@import url("./brand-tokens.css");
/* DigiThat · The Good Website Edition · 2026-09-17
   All presentation lives here. Original logo geometry is preserved. */
:root{color-scheme:light;--ink:var(--dt-navy);--navy:var(--dt-navy-raised);--paper:var(--dt-warm-white);--card:var(--dt-white);--sand:var(--dt-sand);--orange:var(--dt-orange);--teal:var(--dt-teal);--rust:var(--dt-accent-on-light);--muted:var(--dt-muted-light);--line:var(--dt-border-light);--soft-line:var(--dt-line-light);--focus:var(--dt-navy);--text:var(--ink);--inverse:var(--dt-warm-white);--room:var(--dt-navy);--room-muted:var(--dt-muted-dark);--font-body:Arial,"Helvetica Neue",sans-serif;--font-display:Georgia,"Times New Roman",serif;--gutter:clamp(20px,4.4vw,80px);--content:1600px;--radius:6px;--space:clamp(64px,8vw,120px);--shadow:0 20px 56px #091a2514}
html[data-theme=dark]{color-scheme:dark;--paper:var(--dt-navy);--card:var(--dt-navy-raised);--sand:var(--dt-navy-panel);--text:var(--dt-sand);--muted:var(--dt-muted-dark);--line:var(--dt-border-dark);--soft-line:var(--dt-line-dark);--rust:var(--dt-orange);--focus:var(--dt-teal);--room:var(--dt-navy);--room-muted:var(--dt-muted-dark);--shadow:0 20px 56px #0003}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:104px}body{margin:0;background:var(--paper);color:var(--text);font-family:var(--font-body);font-size:18px;line-height:1.65;-webkit-font-smoothing:antialiased}h1,h2,h3,h4,p,figure{margin:0}h1,h2,h3{font-family:var(--font-display);font-weight:400;letter-spacing:-.045em;line-height:1.06;text-wrap:balance}h1{font-size:clamp(48px,6.9vw,110px)}h2{font-size:clamp(38px,4.4vw,68px)}h3{font-size:clamp(28px,2.6vw,38px)}h4{font-size:19px;line-height:1.35}p{max-width:68ch}p+p{margin-top:1em}a{color:inherit;text-underline-offset:5px;text-decoration-thickness:1px}a:hover{text-decoration-thickness:2px}img{display:block;max-width:100%;height:auto}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed}a,button,input,textarea,select,summary{touch-action:manipulation}:focus-visible{outline:3px solid var(--focus);outline-offset:5px}::selection{background:var(--orange);color:var(--ink)}[hidden]{display:none!important}.wrap{width:min(var(--content),calc(100% - var(--gutter)*2));margin-inline:auto}.narrow{max-width:820px}.small{font-size:14px;line-height:1.65}.muted{color:var(--muted)}.sr-only{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{position:fixed;z-index:500;top:10px;left:16px;padding:12px 20px;background:var(--orange);color:var(--ink);transform:translateY(-180%)}.skip-link:focus{transform:translateY(0)}.eyebrow{font-size:12px;line-height:1.5;letter-spacing:.18em;text-transform:uppercase;font-weight:700;display:block;margin-bottom:24px}.eyebrow:before{content:"";display:inline-block;width:26px;height:2px;background:var(--orange);vertical-align:middle;margin-right:12px}.lead{font-size:clamp(20px,1.8vw,25px);line-height:1.55}.accent{color:var(--rust)}.section{padding-block:var(--space)}.section-top{padding-top:var(--space)}.section-bottom{padding-bottom:var(--space)}.rule-top{border-top:1px solid var(--line)}.actions{display:flex;gap:14px 24px;align-items:center;flex-wrap:wrap;margin-top:30px}.button{display:inline-flex;align-items:center;justify-content:center;gap:20px;min-height:52px;padding:12px 24px;background:var(--orange);color:var(--ink);border:1px solid var(--orange);border-radius:3px;font-size:16px;line-height:1.4;font-weight:700;text-decoration:none;transition:background .18s,transform .18s}.button:hover{background:var(--dt-orange-hover);border-color:var(--dt-orange-hover);transform:translateY(-2px)}.button--ghost{background:transparent;border-color:var(--line);color:var(--text)}.button--ghost:hover{background:var(--sand);border-color:var(--line)}.button--ink{background:var(--ink);border-color:var(--ink);color:#fffdf9}.button--ink:hover{background:#244753;border-color:#244753}.text-link{font-size:16px;min-height:44px;display:inline-flex;gap:16px;align-items:center;font-weight:700}.arrow{font-size:22px;line-height:1}.site-header{position:relative;z-index:20;border-bottom:1px solid var(--line);background:var(--paper)}.header-inner{min-height:100px;display:flex;align-items:center;gap:35px}.brand{width:165px;flex-shrink:0;display:block}.brand img{width:100%}.logo-light{display:block}.logo-dark{display:none}html[data-theme=dark] .logo-light{display:none}html[data-theme=dark] .logo-dark{display:block}.header-note{font-size:12px;line-height:1.5;letter-spacing:.05em;border-left:1px solid var(--line);padding-left:22px;max-width:155px}.navigation{margin-left:auto;display:flex;align-items:center;gap:26px}.navigation a:not(.button){font-size:14px;font-weight:700;min-height:44px;display:inline-flex;align-items:center;text-decoration:none}.navigation a:not(.button):hover,.navigation a[aria-current=page]{text-decoration:underline}.navigation .button{padding-inline:20px;min-height:46px;font-size:14px}.theme-button{border:1px solid var(--line);background:transparent;color:var(--text);height:44px;min-width:44px;border-radius:50%;font-size:20px}.menu-button{display:none;min-height:44px;padding:8px 14px;border:1px solid var(--line);background:transparent;color:var(--text);border-radius:3px;font-weight:700;font-size:14px}.preview-flag{border-bottom:1px solid var(--line);background:var(--sand);text-align:center;padding:5px 12px;font-size:12px;letter-spacing:.02em}.preview-flag a{margin-left:12px}.hero{padding-block:70px 56px}.hero-topline{display:flex;align-items:center;justify-content:space-between;gap:20px}.hero-topline .eyebrow{margin-bottom:28px}.location{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin-bottom:28px}.hero-grid{display:grid;grid-template-columns:1.55fr 1fr;gap:60px;align-items:end}.hero h1{max-width:12ch}.hero-side{max-width:435px;padding-bottom:8px}.hero-side p{font-size:19px}.hero-side .actions{gap:8px 20px}.hero-footnote{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--muted);margin-top:24px}.hero-footnote:before{content:"";height:6px;width:6px;border-radius:50%;background:var(--rust);flex-shrink:0}.hero .accent{display:block}.showcase{padding-bottom:var(--space)}.showcase-top{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:18px;border-top:1px solid var(--line);padding-top:24px}.showcase-title{font-size:14px;font-weight:700;letter-spacing:.02em}.showcase-subtitle{font-size:13px;color:var(--muted);margin-top:2px}.segmented{display:inline-flex;gap:3px;padding:4px;background:var(--sand);border:1px solid var(--line);border-radius:5px;flex-shrink:0}.segmented button{border:0;background:transparent;color:var(--text);font-size:13px;font-weight:700;padding:9px 16px;min-height:40px;border-radius:3px}.segmented button[aria-pressed=true]{background:var(--ink);color:#fffdf9}.reveal-frame{width:100%;position:relative;aspect-ratio:16/9;background:var(--navy);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);border-radius:4px}.reveal-image{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;max-width:none;user-select:none;-webkit-user-drag:none}.reveal-after,.reveal-before{position:absolute;inset:0}.reveal-before{clip-path:inset(0 50% 0 0)}.reveal-divider{position:absolute;top:0;bottom:0;left:50%;width:2px;background:var(--orange);box-shadow:0 0 0 1px #091a2580;pointer-events:none}.reveal-handle{position:absolute;left:50%;top:50%;width:64px;height:64px;border-radius:50%;background:var(--orange);color:var(--ink);border:2px solid var(--ink);box-shadow:0 3px 15px #0004;transform:translate(-50%,-50%);z-index:4;display:flex;align-items:center;justify-content:center;gap:8px;font-size:24px;touch-action:none;cursor:ew-resize}.reveal-handle:focus-visible{outline:4px solid white;outline-offset:4px}.reveal-label{position:absolute;bottom:16px;border:1px solid #fff6;padding:6px 10px;font-size:12px;letter-spacing:.1em;font-weight:700;background:#091a25;color:#fffdf9;pointer-events:none;z-index:2}.reveal-label--before{left:16px}.reveal-label--after{right:16px}.reveal-pos-0 .reveal-label--before,.reveal-pos-100 .reveal-label--after{display:none}.reveal-help{font-size:13px;margin-top:14px;color:var(--muted);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}.reveal-help a{font-size:13px}.reveal-text{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin-top:34px}.reveal-text h3{font-family:var(--font-body);font-size:17px;font-weight:700;letter-spacing:0;line-height:1.4;margin-bottom:10px}.reveal-text p{font-size:15px;color:var(--muted)}.reveal-text .number{font-family:var(--font-display);font-size:24px;color:var(--rust);margin-right:8px}.reveal-nojs{padding:20px;border:1px solid var(--line);font-size:16px}.statement{padding-block:45px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.statement-inner{display:grid;grid-template-columns:1fr 1.7fr;gap:60px;align-items:center}.statement h2{font-size:clamp(28px,3vw,45px)}.statement p{font-size:18px;color:var(--muted)}.room{background:var(--room);color:var(--inverse);--line:#5a7479;--text:#f6f0e5;--muted:#c8d0ca;--card:#17343f;--sand:#21414a;--focus:#f2b58c;--rust:#f2a178}.room .accent{color:#eda47f}.room .button--ghost{color:var(--inverse)}.room .eyebrow{color:#e7dcc6}.section-heading{display:grid;grid-template-columns:1.2fr 1fr;gap:70px;align-items:end;margin-bottom:48px}.section-heading p{max-width:46ch;color:var(--muted);font-size:18px}.section-heading h2{max-width:15ch}.problem-list{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}.problem{padding:28px 0 10px;border-top:1px solid var(--line)}.problem h3{margin:20px 0 18px;font-size:35px}.problem p{color:var(--muted);font-size:17px}.problem .index{font-size:12px;letter-spacing:.15em}.problem a{margin-top:18px}.margin-note{margin-top:36px;padding:22px 0 0;border-top:1px solid var(--line);font-family:var(--font-display);font-size:24px;letter-spacing:-.02em}.process-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}.process-step{padding-top:26px;border-top:1px solid var(--line)}.process-step .step-number{font-size:42px;font-family:var(--font-display);color:var(--rust)}.process-step h3{font-size:31px;margin:18px 0 14px}.process-step p{color:var(--muted);font-size:17px}.process-bottom{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-top:36px}.process-bottom p{font-size:15px;color:var(--muted)}.library-teaser{display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:center}.library-teaser h2{max-width:13ch;margin-bottom:25px}.library-teaser p{color:var(--muted)}.book-spine{display:grid;grid-template-columns:45px 1fr;min-height:460px;background:var(--card);border:1px solid var(--line);box-shadow:14px 16px 0 var(--sand);border-radius:3px;color:var(--text)}.book-edge{background:var(--orange);border-right:1px solid var(--line);display:flex;align-items:center;justify-content:center}.book-edge span{writing-mode:vertical-rl;transform:rotate(180deg);font-size:12px;letter-spacing:.25em;color:var(--ink);font-weight:700}.book-cover{padding:35px;display:flex;flex-direction:column;align-items:start}.book-cover .eyebrow{font-size:12px;line-height:1.5}.book-cover h3{font-size:46px;max-width:9ch}.book-cover .book-mark{font-size:66px;line-height:1;margin:20px 0;color:var(--rust);font-family:var(--font-display)}.book-cover .book-bottom{margin-top:auto;border-top:1px solid var(--line);width:100%;padding-top:18px;display:flex;justify-content:space-between;gap:16px;font-size:13px}.founder{display:grid;grid-template-columns:1fr 1.1fr;gap:80px;align-items:center}.founder-image{border-radius:3px;overflow:hidden;position:relative}.founder-image img{aspect-ratio:4/3;object-fit:cover}.founder-image figcaption{font-size:12px;color:var(--muted);margin-top:10px}.founder h2{max-width:14ch;margin-bottom:24px}.founder p{color:var(--muted)}.motto{border-top:1px solid var(--line);margin-top:26px;padding-top:20px;display:flex;gap:16px;flex-wrap:wrap;font-size:14px}.motto strong{font-family:var(--font-display);font-size:19px;font-weight:400}.faq-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:90px}.faq-layout h2{max-width:12ch}.faq-list details{border-top:1px solid var(--line);padding-block:22px}.faq-list details:last-child{border-bottom:1px solid var(--line)}summary{font-size:18px;font-weight:700;cursor:pointer;list-style:none;min-height:32px;position:relative;padding-right:35px}summary:after{content:"+";position:absolute;right:2px;top:-3px;font-size:24px;font-weight:400}summary::-webkit-details-marker{display:none}details[open]>summary:after{content:"−"}.faq-list details p{padding-top:18px;font-size:16px;color:var(--muted)}.invitation{padding:70px 0}.invitation-inner{display:flex;justify-content:space-between;align-items:center;gap:60px}.invitation h2{max-width:17ch}.invitation p{margin-top:20px;max-width:50ch;font-size:18px;color:var(--muted)}.invitation .button{flex-shrink:0}.site-footer{border-top:1px solid var(--line);padding:54px 0 24px}.footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:60px}.footer-brand .brand{margin-bottom:20px}.footer-brand p{font-size:15px;max-width:34ch;color:var(--muted)}.footer-links{display:flex;flex-direction:column;align-items:start;gap:10px;font-size:14px}.footer-links h3{font-family:var(--font-body);font-size:14px;letter-spacing:0;font-weight:700;margin-bottom:10px}.footer-links a{padding-block:4px}.footer-bottom{border-top:1px solid var(--line);padding-top:20px;margin-top:40px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12px;color:var(--muted)}.subhero{padding:60px 0}.subhero h1{max-width:15ch;font-size:clamp(46px,6vw,88px)}.subhero .lead{margin-top:28px;max-width:55ch;color:var(--muted)}.breadcrumb{font-size:13px;margin-bottom:30px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}.split-content{display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:start}.prose{max-width:760px}.prose h2{font-size:38px;margin:42px 0 22px}.prose h3{font-size:27px;margin:32px 0 16px}.prose p{font-size:18px}.prose ul,.prose ol{padding-left:24px}.prose li{margin:12px 0}.prose code{font-size:.92em;overflow-wrap:anywhere}.info-box{border:1px solid var(--line);border-left:4px solid var(--orange);padding:25px 30px;background:var(--card);margin:30px 0}.info-box p{font-size:16px}.info-box h3{font-family:var(--font-body);font-size:19px;font-weight:700;letter-spacing:0;margin:0 0 12px}.note-panel{background:var(--sand);padding:35px;border-radius:4px}.note-panel h3{margin-bottom:22px}.note-panel p{font-size:17px}.note-panel li{font-size:16px;margin-block:12px}.contact-grid{display:grid;grid-template-columns:1fr 1.25fr;gap:80px;align-items:start}.contact-details{border-top:1px solid var(--line);padding-top:28px;margin-top:35px}.contact-details a{display:block;margin-block:12px;overflow-wrap:anywhere}.enquiry-form{padding:36px;background:var(--card);border:1px solid var(--line);border-radius:5px}.field{margin:0 0 22px}.field label{display:block;font-size:15px;font-weight:700;margin-bottom:8px}.field label span{font-weight:400;color:var(--muted);margin-left:6px;font-size:13px}.field input,.field textarea,.field select,.search-field input{width:100%;border:1px solid var(--line);border-radius:3px;padding:13px 14px;background:var(--paper);color:var(--text);font-size:17px;min-height:50px}.field textarea{min-height:145px;resize:vertical}.field input::placeholder,.field textarea::placeholder{color:var(--muted);opacity:1}.field small{font-size:13px;display:block;margin-top:6px;color:var(--muted)}.two-fields{display:grid;grid-template-columns:1fr 1fr;gap:20px}.check-field{display:flex;align-items:start;gap:12px;font-size:14px;margin-block:18px}.check-field input{width:20px;height:20px;margin:2px 0;flex-shrink:0;accent-color:var(--rust)}.email-draft{margin-top:24px;padding-top:24px;border-top:1px solid var(--line)}.email-draft textarea{width:100%;height:230px;background:var(--paper);color:var(--text);font-size:15px;padding:14px;border:1px solid var(--line);border-radius:3px}.status{font-size:14px;min-height:24px;margin-top:12px}.error{color:var(--rust)}.honeypot{display:none}.library-header{padding:58px 0 42px}.library-header h1{font-size:clamp(48px,6vw,88px);max-width:15ch}.library-heading-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:80px;align-items:end}.library-heading-grid p{color:var(--muted);font-size:19px}.library-stats{display:flex;gap:32px;flex-wrap:wrap;margin-top:35px;padding-top:22px;border-top:1px solid var(--line);font-size:14px}.library-stats strong{font-family:var(--font-display);font-weight:400;font-size:26px;margin-right:6px}.library-controls{background:var(--sand);padding:28px 0;border-block:1px solid var(--line)}.library-tools{display:flex;align-items:end;gap:20px;justify-content:space-between;flex-wrap:wrap}.search-field{flex:1;min-width:220px;max-width:600px}.search-field label{font-size:13px;font-weight:700;display:block;margin-bottom:8px}.filter-group{display:flex;gap:6px;flex-wrap:wrap}.filter-group button{min-height:44px;border:1px solid var(--line);padding:8px 14px;border-radius:3px;background:transparent;color:var(--text);font-size:14px}.filter-group button[aria-pressed=true]{background:var(--ink);color:#fffdf9;border-color:var(--ink)}.library-progress{display:flex;gap:20px;align-items:center;justify-content:space-between;font-size:13px;margin-top:20px;flex-wrap:wrap}.library-progress button{background:none;border:0;text-decoration:underline;color:var(--text);min-height:44px;padding:5px;font-size:13px}.lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.lesson-card{border:1px solid var(--line);background:var(--card);padding:28px;display:flex;flex-direction:column;min-height:320px;transition:border-color .2s,transform .2s;border-radius:4px}.lesson-card:hover{border-color:var(--rust);transform:translateY(-3px)}.lesson-meta{display:flex;justify-content:space-between;align-items:center;gap:10px;color:var(--muted);font-size:12px;letter-spacing:.06em;text-transform:uppercase;margin-bottom:30px}.lesson-card h2{font-size:32px;max-width:16ch;margin-bottom:20px}.lesson-card h2 a{text-decoration:none}.lesson-card p{font-size:16px;color:var(--muted);margin-bottom:20px}.lesson-card .text-link{margin-top:auto;font-size:14px}.lesson-card-footer{margin-top:auto;display:flex;justify-content:space-between;gap:10px;align-items:center}.bookmark{border:1px solid var(--line);background:none;color:var(--text);border-radius:3px;min-height:44px;padding:8px 10px;font-size:13px}.bookmark[aria-pressed=true]{background:var(--sand);border-color:var(--rust)}.read-badge{font-size:12px;color:var(--rust);font-weight:700}.lesson-layout{display:grid;grid-template-columns:250px minmax(0,760px);gap:80px;justify-content:center;align-items:start}.lesson-sidebar{position:sticky;top:30px;font-size:14px}.lesson-sidebar h2{font-family:var(--font-body);font-size:14px;font-weight:700;letter-spacing:0;margin-bottom:20px}.lesson-sidebar nav{display:flex;flex-direction:column;border-left:1px solid var(--line)}.lesson-sidebar nav a{padding:9px 0 9px 20px;text-decoration:none;font-size:13px}.lesson-sidebar nav a[aria-current=page]{border-left:3px solid var(--rust);padding-left:18px;font-weight:700}.lesson-title{padding-bottom:32px;border-bottom:1px solid var(--line);margin-bottom:36px}.lesson-title h1{font-size:clamp(44px,4.8vw,72px);max-width:15ch}.lesson-title p{margin-top:24px;font-size:22px;color:var(--muted)}.lesson-body h2{font-size:34px;margin:40px 0 18px}.lesson-body p{font-size:18px;margin-bottom:20px}.lesson-body .example{padding:25px 28px;background:var(--sand);border-left:3px solid var(--rust);margin:28px 0}.lesson-body .example p{font-family:var(--font-display);font-size:26px;line-height:1.45;margin:0}.lesson-body .example p+p{margin-top:18px}.lesson-body .example .small{font-family:var(--font-body);font-size:13px}.lesson-body .checklist{padding:0;list-style:none}.lesson-body .checklist li{position:relative;padding:12px 0 12px 30px;border-bottom:1px solid var(--soft-line);font-size:16px}.lesson-body .checklist li:before{content:"✓";position:absolute;left:0;color:var(--rust);font-weight:700}.challenge{margin-top:40px;padding:30px;background:var(--room);color:var(--inverse);border-radius:4px;--focus:#f2b58c}.challenge h2{font-size:31px;margin:0 0 18px}.challenge p{font-size:17px}.challenge fieldset{padding:0;margin:20px 0 0;border:0}.challenge legend{font-size:17px;font-weight:700;line-height:1.5;margin-bottom:20px}.quiz-option{display:flex;gap:12px;align-items:start;border:1px solid #748889;padding:14px;margin:10px 0;border-radius:3px;font-size:15px;cursor:pointer}.quiz-option:has(input:checked){border-color:var(--orange);background:#26404a}.quiz-option input{margin-top:5px;accent-color:var(--orange);flex-shrink:0}.challenge-result{padding:20px;border-left:3px solid var(--orange);background:#1b3a46;margin-top:20px;font-size:16px}.challenge-result p{font-size:16px;margin:0}.challenge .small{font-size:13px;color:#c8d0ca;margin-top:16px}.challenge details{margin-top:20px}.challenge summary{font-size:14px}.source-note{padding-top:30px;margin-top:36px;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}.source-note h2{font-family:var(--font-body);font-size:16px;font-weight:700;letter-spacing:0;margin:0 0 15px;color:var(--text)}.source-note p{font-size:14px;margin-bottom:16px}.source-note 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@media(min-width:1800px){.hero-grid{grid-template-columns:1.7fr 1fr}.hero h1{font-size:120px}.hero-side{max-width:450px}}
@media(max-width:1180px){.header-note{display:none}.header-inner{gap:25px}.navigation{gap:20px}.hero-grid{gap:40px}.hero h1{font-size:clamp(60px,7.5vw,85px)}.library-teaser{gap:60px}.founder{gap:45px}.lesson-layout{grid-template-columns:200px minmax(0,760px);gap:45px}.lesson-grid{gap:18px}.lesson-card{padding:24px}.lesson-card h2{font-size:29px}.contact-grid{gap:45px}}
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@media(max-width:380px){.brand{width:135px}.header-inner{gap:15px}.hero h1{font-size:48px}.hero .actions .button{width:100%}.eyebrow{letter-spacing:.1em}.button{padding-inline:18px}.footer-top{grid-template-columns:1fr}.lesson-title h1{font-size:40px}.enquiry-form{padding:20px}.hero-side p{font-size:17px}.showcase-subtitle{font-size:12px}.segmented button{padding-inline:8px}.reveal-help a{font-size:12px}.book-cover{padding:22px}.book-cover h3{font-size:36px}.book-spine{grid-template-columns:35px 1fr}}
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@media(forced-colors:active){.button,.lesson-card,.segmented button,.reveal-handle{border:1px solid ButtonText}.reveal-divider{background:CanvasText}.eyebrow:before{background:CanvasText}}
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/* A script failure must not hide the navigation or the content. */
html:not(.js) .header-inner{flex-wrap:wrap;padding-block:16px}html:not(.js) .navigation{flex-wrap:wrap;margin-left:0;width:100%;gap:12px 20px}html:not(.js) .menu-button{display:none}

/* AI, Made Useful — added 18 Sep 2026 */
.ai-hero{padding:clamp(3rem,7vw,6.5rem) 0 2rem}.ai-hero-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr);gap:clamp(2rem,6vw,6rem);align-items:end}.ai-hero h1{font-size:clamp(3.4rem,9vw,8rem);line-height:.86;letter-spacing:-.065em;margin:.3rem 0 1.4rem}.ai-hero .accent{display:block;color:var(--accent,#c96f45)}.ai-lead{font-size:clamp(1.15rem,2vw,1.5rem);line-height:1.45;max-width:38rem}.ai-note{border-left:3px solid var(--accent,#c96f45);padding-left:1rem;margin-top:1.5rem}.ai-lanes{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin:2.5rem 0}.ai-lane{border:1px solid currentColor;border-radius:1rem;padding:1.4rem;text-decoration:none;color:inherit;min-height:170px;display:flex;flex-direction:column;justify-content:space-between}.ai-lane:hover{transform:translateY(-2px)}.ai-lane strong{font-size:1.55rem}.ai-lane span:last-child{font-size:2rem}.ai-card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin-top:2rem}.ai-card{border-top:1px solid currentColor;padding:1.5rem 0 2rem;display:grid;grid-template-columns:72px 1fr;gap:1rem}.ai-card-number{font-size:2.3rem;line-height:1;color:var(--accent,#c96f45);font-weight:700}.ai-card h3{margin:.1rem 0 .55rem;font-size:1.35rem}.ai-card p{margin:0 0 .8rem}.ai-card a{font-weight:700}.ai-tool-strip{display:flex;gap:.55rem;flex-wrap:wrap;margin-top:.8rem}.ai-pill{border:1px solid currentColor;border-radius:999px;padding:.25rem .65rem;font-size:.82rem}.ai-detail-hero{padding:clamp(3rem,7vw,6rem) 0 2rem}.ai-detail-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,.55fr);gap:clamp(2rem,6vw,6rem);align-items:center}.ai-detail-hero h1{font-size:clamp(2.8rem,7vw,6.2rem);line-height:.92;letter-spacing:-.055em;margin:.5rem 0 1.2rem}.ai-illustration{border:1px solid currentColor;border-radius:1.4rem;min-height:290px;display:grid;place-items:center;padding:2rem;background:color-mix(in srgb,var(--accent,#c96f45) 8%,transparent)}.ai-illustration img{width:min(100%,320px);height:auto}.ai-steps{counter-reset:ai-step;max-width:820px}.ai-step{counter-increment:ai-step;display:grid;grid-template-columns:54px 1fr;gap:1rem;padding:1.35rem 0;border-top:1px solid currentColor}.ai-step:before{content:counter(ai-step,decimal-leading-zero);font-weight:800;font-size:1.15rem;color:var(--accent,#c96f45)}.ai-step h3{margin:0 0 .4rem}.ai-step p{margin:.2rem 0}.ai-prompt{margin-top:.7rem;padding:1rem 1.1rem;border-radius:.7rem;background:rgba(127,127,127,.12);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92rem;line-height:1.55}.ai-links{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:1rem}.ai-links a{border:1px solid currentColor;border-radius:999px;padding:.5rem .85rem;text-decoration:none}.ai-check{margin-top:2rem;padding:1.4rem;border:1px solid currentColor;border-radius:1rem}.ai-check strong{display:block;font-size:1.25rem;margin-bottom:.35rem}.ai-next{display:flex;justify-content:space-between;gap:1rem;margin-top:3rem;padding-top:1.5rem;border-top:1px solid currentColor}.ai-next a{font-weight:700}.ai-source-note{font-size:.88rem;opacity:.75;margin-top:2rem}.ai-warning{padding:1rem 1.1rem;border-left:4px solid var(--accent,#c96f45);background:rgba(127,127,127,.08);margin:1.5rem 0}.ai-jump{display:flex;gap:.7rem;flex-wrap:wrap;margin-top:1.3rem}.ai-jump a{font-weight:700}.ai-mini{font-size:.9rem;opacity:.8}.ai-menu-new{position:relative}.ai-menu-new:after{content:'NEW';font-size:.55rem;position:absolute;top:-.7rem;right:-.7rem;color:var(--accent,#c96f45);font-weight:800;letter-spacing:.08em}
@media(max-width:800px){.ai-hero-grid,.ai-detail-grid,.ai-lanes,.ai-card-grid{grid-template-columns:1fr}.ai-card{grid-template-columns:54px 1fr}.ai-hero h1{font-size:clamp(3.2rem,18vw,5.5rem)}.ai-next{flex-direction:column}.ai-menu-new:after{display:none}}