/*
Theme Name: OnTrick Maths Notebook Solutions
Theme URI: https://ontrick.xyz/
Author: OnTrick Maths
Description: Fast WordPress maths publishing theme with a static Home page, real Blog posts, category archives, guides and calculators.
Version: 1.4.0
Requires at least: 6.0
Requires PHP: 7.4
Text Domain: ontrick-maths-static
*/

:root{--bg:#f7f9fc;--card:#ffffff;--text:#152036;--muted:#60708a;--line:#dfe6f0;--brand:#155eef;--brand2:#0b47bd;--soft:#eaf1ff;--good:#087a55;--warn:#9a5b00;--shadow:0 10px 35px rgba(25,42,70,.08);--radius:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.68}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}img,svg{max-width:100%;height:auto}code,.formula{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:#f2f5fa;border:1px solid var(--line);padding:.14rem .38rem;border-radius:7px}.wrap{width:min(1120px,92vw);margin:auto}.topbar{background:#0f172a;color:#e5ecf8;font-size:.9rem}.topbar .wrap{display:flex;justify-content:space-between;gap:1rem;padding:.45rem 0;flex-wrap:wrap}.site-header{background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(9px)}.nav{display:flex;align-items:center;justify-content:space-between;gap:1.2rem;min-height:72px}.brand{display:flex;align-items:center;gap:.7rem;font-weight:900;color:var(--text);font-size:1.2rem;text-decoration:none}.mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(145deg,var(--brand),#58a6ff);display:grid;place-items:center;color:#fff;font-weight:900;box-shadow:0 7px 18px rgba(21,94,239,.22)}.navlinks{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}.navlinks a{color:#33415d;font-weight:700;font-size:.95rem}.cta{display:inline-flex;align-items:center;justify-content:center;background:var(--brand);color:#fff!important;padding:.72rem 1rem;border-radius:11px;font-weight:800;box-shadow:0 7px 18px rgba(21,94,239,.17)}.cta:hover{background:var(--brand2);text-decoration:none}.hero{padding:64px 0 40px;background:radial-gradient(circle at 80% 0,#dce9ff,transparent 36%),linear-gradient(180deg,#fff,#f7f9fc)}.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center}.eyebrow{font-weight:900;color:var(--brand);text-transform:uppercase;letter-spacing:.08em;font-size:.78rem}.hero h1,.article h1{font-size:clamp(2.2rem,5vw,4.15rem);line-height:1.05;letter-spacing:-.045em;margin:.55rem 0 1rem}.hero p{font-size:1.16rem;color:var(--muted);max-width:720px}.actions{display:flex;gap:.8rem;flex-wrap:wrap;margin:1.4rem 0}.ghost{display:inline-flex;align-items:center;justify-content:center;border:1px solid #b9c8df;background:#fff;color:#253651;padding:.72rem 1rem;border-radius:11px;font-weight:800}.ghost:hover{text-decoration:none;border-color:#8aa5cc}.hero-card{background:#0f172a;color:#fff;border-radius:24px;padding:28px;box-shadow:var(--shadow)}.hero-card h2{margin-top:0}.mini-step{display:grid;grid-template-columns:34px 1fr;gap:10px;margin:16px 0}.num{width:31px;height:31px;border-radius:50%;display:grid;place-items:center;background:#2a6df4;font-weight:900}.mini-step p{margin:0;color:#d7e1f1;font-size:.98rem}.section{padding:46px 0}.section h2{font-size:clamp(1.6rem,3vw,2.45rem);line-height:1.15;letter-spacing:-.025em;margin:.2rem 0 .8rem}.lead{color:var(--muted);max-width:760px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:24px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 5px 20px rgba(25,42,70,.04)}.card h3{margin:.35rem 0 .55rem;font-size:1.18rem}.card p{color:var(--muted);margin:.35rem 0}.icon{width:42px;height:42px;border-radius:12px;background:var(--soft);display:grid;place-items:center;color:var(--brand);font-weight:900}.tag{display:inline-block;background:#edf4ff;color:#174ca8;border:1px solid #d6e5ff;padding:.2rem .56rem;border-radius:999px;font-size:.76rem;font-weight:800}.content-shell{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:34px;align-items:start}.article{background:#fff;border:1px solid var(--line);border-radius:24px;padding:clamp(22px,4vw,46px);box-shadow:var(--shadow)}.article h1{font-size:clamp(2.1rem,4.4vw,3.6rem)}.article h2{margin-top:2.2rem;font-size:1.75rem;line-height:1.2;letter-spacing:-.02em}.article h3{margin-top:1.5rem}.article p,.article li{font-size:1.03rem}.article-meta{display:flex;gap:.8rem;flex-wrap:wrap;color:var(--muted);font-size:.9rem;margin-bottom:1.2rem}.breadcrumbs{font-size:.9rem;color:var(--muted);margin-bottom:1.1rem}.note,.tip,.warning,.worked{border-radius:14px;padding:16px 18px;margin:1.15rem 0}.note{background:#f3f7ff;border:1px solid #d9e6ff}.tip{background:#ecfbf5;border:1px solid #c5efdf}.warning{background:#fff7e8;border:1px solid #f0d9aa}.worked{background:#fbfcfe;border:1px solid var(--line)}.worked strong{color:#21324e}.steps{counter-reset:step;list-style:none;padding:0}.steps li{counter-increment:step;position:relative;padding:0 0 1.1rem 44px}.steps li:before{content:counter(step);position:absolute;left:0;top:0;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:var(--brand);color:#fff;font-weight:900}.toc{position:sticky;top:96px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:19px}.toc h3{margin-top:0}.toc a{display:block;padding:.38rem 0;color:#42526d;font-size:.92rem}.answer{font-weight:900;color:var(--good)}.equation{overflow:auto;padding:14px 16px;background:#0f172a;color:#f7fbff;border-radius:12px;font:600 1rem/1.7 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;margin:1rem 0;background:#fff}th,td{border:1px solid var(--line);padding:.72rem;text-align:left}th{background:#f4f7fb}.tool{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px;box-shadow:var(--shadow)}.tool-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.field label{display:block;font-weight:800;margin-bottom:.35rem}.field input,.field select,.field textarea{width:100%;padding:.75rem .8rem;border:1px solid #bfcce0;border-radius:10px;background:#fff;font:inherit}.tool button{border:0;background:var(--brand);color:#fff;padding:.8rem 1rem;border-radius:10px;font-weight:900;cursor:pointer}.result{margin-top:15px;padding:14px;border-radius:12px;background:#eef5ff;border:1px solid #d4e4ff;min-height:52px}.quiz{margin-top:1.5rem;padding:20px;border:1px solid var(--line);border-radius:16px;background:#fbfcfe}.quiz button{margin-top:.6rem}.footer{margin-top:54px;background:#0f172a;color:#d5deec}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px;padding:42px 0}.footer h3{color:#fff}.footer a{color:#cbd8ef;display:block;padding:.24rem 0}.footer-bottom{border-top:1px solid #26344b;padding:16px 0;font-size:.9rem;color:#aebbd0}.search-box{display:flex;gap:8px}.search-box input{flex:1;padding:.8rem;border:1px solid #bfcce0;border-radius:10px}.kicker{font-size:.92rem;color:var(--muted)}.pill-row{display:flex;gap:.5rem;flex-wrap:wrap}.math-diagram{display:block;margin:1rem auto;background:#fff;border:1px solid var(--line);border-radius:16px;padding:10px}.muted{color:var(--muted)}.checklist{padding-left:1.1rem}.checklist li{margin:.45rem 0}.article-list{display:grid;gap:14px;margin-top:20px}.article-row{display:flex;justify-content:space-between;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:15px;padding:18px}.article-row h3{margin:0 0 .25rem}.article-row p{margin:0;color:var(--muted)}
@media(max-width:900px){.hero-grid,.content-shell{grid-template-columns:1fr}.grid{grid-template-columns:1fr 1fr}.toc{position:static}.navlinks{display:none}.footer-grid{grid-template-columns:1fr 1fr}.hero{padding-top:44px}}@media(max-width:640px){.grid,.tool-grid,.footer-grid{grid-template-columns:1fr}.article-row{align-items:flex-start;flex-direction:column}.hero h1{font-size:2.55rem}.article{border-radius:0;border-left:0;border-right:0}.content-shell{width:100%}.wrap.article-wrap{width:100%}}

.admin-bar .site-header{top:32px}@media(max-width:782px){.admin-bar .site-header{top:46px}}

/* Blog */
.blog-hero{padding:58px 0 34px;background:radial-gradient(circle at 82% 0,#e5efff,transparent 34%),#fff;border-bottom:1px solid var(--line)}
.blog-hero h1{font-size:clamp(2.2rem,4.7vw,3.9rem);line-height:1.06;letter-spacing:-.04em;margin:.55rem 0 1rem;max-width:900px}
.blog-hero p{max-width:760px;color:var(--muted);font-size:1.08rem}
.topic-pill{display:inline-flex;padding:.5rem .78rem;background:#fff;border:1px solid #cbd7e8;border-radius:999px;font-weight:800;color:#33415d}
.topic-pill:hover{text-decoration:none;border-color:#8da9d0}
.post-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:24px}
.post-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:0 5px 20px rgba(25,42,70,.04);display:flex;flex-direction:column;min-height:100%}
.post-card h2,.post-card h3{margin:.5rem 0 .65rem;line-height:1.25;letter-spacing:-.015em}
.post-card h2{font-size:1.3rem}.post-card h3{font-size:1.18rem}
.post-card h2 a,.post-card h3 a{color:var(--text)}
.post-card p{color:var(--muted);margin:.2rem 0 1rem}
.post-card-meta{font-size:.82rem;color:var(--muted);font-weight:700}
.post-card-meta a{color:#4c6080}
.read-more{font-weight:900;margin-top:auto}
.section-heading-row{display:flex;justify-content:space-between;gap:24px;align-items:end}
.latest-posts{border-top:1px solid var(--line)}
.blog-article h1{font-size:clamp(2.2rem,4.4vw,3.7rem);margin:.7rem 0 1rem}
.blog-article>p:first-of-type{font-size:1.14rem;color:#43516a}
.blog-article .equation{margin:1rem 0}
.post-end{margin-top:2.2rem;padding:18px;border-top:1px solid var(--line);background:#f8fafc;border-radius:12px}
.blog-side .side-heading{margin-top:1.4rem;padding-top:1rem;border-top:1px solid var(--line)}
.pagination-wrap{margin-top:28px}.nav-links{display:flex;gap:8px;flex-wrap:wrap}.nav-links .page-numbers{padding:.55rem .75rem;border:1px solid var(--line);border-radius:9px;background:#fff}.nav-links .current{background:var(--brand);color:#fff;border-color:var(--brand)}
@media(max-width:900px){.post-grid{grid-template-columns:1fr 1fr}.section-heading-row{align-items:flex-start;flex-direction:column}}
@media(max-width:640px){.post-grid{grid-template-columns:1fr}.blog-hero{padding-top:40px}}

/* Homepage redesign 1.2 — larger type, editorial layout, mobile-first touch targets */
body{font-size:18px;line-height:1.72;background:#f8f7f3;color:#172033}
.wrap{width:min(1180px,92vw)}
.site-header{background:rgba(255,255,255,.96)}
.nav{min-height:78px}
.brand{font-size:1.28rem;letter-spacing:-.02em}
.mark{width:42px;height:42px;border-radius:13px}
.navlinks{gap:1.15rem}
.navlinks a{font-size:1rem}

.home-main{overflow:hidden}
.home-hero{background:#fff;border-bottom:1px solid #e6e2da;padding:78px 0 66px}
.home-hero-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(360px,.8fr);gap:70px;align-items:center}
.home-kicker{margin:0 0 12px;color:#155eef;font-size:.82rem;line-height:1.2;font-weight:900;text-transform:uppercase;letter-spacing:.105em}
.home-hero h1{max-width:760px;margin:0;font-family:Georgia,"Times New Roman",serif;font-size:clamp(3.4rem,6.6vw,5.9rem);line-height:.96;letter-spacing:-.055em;font-weight:700;color:#111827}
.home-hero h1 span{display:block;color:#155eef}
.home-intro{max-width:720px;margin:28px 0 0;color:#526076;font-size:1.22rem;line-height:1.65}
.home-actions{display:flex;align-items:center;gap:24px;flex-wrap:wrap;margin-top:31px}
.home-primary{min-height:52px;padding:.86rem 1.2rem;border-radius:12px;font-size:1rem}
.home-text-link{font-weight:850;color:#1d2b44;text-decoration:none;border-bottom:2px solid #b9c9e8;padding-bottom:2px}
.home-text-link:hover{text-decoration:none;border-color:#155eef;color:#155eef}
.home-trust-row{display:flex;gap:14px 26px;flex-wrap:wrap;margin-top:32px;color:#657287;font-size:.93rem;font-weight:700}
.home-trust-row span{display:inline-flex;align-items:center;gap:8px}
.home-trust-row span:before{content:"✓";display:grid;place-items:center;width:22px;height:22px;border-radius:50%;background:#e9f8f1;color:#087a55;font-size:.76rem;font-weight:900}

.notebook-card{position:relative;background:#fffdf6;border:1px solid #dfd8c8;border-radius:8px;padding:28px 30px 30px;box-shadow:12px 14px 0 #e8edf7,0 18px 50px rgba(35,48,75,.09);transform:rotate(1deg);background-image:repeating-linear-gradient(to bottom,transparent 0,transparent 34px,rgba(62,103,168,.11) 35px)}
.notebook-card:before{content:"";position:absolute;left:38px;top:0;bottom:0;width:1px;background:#e8a0a0;opacity:.7}
.notebook-top{position:relative;display:flex;justify-content:space-between;align-items:center;margin:0 0 20px 25px;color:#68758b;font-size:.77rem;font-weight:900;text-transform:uppercase;letter-spacing:.09em}
.notebook-dot{width:10px;height:10px;border-radius:50%;background:#f1b632}
.notebook-question{position:relative;margin:0 0 24px 25px;color:#1d293b;font-family:Georgia,"Times New Roman",serif;font-size:1.28rem;line-height:1.45;font-weight:700}
.notebook-line{position:relative;display:flex;justify-content:space-between;gap:18px;margin:0 0 10px 25px;color:#526076;font-size:.94rem}
.notebook-line strong{color:#1f2d42}
.notebook-equation{position:relative;margin:18px 0 20px 25px;color:#0f4fd6;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:1.18rem;font-weight:800}
.notebook-check{position:relative;margin:0 0 0 25px;color:#3e4d63;font-size:.92rem;line-height:1.55}

.home-topics,.home-blog-section{padding:76px 0}
.home-section-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,500px);gap:50px;align-items:end;margin-bottom:30px}
.home-section-head h2,.home-featured h2,.home-closing h2{font-family:Georgia,"Times New Roman",serif;font-size:clamp(2.25rem,4.4vw,4rem);line-height:1.05;letter-spacing:-.035em;margin:0;color:#151d2d}
.home-section-head>p{margin:0;color:#647085;font-size:1.02rem}
.topic-panels{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.topic-panel{position:relative;min-height:330px;padding:30px 28px;border:1px solid #dedbd2;border-radius:18px;background:#fff;color:#172033;text-decoration:none;overflow:hidden;transition:transform .18s ease,box-shadow .18s ease}
.topic-panel:hover{text-decoration:none;transform:translateY(-3px);box-shadow:0 16px 45px rgba(24,39,65,.09)}
.topic-panel:after{content:"";position:absolute;width:170px;height:170px;border-radius:50%;right:-70px;bottom:-65px;background:#eef3ff}
.topic-number{position:relative;z-index:1;color:#8b95a6;font-size:.8rem;font-weight:900;letter-spacing:.09em}
.topic-symbol{position:relative;z-index:1;display:block;margin:34px 0 26px;font:700 3.25rem/1 Georgia,"Times New Roman",serif;color:#155eef}
.topic-panel h3{position:relative;z-index:1;margin:0 0 10px;font-size:1.38rem;letter-spacing:-.02em}
.topic-panel p{position:relative;z-index:1;margin:0;color:#667287;font-size:.97rem}
.topic-link{position:absolute;z-index:2;left:28px;bottom:27px;font-size:.9rem;font-weight:900;color:#23334d}
.topic-algebra .topic-symbol{color:#8a48bb}.topic-algebra:after{background:#f2ebf8}
.topic-geometry .topic-symbol{color:#b46612}.topic-geometry:after{background:#fff0dc}

.home-featured{padding:78px 0;background:#142033;color:#fff}
.home-featured-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(300px,.65fr);gap:72px;align-items:start}
.home-featured .home-kicker{color:#91b8ff}
.home-featured h2{color:#fff;max-width:760px}
.lesson-list{margin-top:34px;border-top:1px solid #34435a}
.lesson-item{display:grid;grid-template-columns:38px 1fr 30px;gap:20px;align-items:start;padding:24px 4px;border-bottom:1px solid #34435a;color:#fff;text-decoration:none}
.lesson-item:hover{text-decoration:none}.lesson-item:hover strong{color:#91b8ff}.lesson-item:hover .lesson-arrow{transform:translate(3px,-3px)}
.lesson-index{color:#91a0b6;font-size:.8rem;font-weight:900;padding-top:5px}
.lesson-item strong{display:block;font-size:1.18rem;letter-spacing:-.01em;transition:color .18s ease}
.lesson-item small{display:block;margin-top:6px;color:#b8c4d5;font-size:.94rem;line-height:1.5;font-weight:500}
.lesson-arrow{font-size:1.2rem;color:#91b8ff;transition:transform .18s ease}
.home-tool-note{margin-top:31px;padding:28px;border:1px solid #405069;border-radius:16px;background:#1b2940}
.home-tool-note h3{margin:0 0 13px;font-family:Georgia,"Times New Roman",serif;font-size:1.6rem;line-height:1.18}
.home-tool-note p:not(.home-kicker){color:#bac6d7;font-size:.98rem}
.home-tool-note a{display:inline-block;margin-top:8px;color:#a9c8ff;font-weight:850}

.home-blog-section{background:#fff}
.blog-heading{align-items:center}
.home-post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.home-post-card{display:flex;flex-direction:column;min-height:280px;padding:27px;border:1px solid #e0ddd6;border-radius:16px;background:#fcfbf8}
.home-post-card h3{margin:16px 0 11px;font-family:Georgia,"Times New Roman",serif;font-size:1.42rem;line-height:1.22;letter-spacing:-.02em}
.home-post-card h3 a{color:#162034;text-decoration:none}.home-post-card h3 a:hover{color:#155eef}
.home-post-card p{margin:0 0 22px;color:#667287;font-size:.95rem;line-height:1.58}
.home-post-meta{display:flex;justify-content:space-between;gap:12px;color:#7c8797;font-size:.76rem;font-weight:850;text-transform:uppercase;letter-spacing:.05em}
.home-post-meta span{color:#155eef}
.home-read{margin-top:auto;color:#243650;font-size:.9rem;font-weight:900}
.home-post-featured{grid-column:span 2;background:#f0f5ff;border-color:#ccdaf2;min-height:330px;padding:34px}
.home-post-featured h3{font-size:clamp(1.75rem,3vw,2.45rem);max-width:680px}
.home-post-featured p{max-width:680px;font-size:1rem}
.home-empty{padding:26px;border:1px dashed #ccd3df;border-radius:14px;color:#68758a}

.home-closing{padding:74px 0;background:#f8f7f3;border-top:1px solid #e1ddd4}
.home-closing-inner{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(300px,.8fr);gap:70px;align-items:end}
.home-closing h2{max-width:760px}
.home-closing-inner>p{margin:0;color:#606d81;font-size:1.04rem}

/* Increase readability site-wide without making article lines too long */
.article p,.article li{font-size:1.08rem}
.card p,.post-card p{font-size:1rem}
.footer{font-size:1rem}
.footer p{max-width:520px}

@media(max-width:980px){
 .home-hero-grid,.home-featured-grid{grid-template-columns:1fr;gap:45px}
 .home-hero{padding-top:62px}
 .notebook-card{max-width:650px;transform:none}
 .home-section-head,.home-closing-inner{grid-template-columns:1fr;gap:18px;align-items:start}
 .topic-panels{grid-template-columns:1fr 1fr}.topic-panel:last-child{grid-column:1/-1;min-height:260px}
 .home-post-grid{grid-template-columns:1fr 1fr}.home-post-featured{grid-column:1/-1}
}

@media(max-width:900px){
 .nav{flex-wrap:wrap;gap:0;padding:11px 0 0}
 .navlinks{display:flex;width:100%;overflow-x:auto;flex-wrap:nowrap;gap:0;margin-top:10px;border-top:1px solid #edf0f4;scrollbar-width:none;-webkit-overflow-scrolling:touch}
 .navlinks::-webkit-scrollbar{display:none}
 .navlinks a{flex:0 0 auto;padding:11px 15px 12px 0;margin-right:18px;font-size:.95rem;white-space:nowrap}
 .site-header{position:sticky}
}

@media(max-width:640px){
 body{font-size:17px;line-height:1.68}
 .wrap{width:min(100% - 32px,1180px)}
 .topbar .wrap{padding:.5rem 0}.topbar{font-size:.78rem}.topbar-topics{display:none}
 .nav{min-height:auto}.brand{font-size:1.16rem}.mark{width:38px;height:38px}
 .home-hero{padding:48px 0 42px}
 .home-hero h1{font-size:clamp(3rem,14vw,4.2rem);line-height:.96}
 .home-intro{font-size:1.08rem;line-height:1.62;margin-top:22px}
 .home-actions{align-items:stretch;gap:18px;margin-top:26px}
 .home-primary{width:100%;min-height:54px;font-size:1.02rem}
 .home-text-link{font-size:.96rem}
 .home-trust-row{display:grid;grid-template-columns:1fr;gap:10px;margin-top:27px}
 .notebook-card{padding:24px 20px 25px;box-shadow:7px 8px 0 #e8edf7}
 .notebook-card:before{left:28px}.notebook-top,.notebook-question,.notebook-line,.notebook-equation,.notebook-check{margin-left:20px}
 .notebook-question{font-size:1.17rem}.notebook-line{display:block}.notebook-line strong{display:block;margin-top:2px}.notebook-equation{font-size:1.05rem}
 .home-topics,.home-blog-section{padding:58px 0}.home-featured,.home-closing{padding:58px 0}
 .home-section-head h2,.home-featured h2,.home-closing h2{font-size:2.55rem;line-height:1.04}
 .home-section-head>p,.home-closing-inner>p{font-size:1rem}
 .topic-panels{grid-template-columns:1fr}.topic-panel,.topic-panel:last-child{grid-column:auto;min-height:292px;padding:25px 23px}.topic-link{left:23px}
 .home-featured-grid{gap:34px}.lesson-item{grid-template-columns:28px 1fr 22px;gap:12px;padding:21px 0}.lesson-item strong{font-size:1.08rem}.lesson-item small{font-size:.9rem}
 .home-tool-note{margin-top:0;padding:23px}
 .home-post-grid{grid-template-columns:1fr}.home-post-featured{grid-column:auto;min-height:300px;padding:27px}.home-post-card{min-height:250px;padding:24px}.home-post-featured h3{font-size:1.75rem}.home-post-card h3{font-size:1.35rem}.home-post-meta{font-size:.71rem}
 .article p,.article li{font-size:1.04rem}
 .footer{margin-top:0}
}


/* Notebook solution pages */
.notebook-article{
  position:relative;
  background:#fffdf7;
  border:1px solid #ddd5c5;
  border-radius:12px;
  box-shadow:12px 14px 0 #e8edf7,0 18px 50px rgba(35,48,75,.08);
  background-image:repeating-linear-gradient(to bottom,transparent 0,transparent 37px,rgba(76,115,176,.10) 38px);
  overflow:hidden;
}
.notebook-article:before{
  content:"";
  position:absolute;
  left:44px;
  top:0;
  bottom:0;
  width:1px;
  background:#e7a2a2;
}
.notebook-article>*{position:relative;margin-left:26px}
.notebook-article .breadcrumbs,.notebook-article .article-meta,.notebook-article .post-card-meta{color:#68758b}
.notebook-article h1,.notebook-article h2,.notebook-article h3{font-family:Georgia,"Times New Roman",serif;color:#182234}
.notebook-article h1{font-size:clamp(2.2rem,4.5vw,3.8rem);line-height:1.02;margin-top:.4rem}
.notebook-article h2{font-size:1.9rem;line-height:1.15;margin-top:2.1rem}
.notebook-article p,.notebook-article li{font-size:1.1rem;line-height:1.8;color:#344255}
.notebook-article .lead,.notebook-article > p:first-of-type{font-size:1.18rem;color:#46556e}
.notebook-article .equation{
  background:rgba(17,89,239,.06);
  color:#0f4fd6;
  border:1px solid #c9dafc;
  border-radius:10px;
  font-size:1.08rem;
  line-height:1.8;
  font-weight:800;
}
.notebook-article .tip,.notebook-article .note,.notebook-article .warning,.notebook-article .worked{
  background:rgba(255,255,255,.72);
  border:1px dashed #c8c0af;
  box-shadow:none;
}
.notebook-label{
  display:inline-flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:.35rem 0;
  font-size:.78rem;
  font-weight:900;
  letter-spacing:.09em;
  text-transform:uppercase;
  color:#6a768b;
}
.notebook-label:after{
  content:"";
  width:10px;height:10px;border-radius:50%;background:#f1b632;display:block;
}
.notebook-side .toc{background:#f9fafc}
@media(max-width:760px){
  .notebook-article{padding:24px 18px 26px;box-shadow:7px 8px 0 #e8edf7}
  .notebook-article:before{left:28px}
  .notebook-article>*{margin-left:18px}
  .notebook-article h1{font-size:clamp(2rem,10vw,3rem)}
  .notebook-article h2{font-size:1.55rem}
  .notebook-article p,.notebook-article li{font-size:1.06rem;line-height:1.78}
}