/* Private preview: established brand, clearer reading and focused interactions. */
[hidden]{display:none!important}html{scroll-behavior:auto}body{font-size:16px}h1{font-size:clamp(42px,6vw,82px)}h2{font-size:clamp(30px,4vw,48px)}h3{font-weight:650}p{max-width:70ch;overflow-wrap:anywhere}.section{padding:72px max(5%,calc((100vw - 1280px)/2))}.preview-bar{font-size:12px;letter-spacing:0;padding:10px 16px}.small,.micro{font-size:13px!important}.button{min-height:48px;font-size:14px;gap:12px;line-height:1.4;text-align:center}.button:hover{transform:none}.text-link{font-size:14px}button,a,input,select,textarea,summary{touch-action:manipulation}:focus-visible{outline:3px solid #ad482a;outline-offset:4px}header{height:88px}header nav{gap:24px;font-size:14px}.brand{font-size:25px}.preview-hero{min-height:0;gap:7%;padding:60px 7% 72px;align-items:center}.preview-hero h1{font-size:clamp(52px,6.8vw,96px)}.hero-copy 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small{font-size:12px}.sample-label{gap:8px;flex-wrap:wrap}.sample-note{margin-bottom:28px}.sample-grid{gap:20px}.sample-card:hover img{transform:none}.scope-list li{font-size:16px}.scope-list li:before{display:none}.contents-section p{font-size:16px}.reading p{margin:20px 0;font-size:16px}.reading h3{margin-top:32px}.file-list li{font-size:13px;overflow-wrap:anywhere}.page-intro h1{max-width:16ch}.page-intro>p{font-size:18px;max-width:60ch}.how-steps p{font-size:16px}.how-steps h2{font-size:34px}.checkout-layout{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:7%;padding-top:12px;align-items:start}.checkout-choice h2{margin:30px 0 15px}.checkout-choice .text-link{margin-top:20px}.order-card{padding:32px;background:#e1e6d9;border-radius:8px}.order-card h2{font-size:34px}.order-card p{margin:18px 0}.price{display:block;font:600 40px/1.2 var(--serif);margin:24px 0;color:var(--ink);overflow-wrap:anywhere}.order-card .button{width:100%}.facts{margin:30px 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p{margin:12px 0}.week-tasks article>span{font-size:14px;color:var(--muted)}.example-disclaimer{margin:24px 0}.questionnaire-wrap{max-width:880px;margin:auto;padding-top:0}.demo-notice{background:#e2e7d9;border-left:4px solid #55734c;padding:20px}.demo-notice p{font-size:15px;margin-top:8px}.form-progress{margin:32px 0}progress{display:block;width:100%;height:9px;margin-top:12px;accent-color:var(--ink)}fieldset{border:0;margin:0;padding:0;min-width:0}legend{font:700 32px/1.2 var(--serif);margin-bottom:24px;max-width:100%}.field{margin-bottom:26px}label{display:block;font-weight:600;margin-bottom:6px}label span{font-size:13px;font-weight:400;color:var(--muted)}.field-help{font-size:14px;margin-bottom:10px}input,select,textarea{font:inherit;width:100%;min-width:0;border:1px solid #929f8e;background:#fffefa;color:var(--ink);border-radius:4px;padding:12px;min-height:48px}textarea{resize:vertical}.day-fields{display:grid;grid-template-columns:repeat(3,1fr);gap:0 20px;margin-top:22px}.form-actions{display:flex;gap:20px;justify-content:space-between;margin-top:32px}.form-actions button:not(.button){padding:12px 24px;border:1px solid var(--ink);background:transparent;border-radius:4px}.text-button{border:0;background:transparent;text-decoration:underline;padding:14px 0;margin-top:12px;font-size:14px}.answer-review dt{font-weight:600;margin-top:24px}.answer-review dd{margin:8px 0;white-space:pre-wrap;overflow-wrap:anywhere}#form-error{border-left:4px solid #ae352a;background:#f9e7df;padding:16px;margin-bottom:24px;color:#81271e}[aria-invalid=true]{border:2px solid #ae352a}.community-content{display:grid;grid-template-columns:1fr 1.3fr;gap:9%;padding-top:0}.community-top{padding:32px;background:#e1e6d9;align-self:start}.community-top .button{margin:24px 0}.community-areas article{padding:28px 0;border-bottom:1px solid var(--line)}.community-areas article:first-child{padding-top:0}.community-areas h2{font-size:36px;margin-bottom:18px}.community-areas p{font-size:17px}#invite-status{font-size:14px}dialog{width:min(850px,94vw);max-height:90vh;overflow:auto}#sample-title{font-size:26px}#sample-source{font-size:13px;overflow-wrap:anywhere}#sample-full{font-size:14px}#sample-text{white-space:pre-wrap;overflow-wrap:anywhere;font:15px/1.6 var(--sans)}.dialog-top{position:sticky;top:0;background:var(--paper);z-index:2}.dialog-top button{min-height:44px;flex-shrink:0}#mobile-menu a{font-size:16px;min-height:48px}footer{padding-top:48px}
@media(max-width:1000px){.subject-grid{grid-template-columns:repeat(3,1fr)}header nav{gap:16px;font-size:13px}.preview-hero{gap:5%}.preview-hero h1{font-size:64px}.product-hero{gap:5%}.purchase-row{flex-wrap:wrap}}
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@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.purchase-row .button{font-size:14px;min-height:48px;padding:14px 20px}.button:disabled{opacity:.55;cursor:not-allowed}.subject-card:hover .book{transform:rotate(-7deg) scale(.58)}.checkout-layout>*{min-width:0}.file-list li span:first-child{min-width:0}.form-progress{scroll-margin-top:24px}
/* Usability audit: preserve visual identity while strengthening control states. */
html{color-scheme:light}main:focus{outline:none}dialog{overscroll-behavior:contain}.sample-card{display:block}.field-error{color:#81271e;font-size:14px;margin-top:8px}.order-card p,.community-top p,.demo-notice p{color:var(--ink)}input,select,textarea{border-color:var(--muted)}.study-route :focus-visible,.access-panel :focus-visible{outline-color:var(--paper)}#sample-status{font-size:14px;min-height:1.65em}#sample-image{height:auto;width:100%}.file-section summary{gap:16px}.file-section summary span{flex-shrink:0}.price,.facts{font-variant-numeric:tabular-nums}
@media(max-width:760px){.text-link{display:inline-flex;align-items:center;min-height:44px}.footer-links a{padding-block:10px;min-height:44px}#sample-full{display:inline-flex;align-items:center;min-height:44px}.form-actions{flex-wrap:wrap}.form-actions .button{flex-basis:180px}header,.section,footer,.preview-hero{padding-left:max(6%,env(safe-area-inset-left));padding-right:max(6%,env(safe-area-inset-right))}}