.free-math-textbooks-module__vflkUq__root{--ease:cubic-bezier(.22, 1, .36, 1);--header-h:3.75rem;color:var(--ink);overflow-x:clip}@media (min-width:768px){.free-math-textbooks-module__vflkUq__root{--header-h:4.5rem}}.free-math-textbooks-module__vflkUq__sectionKicker{font-family:var(--font-dm-mono), ui-monospace, monospace;letter-spacing:.22em;text-transform:uppercase;color:var(--ink-muted);margin:0 0 .6rem;font-size:.7rem}.free-math-textbooks-module__vflkUq__hero{max-width:var(--page-max);padding:clamp(2.5rem, 7vw, 5.5rem) var(--page-pad) 0;margin:0 auto;position:relative}.free-math-textbooks-module__vflkUq__heroGrid{pointer-events:none;background:linear-gradient(var(--line-soft) 1px, transparent 1px) 0 0 / 36px 36px, linear-gradient(90deg, var(--line-soft) 1px, transparent 1px) 0 0 / 36px 36px;position:absolute;inset:-2rem 0 30%;-webkit-mask-image:radial-gradient(70% 80% at 30% 20%,#000 10%,#0000 75%);mask-image:radial-gradient(70% 80% at 30% 20%,#000 10%,#0000 75%)}.free-math-textbooks-module__vflkUq__heroInner{position:relative}.free-math-textbooks-module__vflkUq__kicker{border:1px solid var(--line-soft);border-radius:var(--radius-pill);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);font-family:var(--font-dm-mono), ui-monospace, monospace;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-muted);background:#fffc;align-items:center;gap:.6rem;margin:0;padding:.45rem .9rem .45rem .7rem;font-size:.68rem;display:inline-flex}.free-math-textbooks-module__vflkUq__kickerDot{background:#1b6e60;border-radius:50%;width:.5rem;height:.5rem;animation:2.4s ease-in-out infinite free-math-textbooks-module__vflkUq__pulse;box-shadow:0 0 0 4px #1b6e602e}@keyframes free-math-textbooks-module__vflkUq__pulse{50%{box-shadow:0 0 0 7px #1b6e600a}}.free-math-textbooks-module__vflkUq__h1{font-family:var(--font-abakcus-serif), Georgia, serif;color:var(--ink);margin:1.6rem 0 0;font-weight:400}.free-math-textbooks-module__vflkUq__h1Main{letter-spacing:-.045em;animation:free-math-textbooks-module__vflkUq__rise 1s var(--ease) both;font-size:clamp(3rem,10.5vw,9.5rem);line-height:.9;display:block}.free-math-textbooks-module__vflkUq__h1Sub{letter-spacing:-.02em;color:var(--ink-muted);animation:free-math-textbooks-module__vflkUq__rise 1s .12s var(--ease) both;margin-top:.9rem;font-size:clamp(1.35rem,3.4vw,2.75rem);font-style:italic;line-height:1.05;display:block}.free-math-textbooks-module__vflkUq__dek{max-width:38rem;color:var(--ink-muted);animation:free-math-textbooks-module__vflkUq__rise 1s .22s var(--ease) both;margin:1.75rem 0 0;font-size:clamp(1.05rem,1.6vw,1.25rem);line-height:1.55}@keyframes free-math-textbooks-module__vflkUq__rise{0%{opacity:0;transform:translateY(18px)}}.free-math-textbooks-module__vflkUq__stats{border-top:1px solid var(--ink);max-width:44rem;animation:free-math-textbooks-module__vflkUq__rise 1s .32s var(--ease) both;grid-template-columns:repeat(4,minmax(0,1fr));margin:2.5rem 0 0;display:grid}.free-math-textbooks-module__vflkUq__stats>div{padding:.9rem 1rem 0 0}.free-math-textbooks-module__vflkUq__stats>div+div{border-left:1px solid var(--line);padding-left:1rem}.free-math-textbooks-module__vflkUq__stats dt{font-family:var(--font-dm-mono), ui-monospace, monospace;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-muted);font-size:.66rem}.free-math-textbooks-module__vflkUq__stats dd{font-family:var(--font-abakcus-serif), Georgia, serif;letter-spacing:-.03em;margin:.35rem 0 0;font-size:clamp(1.8rem,4vw,3rem);line-height:1}.free-math-textbooks-module__vflkUq__shelfWrap{margin:clamp(2.5rem,6vw,4.5rem) 0 0;position:relative}.free-math-textbooks-module__vflkUq__shelfScroll{scrollbar-width:none;padding-top:1.5rem;overflow:auto visible}.free-math-textbooks-module__vflkUq__shelfScroll::-webkit-scrollbar{display:none}.free-math-textbooks-module__vflkUq__shelf{align-items:flex-end;gap:3px;width:max-content;min-width:100%;height:clamp(150px,20vw,230px);padding:0 .25rem;display:flex}.free-math-textbooks-module__vflkUq__spine{all:unset;box-sizing:border-box;flex:1 0 var(--w);width:var(--w);max-width:calc(var(--w) * 1.6);height:var(--h);cursor:pointer;background:linear-gradient(to bottom, transparent calc(var(--band) - 0.1%), var(--accent) var(--band), var(--accent) calc(var(--band) + 5%), transparent calc(var(--band) + 5.1%)), linear-gradient(90deg, #ffffff8c, transparent 35%, #0000000d), var(--wash);box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--accent) 22%, transparent);transform-origin:bottom;transition:transform .35s var(--ease), background-color .2s;animation:free-math-textbooks-module__vflkUq__spineIn .9s var(--ease) both;animation-delay:calc(.45s + var(--i) * 12ms);border-radius:3px 3px 1px 1px;position:relative}.free-math-textbooks-module__vflkUq__spine[data-first]{margin-left:12px}.free-math-textbooks-module__vflkUq__spine:after{content:"";background:var(--accent);opacity:.5;border-radius:50%;width:3px;height:3px;position:absolute;bottom:12%;left:50%;transform:translate(-50%)}.free-math-textbooks-module__vflkUq__spine:hover,.free-math-textbooks-module__vflkUq__spine:focus-visible{background-color:color-mix(in srgb, var(--wash) 70%, var(--accent));transform:translateY(-14px)}.free-math-textbooks-module__vflkUq__spine:focus-visible{outline:2px solid var(--accent);outline-offset:2px}@keyframes free-math-textbooks-module__vflkUq__spineIn{0%{opacity:0;transform:scaleY(0)}}.free-math-textbooks-module__vflkUq__plank{background:var(--ink);border-radius:2px;width:max(100%,1rem);min-width:max-content;height:10px;box-shadow:0 18px 30px -18px #2123248c}.free-math-textbooks-module__vflkUq__shelfCaption{flex-wrap:wrap;align-items:baseline;gap:.35rem .75rem;min-height:3.2rem;padding:1rem 0 0;font-size:.95rem;display:flex}.free-math-textbooks-module__vflkUq__captionDot{border-radius:50%;align-self:center;width:.6rem;height:.6rem}.free-math-textbooks-module__vflkUq__captionSubject{font-family:var(--font-dm-mono), ui-monospace, monospace;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-muted);font-size:.7rem}.free-math-textbooks-module__vflkUq__captionTitle{font-family:var(--font-abakcus-serif), Georgia, serif;font-size:1.15rem}.free-math-textbooks-module__vflkUq__captionAuthor,.free-math-textbooks-module__vflkUq__captionHint{color:var(--ink-muted)}.free-math-textbooks-module__vflkUq__captionHint{font-family:var(--font-abakcus-serif), Georgia, serif;font-style:italic}.free-math-textbooks-module__vflkUq__intro{max-width:44rem;padding:0 var(--page-pad);margin:clamp(3rem,8vw,6rem) auto 0}.free-math-textbooks-module__vflkUq__disclosure{border-left:3px solid var(--pastel-peach);background:color-mix(in srgb, var(--pastel-peach) 35%, white);color:var(--ink-muted);border-radius:0 .75rem .75rem 0;margin:2rem 0 0;padding:1rem 1.25rem;font-size:.9rem;line-height:1.55}.free-math-textbooks-module__vflkUq__explorer [data-reveal]{transition:transform .35s var(--ease), box-shadow .35s var(--ease), background-color .25s}.free-math-textbooks-module__vflkUq__explorer [data-reveal]:not([data-in]){opacity:0}.free-math-textbooks-module__vflkUq__explorer [data-reveal][data-in]{animation:free-math-textbooks-module__vflkUq__reveal .85s var(--ease) backwards;animation-delay:calc(var(--d,0) * 45ms)}@keyframes free-math-textbooks-module__vflkUq__reveal{0%{opacity:0;transform:translateY(24px)}}.free-math-textbooks-module__vflkUq__explorer [data-d]{stroke-dasharray:1;stroke-dashoffset:1px}.free-math-textbooks-module__vflkUq__explorer [data-in] [data-d]{animation:free-math-textbooks-module__vflkUq__draw 1.3s var(--ease) forwards;animation-delay:calc(.15s + var(--d,0) * 45ms)}.free-math-textbooks-module__vflkUq__explorer [data-reveal] circle[fill=currentColor]{opacity:0;transition:opacity .5s .6s}.free-math-textbooks-module__vflkUq__explorer [data-in] circle[fill=currentColor]{opacity:1}@keyframes free-math-textbooks-module__vflkUq__draw{to{stroke-dashoffset:0}}.free-math-textbooks-module__vflkUq__explorer{margin-top:clamp(4rem,9vw,7rem)}.free-math-textbooks-module__vflkUq__atlasSection{max-width:var(--page-max);padding:0 var(--page-pad);margin:0 auto}.free-math-textbooks-module__vflkUq__atlasHead{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:1rem 2rem;margin-bottom:1.75rem;display:flex}.free-math-textbooks-module__vflkUq__atlasTitle{font-family:var(--font-abakcus-serif), Georgia, serif;letter-spacing:-.035em;margin:0;font-size:clamp(2rem,4.6vw,3.5rem);font-weight:400;line-height:1}.free-math-textbooks-module__vflkUq__atlasNote{max-width:22rem;color:var(--ink-muted);margin:0;font-size:.95rem}.free-math-textbooks-module__vflkUq__atlas{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:.75rem;display:grid}.free-math-textbooks-module__vflkUq__tile{all:unset;box-sizing:border-box;cursor:pointer;border-radius:var(--radius-card);background:color-mix(in srgb, var(--wash,var(--tonal)) 55%, white);min-height:168px;box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--accent,var(--ink)) 10%, transparent);isolation:isolate;grid-template-rows:auto 1fr auto auto;gap:.3rem;padding:1rem 1.1rem 1.05rem;display:grid;position:relative;overflow:hidden}.free-math-textbooks-module__vflkUq__tile:before{content:"";z-index:-1;background:radial-gradient(120% 90% at 100% 0%, var(--wash,var(--tonal)), transparent 60%);opacity:0;transition:opacity .35s;position:absolute;inset:0}.free-math-textbooks-module__vflkUq__tile:hover:before,.free-math-textbooks-module__vflkUq__tile[aria-pressed=true]:before{opacity:1}.free-math-textbooks-module__vflkUq__tile:hover{box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--accent,var(--ink)) 30%, transparent), var(--shadow-soft)}.free-math-textbooks-module__vflkUq__tile[data-in]:hover{transform:translateY(-3px)}.free-math-textbooks-module__vflkUq__tile[aria-pressed=true]{background:var(--wash,var(--tonal));box-shadow:inset 0 0 0 2px var(--accent,var(--ink)), var(--shadow-soft)}.free-math-textbooks-module__vflkUq__tile:focus-visible{outline:2px solid var(--accent,var(--ink));outline-offset:3px}.free-math-textbooks-module__vflkUq__tile[data-empty]{opacity:.45!important}.free-math-textbooks-module__vflkUq__tileAll{--wash:var(--tonal);background:var(--ink);color:#fff;box-shadow:none}.free-math-textbooks-module__vflkUq__tileAll:before{display:none}.free-math-textbooks-module__vflkUq__tileAll[aria-pressed=true]{background:var(--ink);box-shadow:inset 0 0 0 2px var(--ink), var(--shadow-card)}.free-math-textbooks-module__vflkUq__tileAll[aria-pressed=false]{background:color-mix(in srgb, var(--ink) 82%, white)}.free-math-textbooks-module__vflkUq__tileAll .free-math-textbooks-module__vflkUq__tileCount{color:#ffffffa6}.free-math-textbooks-module__vflkUq__tileBars{grid-row:1/3;align-items:flex-end;gap:4px;height:64px;padding-bottom:.5rem;display:flex}.free-math-textbooks-module__vflkUq__tileBars span{filter:saturate(1.3)brightness(1.5);transform-origin:bottom;animation:free-math-textbooks-module__vflkUq__spineIn .9s var(--ease) both;border-radius:2px 2px 0 0;flex:1}.free-math-textbooks-module__vflkUq__tileBars span:nth-child(3n){animation-delay:80ms}.free-math-textbooks-module__vflkUq__tileBars span:nth-child(3n+1){animation-delay:.16s}.free-math-textbooks-module__vflkUq__tileIndex{font-family:var(--font-dm-mono), ui-monospace, monospace;letter-spacing:.12em;color:color-mix(in srgb, var(--accent) 80%, var(--ink));font-size:.68rem}.free-math-textbooks-module__vflkUq__tileCheck{border:1.5px solid color-mix(in srgb, var(--accent) 35%, transparent);width:1.35rem;height:1.35rem;transition:background .2s, border-color .2s, transform .3s var(--ease);border-radius:50%;position:absolute;top:.85rem;right:.85rem}.free-math-textbooks-module__vflkUq__tile[aria-pressed=true] .free-math-textbooks-module__vflkUq__tileCheck{border-color:var(--accent);background:no-repeat center / .7rem url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2.5 6.2 5 8.5l4.5-5' fill='none' stroke='white' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"), var(--accent);transform:scale(1.08)}.free-math-textbooks-module__vflkUq__tileGlyph{width:128px;height:52px;color:var(--accent);align-self:center;overflow:visible}.free-math-textbooks-module__vflkUq__tileName{font-family:var(--font-abakcus-serif), Georgia, serif;letter-spacing:-.015em;font-size:1.12rem;line-height:1.15}.free-math-textbooks-module__vflkUq__tileCount{font-family:var(--font-dm-mono), ui-monospace, monospace;letter-spacing:.08em;color:var(--ink-muted);font-size:.72rem}.free-math-textbooks-module__vflkUq__tileCount b{color:inherit;font-weight:400}.free-math-textbooks-module__vflkUq__tile:not(.free-math-textbooks-module__vflkUq__tileAll) .free-math-textbooks-module__vflkUq__tileCount b{color:var(--accent)}.free-math-textbooks-module__vflkUq__bar{top:var(--header-h);z-index:30;padding:.7rem var(--page-pad);-webkit-backdrop-filter:saturate(1.4)blur(16px);border-block:1px solid var(--line-soft);background:#ffffffc7;margin-top:2.5rem;position:sticky}.free-math-textbooks-module__vflkUq__barInner{max-width:var(--page-max);flex-wrap:wrap;align-items:center;gap:.6rem;margin:0 auto;display:flex}.free-math-textbooks-module__vflkUq__search{border-radius:var(--radius-pill);background:var(--tonal);height:2.6rem;box-shadow:inset 0 0 0 1px var(--line-soft);color:var(--ink-muted);flex:260px;align-items:center;gap:.55rem;padding:0 1rem;transition:box-shadow .2s,background .2s;display:flex}.free-math-textbooks-module__vflkUq__search:focus-within{box-shadow:inset 0 0 0 1.5px var(--ink), 0 8px 24px -16px #00000059;background:#fff}.free-math-textbooks-module__vflkUq__search svg{flex:none;width:16px;height:16px}.free-math-textbooks-module__vflkUq__search input{all:unset;min-width:0;font:inherit;color:var(--ink);flex:1;font-size:.95rem}.free-math-textbooks-module__vflkUq__search input::placeholder{color:var(--ink-muted)}.free-math-textbooks-module__vflkUq__seg{border-radius:var(--radius-pill);background:var(--tonal);box-shadow:inset 0 0 0 1px var(--line-soft);padding:3px;display:inline-flex}.free-math-textbooks-module__vflkUq__seg button{all:unset;cursor:pointer;border-radius:var(--radius-pill);color:var(--ink-muted);padding:.42rem .85rem;font-size:.85rem;transition:background .2s,color .2s}.free-math-textbooks-module__vflkUq__seg button:hover{color:var(--ink)}.free-math-textbooks-module__vflkUq__seg button[aria-pressed=true]{background:var(--ink);color:#fff}.free-math-textbooks-module__vflkUq__seg button:focus-visible{outline:2px solid var(--ink);outline-offset:1px}.free-math-textbooks-module__vflkUq__status{font-family:var(--font-dm-mono), ui-monospace, monospace;letter-spacing:.06em;color:var(--ink-muted);align-items:center;gap:.75rem;margin:0 0 0 auto;font-size:.78rem;display:inline-flex}.free-math-textbooks-module__vflkUq__status b{color:var(--ink);font-weight:400}.free-math-textbooks-module__vflkUq__reset{all:unset;cursor:pointer;border-radius:var(--radius-pill);background:var(--ink);color:#fff;font-family:var(--font-abakcus-sans), system-ui, sans-serif;letter-spacing:0;padding:.3rem .75rem;font-size:.78rem}.free-math-textbooks-module__vflkUq__reset:focus-visible{outline:2px solid var(--ink);outline-offset:2px}.free-math-textbooks-module__vflkUq__list{max-width:var(--page-max);padding:0 var(--page-pad);scroll-margin-top:calc(var(--header-h) + 5rem);gap:clamp(1.25rem,3vw,2rem);margin:clamp(2rem,5vw,3.5rem) auto 0;display:grid}.free-math-textbooks-module__vflkUq__subject{scroll-margin-top:calc(var(--header-h) + 5rem);background:radial-gradient(90% 60% at 100% 0%, color-mix(in srgb, var(--wash) 90%, white), transparent 70%), color-mix(in srgb, var(--wash) 38%, white);border-radius:clamp(1.25rem,2.5vw,2rem);padding:clamp(1.25rem,3.5vw,2.75rem)}.free-math-textbooks-module__vflkUq__subjectHead{border-bottom:1.5px solid var(--accent);grid-template-columns:auto minmax(0,1fr) auto;align-items:end;gap:1.5rem clamp(1.25rem,3vw,2.5rem);margin-bottom:clamp(1.25rem,3vw,2rem);padding-bottom:clamp(1.25rem,3vw,2rem);display:grid}.free-math-textbooks-module__vflkUq__subjectMeta{flex-direction:column;gap:.5rem;display:flex}.free-math-textbooks-module__vflkUq__subjectIndex{font-family:var(--font-dm-mono), ui-monospace, monospace;letter-spacing:.2em;color:var(--accent);font-size:.72rem}.free-math-textbooks-module__vflkUq__subjectGlyph{width:160px;height:64px;color:var(--accent);overflow:visible}.free-math-textbooks-module__vflkUq__subjectName{font-family:var(--font-abakcus-serif), Georgia, serif;letter-spacing:-.035em;margin:0 0 .6rem;font-size:clamp(1.9rem,4.2vw,3.25rem);font-weight:400;line-height:1}.free-math-textbooks-module__vflkUq__subjectIntro{max-width:40rem;color:var(--ink-muted);margin:0;line-height:1.55}.free-math-textbooks-module__vflkUq__subjectCount{text-align:right;margin:0;line-height:1}.free-math-textbooks-module__vflkUq__subjectCount b{font-family:var(--font-abakcus-serif), Georgia, serif;letter-spacing:-.05em;color:var(--accent);font-size:clamp(2.6rem,6vw,4.5rem);font-weight:400;display:block}.free-math-textbooks-module__vflkUq__subjectCount span{font-family:var(--font-dm-mono), ui-monospace, monospace;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-muted);font-size:.7rem}.free-math-textbooks-module__vflkUq__books{grid-template-columns:repeat(auto-fill,minmax(min(100%,330px),1fr));gap:.9rem;margin:0;padding:0;list-style:none;display:grid}.free-math-textbooks-module__vflkUq__book{border-radius:var(--radius-card);box-shadow:0 0 0 1px color-mix(in srgb, var(--accent) 10%, transparent), 0 1px 2px #2123240a;scroll-margin-top:calc(var(--header-h) + 6rem);background:#fff;flex-direction:column;padding:1.35rem 1.35rem 1.2rem;display:flex;position:relative}.free-math-textbooks-module__vflkUq__book:after{content:"";border-radius:inherit;box-shadow:0 0 0 2px var(--accent);opacity:0;pointer-events:none;transition:opacity .3s;position:absolute;inset:0}.free-math-textbooks-module__vflkUq__book[data-in]:hover{box-shadow:0 0 0 1px color-mix(in srgb, var(--accent) 25%, transparent), var(--shadow-card);transform:translateY(-4px)}.free-math-textbooks-module__vflkUq__book[data-flash]:after{animation:free-math-textbooks-module__vflkUq__flash 2.2s var(--ease) forwards}@keyframes free-math-textbooks-module__vflkUq__flash{0%,45%{opacity:1}to{opacity:0}}.free-math-textbooks-module__vflkUq__bookTop{justify-content:space-between;align-items:center;gap:.75rem;margin-bottom:1rem;display:flex}.free-math-textbooks-module__vflkUq__bookIndex{font-family:var(--font-dm-mono), ui-monospace, monospace;letter-spacing:.14em;color:var(--accent);font-size:.72rem}.free-math-textbooks-module__vflkUq__bookTags{flex-wrap:wrap;justify-content:flex-end;gap:.35rem;display:inline-flex}.free-math-textbooks-module__vflkUq__tag,.free-math-textbooks-module__vflkUq__tagLevel{border-radius:var(--radius-pill);color:var(--ink-muted);box-shadow:inset 0 0 0 1px var(--line);padding:.22rem .6rem;font-size:.72rem;line-height:1.3}.free-math-textbooks-module__vflkUq__tagLevel{box-shadow:none;color:var(--ink);background:var(--tonal)}.free-math-textbooks-module__vflkUq__tagLevel[data-level=high-school]{background:var(--pastel-lime)}.free-math-textbooks-module__vflkUq__tagLevel[data-level=undergraduate]{background:var(--pastel-sky)}.free-math-textbooks-module__vflkUq__tagLevel[data-level=advanced]{background:var(--pastel-peach)}.free-math-textbooks-module__vflkUq__bookTitle{font-family:var(--font-abakcus-serif), Georgia, serif;letter-spacing:-.02em;margin:0 0 .55rem;font-size:1.32rem;font-weight:400;line-height:1.18}.free-math-textbooks-module__vflkUq__bookAuthor{margin:0 0 .9rem;font-size:.93rem;font-weight:500}.free-math-textbooks-module__vflkUq__bookAuthor span{color:var(--ink-muted);margin-top:.15rem;font-weight:400;display:block}.free-math-textbooks-module__vflkUq__bookDesc{color:color-mix(in srgb, var(--ink) 82%, white);flex:1;margin:0 0 1.2rem;font-size:.95rem;line-height:1.6}.free-math-textbooks-module__vflkUq__bookActions{border-top:1px dashed var(--line);flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:.5rem;padding-top:1rem;display:flex}.free-math-textbooks-module__vflkUq__open,.free-math-textbooks-module__vflkUq__print{border-radius:var(--radius-pill);min-height:2.35rem;transition:background .2s, color .2s, box-shadow .2s, transform .2s var(--ease);align-items:center;gap:.45rem;padding:0 1rem;font-size:.86rem;font-weight:500;text-decoration:none;display:inline-flex}.free-math-textbooks-module__vflkUq__print{color:var(--ink-muted);box-shadow:inset 0 0 0 1px var(--line)}.free-math-textbooks-module__vflkUq__print:hover{color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink)}.free-math-textbooks-module__vflkUq__print svg{width:14px;height:14px}.free-math-textbooks-module__vflkUq__open{color:#fff;background:var(--accent);box-shadow:0 8px 18px -10px var(--accent)}.free-math-textbooks-module__vflkUq__open:hover{background:var(--ink);box-shadow:0 10px 22px -10px var(--ink)}.free-math-textbooks-module__vflkUq__arrow{width:14px;height:14px;transition:transform .3s var(--ease)}.free-math-textbooks-module__vflkUq__open:hover .free-math-textbooks-module__vflkUq__arrow{transform:translate(2px,-2px)}.free-math-textbooks-module__vflkUq__open:focus-visible,.free-math-textbooks-module__vflkUq__print:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.free-math-textbooks-module__vflkUq__empty{border-radius:var(--radius-card);background:var(--tonal);font-family:var(--font-abakcus-serif), Georgia, serif;color:var(--ink-muted);justify-items:center;gap:1rem;padding:5rem 1rem;font-size:1.3rem;font-style:italic;display:grid}.free-math-textbooks-module__vflkUq__empty p{margin:0}.free-math-textbooks-module__vflkUq__faq{max-width:52rem;padding:0 var(--page-pad);margin:clamp(4rem,9vw,7rem) auto clamp(4rem,8vw,6rem)}.free-math-textbooks-module__vflkUq__faqTitle{font-family:var(--font-abakcus-serif), Georgia, serif;letter-spacing:-.035em;margin:0 0 1.75rem;font-size:clamp(2rem,4.4vw,3.25rem);font-weight:400;line-height:1}.free-math-textbooks-module__vflkUq__faqList{border-top:1px solid var(--ink)}.free-math-textbooks-module__vflkUq__faqItem{border-bottom:1px solid var(--line)}.free-math-textbooks-module__vflkUq__faqItem summary{cursor:pointer;font-family:var(--font-abakcus-serif), Georgia, serif;justify-content:space-between;align-items:center;gap:1.5rem;padding:1.3rem 0;font-size:clamp(1.1rem,2vw,1.35rem);line-height:1.3;list-style:none;display:flex}.free-math-textbooks-module__vflkUq__faqItem summary::-webkit-details-marker{display:none}.free-math-textbooks-module__vflkUq__faqIcon{background:var(--tonal);width:2rem;height:2rem;transition:background .25s, transform .35s var(--ease);border-radius:50%;flex:none;position:relative}.free-math-textbooks-module__vflkUq__faqIcon:before,.free-math-textbooks-module__vflkUq__faqIcon:after{content:"";background:currentColor;width:.75rem;height:1.5px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.free-math-textbooks-module__vflkUq__faqIcon:after{transform:translate(-50%,-50%)rotate(90deg)}.free-math-textbooks-module__vflkUq__faqItem[open] .free-math-textbooks-module__vflkUq__faqIcon{background:var(--pastel-lime);transform:rotate(45deg)}.free-math-textbooks-module__vflkUq__faqItem p{color:var(--ink-muted);margin:0;padding:0 3.5rem 1.5rem 0;line-height:1.65}@media (max-width:760px){.free-math-textbooks-module__vflkUq__stats{grid-template-columns:repeat(2,minmax(0,1fr))}.free-math-textbooks-module__vflkUq__stats>div:nth-child(3){border-left:0;padding-left:0}.free-math-textbooks-module__vflkUq__stats>div:nth-child(n+3){border-top:1px solid var(--line);margin-top:.9rem}.free-math-textbooks-module__vflkUq__subjectHead{grid-template-columns:minmax(0,1fr) auto;align-items:start}.free-math-textbooks-module__vflkUq__subjectMeta{flex-direction:row;grid-column:1/-1;justify-content:space-between;align-items:center}.free-math-textbooks-module__vflkUq__subjectGlyph{width:120px;height:48px}.free-math-textbooks-module__vflkUq__status{justify-content:space-between;width:100%;margin-left:0}.free-math-textbooks-module__vflkUq__faqItem p{padding-right:0}}@media (max-width:520px){.free-math-textbooks-module__vflkUq__atlas{grid-template-columns:repeat(2,minmax(0,1fr));gap:.5rem}.free-math-textbooks-module__vflkUq__tile{min-height:148px;padding:.85rem}.free-math-textbooks-module__vflkUq__tileGlyph{width:100px;height:40px}.free-math-textbooks-module__vflkUq__tileName{font-size:.98rem}.free-math-textbooks-module__vflkUq__seg{flex:1}.free-math-textbooks-module__vflkUq__seg button{text-align:center;flex:1;padding-inline:.5rem}.free-math-textbooks-module__vflkUq__spine{flex-basis:calc(var(--w) * .8);width:calc(var(--w) * .8)}}@media (prefers-reduced-motion:reduce){.free-math-textbooks-module__vflkUq__root *,.free-math-textbooks-module__vflkUq__root :before,.free-math-textbooks-module__vflkUq__root :after{transition:none!important;animation:none!important}.free-math-textbooks-module__vflkUq__explorer [data-reveal]:not([data-in]){opacity:1}.free-math-textbooks-module__vflkUq__explorer [data-d]{stroke-dashoffset:0}.free-math-textbooks-module__vflkUq__explorer [data-reveal] circle[fill=currentColor]{opacity:1}.free-math-textbooks-module__vflkUq__book[data-flash]:after{opacity:1}}
