@font-face{font-family:Outfit;src:url('../public/fonts/Outfit-Variable.ttf?v=c15490d96ea3') format('truetype');font-style:normal;font-weight:100 900;font-display:swap}
@font-face{font-family:'Pixelify Sans';src:url('../public/fonts/PixelifySans-Variable.ttf?v=c15490d96ea3') format('truetype');font-style:normal;font-weight:400 700;font-display:swap}

:root{font-family:Outfit,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;--page:#dde1d7;--ink:#29342a;--muted:#677161;--line:#bcc3b5;--surface:#e8ebe3;--surface-strong:#f1f3ec;--key:#e2e6dc;--key-hover:#edf0e7;--accent:#d8ed78;--accent-ink:#283425;--correct:#347351;--wrong:#a34e36;--focus:#557840;--shadow:0 20px 70px #26312625;--number-font:Outfit,sans-serif;--radius:18px;color:var(--ink);background:var(--page);color-scheme:light}
*,*::before,*::after{box-sizing:border-box}
body{margin:0;min-width:300px;min-height:100svh;background:var(--page);color:var(--ink);transition:background-color .2s,color .2s}
body[data-theme='studio']{--page:#dde1d7;--ink:#29342a;--muted:#677161;--line:#bcc3b5;--surface:#e8ebe3;--surface-strong:#f1f3ec;--key:#e2e6dc;--key-hover:#edf0e7;--accent:#d8ed78;--accent-ink:#283425;--correct:#347351;--wrong:#a34e36;--focus:#557840;--number-font:Outfit,sans-serif;color-scheme:light}
body[data-theme='night']{--page:#202527;--ink:#f0f1e9;--muted:#a7b2b0;--line:#444e50;--surface:#2a3235;--surface-strong:#343f42;--key:#2b3437;--key-hover:#354246;--accent:#ace2e7;--accent-ink:#1f373b;--correct:#b8e5b8;--wrong:#ffb2a0;--focus:#ace2e7;--shadow:0 20px 70px #0006;--number-font:Outfit,sans-serif;color-scheme:dark}
body[data-theme='grove']{--page:#e4e8cf;--ink:#2e4937;--muted:#617452;--line:#adbda0;--surface:#edf0da;--surface-strong:#f5f6e7;--key:#e8ecd5;--key-hover:#f3f4e1;--accent:#bbd98a;--accent-ink:#29422d;--correct:#387246;--wrong:#a74d35;--focus:#496f35;--number-font:'Pixelify Sans',monospace;--radius:6px;color-scheme:light}
button,input,select,textarea{font:inherit}button{color:inherit;cursor:pointer;-webkit-tap-highlight-color:transparent}button:disabled{cursor:default;opacity:.5}button,input{touch-action:manipulation}button:focus-visible,input:focus-visible,summary:focus-visible,a:focus-visible{outline:3px solid var(--focus);outline-offset:4px}button{border:0}button .icon{pointer-events:none}a{color:inherit;text-underline-offset:4px}.icon{display:inline-block;width:22px;height:22px;vertical-align:middle;flex-shrink:0;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.asset-icon{width:24px;height:24px;object-fit:contain;vertical-align:middle}.screen-reader{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}[hidden]{display:none!important}
.app-shell{position:relative;isolation:isolate;min-height:100svh}.topbar{height:80px;max-width:1440px;margin:auto;padding:16px 40px;display:flex;align-items:center;justify-content:space-between;gap:16px}.wordmark{display:inline-flex;align-items:center;gap:9px;font-size:23px;font-weight:550;letter-spacing:-1px;text-decoration:none;background:none;padding:0;min-height:44px}.wordmark .icon,.wordmark .asset-icon{width:26px;height:26px}.top-actions{display:flex;align-items:center;gap:6px}.icon-button,.top-actions>button,.dialog-heading>button,.lab-heading>button{width:44px;height:44px;border-radius:50%;display:inline-flex;justify-content:center;align-items:center;background:transparent;color:var(--muted);transition:background .15s,color .15s}.icon-button:hover,.top-actions>button:hover,.dialog-heading>button:hover,.lab-heading>button:hover{background:var(--surface);color:var(--ink)}.connection-dot{width:6px;height:6px;border-radius:50%;background:var(--correct);margin-right:8px}.connection-dot.offline{background:var(--muted)}
#main{width:100%;padding:14px 24px 24px}.practice-frame{width:min(100%,400px);margin:0 auto}.session-track{margin:0 0 25px}.session-line{height:3px;background:var(--line);overflow:hidden;border-radius:3px}.session-line>span{display:block;height:100%;background:var(--ink);border-radius:inherit;transition:width .3s ease}.session-meta{display:flex;justify-content:space-between;gap:16px;margin-top:10px;color:var(--muted);font-size:13px;line-height:20px;font-weight:400}.problem-block{text-align:center;position:relative;min-height:203px;margin-bottom:16px}.context-line{color:var(--muted);font-size:14px;line-height:1.5;min-height:21px;margin:0 0 10px}.problem{font-family:var(--number-font);font-size:clamp(46px,8vw,66px);font-weight:450;letter-spacing:-2.5px;line-height:1.08;margin:0;white-space:nowrap;font-variant-numeric:tabular-nums}.answer-area{display:flex;justify-content:center;align-items:center;min-height:86px;margin:4px 0 0}.answer-input{display:block;width:100%;max-width:100%;height:86px;padding:0 12px;background:transparent;color:var(--ink);border:0;border-radius:8px;text-align:center;font-family:var(--number-font);font-size:64px;font-weight:400;line-height:1;letter-spacing:-2px;caret-color:transparent;font-variant-numeric:tabular-nums;transition:color .16s}.answer-input::placeholder{color:var(--line);opacity:1}.answer-input:focus{outline:none}.answer-input:focus-visible{outline:2px solid var(--focus);outline-offset:1px}.feedback-chip{height:30px;min-height:30px;display:flex;align-items:center;justify-content:center;gap:7px;font-size:14px;color:var(--muted);line-height:1.3}.feedback-chip .icon{width:17px;height:17px}.feedback-chip:empty{visibility:hidden}.is-correct .answer-input,.answer-area.is-correct .answer-input,.feedback-chip.is-correct{color:var(--correct)}.is-wrong .answer-input,.answer-area.is-wrong .answer-input,.feedback-chip.is-wrong{color:var(--wrong)}
.keypad{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;gap:1px;background:var(--line)}.key{height:65px;min-width:0;display:flex;align-items:center;justify-content:center;background:var(--key);font-family:var(--number-font);font-size:35px;line-height:1;font-weight:400;letter-spacing:-1px;transition:background .12s,transform .12s,color .12s;position:relative}.key:hover{background:var(--key-hover)}.key:active,.key.is-pressed{background:var(--surface-strong);transform:scale(.95)}.key:focus-visible{outline-offset:-5px;z-index:1}.key .icon{width:26px;height:26px}.key[data-key='backspace'],.key[data-key='Backspace'],.key[data-key='clear'],.key[data-key='C']{font-family:Outfit,sans-serif;font-size:20px;letter-spacing:0;color:var(--muted)}.next-button{width:100%;min-height:58px;display:flex;align-items:center;justify-content:center;gap:12px;margin-top:13px;border-radius:14px;background:var(--accent);color:var(--accent-ink);font-size:18px;font-weight:500;letter-spacing:-.25px;transition:filter .15s,transform .15s,box-shadow .15s}.next-button .icon{width:20px;height:20px}.next-button:hover{filter:brightness(1.035)}.next-button:active,.next-button.is-pressed{transform:translateY(2px)}.previous-slip{display:flex;align-items:center;justify-content:center;gap:6px;margin:11px auto 0;min-height:40px;padding:8px 14px;background:transparent;color:var(--muted);font-size:13px;line-height:20px;border-radius:8px}.previous-slip .icon{width:15px;height:15px}.previous-slip:hover{color:var(--ink);background:var(--surface)}
body[data-theme='night'] .keypad{gap:7px;border:0;background:none;overflow:visible;border-radius:0}body[data-theme='night'] .key{border-radius:14px;box-shadow:inset 0 1px 0 #ffffff08,0 3px 0 #171d1f}body[data-theme='night'] .key:active,body[data-theme='night'] .key.is-pressed{transform:translateY(2px);box-shadow:inset 0 1px 0 #ffffff08,0 1px 0 #171d1f}body[data-theme='night'] .next-button{box-shadow:0 4px 0 #658d92}body[data-theme='night'] .session-line>span{background:var(--accent)}
body[data-theme='grove'] .app-shell::before{content:'';position:fixed;inset:0;z-index:-1;pointer-events:none;background-image:url('../public/art/grove-background.webp?v=c15490d96ea3');background-repeat:no-repeat;background-size:cover;background-position:center;opacity:.2;image-rendering:pixelated}body[data-theme='grove'] .keypad{border:2px solid var(--line);border-radius:6px;box-shadow:0 4px 0 #a4b495}body[data-theme='grove'] .key{font-size:37px}body[data-theme='grove'] .next-button{border-radius:6px;box-shadow:0 4px 0 #88a567}body[data-theme='grove'] .problem{letter-spacing:-1px}body[data-theme='grove'] .answer-input{letter-spacing:0}body[data-theme='grove'] .session-line,body[data-theme='grove'] .session-line>span{border-radius:0}
.summary-view,.lesson-view{width:min(100%,440px);margin:38px auto 0;text-align:center}.summary-view h1,.lesson-title{font-size:32px;line-height:1.18;font-weight:500;letter-spacing:-1px;margin:18px 0}.result-orbit{width:126px;height:126px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:var(--accent);color:var(--accent-ink);margin:0 auto 24px}.result-orbit .icon,.result-orbit .asset-icon{width:55px;height:55px}.result-orbit h1{font-size:54px;margin:0;font-family:var(--number-font)}.result-stats{display:flex;align-items:center;justify-content:center;gap:28px;margin:26px 0;padding:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.result-stats>span{display:flex;flex-direction:column;gap:5px;font-size:13px;color:var(--muted)}.result-stats strong{font-size:29px;font-weight:500;line-height:1.15;color:var(--ink);font-variant-numeric:tabular-nums}.recommendation{font-size:16px;line-height:1.6;margin:24px 0}.recommendation p,.summary-view>p{color:var(--muted);line-height:1.6}.recommendation button,.lesson-actions>button,.profile-add,.lab-controls>button{background:var(--accent);color:var(--accent-ink);min-height:48px;padding:12px 20px;border-radius:10px;font-weight:500}.secondary-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:16px}.secondary-actions button,.lesson-actions>button.secondary{min-height:44px;background:transparent;color:var(--muted);padding:10px 16px;border-radius:9px}.secondary-actions button:hover,.lesson-actions>button.secondary:hover{background:var(--surface)}.lesson-count{font-size:13px;color:var(--muted);margin-bottom:20px}.lesson-title{font-size:29px}.worked-math{font-family:var(--number-font);font-size:36px;line-height:1.55;letter-spacing:-.8px;padding:24px 12px;margin:24px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);white-space:pre-line}.lesson-explanation{font-size:17px;line-height:1.65;color:var(--muted);text-align:left}.lesson-actions{display:flex;flex-direction:column;gap:8px;margin-top:24px}.guided-hint{font-size:14px;line-height:1.5;color:var(--muted);padding:12px 16px;margin-top:12px;background:var(--surface);border-radius:9px;text-align:left}
dialog{color:var(--ink);background:var(--surface-strong);border:1px solid var(--line);border-radius:24px;padding:0;box-shadow:var(--shadow);width:min(calc(100vw - 32px),460px);max-height:calc(100svh - 40px);overflow:hidden}dialog::backdrop{background:#15241c5c;backdrop-filter:blur(6px)}.dialog-heading,.lab-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px 14px;border-bottom:1px solid var(--line)}.dialog-heading h2,.lab-heading h2{font-size:23px;line-height:1.3;letter-spacing:-.5px;font-weight:500;margin:0}.settings-scroll{padding:24px;max-height:calc(100svh - 132px);overflow:auto;overscroll-behavior:contain}.settings-scroll h3{font-size:14px;font-weight:500;margin:0 0 13px}.theme-choices{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:0 0 25px}.theme-choice{min-width:0;padding:5px 5px 10px;background:transparent;border:2px solid transparent;border-radius:13px;text-align:left}.theme-choice[aria-pressed='true']{border-color:var(--focus)}.theme-title{display:block;font-size:13px;margin:9px 6px 0}.theme-swatch{display:flex;align-items:center;justify-content:center;height:73px;border-radius:7px;background:#dde1d7;color:#29342a;position:relative;overflow:hidden;font-size:30px;line-height:1;font-weight:450}.theme-swatch::after{content:'';position:absolute;left:25%;right:25%;bottom:9px;height:4px;background:#d8ed78;border-radius:2px}.theme-choice[data-theme='night'] .theme-swatch,.theme-swatch.night{background:#202527;color:#ace2e7}.theme-choice[data-theme='night'] .theme-swatch::after,.theme-swatch.night::after{background:#ace2e7}.theme-choice[data-theme='grove'] .theme-swatch,.theme-swatch.grove{background:#e4e8cf;color:#2e4937;font-family:'Pixelify Sans',monospace}.theme-choice[data-theme='grove'] .theme-swatch::after,.theme-swatch.grove::after{background:#bbd98a}.setting-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 0;border-top:1px solid var(--line);font-size:15px;line-height:1.45}.setting-row label,.setting-row>span:first-child{flex:1}.setting-row small{display:block;font-size:12px;color:var(--muted);margin-top:3px}.segmented{display:flex;padding:3px;border:1px solid var(--line);border-radius:10px;flex-shrink:0}.segmented button{min-width:42px;min-height:44px;padding:6px 10px;border-radius:6px;background:transparent;color:var(--muted);font-size:13px}.segmented button[aria-pressed='true'],.segmented button.active{background:var(--ink);color:var(--page)}.switch,[role='switch']{width:46px;min-width:46px;height:44px;background:transparent;border-radius:30px;padding:4px;position:relative;border:0}.switch::before,[role='switch']::before{content:'';position:absolute;inset:8px 0;background:var(--line);border-radius:30px}.switch::after,[role='switch']::after{content:'';position:relative;display:block;width:20px;height:20px;border-radius:50%;background:var(--surface-strong);box-shadow:0 1px 3px #0002;transform:translateX(0);transition:transform .18s}.switch[aria-checked='true']::before,[role='switch'][aria-checked='true']::before{background:var(--focus)}.switch[aria-checked='true']::after,[role='switch'][aria-checked='true']::after{transform:translateX(18px)}.setting-note{font-size:12px;line-height:1.6;color:var(--muted);margin:12px 0}.settings-links{display:flex;flex-wrap:wrap;gap:7px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}.settings-links button{background:none;min-height:44px;padding:8px 12px;color:var(--muted);font-size:13px;border-radius:8px}.settings-links button:hover{background:var(--surface)}.profile-row{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:66px;padding:12px 0;border-bottom:1px solid var(--line)}.profile-row button{background:transparent;min-height:44px;padding:10px 12px;border-radius:8px}.profile-row button:first-child{flex:1;text-align:left}.profile-row [aria-pressed='true']{color:var(--correct);font-weight:500}.profile-add{width:100%;margin-top:20px}.profile-add input,.profile-row input{width:100%;background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:12px}
.lab-dialog{width:min(calc(100vw - 32px),760px)}.lab-tabs{display:flex;gap:4px;overflow:auto;padding:12px 20px 0;border-bottom:1px solid var(--line)}.lab-tabs button{background:none;color:var(--muted);min-height:44px;padding:10px 16px;border-bottom:2px solid transparent;white-space:nowrap;font-size:14px}.lab-tabs button[aria-selected='true'],.lab-tabs button[aria-pressed='true'],.lab-tabs button.active{border-color:var(--ink);color:var(--ink)}.lab-pane{padding:22px 24px;max-height:calc(100svh - 205px);overflow:auto;overscroll-behavior:contain}.lab-pane h3{font-size:18px;font-weight:500;margin:0 0 12px}.lab-pane p{font-size:14px;line-height:1.6;color:var(--muted)}.skill-row{display:grid;grid-template-columns:minmax(110px,1fr) minmax(80px,1.4fr) 65px;gap:14px;align-items:center;padding:14px 0;border-bottom:1px solid var(--line)}.skill-label{font-size:14px;line-height:1.4}.skill-bar{height:5px;overflow:hidden;border-radius:5px;background:var(--line)}.skill-bar i{display:block;height:100%;background:var(--focus);border-radius:inherit}.skill-level{font-size:12px;color:var(--muted);text-align:right}.trace-list details{border-bottom:1px solid var(--line);padding:12px 0}.trace-list summary{cursor:pointer;min-height:30px;line-height:1.6;font-size:13px}.trace-list pre{max-width:100%;overflow:auto;white-space:pre-wrap;word-break:break-word;font-family:monospace;font-size:11px;line-height:1.6;color:var(--muted);background:var(--surface);padding:14px;border-radius:8px}.lab-controls{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:16px 0}.lab-controls select,.lab-controls input{min-height:44px;max-width:100%;border:1px solid var(--line);border-radius:8px;padding:8px 12px;background:var(--surface);color:var(--ink)}.toast{position:fixed;bottom:max(22px,env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);z-index:20;width:max-content;max-width:calc(100% - 32px);padding:13px 20px;border-radius:12px;background:var(--ink);color:var(--page);box-shadow:var(--shadow);font-size:14px;text-align:center;line-height:1.5}
@keyframes question-in{from{opacity:.4;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}.question-enter .problem,.question-enter .answer-area{animation:question-in .2s ease-out}.is-wrong .answer-area{animation:answer-nudge .2s ease-out}@keyframes answer-nudge{0%,100%{transform:translateX(0)}35%{transform:translateX(-4px)}70%{transform:translateX(3px)}}
@media(min-width:1000px) and (min-height:800px){#main{padding-top:14px}.practice-frame{width:420px}.problem-block{min-height:203px;margin-bottom:12px}.key{height:63px}}
@media(max-width:600px){.topbar{height:70px;padding:12px 20px}.wordmark{font-size:22px}.top-actions{gap:1px}#main{padding:12px 22px 20px}.session-track{margin-bottom:24px}.practice-frame{max-width:390px}.problem{font-size:58px}.answer-input{font-size:62px}.key{height:66px}.summary-view,.lesson-view{margin-top:30px}.settings-scroll{padding:20px}.lab-pane{padding:18px}.lab-tabs{padding-left:12px;padding-right:12px}.skill-row{gap:10px;grid-template-columns:minmax(90px,1fr) minmax(60px,1fr) 59px}}
@media(max-height:780px){.topbar{height:60px;padding-top:8px;padding-bottom:8px}#main{padding-top:4px;padding-bottom:12px}.practice-frame{max-width:370px}.session-track{margin-bottom:12px}.session-meta{margin-top:7px;font-size:12px}.problem-block{min-height:144px;margin-bottom:10px}.context-line{font-size:12px;min-height:18px;line-height:18px;margin-bottom:3px}.problem{font-size:47px;line-height:1.08;letter-spacing:-1.7px}.answer-area{min-height:59px;margin-top:0}.answer-input{height:59px;font-size:49px}.feedback-chip{height:24px;min-height:24px;font-size:12px}.key{height:47px;font-size:29px}.next-button{min-height:49px;margin-top:11px;font-size:16px}.previous-slip{margin-top:7px;min-height:44px;font-size:12px;padding:5px 10px}body[data-theme='night'] .keypad{gap:5px}body[data-theme='grove'] .key{font-size:31px}.summary-view,.lesson-view{margin-top:16px}.result-orbit{width:88px;height:88px;margin-bottom:16px}.result-stats{margin:16px 0;padding:14px 0}.worked-math{padding:15px 8px;margin:18px 0;font-size:30px}.lesson-title{font-size:26px}}
@media(max-width:350px){#main{padding-right:16px;padding-left:16px}.topbar{padding-right:14px;padding-left:14px}.top-actions{gap:0}.wordmark{font-size:20px}.icon-button,.top-actions>button{width:44px}.problem{font-size:46px}.setting-row{gap:8px;font-size:14px}.segmented button{min-width:34px;padding:6px 8px}.theme-choices{gap:5px}.theme-title{margin-left:2px}.settings-scroll{padding:16px}}
.wordmark-dot{width:6px;height:6px;align-self:center;margin:7px 0 0 -5px;border-radius:50%;background:var(--ink)}
.connection-dot[data-status='local'],.connection-dot[data-status='offline'],.connection-dot[data-status='waiting']{background:var(--muted);opacity:.5}
.connection-dot[data-status='rejected']{background:var(--wrong)}
.session-track .session-meta{margin-top:0;margin-bottom:10px}
.problem.is-context{font-family:Outfit,sans-serif;font-size:27px;font-weight:450;line-height:1.28;letter-spacing:-.55px;white-space:normal;text-wrap:pretty;overflow-wrap:break-word;margin:0 auto;max-width:420px}
.answer-area{position:relative}
.answer-area::after{content:'';position:absolute;left:50%;bottom:3px;transform:translateX(-50%);width:64px;height:1px;background:var(--line);pointer-events:none}
.answer-area:has(.answer-input:focus-visible)::after{width:84px;height:2px;background:var(--focus)}
.answer-input:focus-visible{outline:none}
.is-correct .answer-area::after{background:var(--correct)}
.is-wrong .answer-area::after{background:var(--wrong)}
body[data-theme='studio'] .problem:not(.is-context),body[data-theme='studio'] .answer-input,body[data-theme='studio'] .key{font-weight:350}
.answer-input{min-width:0;flex:1}
.answer-unit{position:absolute;right:8px;bottom:21px;max-width:62px;font-family:Outfit,sans-serif;font-size:14px;line-height:1.2;letter-spacing:0;color:var(--muted)}
.is-correct .feedback-chip{color:var(--correct)}
.is-wrong .feedback-chip{color:var(--wrong)}
.key:disabled{opacity:1}
.previous-slip{padding:0;min-height:44px}
.previous-slip:hover{background:transparent}
.previous-slip button{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;padding:8px 12px;background:transparent;color:var(--muted);border-radius:8px;font-size:13px}
.previous-slip button:hover{background:var(--surface);color:var(--ink)}
.text-button,.lesson-actions>.text-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 14px;border-radius:8px;background:transparent;color:var(--muted);font-size:14px;font-weight:400}
.text-button:hover,.lesson-actions>.text-button:hover{background:var(--surface);color:var(--ink)}
.lesson-title{font-size:15px;line-height:1.4;letter-spacing:0;font-weight:400;color:var(--muted);margin:12px 0}
.worked-math{font-size:30px;font-weight:450;line-height:1.4;letter-spacing:-.5px;white-space:normal;overflow-wrap:break-word;text-wrap:pretty}
.result-stats strong small{font-size:17px;font-weight:400;color:var(--muted)}
.theme-swatch{gap:3px;padding-bottom:5px}
.theme-swatch i{display:block;width:15px;height:12px;border:1px solid #adb6a5;border-radius:1px;background:#e8ebe3;box-shadow:0 15px 0 #e8ebe3,0 16px 0 #adb6a5;transform:translateY(-8px)}
.swatch-night i{border:0;border-radius:3px;background:#354246;box-shadow:0 2px 0 #141d1f,0 16px 0 #354246,0 18px 0 #141d1f}
.swatch-grove i{border-color:#9fb38c;border-radius:0;background:#eff2dc;box-shadow:0 15px 0 #eff2dc,0 17px 0 #9fb38c}
.theme-swatch::after{left:22%;right:22%;height:5px}
.setting-row>span:first-child{display:flex;align-items:center;gap:8px}
.build-label{font-size:11px;line-height:1.4;color:var(--muted);margin:20px 0 0;overflow-wrap:anywhere}
.profile-row{width:100%;background:transparent;text-align:left;border-radius:0;color:var(--ink);font-size:15px}
.profile-row>span{flex:1;min-width:0;overflow-wrap:anywhere}
.profile-row:hover{background:var(--surface)}
.profile-row[aria-pressed='true']{color:var(--correct)}
.profile-add{display:flex;align-items:center;gap:8px;padding:0;background:transparent;color:var(--ink);border-radius:0;font-weight:400}
.profile-add input{flex:1;min-width:0;width:auto;min-height:46px}
.profile-add>.icon-button{flex:0 0 44px;background:var(--accent);color:var(--accent-ink);border-radius:10px}
.skill-row{grid-template-columns:minmax(110px,1fr) minmax(70px,1.2fr) 104px}
.skill-label{display:flex;flex-direction:column;gap:3px}
.skill-label>span:last-child{font-size:11px;color:var(--muted)}
.skill-level{line-height:1.5;white-space:normal;text-wrap:pretty}
.lab-pane{max-height:calc(100svh - 270px)}
.lab-footer{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 20px;border-top:1px solid var(--line)}
.lab-footer>span{font-size:11px;line-height:1.5;color:var(--muted)}
.lab-footer>.text-button{flex-shrink:0}
.trace-list summary{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;min-height:44px;padding:5px 0}
.trace-list summary>span{min-width:0}
.trace-list summary small{flex-shrink:0;color:var(--muted);font-size:11px}
.trace-list details>button{min-height:44px;padding:9px 13px;background:var(--surface);color:var(--ink);border-radius:8px;font-size:13px}
.simulation-summary{margin:22px 0 12px;font-variant-numeric:tabular-nums}
.simulation-trend{display:flex;flex-direction:column;gap:10px;margin:18px 0 20px}
.simulation-trend>div{display:grid;grid-template-columns:40px minmax(0,1fr) 42px;align-items:center;gap:12px}
.simulation-trend span{font-size:12px;line-height:1.5;color:var(--muted);font-variant-numeric:tabular-nums}
.simulation-trend span:last-child{text-align:right}
.simulation-trend meter{display:block;width:100%;height:9px;border:0;border-radius:5px;background:var(--line);appearance:none;-webkit-appearance:none}
.simulation-trend meter::-webkit-meter-bar{background:var(--line);border:0;border-radius:5px;height:9px}
.simulation-trend meter::-webkit-meter-optimum-value{background:var(--focus);border-radius:5px}
.simulation-trend meter::-moz-meter-bar{background:var(--focus);border-radius:5px}
.toast{display:flex;align-items:center;justify-content:center;gap:16px;visibility:hidden;opacity:0;pointer-events:none;transition:opacity .15s,visibility .15s}
.toast.visible{visibility:visible;opacity:1;pointer-events:auto}
.toast button{flex-shrink:0;background:transparent;color:inherit;min-height:44px;padding:6px 10px;border-radius:6px;text-decoration:underline;text-underline-offset:4px}
@media(max-width:600px){.problem.is-context{font-size:25px}.worked-math{font-size:26px}.skill-row{grid-template-columns:minmax(90px,1fr) minmax(45px,.7fr) 88px;gap:10px}.skill-level{font-size:11px}.lab-footer{padding:8px 16px}.trace-list summary{flex-direction:column;gap:4px}}
@media(max-height:780px){.session-track .session-meta{margin-bottom:7px}.problem.is-context{font-size:23px;line-height:1.24}.answer-unit{bottom:14px;font-size:13px}.previous-slip{min-height:44px}.previous-slip button{font-size:12px}.lesson-title{font-size:15px}.worked-math{font-size:24px}.guided-hint{font-size:12px;line-height:1.4;padding:8px 12px;margin-top:8px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}