/* A compact course directory beside the covers; all four views share one course. */
.teacher-materials .ppt-collection{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:5vw;padding-top:0;padding-bottom:26px;align-items:center}
.teacher-materials .ppt-intro{max-width:none;min-width:0}
.teacher-materials .ppt-intro .eyebrow{margin-bottom:10px}
.teacher-materials .ppt-intro h3{font-size:clamp(26px,2.2vw,34px);line-height:1.45;letter-spacing:-.025em;margin-bottom:10px}
.teacher-materials .ppt-intro>p:not(.eyebrow){max-width:440px;color:#73776e;font-size:14px;line-height:1.85}
.teacher-materials .ppt-cover-stack{aspect-ratio:1.9;max-width:700px;margin:0 0 0 auto}
.teacher-materials .ppt-cover{width:77%;left:calc(var(--depth)*3%);top:calc(var(--depth)*1.8%);z-index:calc(12 - var(--depth));box-shadow:0 5px 18px #17281b13;border:1px solid #e0e2db}
.teacher-materials .ppt-cover.is-selected{width:83%;left:2%;top:10%;z-index:20;box-shadow:0 14px 28px #17281b21}
.teacher-materials .ppt-cover button{display:block;width:100%;padding:0;margin:0;border:0;background:white;cursor:pointer}
.teacher-materials .ppt-cover button:focus-visible{outline:2px solid #405b32;outline-offset:5px}
.teacher-materials .ppt-cover img{width:100%;height:auto;aspect-ratio:16/9;object-fit:contain}
.teacher-materials .ppt-cover-selector{grid-template-columns:1fr 1fr;column-gap:20px;margin:18px 0 0;max-width:none}
.teacher-materials .ppt-cover-selector button{font-size:14px;gap:9px;padding-block:9px;min-height:42px}
.teacher-materials .ppt-cover-selector button[aria-pressed=true]{font-weight:500}
.teacher-materials .document-grid{border-top:1px solid #d8dcd2;padding-top:22px;align-items:start;gap:26px}
.teacher-materials .document-grid h3{font-size:20px;margin-bottom:5px}
.teacher-materials .document-grid p{font-size:13px;margin-bottom:14px;color:#74796f}
.teacher-materials .document-grid img{display:block;width:100%;height:auto;max-height:none;object-fit:contain;padding:0;background:white;border:1px solid #e4e7df;box-shadow:0 5px 15px #17281b08}
.teacher-materials .ppt-cover-stack,.teacher-materials .teacher-document-visual{opacity:1;transition:opacity 900ms ease}
.teacher-materials.is-changing .ppt-cover-stack,.teacher-materials.is-changing .teacher-document-visual{opacity:0;transition-duration:450ms}
@media(max-width:1100px){.teacher-materials .ppt-collection{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:32px}.teacher-materials .ppt-cover-selector{column-gap:14px}.teacher-materials .ppt-cover-selector button{font-size:13px;gap:7px}.teacher-materials .document-grid{gap:20px}}
@media(max-width:800px){.teacher-materials .ppt-collection{grid-template-columns:1fr;gap:24px}.teacher-materials .ppt-intro>p:not(.eyebrow){max-width:none}.teacher-materials .ppt-intro h3{font-size:28px}.teacher-materials .ppt-cover-stack{max-width:600px;margin:auto}.teacher-materials .ppt-cover-selector{column-gap:28px}.teacher-materials .ppt-cover-selector button{font-size:14px}.teacher-materials .document-grid h3{font-size:18px}.teacher-materials .document-grid p{font-size:12px;min-height:40px}}
@media(max-width:600px){.teacher-materials .ppt-collection{gap:20px;padding-bottom:22px}.teacher-materials .ppt-intro h3{font-size:26px}.teacher-materials .ppt-cover-selector{gap:0 14px;margin-top:14px}.teacher-materials .ppt-cover-selector button{font-size:12px;gap:6px;min-height:44px;padding-block:10px}.teacher-materials .ppt-cover-selector button>span{font-size:9px}.teacher-materials .document-grid{gap:26px;padding-top:22px}.teacher-materials .document-grid p{min-height:0;font-size:13px;margin-bottom:12px}.teacher-materials .document-grid h3{font-size:20px}}
@media(prefers-reduced-motion:reduce){.teacher-materials .ppt-cover-stack,.teacher-materials .teacher-document-visual{transition:none}}