@font-face{font-family:Montserrat;src:url(/fonts/montserrat-latin-variable.woff2)format("woff2");font-weight:100 900;font-display:swap}:root{--font-body:Montserrat, "Avenir Next", sans-serif;--font-mono:"SFMono-Regular", Consolas, monospace;--ink:#161817;--ink-muted:#58616a;--canvas:#eff4f8;--paper:#fffef8;--surface:#fff;--blue:#3155ed;--blue-hover:#2443ca;--blue-soft:#dce6ff;--yellow:#ffe458;--yellow-soft:#fff7d6;--pink:#ffd7d9;--green:#d9efdc;--danger:#a02a35;--line:#d5d9da;--border:2px solid var(--ink);--shadow-small:2px 2px 0 var(--ink);--shadow:4px 4px 0 var(--ink);--shadow-large:6px 6px 0 var(--ink);--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:24px;--space-6:32px;--space-7:48px;--space-8:64px;--text-small:.75rem;--text-body:.875rem;--text-large:1rem;--sidebar-width:232px;--page-width:1160px;color:var(--ink);background:var(--canvas);font-family:var(--font-body);font-synthesis:none}*,:before,:after{box-sizing:border-box}body{background-image:linear-gradient(#16233505 1px,#0000 1px),linear-gradient(90deg,#16233505 1px,#0000 1px);background-size:32px 32px;margin:0;line-height:1.6}h1,h2,h3,p{overflow-wrap:anywhere;margin:0}h1,h2,h3{letter-spacing:-.045em;font-weight:800;line-height:1.15}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}button,a,input,textarea{-webkit-tap-highlight-color:transparent}:focus-visible{outline:3px solid var(--blue);outline-offset:4px}::selection{color:var(--ink);background:var(--yellow)}svg{vertical-align:middle;flex-shrink:0}.icon{width:16px;height:16px}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.skip-link{left:-10000px;top:var(--space-3);z-index:70;padding:var(--space-3) var(--space-4);background:var(--paper);color:var(--ink);border:var(--border);font-size:var(--text-small);font-weight:750;position:fixed}.skip-link:focus{left:var(--space-3)}main:focus{outline:none}.button{justify-content:center;align-items:center;gap:var(--space-2);border:var(--border);font-size:var(--text-small);text-align:center;white-space:nowrap;box-shadow:var(--shadow-small);border-radius:0;font-weight:750;line-height:1.25;display:inline-flex}.button svg{pointer-events:none;width:17px;height:17px}.button-default{min-height:42px;padding:11px 16px}.button-small{min-height:34px;padding:8px 12px;font-size:.6875rem}.button-large{min-height:52px;font-size:var(--text-body);padding:15px 22px}.button-icon{width:40px;height:40px;padding:0}.button-primary{color:#fff;background:var(--blue)}.button-primary:hover:not(:disabled){background:var(--blue-hover)}.button-outline{color:var(--ink);background:var(--paper)}.button-outline:hover:not(:disabled){background:var(--yellow-soft)}.button-secondary{color:var(--ink);background:var(--yellow)}.button-destructive{color:#fff;background:var(--danger)}.button-ghost{color:var(--ink);box-shadow:none;background:0 0;border-color:#0000}.button-ghost:hover:not(:disabled){background:var(--blue-soft)}.button-link{color:var(--blue);box-shadow:none;text-underline-offset:4px;background:0 0;border:0;text-decoration:underline}.badge{border:1px solid var(--ink);align-items:center;width:fit-content;padding:4px 8px;font-size:.6875rem;font-weight:650;line-height:1.4;display:inline-flex}.badge-primary{background:var(--blue);color:#fff}.badge-secondary{background:var(--yellow-soft)}.badge-outline{background:var(--paper)}.badge-destructive{background:var(--pink);color:var(--danger)}.label{font-size:var(--text-small);font-weight:750;display:block}.input,.textarea{border:1.5px solid var(--ink);background:var(--surface);width:100%;color:var(--ink);font-size:var(--text-body);border-radius:0;padding:11px 12px;line-height:1.6;display:block}.input{min-height:44px}.textarea{resize:vertical;min-height:96px}.input::placeholder,.textarea::placeholder{color:var(--ink-muted)}.input:disabled,.textarea:disabled{opacity:.6;cursor:not-allowed}.input[aria-invalid=true],.textarea[aria-invalid=true]{border-color:var(--danger)}.dialog-overlay{z-index:50;background:#171d28a6;position:fixed;inset:0}.dialog-content{z-index:51;background:var(--paper);border:var(--border);width:min(600px,100% - 40px);max-height:calc(100dvh - 48px);box-shadow:var(--shadow-large);padding:var(--space-6);position:fixed;top:50%;left:50%;overflow-y:auto;transform:translate(-50%,-50%)}.dialog-header{margin-bottom:20px;padding-right:22px}.dialog-title{font-size:1.75rem;font-weight:800}.dialog-description{margin-top:var(--space-2);font-size:var(--text-small);color:var(--ink-muted);max-width:52ch;line-height:1.7}.dialog-close{width:32px;height:32px;color:var(--ink-muted);background:0 0;border:0;place-items:center;display:grid;position:absolute;top:18px;right:18px}.dialog-close:hover{color:var(--ink);background:var(--yellow-soft)}.dialog-footer{justify-content:flex-end;gap:var(--space-3);padding-top:var(--space-5);margin-top:var(--space-5);border-top:1px solid var(--line);display:flex}.form-field+.form-field{margin-top:20px}.field-heading{justify-content:space-between;align-items:baseline;gap:var(--space-3);margin-bottom:var(--space-2);display:flex}.field-count,.field-hint{color:var(--ink-muted);font-size:.6875rem}.field-hint{margin-top:var(--space-2)}.field-error{margin-top:var(--space-2);color:var(--danger);font-size:var(--text-small)}.select-trigger{justify-content:space-between;align-items:center;gap:var(--space-3);border:1.5px solid var(--ink);background:var(--paper);min-height:42px;color:var(--ink);font-size:var(--text-small);text-align:left;padding:10px 12px;font-weight:600;display:inline-flex}.select-trigger>span{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.select-chevron{width:16px;height:16px;color:var(--ink-muted)}.select-content{z-index:60;min-width:160px;max-height:min(360px, var(--radix-select-content-available-height));background:var(--paper);color:var(--ink);border:var(--border);box-shadow:var(--shadow);position:relative;overflow:hidden}.select-content-popper{margin-block:var(--space-1)}.select-viewport{padding:var(--space-1)}.select-viewport-popper{width:100%;min-width:var(--radix-select-trigger-width)}.select-item{min-height:38px;font-size:var(--text-small);cursor:pointer;-webkit-user-select:none;user-select:none;outline:none;align-items:center;padding:8px 34px 8px 10px;display:flex;position:relative}.select-item[data-highlighted]{background:var(--blue-soft)}.select-item[data-state=checked]{font-weight:750}.select-item[data-disabled]{opacity:.5;pointer-events:none}.select-indicator{place-items:center;display:grid;position:absolute;right:10px}.select-scroll-button{justify-content:center;padding:4px;display:flex}.select-label{font-size:var(--text-small);padding:8px 10px;font-weight:750}.select-separator{background:var(--line);height:1px;margin:4px 0}.table-scroll{width:100%;overflow-x:auto}.table{border-collapse:collapse;width:100%;font-size:var(--text-small);caption-side:bottom}.table-row{border-bottom:1px solid var(--line)}.table-body .table-row:last-child{border-bottom:0}.table-body .table-row:hover,.table-row[data-state=selected]{background:#eff4f880}.table-head{text-align:left;background:var(--canvas);border-block:1px solid var(--line);padding:10px 14px;font-size:.6875rem;font-weight:750}.table-cell{vertical-align:top;padding:18px 14px}.table-footer{background:var(--canvas);font-weight:650}.table-caption{padding-top:var(--space-4);color:var(--ink-muted)}.brand{align-items:center;gap:var(--space-3);letter-spacing:-.06em;font-size:22px;font-weight:900;line-height:.95;display:inline-flex}.brand-mark{background:var(--yellow);width:46px;height:48px;color:var(--ink);border:var(--border);box-shadow:var(--shadow-small);place-items:center;display:grid}.brand-dot{color:var(--blue)}.eyebrow,.subject-number,.question-label{letter-spacing:.14em;text-transform:uppercase;font-size:.625rem;font-weight:750}.eyebrow{align-items:center;gap:var(--space-2);display:flex}.live-dot,.mini-dot{background:var(--blue);flex-shrink:0;width:6px;height:6px;display:inline-block}.pill{border:1px solid var(--line);background:var(--paper);white-space:nowrap;padding:4px 8px;font-size:.625rem;font-weight:650}.card-topic{border:1px solid var(--ink);background:var(--yellow);align-items:center;padding:5px 9px;font-size:.6875rem;font-weight:750;display:inline-flex}kbd{border:1px solid var(--line);background:var(--paper);color:var(--ink-muted);font-family:var(--font-mono);border-bottom:2px solid #adb4ba;padding:2px 6px;font-size:.625rem;line-height:1.4;display:inline-block}.error{border:1px solid var(--danger);background:var(--pink);padding:var(--space-3);margin-block:var(--space-4);font-size:var(--text-small)}.landing-nav{max-width:var(--page-width);padding:var(--space-6) var(--space-5);border-bottom:var(--border);justify-content:space-between;align-items:center;margin-inline:auto;display:flex}.nav-link{align-items:center;gap:var(--space-3);font-size:var(--text-body);font-weight:750;display:inline-flex}.nav-link:hover{color:var(--blue)}.landing-main{max-width:var(--page-width);padding-inline:var(--space-5);margin-inline:auto}.landing-hero{gap:var(--space-8);grid-template-columns:1.15fr 1fr;align-items:center;padding-block:88px 96px;display:grid}.topic-stamp,.sample-tab{align-items:center;gap:var(--space-2);border:var(--border);background:var(--yellow);letter-spacing:.1em;text-transform:uppercase;padding:8px 12px;font-size:.625rem;font-weight:800;display:inline-flex}.topic-stamp{box-shadow:var(--shadow-small)}.hero-copy h1{margin-block:var(--space-5);letter-spacing:-.055em;font-size:clamp(42px,5.2vw,66px);font-weight:850;line-height:1.04}.hero-copy h1 span{color:var(--blue)}.hero-copy>p{max-width:52ch;color:var(--ink-muted);font-size:.9375rem;line-height:1.9}.hero-cta{margin-top:var(--space-5);box-shadow:var(--shadow)}.hero-copy .hero-note{margin-top:var(--space-5);font-size:.6875rem;line-height:1.7}.sample-stack{isolation:isolate;margin-right:var(--space-4);position:relative}.sample-stack:before{content:"";background:var(--blue-soft);border:var(--border);z-index:-1;position:absolute;inset:45px -14px -13px 14px;transform:rotate(3deg)}.sample-tab{margin-left:var(--space-5);background:var(--pink);margin-bottom:-2px}.sample-card{background:var(--yellow-soft);border:var(--border);padding:var(--space-6);box-shadow:var(--shadow)}.sample-card h2{margin-block:var(--space-5);font-size:clamp(26px,2.8vw,36px);line-height:1.18}.sample-card p{font-size:var(--text-body);line-height:1.9}.sample-card a{justify-content:space-between;align-items:center;gap:var(--space-3);margin-top:var(--space-6);padding-top:var(--space-4);border-top:var(--border);font-size:var(--text-small);font-weight:750;display:flex}.stack-caption{margin-top:var(--space-6);text-align:right;letter-spacing:.14em;font-size:.5625rem;font-weight:750;display:block}.subject-section{border-top:var(--border);padding-block:var(--space-6) var(--space-8)}.subject-heading{justify-content:space-between;align-items:center;gap:var(--space-5);margin-bottom:var(--space-5);display:flex}.subject-heading h2{font-size:26px}.subject-heading>span{color:var(--ink-muted);white-space:nowrap;font-size:.6875rem}.subject-grid{gap:var(--space-5);grid-template-columns:repeat(3,1fr);display:grid}.subject-card{padding:var(--space-5);border:var(--border);box-shadow:var(--shadow-small);flex-direction:column;display:flex}.subject-card:hover{outline:2px solid var(--blue);outline-offset:4px}.subject-blue{background:var(--blue-soft)}.subject-yellow{background:var(--yellow-soft)}.subject-pink{background:var(--pink)}.subject-number{letter-spacing:.03em;font-size:.5625rem}.subject-card h3{margin-block:var(--space-5) var(--space-3);font-size:22px}.subject-card p{font-size:var(--text-small);margin-bottom:var(--space-5);line-height:1.8}.subject-card>svg{align-self:flex-end;width:20px;margin-top:auto}.landing-footer{max-width:calc(var(--page-width) - 48px);border-top:var(--border);padding-block:var(--space-5);justify-content:space-between;gap:var(--space-5);font-size:var(--text-small);margin-inline:auto;font-weight:650;display:flex}.landing-footer a{align-items:center;gap:var(--space-2);display:inline-flex}.app-shell{min-height:100dvh}.sidebar{width:var(--sidebar-width);padding:var(--space-6) 20px var(--space-5);background:var(--paper);border-right:var(--border);flex-direction:column;display:flex;position:fixed;inset:0 auto 0 0}.sidebar .brand{margin-bottom:54px;font-size:21px}.nav-label{color:var(--ink-muted);letter-spacing:.15em;margin-bottom:var(--space-3);font-size:.5625rem;font-weight:750}.button.nav-item{justify-content:flex-start;gap:var(--space-3);width:100%;font-size:var(--text-small);margin-bottom:var(--space-2);padding:13px 10px;font-weight:650;display:flex}.button.nav-item.active{background:var(--yellow);border:var(--border);box-shadow:var(--shadow-small);font-weight:750}.nav-count,.muted-count{font-variant-numeric:tabular-nums;margin-left:auto;font-size:.625rem}.nav-count{background:var(--paper);border:1px solid var(--ink);padding:1px 6px}.muted-count{color:var(--ink-muted)}.sidebar-note{padding-top:var(--space-7);margin-top:auto}.sidebar-note h3{margin-bottom:var(--space-3);font-size:25px;line-height:1.1}.sidebar-note p{color:var(--ink-muted);font-size:.6875rem;line-height:1.8}.workspace-footer{align-items:center;gap:var(--space-3);border-top:1px solid var(--line);margin-top:var(--space-5);padding-top:var(--space-5);font-size:.625rem;font-weight:750;display:flex}.workspace-footer small{color:var(--ink-muted);margin-top:2px;font-size:.5625rem;font-weight:500;display:block}.avatar{background:var(--blue-soft);border:1px solid var(--ink);flex-shrink:0;place-items:center;width:32px;height:34px;display:grid}.workspace{margin-left:var(--sidebar-width);flex-direction:column;min-height:100dvh;display:flex}.topbar{justify-content:space-between;align-items:center;gap:var(--space-4);min-height:80px;padding:var(--space-4) var(--space-6);border-bottom:var(--border);background:var(--paper);font-size:.6875rem;font-weight:650;display:flex}.breadcrumb{color:var(--ink-muted)}.slash{padding-inline:var(--space-3);color:#959da4}.workspace main{width:100%;max-width:1080px;padding:36px var(--space-6) var(--space-5);margin-inline:auto}.page-heading h1{margin-block:var(--space-3);font-size:clamp(28px,3vw,39px)}.page-heading>p{font-size:var(--text-small);color:var(--ink-muted);line-height:1.8}.stats{border:var(--border);background:var(--paper);box-shadow:var(--shadow-small);margin-top:var(--space-5);grid-template-columns:1fr 1fr 1.2fr;display:grid}.stats>div{align-items:center;gap:var(--space-3);border-left:1px solid var(--line);padding:18px 20px;display:flex}.stats>div:first-child{border-left:0}.stat-icon{background:var(--blue-soft);border:1px solid var(--ink);flex-shrink:0;place-items:center;width:34px;height:36px;display:grid}.stat-icon.amber{background:var(--yellow-soft)}.stat-icon.green{background:var(--green)}.stat-label{color:var(--ink-muted);margin-bottom:6px;font-size:.5625rem;font-weight:650;display:block}.stats strong{letter-spacing:-.04em;font-variant-numeric:tabular-nums;font-size:25px;font-weight:800;line-height:1;display:block}.stats small{color:var(--ink-muted);letter-spacing:0;margin-left:6px;font-size:.5625rem;font-weight:500;display:inline}.section-toolbar{justify-content:space-between;align-items:center;gap:var(--space-4);margin-block:var(--space-6) var(--space-4);display:flex}.section-toolbar>div{align-items:center;gap:var(--space-3);display:flex}.section-toolbar h2{font-size:var(--text-large);letter-spacing:-.03em}.topic-filter{min-width:168px;max-width:220px}.flashcard{border:var(--border);background:var(--paper);box-shadow:var(--shadow)}.card-top{justify-content:space-between;align-items:center;gap:var(--space-3);padding:22px 26px;display:flex}.card-position{color:var(--ink-muted);font-size:.625rem;font-weight:600}.card-body{padding:22px var(--space-6) 36px;text-align:center}.question-label{color:var(--ink-muted);font-size:.5625rem}.study-question{max-width:670px;margin:20px auto var(--space-5)}.study-question .card-markdown{letter-spacing:-.035em;text-align:center;font-size:clamp(23px,2.6vw,31px);font-weight:750;line-height:1.4}.recall-hint{color:var(--ink-muted);font-size:.6875rem}.card-bottom{justify-content:space-between;align-items:center;gap:var(--space-4);padding:var(--space-4) var(--space-5);border-top:var(--border);background:var(--blue-soft);display:flex}.card-bottom>span{align-items:center;gap:var(--space-2);font-size:.625rem;font-weight:650;display:flex}.answer{border-top:1px solid var(--line);padding-top:var(--space-5);margin-top:var(--space-6);text-align:left}.answer .card-markdown{margin-top:var(--space-3);font-size:.9375rem;line-height:1.9}.rating-area{text-align:center;min-height:64px}.rating-area>p{margin-block:var(--space-5) var(--space-3);font-size:var(--text-small);font-weight:650}.rating-area .keyboard-hint{color:var(--ink-muted);font-size:.625rem;font-weight:500}.keyboard-hint kbd{margin-inline:3px}.rating-buttons{gap:var(--space-3);grid-template-columns:repeat(3,1fr);display:grid}.button.rating{color:var(--ink);text-align:left;white-space:normal;justify-content:flex-start;padding:14px 12px}.rating>span{font-size:.6875rem}.rating small{margin-top:5px;font-size:.5625rem;font-weight:500;display:block}.rating kbd{margin-left:auto}.rating.again{background:var(--pink)}.rating.partial{background:var(--yellow-soft)}.rating.remembered{background:var(--green)}.rating:hover:not(:disabled){outline:2px solid var(--ink);outline-offset:2px}.partial-symbol{line-height:1;font-size:21px!important}.study-footer{justify-content:space-between;gap:var(--space-4);border-top:1px solid var(--line);margin-top:var(--space-5);padding-top:var(--space-4);color:var(--ink-muted);font-size:.5625rem;display:flex}.study-footer>span:first-child{align-items:center;gap:var(--space-2);display:flex}.footer-line{background:var(--blue);width:14px;height:3px}.page-footer{justify-content:space-between;gap:var(--space-4);margin:auto var(--space-6) 0;padding-block:var(--space-5);border-top:1px solid var(--line);color:var(--ink-muted);font-size:.5625rem;display:flex}.page-footer>span:first-child{font-weight:750}.empty{justify-content:center;align-items:center;gap:var(--space-4);text-align:center;min-height:320px;padding:var(--space-7) var(--space-5);flex-direction:column;display:flex}.empty h2{font-size:28px}.empty p{max-width:48ch;color:var(--ink-muted);font-size:var(--text-small)}.empty-cards,.done-icon{border:var(--border);background:var(--yellow);width:52px;height:54px;margin-bottom:var(--space-2);place-items:center;display:grid}.loading-dot{border:var(--border);background:var(--yellow);width:16px;height:16px}.fallback{max-width:600px;padding:var(--space-6);margin:80px auto}.fallback p{margin-block:var(--space-5)}.card-library{border:var(--border);background:var(--paper);min-width:0;box-shadow:var(--shadow)}.library-search{align-items:center;gap:var(--space-3);padding:var(--space-4);display:flex}.library-search .input{max-width:440px;font-size:var(--text-small)}.card-library .table{min-width:680px}.card-library .table-head .button{min-height:30px;padding:4px 0;font-size:.625rem}.card-library .table-head .button:hover{color:var(--blue);background:0 0}.card-library .table-cell:first-child{width:32%;font-weight:650}.card-library .table-cell:nth-child(2){width:30%}.card-library .table-cell:nth-child(3){min-width:110px}.card-library .table-cell:nth-child(4){min-width:114px;color:var(--ink-muted);font-size:.6875rem}.card-library .table-cell:last-child{text-align:center;font-variant-numeric:tabular-nums}.library-answer summary{color:var(--blue);cursor:pointer;width:fit-content;font-size:.6875rem;font-weight:650}.library-answer[open] summary{margin-bottom:var(--space-2)}.library-pagination{justify-content:flex-end;align-items:center;gap:var(--space-2);border-top:1px solid var(--line);padding:var(--space-4);flex-wrap:wrap;display:flex}.library-pagination>span{color:var(--ink-muted);margin-right:auto;font-size:.625rem}.card-markdown{font-size:var(--text-small);overflow-wrap:anywhere;text-align:left;font-weight:400;line-height:1.8}.card-markdown>:first-child{margin-top:0}.card-markdown>:last-child{margin-bottom:0}.card-markdown p{margin-block:var(--space-2);white-space:pre-wrap}.card-markdown ul,.card-markdown ol{margin-block:var(--space-3);padding-left:22px}.card-markdown a{color:var(--blue);text-underline-offset:3px;text-decoration:underline}.card-markdown pre{text-align:left;padding:var(--space-3);background:var(--canvas);border:1px solid var(--line);overflow-x:auto}.card-markdown code{font-family:var(--font-mono);background:var(--canvas);padding:2px 4px;font-size:.9em}.card-markdown pre code{padding:0}.card-markdown table{border-collapse:collapse;display:block;overflow-x:auto}.card-markdown th,.card-markdown td{border:1px solid var(--line);padding:6px}.card-markdown blockquote{border-left:3px solid var(--blue);padding-left:var(--space-4);color:var(--ink-muted);margin-inline:0}.card-markdown img{max-width:100%;height:auto}.card-markdown h1,.card-markdown h2,.card-markdown h3{margin-block:var(--space-4) var(--space-2);font-size:1.2em}@media (width<=1100px){:root{--sidebar-width:206px}.sidebar{padding-inline:var(--space-4)}.sidebar .brand{font-size:19px}.sidebar .brand-mark{width:38px;height:40px}.stats>div{padding:16px 14px}.stat-icon,.rating kbd{display:none}.landing-hero{padding-block:var(--space-8);gap:40px}.landing-footer{margin-inline:var(--space-5)}.subject-card{padding:20px}}@media (width<=760px){.landing-nav{padding:var(--space-5) 20px}.brand{font-size:20px}.brand-mark{width:38px;height:40px}.nav-link{font-size:var(--text-small)}.landing-main{padding-inline:20px}.landing-hero{gap:var(--space-7);padding-block:var(--space-7) var(--space-8);grid-template-columns:1fr}.hero-copy h1{font-size:clamp(44px,9vw,62px)}.hero-copy>p{font-size:var(--text-body)}.sample-stack{justify-self:center;width:calc(100% - 16px);max-width:500px}.sample-card{padding:var(--space-5)}.sample-card h2{font-size:30px}.subject-heading{align-items:flex-start;gap:var(--space-3);flex-direction:column}.subject-heading h2{font-size:24px}.subject-grid{gap:var(--space-4);grid-template-columns:1fr}.subject-card{padding:var(--space-5)}.landing-footer{margin-inline:20px;font-size:.625rem}.sidebar{justify-content:space-between;align-items:center;gap:var(--space-4);border-right:0;border-bottom:var(--border);flex-direction:row;width:100%;padding:18px 20px;position:static}.sidebar .brand{gap:8px;margin:0;font-size:17px}.sidebar .brand-mark{width:32px;height:34px}.sidebar nav{gap:var(--space-2);display:flex}.button.nav-item{gap:6px;min-height:38px;margin:0;padding:10px 8px;font-size:.625rem}.nav-item svg{width:15px;height:15px}.nav-label,.nav-count,.muted-count,.sidebar-note,.workspace-footer{display:none}.workspace{min-height:calc(100dvh - 74px);margin:0}.topbar{min-height:68px;padding:14px 20px}.topbar .button{min-height:38px;padding:10px 12px;font-size:.625rem}.workspace main{padding:28px 20px var(--space-5)}.page-heading h1{font-size:30px}.page-heading>p{font-size:.6875rem}.stats>div{padding:16px 10px}.stats strong{font-size:24px}.stats small{margin:6px 0 0;font-size:.5rem;display:block}.stat-label{font-size:.5rem}.section-toolbar{gap:var(--space-3);margin-top:var(--space-5)}.section-toolbar h2{font-size:var(--text-body)}.section-toolbar .pill{display:none}.topic-filter{min-width:150px;max-width:180px;font-size:.6875rem}.card-top{padding:var(--space-4)}.card-body{padding:var(--space-5) 20px var(--space-6)}.study-question .card-markdown{font-size:24px}.card-position{font-size:.5625rem}.card-bottom{gap:var(--space-3);padding:14px}.card-bottom>span{font-size:.5625rem}.card-bottom .button{padding:10px;font-size:.625rem}.rating-buttons{gap:var(--space-2)}.button.rating{text-align:center;justify-content:center;gap:var(--space-2);flex-direction:column;padding:14px 5px}.rating>span{font-size:.625rem}.answer .card-markdown{font-size:var(--text-body)}.page-footer{margin-inline:20px}.dialog-content{width:calc(100% - 28px);padding:var(--space-5);max-height:calc(100dvh - 28px)}.dialog-title{font-size:26px}.input,.textarea{font-size:16px}.dialog-close{top:12px;right:12px}.form-field+.form-field{margin-top:20px}}@media (width<=400px){.sidebar{flex-wrap:wrap}.sidebar nav{width:100%}.button.nav-item{flex:1}.breadcrumb,.slash{display:none}.study-footer{gap:var(--space-2);flex-direction:column}.card-bottom{flex-wrap:wrap}.card-bottom .button,.library-pagination>span{width:100%}}.library-actions,.reason-form{align-items:center;gap:var(--space-3);flex-wrap:wrap;display:flex}.exercise{margin-block:var(--space-5);padding:var(--space-4);border:var(--border);background:var(--yellow-soft)}.exercise li{margin-bottom:var(--space-4)}.reason-form{padding:var(--space-4);margin-bottom:var(--space-4);background:var(--yellow-soft)}.combobox-field{min-width:0}.button.combobox-trigger{width:100%;min-height:42px;box-shadow:none;font-size:var(--text-small);text-align:left;justify-content:space-between;padding:10px 12px;font-weight:600}.combobox-trigger>span{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.combobox-trigger>svg{flex-shrink:0}.combobox-content{z-index:60;width:var(--radix-popover-trigger-width);background:var(--paper);border:var(--border);min-width:min(280px,100vw - 32px);max-width:calc(100vw - 32px);box-shadow:var(--shadow)}.combobox-search{align-items:center;gap:var(--space-2);padding:var(--space-3);border-bottom:1px solid var(--line);display:flex}.combobox-search input{width:100%;min-width:0;color:var(--ink);font:inherit;font-size:var(--text-body);background:0 0;border:none}.combobox-content [cmdk-list]{max-height:min(280px, calc(var(--radix-popover-content-available-height) - 110px));overscroll-behavior:contain;padding:var(--space-1);overflow-y:auto}.combobox-content [cmdk-item]{gap:var(--space-2);padding:var(--space-3);font-size:var(--text-small);cursor:pointer;overflow-wrap:anywhere;align-items:flex-start;display:flex}.combobox-content [cmdk-item][data-selected=true]{background:var(--blue-soft);outline:1px solid var(--blue);outline-offset:-1px}.combobox-content [cmdk-item] small{margin-top:var(--space-1);color:var(--ink-muted);display:block}.combobox-content [cmdk-empty]{padding:var(--space-4);font-size:var(--text-small)}.combobox-check{flex:0 0 16px}.combobox-footer{padding:var(--space-2) var(--space-3);border-top:1px solid var(--line);font-size:var(--text-small);justify-content:space-between;align-items:center;display:flex}.selected-options{margin:var(--space-2) 0 0;padding:0;list-style:none}.selected-options li{align-items:center;gap:var(--space-2);padding:var(--space-2) 0;border-bottom:1px solid var(--line);font-size:var(--text-small);display:flex}.selected-options li>span{overflow-wrap:anywhere;flex:1}.selected-options .button{flex-shrink:0}.dialog-content.card-editor{flex-direction:column;width:min(720px,100% - 40px);height:min(860px,100dvh - 48px);padding:0;display:flex;overflow:hidden}.card-editor .dialog-header{padding:var(--space-5) var(--space-6);border-bottom:var(--border);background:var(--paper);flex-shrink:0;margin:0}.card-editor .dialog-title{font-size:1.4rem}.card-editor .dialog-description{margin-top:var(--space-1)}.editor-form{flex-direction:column;flex:1;min-height:0;display:flex}.editor-body{overscroll-behavior:contain;padding:var(--space-5) var(--space-6);flex:1;min-height:0;overflow-y:auto}.editor-toolbar{justify-content:space-between;align-items:center;gap:var(--space-3);margin-bottom:var(--space-4);font-weight:700;font-size:var(--text-small);display:flex}.editor-body .form-field>.label{margin-bottom:var(--space-2);display:block}.editor-body .select-trigger{width:100%}.editor-body .form-field>p{font-size:var(--text-small);color:var(--ink-muted);margin-top:var(--space-2)}.editor-body .card-markdown{margin-top:var(--space-3);padding:var(--space-3);border-left:3px solid var(--blue);background:var(--blue-soft)}.editor-section-heading{border-top:1px solid var(--line);padding-top:var(--space-5);margin-top:var(--space-5);margin-bottom:var(--space-4)}.editor-section-heading h3{font-size:var(--text-body)}.editor-section-heading p{color:var(--ink-muted);font-size:var(--text-small);margin-top:var(--space-1)}.dialog-footer.editor-footer{padding:var(--space-4) var(--space-6);border-top:var(--border);background:var(--paper);flex-shrink:0;margin:0;display:block}.editor-actions{justify-content:flex-end;align-items:center;gap:var(--space-3);display:flex}.editor-save-note{color:var(--ink-muted);margin-right:auto;font-size:.6875rem}.editor-footer .field-error{margin:0 0 var(--space-3)}.stats+.review-planner{margin-top:var(--space-5)}.review-planner{border:var(--border);background:var(--paper);margin-bottom:var(--space-6);grid-template-columns:minmax(0,1.4fr) minmax(240px,1fr);display:grid}.planner-main{padding:var(--space-5);border-top:5px solid var(--blue)}.planner-heading h2{letter-spacing:-.04em;margin-top:var(--space-2);font-size:1.5rem}.planner-heading>p{margin-top:var(--space-2);font-size:var(--text-small);color:var(--ink-muted)}.planner-controls{align-items:end;gap:var(--space-4);margin-top:var(--space-5);grid-template-columns:minmax(0,1fr) auto;display:grid}.planner-field,.planner-topic{gap:var(--space-2);min-width:0;display:grid}.planner-controls>.button{min-height:42px}.planner-topic{margin-top:var(--space-4)}.planner-hint{margin-top:var(--space-3);min-height:2.8em;color:var(--ink-muted);font-size:.6875rem}.session-timer{font-size:var(--text-small);font-weight:700}.weak-summary{padding:var(--space-5);background:var(--blue-soft);border-left:1px solid var(--line);border-top:5px solid #0000}.weak-summary h3{font-size:var(--text-body);margin-block:var(--space-2) var(--space-4)}.weak-summary ul{margin:0;padding:0;list-style:none}.weak-summary li+li{border-top:1px solid var(--line)}.weak-summary .button{width:100%;height:auto;padding:var(--space-3) 0;white-space:normal;text-align:left;font-size:var(--text-small);justify-content:space-between;align-items:baseline}.weak-count{align-items:center;gap:var(--space-2);flex-shrink:0;display:flex}.weak-empty p{font-size:var(--text-small);margin-bottom:var(--space-2);font-weight:600}.weak-empty>span{max-width:34ch;color:var(--ink-muted);font-size:.6875rem;line-height:1.8;display:block}.collection-filters{align-items:center;gap:var(--space-3);min-width:0;display:flex}.collection-filters .combobox-field{width:220px}.topic-panel{border:var(--border);background:var(--paper);margin-top:var(--space-5)}.topic-panel>summary{align-items:center;gap:var(--space-3);padding:var(--space-4) var(--space-5);cursor:pointer;font-weight:750;display:flex}.topic-panel>summary:after{content:"+";margin-left:auto}.topic-panel[open]>summary:after{content:"−"}.topic-panel-count{font-size:var(--text-small);color:var(--ink-muted);font-weight:500}.topic-panel-body{border-top:1px solid var(--line);padding:var(--space-4) var(--space-5)}.topic-list-controls{gap:var(--space-3);margin-bottom:var(--space-3);grid-template-columns:1fr auto;display:grid}.topic-list{margin:0;padding:0;list-style:none}.topic-list li+li{border-top:1px solid var(--line)}.topic-list .button{gap:var(--space-3);text-align:left;white-space:normal;width:100%;padding:var(--space-3) 0;height:auto;font-size:var(--text-small);grid-template-columns:minmax(0,1fr) 90px 65px 16px;display:grid}.topic-state{background:var(--canvas);padding:var(--space-1) var(--space-2);font-size:.6875rem;font-weight:600}.topic-state[data-state=Solid]{background:var(--green)}.topic-state[data-state=Unstable]{background:var(--pink)}.topic-state[data-state=Stale]{background:var(--yellow-soft)}.topic-card-count{color:var(--ink-muted);font-size:.6875rem;font-weight:500}.mastery-legend{color:var(--ink-muted);margin-top:var(--space-4);font-size:.6875rem;line-height:1.8}.card-top{z-index:2;background:var(--paper);border-bottom:1px solid var(--line);position:sticky;top:0}.library-search .input{flex:1}.card-library .library-actions{gap:var(--space-2);flex-wrap:nowrap;width:140px}#study-heading{scroll-margin-top:var(--space-4)}@media (width<=850px){.review-planner{grid-template-columns:1fr}.weak-summary{border-left:0;border-top:1px solid var(--line)}.weak-empty>span{max-width:none}}@media (width<=600px){.dialog-content.card-editor{width:calc(100% - 24px);height:calc(100dvh - 24px);max-height:calc(100dvh - 24px)}.card-editor .dialog-header,.editor-body,.dialog-footer.editor-footer{padding:var(--space-4)}.editor-save-note{display:none}.editor-actions .button{flex:1}.planner-main,.weak-summary{padding:var(--space-4)}.planner-controls{gap:var(--space-3);grid-template-columns:1fr}.section-toolbar{align-items:stretch}.collection-filters{flex-wrap:wrap}.collection-filters .combobox-field{flex:1;min-width:180px}.library-search{flex-wrap:wrap}.library-search .input{flex-basis:100%}.topic-list-controls{grid-template-columns:1fr}.topic-list .button{grid-template-columns:minmax(0,1fr) 82px 16px}.topic-card-count{display:none}.topic-panel-body{padding:var(--space-3)}}