/* Course pages only: facts, tools, curriculum, FAQ, floating section menu */
.course-faq__q:focus-visible{outline:2px solid var(--accent);outline-offset:3px;}
.course-hero__card{position:absolute;inset:30px 40px;border-radius:32px;background:linear-gradient(145deg,rgba(255,255,255,0.9),rgba(255,255,255,0.5));border:1px solid var(--glass-border);box-shadow:var(--shadow-lg);display:grid;place-items:center;overflow:hidden;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);}
[data-theme="dark"] .course-hero__card{background:linear-gradient(145deg,rgba(37,99,235,0.16),rgba(59,130,246,0.04));border-color:var(--course-line);}
.course-hero__card::before{content:"";position:absolute;inset:auto -20% -40% -20%;height:70%;background:radial-gradient(ellipse at center,rgba(37,99,235,0.22),transparent 65%);}
.course-hero__img{position:relative;width:min(260px,70%);height:auto;filter:drop-shadow(0 24px 40px rgba(37,99,235,0.28));animation:courseFloat 6s ease-in-out infinite;}
.facts{padding:0 0 24px;}
.facts__card{background:var(--card);border:1px solid var(--course-line);border-radius:var(--course-radius-lg);box-shadow:var(--shadow-md);padding:30px 32px;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);}
.facts__head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:22px;}
.facts__title{font-size:20px;font-weight:800;color:var(--text-1);}
.facts__sub{font-size:14px;color:var(--text-3);}
.facts__grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;}
.fact{display:flex;flex-direction:column;gap:4px;padding:16px;border-radius:var(--course-radius-sm);background:var(--course-soft-blue);border:1px solid transparent;transition:border-color 0.3s,transform 0.3s;}
.fact:hover{border-color:var(--course-line);transform:translateY(-3px);}
.fact__icon{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:var(--course-card-solid);color:var(--course-tile-text);font-size:19px;margin-bottom:8px;box-shadow:var(--shadow-sm);}
.fact__label{font-size:12.5px;color:var(--text-3);font-weight:500;}
.fact__value{font-size:16px;font-weight:800;color:var(--text-1);line-height:1.5;}
.fact__caption{font-size:12.5px;color:var(--text-2);}
.facts__foot{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:22px;padding-top:20px;border-top:1px dashed var(--course-line);}
.facts__foot p{font-size:15px;color:var(--text-2);display:flex;align-items:center;gap:10px;}
.facts__foot p .icon{color:var(--primary);font-size:20px;}
.compare__lead{max-width:760px;margin:-24px auto 40px;text-align:center;color:var(--text-2);font-size:15.5px;line-height:2;}
.compare__grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:980px;margin:0 auto;align-items:stretch;}
.compare-card{position:relative;padding:30px;border-radius:var(--course-radius-lg);background:var(--card);border:1px solid var(--course-line);box-shadow:var(--shadow-sm);}
.compare-card--ours{border:1.5px solid rgba(37,99,235,0.35);box-shadow:0 20px 50px rgba(37,99,235,0.14);}
[data-theme="dark"] .compare-card--ours{border-color:rgba(96,165,250,0.35);box-shadow:0 20px 50px rgba(37,99,235,0.18);}
.compare-card__badge{position:absolute;top:-13px;right:26px;padding:5px 14px;border-radius:100px;background:var(--gradient-1);color:#fff;font-size:12px;font-weight:700;box-shadow:0 6px 16px rgba(37,99,235,0.35);}
.compare-card__title{font-size:18px;font-weight:800;color:var(--text-1);margin-bottom:18px;}
.compare-card--other .compare-card__title{color:var(--text-2);}
.compare-card__list{display:grid;gap:12px;}
.compare-card__list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;line-height:1.9;color:var(--text-2);}
.compare-card__list .icon{margin-top:4px;font-size:18px;padding:3px;width:22px;height:22px;border-radius:50%;}
.compare-card--ours .compare-card__list .icon{background:var(--gradient-1);color:#fff;stroke-width:3;}
.compare-card--other .compare-card__list .icon{background:var(--course-soft-blue);color:var(--text-3);}
.compare-card--ours .compare-card__list li{color:var(--text-1);}
.tools-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.tool-group{display:flex;flex-direction:column;padding:24px;border-radius:var(--course-radius);background:var(--card);border:1px solid var(--course-line);box-shadow:var(--shadow-sm);transition:box-shadow 0.35s,border-color 0.35s;}
.tool-group:hover{box-shadow:var(--shadow-md);border-color:rgba(37,99,235,0.22);}
.tool-group--wide{grid-column:span 2;}
.tool-group__head{display:flex;align-items:center;gap:12px;margin-bottom:6px;}
.tool-group__icon{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:var(--course-tile);color:var(--course-tile-text);font-size:20px;flex-shrink:0;}
.tool-group__title{font-size:16.5px;font-weight:800;color:var(--text-1);}
.tool-group__desc{font-size:13.5px;color:var(--text-3);line-height:1.9;margin-bottom:16px;}
.tool-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:auto;}
.tool{display:inline-flex;align-items:center;gap:8px;padding:6px 14px 6px 6px;border-radius:100px;background:var(--bg-2);border:1px solid var(--course-line);font-size:13.5px;font-weight:700;color:var(--text-1);direction:ltr;transition:transform 0.25s,border-color 0.25s;}
[data-theme="dark"] .tool{background:rgba(255,255,255,0.04);}
.tool:hover{transform:translateY(-2px);border-color:rgba(37,99,235,0.35);}
.tool__mark{width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:var(--course-card-solid);border:1px solid var(--course-line);overflow:hidden;flex-shrink:0;color:var(--text-1);}
.tool__mark img{width:18px;height:18px;object-fit:contain;}
.tool__mark svg{width:18px;height:18px;}
[data-theme="dark"] .tool__mark--mono img{filter:invert(1);}
.tool-group--cta{justify-content:center;align-items:flex-start;background:var(--gradient-1);border:none;color:#fff;box-shadow:0 20px 44px rgba(37,99,235,0.3);}
.tool-group--cta .tool-group__title{color:#fff;font-size:18px;margin-bottom:8px;}
.tool-group--cta p{font-size:14px;line-height:1.9;color:rgba(255,255,255,0.86);margin-bottom:18px;}
.tool-group--cta .btn{background:#fff;color:#1d4ed8;box-shadow:0 10px 24px rgba(15,23,42,0.18);}
.tool-group--cta .btn:hover{transform:translateY(-3px);}
.terms{display:grid;gap:22px;max-width:1080px;margin:0 auto;}
.term{display:grid;grid-template-columns:260px 1fr;gap:28px;padding:28px;border-radius:var(--course-radius-lg);background:var(--card);border:1px solid var(--course-line);box-shadow:var(--shadow-sm);}
.term__head{display:flex;flex-direction:column;gap:10px;padding-left:24px;border-left:1px dashed var(--course-line);}
.term__badge{align-self:flex-start;padding:5px 14px;border-radius:100px;background:var(--gradient-1);color:#fff;font-size:12.5px;font-weight:700;box-shadow:0 6px 16px rgba(37,99,235,0.3);}
.term__icon{width:52px;height:52px;border-radius:16px;display:grid;place-items:center;background:var(--course-tile);color:var(--course-tile-text);font-size:24px;}
.term__title{font-size:19px;font-weight:800;color:var(--text-1);line-height:1.6;}
.term__desc{font-size:14px;line-height:1.9;color:var(--text-2);}
.lessons{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-content:start;}
.lesson{display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border-radius:var(--course-radius-sm);background:var(--bg-2);border:1px solid var(--course-line);transition:border-color 0.3s,transform 0.3s;}
[data-theme="dark"] .lesson{background:rgba(255,255,255,0.03);}
.lesson:hover{border-color:rgba(37,99,235,0.3);transform:translateY(-2px);}
.lesson__num{flex-shrink:0;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:var(--course-tile);color:var(--course-tile-text);font-size:13px;font-weight:800;}
.lesson__body{display:flex;flex-direction:column;gap:2px;min-width:0;}
.lesson__title{font-size:14.5px;font-weight:800;color:var(--text-1);line-height:1.8;}
.lesson__text{font-size:13px;line-height:1.85;color:var(--text-3);}
.instructor{display:grid;grid-template-columns:220px 1fr;gap:36px;align-items:center;max-width:920px;margin:0 auto;padding:32px;border-radius:var(--course-radius-lg);background:var(--card);border:1px solid var(--course-line);box-shadow:var(--shadow-md);position:relative;overflow:hidden;}
.instructor::before{content:"";position:absolute;width:280px;height:280px;left:-90px;top:-110px;border-radius:50%;background:radial-gradient(circle,rgba(37,99,235,0.16),transparent 70%);pointer-events:none;}
.instructor__photo{position:relative;aspect-ratio:4/5;border-radius:22px;background:linear-gradient(160deg,var(--course-tile),var(--course-soft-blue));display:grid;place-items:end center;overflow:hidden;border:1px solid var(--course-line);}
.instructor__placeholder{width:78%;height:auto;fill:var(--course-tile-text);opacity:0.35;}
.instructor__name{font-size:26px;font-weight:900;color:var(--text-1);line-height:1.4;}
.instructor__role{font-size:15px;color:var(--primary);font-weight:700;margin:4px 0 18px;}
[data-theme="dark"] .instructor__role{color:var(--accent);}
.instructor__list{display:grid;gap:10px;margin-bottom:20px;}
.instructor__list li{display:flex;gap:10px;align-items:center;font-size:14.5px;color:var(--text-2);}
.instructor__list .icon{font-size:18px;color:var(--primary);}
[data-theme="dark"] .instructor__list .icon{color:var(--accent);}
.instructor__badges{display:flex;flex-wrap:wrap;gap:10px;}
.instructor__badges span{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:100px;background:var(--bg-2);border:1px solid var(--course-line);font-size:13px;font-weight:600;color:var(--text-1);}
[data-theme="dark"] .instructor__badges span{background:rgba(255,255,255,0.04);}
.instructor__badges .icon{color:var(--primary);}
[data-theme="dark"] .instructor__badges .icon{color:var(--accent);}
.course-faq{max-width:820px;margin:0 auto;}
.course-faq__item{background:var(--card);border:1px solid var(--course-line);border-radius:20px;margin-bottom:14px;overflow:hidden;transition:border-color 0.3s,box-shadow 0.3s;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);}
.course-faq__item[open]{border-color:var(--primary);box-shadow:var(--shadow-md);}
[data-theme="dark"] .course-faq__item[open]{border-color:rgba(96,165,250,0.5);}
.course-faq__q{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:20px 24px;font-size:16px;font-weight:700;color:var(--text-1);}
.course-faq__q::-webkit-details-marker{display:none;}
.course-faq__icon{width:32px;height:32px;border-radius:10px;background:var(--bg-2);display:grid;place-items:center;flex-shrink:0;transition:transform 0.35s,background 0.35s,color 0.35s;}
[data-theme="dark"] .course-faq__icon{background:rgba(255,255,255,0.06);}
.course-faq__item[open] .course-faq__icon{background:var(--gradient-1);color:#fff;transform:rotate(180deg);}
.course-faq__a{padding:0 24px 22px;font-size:15px;line-height:2;color:var(--text-2);}
.course-faq__a a{color:var(--primary);font-weight:700;}
[data-theme="dark"] .course-faq__a a{color:var(--accent);}
@media (max-width:1080px){
  .facts__grid{grid-template-columns:repeat(3,1fr);}
  .tools-grid{grid-template-columns:repeat(2,1fr);}
  .tool-group--wide{grid-column:span 2;}
  .term{grid-template-columns:1fr;gap:20px;}
  .term__head{padding-left:0;border-left:0;padding-bottom:18px;border-bottom:1px dashed var(--course-line);display:grid;grid-template-columns:auto 1fr;column-gap:16px;row-gap:6px;align-items:center;}
  .term__icon{grid-row:span 2;}
  .term__badge{justify-self:start;}
  .term__desc{grid-column:1 / -1;}
}
@media (max-width:640px){
  .course-hero__card{inset:24px 20px;}
  .facts__card{padding:22px 16px;}
  .facts__grid{grid-template-columns:repeat(2,1fr);gap:10px;}
  .fact{padding:14px 12px;}
  .facts__foot{flex-direction:column;align-items:stretch;text-align:center;}
  .facts__foot p{justify-content:center;}
  .facts__foot .btn{justify-content:center;}
  .compare__lead{margin-top:-14px;}
  .compare__grid,.tools-grid{grid-template-columns:1fr;}
  .tool-group--wide{grid-column:auto;}
  .compare-card{padding:28px 20px 22px;}
  .term{padding:20px 16px;}
  .lessons{grid-template-columns:1fr;}
  .instructor{grid-template-columns:1fr;padding:22px;gap:22px;text-align:center;}
  .instructor__photo{width:170px;margin:0 auto;}
  .instructor__list li{justify-content:center;}
  .instructor__badges{justify-content:center;}
  .course-faq__q{padding:18px 18px;font-size:15px;}
  .course-faq__a{padding:0 18px 20px;font-size:14.5px;}
}
.lessons{list-style:none;}
.how__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.term__outcome{display:flex;gap:8px;align-items:flex-start;margin-top:6px;padding:12px 14px;border-radius:var(--course-radius-sm);background:var(--course-soft-blue);font-size:13.5px;line-height:1.9;color:var(--text-2);}
.term__outcome .icon{flex-shrink:0;margin-top:5px;font-size:16px;color:var(--course-tile-text);}
.term__outcome strong{color:var(--text-1);}
@media (max-width:1080px){
  .how__grid{grid-template-columns:repeat(2,1fr);}
  .term__outcome{grid-column:1 / -1;}
}
@media (max-width:640px){
  .how__grid{grid-template-columns:1fr;}
}
.prompt-demo{max-width:980px;margin:32px auto 0;padding:28px;border-radius:var(--course-radius-lg);background:var(--card);border:1px solid var(--course-line);box-shadow:var(--shadow-sm);}
.prompt-demo__title{font-size:18px;font-weight:800;color:var(--text-1);margin-bottom:4px;}
.prompt-demo__lead{font-size:14.5px;color:var(--text-2);margin-bottom:18px;}
.prompt-demo__grid{display:grid;grid-template-columns:0.8fr 1.2fr;gap:16px;}
.prompt-demo__box{padding:18px;border-radius:var(--course-radius-sm);border:1px dashed var(--course-line);background:var(--bg-2);}
[data-theme="dark"] .prompt-demo__box{background:rgba(255,255,255,0.03);}
.prompt-demo__box--good{border:1.5px solid rgba(37,99,235,0.35);background:var(--course-soft-blue);}
[data-theme="dark"] .prompt-demo__box--good{border-color:rgba(96,165,250,0.35);background:var(--course-soft-blue);}
.prompt-demo__label{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:800;margin-bottom:8px;color:var(--text-3);}
.prompt-demo__label .icon{font-size:15px;}
.prompt-demo__box--good .prompt-demo__label{color:var(--primary);}
[data-theme="dark"] .prompt-demo__box--good .prompt-demo__label{color:var(--accent);}
.prompt-demo__box p{font-size:15px;line-height:2;color:var(--text-1);}
.prompt-demo__box--weak p{color:var(--text-2);}
.prompt-demo__note{margin-top:16px;font-size:14.5px;line-height:1.9;color:var(--text-2);}
@media (max-width:640px){
  .prompt-demo{padding:20px 16px;}
  .prompt-demo__grid{grid-template-columns:1fr;}
}
.quick-nav{position:fixed;left:50%;bottom:16px;z-index:400;width:min(440px,calc(100% - 24px));transform:translate(-50%,calc(100% + 32px));opacity:0;visibility:hidden;transition:transform 0.45s cubic-bezier(0.22,1,0.36,1),opacity 0.3s ease,visibility 0.3s;}
.quick-nav.is-shown{transform:translate(-50%,0);opacity:1;visibility:visible;}
.quick-nav__bar{display:flex;align-items:center;gap:8px;padding:7px;border-radius:999px;background:rgba(255,255,255,0.82);border:1px solid rgba(255,255,255,0.7);box-shadow:0 18px 46px rgba(15,23,42,0.18);backdrop-filter:blur(22px) saturate(1.4);-webkit-backdrop-filter:blur(22px) saturate(1.4);}
[data-theme="dark"] .quick-nav__bar{background:rgba(11,22,39,0.82);border-color:rgba(255,255,255,0.1);box-shadow:0 18px 48px rgba(0,0,0,0.45);}
.quick-nav__toggle{flex:1;min-width:0;display:flex;align-items:center;gap:10px;padding:4px 6px 4px 12px;border-radius:999px;text-align:right;color:var(--text-1);transition:background 0.25s;}
.quick-nav__toggle:hover{background:var(--course-soft-blue);}
.quick-nav__toggle:focus-visible,.quick-nav__cta:focus-visible,.quick-nav__list a:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
.quick-nav__icon{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:var(--course-tile);color:var(--course-tile-text);font-size:18px;flex-shrink:0;}
.quick-nav__text{display:flex;flex-direction:column;min-width:0;line-height:1.5;}
.quick-nav__text small{font-size:11px;color:var(--text-3);font-weight:500;}
.quick-nav__current{font-size:14px;font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.quick-nav__chevron{margin-right:auto;font-size:18px;color:var(--text-3);transform:rotate(180deg);transition:transform 0.3s;}
.quick-nav.is-open .quick-nav__chevron{transform:none;}
.quick-nav__cta{flex-shrink:0;padding:11px 22px;border-radius:999px;background:var(--gradient-1);color:#fff;font-size:14px;font-weight:700;box-shadow:0 8px 20px rgba(37,99,235,0.35);transition:transform 0.25s,box-shadow 0.25s;}
.quick-nav__cta:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(37,99,235,0.45);}
.quick-nav__panel{margin-bottom:10px;padding:16px;border-radius:24px;background:rgba(255,255,255,0.94);border:1px solid rgba(15,23,42,0.08);box-shadow:0 24px 60px rgba(15,23,42,0.2);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);max-height:min(62vh,520px);overflow-y:auto;overscroll-behavior:contain;transform-origin:bottom center;animation:quickNavIn 0.28s cubic-bezier(0.22,1,0.36,1);}
.quick-nav__panel[hidden]{display:none;}
[data-theme="dark"] .quick-nav__panel{background:rgba(11,22,39,0.95);border-color:rgba(255,255,255,0.1);box-shadow:0 24px 60px rgba(0,0,0,0.5);}
.quick-nav__panel-title{font-size:12.5px;font-weight:700;color:var(--text-3);padding:0 8px 10px;}
.quick-nav__list{list-style:none;display:grid;gap:4px;}
.quick-nav__list a{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:14px;font-size:14px;font-weight:600;color:var(--text-2);transition:background 0.2s,color 0.2s;}
.quick-nav__list a:hover{background:var(--course-soft-blue);color:var(--text-1);}
.quick-nav__list a[aria-current="true"]{background:var(--course-tile);color:var(--course-tile-text);}
.quick-nav__num{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;background:var(--bg-2);border:1px solid var(--course-line);font-size:11.5px;font-weight:800;color:var(--text-3);flex-shrink:0;}
[data-theme="dark"] .quick-nav__num{background:rgba(255,255,255,0.05);}
.quick-nav__list a[aria-current="true"] .quick-nav__num{background:var(--gradient-1);border-color:transparent;color:#fff;}
@media (max-width:640px){
  .quick-nav{bottom:10px;}
  .quick-nav__cta{padding:10px 18px;}
  .quick-nav__icon{width:34px;height:34px;}
}
@media (prefers-reduced-motion:reduce){
  .quick-nav,.quick-nav__panel,.quick-nav__chevron{transition:none;animation:none;}
}
@media (min-width:641px){
  .quick-nav{width:min(540px,calc(100% - 24px));}
  .quick-nav__list{grid-template-columns:1fr 1fr;column-gap:6px;}
}
@media (prefers-reduced-motion:reduce){
  .course-hero__img{animation:none;}
  .lesson,.tool,.fact{transition:none;}
}
.fact__label{color:var(--text-2);}
.course-hero__card{inset:0;display:flex;align-items:center;justify-content:center;padding:0;border:0;border-radius:0;background:none;box-shadow:none;}
.course-hero__card::before{content:none;}
.course-hero__img{width:auto;height:100%;aspect-ratio:1;min-width:0;min-height:0;max-width:100%;max-height:100%;object-fit:contain;filter:none;animation:none;}
[data-theme="dark"] .course-hero__img{background:radial-gradient(circle closest-side,rgba(236,242,255,.92) 62%,rgba(236,242,255,0) 108%);}
@media(min-width:901px){.course-hero__visual{height:400px;}}
[data-theme="dark"] .course-hero__card{background:none;border:0;box-shadow:none;}
@media(max-width:640px){
  .course-hero__card{inset:0;padding:0;border-radius:0;}
}
#curriculum .section-head{margin-bottom:28px;}
#curriculum .terms{max-width:960px;gap:12px;}
#curriculum .term{display:block;padding:0;overflow:hidden;border-radius:20px;background:var(--course-card-solid);}
#curriculum .term__head{display:block;list-style:none;padding:18px 20px;border:0;cursor:pointer;}
#curriculum .term__head::-webkit-details-marker{display:none;}
#curriculum .term__head::marker{content:"";}
#curriculum .term__head:focus-visible{outline:2px solid #3b82f6;outline-offset:-3px;border-radius:18px;}
#curriculum .term__title{display:grid;grid-template-columns:42px minmax(0,1fr) 20px;align-items:center;gap:14px;font-size:17px;line-height:1.7;margin:0;}
#curriculum .term__icon{width:42px;height:42px;border-radius:13px;font-size:21px;}
#curriculum .term__heading-text{display:grid;gap:2px;min-width:0;}
#curriculum .term__badge{padding:0;background:none;color:var(--course-tile-text);box-shadow:none;font-size:11px;line-height:1.6;}
#curriculum .term__chevron{width:18px;height:18px;color:var(--text-3);transition:transform .2s ease;}
#curriculum .term__details[open] .term__chevron{transform:rotate(180deg);}
#curriculum .term__content{padding:0 20px 18px;}
#curriculum .term__desc{font-size:13px;margin-bottom:8px;}
#curriculum .term__outcome{margin:0 0 12px;padding:10px 12px;font-size:12.5px;border-radius:12px;}
#curriculum .lessons{grid-template-columns:repeat(2,minmax(0,1fr));column-gap:24px;row-gap:0;}
#curriculum .lesson{gap:10px;padding:12px 0;border:0;border-bottom:1px solid var(--course-line);border-radius:0;background:transparent;}
#curriculum .lesson:hover{transform:none;}
#curriculum .lesson__num{width:26px;height:26px;border-radius:8px;font-size:11px;}
#curriculum .lesson__title{font-size:13.5px;line-height:1.8;}
#curriculum .lesson__text{font-size:12.5px;line-height:1.85;}
@media(max-width:640px){
  #curriculum .term__head{padding:15px 16px;}
  #curriculum .term__title{grid-template-columns:36px minmax(0,1fr) 18px;gap:10px;font-size:15px;}
  #curriculum .term__icon{width:36px;height:36px;border-radius:11px;font-size:19px;}
  #curriculum .term__content{padding:0 16px 16px;}
  #curriculum .lessons{grid-template-columns:1fr;}
}
@media(max-width:640px) and (min-height:560px) and (prefers-reduced-motion:no-preference){
  #audience .audience__grid{display:block;isolation:isolate;padding-bottom:12px;}
  #audience .audience-card{position:sticky;top:calc(96px + var(--stack-index,0)*12px);z-index:calc(1 + var(--stack-index,0));margin-bottom:20px;background:var(--course-card-solid);box-shadow:0 -5px 24px -12px rgba(15,23,42,.2);opacity:1;transform:none;transition:border-color .25s,box-shadow .25s;}
  #audience .audience-card:nth-child(1){--stack-index:0;}
  #audience .audience-card:nth-child(2){--stack-index:1;}
  #audience .audience-card:nth-child(3){--stack-index:2;}
  #audience .audience-card:nth-child(4){--stack-index:3;}
  #audience .audience-card:nth-child(5){--stack-index:4;}
  #audience .audience-card:nth-child(6){--stack-index:5;}
}
@media(prefers-reduced-motion:reduce){
  #curriculum .term__chevron{transition:none;}
}
.formula{display:inline-block;direction:ltr;unicode-bidi:isolate;padding:1px 7px;border-radius:7px;background:var(--course-soft-blue);font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.92em;font-feature-settings:normal;}
@keyframes quickNavIn{from{opacity:0;transform:translateY(10px) scale(0.98);}to{opacity:1;transform:none;}}

/* Minimal term tabs, enabled only on curricula explicitly marked for tabs. */
#curriculum .terms.is-tabbed{display:block;overflow:hidden;border:1px solid var(--course-line);border-radius:22px;background:var(--course-card-solid);box-shadow:var(--shadow-sm);}
.curriculum-tabs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));padding:6px 16px 0;border-bottom:1px solid var(--course-line);}
.curriculum-tabs__tab{position:relative;min-width:0;min-height:48px;padding:12px 8px;border-radius:10px 10px 0 0;color:var(--text-3);font-size:13.5px;font-weight:600;line-height:1.7;transition:color .18s,background .18s;}
.curriculum-tabs__tab::after{content:"";position:absolute;inset-inline:25%;bottom:-1px;height:2px;border-radius:2px;background:var(--primary);opacity:0;transition:opacity .18s;}
.curriculum-tabs__tab[aria-selected="true"]{color:var(--course-tile-text);background:linear-gradient(0deg,var(--course-soft-blue),transparent);}
.curriculum-tabs__tab[aria-selected="true"]::after{opacity:1;}
.curriculum-tabs__tab:hover{color:var(--course-tile-text);}
.curriculum-tabs__tab:focus-visible{outline:2px solid var(--accent);outline-offset:-4px;}
#curriculum .is-tabbed .term{border:0;border-radius:0;background:transparent;box-shadow:none;opacity:1;transform:none;transition:none;}
#curriculum .is-tabbed .term[hidden]{display:none;}
#curriculum .is-tabbed .term__head{cursor:default;padding-top:20px;}
#curriculum .is-tabbed .term__title{grid-template-columns:36px minmax(0,1fr);font-size:16px;}
#curriculum .is-tabbed .term__icon{width:36px;height:36px;border-radius:11px;font-size:19px;}
#curriculum .is-tabbed .term__badge{display:none;}
#curriculum .is-tabbed .term:focus-visible{outline:2px solid var(--accent);outline-offset:-3px;}
@media(max-width:640px){.curriculum-tabs{padding-inline:8px;}.curriculum-tabs__tab{font-size:13px;}#curriculum .is-tabbed .term__title{font-size:15px;}}
@media(prefers-reduced-motion:reduce){.curriculum-tabs__tab,.curriculum-tabs__tab::after{transition:none;}}

/* Reference-style category cards, scoped to the AI course mobile enhancement. */
@media(max-width:640px){
  #tools-section .has-tool-picker{width:calc(100% - 32px);padding:16px;border-radius:28px;background:var(--course-tile);}
  #tools-section .has-tool-picker>.section-head{margin:0 0 16px;padding:22px 16px;border-radius:24px;background:var(--course-card-solid);}
  #tools-section .has-tool-picker .section-tag{background:none;border:0;padding:0;margin-bottom:8px;backdrop-filter:none;}
  #tools-section .has-tool-picker .section-title{font-size:23px;line-height:1.65;background:none;-webkit-text-fill-color:var(--text-1);color:var(--text-1);}
  #tools-section .has-tool-picker .title-mark::after{display:none;}
  #tools-section .has-tool-picker .section-sub{font-size:13px;line-height:1.95;}
  #tools-section .is-tool-picker{display:block;}
  .tool-picker{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;}
  .tool-picker__category{display:grid;grid-template-columns:32px minmax(0,1fr) 14px;column-gap:8px;align-content:center;min-width:0;min-height:76px;padding:12px;border:1px solid var(--course-line);border-radius:16px;background:var(--course-card-solid);text-align:start;box-shadow:none;transition:background .2s,border-color .2s;}
  .tool-picker__top{display:contents;}
  .tool-picker__category .tool-group__icon{grid-column:1;grid-row:1 / span 2;align-self:center;width:32px;height:32px;border-radius:10px;font-size:18px;}
  .tool-picker__chevron{grid-column:3;grid-row:1 / span 2;align-self:center;display:grid;place-items:center;color:var(--text-3);font-size:15px;transition:transform .2s;}
  .tool-picker__title{grid-column:2;grid-row:1;font-size:13.5px;line-height:1.7;font-weight:800;color:var(--text-1);}
  .tool-picker__count{grid-column:2;grid-row:2;font-size:11.5px;color:var(--text-3);}
  .tool-picker__category[aria-expanded="true"]{border-color:var(--primary);box-shadow:inset 0 0 0 1px var(--primary);background:var(--course-soft-blue);}
  .tool-picker__category[aria-expanded="true"] .tool-group__icon{background:var(--primary);color:#fff;}
  .tool-picker__category[aria-expanded="true"] .tool-picker__chevron{color:var(--course-tile-text);transform:rotate(180deg);}
  .tool-picker-panel{position:relative;margin-top:12px;border-radius:20px;background:var(--course-card-solid);}
  .tool-picker-panel[hidden],.tool-picker-panel .tool-group[hidden]{display:none;}
  .tool-picker-panel .tool-group{padding:16px 12px;border:0;border-radius:20px;background:transparent;box-shadow:none;opacity:1;transform:none;}
  .tool-picker-panel .tool-group__head{direction:ltr;padding-right:36px;margin-bottom:12px;gap:8px;}
  .tool-picker-panel .tool-group__head .tool-group__icon{width:26px;height:26px;background:none;border-radius:0;font-size:23px;}
  .tool-picker-panel .tool-group__title{font-size:17px;direction:rtl;}
  .tool-picker-panel .tool-group__desc{font-size:12px;margin-bottom:12px;}
  .tool-picker-panel .tool-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:0;}
  .tool-picker-panel .tool{min-width:0;min-height:44px;justify-content:center;direction:rtl;gap:6px;border-radius:12px;padding:8px 6px;background:var(--bg-2);font-size:12px;}
  .tool-picker-panel .tool__name{direction:ltr;overflow-wrap:anywhere;}
  .tool-picker-panel .tool__mark{width:20px;height:20px;background:none;border:0;}
  .tool-picker-panel__close{position:absolute;inset-inline-start:13px;top:15px;width:36px;height:36px;display:grid;place-items:center;border-radius:10px;color:var(--text-2);z-index:1;font-size:20px;}
  .tool-picker__category:focus-visible,.tool-picker-panel__close:focus-visible{outline:2px solid var(--accent);outline-offset:3px;}
  #tools-section .is-tool-picker>.tool-group--cta{margin-top:16px;}
}
@media(max-width:400px){.tool-picker-panel .tool{flex-direction:column;min-height:66px;gap:4px;}}
@media(max-width:360px){.tool-picker__category{grid-template-columns:26px minmax(0,1fr) 12px;padding:10px;column-gap:6px;}.tool-picker__category .tool-group__icon{width:26px;height:26px;font-size:16px;}.tool-picker__title{font-size:12px;}.tool-picker-panel .tool{font-size:11.5px;padding:7px 4px;}#tools-section .has-tool-picker .section-title{font-size:20px;}}
@media(prefers-reduced-motion:reduce){.tool-picker__category,.tool-picker__chevron{transition:none;}}

@media all{
  #how-it-works .how-scroll-track{position:relative;}
  #how-it-works .is-how-deck{position:sticky;top:var(--how-pin-top,120px);display:grid;grid-template-columns:minmax(0,1fr);gap:0;isolation:isolate;padding:8px 40px 45px 6px;touch-action:pan-y;}
  #how-it-works .is-how-deck .audience-card{grid-area:1 / 1;position:relative;min-width:0;min-height:310px;padding:24px;border-radius:26px;display:flex;flex-direction:column;justify-content:center;gap:0;background:var(--course-card-solid);border:1px solid var(--course-line);opacity:1;transform-origin:50% 85%;box-shadow:0 24px 42px -22px rgba(30,64,175,.24);transition:none;backface-visibility:hidden;}
  #how-it-works .is-how-deck .audience-card:not(.is-how-active){pointer-events:none;user-select:none;}
  #how-it-works .is-how-in-view .audience-card{will-change:transform,opacity;}
  .how-deck-meta{display:flex;align-items:center;gap:9px;margin-bottom:28px;font-size:12px;font-weight:700;color:var(--text-1);}
  #how-it-works .is-how-deck .audience-card__icon{width:32px;height:32px;border-radius:10px;font-size:18px;margin:0;background:var(--course-tile);color:var(--course-tile-text);}
  .how-deck-number{margin-right:auto;direction:ltr;font-size:38px;font-weight:800;line-height:1;color:var(--text-3);opacity:.35;}
  #how-it-works .is-how-deck .audience-card__title{font-size:23px;line-height:1.7;margin:0 0 12px;}
  #how-it-works .is-how-deck .audience-card__text{font-size:14px;line-height:2;margin:0;}
  .how-deck-nav{position:absolute;inset-inline-start:-2px;top:calc(50% - 80px);display:flex;flex-direction:column;padding:5px 0;border-radius:20px;background:var(--card);border:1px solid var(--course-line);}
  .how-deck-nav button{display:grid;place-items:center;width:32px;height:36px;border-radius:14px;}
  .how-deck-nav button::after{content:"";width:6px;height:6px;border-radius:8px;background:var(--text-3);opacity:.35;transition:height .25s,background .25s,opacity .25s;}
  .how-deck-nav button[aria-pressed="true"]::after{height:21px;background:var(--primary);opacity:1;}
  .how-deck-nav button:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
  .how-deck-status{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;}
}
@media(max-width:360px){#how-it-works .is-how-deck{padding-right:34px;}#how-it-works .is-how-deck .audience-card{padding:20px 18px;min-height:320px;}#how-it-works .is-how-deck .audience-card__title{font-size:20px;}.how-deck-meta{gap:6px;font-size:11px;}.how-deck-number{font-size:32px;}}
@media(prefers-reduced-motion:reduce){.how-deck-nav button::after{transition:none;}}
@media(prefers-reduced-motion:reduce){#how-it-works .is-how-deck{position:relative;top:auto;}#how-it-works .is-how-deck .audience-card:not(.is-how-active){visibility:hidden;}}

/* Full-width transparent AI scene, blended into the existing hero background. */
.course-hero__visual--ai{width:100%;height:auto;max-width:none;aspect-ratio:4/3;}
.course-hero__visual--ai .course-hero__card{inset:0;overflow:visible;background:none;border:0;box-shadow:none;backdrop-filter:none;-webkit-backdrop-filter:none;}
.course-hero__visual--ai .course-hero__img{width:100%;height:100%;max-width:none;max-height:none;aspect-ratio:4/3;object-fit:contain;background:none;filter:none;}
/* Wide (about 2:1) transparent hero art: keep its own ratio instead of the 4:3 box */
.course-hero__visual--wide,.course-hero__visual--wide .course-hero__img{aspect-ratio:1792/878;}
@media(min-width:1024px){.course-hero__visual--wide .course-hero__card{transform:scale(1.1);transform-origin:center;}}
/* Soft light pool behind a cut-out hero scene, so it sits on the page instead of floating */
.course-hero__visual--glow{position:relative;isolation:isolate;}
.course-hero__visual--glow::before{content:"";position:absolute;inset:10% 4% 6%;z-index:-1;border-radius:50%;background:radial-gradient(closest-side,rgba(96,165,250,.30),rgba(147,197,253,.14) 55%,transparent);filter:blur(22px);pointer-events:none;}
.course-hero__visual--glow::after{content:"";position:absolute;left:18%;right:18%;bottom:4%;height:7%;z-index:-1;border-radius:50%;background:radial-gradient(closest-side,rgba(30,64,175,.20),transparent);filter:blur(10px);pointer-events:none;}
[data-theme="dark"] .course-hero__visual--glow::before{background:radial-gradient(closest-side,rgba(59,130,246,.30),rgba(59,130,246,.10) 55%,transparent);}
[data-theme="dark"] .course-hero__visual--glow::after{opacity:.6;}

/* Screen-reader-only text */
.visually-hidden{position:absolute !important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* ==========================================================================
   Difference: one minimal comparison table (replaces the two cards)
   ========================================================================== */
#difference .compare__lead{max-width:660px;margin:-20px auto 32px;font-size:15px;}
.compare-table{max-width:900px;margin:0 auto;border:1px solid var(--course-line);border-radius:22px;background:var(--course-card-solid);box-shadow:var(--shadow-sm);overflow:hidden;}
.compare-table__row{display:grid;grid-template-columns:150px minmax(0,1fr) minmax(0,1.15fr);align-items:stretch;}
.compare-table__row + .compare-table__row{border-top:1px solid var(--course-line);}
.compare-table__label,.compare-table__cell,.compare-table__col{padding:16px 20px;font-size:14px;line-height:1.85;}
.compare-table__label{display:flex;align-items:center;font-weight:700;color:var(--text-1);font-size:13.5px;}
.compare-table__col{font-size:13.5px;font-weight:700;color:var(--text-3);display:flex;align-items:center;}
.compare-table__col--ours{color:var(--course-tile-text);}
.compare-table__cell{display:flex;gap:10px;align-items:flex-start;color:var(--text-3);}
.compare-table__cell .icon{flex-shrink:0;width:18px;height:18px;margin-top:4px;padding:3px;border-radius:50%;background:var(--course-soft-blue);color:var(--text-3);stroke-width:3;}
.compare-table__cell--ours,.compare-table__col--ours{background:var(--course-soft-blue);}
.compare-table__cell--ours{color:var(--text-1);font-weight:600;}
.compare-table__cell--ours .icon{background:var(--primary);color:#fff;}
.compare-table__row--head .compare-table__col{padding-block:14px;}
@media(max-width:640px){
  #difference .compare__lead{margin:-14px auto 24px;font-size:14.5px;}
  .compare-table{border-radius:20px;}
  .compare-table__row{grid-template-columns:minmax(0,1fr) minmax(0,1fr);}
  .compare-table__label{grid-column:1 / -1;padding:14px 16px 4px;font-size:12.5px;color:var(--text-3);font-weight:700;}
  .compare-table__row--head .compare-table__label{display:none;}
  .compare-table__cell,.compare-table__col{padding:6px 14px 14px;font-size:13px;gap:8px;}
  .compare-table__col{padding:12px 14px;font-size:12.5px;}
  .compare-table__cell--ours{border-radius:0;}
  .compare-table__cell .icon{width:16px;height:16px;margin-top:3px;}
}
#difference .prompt-demo{max-width:900px;}

/* ==========================================================================
   Instructor: compact, no empty space (shared by both course pages)
   ========================================================================== */
.instructor{display:block;max-width:760px;padding:24px 28px;gap:0;text-align:start;}
.instructor::before{content:none;}
.instructor__head{display:flex;align-items:center;gap:16px;padding-bottom:18px;margin-bottom:18px;border-bottom:1px solid var(--course-line);}
.instructor__photo{width:72px;height:72px;flex-shrink:0;aspect-ratio:auto;border-radius:50%;margin:0;place-items:end center;}
/* Frame the supplied portrait around the face inside the existing avatar. */
.instructor__photo img{position:absolute;width:172%;height:172%;max-width:none;left:-40%;top:-5.5%;object-fit:contain;}
.instructor__placeholder{width:84%;opacity:.4;}
.instructor__id{min-width:0;}
.instructor__name{font-size:20px;font-weight:900;line-height:1.5;}
.instructor__role{margin:2px 0 0;font-size:14px;}
.instructor__list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 24px;margin:0;}
.instructor__list li{justify-content:flex-start;align-items:flex-start;font-size:14px;line-height:1.8;}
.instructor__list .icon{flex-shrink:0;margin-top:4px;font-size:16px;}
@media(max-width:640px){
  .instructor{padding:18px;text-align:start;}
  .instructor__head{gap:14px;padding-bottom:14px;margin-bottom:14px;}
  .instructor__photo{width:60px;height:60px;margin:0;}
  .instructor__name{font-size:18px;}
  .instructor__role{font-size:13px;}
  .instructor__list{grid-template-columns:1fr;gap:8px;}
  .instructor__list li{justify-content:flex-start;font-size:13.5px;}
}

/* ==========================================================================
   Curriculum tabs: lighter, more refined
   ========================================================================== */
.curriculum-tabs__tab{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:0;line-height:1.5;}
.curriculum-tabs__count{font-size:11px;font-weight:500;color:var(--text-3);}
.curriculum-tabs__tab[aria-selected="true"] .curriculum-tabs__count{color:var(--course-tile-text);opacity:.8;}
#curriculum .is-tabbed .term__head{padding:22px 24px 0;}
#curriculum .is-tabbed .term__content{padding:0 24px 20px;}
#curriculum .is-tabbed .term__desc{margin:2px 0 14px;padding-inline-start:50px;font-size:13px;color:var(--text-3);}
#curriculum .is-tabbed .term__outcome{margin:0 0 6px;padding:10px 14px;background:transparent;border:1px dashed var(--course-line);border-radius:12px;font-size:12.5px;color:var(--text-2);}
#curriculum .is-tabbed .lesson__num{background:transparent;border:1px solid var(--course-line);color:var(--text-3);font-weight:700;}
#curriculum .is-tabbed .lesson:last-child,#curriculum .is-tabbed .lessons:not(:has(.lesson:nth-child(odd):last-child)) .lesson:nth-last-child(2){border-bottom:0;}
@media(max-width:640px){
  #curriculum .is-tabbed .term__head{padding:18px 16px 0;}
  #curriculum .is-tabbed .term__content{padding:0 16px 16px;}
  #curriculum .is-tabbed .term__desc{padding-inline-start:46px;margin-bottom:12px;}
  #curriculum .is-tabbed .lessons:not(:has(.lesson:nth-child(odd):last-child)) .lesson:nth-last-child(2){border-bottom:1px solid var(--course-line);}
}

/* Difference: cards on desktop (original design), compact comparison table on mobile */
.compare--mobile{display:none;}
@media(max-width:640px){
  .compare--desktop{display:none;}
  .compare-table.compare--mobile{display:block;padding:6px;border-radius:22px;}
  .compare-table__row{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:8px;padding:12px 8px;}
  .compare-table__row + .compare-table__row{border-top:1px solid var(--course-line);}
  .compare-table__row--head{padding:8px 8px 10px;}
  .compare-table__row--head .compare-table__label{display:none;}
  .compare-table__label{grid-column:1 / -1;padding:0 4px;font-size:12px;font-weight:700;color:var(--text-3);}
  .compare-table__col{justify-content:center;text-align:center;padding:9px 8px;border-radius:12px;font-size:12.5px;line-height:1.6;background:var(--bg-2);color:var(--text-2);}
  [data-theme="dark"] .compare-table__col{background:rgba(255,255,255,0.05);}
  .compare-table__col--ours,[data-theme="dark"] .compare-table__col--ours{background:var(--gradient-1);color:#fff;}
  .compare-table__cell{gap:8px;padding:10px;border-radius:12px;font-size:13px;line-height:1.85;background:transparent;}
  .compare-table__cell--ours{background:var(--course-soft-blue);color:var(--text-1);font-weight:600;}
  .compare-table__cell .icon{width:16px;height:16px;margin-top:3px;padding:2.5px;}
}

/* Curriculum tabs: segmented control (soft track, raised active pill) */
.curriculum-tabs{gap:4px;margin:16px 16px 0;padding:4px;border:0;border-radius:14px;background:var(--course-soft-blue);}
[data-theme="dark"] .curriculum-tabs{background:rgba(255,255,255,0.05);}
.curriculum-tabs__tab{min-height:54px;padding:8px 6px;border-radius:11px;background:transparent;color:var(--text-2);font-size:14px;font-weight:700;transition:background .2s,color .2s,box-shadow .2s;}
.curriculum-tabs__tab::after{content:none;}
.curriculum-tabs__tab:hover{color:var(--text-1);}
.curriculum-tabs__tab[aria-selected="true"]{background:var(--course-card-solid);color:var(--text-1);box-shadow:0 1px 2px rgba(15,23,42,.06),0 6px 16px rgba(15,23,42,.08);}
[data-theme="dark"] .curriculum-tabs__tab[aria-selected="true"]{background:rgba(255,255,255,0.1);color:#fff;box-shadow:inset 0 0 0 1px rgba(255,255,255,0.08);}
.curriculum-tabs__count{margin-top:1px;font-size:11.5px;font-weight:500;color:var(--text-2);}
.curriculum-tabs__tab[aria-selected="true"] .curriculum-tabs__count{color:var(--primary);opacity:1;}
[data-theme="dark"] .curriculum-tabs__tab[aria-selected="true"] .curriculum-tabs__count{color:var(--accent);}
.curriculum-tabs__tab:focus-visible{outline:2px solid var(--accent);outline-offset:1px;}
@media(max-width:640px){.curriculum-tabs{margin:12px 12px 0;padding:4px;}.curriculum-tabs__tab{min-height:50px;font-size:13.5px;}}