:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;font-synthesis:none;font-feature-settings:"calt", "kern", "liga", "ss03";--canvas:#111214;--surface:#18191c;--surface-elevated:#202125;--surface-card:#292a2f;--surface-hover:#24252a;--ink:#f4f3f1;--muted:#aaa8a5;--quiet:#777673;--hairline:#34353a;--hairline-strong:#505157;--accent:#dc520c;--accent-hover:#ed6019;--accent-soft:#3b241a;--accent-border:#6a351d;--success:#32d16d;--success-soft:#143522;--danger:#ff4f5e;--danger-soft:#3b1b20;--warning:#e58a2e;--radius-xs:4px;--radius-sm:7px;--radius-md:10px;--radius-lg:14px;--content-width:1240px;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,SF Pro Text,Segoe UI,sans-serif}*{box-sizing:border-box}html{background:var(--canvas)}body{background:var(--canvas);min-width:320px;min-height:100dvh;color:var(--ink);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;margin:0;font-size:16px;line-height:1.55}button,input{font:inherit}button{color:inherit}button,a{touch-action:manipulation}button:focus-visible,input:focus-visible{outline-offset:2px;outline:2px solid #fff}h1,h2,h3,p{margin-top:0}code{color:#e6b393;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.88em}.sr-only,.visually-hidden{clip:rect(0, 0, 0, 0)!important;white-space:nowrap!important;border:0!important;width:1px!important;height:1px!important;margin:-1px!important;padding:0!important;position:absolute!important;overflow:hidden!important}.app-loading{min-height:100dvh;color:var(--muted);place-content:center;justify-items:center;gap:12px;display:grid}.spin{animation:.9s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.brand{letter-spacing:-.02em;white-space:nowrap;align-items:center;gap:11px;font-weight:700;display:inline-flex}.brand-mark{border-radius:var(--radius-md);background:var(--accent);color:#fff;place-items:center;width:40px;height:40px;font-size:18px;font-weight:800;display:grid}.brand-name{font-size:16px}.app-shell{min-height:100dvh;padding-left:76px}.side-rail{z-index:30;width:76px;padding:18px 10px max(18px, env(safe-area-inset-bottom));background:#151920;border-right:1px solid #242831;flex-direction:column;align-items:center;display:flex;position:fixed;inset:0 auto 0 0}.side-nav{flex-direction:column;gap:10px;width:100%;margin-top:28px;display:flex}.nav-button{color:#aeb2b9;border-radius:var(--radius-md);cursor:pointer;background:0 0;border:1px solid #0000;justify-content:center;align-items:center;gap:6px;min-height:44px;display:flex}.side-nav .nav-button span{display:none}.nav-button:hover{color:#fff;background:#20252d}.nav-button.active{color:#fff;background:var(--accent);border-color:#ee6a27}.sync-indicator{border-radius:var(--radius-md);background:#20252d;place-items:center;width:40px;height:40px;margin-top:auto;display:grid}.sync-indicator.online{color:var(--success)}.sync-indicator.offline{color:var(--danger)}.mobile-header,.bottom-nav{display:none}.page-shell{background:var(--canvas);min-height:100dvh;overflow:hidden}.page-content{width:min(100% - 64px, var(--content-width));margin:0 auto;padding:32px 0 48px}.page-header{justify-content:space-between;align-items:flex-start;gap:24px;min-height:72px;margin-bottom:28px;display:flex}.page-header h1{letter-spacing:-.04em;margin-bottom:2px;font-size:clamp(27px,2.2vw,34px);line-height:1.2}.page-header p{color:var(--muted);margin:0;font-size:clamp(14px,1.1vw,16px)}.page-header-action{align-self:center}.button{border-radius:var(--radius-sm);cursor:pointer;border:1px solid #0000;justify-content:center;align-items:center;gap:8px;min-height:44px;padding:9px 16px;font-size:14px;font-weight:700;transition:background-color .16s,border-color .16s,color .16s;display:inline-flex}.button:disabled{cursor:not-allowed;opacity:.52}.button.primary{color:#111214;background:#fff;border-color:#fff}.button.primary:hover:not(:disabled){background:#ddd;border-color:#ddd}.button.tertiary{background:var(--surface-elevated);border-color:var(--hairline);color:var(--ink)}.button.tertiary:hover:not(:disabled){background:var(--surface-card);border-color:var(--hairline-strong)}.button.full{width:100%}.danger-button{background:var(--surface-elevated);color:#ff9ba3;border-color:#5d2c32}.danger-button:hover:not(:disabled){background:var(--danger-soft);border-color:#7f3942}.icon-button{border-radius:var(--radius-sm);width:40px;height:40px;color:var(--muted);cursor:pointer;background:0 0;border:0;place-items:center;display:grid}.icon-button:hover{color:var(--ink);background:var(--surface-card)}.eyebrow{color:#e3733e;text-transform:uppercase;letter-spacing:.08em;align-items:center;gap:6px;font-size:12px;font-weight:800;line-height:1;display:inline-flex}.part-of-speech{color:#ef7c42;background:var(--accent-soft);border:1px solid var(--accent-border);white-space:nowrap;border-radius:999px;padding:4px 9px;font-size:12px;font-weight:700;line-height:1.2}.part-of-speech.text-only{background:0 0;border:0;padding:0}.vocabulary-word{font-kerning:normal;letter-spacing:.012em!important}.ipa{color:var(--muted);margin-bottom:0}.chinese-definition{color:var(--ink);font-weight:700}.english-definition{color:#d1cfcc}.forms{color:var(--muted);flex-wrap:wrap;gap:8px;display:flex}.forms span{color:var(--quiet);text-transform:uppercase;letter-spacing:.07em;font-size:12px;font-weight:800}.study-block{border-top:1px solid var(--hairline);margin-top:20px;padding-top:16px}.study-block h3{color:var(--quiet);letter-spacing:.06em;text-transform:uppercase;margin:0 0 10px;font-size:12px;font-weight:700;line-height:1.3}.examples{color:var(--muted)}.examples ol{gap:7px;margin:0;padding-left:22px;display:grid}.examples li{letter-spacing:.006em;padding-left:3px;font-size:clamp(15px,1.05vw,17px);line-height:1.55}.learning-aids{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.learning-group:first-child{grid-column:1/-1}.learning-group ul{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin:0;padding:0;list-style:none;display:grid}.learning-group li{background:var(--surface-elevated);border:1px solid var(--hairline);border-radius:11px;justify-content:space-between;align-items:baseline;gap:10px;min-width:0;padding:10px 12px;display:flex}.learning-group strong{min-width:0;color:var(--ink);overflow-wrap:anywhere;font-size:14px;font-weight:600}.learning-group span{color:var(--muted);text-align:right;flex:0 auto;font-size:12px}.study-block.compact{margin-top:14px;padding-top:12px}.learning-aids.compact{gap:10px}.learning-aids.compact .learning-group ul{grid-template-columns:1fr}.learning-aids.compact .learning-group li{padding:8px 10px}.dictionary-sources h3{color:#88cfa5;align-items:center;gap:6px;display:flex}.dictionary-sources>div{flex-wrap:wrap;gap:8px;display:flex}.dictionary-sources a{color:#a9dfbd;background:#152d20;border:1px solid #285139;border-radius:999px;align-items:center;gap:6px;min-height:34px;padding:6px 11px;font-size:12px;font-weight:700;text-decoration:none;display:inline-flex}.dictionary-sources a:hover{color:#caf0d8;background:#1b3828;border-color:#3e7654}.form-field>span{color:#d0cfcc;font-size:13px;font-weight:700}.form-error{color:#ff9ca5;margin:2px 0 4px;font-size:13px}.config-warning,.inline-warning{color:#f2c28d;border-radius:var(--radius-sm);background:#33271b;border:1px solid #624529;padding:13px 14px;font-size:14px}.lookup-hero{background:var(--surface);border:1px solid var(--hairline);border-radius:var(--radius-lg);padding:clamp(24px,4vw,42px)}.lookup-heading{max-width:720px}.lookup-heading h2{letter-spacing:-.05em;margin:12px 0 10px;font-size:clamp(30px,4vw,48px);line-height:1.05}.lookup-heading p{color:var(--muted);margin-bottom:28px}.lookup-form{grid-template-columns:minmax(0,1fr) auto;gap:12px;display:grid}.lookup-input-wrap{background:var(--surface-elevated);border:1px solid var(--hairline);border-radius:var(--radius-md);min-height:56px;color:var(--muted);align-items:center;gap:12px;padding:0 8px 0 16px;display:flex}.lookup-input-wrap:focus-within{border-color:var(--hairline-strong)}.lookup-input-wrap input{min-width:0;height:54px;color:var(--ink);background:0 0;border:0;outline:0;flex:1;font-size:clamp(17px,1.5vw,20px)}.lookup-button{min-width:132px;min-height:56px}.lookup-error{margin-top:14px}.inline-warning{margin:14px 0 0}.lookup-result-card{background:var(--surface);border:1px solid var(--hairline);border-radius:var(--radius-lg);grid-template-columns:minmax(0,1fr);gap:24px;margin-top:20px;padding:clamp(24px,4vw,40px);display:grid}.word-title-row,.detail-heading{justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.word-title-row h2,.detail-heading h2{letter-spacing:-.05em;margin-bottom:4px;font-size:clamp(34px,4vw,52px);line-height:1.05}.result-main{width:100%;min-width:0;max-width:none}.result-main .chinese-definition{margin:22px 0 8px;font-size:clamp(18px,1.7vw,22px)}.result-main .english-definition{font-size:17px}.result-actions{justify-content:flex-end;min-width:0;display:flex}.result-actions .button{min-width:180px}.recent-section{margin-top:34px}.section-heading{justify-content:space-between;align-items:baseline;gap:16px;margin-bottom:14px;display:flex}.section-heading h2{margin:0;font-size:18px}.section-heading span{color:var(--quiet);font-size:13px}.recent-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;display:grid}.mini-word-card{background:var(--surface);border:1px solid var(--hairline);border-radius:var(--radius-md);min-width:0;padding:16px}.mini-word-card>div{align-items:baseline;gap:8px;display:flex}.mini-word-card strong{font-size:17px}.mini-word-card span{color:#e3733e;font-size:12px}.mini-word-card p{color:var(--muted);white-space:nowrap;text-overflow:ellipsis;margin:6px 0 0;font-size:14px;overflow:hidden}.empty-inline{background:var(--surface);border:1px solid var(--hairline);border-radius:var(--radius-md);min-height:90px;color:var(--muted);justify-content:center;align-items:center;gap:10px;display:flex}.search-field{background:var(--surface);border:1px solid var(--hairline);border-radius:var(--radius-sm);width:min(100%,300px);min-height:44px;color:var(--muted);align-items:center;gap:9px;padding:0 10px 0 13px;display:flex}.search-field:focus-within{border-color:var(--hairline-strong)}.search-field input{min-width:0;height:42px;color:var(--ink);background:0 0;border:0;outline:0;flex:1;font-size:14px}.search-field button{color:var(--muted);border-radius:var(--radius-xs);cursor:pointer;background:0 0;border:0;place-items:center;width:28px;height:28px;display:grid}.metric-grid{grid-template-columns:1.45fr 1fr;gap:14px;margin-bottom:14px;display:grid}.metric-card{background:var(--surface);border:1px solid var(--hairline);border-radius:var(--radius-lg);flex-direction:column;justify-content:center;align-items:flex-start;min-height:106px;padding:20px;display:flex}.metric-card.emphasized{background:#2d201a;border-color:#51301f}.metric-card span{color:var(--muted);font-size:13px;font-weight:700}.metric-card strong{letter-spacing:-.04em;font-size:32px;line-height:1.1}.notebook-page{padding-top:18px;padding-bottom:18px}.notebook-page>.page-header{min-height:50px;margin-bottom:10px}.notebook-page .metric-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-bottom:8px}.notebook-page .metric-card{min-height:64px;padding:10px 16px}.notebook-page .metric-card strong{font-size:24px}.notebook-grid{grid-template-columns:minmax(286px,.62fr) minmax(0,1.7fr);gap:12px;height:max(500px,100dvh - 170px);display:grid}.entry-list,.notebook-detail-panel{background:var(--surface);border:1px solid var(--hairline);border-radius:var(--radius-lg);overflow:hidden}.entry-list{max-height:100%;overflow-y:auto}.entry-row{border:0;border-bottom:1px solid var(--hairline);text-align:left;cursor:pointer;background:0 0;justify-content:space-between;align-items:center;gap:12px;width:100%;min-height:66px;padding:10px 13px;display:flex}.entry-row:last-child{border-bottom:0}.entry-row:hover{background:var(--surface-hover)}.entry-row.selected{background:var(--accent-soft)}.entry-row-copy{min-width:0}.entry-word-line{align-items:baseline;gap:8px;display:flex}.entry-word-line strong{font-size:16px}.entry-row-copy p{color:var(--muted);white-space:nowrap;text-overflow:ellipsis;margin:3px 0 0;font-size:13px;overflow:hidden}.entry-row-meta{color:var(--quiet);flex:none;align-items:center;gap:8px;display:flex}.status-badge{background:var(--surface-card);color:var(--muted);text-transform:capitalize;border-radius:999px;padding:3px 8px;font-size:11px;font-weight:700}.status-badge.learning{color:#f1b27d;background:#3e2b1c}.status-badge.familiar{color:#8ddbad;background:#183625}.status-badge.mastered{color:#9ad7eb;background:#15333b}.notebook-detail-panel{max-height:100%;overflow-y:auto}.entry-detail{padding:clamp(18px,1.8vw,23px)}.detail-heading h2{font-size:clamp(30px,3vw,42px)}.entry-detail>.chinese-definition{margin:15px 0 5px;font-size:clamp(17px,1.5vw,20px)}.entry-detail>.english-definition{margin-bottom:10px}.entry-detail>.forms{margin-bottom:0}.detail-examples{margin-top:16px}.entry-detail>.study-block{margin-top:14px;padding-top:11px}.entry-detail>.learning-aids{gap:9px}.entry-detail .learning-group ul{gap:6px}.entry-detail .learning-group li{padding:7px 9px}.detail-review-footer{border-top:1px solid var(--hairline);grid-template-columns:minmax(180px,1fr) minmax(210px,auto) auto;align-items:center;gap:14px 22px;margin-top:14px;padding-top:13px;display:grid}.review-metadata{color:var(--muted);align-items:center;gap:10px;display:flex}.review-metadata div{flex-direction:column;display:flex}.review-metadata span{text-transform:uppercase;letter-spacing:.06em;font-size:11px}.review-metadata strong{color:#d7d5d2;font-size:13px}.detail-stats{grid-template-columns:repeat(3,minmax(54px,1fr));gap:12px;margin:0;display:grid}.detail-stats div{flex-direction:column;gap:2px;display:flex}.detail-stats dt{color:var(--quiet);text-transform:uppercase;letter-spacing:.05em;font-size:11px}.detail-stats dd{margin:0;font-size:18px;font-weight:700}.mobile-detail-bar{display:none}.empty-state,.review-empty{border:1px solid var(--hairline);border-radius:var(--radius-lg);background:var(--surface);text-align:center;min-height:360px;color:var(--muted);place-content:center;justify-items:center;padding:32px;display:grid}.empty-state h2,.review-empty h2{color:var(--ink);margin:12px 0 4px}.empty-state p,.review-empty p{margin:0}.review-page{--review-max:1180px;overflow-anchor:none}.review-page>.page-header,.review-workspace,.review-empty,.restart-link{width:min(100%, var(--review-max));margin-left:auto;margin-right:auto}.review-workspace{gap:clamp(16px,2vh,24px);display:grid}.session-header{color:var(--muted);grid-template-columns:1fr auto;align-items:end;gap:7px 18px;font-size:clamp(13px,1.2vw,15px);font-weight:650;display:grid}.session-numbers{align-items:baseline;gap:10px;display:flex}.session-numbers strong{color:var(--ink);font-size:clamp(18px,1.7vw,23px)}.progress-track{background:var(--surface-card);border-radius:999px;grid-column:1/-1;height:7px;overflow:hidden}.progress-track span{border-radius:inherit;background:var(--accent);min-width:7px;height:100%;transition:width .25s;display:block}.practice-card{background:var(--surface);border:1px solid var(--hairline);border-radius:var(--radius-lg);flex-direction:column;justify-content:center;align-items:center;gap:clamp(18px,2.4vh,28px);min-height:min(660px,100dvh - 190px);padding:clamp(24px,3vw,40px);display:flex}.practice-card.has-outcome{justify-content:flex-start;gap:12px;padding:clamp(18px,2.4vw,28px)}.practice-card.has-outcome .question-heading{display:none}.question-heading{text-align:center;width:min(100%,880px)}.question-type{color:#f0834e;background:var(--accent-soft);letter-spacing:.08em;text-transform:uppercase;border-radius:999px;padding:5px 10px;font-size:clamp(10px,.9vw,12px);font-weight:800;line-height:1;display:inline-block}.question-heading h2{letter-spacing:-.055em;margin:14px 0 0;font-size:clamp(34px,4.2vw,58px);line-height:1.03}.question-heading h2.meaning-cue{letter-spacing:.01em;max-width:780px;margin-left:auto;margin-right:auto;font-size:clamp(25px,3vw,40px);line-height:1.25}.question-meta{color:var(--muted);letter-spacing:.015em;margin:9px 0 0;font-size:clamp(14px,1.2vw,16px);line-height:1.45}.masked-example{color:#cbc8c4;margin:20px auto 0;font-size:clamp(18px,2vw,27px);font-weight:650;line-height:1.45}.answer-options{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;width:min(100%,900px);display:grid}.answer-option{border:1px solid var(--hairline);border-radius:var(--radius-md);background:var(--surface-elevated);text-align:left;cursor:pointer;align-items:center;gap:14px;min-height:clamp(68px,8vh,86px);padding:14px 17px;display:flex}.answer-option:hover{border-color:var(--hairline-strong);background:var(--surface-card)}.answer-option>span{color:#f0834e;background:var(--accent-soft);border-radius:999px;flex:none;place-items:center;width:clamp(32px,3vw,38px);height:clamp(32px,3vw,38px);font-size:13px;font-weight:800;display:grid}.answer-option strong{font-size:clamp(16px,1.5vw,20px);line-height:1.3}.reveal-button{min-width:min(100%,300px)}.spelling-form{grid-template-columns:minmax(0,1fr) auto;gap:10px;width:min(100%,720px);display:grid}.spelling-form label{color:var(--muted);grid-column:1/-1;font-weight:650}.spelling-form input,.form-field input{border:1px solid var(--hairline);border-radius:var(--radius-sm);background:var(--surface-elevated);min-width:0;min-height:48px;color:var(--ink);outline:0;padding:0 13px;font-size:17px}.spelling-form input:focus,.form-field input:focus{border-color:var(--hairline-strong)}.answer-reveal{border:1px solid var(--hairline);border-radius:var(--radius-lg);background:var(--surface-elevated);width:min(100%,1080px);padding:clamp(16px,2vw,22px)}.answer-reveal.correct{border-color:#266a40}.answer-reveal.incorrect{border-color:#7b343c}.answer-reveal.revealed{border-color:var(--accent-border)}.outcome-banner{border-radius:var(--radius-sm);align-items:flex-start;gap:11px;margin-bottom:12px;padding:10px 12px;display:flex}.correct .outcome-banner{color:#77e49d;background:var(--success-soft)}.incorrect .outcome-banner{color:#ff9ca5;background:var(--danger-soft)}.revealed .outcome-banner{color:#f09869;background:var(--accent-soft)}.outcome-icon{background:currentColor;border-radius:999px;place-items:center;width:28px;height:28px;display:grid}.outcome-icon svg{color:var(--surface)}.outcome-banner strong{font-size:clamp(16px,1.5vw,19px)}.outcome-banner p{color:#e6d8d9;margin:2px 0 0}.correct-answer-block>span{color:var(--muted);letter-spacing:.06em;text-transform:uppercase;font-size:12px;font-weight:800}.review-answer-layout{border-top:1px solid var(--hairline);grid-template-columns:minmax(0,.9fr) minmax(0,1.35fr);gap:20px;padding-top:14px;display:grid}.review-answer-layout>:only-child{grid-column:1/-1}.review-answer-layout>.learning-aids{border-top:0;margin-top:0;padding-top:0}.review-answer-layout .learning-aids{grid-template-columns:minmax(0,2fr) minmax(0,1fr)}.review-answer-layout .learning-aids.compact .learning-group ul{grid-template-columns:repeat(2,minmax(0,1fr))}.review-answer-layout .learning-group-collocations{grid-column:1/-1}.review-answer-layout .learning-group-antonyms ul{grid-template-columns:1fr!important}.review-answer-layout .learning-group li{padding:7px 9px}.correct-answer-block>h3{letter-spacing:-.045em;margin:4px 0 9px;font-size:clamp(28px,3vw,40px);line-height:1.05}.correct-answer-block p{margin-bottom:6px}.expected-form{color:var(--muted);align-items:baseline;gap:8px;display:flex}.expected-form span{letter-spacing:.05em;text-transform:uppercase;font-size:12px;font-weight:800}.expected-form strong{color:var(--ink);letter-spacing:.02em;font-size:18px}.review-example{color:var(--muted);font-size:clamp(14px,1.2vw,16px)}.review-action-footer{min-width:0}.rating-instruction{color:var(--muted);border-top:1px solid var(--hairline);margin:12px 0 9px;padding-top:11px;font-weight:650}.grade-grid{grid-template-columns:repeat(3,1fr);gap:10px;display:grid}.grade-button{border-radius:var(--radius-md);color:#fff;text-align:left;cursor:pointer;border:1px solid #0000;align-items:center;gap:10px;min-height:clamp(62px,7vh,76px);padding:10px 13px;display:flex}.grade-button:disabled{opacity:.55}.grade-button.forgotten{background:#cf3d4b}.grade-button.vague{background:#b94a0a}.grade-button.known{background:#219a4b}.grade-button.easy{background:#167a58}.grade-button.retry{background:var(--accent);justify-content:center;width:100%}.grade-button:hover:not(:disabled){border-color:#ffffff73}.grade-button span{flex-direction:column;display:flex}.grade-button strong{font-size:clamp(15px,1.3vw,18px)}.grade-button small{opacity:.83;font-weight:600}.grading-status{color:var(--muted);justify-content:center;align-items:center;gap:7px;margin-top:10px;font-size:13px;display:flex}.restart-link{color:var(--muted);cursor:pointer;background:0 0;border:0;align-items:center;gap:6px;margin-top:14px;display:flex}.restart-link:hover{color:var(--ink)}.settings-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.settings-card{background:var(--surface);border:1px solid var(--hairline);border-radius:var(--radius-lg);flex-direction:column;align-items:flex-start;gap:18px;padding:clamp(20px,3vw,28px);display:flex}.settings-card-heading{align-items:flex-start;gap:12px;display:flex}.settings-card-heading>svg{color:#e3733e;margin-top:2px}.settings-card h2{margin-bottom:2px;font-size:19px}.settings-card p{color:var(--muted);margin:0}.form-field{gap:6px;width:100%;display:grid}.form-field input{width:100%}.secret-status{border-radius:var(--radius-sm);align-items:center;gap:9px;padding:11px 12px;font-size:13px;display:flex}.secret-status.configured{color:#98ddb0;background:var(--success-soft);border:1px solid #26573a}.secret-status.missing{color:#f0bd87;background:#33271b;border:1px solid #624529}.settings-explanation{font-size:14px}.settings-actions{flex-wrap:wrap;gap:9px;display:flex}.install-card ol{color:var(--muted);margin:0;padding-left:22px}.install-card li+li{margin-top:8px}.public-card>p{font-size:14px}.settings-error{margin-top:14px}.build-version{color:var(--quiet);text-align:center;margin:18px 0 0;font-size:12px}.syncing{z-index:70;color:var(--muted);background:var(--surface-elevated);border:1px solid var(--hairline);border-radius:999px;align-items:center;gap:7px;padding:6px 10px;font-size:12px;display:flex;position:fixed;top:14px;right:18px}.toast{z-index:100;border-radius:var(--radius-md);background:var(--surface-card);border:1px solid var(--hairline-strong);align-items:center;gap:12px;max-width:min(420px,100vw - 32px);min-height:46px;padding:10px 10px 10px 14px;font-size:14px;display:flex;position:fixed;bottom:22px;right:22px}.toast.success{border-color:#326246}.toast.error{border-color:#783841}.toast button{width:30px;height:30px;color:var(--muted);border-radius:var(--radius-xs);cursor:pointer;background:0 0;border:0;place-items:center;display:grid}@media (width>=1600px){.page-content{width:min(100% - 112px, var(--content-width));padding-top:44px}.practice-card{min-height:min(720px,100dvh - 220px)}}@media (width>=761px){.review-page{grid-template-rows:auto minmax(0,1fr) auto;height:100dvh;min-height:680px;padding-top:22px;padding-bottom:22px;display:grid}.review-page>.page-header{min-height:54px;margin-bottom:14px}.review-workspace{grid-template-rows:auto minmax(0,1fr);gap:12px;min-height:0}.practice-card{height:100%;min-height:0;overflow:hidden}.practice-card.has-outcome .answer-reveal{flex-direction:column;flex:auto;min-height:0;display:flex;overflow:hidden}.practice-card.has-outcome .outcome-banner{flex:none}.practice-card.has-outcome .review-answer-layout{overscroll-behavior:contain;scrollbar-gutter:stable;flex:auto;min-height:0;padding-right:8px;overflow:hidden auto}.practice-card.has-outcome .review-answer-layout::-webkit-scrollbar{width:8px}.practice-card.has-outcome .review-answer-layout::-webkit-scrollbar-track{background:0 0}.practice-card.has-outcome .review-answer-layout::-webkit-scrollbar-thumb{background:var(--hairline-strong);border:2px solid var(--surface-elevated);border-radius:999px}.practice-card.has-outcome .review-action-footer{flex:none}}@media (width<=980px){.page-content{width:min(100% - 40px, var(--content-width))}.recent-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.notebook-grid{grid-template-columns:minmax(270px,.58fr) minmax(0,1.35fr)}.entry-row-meta .status-badge{display:none}.detail-review-footer{grid-template-columns:1fr auto}.detail-review-footer .review-metadata{grid-column:1/-1}}@media (width>=761px) and (height<=800px){.notebook-page{padding-top:10px;padding-bottom:10px}.notebook-page>.page-header{min-height:42px;margin-bottom:6px}.notebook-page>.page-header p{display:none}.notebook-page .metric-grid{gap:6px;margin-bottom:6px}.notebook-page .metric-card{flex-direction:row;justify-content:space-between;align-items:center;min-height:48px;padding:7px 13px}.notebook-page .metric-card strong{font-size:22px}.notebook-grid{height:max(500px,100dvh - 124px)}.entry-detail>.study-block{margin-top:10px;padding-top:8px}.review-page{min-height:620px;padding-top:14px;padding-bottom:14px}.review-page>.page-header{min-height:44px;margin-bottom:9px}.review-page .page-header h1{font-size:26px}.review-page .page-header p{font-size:13px}.review-workspace{gap:8px}.session-header{gap-block:4px}.progress-track{height:5px}.practice-card{gap:14px;padding:18px 24px}.question-heading h2{margin-top:10px;font-size:clamp(30px,3.5vw,48px)}.answer-option{min-height:60px;padding-top:10px;padding-bottom:10px}.practice-card.has-outcome{gap:8px;padding:14px 18px}.answer-reveal{padding:12px 16px}.outcome-banner{margin-bottom:8px;padding:8px 10px}.review-answer-layout{gap:16px;padding-top:10px}.study-block.compact{margin-top:10px;padding-top:9px}.rating-instruction{margin:8px 0 7px;padding-top:8px}.grade-button{min-height:54px;padding-top:7px;padding-bottom:7px}}@media (width<=760px){html,body,#root{width:100%;height:100%;overflow:hidden}.app-shell{--mobile-safe-top:min(64px, env(safe-area-inset-top,0px));--mobile-safe-bottom:min(40px, env(safe-area-inset-bottom,0px));width:100%;height:100%;min-height:0;padding:0;display:block;position:static;overflow:visible}.side-rail{display:none}.mobile-header{z-index:60;height:calc(58px + var(--mobile-safe-top));padding:calc(8px + var(--mobile-safe-top)) max(16px, env(safe-area-inset-right)) 8px max(16px, env(safe-area-inset-left));-webkit-backdrop-filter:saturate(190%)blur(24px);backdrop-filter:saturate(190%)blur(24px);background:linear-gradient(#313339c7,#16181ca3);border-bottom:1px solid #ffffff2e;justify-content:space-between;align-items:center;display:flex;position:fixed;inset:0 0 auto;box-shadow:inset 0 -1px #00000038}.mobile-header .brand-mark{width:34px;height:34px;font-size:15px}.connection-dot{border-radius:999px;width:8px;height:8px}.connection-dot.online{background:var(--success)}.connection-dot.offline{background:var(--danger)}.bottom-nav{z-index:50;inset:auto max(8px, env(safe-area-inset-right)) calc(8px + var(--mobile-safe-bottom)) max(8px, env(safe-area-inset-left));-webkit-backdrop-filter:saturate(190%)blur(24px);backdrop-filter:saturate(190%)blur(24px);background:linear-gradient(155deg,#3f444ea8,#1b1e2594 48%,#12151bb8);border:1px solid #ffffff38;border-radius:18px;grid-template-columns:repeat(4,minmax(0,1fr));width:auto;height:68px;margin:0;padding:5px;display:grid;position:fixed;overflow:hidden;box-shadow:inset 0 1px #ffffff1f,inset 0 -1px #00000047}.bottom-nav:before{content:"";z-index:0;pointer-events:none;background:linear-gradient(110deg,#ffffff1a,#0000 30% 72%,#ffffff0a);border-radius:17px;position:absolute;inset:1px}.bottom-nav .nav-button{z-index:1;border-radius:13px;flex-direction:column;gap:2px;min-height:56px;font-size:10px;position:relative}.bottom-nav .nav-button.active{color:#ff8a4f;background:linear-gradient(#dc520c4d,#7d300f38);border-color:#ff8a4f57;box-shadow:inset 0 1px #ffb89224}.page-shell{z-index:0;inset:calc(58px + var(--mobile-safe-top)) 0 calc(84px + var(--mobile-safe-bottom));overscroll-behavior-y:contain;-webkit-overflow-scrolling:touch;width:auto;height:auto;min-height:0;position:fixed;overflow:hidden auto}.page-content{width:100%;padding:22px 16px 32px}.page-header{min-height:auto;margin-bottom:20px;display:block}.page-header h1{font-size:28px}.page-header-action{margin-top:14px}.compact-search{width:100%}.lookup-hero{padding:22px 18px}.lookup-heading h2{font-size:34px}.lookup-form{grid-template-columns:1fr}.lookup-button{width:100%}.lookup-result-card{grid-template-columns:1fr;padding:22px 18px}.learning-aids{grid-template-columns:1fr;gap:12px}.learning-group:first-child{grid-column:auto}.learning-group ul{grid-template-columns:1fr}.result-actions .button{width:100%}.word-title-row h2{font-size:38px}.recent-grid{grid-template-columns:1fr}.metric-grid{grid-template-columns:1fr 1fr;gap:10px}.metric-card{min-height:88px;padding:16px}.metric-card strong{font-size:28px}.notebook-grid{height:auto;min-height:0;display:block}.entry-list{border-radius:var(--radius-md);max-height:none}.entry-row{min-height:72px;padding:12px 13px}.entry-row.selected{background:0 0}.entry-row:hover{background:var(--surface-hover)}.entry-row-meta .status-badge{display:inline-block}.notebook-detail-panel{display:none}.notebook-detail-panel.mobile-open{z-index:80;background:var(--canvas);max-height:none;padding:0 0 calc(24px + env(safe-area-inset-bottom));border:0;border-radius:0;display:block;position:fixed;inset:0;overflow-y:auto}.mobile-detail-bar{z-index:2;min-height:calc(64px + env(safe-area-inset-top));padding:calc(10px + env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) 10px max(16px, env(safe-area-inset-left));background:var(--canvas);border-bottom:1px solid var(--hairline);display:flex;position:sticky;top:0}.notebook-detail-open .mobile-header,.notebook-detail-open .bottom-nav{visibility:hidden;pointer-events:none}.notebook-detail-open .page-shell{z-index:70}.entry-detail{padding:22px 18px}.detail-heading h2{font-size:38px}.detail-review-footer{grid-template-columns:1fr;align-items:stretch}.detail-review-footer .review-metadata{grid-column:auto}.detail-review-footer .danger-button{width:100%}.review-page{padding-left:12px;padding-right:12px}.review-page>.page-header{padding-left:4px;padding-right:4px}.practice-card{justify-content:flex-start;gap:20px;min-height:0;padding:22px 14px}.question-heading h2{font-size:34px}.masked-example{font-size:19px}.answer-options{grid-template-columns:1fr}.answer-option{min-height:64px;padding:12px}.spelling-form{grid-template-columns:1fr}.spelling-form label{grid-column:auto}.answer-reveal{padding:16px 13px}.practice-card.has-outcome .question-heading{display:none}.review-page:has(.practice-card.has-outcome)>.page-header{display:none}.review-page:has(.practice-card.has-outcome) .review-workspace{gap:8px}.review-page:has(.practice-card.has-outcome) .session-header{gap-block:4px}.review-page:has(.practice-card.has-outcome) .progress-track{height:5px}.review-answer-layout{grid-template-columns:1fr;gap:12px}.review-answer-layout .learning-aids,.review-answer-layout .learning-aids.compact .learning-group ul{grid-template-columns:1fr}.correct-answer-block>h3{font-size:34px}.grade-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}.grade-button{text-align:center;justify-content:center;min-height:60px;padding:8px 6px}.grade-button span{align-items:center}.grade-button small{display:none}.grade-button.retry{min-height:62px}.grade-button.retry small{display:block}.settings-grid{grid-template-columns:1fr}.toast{left:16px;right:16px;bottom:calc(96px + var(--mobile-safe-bottom))}.syncing{top:calc(66px + var(--mobile-safe-top))}@supports not ((-webkit-backdrop-filter:blur(1px)) or (backdrop-filter:blur(1px))){.mobile-header{background:#1f2126f5}.bottom-nav{background:#1f232bf5}}}@media (width<=390px){.page-content{padding-left:12px;padding-right:12px}.mobile-header{padding-left:max(12px, env(safe-area-inset-left));padding-right:max(12px, env(safe-area-inset-right))}.metric-card span{font-size:12px}.entry-row-meta .status-badge{display:none}.settings-actions,.settings-actions .button{width:100%}.word-title-row,.detail-heading{flex-direction:column;gap:8px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}