/* Locally hosted, open-license Manrope. No external font request. */
@font-face{font-family:Manrope;src:url('../fonts/manrope-variable.ttf') format('truetype');font-style:normal;font-weight:200 800;font-display:swap}
body{font-family:Manrope,'Segoe UI',Arial,sans-serif;font-size:16px;line-height:1.78;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{font-weight:750;letter-spacing:-.035em;line-height:1.18;text-wrap:balance}
h1{font-weight:800}.eyebrow,.hero-notes{font-family:Manrope,'Segoe UI',sans-serif;letter-spacing:.1em}.menu a{font-weight:600}.brand{letter-spacing:-.035em}
.shell{width:min(1240px,calc(100% - 64px))}.page-shell{padding-block:48px 84px}.page-heading,.page-hero{width:100%;max-width:none;margin-bottom:32px;padding:clamp(28px,5vw,60px);border-radius:24px}.page-heading h1,.page-hero h1{margin-top:.3em;margin-bottom:.45em;max-width:980px}.page-heading p:last-child,.page-hero p:last-child{margin-bottom:0;max-width:820px}
.home-hero{padding-block:54px 64px}.home-hero-grid{grid-template-columns:minmax(0,1fr);gap:32px;align-items:start}.home-hero-copy{width:100%;max-width:none}.home-hero-copy h1{font-size:clamp(2.6rem,5vw,4.6rem);max-width:1000px;line-height:1.09}.home-hero-copy .hero-description{max-width:780px;margin:22px 0}.home-hero-copy .hero-notes{margin-top:25px}.home-hero .home-calculator{width:100%;max-width:none}.home-hero .tool-card{padding:clamp(22px,3vw,34px)}.home-hero .grade-row{grid-template-columns:minmax(100px,1fr) minmax(100px,1fr) minmax(100px,1fr) auto}
.submenu-toggle{border:0;border-radius:6px;width:30px;height:30px;background:transparent}.submenu-chevron{width:8px;height:8px;border-right:1.8px solid currentColor;border-bottom:1.8px solid currentColor;transform:translateY(-2px) rotate(45deg);transition:transform .18s ease}.submenu-toggle[aria-expanded=true] .submenu-chevron{transform:translateY(2px) rotate(225deg)}
.tool-layout{gap:28px}.tool-card,.tool-aside{padding:30px;box-shadow:0 10px 35px #153b2b08}.tool-card input,.tool-card select,.contact-form input,.contact-form textarea{min-height:48px}.calculator-form label{line-height:1.5}.grade-row{padding-block:18px}.button{gap:12px;min-height:48px}.button:disabled{opacity:.65;cursor:wait}.mode-tabs{gap:10px;margin-bottom:22px}.mode-tab{font-weight:650;padding:10px 17px}.workspace-tabs{margin-bottom:18px}.target-panel{margin-top:30px;padding:24px}.form-grid{gap:20px}.result-box{line-height:1.6;padding:20px}.reading-width{width:100%;max-width:840px;margin-inline:auto}.guide-content{padding-top:56px}.entry-content{font-size:1.025rem;line-height:1.9}.entry-content h2{font-size:clamp(1.65rem,2.6vw,2.15rem);margin:2em 0 .8em}.entry-content h3{font-size:1.2rem;line-height:1.4}.entry-content p{margin-bottom:1.35em}.entry-content a{font-weight:600}.guide-outline{background:var(--soft);border:1px solid var(--line);padding:20px 24px;border-radius:14px;margin-bottom:36px}.guide-outline summary{font-weight:750;cursor:pointer}.guide-outline ul{padding-left:20px;margin-bottom:0;columns:2;column-gap:30px}.guide-outline li{font-size:.87rem;break-inside:avoid;margin:.6em 0}.guide-outline a{text-decoration:none}.contact-status{margin:0;padding:14px 18px;border-radius:10px;background:var(--soft)}.contact-status:empty{display:none}.contact-status.is-error{color:#a01830;background:#fff0f2}.contact-panel{max-width:860px}.contact-panel .contact-form{gap:22px}
.home-intro{padding-top:54px}.home-section{padding-block:60px;border-top:1px solid var(--line);margin-top:52px}.home-section+.home-section{margin-top:0}.section-heading{max-width:790px;margin-bottom:30px}.section-heading h2{margin:.35em 0 .55em;font-size:clamp(1.9rem,3.5vw,3rem)}.section-heading>p:last-child{color:var(--muted);margin-bottom:0}.feature-grid,.formula-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.feature-grid article,.formula-grid article,.audience-grid article{padding:30px;background:var(--surface);border:1px solid var(--line);border-radius:18px}.feature-grid h3,.formula-grid h3,.audience-grid h3{font-size:1.25rem;margin:16px 0}.feature-grid p,.formula-grid p,.audience-grid p{color:var(--muted);font-size:.94rem}.step-number{display:inline-grid;place-items:center;background:var(--glow);color:var(--accent);font-size:1.1rem;font-weight:800;width:44px;height:44px;border-radius:12px}.formula-grid .formula-display{font-family:ui-monospace,Consolas,monospace;color:var(--accent);padding:15px;background:var(--soft);border-radius:10px;font-size:.85rem;line-height:1.65}.formula-grid a{font-size:.86rem;font-weight:750;text-decoration:none}.audience-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.comparison-card{display:grid;grid-template-columns:1fr 1fr;background:var(--soft);border:1px solid var(--line);border-radius:22px;overflow:hidden}.comparison-card>div{padding:clamp(26px,4vw,44px)}.comparison-card>div+div{border-left:1px solid var(--line)}.comparison-value{display:block;font-size:clamp(2.7rem,5vw,4rem);font-weight:800;letter-spacing:-.05em;color:var(--accent);line-height:1.3}.comparison-value span{font-size:.5em;margin-left:3px}.comparison-card h3{margin:14px 0}.comparison-card p{color:var(--muted);margin:0;max-width:520px}.section-note{margin:22px 0 0;color:var(--muted);max-width:880px;font-size:.95rem}.faq-list{max-width:980px}.faq-list details{background:var(--surface);border:1px solid var(--line);border-radius:13px;margin-bottom:12px;padding:20px 24px}.faq-list summary{cursor:pointer;font-weight:750;font-size:1.03rem}.faq-list p{margin:16px 0 0;color:var(--muted);max-width:80ch;font-size:.96rem}.home-content{padding-bottom:20px}.home-guides{padding-bottom:20px}.post-content{font-size:1.03rem;line-height:1.9}.footer-grid{padding-block:56px}.footer-column a{line-height:1.7}.scale-lookup-controls{grid-template-columns:minmax(0,1fr) auto}.scale-lookup-controls label{display:grid;gap:8px}.scale-editor label{display:grid;gap:8px;font-weight:650}.scale-editor input{width:100%}.scale-preview{max-height:360px}
@media(max-width:1050px){.feature-grid,.formula-grid{grid-template-columns:1fr}.feature-grid article,.formula-grid article{padding:26px}.tool-card,.tool-aside{padding:24px}.header-actions{gap:12px}#site-navigation .menu{gap:14px}}
@media(max-width:760px){.shell{width:calc(100% - 36px)}.page-shell{padding-block:30px 52px}.page-heading,.page-hero{padding:28px 22px;border-radius:18px}.home-hero{padding-block:32px 40px}.home-hero-grid{gap:24px}.home-hero-copy h1{font-size:clamp(2.3rem,9vw,3.8rem)}.home-hero .grade-row{grid-template-columns:1fr}.home-hero .tool-card,.tool-card,.tool-aside{padding:20px}.home-intro{padding-top:34px}.home-section{padding-block:38px;margin-top:36px}.audience-grid,.comparison-card{grid-template-columns:1fr}.comparison-card>div+div{border-left:0;border-top:1px solid var(--line)}.guide-outline ul{columns:1}.guide-content{padding-top:36px}.form-grid{gap:16px}.faq-list details{padding:18px 20px}.entry-content{font-size:1rem}.scale-lookup-controls{grid-template-columns:1fr}.scale-lookup-controls label,.scale-lookup-controls .button{grid-column:auto}.target-panel{padding:18px}.home-hero .target-panel{padding:18px}.home-hero .workspace-tabs{width:100%}.home-hero .workspace-tabs [role=tab]{flex:1 1 0;padding:10px 6px}.post-hero-copy h1{font-size:clamp(2.2rem,7.5vw,3.4rem)}}
@media(max-width:480px){.header-inner{gap:8px;flex-wrap:nowrap}.header-actions{gap:8px}.header-inner .brand{font-size:.8rem;gap:8px}.header-inner .brand-mark{width:34px;height:34px;font-size:1.45rem;flex-shrink:0}.header-actions .icon-button{width:36px;height:36px}.header-inner .brand small{font-size:.6rem}.workspace-tabs [role=tab]{min-height:44px}.mode-tabs{gap:7px}.mode-tab{font-size:.84rem;padding:9px 12px}.scale-lookup{padding:18px}}
@media(prefers-reduced-motion:reduce){.submenu-chevron{transition:none}}