/* A bounded reading surface with larger, comfortable course text. */
html{font-size:112.5%}
body{font-size:1rem;line-height:1.7;background:#e5e7e4}
.topbar,main,footer{width:min(1320px,calc(100% - 64px));margin-inline:auto}
main{background:var(--paper)}
.topbar{padding:1rem 2.5rem;gap:1rem}
.topbar nav{gap:1.4rem;flex-wrap:wrap}
.topbar nav a{font-size:.95rem}
.course-intro{min-height:0;padding:4rem 2.5rem;grid-template-columns:1.15fr 1fr;gap:2.5rem;align-items:center}
.course-intro h1{font-size:clamp(2.6rem,4.7vw,4.1rem);line-height:1.05}
.course-intro:after{display:none}
.intro-copy>p{font-size:1.25rem;line-height:1.6}
.book-credit p:last-child{font-size:1.1rem;line-height:1.65}
.book-credit .small-label{font-size:.85rem}
.workspace,.resources,.downloads,.student-perspectives,.comments{padding:3.5rem 2.5rem}
.section-head{align-items:center;flex-wrap:wrap;gap:1.25rem}
.section-head h2{font-size:clamp(2rem,3.8vw,3rem);line-height:1.1}
.lecture-layout{grid-template-columns:220px minmax(0,1fr);gap:2rem}
.lecture{grid-template-columns:2.2rem minmax(0,1fr) auto;gap:.8rem}
.lecture h3{font-size:1.15rem}
.lecture-deck{grid-column:3;grid-row:1;justify-self:end;font-size:1rem}
.lecture-meta,.lecture-support,.support-files strong,.lecture-references{font-size:1rem}
.filter,.tab,.download-pill,.quick-stats span{font-size:.95rem}
.eyebrow,.small-label,.file-icon{font-size:.8rem}
.perspectives-quotes{gap:2rem}
.perspectives-quotes blockquote p{font-size:1.1rem;line-height:1.6}
.perspectives-quotes figcaption,.evaluation-source,.evaluation-ratings dt,.comments .comment-note,.comment-meta{font-size:.9rem}
.resource-card{padding:1.3rem;min-width:0}
.resource-card h3{font-size:1.7rem;line-height:1.15}
.download-row{min-width:0;grid-template-columns:2.5rem minmax(0,1fr) auto}
.download-row small{font-size:.9rem}
.comments-layout{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:2rem}
footer{padding:1.5rem 2.5rem;font-size:.9rem;flex-wrap:wrap}
@media(max-width:1050px){
 .topbar,main,footer{width:calc(100% - 64px)}
 .lecture-layout{grid-template-columns:1fr}.lecture-layout .progress-card{display:none}
 .course-intro{grid-template-columns:1fr}.intro-copy{max-width:36rem}
 .resource-grid{grid-template-columns:1fr}.resource-card{min-height:210px}
}
@media(max-width:760px){
 .topbar,main,footer{width:calc(100% - 32px)}
 .topbar{position:relative;padding:1rem;flex-wrap:wrap}.topbar nav{gap:.6rem 1rem}
 .topbar nav a,.topbar nav a:nth-child(3){display:inline;font-size:.9rem}
 .course-intro,.workspace,.resources,.downloads,.student-perspectives,.comments{padding:2.5rem 1.2rem}
 .course-intro h1{font-size:clamp(2.2rem,7vw,3.5rem)}
 .perspectives-quotes,.file-list,.comments-layout{grid-template-columns:1fr}
 .section-head{align-items:flex-start}.search input{width:100%}
 .quick-stats{gap:1rem;flex-wrap:wrap}.evaluation-ratings{grid-template-columns:1fr}
 footer{padding:1.25rem}
 .lecture{grid-template-columns:2.2rem minmax(0,1fr)}
 .lecture-deck{grid-column:2;grid-row:auto;justify-self:start;white-space:normal}
}