)}.book-row{grid-template-columns:38px minmax(0,1fr) 48px 48px;gap:10px}.book-row .book-stat:nth-of-type(4){display:none}.row-icon{width:34px;height:34px}.book-main strong{overflow-wrap:anywhere}.filter-bar{align-items:stretch}.wrong-filters{grid-template-columns:1fr}.wrong-row{grid-template-columns:1fr auto}.wrong-row>span:first-of-type{display:none}.filter-bar .segmented{grid-auto-columns:minmax(84px,1fr)}.filter-bar .icon-text-button{min-width:42px;padding-inline:10px;font-size:0}.stats-strip{grid-template-columns:repeat(2,1fr)}.stats-strip>div{border-bottom:1px solid var(--line);min-height:94px;padding-left:18px}.stats-strip>div:nth-child(2){border-right:0}.stats-strip>div:nth-child(n+3){border-bottom:0}.stats-strip>div:nth-child(3){padding-left:18px}.streak-section>div{padding-inline:18px}.book-mastery-row{grid-template-columns:1fr;gap:10px}.activity-chart{gap:5px}.activity-chart small{display:none}.setting-row{gap:12px}.backup-actions{display:grid}.feedback-dialog .segmented{grid-template-columns:repeat(3,minmax(0,1fr));grid-auto-columns:auto}.feedback-dialog .segmented button{padding-inline:7px}.feedback-dialog-actions{grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.feedback-dialog-actions>button{width:100%}.feedback-dialog-actions>button:only-child{grid-column:1/-1}.practice-back{top:8px;left:8px}.main-content:has(.practice-page){padding-bottom:0}.practice-page{width:100%;padding:60px 20px 30px}.practice-header{grid-template-columns:1fr auto}.practice-modes{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;display:grid}.practice-modes .segmented{grid-auto-columns:1fr;width:100%;min-width:0}.practice-modes .segmented:nth-child(3){grid-column:1/-1}.practice-modes .segmented:only-child{grid-column:1/-1;justify-self:center;width:min(100%,180px)}.practice-modes .segmented button{padding-inline:10px}.question-surface{margin-top:30px}.question-prompt{min-height:155px}.question-prompt h1{font-size:calc(23px * var(--font-scale))}.choice-grid{grid-template-columns:1fr}.choice-grid button{min-height:58px}.dictation-form{grid-template-columns:1fr}.answer-feedback>.primary-button{margin-left:0}.answer-feedback--correct{gap:12px;min-height:82px;padding:14px}.answer-feedback--correct .feedback-title>span{flex-basis:38px;width:38px;height:38px}.answer-next-button{flex-basis:44px;width:44px;height:44px}.dialog-backdrop{align-items:end;padding:0}.dialog{width:100%;max-height:92vh;padding:22px 20px calc(22px + env(safe-area-inset-bottom));border-radius:8px 8px 0 0}.mapping-grid{grid-template-columns:1fr}.mapping-grid label{grid-template-columns:minmax(0,1fr) 130px}.preview-table>div{grid-template-columns:24px 82px minmax(0,1fr)}.preview-table small{display:none}.single-entry-grid{grid-template-columns:1fr}.single-entry-grid__wide{grid-column:auto}}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--ink:#e6ede9;--muted:#a2aea7;--faint:#171e1a;--line:#29332e;--line-strong:#3d4942;--green:#54a978;--green-deep:#3f8b62;--green-action:#347f59;--green-action-hover:#286c49;--green-soft:#162c20;--coral:#ef7464;--coral-soft:#36211e;--danger-ink:#ffaca2;--selection:#dce7e0;--selection-text:#111713;--surface:#0f1412;--track:#252e29;--coral-mark:#ef74642e;--dialog-overlay:#000000a3;--dialog-shadow:#00000061;--mobile-nav-background:#0f1412f5;--card:#141b18;--card-raised:#182019;--shadow-sm:0 1px 2px #0000004d;--shadow-md:0 4px 14px #00000061;--shadow-lg:0 14px 36px #0000007a;--green-gradient:linear-gradient(135deg, #3f8f63 0%, #347f59 100%)}}@media (prefers-reduced-motion:reduce){:root:not([data-reduce-motion]) *,:root:not([data-reduce-motion]) :before,:root:not([data-reduce-motion]) :after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}:root[data-reduce-motion=true] *,:root[data-reduce-motion=true] :before,:root[data-reduce-motion=true] :after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}.auth-loading{min-height:100vh;color:var(--muted);font-size:calc(13px * var(--font-scale));justify-content:center;align-items:center;gap:10px;display:flex}.auth-screen{background:var(--surface);align-items:center;min-height:100dvh;padding:48px 28px;display:grid}.auth-panel{border-top:3px solid var(--green);width:min(100%,420px);margin:0 auto;padding:34px 0 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