.qt-v21-header .qt-v3-nav{gap:clamp(.65rem,1.3vw,1.4rem)}
.qt-v21-header .qt-v3-nav>a,.qt-v21-header .qt-nav-programs-trigger{font-size:clamp(.78rem,.88vw,.98rem);white-space:nowrap}
.qt-v21-program-menu{grid-template-columns:repeat(5,minmax(145px,1fr));width:min(1100px,94vw);left:50%;transform:translateX(-50%)}
.qt-lecture-menu,.qt-guide-menu{grid-template-columns:repeat(2,minmax(240px,1fr));width:min(720px,calc(100vw - 32px));left:50%;transform:translateX(-50%)}
.qt-resource-menu{grid-template-columns:repeat(3,minmax(210px,1fr));width:min(900px,calc(100vw - 32px));right:0;left:auto;transform:none}
.qt-v21-header .qt-nav-programs:hover .qt-resource-menu,.qt-v21-header .qt-nav-programs:focus-within .qt-resource-menu{transform:none}
.qt-v21-header .qt-nav-programs:hover .qt-lecture-menu,.qt-v21-header .qt-nav-programs:focus-within .qt-lecture-menu,.qt-v21-header .qt-nav-programs:hover .qt-guide-menu,.qt-v21-header .qt-nav-programs:focus-within .qt-guide-menu{transform:translateX(-50%)}
.qt-v21-header .qt-mega-menu{top:calc(100% + 10px);border-top:4px solid #f5a623}
.qt-v21-header .qt-mega-menu:before{top:-16px;height:18px}
.qt-v21-header .qt-mega-menu strong{color:#d87800;font-size:.76rem}
.qt-v21-header .qt-mega-menu a.qt-tutor-link{color:#b36c00!important;font-size:.72rem!important;font-weight:800;border-top:1px solid #e8edf2;padding-top:.45rem}
.qt-menu-intro{margin:.35rem 0 .65rem;color:#66758a;font-size:.76rem;line-height:1.42}
.qt-v21-header .qt-nav-programs-trigger:hover,.qt-v21-header .qt-nav-programs:focus-within>.qt-nav-programs-trigger{color:#ffb32c!important}
.qt-v21-header,.qt-v21-header .qt-v3-nav{max-width:100%;min-width:0}
.qt-home-hero,.qt-overview-hero,.qt-info-hero{padding:clamp(3.5rem,6vw,6.5rem)!important;overflow:hidden}
.qt-home-hero h1,.qt-overview-hero h1,.qt-info-hero h1{max-width:18ch;font-size:clamp(3rem,5.8vw,6.4rem);line-height:1.02;overflow-wrap:anywhere}
.qt-home-hero h1 em,.qt-overview-hero h1 em,.qt-info-hero h1 em{display:block;margin-top:.1em;line-height:1.02}
.qt-program-hero h1{line-height:1!important;letter-spacing:-.045em!important}
.qt-program-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(1.4rem,2vw,2.2rem);align-items:stretch}
.qt-program-grid .qt-exam-card{display:flex;flex-direction:column;min-width:0;height:auto;padding:clamp(2rem,2.6vw,3rem)}
.qt-program-grid .qt-exam-card>span{font-size:clamp(.7rem,.78vw,.88rem);overflow-wrap:anywhere}
.qt-program-grid .qt-exam-card h3{font-size:clamp(1.65rem,2.2vw,2.65rem);line-height:1.02;overflow-wrap:anywhere}
.qt-program-grid .qt-exam-card p{font-size:clamp(1rem,1.22vw,1.28rem);line-height:1.55;overflow-wrap:anywhere}
.qt-program-grid .qt-exam-card a{margin-top:auto;font-size:clamp(1rem,1.18vw,1.28rem);line-height:1.3;overflow-wrap:anywhere}
.qt-overview .qt-v21-program-grid{grid-template-columns:repeat(6,minmax(0,1fr));gap:clamp(1.35rem,2vw,2rem);align-items:stretch;padding-block:clamp(3.5rem,7vw,6rem)}
.qt-overview .qt-v21-program-grid>a{display:flex;flex-direction:column;grid-column:span 2;min-width:0;min-height:clamp(300px,29vw,390px);padding:clamp(1.8rem,3vw,2.75rem)!important;border-radius:24px}
.qt-overview .qt-v21-program-grid>a:nth-last-child(-n+2){grid-column:span 3}
.qt-overview .qt-v21-program-grid span{display:block;margin:0 0 1.15rem;font-size:clamp(.7rem,.78vw,.82rem);line-height:1.35}
.qt-overview .qt-v21-program-grid h2{margin:0 0 1rem;font-size:clamp(1.85rem,2.45vw,2.8rem);line-height:1.04;overflow-wrap:anywhere}
.qt-overview .qt-v21-program-grid p{margin:0;font-size:clamp(1rem,1.12vw,1.18rem);line-height:1.58}
.qt-ai-explainer{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.35fr);gap:clamp(2rem,5vw,5rem);align-items:start}
.qt-ai-explainer>ol{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;list-style:none;margin:0;padding:0}
.qt-ai-explainer li{padding:1.2rem;border:1px solid rgba(20,43,75,.15);border-radius:18px;background:#fff}
.qt-ai-explainer li strong{color:#e98a15;letter-spacing:.12em}
.qt-ai-explainer li h3{font-size:clamp(1.3rem,1.7vw,1.8rem);margin:.45rem 0}
.qt-ai-explainer .qt-fineprint,.qt-ai-explainer>.qt-btn{grid-column:1/-1}
.qt-v21-materials [id]{scroll-margin-top:120px}
.qt-v21-footer nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.6rem 1.4rem}
@media (max-width:1180px){.qt-program-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.qt-overview .qt-v21-program-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.qt-overview .qt-v21-program-grid>a,.qt-overview .qt-v21-program-grid>a:nth-last-child(-n+2){grid-column:span 1}.qt-v21-program-menu{grid-template-columns:repeat(3,minmax(160px,1fr));max-height:72vh;overflow:auto}}
@media (max-width:1100px){.qt-v3-nav .qt-nav-programs .qt-mega-menu{position:static;width:100%;transform:none;display:none;grid-template-columns:1fr;margin-top:.5rem}.qt-v3-nav .qt-nav-programs.is-open .qt-mega-menu{display:grid}.qt-v21-header .qt-v3-nav>a,.qt-v21-header .qt-nav-programs-trigger{font-size:1rem}.qt-ai-explainer{grid-template-columns:1fr}}
@media (max-width:700px){.qt-program-grid,.qt-overview .qt-v21-program-grid{grid-template-columns:1fr}.qt-overview .qt-v21-program-grid>a{min-height:auto}.qt-ai-explainer>ol{grid-template-columns:1fr}.qt-home-hero h1,.qt-overview-hero h1,.qt-info-hero h1{font-size:clamp(2.7rem,15vw,4.5rem)}}

/* Homepage program cards: preserve comfortable interior spacing and balance 3 + 2 cards. */
.qt-home .qt-program-grid{grid-template-columns:repeat(6,minmax(0,1fr))!important;gap:clamp(1.25rem,2vw,2rem)!important}
.qt-home .qt-program-grid>.qt-exam-card{grid-column:span 2;padding:clamp(2rem,2.8vw,2.75rem)!important;min-height:clamp(310px,28vw,390px)!important}
.qt-home .qt-program-grid>.qt-exam-card:nth-last-child(-n+2){grid-column:span 3}
.qt-home .qt-program-grid>.qt-exam-card>span{margin-bottom:1rem}
.qt-home .qt-program-grid>.qt-exam-card h3{margin:0 0 1rem}
.qt-home .qt-program-grid>.qt-exam-card p{margin:0}
.qt-home .qt-program-grid>.qt-exam-card a{padding-top:1.5rem}
@media (max-width:1050px){.qt-home .qt-program-grid{grid-template-columns:repeat(2,minmax(0,1fr))!important}.qt-home .qt-program-grid>.qt-exam-card,.qt-home .qt-program-grid>.qt-exam-card:nth-last-child(-n+2){grid-column:span 1}}
@media (max-width:650px){.qt-home .qt-program-grid{grid-template-columns:1fr!important}.qt-home .qt-program-grid>.qt-exam-card{min-height:auto!important}}
/* 2.2.29 lecture manuscripts and presentation-deck library */
.qt-material-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
.qt-lecture-materials{max-width:1180px;margin:72px auto;padding:0 28px;scroll-margin-top:120px}
.qt-lecture-materials .qt-section-heading{max-width:780px;margin-bottom:28px}
.qt-lecture-materials .qt-section-heading h2{margin:6px 0 12px;font-size:clamp(2.2rem,4vw,4.4rem);line-height:.98;color:#122b4d}
.qt-lecture-materials .qt-section-heading>p:last-child{font-size:1.05rem;line-height:1.65;color:#5c6d84}
.qt-resource-course-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.qt-resource-course-grid article{display:flex;flex-direction:column;min-height:270px;padding:30px;border:1px solid #d7e0ea;border-top:5px solid #f5a623;border-radius:24px;background:#fff;box-shadow:0 16px 36px rgba(13,38,68,.08)}
.qt-resource-course-grid article>span{font-size:.78rem;font-weight:800;letter-spacing:.13em;text-transform:uppercase;color:#cc7100}
.qt-resource-course-grid h3{margin:10px 0 9px;font-size:1.65rem;line-height:1.12;color:#202d70}
.qt-resource-course-grid p{margin:0 0 20px;color:#5b6b81;line-height:1.55}
.qt-resource-course-grid a{display:block;margin-top:auto;padding:11px 0 8px;border-top:1px solid #d6e0ea;font-weight:800;color:#122b4d;text-decoration:none}
.qt-resource-course-grid a+a{margin-top:0}
.qt-resource-course-grid a:hover,.qt-resource-course-grid a:focus{color:#c96d00}
.qt-resource-note{margin:24px 0 0;padding:22px 24px;border-radius:18px;background:#edf4f8;color:#4e6077;line-height:1.6}
@media(max-width:760px){.qt-lecture-materials{padding:0 18px}.qt-resource-course-grid{grid-template-columns:1fr}.qt-resource-course-grid article{min-height:0;padding:24px}.qt-material-actions .qt-btn{width:100%;text-align:center}}

/* 2.2.31 expanded founder story, related initiatives, and about-page conversion path */
.qt-about-grid>div>p{color:#536277;line-height:1.72}.qt-about-grid>div>p+p{margin-top:1rem}
.qt-about-inline-link{display:block;margin-top:24px;color:#fff!important;font-weight:800;text-decoration:none;border-top:1px solid rgba(255,255,255,.2);padding-top:18px}
.qt-about-inline-link:hover,.qt-about-inline-link:focus{color:#f5b53e!important}
.qt-related-work{max-width:1080px;margin:0 auto;padding:10px 24px 95px}.qt-related-work .qt-section-heading{max-width:800px;margin-bottom:30px}.qt-related-work .qt-section-heading h2{margin:6px 0 14px;font-size:clamp(2.4rem,4.4vw,4.6rem);line-height:.98;color:#202d70}.qt-related-work .qt-section-heading>p:last-child{color:#5c6b7d;font-size:1.08rem;line-height:1.65}
.qt-related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.qt-related-grid article{display:flex;flex-direction:column;min-height:330px;padding:34px;border:1px solid #d7e0ea;border-top:5px solid #f5a623;border-radius:24px;background:#fff;box-shadow:0 16px 36px rgba(13,38,68,.08)}.qt-related-grid article>span{font-size:.76rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:#c96d00}.qt-related-grid h3{margin:12px 0;font-size:clamp(1.7rem,2.5vw,2.4rem);line-height:1.08;color:#202d70}.qt-related-grid p{margin:0 0 24px;color:#5b6b81;line-height:1.65}.qt-related-grid a{margin-top:auto;padding-top:16px;border-top:1px solid #d6e0ea;color:#122b4d;text-decoration:none;font-weight:800}.qt-related-grid a:hover,.qt-related-grid a:focus{color:#c96d00}
.qt-about-cta{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(280px,.7fr);gap:40px;align-items:center;padding:64px max(24px,calc((100vw - 1080px)/2));background:linear-gradient(135deg,#0b203a,#173a64);color:#fff}.qt-about-cta h2{margin:6px 0 12px;font-size:clamp(2.2rem,4vw,4rem);line-height:1;color:#fff!important}.qt-about-cta p{max-width:720px;color:#ced9e5;line-height:1.65}.qt-about-cta nav{display:flex;flex-direction:column;gap:12px}.qt-about-cta .qt-btn{text-align:center}
@media(max-width:800px){.qt-related-grid,.qt-about-cta{grid-template-columns:1fr}.qt-related-grid article{min-height:0}.qt-about-cta nav{flex-direction:row;flex-wrap:wrap}}
@media(max-width:540px){.qt-related-work{padding-inline:18px}.qt-related-grid article{padding:25px}.qt-about-cta nav{flex-direction:column}.qt-about-cta .qt-btn{width:100%}}