.math-catalog{--catalog-surface:#fff;--catalog-tint:#f1f2fc;--catalog-grid:#dedfec;--catalog-accent:#3a3bbe;--catalog-teal:#25766d;max-width:1184px;margin:0 auto;padding:0 32px;font-family:Arial,Helvetica,sans-serif}[data-theme=dark] .math-catalog{--catalog-surface:#171b24;--catalog-tint:#1a2032;--catalog-grid:#30384b;--catalog-accent:#b0bcff;--catalog-teal:#82cfbf}.math-catalog h2,.math-catalog h3{letter-spacing:-.6px;font-weight:500}.math-kicker{color:var(--catalog-accent);letter-spacing:1.7px;text-transform:uppercase;margin:0 0 20px;font-size:10px;font-weight:700;line-height:1.6}.math-home-hero{grid-template-columns:1fr 1fr;align-items:center;gap:64px;padding:64px 0 60px;display:grid}.math-home-hero h1{letter-spacing:-3px;margin:0 0 26px;font-size:clamp(48px,5.1vw,72px);line-height:1.07}.math-home-hero h1 em{color:var(--catalog-accent);font-weight:400}.math-intro{max-width:510px;color:var(--muted);margin:0;font-size:17px;line-height:1.8}.math-hero-actions{flex-wrap:wrap;align-items:center;gap:12px 24px;margin-top:30px;display:flex}.math-primary{color:#fff;background:#3637b9;border:1px solid #0000;border-radius:8px;justify-content:center;align-items:center;gap:28px;min-height:48px;padding:14px 19px;font-size:14px;font-weight:600;line-height:1.5;display:inline-flex}.math-primary:hover{color:#fff;background:#282992}[data-theme=dark] .math-primary{color:#151b38;background:#b0bcff}[data-theme=dark] .math-primary:hover{color:#151b38;background:#c7cfff}.math-text-link{min-height:44px;color:var(--catalog-accent);align-items:center;gap:12px;font-size:13px;line-height:1.6;display:inline-flex}.math-text-link:hover{text-underline-offset:5px;text-decoration:underline}.math-hero-note{color:var(--muted);flex-wrap:wrap;gap:8px;margin:26px 0 0;font-size:11px;line-height:1.8;display:flex}.area-preview{background:var(--catalog-surface);border:1px solid var(--line);border-radius:16px;min-width:0;margin:0;padding:24px 28px 0;box-shadow:0 12px 40px #24254205}.area-preview figcaption{gap:10px;display:grid}.preview-eyebrow{letter-spacing:1.5px;color:var(--catalog-teal);align-items:center;gap:8px;font-size:9px;font-weight:700;display:flex}.preview-eyebrow>span{background:var(--catalog-teal);border-radius:50%;width:6px;height:6px;display:block}.preview-title{letter-spacing:-.3px;font-size:17px}.area-preview svg{width:100%;margin:8px 0 0;display:block;overflow:visible}.preview-grid{fill:none;stroke:var(--catalog-grid);stroke-width:.75px;stroke-dasharray:3 5}.preview-axis{fill:none;stroke:var(--muted);stroke-width:1px}.preview-rects{fill:var(--catalog-accent);fill-opacity:.1;stroke:var(--catalog-accent);stroke-opacity:.6;stroke-width:1px}.preview-curve{fill:none;stroke:var(--catalog-accent);stroke-width:2.8px;stroke-linecap:round}.preview-labels{fill:var(--muted);font:12px Arial,sans-serif}.preview-labels .curve-label{fill:var(--catalog-accent);font:italic 19px Georgia,serif}.preview-control{grid-template-columns:114px 1fr;align-items:center;gap:12px;margin-top:2px;display:grid}.preview-control label{justify-content:space-between;align-items:center;gap:10px;font-size:12px;display:flex}.preview-control label output{color:var(--catalog-accent);font-variant-numeric:tabular-nums;font-weight:700}.preview-control input{width:100%;min-width:0;min-height:44px;accent-color:var(--catalog-accent);cursor:pointer;margin:0}.preview-results{border-top:1px solid var(--line);grid-template-columns:1fr 1fr;gap:16px;margin-top:4px;padding-top:14px;display:grid}.preview-results>div{gap:5px;display:grid}.preview-results>div+div{border-left:1px solid var(--line);padding-left:24px}.preview-results>div>span{color:var(--muted);font-size:10px}.preview-results output,.preview-results strong{font-variant-numeric:tabular-nums;color:var(--catalog-accent);font-size:21px;font-weight:500;line-height:1.5}.preview-results strong{color:var(--catalog-teal)}.preview-results strong>span{color:var(--muted);font-size:12px}.area-preview #area-hint{color:var(--muted);margin:10px 0 16px;font-size:11px;line-height:1.6}.preview-lesson{border-top:1px solid var(--line);min-height:46px;color:var(--catalog-accent);justify-content:space-between;align-items:center;font-size:12px;display:flex}.preview-lesson:hover{text-underline-offset:4px;text-decoration:underline}.math-courses-section{border-top:1px solid var(--line);padding-top:38px;scroll-margin-top:24px}.catalog-heading{justify-content:space-between;align-items:end;gap:28px;margin-bottom:28px;display:flex}.catalog-heading .math-kicker{margin-bottom:10px}.catalog-heading h2{margin:0 0 10px;font-size:30px;line-height:1.25}.catalog-heading p:not(.math-kicker){color:var(--muted);margin:0;font-size:14px;line-height:1.7}.catalog-search{flex:0 322px;min-width:235px}.catalog-search>label{color:var(--muted);margin-bottom:9px;font-size:11px;display:block}.catalog-search>div{background:var(--catalog-surface);border:1px solid var(--line);border-radius:8px;align-items:center;gap:10px;padding-left:13px;display:flex}.catalog-search svg{color:var(--muted);flex-shrink:0}.catalog-search input[type=search]{color:inherit;background:0 0;border:0;border-radius:8px;min-width:0;min-height:46px;padding:13px 10px 13px 0;font-size:14px}.catalog-search #clear-search{border:0;border-left:1px solid var(--line);min-height:44px;color:var(--catalog-accent);cursor:pointer;background:0 0;border-radius:0 7px 7px 0;padding:0 12px;font-size:12px}.catalog-search-status{color:var(--muted);margin:0 0 18px;font-size:13px;line-height:1.7}.catalog-search-status:empty{margin:0}.course-catalog-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;display:grid}.course-tone-precalc{--course-color:#4746ad;--course-tint:#f1f0fa}.course-tone-single{--course-color:#1e7268;--course-tint:#eaf4f1}.course-tone-multi{--course-color:#905c22;--course-tint:#faf2e8}.course-tone-odes{--course-color:#865482;--course-tint:#f6edf5}[data-theme=dark] .course-tone-precalc{--course-color:#b8b6ff;--course-tint:#24253b}[data-theme=dark] .course-tone-single{--course-color:#85d4c7;--course-tint:#1b302e}[data-theme=dark] .course-tone-multi{--course-color:#e4b978;--course-tint:#332c22}[data-theme=dark] .course-tone-odes{--course-color:#d9abd3;--course-tint:#312535}.course-card{border:1px solid var(--line);background:var(--catalog-surface);border-radius:12px;flex-direction:column;min-width:0;padding:26px 28px 0;transition:border-color .15s,box-shadow .15s;display:flex;position:relative}.course-card:hover{color:inherit;border-color:var(--course-color);box-shadow:0 5px 18px #25244209}.course-card:hover .course-card-bottom strong{text-underline-offset:5px;text-decoration:underline}.course-card-top{height:48px;color:var(--course-color);align-items:center;gap:12px;margin-bottom:24px;padding-right:125px;font-size:11px;line-height:1.6;display:flex}.course-card-number{flex-shrink:0;font:italic 26px Georgia,serif}.course-mark{width:130px;height:82px;color:var(--course-color);flex-shrink:0}.mark-grid{stroke:var(--course-color);stroke-width:1px;opacity:.27}.course-card .course-mark{position:absolute;top:14px;right:20px}.course-card h3{margin:0 0 12px;font-size:25px;line-height:1.3}.course-card>p{color:var(--muted);max-width:400px;margin:0 0 24px;font-size:14px;line-height:1.75}.course-card-bottom{border-top:1px solid var(--line);min-height:61px;color:var(--muted);justify-content:space-between;align-items:center;gap:12px;margin-top:auto;font-size:11px;display:flex}.course-card-bottom>span>span{margin:0 5px}.course-card-bottom strong{white-space:nowrap;color:var(--course-color);font-size:12px;font-weight:600}.course-card-bottom strong>span{margin-left:9px}.catalog-results{border-top:1px solid var(--line);margin:0;padding:0;list-style:none}.catalog-results a{border-bottom:1px solid var(--line);border-radius:4px;justify-content:space-between;align-items:center;gap:16px;padding:19px 16px;display:flex}.catalog-results a:hover{background:var(--catalog-tint)}.catalog-results a>span:first-child{gap:9px;display:grid}.catalog-results small{color:var(--muted);font-size:11px;line-height:1.6}.catalog-results small span{margin:0 7px}.catalog-results strong{font-size:16px;font-weight:500;line-height:1.5}.catalog-results a>span:last-child{color:var(--catalog-accent)}.catalog-empty{background:var(--catalog-tint);border-radius:10px;padding:24px}.catalog-empty h3{margin:0 0 10px;font-size:20px}.catalog-empty p{color:var(--muted);margin:0;font-size:14px;line-height:1.7}.math-path-note{border:1px solid var(--line);background:var(--catalog-tint);border-radius:12px;align-items:center;gap:24px;margin:34px 0 0;padding:26px 28px;display:flex}.path-symbol{color:var(--catalog-accent);font:36px Georgia,serif}.math-path-note h2{letter-spacing:-.3px;margin:0 0 8px;font-size:18px}.math-path-note p{color:var(--muted);max-width:610px;margin:0;font-size:13px;line-height:1.75}.math-path-note>a{flex-shrink:0;margin-left:auto}.catalog-breadcrumb{color:var(--muted);justify-content:space-between;align-items:center;gap:20px;padding-top:25px;font-size:12px;display:flex}.catalog-breadcrumb a{color:var(--catalog-accent);align-items:center;min-height:44px;display:inline-flex}.math-course-hero{border-bottom:1px solid var(--line);grid-template-columns:1.6fr 1fr;align-items:center;gap:76px;padding:38px 0 48px;display:grid}.math-course-hero .math-kicker{color:var(--course-color);margin-bottom:16px}.math-course-hero h1{letter-spacing:-2px;text-wrap:balance;max-width:590px;margin-bottom:20px;font-size:clamp(40px,4.3vw,58px);line-height:1.13}.math-course-hero .math-intro{font-size:16px}.course-hero-count{color:var(--muted);font-size:12px}.course-outcomes{border-left:2px solid var(--course-color);flex-direction:column;justify-content:end;align-self:stretch;padding:84px 0 0 24px;display:flex;position:relative}.course-outcomes .course-mark{width:120px;height:76px;position:absolute;top:0;left:15px}.course-outcomes h2{letter-spacing:0;margin:12px 0;font-size:16px}.course-outcomes ul{gap:12px;margin:0;padding-left:16px;display:grid}.course-outcomes li{color:var(--muted);padding-left:4px;font-size:13px;line-height:1.6}.course-outcomes li::marker{color:var(--course-color)}.course-syllabus-layout{grid-template-columns:240px minmax(0,1fr);align-items:start;gap:64px;margin-top:42px;display:grid}.course-study-guide{color:var(--muted);padding:8px 0;font-size:13px;line-height:1.8}.course-study-guide .math-kicker{margin-bottom:14px}.course-study-guide>p:not(.math-kicker){margin:0 0 12px}.course-study-guide .math-text-link{align-items:flex-start;font-size:12px}.course-study-note{border-top:1px solid var(--line);margin-top:22px;padding-top:24px}.course-study-note h2{color:var(--catalog-accent);letter-spacing:-.2px;margin:0 0 12px;font-size:17px}.course-study-note p{margin:0 0 12px}.syllabus-heading{margin-bottom:25px}.syllabus-heading h2{margin:0 0 10px;font-size:25px;line-height:1.3}.syllabus-heading p{color:var(--muted);margin:0;font-size:13px}.syllabus-units{border-top:1px solid var(--line)}.syllabus-unit{border-bottom:1px solid var(--line);scroll-margin-top:20px}.syllabus-unit>summary{cursor:pointer;border-radius:6px;grid-template-columns:26px minmax(0,1fr) auto 20px;align-items:start;gap:16px;padding:24px 8px;list-style:none;display:grid}.syllabus-unit>summary::-webkit-details-marker{display:none}.syllabus-unit>summary:hover{background:var(--catalog-tint)}.syllabus-number{color:var(--course-color);font:italic 20px/1.3 Georgia,serif}.syllabus-unit-info{gap:8px;display:grid}.syllabus-unit-title{font-size:17px;font-weight:500;line-height:1.5}.syllabus-unit-summary{color:var(--muted);max-width:450px;font-size:12px;line-height:1.75}.syllabus-count{white-space:nowrap;color:var(--muted);font-size:11px;line-height:26px}.syllabus-toggle{color:var(--course-color);place-items:center;font-size:20px;line-height:26px;display:grid}.syllabus-toggle:after{content:"+"}.syllabus-unit[open] .syllabus-toggle:after{content:"−"}.syllabus-unit-body{padding:0 12px 20px 50px}.syllabus-reference{border:1px solid var(--line);background:var(--course-tint);color:var(--course-color);border-radius:7px;justify-content:space-between;align-items:center;gap:20px;margin-bottom:12px;padding:14px 16px;font-size:13px;line-height:1.6;display:flex}.syllabus-reference small{color:var(--muted);margin-top:3px;font-size:11px;display:block}.syllabus-reference:hover{color:var(--course-color);border-color:var(--course-color)}.syllabus-unit-body ol{margin:0;padding:0;list-style:none}.syllabus-unit-body li a{border-bottom:1px solid var(--line);align-items:center;gap:15px;min-height:48px;padding:14px 12px;font-size:14px;line-height:1.6;display:flex}.syllabus-unit-body li:last-child a{border-bottom:0}.syllabus-unit-body li a:hover{background:var(--catalog-tint);color:var(--catalog-accent)}.lesson-index{color:var(--muted);font-variant-numeric:tabular-nums;flex-shrink:0;font-size:10px}.lesson-arrow{color:var(--muted);margin-left:auto;padding-left:8px}.course-bottom-nav{border-top:1px solid var(--line);justify-content:space-between;align-items:center;gap:24px;margin-top:56px;padding-top:30px;display:flex}.course-bottom-nav>a:last-child:not(:first-child){text-align:right;color:var(--catalog-accent);gap:10px;padding:8px 0;display:grid}.course-bottom-nav small{color:var(--muted);letter-spacing:1px;font-size:9px}.course-bottom-nav strong{font-size:15px;font-weight:500;line-height:1.5}@media (width>=1500px){.math-home-hero{padding-top:80px;padding-bottom:76px}}@media (width<=1050px){.math-home-hero{gap:32px}.math-home-hero h1{font-size:58px}.math-hero-actions{gap:8px 16px}.math-course-hero{gap:38px}.course-syllabus-layout{grid-template-columns:200px minmax(0,1fr);gap:36px}.course-card-top{padding-right:105px}.course-card .course-mark{width:108px;right:16px}.course-card h3{font-size:23px}.course-card{padding:22px 22px 0}.math-path-note>a{flex-shrink:1;min-width:135px}}@media (width<=800px){.math-catalog{padding:0 24px}.math-home-hero{gap:24px}.math-home-hero h1{letter-spacing:-2px;font-size:48px}.math-intro{font-size:15px}.area-preview{padding:20px 18px 0}.preview-title{font-size:15px}.preview-control{grid-template-columns:105px 1fr;gap:8px}.preview-results>div+div{padding-left:12px}.preview-results strong>span{display:block}.catalog-heading{gap:20px}.catalog-heading h2{font-size:27px}.catalog-search{flex-basis:280px}.course-card-top{padding-right:90px;font-size:10px}.course-card .course-mark{width:92px;right:10px}.course-card h3{font-size:21px}.course-card-bottom{flex-direction:column;align-items:start;gap:10px;padding:16px 0}.math-path-note{align-items:start;gap:16px}.math-path-note>a{display:none}.math-course-hero{grid-template-columns:1.35fr 1fr;gap:30px}.math-course-hero h1{font-size:44px}.course-syllabus-layout{grid-template-columns:1fr;gap:30px}.course-study-guide{background:var(--catalog-tint);border-radius:8px;padding:20px}.course-study-guide .math-kicker{margin-bottom:8px}.course-study-note{display:none}}@media (width<=620px){.math-catalog{padding:0 22px}.math-home-hero{grid-template-columns:1fr;gap:32px;padding:36px 0}.math-home-hero h1{letter-spacing:-2px;margin-bottom:20px;font-size:53px}.math-kicker{margin-bottom:18px;font-size:9px}.math-intro{font-size:16px;line-height:1.75}.math-hero-actions{gap:8px 20px;margin-top:24px}.math-hero-note{gap:7px;margin-top:15px;font-size:10px}.area-preview{padding:20px 22px 0}.preview-title{font-size:17px}.area-preview svg{max-width:380px;margin-inline:auto}.preview-control{grid-template-columns:110px 1fr}.preview-results strong>span{display:inline}.catalog-heading{margin-bottom:24px;display:block}.catalog-heading h2{font-size:28px}.catalog-search{min-width:0;margin-top:24px}.catalog-search input[type=search]{font-size:16px}.math-courses-section{padding-top:30px}.course-catalog-grid{grid-template-columns:1fr;gap:16px}.course-card{padding:22px 22px 0}.course-card-top{margin-bottom:20px;padding-right:100px;font-size:11px}.course-card .course-mark{width:108px;right:12px}.course-card h3{font-size:24px}.course-card>p{margin-bottom:20px;font-size:14px}.course-card-bottom{flex-direction:row;align-items:center;gap:10px;min-height:58px;padding:0}.course-card-bottom>span{font-size:10px}.course-card-bottom strong{font-size:11px}.course-card-bottom strong>span{margin-left:4px}.math-path-note{gap:12px;margin-top:24px;padding:22px}.path-symbol{font-size:26px}.math-path-note h2{font-size:17px}.math-path-note p{font-size:13px}.catalog-results a{padding:18px 6px}.catalog-results strong{font-size:15px}.catalog-results small{font-size:10px}.catalog-breadcrumb{gap:12px;padding-top:15px;font-size:11px}.math-course-hero{grid-template-columns:1fr;gap:28px;padding:25px 0 30px}.math-course-hero h1{letter-spacing:-1.8px;font-size:43px}.math-course-hero .math-intro{font-size:16px}.math-course-hero .math-hero-actions{gap:18px}.course-outcomes{padding:0 0 0 20px}.course-outcomes .course-mark{display:none}.course-outcomes h2{margin:0 0 12px}.course-outcomes ul{gap:8px}.course-syllabus-layout{gap:28px;margin-top:26px}.syllabus-heading h2{font-size:24px}.syllabus-unit>summary{grid-template-columns:22px minmax(0,1fr) 18px;column-gap:12px;padding:22px 0;position:relative}.syllabus-unit-info{gap:7px}.syllabus-unit-title{font-size:16px}.syllabus-unit-summary{font-size:12px}.syllabus-count{grid-area:2/2;margin-top:7px;font-size:11px;line-height:1.5}.syllabus-toggle{grid-area:1/3}.syllabus-number{font-size:18px}.syllabus-unit-body{padding:0 0 15px}.syllabus-unit-body li a{gap:12px;padding:14px 6px;font-size:14px}.syllabus-reference{padding:13px}.course-bottom-nav{align-items:start;margin-top:35px;padding-top:20px}.course-bottom-nav strong{font-size:13px}.course-bottom-nav small{font-size:8px}.course-bottom-nav .math-text-link{font-size:12px}}@media (width<=360px){.math-catalog{padding-inline:18px}.math-home-hero h1{font-size:46px}.math-primary{gap:20px;padding:12px 15px;font-size:13px}.math-hero-actions{gap:4px 16px}.area-preview{padding-inline:16px}.preview-title{font-size:15px}.preview-results strong>span{font-size:10px}.course-card{padding-inline:18px}.course-card h3{font-size:22px}.course-card-top{padding-right:90px;font-size:10px}.course-card .course-mark{width:93px}.course-card-bottom strong{font-size:10px}.course-card-bottom>span>span{margin:0 2px}.math-course-hero h1{font-size:38px}}@media (prefers-reduced-motion:reduce){.course-card{transition:none}}@media print{.math-catalog{max-width:none}.catalog-search,.preview-control{display:none}.math-home-hero{padding:20px 0}.course-card,.area-preview{break-inside:avoid}.course-study-guide{display:none}.course-syllabus-layout{display:block}.syllabus-unit-body{display:block!important}.syllabus-unit{break-inside:avoid}}.syllabus-group h3{letter-spacing:0;color:var(--course-color);margin:24px 6px 6px;font-size:13px;font-weight:600;line-height:1.7}.syllabus-group:first-of-type h3{margin-top:20px}.course-tone-calculus-2{--course-color:#365f95;--course-tint:#edf3fb}.course-tone-linear-algebra{--course-color:#825222;--course-tint:#faf2e8}[data-theme=dark] .course-tone-calculus-2{--course-color:#a8c9ff;--course-tint:#202e42}[data-theme=dark] .course-tone-linear-algebra{--course-color:#edbc85;--course-tint:#35291f}