/* Five stages: three activities, lesson recap, then class quiz. */
.material-tabs{grid-template-columns:repeat(5,minmax(0,1fr))}
.app-shell .material-tabs button{font-size:15px;gap:9px;padding:12px 10px}
.material-tabs button>span{min-width:0}
.summary-workspace{color:var(--ink);text-align:left;background:#fff}
.summary-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;padding:22px 28px;border-bottom:1px solid var(--line);background:#f0f7f9;flex-shrink:0}
.summary-heading h2{margin:0 0 6px;font-size:30px;line-height:1.2;letter-spacing:-.5px;color:var(--brand)}
.summary-heading p:not(.eyebrow){margin:0;font-size:16px;color:var(--muted)}
.summary-week{white-space:nowrap;padding:7px 12px;background:#fff;border:1px solid #bfd5dd;border-radius:7px;font-size:15px;font-weight:650;color:var(--brand)}
.summary-content{padding:24px 28px 18px;min-width:0}
.summary-video-frame{position:relative;aspect-ratio:16/9;min-height:200px;max-width:1000px;margin:auto;background:#102e3b;border:1px solid #9cbec9;border-radius:12px;overflow:hidden;box-shadow:0 8px 25px #00658012}
.summary-video-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.summary-caption{display:flex;align-items:center;justify-content:space-between;gap:20px;max-width:1000px;margin:19px auto 0}
.summary-caption h3{margin:6px 0;font-size:20px;line-height:1.35}
.summary-caption p{font-size:15px;color:var(--muted);margin:0;line-height:1.5}
.summary-example,.summary-type{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.3px;padding:4px 8px;border-radius:4px;background:var(--brand-red-soft);color:var(--brand-red-ink)}
.summary-type{background:var(--brand-soft);color:var(--brand)}
.summary-youtube{white-space:nowrap;color:var(--brand);font-weight:650;font-size:16px;text-decoration:none;padding:10px 14px;border:1px solid #93b5c0;border-radius:7px;background:white}
.summary-youtube:hover{border-color:var(--brand-red);background:var(--brand-red-soft)}
.summary-footer{display:flex;align-items:center;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding:16px 28px;background:#f7fafb;flex-shrink:0}
.summary-footer p{margin:0;color:var(--muted);font-size:14px}
.summary-next{white-space:nowrap;background:var(--brand);color:#fff;border:2px solid var(--brand);padding:11px 18px;border-radius:7px;font-weight:650;font-size:17px;min-height:46px}
.summary-next:hover{background:var(--brand-hover);border-color:var(--brand-red)}
.summary-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;min-height:260px;border:1px dashed #96b8c3;border-radius:12px;background:#f3f8fa;padding:25px}
.summary-empty h3{font-size:23px;margin:16px 0 8px;color:var(--brand)}
.summary-empty p{margin:0;font-size:17px;color:var(--muted)}
.week-placeholder .summary-workspace{max-width:1050px;margin:35px auto 20px;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.week-placeholder .summary-heading p,.week-placeholder .summary-caption p,.week-placeholder .summary-footer p{margin:0;max-width:none}
@media(min-width:751px){
 .presenting .summary-workspace .summary-content{flex:1;min-height:0;overflow-y:auto;scrollbar-width:thin}
 .presenting .summary-heading{padding:14px 24px}
 .presenting .summary-heading h2{font-size:25px}
 .presenting .summary-heading p:not(.eyebrow){display:none}
 .presenting .summary-content{padding:15px 24px}
 .presenting .summary-video-frame{max-width:min(100%,calc((100dvh - 465px)*16/9));min-width:356px}
 .presenting .summary-caption{margin-top:12px}
 .presenting .summary-caption h3{font-size:17px;margin:4px 0}
 .presenting .summary-caption p{font-size:13px}
 .presenting .summary-footer{padding:12px 24px}
}
@media(min-width:751px) and (max-width:1200px){
 .app-shell .material-tabs button{font-size:14px;gap:7px;padding:11px 9px}
 .material-tabs small{display:none}
 .material-tabs button b{font-size:12px;padding:5px}
}
@media(max-width:750px){
 .material-tabs{grid-template-columns:repeat(2,minmax(0,1fr))}
 .material-tabs button:last-child{grid-column:1/-1}
 .app-shell .material-tabs button{font-size:14px;gap:8px;padding:11px}
 .summary-heading{padding:18px 16px;gap:12px}
 .summary-heading h2{font-size:26px}
 .summary-heading p:not(.eyebrow){font-size:15px}
 .summary-week{font-size:13px;padding:5px 8px}
 .summary-content{padding:16px 12px}
 .summary-video-frame{border-radius:8px}
 .summary-caption{align-items:flex-start;flex-direction:column;gap:14px;margin-top:16px}
 .summary-caption h3{font-size:19px}
 .summary-footer{padding:15px 16px;flex-direction:column;align-items:stretch;gap:13px}
 .summary-next{text-align:center}
 .week-placeholder .summary-workspace{margin-top:25px}
}