/*
Theme Name: Aljiyo Mathematics Journal
Theme URI: https://algeyo.com
Author: Aljiyo Editorial
Author URI: https://algeyo.com/about/
Description: 알지요 수학 저널을 위한 네이티브 WordPress 에디토리얼 테마입니다.
Version: 1.0.9
Requires at least: 6.4
Tested up to: 7.0
Requires PHP: 8.1
Text Domain: algeyo
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
*/

@font-face{font-family:"Pretendard Variable";src:url("assets/fonts/PretendardVariable-Algeyo.woff2") format("woff2");font-style:normal;font-weight:100 900;font-display:swap}
@font-face{font-family:"MaruBuri";src:url("assets/fonts/MaruBuri-Algeyo-SemiBold.woff2") format("woff2");font-style:normal;font-weight:600;font-display:swap}
@font-face{font-family:"STIX Two Math";src:url("assets/fonts/STIXTwoMath-Algeyo.woff2") format("woff2");font-style:normal;font-weight:400;font-display:swap}

:root{--paper:#f7f4ec;--paper-deep:#eeebe2;--white:#fffdf8;--ink:#121b22;--muted:#596268;--blue:#1f55b6;--line:#d8d4ca;--container:1280px}
*{box-sizing:border-box;font-synthesis:none}
html{scroll-behavior:smooth}
body{margin:0;overflow-x:hidden;background:var(--paper);color:var(--ink);font-family:"Pretendard Variable","Apple SD Gothic Neo","Noto Sans KR",sans-serif;font-size:16px;line-height:1.75;word-break:keep-all;overflow-wrap:break-word;-webkit-font-smoothing:antialiased}
body.admin-bar .site-header{top:32px}
img{max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid rgba(31,85,182,.36);outline-offset:5px}
.screen-reader-text{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link:focus{position:fixed;z-index:1000;top:16px;left:20px;width:auto;height:auto;margin:0;padding:11px 16px;overflow:visible;clip:auto;background:var(--ink);color:#fff;font-weight:700;white-space:normal}

/* Header */
.site-header{position:sticky;z-index:100;top:0;height:80px;border-bottom:1px solid rgba(18,27,34,.11);background:rgba(247,244,236,.95);backdrop-filter:blur(16px)}
.header-inner{width:min(var(--container),calc(100% - 64px));height:100%;margin:0 auto;display:flex;align-items:center;gap:38px}
.brand{position:relative;z-index:2;display:inline-flex;flex:0 0 auto;align-items:center;gap:11px}
.brand-mark{width:34px;height:34px;display:grid;place-items:center;background:var(--blue);color:#fff;font-family:"STIX Two Math",serif;font-size:22px;line-height:1;letter-spacing:-.07em}
.brand strong{font-size:20px;font-weight:700;line-height:24px;letter-spacing:-.035em}
.desktop-nav{margin-left:auto}
.desktop-nav .menu{margin:0;padding:0;display:flex;align-items:center;gap:30px;list-style:none}
.desktop-nav a,.header-tools a{position:relative;font-size:15px;font-weight:600;line-height:22px}
.desktop-nav a::after,.header-tools a::after{content:"";position:absolute;right:0;bottom:-8px;left:0;height:2px;background:var(--blue);transform:scaleX(0);transform-origin:right;transition:transform 180ms ease}
.desktop-nav a:hover::after,.header-tools a:hover::after,.current-menu-item>a::after{transform:scaleX(1);transform-origin:left}
.header-tools{display:flex;align-items:center;gap:24px;padding-left:24px;border-left:1px solid var(--line)}
.header-tools .search-link{display:inline-flex;align-items:center;gap:6px;color:var(--blue)}
.search-link svg,.search-box svg{fill:none;stroke:currentColor;stroke-linecap:round;stroke-width:1.8}
.search-link svg{width:16px;height:16px}
.mobile-menu{display:none}

/* Front page */
.hero{border-bottom:1px solid var(--line)}
.hero-inner{width:min(var(--container),calc(100% - 64px));min-height:680px;margin:0 auto;padding:96px 0 104px;display:grid;grid-template-columns:minmax(0,7fr) minmax(390px,5fr);align-items:center;gap:clamp(72px,8vw,132px)}
.kicker{margin:0;color:var(--blue);font-size:13px;font-weight:700;line-height:20px;letter-spacing:.04em}
.hero-copy{position:relative;padding-left:28px}
.hero-copy::before{content:"";position:absolute;top:8px;bottom:5px;left:0;width:2px;background:var(--blue)}
.hero h1{max-width:810px;margin:25px 0 0;font-family:"MaruBuri",serif;font-size:clamp(62px,5.8vw,84px);font-weight:600;line-height:1.15;letter-spacing:-.035em;text-wrap:balance}
.hero-description{max-width:620px;margin:34px 0 0;color:#48535b;font-size:20px;line-height:1.7;letter-spacing:-.018em;text-wrap:pretty}
.arrow-link{width:fit-content;margin-top:36px;padding-bottom:5px;display:inline-flex;align-items:center;gap:48px;border-bottom:1px solid var(--ink);font-size:15px;font-weight:700;line-height:24px}
.arrow-link span{color:var(--blue);transition:transform 180ms ease}.arrow-link:hover span{transform:translateX(4px)}
.hero-proof{position:relative;align-self:center;padding:58px 0 40px 42px}
.proof-line{position:absolute;top:0;left:0;width:176px;height:2px;background:var(--blue)}
.proof-line i{position:absolute;top:-4px;left:-5px;width:10px;height:10px;border-radius:50%;background:var(--blue)}
.proof-label{margin:0;color:var(--muted);font-size:12px;font-weight:700;line-height:18px;letter-spacing:.06em}
.hero-equation{margin:30px 0 0;font-family:"STIX Two Math","Times New Roman",serif;font-size:66px;line-height:1.05;white-space:nowrap}
.hero-equation span{color:var(--blue);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:7px}
.proof-caption{margin:34px 0 0;color:#39464f;font-family:"MaruBuri",serif;font-size:20px;font-weight:600;line-height:1.75;letter-spacing:-.02em}
.hero-proof>a{margin-top:30px;display:inline-flex;align-items:center;gap:22px;color:var(--muted);font-size:13px;font-weight:600}.hero-proof>a span{color:var(--blue)}
.section{width:min(var(--container),calc(100% - 64px));margin:0 auto;padding:136px 0}
.section-head{margin-bottom:64px;display:grid;grid-template-columns:86px 1fr;gap:32px}
.section-number{margin:3px 0 0;color:var(--blue);font-family:"STIX Two Math",serif;font-size:16px;line-height:24px}
.section-head h2{max-width:850px;margin:17px 0 0;font-family:"MaruBuri",serif;font-size:54px;font-weight:600;line-height:1.26;letter-spacing:-.025em;text-wrap:balance}
.path-list{border-top:1px solid var(--ink)}
.path-row{min-height:144px;padding:27px 12px 27px 0;display:grid;grid-template-columns:86px minmax(360px,1.25fr) minmax(270px,.8fr) 28px;align-items:center;gap:32px;border-bottom:1px solid var(--line);transition:background 180ms ease,padding 180ms ease}
.path-row:hover{padding-left:18px;background:rgba(255,253,248,.8)}
.path-index{color:var(--blue);font-family:"STIX Two Math",serif;font-size:16px}
.path-title h3{margin:0;font-family:"MaruBuri",serif;font-size:30px;font-weight:600;line-height:1.4;letter-spacing:-.03em}
.path-title p,.path-topics{margin:7px 0 0;color:var(--muted);font-size:15px;line-height:1.7}.path-topics{margin:0;font-size:13px;text-align:right}
.path-arrow,.recent-arrow{color:var(--blue);font-size:21px}
.feature{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--paper-deep)}
.feature-inner{width:min(var(--container),calc(100% - 64px));margin:0 auto;padding:136px 0 144px;display:grid;grid-template-columns:86px minmax(0,1.05fr) minmax(420px,.95fr);gap:32px 56px;align-items:center}
.feature-head{align-self:start}.feature-head .kicker{display:none}.feature-copy .article-category{margin:0 0 22px}
.article-category{color:var(--blue);font-size:12px;font-weight:700;line-height:20px}
.feature-copy h2{margin:0;font-family:"MaruBuri",serif;font-size:60px;font-weight:600;line-height:1.23;letter-spacing:-.025em;text-wrap:balance}
.feature-copy>p:not(.article-category){max-width:590px;margin:30px 0 0;color:#4b565d;font-size:17px;line-height:1.82;text-wrap:pretty}
.article-details{margin-top:24px;display:flex;flex-wrap:wrap;gap:8px 20px;color:var(--muted);font-size:12px;font-weight:600}.article-details span+span::before{content:"·";margin-right:18px}
.fraction-proof{position:relative;min-height:500px;padding:56px 0 44px 54px;display:flex;flex-direction:column;justify-content:center;border-left:2px solid var(--blue)}
.fraction-proof .note{margin-bottom:36px;color:var(--muted);font-size:12px;font-weight:700}
.fraction-row{display:flex;align-items:center;gap:24px;font-family:"STIX Two Math",serif;font-size:45px;line-height:1}
.stacked-fraction{min-width:54px;display:inline-grid;place-items:center;font-family:"STIX Two Math",serif;font-size:39px}.stacked-fraction b{font-weight:400}.stacked-fraction i{width:52px;height:1px;margin:6px 0 5px;background:currentColor}
.fraction-proof .turn{margin:24px 0 22px 104px;color:var(--blue);font-family:"STIX Two Math",serif;font-size:28px}.fraction-row.result{color:#39434a;font-size:34px}.fraction-row .answer{color:var(--blue)}
.fraction-proof>p{max-width:440px;margin:42px 0 0;padding-top:22px;border-top:1px solid var(--line);color:var(--muted);font-size:13px;line-height:1.75}
.recent-head{grid-template-columns:86px minmax(0,1fr) auto;align-items:end}.recent-head>a{margin-bottom:8px;padding-bottom:4px;display:inline-flex;gap:36px;border-bottom:1px solid var(--ink);font-size:14px;font-weight:700}.recent-head>a span{color:var(--blue)}
.recent-list{border-top:1px solid var(--ink)}
.recent-row{min-height:170px;padding:30px 12px 30px 0;display:grid;grid-template-columns:86px minmax(0,1fr) 180px 28px;align-items:center;gap:32px;border-bottom:1px solid var(--line)}
.recent-index{align-self:start;margin:2px 0 0;color:#5d666b;font-family:"STIX Two Math",serif;font-size:14px}.recent-copy .article-category{margin:0 0 8px}
.recent-copy h3{margin:0;font-family:"MaruBuri",serif;font-size:27px;font-weight:600;line-height:1.45;letter-spacing:-.025em;text-wrap:balance}.recent-copy h3 a:hover{color:var(--blue)}
.recent-copy>p:last-child{margin:8px 0 0;color:var(--muted);font-size:14px;line-height:1.7}.recent-meta{margin:0;color:var(--muted);font-size:12px;text-align:right}

/* Footer */
.site-footer{padding:100px 32px 30px;background:var(--ink);color:#c4c9cc}
.footer-inner{width:min(var(--container),100%);margin:0 auto;padding-bottom:80px;display:grid;grid-template-columns:1.15fr 1fr;gap:120px}
.footer-brand>a{display:inline-flex;align-items:center;gap:18px}.footer-mark{width:46px;height:46px;display:grid;place-items:center;background:var(--blue);color:#fff;font-family:"STIX Two Math",serif;font-size:29px;line-height:1;letter-spacing:-.07em}.footer-brand strong{color:#fff;font-family:"MaruBuri",serif;font-size:54px;font-weight:600;line-height:1.1;letter-spacing:-.045em}.footer-brand p{margin:32px 0 0;color:#8f999f;font-size:15px;line-height:1.85}
.footer-links{display:grid;grid-template-columns:repeat(3,1fr);gap:46px}.footer-links>div{display:grid;align-content:start;gap:10px}.footer-links h2{margin:0 0 12px;color:#fff;font-size:13px}.footer-links a{width:fit-content;color:#aeb6bb;font-size:14px;line-height:23px}.footer-links a:hover{color:#fff}
.footer-bottom{width:min(var(--container),100%);margin:0 auto;padding-top:25px;display:flex;justify-content:space-between;gap:24px;border-top:1px solid #303a41;color:#859097;font-size:11px;letter-spacing:.03em}.footer-bottom p{margin:0}

/* Archives and search */
.archive-page,.search-page{width:min(var(--container),calc(100% - 64px));margin:0 auto;padding:118px 0 140px}
.archive-header{max-width:900px;margin-bottom:76px;padding-left:28px;border-left:2px solid var(--blue)}
.archive-header>p{margin:0;color:var(--blue);font-size:13px;font-weight:700}.archive-header h1{margin:22px 0 0;font-family:"MaruBuri",serif;font-size:64px;font-weight:600;line-height:1.2;letter-spacing:-.03em;text-wrap:balance}.archive-header strong{max-width:680px;margin-top:25px;display:block;color:#4b565d;font-size:18px;font-weight:400;line-height:1.8}
.archive-list{border-top:1px solid var(--ink)}.archive-row{min-height:196px;padding:31px 10px 31px 0;display:grid;grid-template-columns:70px minmax(0,1fr) 140px 28px;align-items:center;gap:30px;border-bottom:1px solid var(--line)}
.archive-row>p{align-self:start;margin:2px 0 0;color:#737b7f;font-family:"STIX Two Math",serif;font-size:14px}.archive-row>div>span{color:var(--blue);font-size:12px;font-weight:700}.archive-row h2{margin:8px 0 0;font-family:"MaruBuri",serif;font-size:28px;font-weight:600;line-height:1.45;letter-spacing:-.025em;text-wrap:balance}.archive-row h2 a:hover{color:var(--blue)}.archive-row>div>p{max-width:780px;margin:9px 0 0;color:var(--muted);font-size:14px;line-height:1.7}.archive-row>aside{display:grid;gap:5px;color:var(--muted);font-size:12px;text-align:right}.archive-row>a{color:var(--blue);font-size:21px}
.navigation.pagination{margin-top:50px}.nav-links{display:flex;gap:8px}.page-numbers{min-width:42px;height:42px;padding:0 10px;display:grid;place-items:center;border:1px solid var(--line);font-size:13px}.page-numbers.current,.page-numbers:hover{background:var(--blue);border-color:var(--blue);color:#fff}
.search-page .archive-header{margin-bottom:55px}.search-box{max-width:860px;display:block}.search-box>label{display:block;margin-bottom:10px;color:var(--muted);font-size:12px;font-weight:700}.search-box>div{height:70px;display:flex;align-items:center;gap:15px;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}.search-box svg{width:21px;height:21px;flex:0 0 auto;color:var(--blue)}.search-box input{width:100%;border:0;outline:0;background:transparent;color:var(--ink);font-size:19px}.search-box input::placeholder{color:#878d90}.search-box button{height:40px;padding:0 15px;border:0;background:transparent;color:var(--blue);font-weight:700;cursor:pointer}.search-status{margin:50px 0 15px;color:var(--muted);font-size:13px}.search-results{max-width:960px;border-top:1px solid var(--line)}.search-results article{padding:30px 0;border-bottom:1px solid var(--line)}.search-results article>p{margin:0;color:var(--blue);font-size:11px;font-weight:700}.search-results h2{margin:8px 0 0;font-family:"MaruBuri",serif;font-size:25px;font-weight:600;line-height:1.5}.search-results h2 a:hover{color:var(--blue)}.search-results article>span{max-width:760px;margin-top:7px;display:block;color:var(--muted);font-size:14px;line-height:1.7}.empty-search{padding:50px 0}.empty-search strong{font-family:"MaruBuri",serif;font-size:24px}.empty-search p{color:var(--muted)}.empty-search a{color:var(--blue);font-weight:700}

/* Single post */
.post{padding:116px 0 0}.post-header{width:min(940px,calc(100% - 64px));margin:0 auto}.breadcrumb{display:flex;gap:10px;color:var(--muted);font-size:12px;font-weight:600}.breadcrumb span{color:var(--muted)}.post-topic{margin:62px 0 0;color:var(--blue);font-size:13px;font-weight:700}.post-header h1{margin:22px 0 0;font-family:"MaruBuri",serif;font-size:58px;font-weight:600;line-height:1.24;letter-spacing:-.03em;text-wrap:balance}.post-description{max-width:760px;margin:28px 0 0;color:#4e5a61;font-size:19px;line-height:1.78;text-wrap:pretty}.post-meta{margin-top:28px;display:flex;flex-wrap:wrap;gap:8px 22px;color:var(--muted);font-size:12px;font-weight:600}.post-meta span+span::before{content:"·";margin-right:18px}.post-hero-image{width:min(1120px,calc(100% - 64px));margin:76px auto 0}.post-hero-image img{width:100%;height:auto;aspect-ratio:16/9;display:block;object-fit:cover;background:var(--paper-deep)}.post-hero-image figcaption{margin-top:10px;color:var(--muted);font-size:11px;text-align:right}
.post-layout{width:min(1120px,calc(100% - 64px));margin:98px auto 0;padding-bottom:144px;display:grid;grid-template-columns:230px minmax(0,720px);justify-content:space-between;gap:80px}.post-aside{position:sticky;top:112px;align-self:start;padding-top:22px;border-top:2px solid var(--blue)}.post-aside>p{margin:0;color:var(--blue);font-size:11px;font-weight:700}.post-aside>strong{margin-top:10px;display:block;font-family:"MaruBuri",serif;font-size:18px;font-weight:600;line-height:1.65}.post-aside>div{margin-top:30px;padding-top:15px;border-top:1px solid var(--line)}.post-aside>div span{display:block;color:var(--muted);font-size:10px;font-weight:700}.post-aside>div a,.post-aside>div p{margin:5px 0 0;color:#505b62;font-size:12px;line-height:1.7}
.post-body{width:100%;font-size:18px;line-height:1.82}.post-body p{margin:0;text-wrap:pretty}.post-body p+p{margin-top:20px}.post-intro>p:first-of-type::first-letter{float:left;margin:9px 10px 0 0;color:var(--blue);font-family:"MaruBuri",serif;font-size:57px;line-height:.75}.post-body h2{margin:92px 0 30px;font-family:"MaruBuri",serif;font-size:35px;font-weight:600;line-height:1.36;letter-spacing:-.025em;text-wrap:balance}.post-body h3{margin:52px 0 18px;font-family:"MaruBuri",serif;font-size:24px;font-weight:600;line-height:1.5}.post-body ul,.post-body ol{margin:27px 0 0;padding-left:24px}.post-body li{padding-left:6px;margin-top:9px}.post-body a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}.post-body blockquote{margin:42px 0;padding:25px 28px;border-left:3px solid var(--blue);background:var(--white);font-family:"MaruBuri",serif;font-size:21px;line-height:1.65}.post-body figure{margin:42px 0}.post-body figcaption{margin-top:9px;color:var(--muted);font-size:12px}.post-body table{width:100%;margin:38px 0;border-collapse:collapse;font-size:15px}.post-body th,.post-body td{padding:13px;border:1px solid var(--line);text-align:left}.post-body th{background:var(--paper-deep)}.post-body pre{max-width:100%;padding:20px;overflow:auto;background:var(--ink);color:#fff}.post-body code{font-family:"STIX Two Math",monospace}
.key-question{margin-top:46px;padding:25px 28px 26px;border-left:3px solid var(--blue);background:var(--white)}.key-question>span,.key-question>strong{color:var(--blue);font-size:11px;font-weight:700}.key-question>p{margin-top:6px;font-family:"MaruBuri",serif;font-size:21px;font-weight:600;line-height:1.65}
.article-equation{margin:35px 0;padding:36px 24px;overflow-x:auto;border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--blue);font-family:"STIX Two Math",serif;font-size:36px;line-height:1.35;text-align:center;white-space:pre-wrap}.concept-note{margin:34px 0;padding:25px 28px;background:var(--paper-deep)}.concept-note b,.concept-note>strong{color:var(--blue);font-size:12px}.concept-note p{margin-top:7px;color:#48545b;font-size:16px;line-height:1.75}.worked-example{margin-top:42px;padding:32px 34px;border:1px solid var(--line);background:var(--white)}.example-label{color:var(--blue);font-size:11px;font-weight:700}.worked-example h3{margin:10px 0 0;font-size:21px}.worked-example ol{font-size:16px}.example-answer,.example-check{margin-top:22px!important;padding-top:16px;border-top:1px solid var(--line);font-size:16px}.summary-box{margin-top:92px;padding:40px 42px;background:var(--blue);color:#fff}.summary-box h2{margin-top:0;color:#fff}.summary-box a{color:#fff}.practice,.post-faq,.post-sources{margin-top:92px}.practice-item{padding:27px 0;border-top:1px solid var(--line)}.practice-item:last-child{border-bottom:1px solid var(--line)}.practice details,.post-faq details{margin-top:17px}.practice summary,.post-faq summary{cursor:pointer;font-weight:700}.post-faq details{margin:0;padding:22px 0;border-top:1px solid var(--line)}.post-faq details:last-child{border-bottom:1px solid var(--line)}.post-sources{padding-top:38px;border-top:1px solid var(--line)}.post-sources h2{margin:0 0 24px;font-size:25px}.post-sources ul{margin:0;padding:0;list-style:none}.post-sources li+li{margin-top:20px}.post-sources li p{margin-top:4px;color:var(--muted);font-size:12px}.post-editorial-note{margin-top:55px;padding-top:22px;border-top:1px solid var(--line);color:var(--muted);font-size:12px}.page-links{margin-top:40px}
.word-model{margin:38px 0 42px;padding:30px;border:1px solid var(--line);background:var(--white)}.word-model p:empty{display:none!important}.word-model figcaption{margin:0 0 22px;display:grid;gap:5px;color:var(--ink);font-size:17px;text-align:left}.word-model figcaption span,.word-model__sentence>span,.word-model__result>span{color:var(--blue);font-size:11px;font-weight:700;letter-spacing:.04em}.word-model figcaption strong{font-family:"MaruBuri",serif;font-size:20px;font-weight:600;line-height:1.55}.word-model__sentence{padding:18px 20px;display:grid;grid-template-columns:40px minmax(0,1fr);gap:14px;background:var(--paper-deep)}.word-model__sentence p{font-size:15px;line-height:1.65}.word-model__result{margin-top:22px;padding-top:18px;display:flex;align-items:baseline;justify-content:space-between;gap:22px;border-top:1px solid var(--line)}.word-model__result strong{color:var(--blue);font-family:"STIX Two Math","Pretendard Variable",sans-serif;font-size:22px;font-weight:500;text-align:right}.segment-model{margin-top:26px;display:grid;gap:16px}.segment-row{display:grid;grid-template-columns:28px minmax(0,1fr);align-items:center;gap:12px}.segment-row>b{color:var(--blue);font-family:"STIX Two Math",serif;font-size:17px}.segment-track{display:flex;align-items:stretch}.segment-unit,.segment-extra{min-width:29%;height:48px;display:grid;place-items:center;border:1px solid var(--blue);background:rgba(31,85,182,.1);color:var(--blue);font-family:"STIX Two Math",serif;font-size:18px}.segment-unit+.segment-unit,.segment-extra{border-left:0}.segment-extra{min-width:14%;border-style:dashed;background:var(--paper-deep);color:var(--ink)}.word-model__table-wrap{margin-top:24px;overflow-x:auto}.word-model table{min-width:520px;margin:0;font-size:14px}.word-model th,.word-model td{padding:12px 10px;text-align:center}.word-model thead th{background:var(--ink);color:#fff}.word-model tbody th{color:var(--blue)}.fraction-model{margin-top:26px}.fraction-total{margin-bottom:8px;color:var(--blue);font-size:13px;font-weight:700;text-align:center}.fraction-track{display:grid;grid-template-columns:repeat(5,1fr)}.fraction-track span{min-width:0;height:66px;display:grid;place-items:center;border:1px solid var(--blue);color:var(--ink);font-size:12px;font-weight:700}.fraction-track span+span{border-left:0}.fraction-track .is-used{background:var(--blue);color:#fff}.fraction-track .is-left{background:rgba(31,85,182,.08)}.fraction-labels{display:grid;grid-template-columns:2fr 3fr;color:var(--muted);font-size:12px;font-weight:700;text-align:center}.fraction-labels span{padding-top:8px}
.related-articles{padding:120px max(32px,calc((100% - var(--container))/2));display:grid;grid-template-columns:minmax(300px,.7fr) minmax(500px,1.3fr);gap:100px;border-top:1px solid var(--line);background:var(--paper-deep)}.related-articles h2{margin:17px 0 0;font-family:"MaruBuri",serif;font-size:42px;font-weight:600;line-height:1.35}.related-list{border-top:1px solid var(--ink)}.related-list a{min-height:112px;padding:22px 2px;display:grid;grid-template-columns:100px 1fr 24px;align-items:center;gap:18px;border-bottom:1px solid var(--line)}.related-list span{color:var(--blue);font-size:11px;font-weight:700}.related-list strong{font-family:"MaruBuri",serif;font-size:20px;font-weight:600;line-height:1.5}.related-list i{color:var(--blue);font-size:18px;font-style:normal}

/* Trust pages and 404 */
.trust-page{width:min(1080px,calc(100% - 64px));margin:0 auto;padding:118px 0 150px}.trust-page-header{max-width:880px;padding:0 0 76px 28px;border-left:2px solid var(--blue)}.trust-page-header>p{margin:0;color:var(--blue);font-size:12px;font-weight:700}.trust-page-header h1{margin:22px 0 0;font-family:"MaruBuri",serif;font-size:58px;font-weight:600;line-height:1.25;letter-spacing:-.03em}.trust-page-header strong{max-width:720px;margin-top:27px;display:block;color:#4b565d;font-size:19px;font-weight:400;line-height:1.8}.trust-page-body{max-width:720px;margin-left:auto}.trust-page-body h2{margin:0;padding-top:64px;border-top:1px solid var(--line);font-family:"MaruBuri",serif;font-size:32px;font-weight:600;line-height:1.4}.trust-page-body h2:not(:first-child){margin-top:64px}.trust-page-body h2+p{margin-top:28px}.trust-page-body p,.trust-page-body li{font-size:17px;line-height:1.85}.trust-page-body p+p{margin-top:20px}.trust-page-body ul{margin:24px 0 0;padding-left:24px}.trust-page-body a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}.trust-links{margin-top:24px;display:flex;flex-wrap:wrap;gap:12px 24px}.trust-links a{font-size:14px;font-weight:700}
.not-found-page{width:min(900px,calc(100% - 40px));min-height:720px;margin:0 auto;padding:120px 0;display:grid;align-content:center}.not-found-page>p{margin:0;color:var(--blue);font-family:"STIX Two Math",serif;font-size:18px}.not-found-page h1{margin:22px 0 0;font-family:"MaruBuri",serif;font-size:62px;font-weight:600;line-height:1.25}.not-found-page>strong{max-width:600px;margin-top:22px;color:var(--muted);font-size:17px;font-weight:400}.not-found-page .search-box{margin-top:45px}.not-found-page>a{width:fit-content;margin-top:36px;padding-bottom:4px;border-bottom:1px solid var(--ink);font-weight:700}

.post-body{min-width:0}

@media(max-width:1120px){.desktop-nav .menu{gap:20px}.header-tools>a:first-child{display:none}.hero-inner{grid-template-columns:minmax(0,1.2fr) minmax(330px,.8fr);gap:54px}.hero h1{font-size:62px}.hero-equation{font-size:55px}.feature-inner{grid-template-columns:60px minmax(0,1fr) minmax(360px,.9fr);gap:30px}.feature-copy h2{font-size:50px}}

@media(max-width:880px){body.admin-bar .site-header{top:46px}.site-header{height:64px}.header-inner,.hero-inner,.section,.feature-inner{width:calc(100% - 40px)}.brand-mark{width:32px;height:32px}.brand strong{font-size:18px}.desktop-nav,.header-tools{display:none}.mobile-menu{position:static;margin-left:auto;display:block}.mobile-menu summary{width:40px;height:40px;padding:0;display:grid;place-content:center;gap:6px;cursor:pointer;list-style:none}.mobile-menu summary::-webkit-details-marker{display:none}.mobile-menu summary span{width:22px;height:1px;display:block;background:var(--ink)}.mobile-menu[open] summary span:first-child{transform:translateY(3.5px) rotate(45deg)}.mobile-menu[open] summary span:last-child{transform:translateY(-3.5px) rotate(-45deg)}.mobile-sheet{position:absolute;top:64px;right:0;left:0;min-height:calc(100vh - 64px);padding:34px 20px 48px;border-top:1px solid var(--line);background:var(--paper)}.mobile-sheet nav{display:grid;border-top:1px solid var(--ink)}.mobile-sheet nav a{min-height:66px;padding:18px 4px;display:flex;align-items:center;gap:20px;border-bottom:1px solid var(--line);font-family:"MaruBuri",serif;font-size:22px;font-weight:600}.mobile-sheet nav a span{color:var(--blue);font-family:"STIX Two Math",serif;font-size:12px}.mobile-search{margin-top:32px;padding-bottom:8px;display:flex;justify-content:space-between;border-bottom:1px solid var(--ink);font-size:14px;font-weight:700}.mobile-search span{color:var(--blue)}.hero-inner{min-height:0;padding:80px 0 90px;grid-template-columns:1fr;gap:80px}.hero-proof{max-width:560px;margin-left:auto}.section{padding:104px 0}.path-row{grid-template-columns:58px minmax(0,1fr) 28px}.path-topics{display:none}.feature-inner{padding:104px 0;grid-template-columns:58px 1fr}.fraction-proof{grid-column:1/-1;width:min(600px,calc(100% - 58px));margin:48px 0 0 58px}.recent-head{grid-template-columns:58px 1fr}.recent-head>a{grid-column:2;justify-self:start;margin-top:20px}.recent-row{grid-template-columns:58px minmax(0,1fr) 28px}.recent-meta{display:none}.footer-inner{grid-template-columns:1fr;gap:70px}.archive-page,.search-page,.trust-page{width:calc(100% - 40px);padding:88px 0 110px}.post{padding-top:82px}.post-header,.post-hero-image,.post-layout{width:calc(100% - 40px)}.post-layout{margin-top:72px;grid-template-columns:1fr}.post-aside{position:static;padding:20px 0;display:grid;grid-template-columns:1fr 1fr;gap:12px 30px;border-bottom:1px solid var(--line)}.post-aside>strong{grid-column:1/-1}.post-aside>div{margin-top:8px}.related-articles{padding:92px 20px;grid-template-columns:1fr;gap:52px}}

@media(max-width:600px){.hero-inner{min-height:700px;padding:58px 0 64px;display:block}.hero-copy{padding-left:18px}.kicker{font-size:11px}.hero h1{margin-top:18px;font-size:clamp(39px,10.7vw,44px);line-height:1.23;letter-spacing:-.035em}.hero-description{margin-top:24px;font-size:16px;line-height:1.78}.arrow-link{margin-top:25px;gap:36px;font-size:14px}.hero-proof{margin:61px 0 0 18px;padding:32px 0 0}.proof-line{width:112px}.proof-label{font-size:11px}.hero-equation{margin-top:18px;font-size:42px}.proof-caption{margin-top:18px;font-size:16px;line-height:1.65}.hero-proof>a{display:none}.section{padding:86px 0}.section-head,.recent-head{margin-bottom:40px;display:block}.section-number{margin-bottom:21px;font-size:13px}.section-head h2{margin-top:12px;font-size:36px;line-height:1.28}.path-row{min-height:156px;padding:25px 4px 25px 0;grid-template-columns:36px minmax(0,1fr) 22px;gap:10px}.path-row:hover{padding-left:0;background:transparent}.path-index{align-self:start;margin-top:5px;font-size:13px}.path-title h3{font-size:24px}.path-title p{margin-top:9px;font-size:14px}.feature-inner{padding:86px 0 94px;display:block}.feature-head .kicker{display:block;margin-bottom:20px}.feature-copy h2{font-size:40px;line-height:1.27}.feature-copy>p:not(.article-category){font-size:16px}.fraction-proof{width:100%;min-height:390px;margin:58px 0 0;padding:40px 0 32px 24px}.fraction-row{gap:16px;font-size:34px}.stacked-fraction{min-width:42px;font-size:29px}.stacked-fraction i{width:40px}.fraction-proof .turn{margin:19px 0 17px 77px}.fraction-row.result{gap:11px;font-size:27px}.recent-head>a{margin-top:25px}.recent-row{padding:28px 2px 30px 0;grid-template-columns:34px minmax(0,1fr) 22px;gap:10px}.recent-copy h3{font-size:23px}.site-footer{padding:76px 20px 28px}.footer-inner{padding-bottom:62px;gap:58px}.footer-mark{width:40px;height:40px;font-size:25px}.footer-brand strong{font-size:42px}.footer-links{grid-template-columns:1fr 1fr;gap:42px 24px}.footer-policy{grid-column:1/-1;padding-top:32px;border-top:1px solid #303a41}.footer-bottom{display:grid;gap:6px}.archive-page,.search-page,.trust-page{padding:72px 0 90px}.archive-header,.trust-page-header{margin-bottom:48px;padding:0 0 46px 18px}.archive-header h1,.trust-page-header h1{margin-top:17px;font-size:40px;line-height:1.28}.archive-header strong,.trust-page-header strong{font-size:16px}.archive-row{min-height:0;padding:28px 2px 30px 0;grid-template-columns:30px minmax(0,1fr) 22px;gap:10px}.archive-row>aside{display:none}.archive-row h2{font-size:23px}.archive-row>div>p{font-size:13px}.search-box>div{height:62px}.search-box input{font-size:17px}.search-results article{padding:27px 0}.search-results h2{font-size:23px}.post{padding-top:68px}.post-topic{margin-top:44px}.post-header h1{font-size:39px;line-height:1.28}.post-description{font-size:16px}.post-hero-image{margin-top:50px}.post-hero-image figcaption{text-align:left}.post-layout{margin-top:58px;padding-bottom:96px}.post-aside{display:block}.post-aside>div{margin-top:22px}.post-body{font-size:17px;line-height:1.72}.post-intro>p:first-of-type::first-letter{font-size:48px}.post-body h2{margin-top:72px;font-size:29px}.post-body h3{font-size:21px}.key-question{padding:21px 18px}.article-equation{padding:28px 8px;font-size:clamp(21px,6.2vw,26px);line-height:1.55}.worked-example{padding:27px 19px}.summary-box{padding:32px 23px}.related-articles h2{font-size:35px}.related-list a{grid-template-columns:1fr 22px}.related-list span{grid-column:1/-1}.trust-page-body{margin-left:0}.trust-page-body h2{padding-top:46px;font-size:28px}.trust-page-body h2:not(:first-child){margin-top:46px}.trust-page-body p,.trust-page-body li{font-size:16px}.not-found-page{min-height:620px;padding:82px 0}.not-found-page h1{font-size:42px}.not-found-page>strong{font-size:16px}}

@media(max-width:600px){.word-model{margin:30px 0 34px;padding:22px 18px}.word-model figcaption strong{font-size:18px}.word-model__sentence{padding:15px;display:block}.word-model__sentence p{margin-top:5px;font-size:14px}.word-model__result{display:grid;gap:6px}.word-model__result strong{font-size:19px;text-align:left}.word-model table{min-width:0;font-size:11px}.word-model th,.word-model td{padding:9px 4px}.segment-row{grid-template-columns:22px minmax(0,1fr);gap:8px}.segment-unit,.segment-extra{height:42px;font-size:15px}.fraction-track span{height:54px;font-size:10px}}

@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}