@font-face{font-family:Inter;src:url('assets/fonts/inter-latin.woff2') format('woff2');font-weight:100 900;font-style:normal;font-display:swap}@font-face{font-family:'Inter Tight';src:url('assets/fonts/inter-tight-latin.woff2') format('woff2');font-weight:100 900;font-style:normal;font-display:swap}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:104px}body{margin:0;background:var(--fp-canvas);color:var(--fp-text);font-family:var(--fp-font-body);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}button,input,select,textarea{font:inherit}button,a,input,select,textarea,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed}a{color:var(--fp-action);text-underline-offset:5px;text-decoration-thickness:1px}a:hover{text-decoration-thickness:2px}a,button{touch-action:manipulation}img{max-width:100%;display:block}svg{flex-shrink:0;vertical-align:middle}h1,h2,h3,h4,p{margin:0}h1,h2,h3{font-family:var(--fp-font-display);font-weight:450;line-height:1.1;letter-spacing:var(--fp-tracking-heading)}h1{text-wrap:balance}h2{font-size:clamp(2.3rem,3.5vw,4rem)}h3{font-size:1.6rem}strong{font-weight:600}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--fp-focus);outline-offset:3px}::selection{background:var(--fp-action);color:var(--fp-action-text)}[hidden]{display:none!important}.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;top:-90px;left:16px;z-index:100;padding:12px 20px;background:var(--fp-surface);color:var(--fp-text);border:1px solid var(--fp-border);border-radius:8px}.skip-link:focus{top:16px}.eyebrow{font-size:11px;font-weight:600;line-height:1.5;letter-spacing:.12em;text-transform:uppercase}.caption,.small,.hint{font-size:14px;line-height:1.5;color:var(--fp-muted)}.caption{margin-top:16px}.small{margin:16px 0}.topbar{height:80px;position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:32px;padding:0 36px;border-bottom:1px solid var(--fp-line);background:var(--fp-canvas)}.brand{width:184px;flex-shrink:0;display:block}.brand img{width:184px;height:30px}.brand-dark{display:none}[data-theme=dark] .brand-light{display:none}[data-theme=dark] .brand-dark{display:block}.topbar-title{font-size:13px;letter-spacing:.01em;border-left:1px solid var(--fp-line);padding-left:32px}.topbar-title span{color:var(--fp-muted)}.topbar-actions{margin-left:auto;display:flex;align-items:center;gap:12px}.theme-control{position:relative;display:flex;align-items:center}.theme-control select{font-size:13px;min-height:var(--fp-control-height-small);padding:7px 32px 7px 12px;background:transparent;border:1px solid var(--fp-line);border-radius:999px;color:var(--fp-text);appearance:none;width:106px;cursor:pointer}.theme-control svg{position:absolute;right:12px;width:16px;height:16px;pointer-events:none}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:var(--fp-control-height-small);height:var(--fp-control-height-small);min-width:var(--fp-control-height-small);min-height:var(--fp-control-height-small);flex:0 0 var(--fp-control-height-small);padding:0;border:1px solid var(--fp-border);border-radius:50%;color:var(--fp-text);background:var(--fp-surface)}.icon-btn:hover{background:var(--fp-subtle)}.menu-toggle{display:none}.sidebar{width:256px;position:fixed;left:0;top:80px;bottom:0;border-right:1px solid var(--fp-line);display:flex;flex-direction:column;background:var(--fp-canvas);z-index:25}.sidebar-head{padding:32px 24px 20px;display:flex;flex-direction:column;gap:5px}.chapter-count{font-size:12px;color:var(--fp-muted)}.sidebar nav{overflow:auto;padding:0 12px 20px;scrollbar-width:thin;scrollbar-color:var(--fp-line) transparent}.sidebar nav a{font-size:12px;display:flex;align-items:center;gap:12px;min-height:40px;padding:7px 12px;color:var(--fp-muted);text-decoration:none;border-left:2px solid transparent}.sidebar nav a span{font-variant-numeric:tabular-nums;font-size:10px;letter-spacing:.03em;opacity:.8}.sidebar nav a:hover{color:var(--fp-text);background:var(--fp-subtle)}.sidebar nav a[aria-current=true]{border-color:var(--fp-action);color:var(--fp-text);background:var(--fp-subtle)}.sidebar-download{margin-top:auto;display:flex;gap:10px;align-items:center;font-size:12px;padding:20px 24px;min-height:64px;border-top:1px solid var(--fp-line);text-decoration:none;color:var(--fp-text)}main{margin-left:256px;min-width:0}.cover{position:relative;min-height:720px;height:calc(100svh - 80px);max-height:1050px;overflow:hidden;isolation:isolate}.cover-material{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;z-index:-2}.cover:after{content:'';position:absolute;inset:0;z-index:-1;background:var(--fp-gradient-guide-cover)}[data-theme=dark] .cover:after{background:var(--fp-gradient-guide-cover)}.cover-copy{padding:clamp(72px,9vh,120px) clamp(32px,5vw,96px) 130px}.cover-copy h1{max-width:680px}.cover-copy .eyebrow,.cover-deck{max-width:608px}.cover-copy .eyebrow{margin-bottom:55px}.cover h1{font-size:clamp(4.5rem,7.5vw,8rem);font-weight:400;line-height:.99;letter-spacing:var(--fp-tracking-display)}.cover-deck{font-size:clamp(18px,1.8vw,24px);line-height:1.4;margin-top:36px}.cover .btn{margin-top:36px}.cover-bottom{position:absolute;bottom:30px;left:clamp(32px,5vw,96px);right:clamp(32px,5vw,96px);display:flex;justify-content:space-between;gap:20px;font-size:10px;letter-spacing:.04em;text-transform:uppercase}.intro{padding:100px clamp(32px,5vw,96px) 110px;border-bottom:1px solid var(--fp-line);max-width:1440px;margin:auto}.intro h2{margin-top:32px;max-width:800px}.intro>p:not(.eyebrow){max-width:570px;margin-top:32px;font-size:18px;color:var(--fp-muted)}.intro-links{display:flex;flex-wrap:wrap;gap:24px 40px;margin-top:40px}.intro-links a{font-size:13px;display:flex;gap:12px;align-items:center}.chapter{padding:88px clamp(32px,5vw,96px) 96px;border-bottom:1px solid var(--fp-line);max-width:1440px;margin:0 auto;scroll-margin-top:80px}.chapter-head{display:flex;gap:24px;align-items:flex-start;margin-bottom:40px}.chapter-number{font-size:12px;line-height:1.5;margin-top:3px;color:var(--fp-action);font-variant-numeric:tabular-nums}.chapter-head .eyebrow{color:var(--fp-muted);margin-bottom:24px}.chapter-head h2{font-size:clamp(2rem,3.4vw,3.8rem)}.chapter-lead{font-size:18px;line-height:1.5;color:var(--fp-muted);max-width:620px;margin-top:20px}.prose{max-width:820px;margin-top:48px}.prose>h3{font-family:var(--fp-font-body);font-size:20px;font-weight:600;letter-spacing:var(--fp-tracking-title);line-height:1.3;margin:36px 0 16px}.prose>h3:first-child{margin-top:0}.prose p{margin:14px 0;color:var(--fp-muted);line-height:1.75;font-size:15px}.prose strong{color:var(--fp-text)}.prose ul,.prose ol{padding-left:22px;margin:18px 0}.prose li{margin:10px 0;padding-left:4px;color:var(--fp-muted);font-size:15px;line-height:1.75}.prose 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p{margin-top:12px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:11px 24px;border:1px solid transparent;border-radius:999px;text-decoration:none;font-size:14px;font-weight:500;line-height:24px;color:var(--fp-text);background:var(--fp-subtle);transition:background var(--fp-fast),transform var(--fp-fast),border-color var(--fp-fast);max-width:100%;text-align:center}.btn:hover{text-decoration:none;background:var(--fp-subtle)}.btn:active{transform:translateY(1px)}.btn.primary{color:var(--fp-action-text);background:var(--fp-action)}.btn.primary:hover{background:var(--fp-action-hover)}.btn.primary:active{background:var(--fp-action-active)}.btn.outline{border-color:var(--fp-border);background:transparent}.btn.outline:hover{background:var(--fp-subtle)}.btn:disabled{background:var(--fp-disabled-bg);color:var(--fp-disabled-text);border-color:var(--fp-line);transform:none}.btn[aria-busy=true]{min-width:210px}.button-row{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin:20px 0}.state-strip{display:flex;flex-wrap:wrap;gap:16px;margin-top:32px;padding-top:28px;border-top:1px solid var(--fp-line)}.state-pill{display:inline-flex;padding:10px 20px;border-radius:999px;background:var(--fp-action);color:var(--fp-action-text);font-size:13px}.hover-state{background:var(--fp-action-hover)}.active-state{background:var(--fp-action-active)}.focus-state{outline:3px solid var(--fp-focus);outline-offset:3px}.spinner{display:inline-block;width:16px;height:16px;border:2px solid currentColor;border-right-color:transparent;border-radius:100%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.logo-gallery{display:grid;grid-template-columns:1fr 1fr;gap:16px}.logo-plate{min-height:220px;border:1px solid var(--fp-line);border-radius:12px;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:36px;padding:32px}.logo-plate img{width:min(100%,290px);height:64px;object-fit:contain}.logo-plate span{font-size:11px;letter-spacing:.04em}.fixed-light{background:#FAF9F6;color:#191C19}.fixed-dark{background:#111512;color:#F5F4ED}.accent-plate{grid-column:1/-1;background:#F04B24;color:#191C19;min-height:170px;flex-direction:row}.logo-plate .standalone{width:45px;height:66px}.swatch-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.swatch{padding:0;text-align:left;background:var(--fp-surface);color:var(--fp-text);border:1px solid var(--fp-line);border-radius:8px;overflow:hidden}.swatch-color{display:block;height:104px;border-bottom:1px solid var(--fp-line)}.swatch-meta{display:block;padding:16px}.swatch-name{font-size:12px;display:block;font-weight:500}.swatch-hex{display:block;font-family:ui-monospace,monospace;font-size:11px;color:var(--fp-muted);margin-top:4px}.swatch:hover .swatch-name{text-decoration:underline;text-underline-offset:4px}.material-pair{display:grid;grid-template-columns:1fr 1fr;gap:16px}.material-pair figure,.wide-material{margin:0}.material-pair 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var(--fp-line);background:var(--fp-canvas);border-radius:8px;overflow:hidden}.grid-demo{display:grid;grid-template-columns:repeat(12,1fr);gap:12px;padding:20px 24px;background:var(--fp-accent-soft)}.grid-demo span{background:var(--fp-action);opacity:.2;min-height:64px}.editorial-demo{padding:36px 24px;display:grid;grid-template-columns:1fr 1fr;gap:32px}.editorial-demo p{font-size:14px;color:var(--fp-muted)}@container(max-width:480px){.editorial-demo{grid-template-columns:1fr}.grid-demo{grid-template-columns:repeat(4,1fr)}.grid-demo span:nth-child(n+5){display:none}}.spacing-bars{display:grid;gap:12px}.space-row{display:flex;align-items:center;gap:24px;min-height:24px}.space-row span{font-size:12px;font-variant-numeric:tabular-nums;min-width:48px}.space-row i{display:block;height:12px;background:var(--fp-action);max-width:calc(100% - 75px);border-radius:2px}.surface-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.surface{padding:24px 20px;min-height:170px;border:1px solid var(--fp-line);border-radius:12px;font-size:13px}.surface strong{display:block}.surface p{margin-top:12px;color:var(--fp-muted)}.surface.canvas{background:var(--fp-canvas)}.surface.subtle{background:var(--fp-subtle)}.surface.raised{background:var(--fp-surface)}.surface.floating{background:var(--fp-surface);box-shadow:var(--fp-shadow-float);border-color:var(--fp-border)}.link-specimen{display:flex;align-items:flex-start;flex-direction:column;gap:24px}.link-specimen a{display:inline-flex;gap:12px;align-items:center}.input-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}.field{display:flex;flex-direction:column;gap:8px;min-width:0}.field label{font-size:14px;font-weight:500}.field label span{font-weight:400;color:var(--fp-muted)}.field .hint,.field .error-text{margin:0}.field input,.field textarea,.field select{min-height:48px;width:100%;min-width:0;padding:11px 16px;border:1px solid var(--fp-border);border-radius:8px;background:var(--fp-surface);color:var(--fp-text);line-height:24px;font-size:16px}.field textarea{min-height:144px;resize:vertical}.field input:hover,.field textarea:hover,.field select:hover{border-color:var(--fp-text)}.field input::placeholder,.field textarea::placeholder{color:var(--fp-muted);opacity:1}.field input[aria-invalid=true],.field textarea[aria-invalid=true]{border-color:var(--fp-error);border-width:2px;padding:10px 15px}.field input[readonly]{background:var(--fp-subtle)}.error-text{font-size:14px;color:var(--fp-error);line-height:1.5}.selection-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}.selection-grid>.field{grid-column:1/-1;max-width:380px}fieldset{border:0;padding:0;margin:0;min-width:0}legend{font-size:14px;font-weight:600;padding:0;margin-bottom:12px}.choice{display:flex;gap:12px;align-items:center;min-height:44px;font-size:14px;cursor:pointer}.choice 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button{background:none;color:var(--fp-muted);border:0;border-bottom:2px solid transparent;padding:12px 16px;min-height:48px;font-size:14px}.tabs button[aria-selected=true]{color:var(--fp-text);border-color:var(--fp-action)}.tab-panel{padding:32px 0;max-width:620px}.tab-panel h3{font-size:26px}.tab-panel p{color:var(--fp-muted);font-size:15px}dialog{padding:32px;border:1px solid var(--fp-border);border-radius:16px;background:var(--fp-surface);color:var(--fp-text);max-width:520px;width:calc(100% - 48px);box-shadow:var(--fp-shadow-float)}dialog::backdrop{background:rgb(9 15 11/.7)}.dialog-top{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:32px}dialog h3{font-size:40px}dialog p{margin:24px 0;color:var(--fp-muted)}.service-demo{display:grid;grid-template-columns:1fr 2fr;gap:32px;padding:40px 0;border-top:1px solid var(--fp-border);border-bottom:1px solid var(--fp-line)}.service-demo h3{font-size:36px}.service-demo p{margin:20px 0;color:var(--fp-muted);font-size:15px}.service-demo a,.work-demo a{font-size:13px;display:inline-flex;gap:10px;align-items:center}.work-demo{margin-top:32px;display:grid;grid-template-columns:140px 1fr;gap:28px;background:var(--fp-subtle);padding:28px;border-radius:12px;max-width:760px}.work-demo h3{font-size:26px;margin-top:14px}.work-demo p{font-size:14px;color:var(--fp-muted);margin:14px 0}.work-art{background:var(--fp-accent-soft);border-radius:8px;min-height:140px;display:flex;align-items:center;justify-content:center;gap:8px;overflow:hidden}.work-art span{width:16px;background:var(--fp-action);height:55px;border-radius:4px}.work-art span:nth-child(2){height:90px}.work-art span:nth-child(3){height:120px}.download-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.download-card{padding:24px;border:1px solid var(--fp-border);border-radius:12px;display:flex;align-items:flex-start;flex-direction:column;gap:12px;text-decoration:none;color:var(--fp-text);background:var(--fp-surface);min-height:170px}.download-card:hover{background:var(--fp-subtle);text-decoration:none}.download-card strong{font-size:16px}.download-card span{font-size:13px;color:var(--fp-muted)}.guide-footer{background:#F04B24;color:#191C19;padding:88px clamp(32px,5vw,96px) 32px}.guide-footer h2{margin:36px 0;font-size:clamp(2.6rem,5vw,5.6rem)}.ink-btn{background:#191C19;color:#FFFFFF}.ink-btn:hover{background:#303730}.guide-footer a:focus-visible{outline-color:#191C19}.footer-meta{display:flex;justify-content:space-between;gap:24px;font-size:12px;border-top:1px solid rgb(25 28 25/.4);margin-top:96px;padding-top:24px}.footer-meta a{color:#191C19}.toast{position:fixed;bottom:24px;right:24px;z-index:60;display:flex;align-items:center;gap:24px;max-width:calc(100% - 48px);padding:12px 16px 12px 24px;background:var(--fp-surface);color:var(--fp-text);border:1px solid var(--fp-border);box-shadow:var(--fp-shadow-float);border-radius:12px;font-size:14px}.toast .icon-btn{background:transparent;border-color:transparent}.guide-footer .btn{font-size:14px}
@media(min-width:1800px){.cover-copy{padding-left:max(96px,calc((100% - 1248px)/2))}.cover-bottom{left:max(96px,calc((100% - 1248px)/2))}}
@media(max-width:1200px){.sidebar{width:224px}.sidebar-head{padding-left:20px}.sidebar nav a{font-size:11px;gap:10px}.sidebar-download{padding-left:20px}main{margin-left:224px}.cover h1{font-size:clamp(4rem,7.5vw,7rem)}.chapter{padding-left:36px;padding-right:36px}.swatch-grid,.surface-grid{grid-template-columns:repeat(2,1fr)}.cover{min-height:680px}}
@media(max-width:960px){.sidebar{display:none;width:320px;max-width:100%;box-shadow:8px 0 32px rgb(0 0 0/.1)}.sidebar.is-open{display:flex}.menu-toggle{display:flex}main{margin-left:0}.topbar{padding:0 24px;gap:24px}.cover h1{font-size:clamp(4.5rem,10vw,7.5rem)}.cover-copy{padding-left:48px}.cover-bottom{left:48px;right:48px}.chapter,.intro{padding-left:48px;padding-right:48px}.sidebar nav a{font-size:13px;min-height:44px}.chapter-head h2{font-size:42px}.cover{max-height:900px}}
@media(max-width:600px){html{scroll-padding-top:88px}.topbar{height:72px;padding:0 20px;gap:16px}.brand,.brand img{width:156px;height:auto}.topbar-title{display:none}.topbar-actions{gap:8px}.theme-control select{width:82px;padding-left:10px;font-size:12px}.theme-control svg{width:14px;right:8px}.icon-btn{min-width:var(--fp-control-height-small);min-height:var(--fp-control-height-small)}.sidebar{top:72px}.cover{height:auto;min-height:720px;max-height:none}.cover-copy{padding:64px 24px 170px;max-width:100%}.cover-copy .eyebrow{font-size:10px;margin-bottom:48px}.cover h1{font-size:clamp(3.6rem,13.5vw,5.2rem)}.cover-deck{font-size:19px;margin-top:28px}.cover-material{object-position:58% center;opacity:.68}.cover:after{background:var(--fp-gradient-guide-cover-mobile)}[data-theme=dark] .cover:after{background:var(--fp-gradient-guide-cover-mobile)}.cover-bottom{left:24px;right:24px;bottom:24px;flex-direction:column;gap:8px;font-size:9px}.intro{padding:64px 24px}.intro h2{font-size:36px}.intro>p:not(.eyebrow){font-size:16px}.intro-links{gap:20px;flex-direction:column}.chapter{padding:64px 24px;scroll-margin-top:72px}.chapter-head{gap:12px;margin-bottom:32px}.chapter-head .eyebrow{font-size:9px;margin-bottom:20px}.chapter-head h2{font-size:34px}.chapter-number{font-size:10px}.chapter-lead{font-size:16px}.prose{margin-top:32px}.prose p,.prose li{font-size:14px}.prose>h3{font-size:18px}.specimen{padding:22px 18px}.logo-gallery,.material-pair,.input-grid,.selection-grid,.feedback-grid,.contrast-tool,.download-grid{grid-template-columns:1fr}.logo-plate{min-height:180px}.accent-plate{grid-column:auto;min-height:140px}.swatch-grid{gap:12px}.swatch-color{height:88px}.swatch-meta{padding:12px}.swatch-name{font-size:11px}.surface-grid{gap:12px}.surface{min-height:150px;padding:20px 16px}.button-row{align-items:stretch;flex-direction:column}.button-row .btn{width:100%}.state-strip{gap:16px}.state-pill{font-size:11px;padding:8px 14px}.display-sample{font-size:48px}.type-scale div{gap:16px}.type-scale span{min-width:55px;font-size:10px}.type-scale div:nth-child(1) strong{font-size:30px}.type-scale div:nth-child(2) strong{font-size:24px}.type-controls{gap:16px}.editorial-demo{padding:24px 18px;gap:20px}.service-demo{grid-template-columns:1fr;gap:24px;padding:28px 0}.service-demo h3{font-size:30px}.work-demo{grid-template-columns:1fr;padding:22px;gap:22px}.work-art{min-height:100px;height:100px;justify-content:flex-start;padding-left:32px}.work-art span:nth-child(3){height:80px}.work-art span:nth-child(2){height:60px}.work-art span{height:40px}.work-demo h3{font-size:24px}.tabs{gap:0}.tabs button{padding:10px 12px;font-size:13px}.tab-panel h3{font-size:24px}.guide-footer{padding:64px 24px 28px}.guide-footer h2{font-size:40px}.footer-meta{flex-direction:column;gap:12px;margin-top:64px}.toast{bottom:16px;right:16px;max-width:calc(100% - 32px);gap:12px;padding-left:16px;font-size:13px}dialog{padding:24px}dialog h3{font-size:32px}.inquiry-form>.btn{width:100%}}
@media(max-width:359px){.topbar{padding:0 16px;gap:8px}.brand,.brand img{width:136px}.theme-control select{width:72px;padding-left:8px}.topbar-actions{gap:6px}.cover h1{font-size:3.5rem}.chapter-head h2{font-size:30px}.intro h2{font-size:32px}.surface-grid{grid-template-columns:1fr}.btn{padding-left:18px;padding-right:18px}.tabs button{padding:10px;font-size:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}.spinner{border-right-color:currentColor;border-style:dotted}}
@media(forced-colors:active){.btn,.state-pill,.feedback,.swatch,.choice input{border:1px solid ButtonText}.cover-material{display:none}.tabs button[aria-selected=true]{border-bottom:3px solid Highlight}.switch-choice input:checked:after{background:Highlight}.work-art{border:1px solid CanvasText}}
@media print{.topbar,.sidebar,.toast,.skip-link,.cover .btn,.intro-links{display:none}main{margin:0}.cover{height:400px;min-height:400px}.cover-copy{padding:40px}.cover h1{font-size:64px}.cover-copy .eyebrow{margin-bottom:24px}.cover-deck{margin-top:20px}.cover-bottom{display:none}.chapter,.intro{padding:32px 0;border-bottom:1px solid #ccc}.chapter-head h2{font-size:30px}.prose{max-width:none}body{background:#fff;color:#191c19}.specimen,table,.feedback{break-inside:avoid}.table-scroll{overflow:visible}.guide-footer{padding:40px}.chapter{break-before:page}}
/* Specimen-specific layouts */
.row{display:flex;justify-content:space-between;gap:20px;align-items:center;font-size:13px}.row.wrap{flex-wrap:wrap}.row select{min-height:var(--fp-control-height-small);max-width:100%;border:1px solid var(--fp-border);border-radius:8px;background:var(--fp-surface);color:var(--fp-text);padding:7px 12px;font-size:14px}.type-lab input[type=range]{width:100%;margin:24px 0 8px;accent-color:var(--fp-action)}.type-scale p{margin:0}.type-scale .type-h2{font-family:var(--fp-font-display);font-size:36px;line-height:1.15;letter-spacing:var(--fp-tracking-heading)}.type-scale .lead{font-size:24px;line-height:1.5}.type-scale>p:not([class]){font-size:18px;line-height:1.65}.spacing-bars>div{display:flex;gap:24px;align-items:center;min-height:24px}.spacing-bars code{min-width:52px;color:var(--fp-muted);font-size:12px}.spacing-bars>div>span{display:block;height:12px;max-width:calc(100% - 76px);background:var(--fp-action);border-radius:2px}.grid-demo span{display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:600;opacity:1;background:color-mix(in srgb,var(--fp-action) 12%,transparent);color:var(--fp-action)}#contrast-preview{display:flex;flex-direction:column;justify-content:center;gap:10px;padding:28px;min-height:170px;border:1px solid var(--fp-border);border-radius:8px;background:#FAF9F6;color:#191C19}#contrast-preview strong{font-size:72px;font-family:var(--fp-font-display);line-height:1}#contrast-preview span{font-size:14px}#contrast-result{font-size:24px;line-height:1.5;letter-spacing:-.02em}#contrast-hint{grid-column:1/-1;margin:0}.chapter-head h2,.cover h1,.intro h2,.guide-footer h2{font-weight:400}
@media(max-width:960px){.sidebar.is-open{position:relative;top:auto;width:100%;max-height:65vh;box-shadow:none;border-bottom:1px solid var(--fp-line)}.sidebar.is-open nav{display:grid;grid-template-columns:1fr 1fr}.sidebar.is-open .sidebar-head{padding:24px}.sidebar.is-open .sidebar-download{display:none}}
@media(max-width:600px){.type-scale .type-h2{font-size:28px}.type-scale .lead{font-size:20px}.sidebar.is-open nav{grid-template-columns:1fr}.sidebar.is-open{max-height:60vh}#contrast-result{font-size:22px}}

#loading-demo{min-width:224px}.spinner{width:20px;height:20px}.btn{font-size:16px;gap:8px}.cover .btn{min-height:56px;padding-inline:28px}.cover-material{pointer-events:none}.theme-switching *{transition:none!important}

.chapter{scroll-margin-top:0}

/* Core button variants: primary, secondary, outline, ghost, text/link. */
.btn.secondary{background:var(--fp-subtle);color:var(--fp-text);border-color:transparent}
.btn.secondary:hover{background:color-mix(in srgb,var(--fp-text) 12%,var(--fp-surface))}
.btn.secondary:active{background:color-mix(in srgb,var(--fp-text) 18%,var(--fp-surface))}
.btn.ghost{background:transparent;border-color:transparent;color:var(--fp-text)}
.btn.ghost:hover,.btn.outline:active{background:var(--fp-subtle)}
.btn.ghost:active{background:color-mix(in srgb,var(--fp-text) 12%,var(--fp-surface))}
.btn.text-link{background:transparent;border-color:transparent;color:var(--fp-action);padding-inline:4px;text-decoration:underline;text-underline-offset:5px;border-radius:4px}
.btn.text-link:hover{background:transparent;text-decoration-thickness:2px;color:var(--fp-action-hover)}
.btn.text-link:active{color:var(--fp-action-active)}
.btn:disabled{background:var(--fp-disabled-bg);color:var(--fp-disabled-text);border-color:var(--fp-line)}
/* Long reference chapters navigate directly; controls retain their brief response. */
html{scroll-behavior:auto}

/* Basis identity and the persistent return to the studio. */
.brand.basis-brand{display:inline-flex;align-items:center;width:auto;gap:10px;flex-shrink:0;color:var(--fp-text);text-decoration:none}.brand.basis-brand img{width:22px;height:32px;object-fit:contain}.basis-brand strong{font:550 30px/1 var(--fp-font-display);letter-spacing:var(--fp-tracking-heading)}.system-back{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:40px;font-size:13px;text-decoration:none;white-space:nowrap}.system-back:hover{text-decoration:underline}.system-back svg{flex-shrink:0}@media(max-width:760px){.system-back{width:40px;height:40px;border-radius:50%;border:1px solid var(--fp-line)}.system-back span{display:none}.topbar-title{display:none}}@media(max-width:359px){.basis-brand strong{font-size:26px}.brand.basis-brand{gap:8px}.brand.basis-brand img{width:18px;height:28px}}