:root{--plum:#170e1b;--surface:#24182b;--pink:#ff79bd;--cream:#fff6ec;--ink:#321c35;--muted:#c5b3c8;--line:#4c3654;color-scheme:dark}*{box-sizing:border-box}body{margin:0;background:var(--plum);color:var(--cream);font-family:Rubik,Arial,sans-serif;line-height:1.6}button,input,textarea,select{font:inherit}button,a,input,textarea{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}button{cursor:pointer}button:disabled{cursor:wait;opacity:.5}[hidden]{display:none!important}:focus-visible{outline:3px solid var(--pink);outline-offset:4px}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(32px,3.1vw,52px);line-height:1.14;letter-spacing:-1.3px}h1 span,h2 em{color:var(--pink);font-style:normal}h2{line-height:1.25}.eyebrow{font-size:11px;letter-spacing:2px;color:var(--pink);font-weight:600;line-height:1.6}.muted{color:var(--muted)}.small{font-size:12px}.primary,.secondary{display:inline-flex;align-items:center;justify-content:center;gap:10px;border:1px solid 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.book-reference{margin:16px -8px 0;white-space:pre-line}.book-reference canvas{display:block;width:100%;height:auto;border-radius:10px}
/* Reading and touch targets stay comfortable across laptop, tablet and phone. */
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@media(max-width:1000px){.progress-stats{grid-template-columns:repeat(2,minmax(0,1fr))}}
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/* Keep course navigation readable beside the site-wide chat control. */
.brain-header>.oddcm-open-app{display:none}.brain-title{white-space:nowrap}.brain-header>a{flex-shrink:0}
@media(max-width:600px){.brain-header{gap:12px;padding:16px}.brain-header>.brain-brand{display:none}.brain-title{font-size:14px;letter-spacing:1px}.brain-header>.account-link{font-size:12px}.brain-header>#oddcat-help{flex-shrink:0}}