.ptrail{position:sticky;top:var(--topbar-h, 0px);z-index:9;padding:8px max(var(--gutter, 1rem),calc((100% - var(--page-max, 1080px)) / 2)) 6px;background:var(--teal-soft, color-mix(in srgb, var(--teal, #1f6f78) 12%, var(--paper, #fff)));border-top:1px solid var(--teal, #1f6f78);border-bottom:1px solid var(--teal, #1f6f78);margin:0 0 4px}.ptrail-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:6px 12px}.ptrail-now{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap;min-width:0}.ptrail-tag{font-size:var(--fs-75, .75rem);font-weight:700;color:var(--teal, #1f6f78);white-space:nowrap}.ptrail-title{font-size:.92rem;overflow-wrap:anywhere;color:var(--ink, #1c1c1c)}.ptrail-kind{font-size:var(--fs-75, .75rem);color:var(--ink-3, #777)}.ptrail-away{font-size:.75rem;color:var(--ochre, #b8860b)}.ptrail-actions{display:flex;gap:6px;flex-wrap:wrap;align-items:center;min-width:0}.ptrail-actions>select{flex:0 1 auto;min-width:4.5rem;max-width:100%;text-overflow:ellipsis}.ptrail-actions .btn,.ptrail-actions .chip{padding:5px 12px;white-space:nowrap}.ptrail-stop{white-space:nowrap}.ptrail-stop{font:inherit;font-size:.82rem;padding:5px 12px;cursor:pointer;border-radius:var(--radius, 4px);border:1px solid var(--ink-3, #888);background:var(--surface, #fff);color:var(--ink-2, #444)}.ptrail-stop:hover{border-color:var(--red, #b3261e);color:var(--red, #b3261e)}.ptrail-fold{flex:none;width:30px;height:30px;display:inline-grid;place-items:center;padding:0;cursor:pointer;border:1px solid var(--rule, #d6d3cc);border-radius:var(--radius, 4px);background:var(--surface, #fff);color:var(--ink-2, #444)}.ptrail-fold svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s ease}.ptrail.is-folded .ptrail-fold svg{transform:rotate(180deg)}.ptrail-grip{display:block;width:56px;height:14px;margin:2px auto -4px;padding:0;border:0;background:none;cursor:grab;touch-action:none;position:relative}.ptrail-grip:before{content:"";position:absolute;left:14px;right:14px;top:5px;height:4px;border-radius:2px;background:color-mix(in srgb,var(--teal, #1f6f78) 45%,transparent)}.ptrail-grip:hover:before,.ptrail-grip:focus-visible:before{background:var(--teal, #1f6f78)}.ptrail.is-folded{padding-top:5px;padding-bottom:2px}.ptrail.is-folded .ptrail-head{flex-wrap:nowrap}.ptrail.is-folded .ptrail-now{flex-wrap:nowrap;overflow:hidden;flex:1 1 0}.ptrail.is-folded .ptrail-title{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.ptrail.is-folded .ptrail-away,.ptrail.is-folded .ptrail-kind{display:none}.ptrail.is-folded .ptrail-actions{flex-wrap:nowrap;flex:0 1 auto}@media (max-width: 640px){.ptrail.is-folded .ptrail-tag{display:none}}@media (prefers-reduced-motion: reduce){.ptrail-fold svg{transition:none}}.ptrail-route-head{display:flex;justify-content:space-between;gap:8px;margin:4px 0 2px;font-size:var(--fs-75, .75rem);color:var(--ink-3, #777)}.ptrail-route{list-style:none;margin:0;padding:0;display:flex;gap:3px;min-width:0}.ptrail-seg{flex:1 1 0;min-width:0;--pt: var(--ink-3, #888);--pt-soft: var(--rule-soft, #ecebe6)}.ptrail-seg.tone-review{--pt: var(--red, #b3261e);--pt-soft: var(--red-soft, #f6dcd9)}.ptrail-seg.tone-read{--pt: var(--teal, #1f6f78);--pt-soft: var(--teal-soft, #d9e9ea)}.ptrail-seg.tone-drill{--pt: var(--ink, #1c1c1c);--pt-soft: var(--rule-soft, #e6e6e1)}.ptrail-seg.tone-cards{--pt: var(--ink-2, #555);--pt-soft: var(--rule-soft, #e6e6e1)}.ptrail-seg.tone-omr{--pt: var(--ochre, #b8860b);--pt-soft: var(--ochre-soft, #f3e6cc)}.ptrail-seg button{width:100%;height:28px;display:flex;align-items:center;justify-content:center;gap:5px;padding:0 6px;min-width:0;font:inherit;font-size:var(--fs-75, .75rem);line-height:1.2;cursor:pointer;text-align:left;border:0;border-top:3px solid var(--pt);border-radius:var(--radius, 3px);background:var(--pt-soft);color:var(--pt)}.ptrail-seg button:disabled{cursor:default}.ptrail-seg-no{flex:none;font-weight:700;font-variant-numeric:tabular-nums}.ptrail-seg-title{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink-2, #444)}.ptrail-seg.is-now{min-width:min(12rem,42%)}.ptrail-seg.is-now button{background:var(--pt);color:var(--paper, #fff);box-shadow:0 0 0 2px color-mix(in srgb,var(--pt) 30%,transparent)}.ptrail-seg.is-now .ptrail-seg-title{color:var(--paper, #fff);font-weight:600}.ptrail-seg.is-done button{background:var(--surface, #fff);border-top-color:var(--rule, #d6d3cc);color:var(--ink-3, #888);opacity:.8}.ptrail-seg.is-done .ptrail-seg-title{color:var(--ink-3, #888);text-decoration:line-through;text-decoration-color:var(--rule, #ccc)}.ptrail-seg.is-next button:hover,.ptrail-seg.is-done button:hover{filter:brightness(.96);outline:1px solid var(--pt)}.ptrail-seg button:focus-visible{outline:2px solid var(--teal, #1f6f78);outline-offset:1px}@media (max-width: 640px){.ptrail-seg:not(.is-now) .ptrail-seg-title{display:none}}.ptrail-note{margin:2px 0 0;font-size:.8rem;color:var(--ink-2, #555)}.ptrail-err{margin:2px 0 0;font-size:.82rem;color:var(--red, #b3261e)}@media (max-width: 640px){.ptrail-title{font-size:.86rem}}html[data-plan-focus] [data-plan-away]{display:none!important}@media print{.ptrail{display:none}}.ptrail-step-next{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:8px;max-width:var(--page-max, 1080px);margin:16px auto;padding:0 var(--gutter, 1rem)}.ptrail-step-next .ptrail-err{margin:0}.xv-list{display:grid;gap:8px;margin:10px 0 14px}.xv-card{display:flex;align-items:center;gap:12px;width:100%;text-align:left;font:inherit;color:var(--ink);background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius);padding:10px 14px;cursor:pointer}.xv-card:hover{border-color:var(--teal, var(--rule))}.xv-card:focus-visible{outline:2px solid var(--teal, var(--ink));outline-offset:2px}.xv-play{flex:none;width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--teal, var(--ink));color:var(--surface);font-size:var(--fs-80)}.xv-text{display:grid;min-width:0}.xv-text b{font-size:var(--fs-95);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.xv-open{display:grid;gap:6px}.xv-head{display:flex;align-items:center;justify-content:space-between;gap:8px}.xv-wait{aspect-ratio:16 / 9;display:flex;align-items:center;justify-content:center;border:1px solid var(--rule);border-radius:var(--radius);color:var(--rule);font-size:var(--fs-92)}.xv-list.is-compact .xv-card{padding:8px 10px}@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/cbt/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2) format("woff2"),url(/cbt/assets/KaTeX_AMS-Regular-DMm9YOAa.woff) format("woff"),url(/cbt/assets/KaTeX_AMS-Regular-DRggAlZN.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/cbt/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2) format("woff2"),url(/cbt/assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff) format("woff"),url(/cbt/assets/KaTeX_Caligraphic-Bold-ATXxdsX0.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/cbt/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2) format("woff2"),url(/cbt/assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff) format("woff"),url(/cbt/assets/KaTeX_Caligraphic-Regular-wX97UBjC.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/cbt/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2) format("woff2"),url(/cbt/assets/KaTeX_Fraktur-Bold-BsDP51OF.woff) format("woff"),url(/cbt/assets/KaTeX_Fraktur-Bold-BdnERNNW.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/cbt/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2) format("woff2"),url(/cbt/assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff) format("woff"),url(/cbt/assets/KaTeX_Fraktur-Regular-CB_wures.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/cbt/assets/KaTeX_Main-Bold-Cx986IdX.woff2) format("woff2"),url(/cbt/assets/KaTeX_Main-Bold-Jm3AIy58.woff) format("woff"),url(/cbt/assets/KaTeX_Main-Bold-waoOVXN0.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/cbt/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2) format("woff2"),url(/cbt/assets/KaTeX_Main-BoldItalic-SpSLRI95.woff) format("woff"),url(/cbt/assets/KaTeX_Main-BoldItalic-DzxPMmG6.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/cbt/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2) format("woff2"),url(/cbt/assets/KaTeX_Main-Italic-BMLOBm91.woff) format("woff"),url(/cbt/assets/KaTeX_Main-Italic-3WenGoN9.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/cbt/assets/KaTeX_Main-Regular-B22Nviop.woff2) format("woff2"),url(/cbt/assets/KaTeX_Main-Regular-Dr94JaBh.woff) format("woff"),url(/cbt/assets/KaTeX_Main-Regular-ypZvNtVU.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/cbt/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2) format("woff2"),url(/cbt/assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff) format("woff"),url(/cbt/assets/KaTeX_Math-BoldItalic-B3XSjfu4.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/cbt/assets/KaTeX_Math-Italic-t53AETM-.woff2) format("woff2"),url(/cbt/assets/KaTeX_Math-Italic-DA0__PXp.woff) format("woff"),url(/cbt/assets/KaTeX_Math-Italic-flOr_0UB.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(/cbt/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2) format("woff2"),url(/cbt/assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff) format("woff"),url(/cbt/assets/KaTeX_SansSerif-Bold-CFMepnvq.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/cbt/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2) format("woff2"),url(/cbt/assets/KaTeX_SansSerif-Italic-DN2j7dab.woff) format("woff"),url(/cbt/assets/KaTeX_SansSerif-Italic-YYjJ1zSn.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/cbt/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2) format("woff2"),url(/cbt/assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff) format("woff"),url(/cbt/assets/KaTeX_SansSerif-Regular-BNo7hRIc.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/cbt/assets/KaTeX_Script-Regular-D3wIWfF6.woff2) format("woff2"),url(/cbt/assets/KaTeX_Script-Regular-D5yQViql.woff) format("woff"),url(/cbt/assets/KaTeX_Script-Regular-C5JkGWo-.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/cbt/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2) format("woff2"),url(/cbt/assets/KaTeX_Size1-Regular-C195tn64.woff) format("woff"),url(/cbt/assets/KaTeX_Size1-Regular-Dbsnue_I.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/cbt/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2) format("woff2"),url(/cbt/assets/KaTeX_Size2-Regular-oD1tc_U0.woff) format("woff"),url(/cbt/assets/KaTeX_Size2-Regular-B7gKUWhC.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(data:font/woff2;base64,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) format("woff2"),url(/cbt/assets/KaTeX_Size3-Regular-CTq5MqoE.woff) format("woff"),url(/cbt/assets/KaTeX_Size3-Regular-DgpXs0kz.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/cbt/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2) format("woff2"),url(/cbt/assets/KaTeX_Size4-Regular-BF-4gkZK.woff) format("woff"),url(/cbt/assets/KaTeX_Size4-Regular-DWFBv043.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/cbt/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2) format("woff2"),url(/cbt/assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff) format("woff"),url(/cbt/assets/KaTeX_Typewriter-Regular-D3Ib7_Hf.ttf) format("truetype")}.katex{font: 1.21em KaTeX_Main,Times New Roman,serif;line-height:1.2;position:relative;text-indent:0;text-rendering:auto}.katex *{-ms-high-contrast-adjust:none!important;border-color:currentColor}.katex .katex-version:after{content:"0.16.47"}.katex .katex-mathml{border:0;-webkit-clip-path:inset(50%);clip-path:inset(50%);height:1px;overflow:hidden;padding:0;position:absolute;width:1px}.katex .katex-html>.newline{display:block}.katex .base{position:relative;white-space:nowrap;width:-webkit-min-content;width:-moz-min-content;width:min-content}.katex .base,.katex .strut{display:inline-block}.katex .textbf{font-weight:700}.katex .textit{font-style:italic}.katex .textrm{font-family:KaTeX_Main}.katex .textsf{font-family:KaTeX_SansSerif}.katex .texttt{font-family:KaTeX_Typewriter}.katex .mathnormal{font-family:KaTeX_Math;font-style:italic}.katex .mathit{font-family:KaTeX_Main;font-style:italic}.katex .mathrm{font-style:normal}.katex .mathbf{font-family:KaTeX_Main;font-weight:700}.katex .boldsymbol{font-family:KaTeX_Math;font-style:italic;font-weight:700}.katex .amsrm,.katex .mathbb,.katex .textbb{font-family:KaTeX_AMS}.katex .mathcal{font-family:KaTeX_Caligraphic}.katex .mathfrak,.katex .textfrak{font-family:KaTeX_Fraktur}.katex .mathboldfrak,.katex .textboldfrak{font-family:KaTeX_Fraktur;font-weight:700}.katex .mathtt{font-family:KaTeX_Typewriter}.katex .mathscr,.katex .textscr{font-family:KaTeX_Script}.katex .mathsf,.katex .textsf{font-family:KaTeX_SansSerif}.katex .mathboldsf,.katex .textboldsf{font-family:KaTeX_SansSerif;font-weight:700}.katex .mathitsf,.katex .mathsfit,.katex .textitsf{font-family:KaTeX_SansSerif;font-style:italic}.katex .mainrm{font-family:KaTeX_Main;font-style:normal}.katex .vlist-t{border-collapse:collapse;display:inline-table;table-layout:fixed}.katex .vlist-r{display:table-row}.katex .vlist{display:table-cell;position:relative;vertical-align:bottom}.katex .vlist>span{display:block;height:0;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{overflow:hidden;width:0}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{display:table-cell;font-size:1px;min-width:2px;vertical-align:bottom;width:2px}.katex .vbox{align-items:baseline;display:inline-flex;flex-direction:column}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{display:inline-flex;flex-direction:row}.katex .thinbox{max-width:0;width:0}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;display:inline-block;width:100%}.katex .hdashline,.katex .hline,.katex .mfrac .frac-line,.katex .overline .overline-line,.katex .rule,.katex .underline .underline-line{min-height:1px}.katex .mspace{display:inline-block}.katex .smash{display:inline;line-height:0}.katex .clap,.katex .llap,.katex .rlap{position:relative;width:0}.katex .clap>.inner,.katex .llap>.inner,.katex .rlap>.inner{position:absolute}.katex .clap>.fix,.katex .llap>.fix,.katex .rlap>.fix{display:inline-block}.katex .llap>.inner{right:0}.katex .clap>.inner,.katex .rlap>.inner{left:0}.katex .clap>.inner>span{margin-left:-50%;margin-right:50%}.katex .rule{border:0 solid;display:inline-block;position:relative}.katex .hline,.katex .overline .overline-line,.katex .underline .underline-line{border-bottom-style:solid;display:inline-block;width:100%}.katex .hdashline{border-bottom-style:dashed;display:inline-block;width:100%}.katex .sqrt>.root{margin-left:.2777777778em;margin-right:-.5555555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .sizing.reset-size2.size1{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .sizing.reset-size2.size3{font-size:1.1666666667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.3333333333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .sizing.reset-size2.size6{font-size:1.6666666667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .sizing.reset-size2.size10{font-size:3.4566666667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.1466666667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.7142857143em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.8571428571em}.katex .fontsize-ensurer.reset-size3.size3,.katex .sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .sizing.reset-size3.size4{font-size:1.1428571429em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.2857142857em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.4285714286em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.7142857143em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.0571428571em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.4685714286em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.9628571429em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.5542857143em}.katex .fontsize-ensurer.reset-size4.size1,.katex .sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .sizing.reset-size5.size1{font-size:.5555555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.7777777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.8888888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .sizing.reset-size5.size6{font-size:1.1111111111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.3333333333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .sizing.reset-size5.size10{font-size:2.3044444444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.7644444444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .sizing.reset-size7.size1{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .sizing.reset-size7.size3{font-size:.5833333333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .sizing.reset-size7.size6{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .sizing.reset-size7.size10{font-size:1.7283333333em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.0733333333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.4861111111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.5555555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .sizing.reset-size8.size6{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .sizing.reset-size8.size10{font-size:1.4402777778em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.7277777778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.2893518519em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.4050925926em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462962963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.5208333333em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.5787037037em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .sizing.reset-size9.size10{font-size:1.2002314815em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.4398148148em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.2410800386em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.2892960463em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512054em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.3857280617em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.4339440694em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.4821600771em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.5785920926em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.6943105111em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.8331726133em}.katex .fontsize-ensurer.reset-size10.size10,.katex .sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .sizing.reset-size10.size11{font-size:1.1996142719em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.2009646302em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.2411575563em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.2813504823em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.3215434084em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.3617363344em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.4019292605em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.4823151125em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778135em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.6945337621em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.8336012862em}.katex .fontsize-ensurer.reset-size11.size11,.katex .sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{display:inline-block;width:.12em}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .accent .accent-body{position:relative}.katex .accent .accent-body:not(.accent-full){width:0}.katex .overlay{display:block}.katex .mtable .vertical-separator{display:inline-block;min-width:1px}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;display:block;height:inherit;position:absolute;width:100%}.katex svg path{stroke:none}.katex svg{fill-rule:nonzero;fill-opacity:1;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1}.katex img{border-style:none;max-height:none;max-width:none;min-height:0;min-width:0}.katex .stretchy{display:block;overflow:hidden;position:relative;width:100%}.katex .stretchy:after,.katex .stretchy:before{content:""}.katex .hide-tail{overflow:hidden;position:relative;width:100%}.katex .halfarrow-left{left:0;overflow:hidden;position:absolute;width:50.2%}.katex .halfarrow-right{overflow:hidden;position:absolute;right:0;width:50.2%}.katex .brace-left{left:0;overflow:hidden;position:absolute;width:25.1%}.katex .brace-center{left:25%;overflow:hidden;position:absolute;width:50%}.katex .brace-right{overflow:hidden;position:absolute;right:0;width:25.1%}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{border:.04em solid;box-sizing:border-box}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{border-right:.049em solid;border-top:.049em solid;box-sizing:border-box;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{display:inline-block;position:absolute;right:calc(50% + .3em);text-align:left}.katex .cd-label-right{display:inline-block;left:calc(50% + .3em);position:absolute;text-align:right}.katex-display{display:block;margin:1em 0;text-align:center}.katex-display>.katex{display:block;text-align:center;white-space:nowrap}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.tag{left:0;right:auto}.katex-display.fleqn>.katex{padding-left:2em;text-align:left}body{counter-reset:katexEqnNo mmlEqnNo}.ex-cite{font-size:.7em;line-height:0;margin-left:2px;white-space:nowrap;vertical-align:super}.ex-tag{font:inherit;font-variant-numeric:tabular-nums;color:var(--ex-accent, var(--red, #17518f));background:none;border:0;padding:0 1px}button.ex-tag{cursor:pointer;text-decoration:underline dotted;text-underline-offset:.25em}button.ex-tag:hover{text-decoration-style:solid}.ex-tag+.ex-tag:before{content:"·";color:var(--ink-3, #8a8a8a);margin-right:2px;display:inline-block}.ex-tag:focus-visible{outline:2px solid var(--ex-accent, var(--red, #17518f));outline-offset:1px;border-radius:2px}.ex-more{color:var(--ink-2, #5b5b5b)}.ex-panel-back{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;background:#00000059;display:flex;align-items:flex-end;justify-content:center}.ex-panel{background:var(--surface, #fff);color:var(--ink, #1b1b1b);width:min(40rem,100%);max-height:85vh;overflow:auto;border-radius:12px 12px 0 0;padding:16px 18px calc(16px + env(safe-area-inset-bottom,0px));box-shadow:0 16px 48px #00000040;font-size:15px;line-height:1.6;outline:none;display:flex;flex-direction:column;gap:10px}@media (min-width: 48rem){.ex-panel-back{align-items:center;padding:16px}.ex-panel{border-radius:12px}}.ex-panel-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px}.ex-panel-close{border:0;background:none;color:var(--ex-accent, var(--teal, #17518f));cursor:pointer;font:inherit;padding:4px}.ex-panel-tabs{display:flex;flex-wrap:wrap;gap:6px}.ex-panel-tabs button{font:inherit;font-size:.85rem;padding:2px 10px;border-radius:999px;border:1px solid var(--rule, #c9d3df);background:none;cursor:pointer;color:var(--ink, #1b1b1b)}.ex-panel-tabs button.on{border-color:var(--ink, #1b1b1b);font-weight:600}.ex-panel-passage summary{cursor:pointer;color:var(--ink-2, #5b5b5b);font-size:.9rem}.ex-panel-passage p,.ex-panel-box,.ex-panel-fig p{white-space:pre-wrap;margin:0}.ex-panel-passage p{margin-top:6px;font-size:.92rem}.ex-panel-stem{margin:0;white-space:pre-wrap;font-weight:600}.ex-panel-box,.ex-panel-fig{border:1px solid var(--rule, #c9d3df);border-radius:6px;padding:8px 10px;font-size:.92rem;margin:0}.ex-panel-fig figcaption{font-size:.8rem;color:var(--ink-2, #5b5b5b);margin-bottom:4px}.ex-panel-opts{list-style:none;margin:0;padding:0;display:grid;gap:6px}.ex-panel-opts li{display:flex;gap:8px;padding:6px 8px;border-radius:8px;white-space:pre-wrap}.ex-panel-opts li.is-cited{background:var(--teal-soft, #eef3fa);box-shadow:inset 3px 0 0 var(--teal, #17518f)}.ex-panel-no{flex:none;font-weight:600}.ex-panel-note{margin:0;font-size:.85rem;color:var(--ink-2, #5b5b5b)}.ex-panel-acts{display:flex;flex-wrap:wrap;gap:8px;justify-content:flex-end}.ex-panel img{max-width:100%}:root[data-theme=dark] .ex-panel{background:var(--surface, #1f1f1f);color:var(--ink, #eee)}:root[data-theme=dark] .ex-panel-note,:root[data-theme=dark] .ex-panel-fig figcaption{color:var(--ink-2, #aaa)}:root[data-theme=dark] .ex-panel-opts li.is-cited{background:var(--teal-soft, #22334a)}.gichul-spots-head{font-family:var(--f-display, inherit);font-size:1rem;font-weight:700;margin:0 0 8px}.gichul-spots-head small{font-family:var(--f-body, inherit);font-weight:400;font-size:.78rem;color:var(--ink-3, #7c8a91)}.gichul-spots-empty{color:var(--ink-3, #7c8a91);font-size:.85rem}.gichul-spots{list-style:none;padding:0;margin:0 0 8px;display:grid;gap:8px}.gichul-spots li{padding:6px 0;border-bottom:1px solid var(--rule-soft, #e2e9e5);display:grid;gap:4px}.gichul-snip{border:0;background:none;padding:0;cursor:pointer;font:inherit;text-align:left;font-size:.86rem;line-height:1.55;color:var(--teal, #1f5361);overflow-wrap:anywhere}.gichul-snip:hover{text-decoration:underline}.gichul-tags{display:flex;flex-wrap:wrap;gap:4px}.gichul-tags .ex-tag{font-size:.78rem}.ex-cite.ex-flash{outline:2px solid var(--teal, #1f5361);outline-offset:2px;border-radius:3px;transition:outline-color .3s}.rp{--rp-rail: 2.4rem;--rp-gap: 1rem;--rp-ease: cubic-bezier(.22, .8, .24, 1);--rp-dur: .26s;min-width:0}.rp.is-wide{display:flex;align-items:stretch;gap:var(--rp-gap)}.rp.is-narrow{display:flex;flex-direction:column;gap:var(--rp-gap)}.rp-main{flex:1 1 0;min-width:0}.rp-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.rp.is-wide .rp-left{position:relative;flex:0 0 auto;width:var(--rp-lw, 272px);transition:width var(--rp-dur) var(--rp-ease)}.rp.is-wide[data-left=closed] .rp-left,.rp.is-wide[data-left=drawer] .rp-left{width:var(--rp-rail)}.rp.is-dragging .rp-left{transition:none}.rp.is-dragging,.rp.is-dragging *{cursor:col-resize!important;-webkit-user-select:none;user-select:none}.rp-left-inner{position:sticky;top:var(--rp-top, 3.5rem);height:calc(100dvh - var(--rp-top, 3.5rem) - 1.25rem);overflow:hidden;overflow:clip}.rp-panel{position:absolute;inset:0 auto 0 0;width:var(--rp-lw, 272px);display:flex;flex-direction:column;background:var(--surface, #fff);border:1px solid var(--rule-soft, #e6e2d8);border-radius:3px;transition:opacity .2s ease,transform var(--rp-dur) var(--rp-ease),visibility 0s}.rp[data-left=closed] .rp-panel{opacity:0;transform:translate(-14px);visibility:hidden;pointer-events:none;transition:opacity .14s ease,transform var(--rp-dur) var(--rp-ease),visibility 0s linear var(--rp-dur)}.rp-rail,.rp-right-toggle{display:flex;flex-direction:column;align-items:center;gap:.55rem;width:var(--rp-rail);padding:.6rem 0;border:1px solid var(--rule-soft, #e6e2d8);border-radius:3px;background:var(--surface, #fff);color:var(--ink-2, #555);cursor:pointer;font-size:.78rem;line-height:1}.rp-rail{position:absolute;inset:0 auto auto 0;opacity:0;visibility:hidden;transition:opacity .2s ease 80ms,visibility 0s}.rp[data-left=closed] .rp-rail,.rp[data-left=drawer] .rp-rail{opacity:1;visibility:visible}.rp[data-left=open] .rp-rail{transition:opacity 80ms ease,visibility 0s linear 80ms}.rp-rail:hover,.rp-right-toggle:hover{color:var(--ink, #222);border-color:var(--rule, #d8d2c4)}.rp-rail:focus-visible,.rp-right-toggle:focus-visible,.rp-toggle:focus-visible,.rp-toc-item:focus-visible,.rp-resize:focus-visible{outline:2px solid var(--teal, #2a7f7a);outline-offset:1px}.rp-rail-label{writing-mode:vertical-rl;letter-spacing:.12em;white-space:nowrap}.rp-icon{flex:none}.rp-head{display:flex;align-items:center;gap:.4rem;padding:.5rem .45rem .45rem .8rem;border-bottom:1px solid var(--rule-soft, #e6e2d8)}.rp-title{flex:1;min-width:0;font-size:.8rem;letter-spacing:.08em;color:var(--ink-3, #888)}.rp-toggle{display:inline-flex;align-items:center;justify-content:center;width:1.9rem;height:1.9rem;border:none;border-radius:3px;background:transparent;color:var(--ink-2, #555);cursor:pointer}.rp-toggle:hover{background:var(--paper, #f7f5ef);color:var(--ink, #222)}.rp-scroll{flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:.35rem .35rem .8rem;scrollbar-width:thin}.rp-resize{position:absolute;top:0;bottom:0;right:calc(-.5 * var(--rp-gap) - 4px);width:9px;z-index:2;cursor:col-resize;touch-action:none;border-radius:4px}.rp-resize:after{content:"";position:absolute;top:0;bottom:0;left:4px;width:1px;background:transparent;transition:background .15s ease,box-shadow .15s ease}.rp-resize:hover:after,.rp.is-dragging .rp-resize:after,.rp-resize:focus-visible:after{background:var(--teal, #2a7f7a);box-shadow:0 0 0 1px var(--teal, #2a7f7a)}.rp-toc{font-size:.86rem;line-height:1.45}.rp-toc-heading{padding:.35rem .5rem .5rem;font-weight:600;color:var(--ink, #222);font-size:.88rem}.rp-toc-group{margin:0 0 .25rem}.rp-toc-chapter{display:flex;align-items:baseline;gap:.4rem;list-style:none;cursor:pointer;padding:.4rem .5rem;border-radius:3px;font-weight:600;font-size:.82rem;color:var(--ink-2, #555)}.rp-toc-chapter::-webkit-details-marker{display:none}.rp-toc-chapter:before{content:"";flex:none;width:.38rem;height:.38rem;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(-45deg) translateY(-.05rem);transition:transform .18s var(--rp-ease, ease)}.rp-toc-group[open]>.rp-toc-chapter:before{transform:rotate(45deg) translateY(-.15rem)}.rp-toc-chapter>span:first-child{flex:1;min-width:0}.rp-toc-chapter:hover{background:var(--paper, #f7f5ef)}.rp-toc-group[data-here]>.rp-toc-chapter{color:var(--ink, #222)}.rp-toc-count{font-size:var(--fs-75, .75rem);font-weight:400;color:var(--ink-3, #888);font-variant-numeric:tabular-nums}.rp-toc-list{list-style:none;margin:0;padding:0 0 .2rem}.rp-toc-item{position:relative;display:flex;align-items:baseline;gap:.35rem;width:100%;text-align:left;padding:.32rem .5rem .32rem .4rem;border:none;border-radius:3px;background:transparent;color:var(--ink-2, #555);cursor:pointer;font:inherit;transition:background .15s ease,color .15s ease}.rp-toc-item:hover{background:var(--paper, #f7f5ef);color:var(--ink, #222)}.rp-toc-item[aria-current=page]{background:var(--teal-soft, #e3f1ef);color:var(--ink, #222);font-weight:600;cursor:default}.rp-toc-item[aria-current=page]:before{content:"";position:absolute;left:0;top:.3rem;bottom:.3rem;width:3px;border-radius:2px;background:var(--teal, #2a7f7a)}.rp-toc-mark{flex:none;width:.9rem;font-size:var(--fs-75, .75rem);text-align:center;color:var(--teal, #2a7f7a)}.rp-toc-item[data-state=read] .rp-toc-mark{color:var(--ink-3, #888)}.rp-toc-title{flex:1;min-width:0;overflow-wrap:anywhere;word-break:keep-all}.rp-toc-meta{flex:none;font-size:var(--fs-75, .75rem);color:var(--ink-3, #888);font-weight:400}.rp.is-wide .rp-right{position:relative;flex:0 0 auto;width:var(--rp-rw, 19rem);display:flex;flex-direction:column;gap:.4rem;transition:width var(--rp-dur) var(--rp-ease)}.rp.is-wide[data-right=closed] .rp-right{width:var(--rp-rail)}.rp-right-toggle{flex:none;flex-direction:row;align-self:flex-end;width:auto;padding:.35rem .55rem;gap:.4rem;border-color:transparent;background:transparent}.rp-right-toggle .rp-rail-label{writing-mode:horizontal-tb;letter-spacing:.04em}.rp.is-wide[data-right=closed] .rp-right-toggle{position:sticky;top:var(--rp-top, 3.5rem);align-self:stretch;flex-direction:column;width:var(--rp-rail);padding:.6rem 0;border-color:var(--rule-soft, #e6e2d8);background:var(--surface, #fff)}.rp.is-wide[data-right=closed] .rp-right-toggle .rp-rail-label{writing-mode:vertical-rl;letter-spacing:.12em}.rp.is-wide .rp-right-body{flex:1 0 auto;width:var(--rp-rw, 19rem);display:grid;align-items:start;transition:opacity .2s ease,transform var(--rp-dur) var(--rp-ease),visibility 0s}.rp.is-wide .rp-right-body>*{min-width:0}.rp.is-wide[data-right=closed] .rp-right-body{position:absolute;top:0;left:0;opacity:0;transform:translate(14px);visibility:hidden;pointer-events:none;transition:opacity .14s ease,transform var(--rp-dur) var(--rp-ease),visibility 0s linear var(--rp-dur)}.rp.is-wide .rp-right{overflow-x:clip}.rp.is-narrow .rp-left{display:flex}.rp-drawer-open{display:inline-flex;align-items:center;gap:.35rem}.rp-drawer-root{position:fixed;top:0;right:0;bottom:0;left:0;z-index:70}.rp-scrim{position:absolute;top:0;right:0;bottom:0;left:0;background:#14141452;animation:rp-fade .2s ease both}.rp-drawer{position:absolute;top:0;bottom:0;left:0;width:min(20rem,86vw);display:flex;flex-direction:column;background:var(--surface, #fff);padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom);padding-left:env(safe-area-inset-left);box-shadow:0 0 32px #0000002e;animation:rp-slide .24s var(--rp-ease, ease) both}.rp-drawer-root[data-state=closing] .rp-scrim{animation:rp-fade .2s ease reverse both}.rp-drawer-root[data-state=closing] .rp-drawer{animation:rp-slide .2s ease-in reverse both}@keyframes rp-fade{0%{opacity:0}to{opacity:1}}@keyframes rp-slide{0%{transform:translate(-100%)}to{transform:translate(0)}}@media (prefers-reduced-motion: reduce){.rp-left,.rp-right,.rp-panel,.rp-rail,.rp-right-body,.rp-resize:after,.rp-toc-item,.rp-toc-chapter:before{transition:none!important}.rp-scrim,.rp-drawer{animation:none!important}}.rp>.rp-main>.reader-main{background:var(--surface, #fff);border:1px solid var(--rule, #cbd6d6);padding:1.25rem 1.4rem}.rp .rp-right-body>*{background:var(--surface, #fff);border:1px solid var(--rule, #cbd6d6);padding:1.25rem 1.4rem}.rp>.rp-main>.reader-main>h1,.rp>.rp-main>.reader-main>header h1{font-family:var(--f-display, serif);font-weight:700;font-size:1.45rem;line-height:1.4;margin:.35rem 0 .25rem;text-wrap:balance}@media (max-width: 640px){.rp>.rp-main>.reader-main>h1,.rp>.rp-main>.reader-main>header h1{font-size:1.28rem}}.lib-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.library h1{margin:.2rem 0 .4rem}.crumbs{display:flex;gap:6px;flex-wrap:wrap;align-items:baseline;font-size:var(--fs-86);color:var(--ink-3);margin-bottom:6px}.crumbs .link{font-size:inherit}.resume-card{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin:12px 0}.resume-title{font-weight:700;overflow-wrap:anywhere}.shelf{list-style:none;padding:0;margin:12px 0;display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,260px),1fr));gap:12px}.book-card{background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius, 2px);padding:14px 16px;display:flex;flex-direction:column;gap:4px;min-width:0}.book-card h2{font-size:1.1rem;margin:0}.book-card p{margin:0}.book-card .row{margin-top:6px}.book-title{font:inherit;font-family:var(--f-display);font-weight:700;color:var(--ink);overflow-wrap:anywhere;text-align:left}.toc-tools{display:flex;gap:10px;flex-wrap:wrap;align-items:center;justify-content:space-between;margin-bottom:10px}.toc-tools p{margin:0}.toc-search{font:inherit;padding:6px 9px;border:1px solid var(--rule);border-radius:var(--radius, 2px);background:var(--surface);color:var(--ink);width:min(100%,16rem)}.toc-list{list-style:none;padding:0;margin:0;display:grid;gap:4px}.toc-item{width:100%;text-align:left;display:grid;grid-template-columns:2em minmax(0,1fr);gap:8px;align-items:center;border:1px solid var(--rule-soft);background:var(--surface);border-radius:var(--radius, 2px);padding:8px 10px}.toc-item:hover,.toc-item:focus-visible{border-color:var(--teal)}.toc-no{color:var(--ink-3);font-size:var(--fs-86);font-variant-numeric:tabular-nums}.toc-title{overflow-wrap:anywhere}.book-reader .rp{--rp-rw: 18rem;--rp-top: 8rem;--rp-gap: 20px}@media (min-width: 62rem){.book-reader .rp{--rp-gap: 24px}.reader-notes{position:sticky;top:8rem;align-self:start;max-height:calc(100dvh - 9rem);overflow-y:auto}}.reader-main,.reader-notes{min-width:0}.reader-head h1{margin:6px 0 4px;overflow-wrap:anywhere}.reader-body{overflow-wrap:anywhere;margin-top:.6rem}.study-body{font-size:var(--fs-100);line-height:1.85}.study-body h2{font-size:1.2rem;margin:1.4em 0 .4em}.study-body h3{font-size:var(--fs-105);margin:1.2em 0 .3em}.study-body ul,.study-body ol{padding-left:1.3em}.study-body strong{font-weight:700}.em-mark{background:linear-gradient(transparent 58%,color-mix(in srgb,var(--ochre) 32%,transparent) 58%);color:inherit;padding:0 1px}.em-u{text-decoration:underline;text-decoration-color:var(--red);text-decoration-thickness:2px;text-underline-offset:3px;font-weight:600}.pager{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:24px}.pager .btn{max-width:100%;white-space:normal;overflow-wrap:anywhere;text-align:left}.ex-panel-stem .markdown p,.ex-panel-opts .markdown p{margin:0}.ex-panel-opts .markdown{min-width:0}.skel-line{height:.9em;margin:.55em 0;background:var(--rule-soft);border-radius:var(--radius, 2px);animation:cbt-skel 1.4s ease-in-out infinite}.skel-gap{height:.9em}@keyframes cbt-skel{50%{opacity:.5}}@media (prefers-reduced-motion: reduce){.skel-line{animation:none}}.slim-toggle{display:inline-flex;align-items:center;gap:.4rem;font-size:var(--fs-86);white-space:nowrap}.slim-side{background:none;border:0;padding:.25rem .1rem;font:inherit;color:var(--ink-3);cursor:pointer}.slim-side.is-on{color:var(--ink);font-weight:600}.slim-ratio{font-weight:400;color:var(--ink-3)}.slim-switch{position:relative;width:2.6rem;height:1.45rem;border-radius:999px;border:1px solid var(--rule);background:var(--surface);padding:0;cursor:pointer;flex:none}.slim-switch.is-on{background:var(--teal);border-color:var(--teal)}.slim-knob{position:absolute;top:50%;left:.15rem;width:1.05rem;height:1.05rem;border-radius:50%;background:var(--ink-3);transform:translateY(-50%);transition:left .15s ease,background .15s ease}.slim-switch.is-on .slim-knob{left:calc(100% - 1.2rem);background:var(--paper)}.slim-switch:focus-visible,.slim-side:focus-visible{outline:2px solid var(--teal);outline-offset:2px}.slim-note{margin:.4rem 0 .8rem;font-size:var(--fs-86);color:var(--ink-3)}.slim-default-pick{display:inline-flex;border:1px solid var(--rule);border-radius:var(--radius);overflow:hidden}.slim-default-pick button{min-height:40px;padding:0 .9rem;border:0;border-left:1px solid var(--rule);border-radius:0;background:transparent;color:var(--ink-2);font:inherit;font-size:var(--fs-92);cursor:pointer}.slim-default-pick button:first-child{border-left:0}.slim-default-pick button[aria-pressed=true]{background:var(--ink);color:var(--paper)}.slim-default .slim-note{margin-top:.5rem}@media (prefers-reduced-motion: reduce){.slim-knob{transition:none}}.pulpul-logo{flex:none;display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:8px}.pulpul-logo img{display:block;width:32px;height:32px;border-radius:8px}.pulpul-logo:focus-visible{outline:2px solid var(--teal);outline-offset:2px}@media (pointer: coarse){a.pulpul-logo{width:44px;height:44px;margin:-6px}}.plan-route-block{display:flex;gap:inherit;flex-shrink:1;flex-basis:0;min-width:0;margin-inline:3px;padding-bottom:3px;border-bottom:2px solid var(--teal)}.plan-route-block:first-child{margin-left:0}.plan-route-block:last-child{margin-right:0}.plan-route-block:not(:last-child)>.plan-route-seg:last-child{clip-path:none;padding-right:0}.plan-block{--plan-node-c: 1.125rem;--plan-block-pad: .75rem;--plan-block-gap: 1rem;position:relative;list-style:none;margin-block:var(--plan-block-gap);border:1px solid var(--rule);border-radius:var(--radius);background:var(--surface)}.plan-block:first-child{margin-top:0}.plan-block-head{display:grid;grid-template-columns:minmax(0,1fr) auto;column-gap:.75rem;row-gap:.1rem;align-items:baseline;padding:.6rem var(--plan-block-pad);background:var(--teal-soft);border-bottom:1px solid var(--rule);border-radius:var(--radius) var(--radius) 0 0}.plan-block-n{font-size:var(--fs-75);font-weight:700;letter-spacing:.04em;color:var(--teal)}.plan-block-meta{font-size:var(--fs-75);color:var(--ink-2);white-space:nowrap;font-variant-numeric:tabular-nums}.plan-block-head strong{grid-column:1 / -1;font-size:var(--fs-100);overflow-wrap:anywhere}.plan-block-head p{grid-column:1 / -1;margin:0;font-size:var(--fs-80);color:var(--ink-2);line-height:1.5}.plan-block-steps{list-style:none;margin:0;padding:.85rem var(--plan-block-pad) .25rem}.plan-block .plan-block-steps>:last-child:before{display:none}.plan-block:after,.plan-road-stop+.plan-block:before,.road-stop+.plan-block:before{content:"";position:absolute;left:calc(var(--plan-block-pad) + var(--plan-node-c) - 1px);width:2px;height:var(--plan-block-gap);background:var(--rule)}.plan-block:after{top:100%}.plan-road-stop+.plan-block:before,.road-stop+.plan-block:before{bottom:100%}.plan-road-stop+.plan-block:before,.road-stop+.plan-block:before,.plan-block:has(+.plan-road-stop):after,.plan-block:has(+.road-stop):after{left:calc(var(--plan-node-c) - 2px)}.plan-block:last-child:after{display:none}select.plan-mode-select{width:auto;max-width:100%;margin:0;padding:.25rem .4rem;font:inherit;font-size:var(--fs-86, .86rem);cursor:pointer;border:1px solid var(--rule);border-radius:var(--radius, 2px);background:var(--surface);color:var(--ink)}.plan-home{display:grid;gap:0;min-width:0}.plan-home h2,.plan-home h3{margin:0 0 4px}.plan-head{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;align-items:flex-start}.plan-head>div:first-child{min-width:0}.plan-head h2{margin:0 0 4px}.plan-toggle-wrap{align-self:center;display:inline-flex;flex-direction:column;gap:4px}.btn.plan-toggle[aria-pressed=true]{border-color:var(--teal);color:var(--teal);background:var(--teal-soft)}.plan-head-actions{display:flex;gap:6px;flex-wrap:wrap}.plan-head-actions .btn[aria-pressed=true]{border-color:var(--teal);color:var(--teal);background:var(--teal-soft)}.plan-dday{margin:2px 0 0}.plan-dday-big{font-family:var(--f-display);font-size:2rem;font-weight:800;color:var(--red);line-height:1.1}.plan-subjects{margin:4px 0 0;overflow-wrap:anywhere}.plan-warn{margin:0 0 12px;padding:8px 12px;border-radius:var(--radius, 2px);background:var(--red-soft);color:var(--ink);font-size:var(--fs-86)}.plan-note{font-size:var(--fs-80);color:var(--ink-3);margin:10px 0 0}.plan-active{margin:6px 0 10px;padding:6px 10px;border-radius:var(--radius, 2px);background:var(--teal-soft);font-size:var(--fs-86);overflow-wrap:anywhere}.plan-status-head{display:flex;align-items:center;gap:8px}.plan-status-head h3{margin:0 0 4px}.plan-status-head .tag,.plan-home .tag{font-size:var(--fs-75);padding:1px 7px;border-radius:999px;border:1px solid var(--ochre);color:var(--ochre);background:var(--ochre-soft)}.plan-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:8px;margin:8px 0 12px}.plan-stats>div{min-width:0;border:1px solid var(--rule-soft);border-radius:var(--radius, 2px);padding:8px 10px}.plan-stats dt{font-size:var(--fs-75);color:var(--ink-3)}.plan-stats dd{margin:2px 0 0;font-weight:600;font-variant-numeric:tabular-nums}.plan-stats small{color:var(--ink-3);font-size:var(--fs-75)}.plan-status{padding:1px 8px;border:1px solid currentColor;border-radius:999px;font-size:var(--fs-80)}.plan-status-ok{color:var(--teal)}.plan-status-tight{color:var(--ochre)}.plan-status-short{color:var(--red)}.plan-status-unknown{color:var(--ink-3)}.plan-meter{margin-top:10px}.plan-meter-top{display:flex;justify-content:space-between;align-items:baseline;font-size:var(--fs-86);gap:8px}.plan-meter-top strong{font-variant-numeric:tabular-nums}.plan-bar{position:relative;height:10px;border-radius:999px;background:var(--rule-soft);overflow:hidden;margin-top:4px}.plan-bar i{position:absolute;inset:0 auto 0 0;background:var(--teal);border-radius:999px}.plan-meter-foot{font-size:var(--fs-75);color:var(--ink-3);margin-top:2px}.plan-next-head{display:flex;align-items:center;gap:8px 12px;flex-wrap:wrap}.plan-tone-review,.plan-tone-wrong{--tone: var(--red);--tone-soft: var(--red-soft)}.plan-tone-read{--tone: var(--teal);--tone-soft: var(--teal-soft)}.plan-tone-drill,.plan-tone-diagnose{--tone: var(--ink);--tone-soft: var(--rule-soft)}.plan-tone-cards{--tone: var(--ink-2);--tone-soft: var(--rule-soft)}.plan-tone-omr{--tone: var(--ochre);--tone-soft: var(--ochre-soft)}.plan-roadmap{display:grid;gap:14px;margin-top:10px;min-width:0}.plan-route-head{display:flex;justify-content:space-between;font-size:var(--fs-75);color:var(--ink-3);margin-bottom:4px}.plan-route-bar{display:flex;gap:3px;height:26px}.plan-route-seg{flex:1 1 0;min-width:22px;display:grid;place-items:center;border-radius:var(--radius, 2px);background:var(--tone-soft);border-top:3px solid var(--tone);color:var(--tone);font-size:var(--fs-75);font-variant-numeric:tabular-nums}.plan-route-seg.is-now{background:var(--tone);color:var(--surface)}.plan-road{list-style:none;margin:0;padding:0}.plan-road-stop{position:relative;display:grid;grid-template-columns:34px minmax(0,1fr);gap:12px}.plan-road-stop:not(.plan-road-end):before{content:"";position:absolute;left:16px;top:34px;bottom:0;width:2px;background:var(--rule)}.plan-road-node{position:relative;z-index:1;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;border:2px solid var(--tone);background:var(--surface);color:var(--tone);font-weight:700;font-variant-numeric:tabular-nums}.plan-road-stop.is-now .plan-road-node{background:var(--tone);color:var(--surface);box-shadow:0 0 0 4px var(--tone-soft)}.plan-road-card{min-width:0;padding:4px 0 18px}.plan-road-card strong{display:block;margin-top:4px;overflow-wrap:anywhere}.plan-road-card p{margin:2px 0 0;font-size:var(--fs-86);color:var(--ink-2)}.plan-road-stop:not(.is-now) .plan-road-card p{color:var(--ink-3);font-size:var(--fs-80)}.plan-road-stop.is-now .plan-road-card{padding:10px 12px;margin-bottom:18px;border:1.5px solid var(--tone);border-radius:var(--radius, 2px);background:var(--tone-soft)}.plan-road-top{display:flex;align-items:center;gap:6px;flex-wrap:wrap}.plan-road-now{font-size:var(--fs-75);padding:1px 6px;border-radius:var(--radius, 2px);background:var(--tone);color:var(--surface)}.plan-kind{font-size:var(--fs-75);padding:1px 7px;border-radius:999px;border:1px solid var(--tone);color:var(--tone);background:var(--surface);white-space:nowrap}.plan-road-time{margin-left:auto;font-size:var(--fs-75);color:var(--ink-2);white-space:nowrap;font-variant-numeric:tabular-nums}.plan-road-time small{color:var(--ink-3)}.plan-road-actions{display:flex;align-items:center;gap:12px;margin-top:8px}.plan-road-end .plan-road-node{border:2px dashed var(--rule);color:var(--ink-3)}.plan-road-end .plan-road-card{padding-bottom:0}.plan-road-end .plan-road-card strong{color:var(--ink-2);font-size:var(--fs-92)}.plan-skip{border:0;background:none;padding:0;font-size:var(--fs-80);color:var(--ink-3);text-decoration:underline;cursor:pointer}.plan-skip:hover{color:var(--red)}@media (max-width: 480px){.plan-road-time{margin-left:0;flex-basis:100%}}.plan-home>*,.plan-roadmap>*,.plan-route{min-width:0}.plan-route-seg{min-width:0;overflow:hidden}.plan-block{--plan-node-c: 17px}.plan-head-right{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}.plan-head-right .plan-dday-big{font-size:1.5rem}.plan-setup{display:grid;gap:12px}.plan-setup h2{margin:0}.plan-field{display:grid;gap:4px;font-size:var(--fs-92);min-width:0}.plan-field select,.plan-field input[type=date]{font:inherit;padding:6px 8px;border:1px solid var(--rule);border-radius:var(--radius, 2px);background:var(--surface);color:var(--ink);max-width:100%;justify-self:start;min-height:44px}.plan-status-card{margin:0 0 16px}.plan-status-head{flex-wrap:wrap}.plan-status-head .btn{margin-left:auto}.plan-home{margin:0 0 16px}@font-face{font-family:Pretendard Variable;font-style:normal;font-weight:45 920;font-display:swap;src:url(/cbt/assets/pretendard-variable-CJuje-Rk.woff2) format("woff2")}:root{--paper: #f5f7f3;--surface: #ffffff;--ink: #1b1f22;--ink-2: #4e5a61;--ink-3: #66737a;--rule: #cbd6d6;--rule-soft: #e2e9e5;--red: #b03a2b;--red-soft: #f3e2de;--teal: #1f5361;--teal-soft: #e0ebec;--ochre: #83601e;--ochre-soft: #f2e9d6;--caution: #b37a22;--on-teal: #f5f7f3;--chat-ink-deep: #163e49;--chat-fab-ground: #e3ecd2;--cst-sky-1: #1b2346;--cst-sky-2: #0a0e1e;--cst-edge: #c3cbe6;--cst-hot: #ffd27a;--cst-path: #ffcf5c;--cst-label: #e8ebf6;--cst-area: #9aa5c8;--cst-alert: #ff7a6b;--heat-none: #e4e9e6;--heat-read: #bfd3e0;--heat-weak: #e0907f;--heat-mid: #ecc77a;--heat-good: #a6cf93;--heat-best: #4f9a62;--heat-ink: var(--ink);--imp-1: var(--heat-none);--imp-2: #cfd9ea;--imp-3: #94a9d6;--imp-4: #5a74b8;--imp-4-ink: #ffffff;--hl-key: rgba(240, 196, 40, .38);--hl-memorize: rgba(76, 175, 110, .3);--hl-unsure: rgba(226, 92, 92, .28);--hl-ref: rgba(74, 144, 226, .26);--ul-key: #c99a00;--ul-memorize: #2f8a52;--ul-unsure: #c0392b;--ul-ref: #2f6fb8;--hl-active: rgba(31, 83, 97, .22);--shadow-sheet: 0 0 0 1px #cbd6d6, 0 3px 12px #00000008;--shadow-chat: 0 18px 50px -18px rgba(18, 44, 52, .45), 0 2px 8px rgba(18, 44, 52, .12);--f-display: "Pretendard Variable", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;--f-body: "Pretendard Variable", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;--f-mono: "Pretendard Variable", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;--f-code: ui-monospace, "SF Mono", Menlo, Consolas, monospace;--space-1: .3rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.25rem;--space-6: 1.75rem;--radius: 2px;--radius-none: 0;--radius-sharp: 2px;--radius-pill: 999px;--radius-round: 50%;--radius-chat: 18px;--border-hairline: 1px;--border-accent: 2px;--border-band: 3px;--border-masthead: 2.5px;--fs-75: .75rem;--fs-80: .8rem;--fs-86: .86rem;--fs-92: .92rem;--fs-95: .95rem;--fs-100: 1rem;--fs-105: 1.05rem;--fs-115: 1.15rem;--fs-135: 1.35rem;--fs-150: 1.5rem;--fs-220: 2.2rem;--fs-325: 3.25rem;--touch-min: 44px;color-scheme:light}@media (prefers-color-scheme: dark){:root:not([data-theme=light]){--paper: #14181a;--surface: #1b2124;--ink: #e6eae5;--ink-2: #a8b5ba;--ink-3: #8a979d;--rule: #313c41;--rule-soft: #262f33;--red: #e1806d;--red-soft: #35211d;--teal: #7fbcc9;--teal-soft: #17282c;--ochre: #d3ab62;--ochre-soft: #2c2617;--caution: #c98a2b;--on-teal: #0f1a1d;--chat-ink-deep: #3f8797;--heat-none: #2a3236;--heat-read: #34505f;--heat-weak: #a8503f;--heat-mid: #9a7a2c;--heat-good: #4c7a43;--heat-best: #2f7d49;--imp-2: #2f3d5a;--imp-3: #3e5788;--imp-4: #5a7bc8;--hl-key: rgba(240, 196, 40, .3);--hl-memorize: rgba(90, 200, 130, .26);--hl-unsure: rgba(240, 110, 110, .28);--hl-ref: rgba(110, 170, 240, .28);--ul-key: #e6bd3c;--ul-memorize: #5cc685;--ul-unsure: #f08a7c;--ul-ref: #7fb0ea;--hl-active: rgba(127, 188, 201, .25);--shadow-sheet: 0 0 0 1px #313c41, 0 3px 12px #00000008;--shadow-chat: 0 18px 50px -12px rgba(0, 0, 0, .7), 0 2px 8px rgba(0, 0, 0, .4);color-scheme:dark}}:root[data-theme=dark]{--paper: #14181a;--surface: #1b2124;--ink: #e6eae5;--ink-2: #a8b5ba;--ink-3: #8a979d;--rule: #313c41;--rule-soft: #262f33;--red: #e1806d;--red-soft: #35211d;--teal: #7fbcc9;--teal-soft: #17282c;--ochre: #d3ab62;--ochre-soft: #2c2617;--caution: #c98a2b;--on-teal: #0f1a1d;--chat-ink-deep: #3f8797;--heat-none: #2a3236;--heat-read: #34505f;--heat-weak: #a8503f;--heat-mid: #9a7a2c;--heat-good: #4c7a43;--heat-best: #2f7d49;--imp-2: #2f3d5a;--imp-3: #3e5788;--imp-4: #5a7bc8;--hl-key: rgba(240, 196, 40, .3);--hl-memorize: rgba(90, 200, 130, .26);--hl-unsure: rgba(240, 110, 110, .28);--hl-ref: rgba(110, 170, 240, .28);--ul-key: #e6bd3c;--ul-memorize: #5cc685;--ul-unsure: #f08a7c;--ul-ref: #7fb0ea;--hl-active: rgba(127, 188, 201, .25);--shadow-sheet: 0 0 0 1px #313c41, 0 3px 12px #00000008;--shadow-chat: 0 18px 50px -12px rgba(0, 0, 0, .7), 0 2px 8px rgba(0, 0, 0, .4);color-scheme:dark}@media (pointer: coarse){:where(.chip,.chips>button,.tab,.qtab,.mode-switch button,.mode-sub button,.nav button,.pill,.toc-chip,.seg button,.btn,.sx-chips button,.sx-more,.ptrail-stop,.rp-toc-item,.rp-toc-chapter,.chat-followup,.topbar-right button,.topbar-right a,.plan-skip){min-height:var(--touch-min, 44px)}:where(a.chip,a.btn,.topbar-right a){display:inline-flex;align-items:center;justify-content:center}:where(.ptrail-fold,.rp-toggle,.chat-icon){min-width:var(--touch-min, 44px);min-height:var(--touch-min, 44px)}}:root{--page-max: 1360px;--gutter: 1.25rem}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;text-size-adjust:100%}body{margin:0;background:var(--paper);color:var(--ink);font:300 15px/1.7 var(--f-body);-webkit-font-smoothing:antialiased}button,input,select{font:inherit;color:inherit}button,a{touch-action:manipulation}button{cursor:pointer}a{color:var(--teal)}button:disabled{opacity:.45;cursor:not-allowed}b,strong,th{font-weight:600}h1,h2,h3{font-family:var(--f-display);font-weight:700;line-height:1.35;letter-spacing:-.01em}h1{font-size:1.75rem;margin:0 0 .6rem}h2{font-size:1.15rem;margin:0 0 .8rem}h3{font-size:1rem}p{margin:.4rem 0 1rem}:focus-visible{outline:2px solid var(--teal);outline-offset:3px}button,input{border-radius:var(--radius)}.skip{position:absolute;top:-70px;padding:10px;background:var(--surface);z-index:100}.skip:focus{top:0}.topbar{position:sticky;top:0;z-index:10;background:var(--paper);border-top:2.5px solid var(--ink);padding:env(safe-area-inset-top) var(--gutter) 0}.topbar-row{max-width:var(--page-max);margin:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:65px;border-bottom:1px solid var(--rule)}.brand{border:0;background:none;font:700 1.3rem/1.25 var(--f-display);text-align:left;padding:0;flex-shrink:0}.brand small{display:block;margin:3px 0;font:400 .75rem var(--f-body);color:var(--ink-3)}.topbar-right{display:flex;gap:20px;align-items:center;min-width:0}.target-chip{border:1px solid var(--rule);background:var(--surface);font-size:.8rem;padding:5px 10px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:360px}.account{font-size:.86rem;white-space:nowrap;text-decoration:none}.nav{max-width:var(--page-max);margin:auto;display:flex;border-bottom:1px solid var(--rule)}.nav button{flex:1;border:0;border-bottom:2px solid transparent;background:none;padding:.65rem .9rem;color:var(--ink-2);font-size:.92rem;font-weight:500}.nav button[aria-current=page]{color:var(--red);border-bottom-color:var(--red);font-weight:600}.nav button:hover{background:var(--surface)}.mode-sub{max-width:var(--page-max);margin:0 auto;display:flex;gap:8px;padding:10px 0}.mode-sub button{border:1px solid var(--rule);background:none;padding:3px 12px;font-size:.8rem}.mode-sub button[aria-current=page]{border-color:var(--red);color:var(--red)}main{max-width:calc(var(--page-max) + 2 * var(--gutter));padding:2rem var(--gutter) 5rem;margin:auto;min-height:65vh;min-width:0}main:focus{outline:0}.page-head{display:flex;justify-content:space-between;align-items:center;gap:15px;margin:0 0 1.5rem}.eyebrow{display:block;color:var(--ink-3);font:400 .76rem var(--f-body);letter-spacing:.045em;margin:0 0 .55rem}.hint{color:var(--ink-3);font-size:.86rem}.fine{color:var(--ink-3);font-size:.75rem;margin-top:1.5rem}.meta,.subject-no,.timer{font-family:var(--f-mono);font-variant-numeric:tabular-nums}.card{border:1px solid var(--rule);background:var(--surface);border-radius:var(--radius);padding:1.2rem 1.4rem;margin-bottom:12px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--rule);background:none;padding:.5rem 1.05rem;font-size:.86rem;font-weight:500;text-decoration:none;color:var(--ink-2);white-space:nowrap}.btn:hover{border-color:var(--ink)}.btn.primary{background:var(--ink);border-color:var(--ink);color:var(--paper)}.link{border:0;background:none;color:var(--teal);padding:2px;text-decoration:none}.row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.quick{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:1.5rem 0}.quick .card{text-align:left;margin:0;display:flex;flex-direction:column;gap:.5rem}.quick b{font:700 2rem var(--f-display);font-variant-numeric:tabular-nums}.quick span{font-size:.85rem;color:var(--ink-2)}.study-next{display:flex;justify-content:space-between;align-items:center;gap:20px;border-top:2px solid var(--ink);padding:1.75rem}.study-next h2{font-size:1.3rem}.study-next p{margin:0;color:var(--ink-2);font-size:.9rem}.home-columns{display:grid;grid-template-columns:1.1fr 1fr;gap:36px;margin-top:2rem}.subject-link{display:flex;justify-content:space-between;gap:15px;width:100%;text-align:left;padding:14px 0;background:none;border:0;border-bottom:1px solid var(--rule-soft)}.subject-link span:first-child{overflow-wrap:anywhere}.set{width:100%;display:flex;flex-direction:column;gap:8px;padding:20px;border:1px solid var(--rule);background:var(--surface);text-align:left}.set small{color:var(--ink-3)}.set>span{font-size:.85rem;color:var(--teal)}.recent{padding:0;list-style:none}.recent li{display:flex;justify-content:space-between;gap:10px;padding:10px 0;border-bottom:1px solid var(--rule-soft);flex-wrap:wrap}.empty{padding:2.5rem 1.5rem;text-align:center}.empty h2{margin-top:.5rem}.empty p{color:var(--ink-3)}.announce{max-width:var(--page-max);margin:12px auto 0;padding:10px 16px;border:1px solid var(--rule);background:var(--teal-soft);font-size:.86rem;display:flex;justify-content:space-between;gap:12px}.announce.warn{background:var(--ochre-soft);border-color:var(--ochre)}.notice{border-left:3px solid var(--ochre);padding:10px 15px;font-size:.85rem;color:var(--ink-2)}footer{border-top:1px solid var(--rule);max-width:var(--page-max);margin:auto;padding:20px var(--gutter) 35px;font-size:.75rem;color:var(--ink-3)}footer p{margin:5px 0}.catalog-tools{display:flex;align-items:center;gap:25px;justify-content:space-between}.search{border:1px solid var(--rule);background:var(--surface);display:flex;align-items:center;gap:10px;padding:8px 14px;flex:1;max-width:600px}.search input{min-width:0;width:100%;border:0;background:none;outline:0}.search:focus-within{outline:2px solid var(--teal)}.toggle{display:flex;gap:6px;align-items:center;font-size:.85rem;white-space:nowrap}.chips{display:flex;gap:6px;flex-wrap:wrap;margin:16px 0}.chips button{border:1px solid var(--rule);background:none;padding:4px 13px;font-size:.8rem;min-height:36px}.chips button[aria-pressed=true]{color:var(--red);border-color:var(--red);background:var(--red-soft)}.exam-catalog{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.exam-card{position:relative;text-align:left;border:1px solid var(--rule);background:var(--surface);padding:20px 18px;min-height:170px;overflow-wrap:anywhere}.exam-card:hover{border-color:var(--teal)}.exam-card[aria-pressed=true]{border-color:var(--red)}.exam-card h2{font-size:1.05rem;margin-bottom:15px;padding-right:12px}.exam-card p{font-size:.8rem;color:var(--ink-2);margin:0}.card-arrow{position:absolute;right:14px;bottom:14px;font-size:1.2rem;color:var(--teal)}.subject-list{border-top:2px solid var(--ink);margin:20px 0}.subject-row{display:flex;align-items:center;gap:20px;padding:20px 0;border-bottom:1px solid var(--rule)}.subject-row>div{flex:1;min-width:0}.subject-row h2{font:500 1rem var(--f-body);margin:0 0 5px;overflow-wrap:anywhere}.subject-no{color:var(--ink-3);font-size:.85rem}.exam-intro{padding:3rem;max-width:820px}.exam-intro h2{font-size:1.5rem;margin:20px 0}.exam-intro .btn{margin-top:25px}.tag{padding:4px 12px;border:1px solid var(--rule);font-size:.8rem}.progress-row{display:grid;grid-template-columns:minmax(120px,1fr) 1fr 45px;gap:15px;margin:14px 0;align-items:center;font-size:.86rem}.progress-row progress{width:100%;height:7px;accent-color:var(--teal)}.markdown{overflow-wrap:anywhere}.markdown p{margin:.8rem 0}.markdown h3{font-size:1.05rem;margin:1.8rem 0 .8rem}.markdown ul{padding-left:1.3rem}.markdown pre{overflow:auto}.table-scroll{max-width:100%;overflow:auto}table{border-collapse:collapse;font-size:.88rem;width:100%}th,td{border:1px solid var(--rule);padding:7px 10px;text-align:left}.katex-display{overflow-x:auto;overflow-y:hidden;max-width:100%;padding:5px}.drill-head{display:flex;justify-content:space-between;gap:15px;align-items:center;margin-bottom:20px}.timer{font-size:1.3rem}.timer.soon{color:var(--red)}.practice-layout{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:24px;align-items:start}.question-paper{background:var(--surface);border:1px solid var(--rule);border-top:2px solid var(--ink);padding:2rem;min-width:0}.question-head{display:flex;justify-content:space-between;gap:10px;margin-bottom:20px;font-size:.8rem;flex-wrap:wrap}.question-head .meta{color:var(--ink-3)}.stem{font-weight:500;font-size:1.1rem;margin:20px 0 25px;white-space:pre-wrap}.choices{display:flex;flex-direction:column;gap:10px}.choice{display:flex;text-align:left;align-items:flex-start;gap:12px;width:100%;padding:14px 16px;border:1px solid var(--rule);background:var(--surface);line-height:1.8;font-weight:400;overflow-wrap:anywhere;white-space:pre-wrap}.choice>span:nth-child(2){flex:1;min-width:0}.choice-number{border:1px solid var(--ink-3);border-radius:50%;width:24px;height:24px;line-height:22px;flex-shrink:0;text-align:center;font:400 .85rem/22px var(--f-mono);margin-top:2px}.choice[aria-pressed=true]{border-color:var(--ink);background:var(--paper)}.choice[aria-pressed=true] .choice-number{background:var(--ink);color:var(--paper)}.choice:disabled{opacity:1}.choice.answer{border-color:var(--teal);background:var(--teal-soft)}.choice.wrong{border-color:var(--red);background:var(--red-soft)}.choice small{color:var(--teal);font-size:.75rem;white-space:nowrap}.submit{margin-top:25px}.solution{border-top:1px solid var(--rule);margin-top:25px;padding-top:20px}.correct-text{color:var(--teal);font-weight:500}.wrong-text{color:var(--red);font-weight:500}.option-explanation{display:flex;gap:15px;font-size:.9rem;border-bottom:1px solid var(--rule-soft);padding:8px 0}.option-explanation b{color:var(--ink-3);padding-top:12px}.question-foot{border-top:1px solid var(--rule);display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:30px;padding-top:20px}.answer-sheet{background:var(--surface);border:1px solid var(--rule);padding:18px;position:sticky;top:145px}.answer-sheet h2{font-size:1rem}.answer-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:6px}.answer-grid button{background:none;border:1px solid var(--rule);padding:5px 0;min-height:38px;font:.8rem var(--f-mono)}.answer-grid button[aria-current=step]{outline:2px solid var(--ink);outline-offset:1px}.answer-grid .picked{background:var(--ink);color:var(--paper)}.answer-grid .ok{background:var(--teal-soft);border-color:var(--teal)}.answer-grid .ng{background:var(--red-soft);border-color:var(--red)}.answer-grid .marked{box-shadow:inset 0 3px var(--ochre)}.answer-sheet>.btn{width:100%;white-space:normal}.score{display:flex;align-items:center;gap:25px;flex-wrap:wrap}.score>b{font:700 2.8rem var(--f-display)}.score small{font-size:1rem}.score>span{font-size:.9rem}.score>.btn{margin-left:auto}.loading{padding:4rem 0;text-align:center}@media (min-width: 1500px){:root{--page-max: 1440px}}@media (max-width: 1050px){.exam-catalog{grid-template-columns:repeat(3,minmax(0,1fr))}.practice-layout{grid-template-columns:minmax(0,1fr) 210px}}@media (max-width: 760px){.exam-catalog,.quick{grid-template-columns:repeat(2,minmax(0,1fr))}.home-columns{grid-template-columns:1fr;gap:25px}.study-next{align-items:flex-start;flex-direction:column}.practice-layout{display:flex;flex-direction:column}.question-paper{width:100%;padding:1.2rem}.answer-sheet{width:100%;position:static}.answer-grid{grid-template-columns:repeat(10,minmax(0,1fr))}.answer-sheet .btn{width:auto}.catalog-tools{align-items:flex-start;gap:10px;flex-direction:column}.search{width:100%;max-width:none}.target-chip{max-width:230px}.exam-intro{padding:1.5rem}}@media (max-width: 480px){:root{--gutter: 1rem}main{padding-top:1.5rem}h1{font-size:1.45rem}.brand{font-size:1.1rem}.topbar-right{gap:10px}.target-chip{max-width:150px;font-size:.7rem;padding:5px}.nav button{padding:.6rem .5rem;font-size:.85rem}.exam-card{padding:16px 13px;min-height:168px}.exam-card h2{font-size:1rem}.quick{gap:8px}.quick .card{padding:16px}.quick b{font-size:1.7rem}.study-next{padding:1.2rem}.page-head{align-items:flex-start}.page-head>.btn{font-size:.75rem;padding:7px 10px}.subject-row{gap:12px}.subject-row h2{font-size:.9rem}.answer-grid{grid-template-columns:repeat(8,minmax(0,1fr))}.drill-head{align-items:flex-start}.drill-head>.row{justify-content:flex-end}.choice{padding:12px 10px;gap:9px;font-size:.9rem}.score{gap:12px}.score>.btn{margin-left:0}.progress-row{grid-template-columns:minmax(80px,1fr) 1fr 40px;gap:7px}}@media (prefers-reduced-motion: reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}.exam-pass h2{margin:0 0 .6rem}.exam-pass-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:0 0 .8rem}.exam-pass-phone{display:grid;gap:4px;margin:0 0 .8rem;max-width:20rem;font-size:var(--fs-sm, .875rem)}.exam-pass .fine{margin-top:.8rem}.text-link{background:none;border:0;padding:0;color:var(--teal);font:inherit;text-decoration:underline;cursor:pointer}html.native-nav:not([data-plan-focus]):not(.native-nav-typing):has(nav.nav,nav.mode-switch){--native-nav-h: calc(3.25rem + env(safe-area-inset-bottom, 0px)) }html.native-nav body{padding-bottom:var(--native-nav-h, env(safe-area-inset-bottom, 0px))}html.native-nav:not(:has(.topbar,.shell)) body{padding-top:env(safe-area-inset-top,0px)}html.native-nav body:before{content:"";position:fixed;left:0;right:0;top:0;height:env(safe-area-inset-top,0px);z-index:30;background:var(--paper, #f6f4ef)}html.native-nav:has(.topbar,.shell) body:before{z-index:9}html.native-nav:not(:has(.topbar)) :is(.exam-bar,.omr-head){top:env(safe-area-inset-top,0px)}html.native-nav :is(.focus-frame[data-focus],.cst.is-full,.rp-drawer){padding-top:env(safe-area-inset-top,0px)}html.native-nav .topbar{-webkit-backdrop-filter:none;backdrop-filter:none;background:var(--paper, #f6f4ef)}html.native-nav nav.nav,html.native-nav nav.mode-switch{position:fixed;left:0;right:0;bottom:0;z-index:40;display:flex;flex-wrap:nowrap;justify-content:space-around;gap:0;max-width:none;margin:0;height:var(--native-nav-h);padding:0 0 env(safe-area-inset-bottom,0px);overflow-x:auto;scrollbar-width:none;background:var(--surface);border:0;border-top:1px solid var(--rule)}html.native-nav nav.nav::-webkit-scrollbar,html.native-nav nav.mode-switch::-webkit-scrollbar{display:none}html.native-nav nav.nav>button,html.native-nav nav.mode-switch>button{flex:1 0 auto;min-width:4rem;min-height:0;height:100%;margin:0;padding:0 .5rem;background:none;border:0;border-radius:0;border-top:2px solid transparent;font-size:var(--fs-86, .86rem);white-space:nowrap;color:var(--ink-2)}html.native-nav nav.nav>button[aria-current=page],html.native-nav nav.mode-switch>button[aria-current=page]{color:var(--red);border-top-color:var(--red);background:none;font-weight:600}html.native-nav nav>button[data-nn-icon]{font-size:0;position:relative}html.native-nav nav>button[data-nn-icon]:before{content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:1.55rem;height:1.55rem;background:currentColor;-webkit-mask:var(--nn-svg) center / contain no-repeat;mask:var(--nn-svg) center / contain no-repeat}html.native-nav [data-nn-icon=today]:before{--nn-svg: url("data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 24 24%22 fill=%22none%22 stroke=%22%23000%22 stroke-width=%221.8%22 stroke-linecap=%22round%22 stroke-linejoin=%22round%22%3E%3Ccircle cx=%2212%22 cy=%2212%22 r=%224%22/%3E%3Cpath d=%22M12 2v2M12 20v2M4.9 4.9l1.4 1.4M17.7 17.7l1.4 1.4M2 12h2M20 12h2M4.9 19.1l1.4-1.4M17.7 6.3l1.4-1.4%22/%3E%3C/svg%3E")}html.native-nav [data-nn-icon=book]:before{--nn-svg: url("data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 24 24%22 fill=%22none%22 stroke=%22%23000%22 stroke-width=%221.8%22 stroke-linecap=%22round%22 stroke-linejoin=%22round%22%3E%3Cpath d=%22M12 7v14%22/%3E%3Cpath d=%22M3 18a1 1 0 0 1-1-1V4a1 1 0 0 1 1-1h5a4 4 0 0 1 4 4 4 4 0 0 1 4-4h5a1 1 0 0 1 1 1v13a1 1 0 0 1-1 1h-6a3 3 0 0 0-3 3 3 3 0 0 0-3-3z%22/%3E%3C/svg%3E")}html.native-nav [data-nn-icon=map]:before{--nn-svg: url("data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 24 24%22 fill=%22none%22 stroke=%22%23000%22 stroke-width=%221.8%22 stroke-linecap=%22round%22 stroke-linejoin=%22round%22%3E%3Ccircle cx=%225%22 cy=%226%22 r=%222.5%22/%3E%3Ccircle cx=%2219%22 cy=%226%22 r=%222.5%22/%3E%3Ccircle cx=%2212%22 cy=%2218%22 r=%222.5%22/%3E%3Cpath d=%22M7 7.5l3.8 8.3M17 7.5l-3.8 8.3M7.5 6h9%22/%3E%3C/svg%3E")}html.native-nav [data-nn-icon=cards]:before{--nn-svg: url("data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 24 24%22 fill=%22none%22 stroke=%22%23000%22 stroke-width=%221.8%22 stroke-linecap=%22round%22 stroke-linejoin=%22round%22%3E%3Crect x=%223%22 y=%227%22 width=%2214%22 height=%2214%22 rx=%222%22/%3E%3Cpath d=%22M7 3h12a2 2 0 0 1 2 2v12%22/%3E%3C/svg%3E")}html.native-nav [data-nn-icon=study]:before{--nn-svg: url("data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 24 24%22 fill=%22none%22 stroke=%22%23000%22 stroke-width=%221.8%22 stroke-linecap=%22round%22 stroke-linejoin=%22round%22%3E%3Cpath d=%22M22 10 12 5 2 10l10 5z%22/%3E%3Cpath d=%22M6 12v5c0 1.5 2.7 3 6 3s6-1.500 6-3v-5%22/%3E%3C/svg%3E")}html.native-nav [data-nn-icon=drill]:before{--nn-svg: url("data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 24 24%22 fill=%22none%22 stroke=%22%23000%22 stroke-width=%221.8%22 stroke-linecap=%22round%22 stroke-linejoin=%22round%22%3E%3Cpath d=%22M12 20h9%22/%3E%3Cpath d=%22M16.5 3.500a2.100 2.100 0 0 1 3 3L7 19l-4 1 1-4z%22/%3E%3C/svg%3E")}html.native-nav [data-nn-icon=gichul]:before{--nn-svg: url("data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 24 24%22 fill=%22none%22 stroke=%22%23000%22 stroke-width=%221.8%22 stroke-linecap=%22round%22 stroke-linejoin=%22round%22%3E%3Cpath d=%22M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z%22/%3E%3Cpath d=%22M14 2v6h6M8 13h8M8 17h6%22/%3E%3C/svg%3E")}html.native-nav [data-nn-icon=exam]:before{--nn-svg: url("data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 24 24%22 fill=%22none%22 stroke=%22%23000%22 stroke-width=%221.8%22 stroke-linecap=%22round%22 stroke-linejoin=%22round%22%3E%3Ccircle cx=%2212%22 cy=%2214%22 r=%228%22/%3E%3Cpath d=%22M12 10v4l2.500 2M10 2h4%22/%3E%3C/svg%3E")}html.native-nav [data-nn-icon=wrong]:before{--nn-svg: url("data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 24 24%22 fill=%22none%22 stroke=%22%23000%22 stroke-width=%221.8%22 stroke-linecap=%22round%22 stroke-linejoin=%22round%22%3E%3Cpath d=%22M6 3h12a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2z%22/%3E%3Cpath d=%22m9.500 9.500 5 5M14.500 9.500l-5 5%22/%3E%3C/svg%3E")}html.native-nav [data-nn-icon=record]:before{--nn-svg: url("data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 24 24%22 fill=%22none%22 stroke=%22%23000%22 stroke-width=%221.8%22 stroke-linecap=%22round%22 stroke-linejoin=%22round%22%3E%3Cpath d=%22M3 3v18h18%22/%3E%3Cpath d=%22M8 17v-5M13 17V7M18 17v-8%22/%3E%3C/svg%3E")}html.native-nav.native-nav-typing nav.nav,html.native-nav.native-nav-typing nav.mode-switch{display:none}html.native-nav :is(.chat-fab,.chat-greeting,.study-fab,.study-plan-badge,.plan-on-badge,.st-fab,.st-panel,.study-panel,.clock,.update,.dv-update,.toast){translate:0 calc(-1 * var(--native-nav-h, 0px))}html.native-nav :is(.omr-foot,.verdict,.cmap-detail){bottom:var(--native-nav-h, 0px)}@media (min-width: 40rem){html.native-nav:not(.native-nav-typing) .chat-panel{translate:0 calc(-1 * var(--native-nav-h, 0px))}}.pulpul-switch{position:fixed;z-index:55;left:0;top:42%;width:10px;height:48px;border-radius:0 10px 10px 0;background:var(--teal, #1f6f6b);opacity:.45}.pulpul-switch:before{content:"";position:absolute;top:14px;right:3px;bottom:14px;left:3px;border-left:2px solid var(--paper, #fff)}.pulpul-switch:after{content:"";position:absolute;top:-6px;right:-24px;bottom:-6px;left:0}html.pulpul-busy .pulpul-switch{display:none}.hover-tip{position:fixed;z-index:10000;left:0;top:0;box-sizing:border-box;width:max-content;max-width:min(20rem,calc(100vw - 16px));padding:.4rem .6rem;border-radius:6px;background:var(--ink, #1a2a30);color:var(--paper, #fff);font-family:var(--f-body, system-ui, sans-serif);font-size:var(--fs-80, .8rem);font-weight:400;line-height:1.45;letter-spacing:0;text-align:left;white-space:pre-line;word-break:keep-all;overflow-wrap:anywhere;pointer-events:none;box-shadow:0 4px 14px #122c3447;animation:hover-tip-in .11s ease-out}.hover-tip[hidden]{display:none}.hover-tip:after{content:"";position:absolute;left:var(--tip-arrow-x, 50%);bottom:-4px;width:8px;height:8px;margin-left:-4px;background:inherit;transform:rotate(45deg)}.hover-tip.is-below:after{bottom:auto;top:-4px}@keyframes hover-tip-in{0%{opacity:0;transform:translateY(2px)}to{opacity:1;transform:none}}@media (prefers-reduced-motion: reduce){.hover-tip{animation:none}}@media print{.hover-tip{display:none}}
