:root{--paper:var(--bg);--ink:var(--text);--muted:var(--subtext);--line:var(--border);--green:var(--accent);--lime:var(--accent);--radius:var(--card-radius);--red:var(--wrong);--code-bg:color-mix(in srgb,var(--accent) 12%,var(--surface));--code-border:color-mix(in srgb,var(--accent) 35%,var(--surface));--code-ink:var(--text);background:var(--bg);color:var(--text)}
body{background:var(--bg);color:var(--text)}html[data-background=dots] body{background-image:radial-gradient(var(--border) 1px,transparent 1px);background-size:20px 20px}html[data-background=glow] body{background-image:radial-gradient(ellipse at 20% 0%,color-mix(in srgb,var(--accent) 13%,transparent),transparent 60%);background-attachment:fixed}
.topbar,.focus-main{max-width:1712px}.topbar{padding:20px 36px}.focus-main{padding:24px 36px 0}.brandmark{border-color:var(--border);border-radius:var(--card-radius);background:var(--surface)}.brandmark span{color:var(--accent)}.brand small,.eyebrow,.local-note,.focus-topline>span{color:var(--subtext)}.top-actions{gap:10px}.account-pill,.quiet:hover,.secondary:hover,.secondary.active{background:var(--raised);border-color:var(--border);color:var(--text)}
.study-card,.setup-card,.controls,.bank-guide,.notebook-card,.legacy-card,.login-intro,.empty-state,.overview,.resume-card,.round-summary{background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:var(--card-radius);box-shadow:none}.overview-title #overview-id,.overview-bottom b,.overview-title span,.overview-bottom,.stats small,.resume-card p,.round-summary p{color:var(--subtext)}.overview:after{display:none}.primary,.notebook-card .primary,.resume-card .primary,.round-summary button,.round-summary .link-button{background:var(--accent);color:var(--accent-ink);border-radius:var(--card-radius)}.secondary{border-color:var(--border);border-radius:var(--card-radius);color:var(--text)}input,select{background:var(--bg);border-color:var(--border);color:var(--text)}label,.settings-note,.setup-side p,.login-intro p:not(.eyebrow),.empty-state p{color:var(--subtext)}.mode-switch{background:var(--bg)}.mode-switch .active{background:var(--raised);color:var(--accent);box-shadow:none}.mode-switch small,.quantity-setting{color:var(--subtext)}.quota.active{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}.segment-setting{background:var(--raised);border-color:var(--border)}.notebook-distribution{border-color:var(--border)}.notebook-distribution b{color:var(--text)}.setup-bottom .pool-hint,.pool-hint,.bank-guide b{color:var(--subtext)}
#study-content{display:grid;grid-template-columns:208px minmax(0,1fr);gap:22px;align-items:start}.practice-panels{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:22px;align-items:start;min-width:0}.focus-main .study-card{padding:var(--study-padding,28px);border-radius:var(--card-radius)}.focus-topline{margin-bottom:20px}.focus-main .card-header h2{font-size:21px;letter-spacing:-.03em}.question-heading{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.type-badge{display:inline-flex;padding:7px 11px;background:var(--accent);color:var(--accent-ink);border:1px solid var(--accent);border-radius:6px;font-size:13px;font-weight:750;white-space:nowrap}.type-badge[data-type="1"],.type-badge[data-type="5"]{box-shadow:inset 0 -2px 0 #0002}.type-hint{font-size:11px;color:var(--subtext);margin:10px 0 0}.question{font-size:var(--question-size);line-height:1.9;font-weight:550;margin-top:22px}.focus-main .question-meta{margin-top:20px}.question-meta span,.focus-main .question-meta span:last-child{background:var(--raised);color:var(--subtext);border:1px solid var(--border)}.attempt-stats,.source-refs,.session-position{color:var(--subtext)}.focus-main .attempt-stats{margin-bottom:18px;font-size:11px}.option{background:var(--surface);border:1px solid var(--border);border-radius:var(--card-radius);font-size:calc(var(--question-size) - 2px);padding:14px;gap:12px;color:var(--text)}.option .letter{border-color:var(--border);color:var(--subtext);border-radius:5px}.option.selected{background:color-mix(in srgb,var(--accent) 12%,var(--surface));border-color:var(--accent)}.option.selected .letter{color:var(--accent)}.option.correct{background:color-mix(in srgb,var(--correct) 10%,var(--surface));border-color:var(--correct)}.option.correct .letter{background:var(--correct);color:var(--bg);border-color:var(--correct)}.option.incorrect{background:color-mix(in srgb,var(--wrong) 10%,var(--surface));border-color:var(--wrong)}.option:not(:disabled):hover{border-color:var(--accent)}.answer-panel strong,.analysis-answer,.analysis-link{color:var(--accent)}.result.good{color:var(--correct)}.result.bad{color:var(--wrong)}
.analysis-column{border-radius:var(--card-radius);scrollbar-width:thin}.analysis-column .insight{background:var(--raised);border-color:var(--border);border-radius:var(--card-radius)}.analysis-column .insight-heading{padding:24px 22px 0}.analysis-column .mnemonic{padding:24px 22px}.analysis-column .analysis-block{padding:24px 22px;background:var(--surface);border-color:var(--border)}.analysis-column .mnemonic h3,.analysis-column .analysis-block #analysis,.analysis-block details{color:var(--subtext)}.mnemonic p,.analysis-block #original-explanation{color:var(--text)}.spark{color:var(--accent)}.ai-tag{border-color:var(--border);color:var(--subtext)}.analysis-locked{background:var(--surface);border-color:var(--border);border-radius:var(--card-radius)}.analysis-locked>p:not(.eyebrow),.analysis-lock-note{color:var(--subtext)}.analysis-lock-mark{color:var(--accent);border-color:var(--border)}.option-map{font-size:11px;color:var(--subtext);line-height:1.8;padding:10px 12px;border:1px dashed var(--border);border-radius:6px;margin:0 0 18px}.answer-issue,.wrong-progress{background:var(--raised);border-color:var(--border);color:var(--subtext)}.wrong-progress span{color:var(--subtext)}.three-steps i{background:var(--border)}.three-steps .filled{background:var(--correct)}
.session-rail{position:sticky;top:24px;max-height:calc(100dvh - 48px);overflow:auto;scrollbar-width:thin;background:var(--surface);border:1px solid var(--border);border-radius:var(--card-radius);min-width:0}.session-rail summary{padding:18px 17px;border-bottom:1px solid var(--border);font-size:13px;font-weight:650;list-style:none;display:flex;justify-content:space-between;gap:12px}.session-rail summary::-webkit-details-marker{display:none}.session-rail summary span{display:none;font-size:10px;color:var(--subtext);font-weight:400}.rail-body{padding:18px 17px}.rail-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px}.rail-stats>div>span{font-size:11px;color:var(--subtext)}.rail-stats p{margin:8px 0 0;white-space:nowrap}.rail-stats strong{font-size:26px;line-height:1.2;letter-spacing:-.04em;font-weight:600}.rail-stats p span{font-size:11px;color:var(--subtext)}.rail-stats b{font-weight:400}.rail-note{font-size:10px;line-height:1.8;color:var(--subtext);margin:12px 0}.session-rail .session-position{font-size:10px;display:grid;gap:7px;margin-top:20px}.session-rail .progress-track{margin:12px 0 20px;background:var(--raised);height:4px}.progress-track>div{background:var(--accent)}.grid-legend{display:flex;flex-wrap:wrap;gap:8px 12px;font-size:10px;color:var(--subtext);margin:0 0 18px}.grid-legend span{display:flex;align-items:center;gap:5px}.grid-legend i{width:7px;height:7px;border-radius:2px;background:var(--border)}.grid-legend .correct{background:var(--correct)}.grid-legend .incorrect{background:var(--wrong)}.grid-legend .viewed{background:var(--accent)}.answer-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:6px}.answer-cell{padding:0;min-height:29px;border-radius:5px;background:var(--raised);border:1px solid var(--border);color:var(--subtext);font-size:11px;font-variant-numeric:tabular-nums}.answer-cell.correct{background:color-mix(in srgb,var(--correct) 18%,var(--surface));border-color:color-mix(in srgb,var(--correct) 50%,var(--surface));color:var(--correct)}.answer-cell.incorrect{background:color-mix(in srgb,var(--wrong) 15%,var(--surface));border-color:color-mix(in srgb,var(--wrong) 50%,var(--surface));color:var(--wrong)}.answer-cell.viewed{background:color-mix(in srgb,var(--accent) 15%,var(--surface));color:var(--accent)}.answer-cell.current{outline:2px solid var(--accent);outline-offset:1px;color:var(--text);font-weight:750}
.activity-mount{padding:26px;background:var(--surface);border:1px solid var(--border);border-radius:var(--card-radius);margin:0 0 24px;min-width:0}.practice-panels>.activity-mount{grid-column:1/-1;margin:0}.activity-heading{display:flex;justify-content:space-between;align-items:center;gap:18px}.activity-heading h2{font-size:18px;margin:0}.activity-heading .eyebrow{font-size:9px;margin-bottom:8px}.activity-controls{display:flex;align-items:center;gap:6px}.activity-controls select{margin:0;font-size:11px;min-height:36px;max-width:160px}.range-button{font-size:11px;min-height:36px;white-space:nowrap;padding:7px 10px;border:1px solid transparent;border-radius:6px;color:var(--subtext)}.range-button.active{border-color:var(--border);background:var(--raised);color:var(--text)}.activity-stats{display:flex;gap:32px;margin:24px 0;color:var(--subtext);font-size:11px}.activity-stats strong{font-size:24px;color:var(--text);font-weight:550;margin-right:9px}.heat-scroll{overflow-x:auto;scrollbar-width:thin;padding-bottom:8px}.heat-calendar{min-width:660px}.heat-months{display:grid;gap:4px;margin-bottom:8px;font-size:9px;color:var(--subtext)}.heat-months span{white-space:nowrap}.heat-grid{display:grid;grid-template-rows:repeat(7,11px);grid-auto-flow:column;gap:4px}.heat-cell{display:block;min-height:0;padding:0;width:100%;height:11px;border:0;border-radius:2px;background:var(--raised)}.heat-cell[data-level="1"]{background:color-mix(in srgb,var(--accent) 25%,var(--surface))}.heat-cell[data-level="2"]{background:color-mix(in srgb,var(--accent) 50%,var(--surface))}.heat-cell[data-level="3"]{background:color-mix(in srgb,var(--accent) 75%,var(--surface))}.heat-cell[data-level="4"]{background:var(--accent)}.heat-cell.outside{opacity:.3}.heat-cell:hover{outline:1px solid var(--accent);outline-offset:1px}.heat-bottom{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-top:12px}.heat-detail,.activity-note{font-size:10px;color:var(--subtext);line-height:1.8;margin:0}.activity-note{margin-top:8px}.heat-legend{display:flex;align-items:center;gap:4px;font-size:10px;color:var(--subtext);white-space:nowrap}.heat-legend i{width:11px;flex-shrink:0}
dialog{background:var(--surface);border-color:var(--border);color:var(--text);border-radius:var(--card-radius)}dialog::backdrop{background:#000b;backdrop-filter:blur(5px)}.account-dialog>p:not(.eyebrow),dialog p{color:var(--subtext)}.style-trigger{white-space:nowrap;color:var(--subtext)}.style-dialog{width:min(880px,95vw);padding:30px}.style-heading{display:flex;justify-content:space-between;gap:20px;align-items:center}.style-heading h2{font-size:22px;line-height:1.6;margin:0}.style-heading .eyebrow{margin-bottom:8px}.style-heading button{font-size:26px}.style-toolbar{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:20px 0}.style-toolbar label{margin:0}.style-toolbar select{font-size:13px}.wallpaper-palette{padding:18px;border:1px solid var(--border);border-radius:var(--card-radius);display:flex;align-items:center;gap:14px;background:var(--bg)}.wallpaper-palette>div{flex:1}.wallpaper-palette h3,.custom-palette h3,.theme-filter h3{font-size:14px;margin:0}.wallpaper-palette p{font-size:11px;margin:8px 0 0;line-height:1.7}.upload-button{margin:0;white-space:nowrap;cursor:pointer;font-size:12px}.wallpaper-palette select{width:auto;margin:0}.theme-filter{display:flex;align-items:center;justify-content:space-between;margin:24px 0 14px}.theme-filter select{width:120px;margin:0}.theme-gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.theme-card{text-align:left;border:1px solid var(--border);border-radius:var(--card-radius);padding:12px;background:var(--bg);min-width:0;overflow:hidden}.theme-card.selected{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent)}.theme-card strong{display:block;font-size:12px;margin:14px 0 6px}.theme-card>span{font-size:10px;color:var(--subtext)}.theme-swatch{height:68px;border:1px solid #ffffff18;border-radius:6px;padding:10px;display:flex;align-items:end;justify-content:space-between}.theme-swatch i:first-child{width:65%;height:45px;border:1px solid;border-radius:5px}.theme-swatch i:last-child{width:18px;height:18px;border-radius:50%}.custom-palette{border-top:1px solid var(--border);margin-top:24px;padding-top:24px}.color-fields{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.color-fields input{padding:3px;height:38px;cursor:pointer}.custom-palette p{font-size:11px;line-height:1.8}.toast{background:var(--text);color:var(--bg)}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline-color:var(--accent)}
html[data-density=compact] .focus-main .study-card,html[data-density=compact] .analysis-column .analysis-block{padding:20px}html[data-density=compact] .option{padding:10px 12px}html[data-density=compact] .question{line-height:1.7}html[data-density=compact] .analysis-column .mnemonic{padding:18px 20px}
.heat-calendar{position:relative;padding-left:22px}.heat-months{height:12px;line-height:12px}.heat-weekdays{position:absolute;left:0;top:20px;display:grid;grid-template-rows:repeat(7,11px);gap:4px;font-size:9px;color:var(--subtext)}
@media(max-width:1199px){#study-content{grid-template-columns:180px minmax(0,1fr);gap:16px}.practice-panels{gap:16px}.focus-main,.topbar{padding-left:24px;padding-right:24px}.analysis-column .mnemonic,.analysis-column .analysis-block{padding:20px 18px}.analysis-column .insight-heading{padding:20px 18px 0}.analysis-column .mnemonic p{font-size:16px}.focus-main .study-card{--study-padding:22px}.rail-body{padding:16px 13px}.session-rail summary{padding:17px 13px}.rail-stats strong{font-size:23px}}
@media(max-width:1023px){#study-content{display:block}.session-rail{position:static;max-height:none;margin-bottom:20px}.session-rail summary span{display:inline}.rail-body{display:grid;grid-template-columns:180px 1fr;gap:0 24px;padding:20px}.rail-stats,.rail-note,.session-position,.progress-track,.grid-legend{grid-column:1}.answer-grid{grid-column:2;grid-row:1/8;grid-template-columns:repeat(auto-fill,minmax(32px,1fr));align-content:start;max-height:200px;overflow:auto;padding:3px}.practice-panels{grid-template-columns:1fr}.analysis-column{position:static;max-height:none}.activity-mount{grid-column:auto}}
@media(max-width:680px){.topbar{padding:16px 14px;gap:10px}.focus-main{padding:20px 14px 0}.top-actions{gap:3px}.style-trigger{font-size:11px;padding:8px}.brand{gap:9px;font-size:12px}.brand small{display:none}.brandmark{padding:8px;font-size:20px}.account-pill{max-width:110px}.top-actions .back-link{font-size:10px}.rail-body{grid-template-columns:1fr;padding:16px;gap:0}.rail-stats{grid-template-columns:1fr 1fr}.rail-note{margin:8px 0}.session-rail .session-position{display:flex;margin-top:10px;gap:12px}.session-rail .progress-track{margin:12px 0}.grid-legend{margin-bottom:12px}.answer-grid{grid-column:1;grid-row:auto;grid-template-columns:repeat(8,minmax(0,1fr));max-height:155px;gap:7px}.answer-cell{min-height:32px}.session-rail summary{padding:15px 16px}.focus-main .study-card{--study-padding:20px}.focus-main .card-header h2{font-size:19px}.question-heading{gap:10px}.type-badge{font-size:12px}.question{font-size:var(--question-size)}.activity-mount{padding:20px}.activity-heading{align-items:start;flex-direction:column;gap:16px}.activity-controls{width:100%}.activity-controls select{flex:1;max-width:none}.activity-stats{gap:18px}.activity-stats strong{font-size:21px}.heat-bottom{flex-direction:column;align-items:start;gap:8px}.style-dialog{padding:22px 18px;max-height:90dvh}.style-heading h2{font-size:18px}.style-toolbar{grid-template-columns:1fr 1fr;gap:12px}.wallpaper-palette{flex-wrap:wrap;padding:15px}.wallpaper-palette>div{flex-basis:100%}.theme-gallery{grid-template-columns:1fr 1fr;gap:10px}.color-fields{grid-template-columns:1fr 1fr;gap:12px}.theme-swatch{height:60px}.theme-card{padding:10px}.analysis-column .analysis-block #analysis{font-size:14px}}
@media(max-width:390px){.brandmark{display:none}.account-pill{max-width:95px}.top-actions .back-link{font-size:9px}.activity-stats{gap:12px}.activity-stats strong{font-size:19px}}

/* Constrain the sticky explanation to its own row above daily activity. */
.practice-panels{display:block}.question-stage{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:22px;align-items:start;min-width:0}.practice-panels>.activity-mount,#round-summary{margin-top:22px}.analysis-column{z-index:1}@media(max-width:1199px){.question-stage{gap:16px}}@media(max-width:1023px){.question-stage{grid-template-columns:minmax(0,1fr);gap:20px}}

/* Focus page: one place for each control and statistic. */
.focus-main .navigation{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.focus-main .navigation>button:last-child{grid-column:2}.focus-main{padding-bottom:36px}.focus-main .question-meta:empty{display:none}

.mastery-steps{display:flex;gap:5px;flex-shrink:0}.mastery-steps i{display:block;width:18px;height:6px;border-radius:8px;background:var(--border)}.mastery-steps .filled{background:var(--correct)}@media(max-width:680px){.mastery-steps i{width:13px}.wrong-progress>div:first-child{flex-wrap:wrap;gap:5px 10px}}

/* Three calendar months. Every day carries counts and accuracy at a readable size. */

.activity-period{font-size:11px;color:var(--subtext);margin:9px 0 0;line-height:1.6}.activity-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin:22px 0}.activity-stats>span{display:flex;align-items:baseline;gap:9px}.activity-stats strong{margin:0;font-variant-numeric:tabular-nums}.heat-calendar{--heat-row:64px;--heat-gap:5px;padding-left:24px;min-width:calc(var(--heat-weeks)*83px + 19px)}.heat-months,.heat-grid{grid-template-columns:repeat(var(--heat-weeks),minmax(78px,1fr));gap:var(--heat-gap)}.heat-months{height:15px;line-height:15px;font-size:11px;margin-bottom:8px}.heat-grid{grid-template-rows:repeat(7,var(--heat-row))}.heat-weekdays{top:23px;grid-template-rows:repeat(7,var(--heat-row));gap:var(--heat-gap);font-size:10px}.heat-weekdays span{display:flex;align-items:center}.heat-day{height:var(--heat-row);min-height:var(--heat-row);display:flex;flex-direction:column;justify-content:space-between;gap:3px;padding:6px 7px;text-align:left;border:1px solid var(--border);border-radius:5px;color:var(--text);font-variant-numeric:tabular-nums;line-height:1.2}.heat-day-date{font-size:10px;color:var(--subtext)}.heat-day-counts{display:flex;justify-content:space-between;gap:4px;font-size:11px;font-weight:600;white-space:nowrap}.heat-day-rate{display:flex;justify-content:space-between;align-items:baseline;gap:4px;font-size:9px;color:var(--subtext)}.heat-day-rate strong{font-size:11px;font-weight:600;color:var(--text)}.heat-day[data-level="1"]{background:color-mix(in srgb,var(--accent) 9%,var(--surface))}.heat-day[data-level="2"]{background:color-mix(in srgb,var(--accent) 17%,var(--surface));border-color:color-mix(in srgb,var(--accent) 30%,var(--border))}.heat-day[data-level="3"]{background:color-mix(in srgb,var(--accent) 25%,var(--surface));border-color:color-mix(in srgb,var(--accent) 50%,var(--border))}.heat-day[data-level="4"]{background:color-mix(in srgb,var(--accent) 35%,var(--surface));border-color:var(--accent)}.heat-day.today{box-shadow:inset 0 0 0 1px var(--accent)}.heat-day.today .heat-day-date{color:var(--text);font-weight:700}.heat-empty{height:var(--heat-row)}.heat-scroll:focus-visible{outline:2px solid var(--accent);outline-offset:5px}.heat-detail{min-height:18px}.heat-bottom{align-items:start}.heat-legend{padding-top:3px}.activity-note{max-width:100%;line-height:1.8}
@media(max-width:680px){.activity-mount{padding:18px 16px}.activity-heading{gap:12px}.activity-controls select{flex:none;width:auto;min-height:34px;font-size:10px}.activity-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 18px}.activity-stats>span{gap:8px}.activity-stats strong{font-size:23px}.heat-calendar{padding-left:22px}.heat-day{padding:6px 7px}.activity-note,.heat-detail{font-size:10px}}