/* ============================= HEADER ============================= */
.site-header{
  position:sticky;top:0;z-index:40;
  background:var(--paper-raised);
  border-bottom:1px solid var(--line);
}
.site-header .wrap{
  display:flex;align-items:center;justify-content:space-between;
  height:72px;
}
.brand{display:flex;align-items:center;gap:10px}
.brand img{height:34px;width:auto}
.brand-word{font-family:var(--font-display);font-weight:700;font-size:19px;letter-spacing:-.01em}

.nav-links{display:flex;align-items:center;gap:22px;flex-wrap:nowrap}
.nav-links a{font-weight:500;font-size:15px;color:var(--ink-soft);white-space:nowrap}
.nav-links a:hover{color:var(--ink)}
.account-nav{display:flex;align-items:center;gap:14px;flex-wrap:nowrap}
.account-nav a{font-weight:500;font-size:15px;color:var(--ink-soft);white-space:nowrap}
.account-nav a:hover{color:var(--ink)}
.account-nav .account-email{font-weight:600;font-size:13.5px;color:var(--ink);max-width:140px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
@media (max-width:1180px){.account-nav{flex-direction:column;align-items:flex-start;gap:0}.account-nav a{padding:14px 0;width:100%;border-bottom:1px solid var(--line);font-size:16px}.account-nav .account-email{padding:14px 0;width:100%;max-width:none;border-bottom:1px solid var(--line)}}
.nav-cta{margin-left:8px}
.nav-toggle{display:none;background:none;border:none;padding:8px}
.nav-toggle svg{width:24px;height:24px}

@media (max-width:1180px){
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
}

/* Body-level mobile menu overlay — nav-links physically moves in here when
   opened (see js/mobile-menu.js), completely outside .site-header, so it
   can't inherit the header's blur/transparency the way a nested fixed
   element could. */
.mobile-menu-backdrop{
  position:fixed;inset:0;z-index:9999;
  background-color:#F7F8FA;
  opacity:0;pointer-events:none;transition:opacity .18s ease;
  overflow-y:auto;
  padding:88px 20px 24px;
}
.mobile-menu-backdrop.open{opacity:1;pointer-events:auto}
.nav-links.in-mobile-menu{
  display:flex !important;
  flex-direction:column;align-items:flex-start;gap:0;
}
.nav-links.in-mobile-menu a{padding:14px 0;width:100%;border-bottom:1px solid var(--line);font-size:16px;color:var(--ink-soft)}
.nav-links.in-mobile-menu .account-nav{display:flex;flex-direction:column;width:100%}

/* Avatar-style account button, replacing plain Sign In / email text */
.account-avatar-wrap{position:relative;display:flex;align-items:center}
.account-avatar-btn{width:34px;height:34px;border-radius:50%;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;padding:0}
.account-avatar-btn.is-guest{background:var(--paper-raised,#F3F5FA);color:var(--ink-soft);border:1.5px solid var(--line)}
.account-avatar-btn.is-guest svg{width:18px;height:18px}
.account-avatar-btn.is-signed-in{background:var(--navy,#152447);color:#fff;font-size:13px;font-weight:700;letter-spacing:.02em}
.account-avatar-dropdown{position:absolute;top:calc(100% + 8px);right:0;background:var(--paper,#fff);border:1px solid var(--line);border-radius:10px;box-shadow:0 8px 24px rgba(21,36,71,.14);min-width:160px;padding:6px;display:none;z-index:20}
.account-avatar-dropdown.open{display:block}
.account-avatar-dropdown a{display:block;padding:9px 12px;border-radius:7px;font-size:14px;font-weight:500;color:var(--ink);white-space:nowrap;text-decoration:none}
.account-avatar-dropdown a:hover{background:var(--paper-raised,#F3F5FA)}
@media (max-width:1180px){
  .account-avatar-wrap{flex-direction:column;align-items:flex-start;width:100%}
  .account-avatar-btn.is-signed-in{margin-bottom:10px}
  .account-avatar-dropdown{position:static;box-shadow:none;border:none;margin-top:0;display:block;padding:0;width:100%}
  .account-avatar-dropdown a{padding:12px 0;border-bottom:1px solid var(--line);border-radius:0}
}
.nav-links.in-mobile-menu .nav-cta{margin-left:0;margin-top:12px;width:100%}
.nav-links.in-mobile-menu .nav-cta .btn{width:100%}

/* ============================= HERO ============================= */
.hero-covers-hint{
  display:flex;align-items:center;gap:6px;justify-content:center;
  font-size:12.5px;font-weight:600;color:var(--amber-deep);margin-top:14px;
}


.hero{
  position:relative;
  padding:56px 0 72px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  text-align:center;
}
.hero .wrap{position:relative;display:flex;flex-direction:column;align-items:center}
.hero-greeting{
  align-self:flex-start;
  font-size:17px;font-weight:800;color:var(--ink);
  margin:0 0 20px;text-align:left;
}
.trust-bar{
  font-size:13px;font-weight:600;color:var(--blue-deep);
  background:var(--blue-tint);
  padding:7px 16px;border-radius:999px;margin-bottom:24px;
}
.hero-inner{max-width:720px}
.hero h1{
  font-size:clamp(30px,5vw,50px);
  line-height:1.1;
  margin:0 0 16px;
  font-weight:800;
}
.hero h1 em{
  font-style:normal;color:var(--blue);
}
.hero-sub{
  font-size:18px;color:var(--ink-soft);
  max-width:560px;margin:0 auto 30px;
}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-bottom:22px}

.hero-badges{display:flex;gap:22px;flex-wrap:wrap;justify-content:center}
.hero-badges span{font-size:13.5px;font-weight:600;color:var(--ink-soft)}

.hero-covers{display:flex;justify-content:center;gap:18px;margin-top:48px}
.hero-cover-card{
  width:96px;height:134px;border-radius:8px;
  box-shadow:var(--shadow-lg);
}
.hc-1{background:linear-gradient(160deg,#3B6BEB,#1B3B99);transform:rotate(-6deg) translateY(6px)}
.hc-2{background:linear-gradient(160deg,#E8871E,#C46A0C);transform:translateY(-6px);z-index:1}
.hc-3{background:linear-gradient(160deg,#1B8A5A,#0F5C3B);transform:rotate(6deg) translateY(6px)}

.hero-cover-card{
  cursor:pointer;
  position:relative;overflow:hidden;
  transition:box-shadow .25s ease, filter .25s ease;
}
.hero-cover-card:hover{box-shadow:0 12px 28px rgba(0,0,0,.22);filter:brightness(1.05)}
.hero-cover-card::after{
  content:"";position:absolute;top:0;left:-60%;width:45%;height:100%;
  background:linear-gradient(120deg,transparent,rgba(255,255,255,.55),transparent);
  transform:skewX(-20deg);transition:left .6s ease;
  pointer-events:none;
}
.hero-cover-card:hover::after{left:130%}


.bb-backdrop{
  position:fixed;inset:0;background:rgba(10,16,28,.55);display:flex;
  align-items:center;justify-content:center;z-index:200;padding:20px;
  opacity:0;pointer-events:none;transition:opacity .2s ease;
}
.bb-backdrop.open{opacity:1;pointer-events:auto}
.bb-card{
  background:var(--paper-raised);border-radius:var(--radius-lg);max-width:420px;width:100%;
  overflow:hidden;position:relative;transform:translateY(10px);transition:transform .2s ease;
  box-shadow:var(--shadow-lg);
}
.bb-backdrop.open .bb-card{transform:translateY(0)}
.bb-close{
  position:absolute;top:12px;right:12px;z-index:2;width:30px;height:30px;border-radius:50%;
  background:rgba(0,0,0,.4);color:#fff;border:none;font-size:14px;cursor:pointer;
}
.bb-image{width:100%;aspect-ratio:16/9;background:linear-gradient(135deg,var(--blue),var(--blue-deep));overflow:hidden}
.bb-image img{width:100%;height:100%;object-fit:cover;display:block}
.bb-body{padding:20px}
.bb-title{font-family:var(--font-display);font-size:19px;font-weight:700;margin-bottom:8px}
.bb-text{font-size:14px;color:var(--ink-soft);margin-bottom:16px}
.bb-cta{width:100%;text-align:center}
.bb-nav{display:flex;align-items:center;justify-content:space-between;padding:0 20px 18px}
.bb-arrow{
  width:32px;height:32px;border-radius:50%;border:1px solid var(--line-strong);
  background:var(--paper);font-size:16px;cursor:pointer;color:var(--ink);
}
.bb-arrow:hover{border-color:var(--amber);color:var(--amber-deep)}
.bb-dots{display:flex;gap:6px}
.bb-dot{width:7px;height:7px;border-radius:50%;background:var(--line-strong)}
.bb-dot.active{background:var(--amber)}

@media (max-width:640px){
  .hero{padding:40px 0 48px}
  .hero-ctas{flex-direction:column;width:100%}
  .hero-ctas .btn{width:100%}
  
}

/* ===================== CURRENCY / CONTROLS BAR ===================== */
.controls-bar{
  border-bottom:1px solid var(--line);
  background:var(--paper-raised);
}
.controls-bar .wrap{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 20px;gap:16px;flex-wrap:wrap;
}
.controls-label{font-size:13px;color:var(--ink-soft)}
.currency-select-wrap{position:relative;display:inline-flex;align-items:center}
.currency-select{
  appearance:none;
  font-family:var(--font-mono);
  font-weight:600;font-size:13px;
  padding:9px 34px 9px 14px;
  border-radius:var(--radius-sm);
  border:1.5px solid var(--line-strong);
  background:var(--paper-raised);
  color:var(--ink);
  max-width:220px;
  text-overflow:ellipsis;
}
.currency-select-wrap::after{
  content:"▾";position:absolute;right:14px;pointer-events:none;color:var(--ink-soft);font-size:11px;
}
.quiz-promo-banner{display:block;text-decoration:none;background:linear-gradient(90deg,var(--blue),#4A7BFF);
  color:#fff;transition:filter .15s}
.quiz-promo-banner:hover{filter:brightness(1.06)}
.quiz-promo-inner{display:flex;align-items:center;gap:14px;padding:14px 20px;flex-wrap:wrap}
.quiz-promo-badge{background:rgba(255,255,255,.22);font-weight:800;font-size:11.5px;letter-spacing:.03em;
  text-transform:uppercase;padding:5px 12px;border-radius:999px;flex-shrink:0}
.quiz-promo-text{font-size:14.5px;flex:1;min-width:200px}
.quiz-promo-text strong{font-weight:800}
.quiz-promo-arrow{flex-shrink:0;display:flex}

/* ============================= SECTIONS ============================= */
.section{padding:80px 0}
.section-head{max-width:640px;margin-bottom:44px}
.section-head h2{font-size:clamp(26px,4vw,36px);margin:14px 0 12px}
.section-head p{color:var(--ink-soft);font-size:16px}

/* ============================= BOOK GRID ============================= */
.book-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:28px;
}
.book-card{
  background:var(--paper-raised);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:20px;
  display:flex;flex-direction:column;gap:14px;
  transition:box-shadow .2s ease, transform .2s ease;
}
.book-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}

.book-cover-wrap{
  position:relative;
  border-radius:var(--radius-sm);
  overflow:visible;
  padding:18px 8px 8px;
  display:flex;justify-content:center;
}
.book-cover{
  width:120px;aspect-ratio:3/4.2;
  border-radius:3px 6px 6px 3px;
  background:linear-gradient(135deg,var(--blue),var(--blue-deep));
  box-shadow:
    -3px 0 0 rgba(0,0,0,.12) inset,
    0 14px 30px -8px rgba(27,59,153,.45);
  display:flex;flex-direction:column;justify-content:space-between;
  padding:14px 12px;color:#fff;
  position:relative;
  transform:perspective(600px) rotateY(-8deg);
}
.book-cover::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:8px;
  background:rgba(255,255,255,.14);
  border-radius:3px 0 0 3px;
}
.book-cover .bc-mark{font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;opacity:.85}
.book-cover .bc-title{font-family:var(--font-display);font-weight:700;font-size:13px;line-height:1.25}

.book-card-body{display:flex;flex-direction:column;gap:8px;flex:1}
.book-card-tags{display:flex;gap:8px;flex-wrap:wrap}
.format-pill{
  font-size:11px;font-weight:600;color:var(--ink-soft);
  background:var(--paper);border:1px solid var(--line);
  padding:4px 8px;border-radius:4px;
}
.book-title{font-family:var(--font-display);font-size:17px;font-weight:700;line-height:1.3}
.book-desc{font-size:14px;color:var(--ink-soft);flex:1}
.book-meta{display:flex;align-items:center;justify-content:space-between}
.book-price{font-family:var(--font-mono);font-weight:700;font-size:19px}
.book-price small{font-weight:500;font-size:12px;color:var(--ink-soft);text-decoration:line-through;margin-left:6px}

.empty-state{
  border:1.5px dashed var(--line-strong);border-radius:var(--radius-md);
  padding:48px 24px;text-align:center;color:var(--ink-soft);
}

/* ============================= VALUE PROP ============================= */
.value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.value-card{
  padding:28px 24px;border:1px solid var(--line);border-radius:var(--radius-md);
  background:var(--paper-raised);
}
.value-num{font-family:var(--font-mono);color:var(--amber);font-size:13px;font-weight:700;margin-bottom:16px;display:block}
.value-card h3{font-size:18px;margin-bottom:8px}
.value-card p{color:var(--ink-soft);font-size:14.5px}
@media (max-width:860px){.value-grid{grid-template-columns:1fr}}


/* ============================= BREADCRUMBS ============================= */
.breadcrumbs{padding:16px 24px 0;font-size:13px;color:var(--ink-soft)}
.breadcrumbs a{color:var(--ink-soft)}
.breadcrumbs a:hover{color:var(--blue)}
.breadcrumbs span[aria-hidden]{margin:0 6px;opacity:.5}
.breadcrumbs span[aria-current]{color:var(--ink);font-weight:600}

/* ============================= FOUNDERS ============================= */
.author-section{background:var(--ink);color:#fff}
.author-section .eyebrow{color:#8FB0FF}
.author-section .eyebrow::before{background:var(--amber)}
.founders-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:32px;margin-top:28px;
}
.founder-card{
  display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:start;
  padding:24px;border:1px solid rgba(255,255,255,.12);border-radius:var(--radius-md);
  background:rgba(255,255,255,.03);
}
.author-photo{
  width:88px;height:88px;border-radius:50%;flex-shrink:0;
  background:linear-gradient(135deg,var(--blue),#5C8CFF);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-size:26px;font-weight:700;
  border:3px solid rgba(255,255,255,.16);
  overflow:hidden;
}
.author-photo img{width:100%;height:100%;object-fit:cover}
.author-name{font-family:var(--font-display);font-size:19px;font-weight:700}
.author-role{color:#9FB0CC;font-size:13px;margin:4px 0 10px}
.author-bio{color:#C6D1E6;font-size:14px}
.author-socials{display:flex;gap:12px;margin-top:14px}
.author-socials a{
  width:34px;height:34px;border-radius:50%;
  border:1.5px solid rgba(255,255,255,.22);
  display:flex;align-items:center;justify-content:center;
  transition:border-color .15s ease, background .15s ease;
}
.author-socials a:hover{border-color:var(--amber);background:rgba(232,135,30,.12)}
.author-socials svg{width:14px;height:14px}
@media (max-width:820px){.founders-grid{grid-template-columns:1fr}}
@media (max-width:480px){.founder-card{grid-template-columns:1fr;text-align:center}.author-socials{justify-content:center}}

/* ============================= PARTNERS ============================= */
.partners-section{padding:56px 0 64px;border-top:1px solid var(--line)}
.partners-head{text-align:center;margin-bottom:28px}
.partners-head h2{font-size:clamp(22px,3.4vw,30px);font-weight:800;margin:12px 0 0}
.partners-grid{
  display:flex;flex-wrap:wrap;justify-content:center;gap:16px;margin-top:0;
}
.partner-card{
  display:flex;align-items:center;gap:16px;
  width:100%;max-width:340px;padding:16px 18px;
  background:#fff;border:1px solid var(--line);border-radius:16px;
  text-decoration:none;box-shadow:var(--shadow-sm);
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.partner-card:hover,.partner-card:focus-visible{
  transform:translateY(-3px);border-color:var(--blue);box-shadow:var(--shadow-md);
}
.partner-logo{
  width:64px;height:64px;border-radius:50%;flex-shrink:0;
  background:#fff;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;overflow:hidden;
  font-family:var(--font-display);font-size:18px;font-weight:700;color:var(--ink-soft);
}
.partner-logo img{width:100%;height:100%;object-fit:contain;padding:9px;box-sizing:border-box}
.partner-name{flex:1;min-width:0;font-size:16px;font-weight:700;color:var(--ink);text-align:left}
.partner-arrow{
  flex-shrink:0;width:34px;height:34px;border-radius:50%;
  background:var(--blue-tint);color:var(--blue);
  display:flex;align-items:center;justify-content:center;
  transition:background .18s ease,color .18s ease,transform .18s ease;
}
.partner-card:hover .partner-arrow,.partner-card:focus-visible .partner-arrow{
  background:var(--blue);color:#fff;transform:translateX(3px);
}
@media (max-width:480px){.partners-section{padding:40px 0 48px}}

/* ============================= FOOTER ============================= */
.site-footer{border-top:1px solid var(--line);padding:40px 0}
.footer-row{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px}
.footer-links{display:flex;gap:22px;flex-wrap:wrap}
.footer-links a{font-size:13.5px;color:var(--ink-soft)}
.footer-links a:hover{color:var(--ink)}
.footer-copy{font-size:13px;color:var(--ink-soft)}
.footer-socials{display:flex;gap:12px}
.footer-socials a{
  width:32px;height:32px;border-radius:50%;border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;color:var(--ink-soft);
}
.footer-socials a:hover{border-color:var(--blue);color:var(--blue)}
.footer-socials svg{width:14px;height:14px}

/* ============================= MODAL ============================= */
.modal-backdrop{
  position:fixed;inset:0;background:rgba(11,21,38,.55);
  display:flex;align-items:flex-end;justify-content:center;
  z-index:100;opacity:0;pointer-events:none;transition:opacity .2s ease;
  padding:0;
}
.modal-backdrop.open{opacity:1;pointer-events:auto}
.modal-card{
  background:var(--paper-raised);
  width:100%;max-width:520px;
  border-radius:var(--radius-lg) var(--radius-lg) 0 0;
  max-height:88vh;overflow-y:auto;
  padding:28px 26px 26px;
  transform:translateY(24px);
  transition:transform .22s ease;
}
.modal-backdrop.open .modal-card{transform:translateY(0)}
@media (min-width:640px){
  .modal-backdrop{align-items:center;padding:20px}
  .modal-card{border-radius:var(--radius-lg)}
}
.modal-close{
  position:absolute;top:16px;right:16px;
  width:34px;height:34px;border-radius:50%;
  background:var(--paper);border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
}
.modal-head{display:flex;gap:16px;align-items:flex-start;padding-right:36px}
.modal-cover{width:64px;flex-shrink:0}
.modal-title{font-family:var(--font-display);font-size:19px;font-weight:700;margin-bottom:4px}
.modal-price{font-family:var(--font-mono);font-weight:700;color:var(--blue-deep);font-size:18px}
.modal-badge{
  display:inline-flex;align-items:center;gap:6px;
  background:#EAFBF2;color:var(--green);
  font-size:12.5px;font-weight:600;
  padding:8px 12px;border-radius:8px;margin:20px 0 18px;
}
.modal-section-title{font-family:var(--font-mono);font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-soft);margin-bottom:8px}
.toc-list{list-style:none;padding:0;margin:0 0 22px;display:flex;flex-direction:column;gap:7px}
.toc-list li{font-size:14px;color:var(--ink-soft);padding-left:20px;position:relative}
.toc-list li::before{content:"—";position:absolute;left:0;color:var(--blue)}

.unlocked-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
.unlocked-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:12px 14px;border:1px solid var(--line);border-radius:8px;
  font-size:14px;font-weight:600;color:var(--blue-deep);
  background:var(--blue-tint);
}
.unlocked-list a:hover{border-color:var(--blue)}

/* ============================= REVIEWS PAGE ============================= */
.reviews-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px;
}
.review-card{
  background:var(--paper-raised);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:24px;display:flex;flex-direction:column;
}
.review-text{
  font-size:15px;color:var(--ink);line-height:1.55;flex:1;margin-bottom:20px;
}
.review-person{display:flex;align-items:center;gap:12px}
.review-photo{
  width:46px;height:46px;border-radius:50%;flex-shrink:0;overflow:hidden;
  background:linear-gradient(135deg,var(--blue),var(--blue-deep));
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-family:var(--font-display);font-weight:700;font-size:15px;
}
.review-photo img{width:100%;height:100%;object-fit:cover}
.review-name{font-weight:700;font-size:14.5px}
.review-job{font-size:12.5px;color:var(--ink-soft)}
.review-email{font-size:12px;color:var(--blue-deep);font-weight:600}
.review-email:hover{text-decoration:underline}


.catalog-subhead{
  font-family:var(--font-display);font-size:20px;font-weight:700;
  margin:0 0 20px;
}
.course-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:28px;
}
.course-card{
  background:var(--paper-raised);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  overflow:hidden;
  display:flex;flex-direction:column;
  cursor:pointer;
  transition:box-shadow .2s ease, transform .2s ease;
}
.course-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}
.course-thumb{
  position:relative;width:100%;aspect-ratio:16/9;
  background:linear-gradient(135deg,var(--blue),var(--blue-deep));
  overflow:hidden;
}
.course-thumb img{width:100%;height:100%;object-fit:cover;display:block}
.course-thumb-fallback{
  width:100%;height:100%;display:flex;flex-direction:column;justify-content:center;align-items:center;
  gap:6px;color:#fff;text-align:center;padding:0 16px;
}
.course-thumb-fallback .bc-mark{font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;opacity:.85}
.course-thumb-fallback .bc-title{font-family:var(--font-display);font-weight:700;font-size:15px;line-height:1.3}
.course-play{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:56px;height:56px;border-radius:50%;
  background:rgba(255,255,255,.92);color:var(--blue-deep);
  display:flex;align-items:center;justify-content:center;
  font-size:20px;padding-left:3px;
  box-shadow:0 8px 20px rgba(0,0,0,.25);
  transition:transform .2s ease;
}
.course-card:hover .course-play{transform:translate(-50%,-50%) scale(1.08)}
.course-play-flask{padding-left:0}
.course-lesson-badge{
  position:absolute;right:10px;bottom:10px;
  background:rgba(0,0,0,.72);color:#fff;font-size:11px;font-weight:600;
  padding:4px 9px;border-radius:5px;
}
.course-free-badge{
  position:absolute;left:10px;top:10px;
  background:var(--green);color:#fff;font-size:11px;font-weight:700;
  padding:4px 10px;border-radius:20px;text-transform:uppercase;letter-spacing:.03em;
}
.course-card-body{padding:18px;display:flex;flex-direction:column;gap:8px;flex:1}
.course-title{font-family:var(--font-display);font-size:17px;font-weight:700;line-height:1.3}
.course-desc{font-size:14px;color:var(--ink-soft);flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.course-meta{display:flex;align-items:center;justify-content:space-between;margin-top:2px}


.catalog-empty{
  border:1.5px dashed var(--line-strong);border-radius:var(--radius-md);
  padding:40px;text-align:center;color:var(--ink-soft);font-size:14px;margin-bottom:32px;
}
.catalog-filters{margin-bottom:28px;display:flex;flex-direction:column;gap:14px}
.catalog-search{
  width:100%;max-width:420px;padding:11px 14px;border-radius:8px;
  border:1px solid var(--line-strong);background:var(--paper-raised);
  font-size:14px;color:var(--ink);
}
.catalog-search:focus{outline:none;border-color:var(--blue)}
.cat-chips{display:flex;flex-wrap:wrap;gap:8px}
.cat-chip{
  padding:6px 14px;border-radius:20px;border:1px solid var(--line-strong);
  background:var(--paper-raised);font-size:13px;font-weight:600;color:var(--ink-soft);
  cursor:pointer;transition:all .15s ease;
}
.cat-chip:hover{border-color:var(--blue)}
.cat-chip.active{background:var(--blue);border-color:var(--blue);color:#fff}


.currency-dropdown{
  display:none;position:absolute;top:100%;left:0;right:0;z-index:20;
  background:#fff;border:1px solid #ddd;border-radius:8px;margin-top:4px;
  max-height:220px;overflow-y:auto;box-shadow:0 6px 20px rgba(0,0,0,.12);
}
.currency-option{padding:8px 12px;cursor:pointer;font-size:14px}
.currency-option:hover{background:#f3f3f3}


.skel{
  background:linear-gradient(90deg, var(--line) 25%, var(--paper-raised) 50%, var(--line) 75%);
  background-size:200% 100%;
  animation:skel-shimmer 1.4s ease-in-out infinite;
  border-radius:6px;
}
@keyframes skel-shimmer{
  0%{background-position:200% 0}
  100%{background-position:-200% 0}
}
.skel-line{height:14px;margin:8px 0}
.skel-card{border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden;background:var(--paper-raised)}
.skel-card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.skel-founder{display:flex;gap:14px;align-items:center;padding:16px 0}
.skel-founder-grid{display:flex;flex-direction:column;gap:4px}

.search-suggest{
  position:absolute;top:100%;left:0;right:0;max-width:420px;z-index:15;
  background:var(--paper-raised);border:1px solid var(--line-strong);border-radius:10px;
  margin-top:4px;box-shadow:var(--shadow-md);overflow:hidden;
}
.search-suggest-label{padding:8px 14px 4px;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.03em;color:var(--ink-soft)}
.search-suggest-item{
  display:block;width:100%;text-align:left;padding:9px 14px;font-size:13.5px;
  background:none;border:none;cursor:pointer;color:var(--ink);
}
.search-suggest-item:hover{background:var(--paper)}

.catalog-subhead-row{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px}
.catalog-subhead-row .catalog-subhead{margin-bottom:0}
.catalog-view-all{
  display:inline-flex;align-items:center;gap:5px;
  font-size:13.5px;font-weight:600;color:var(--blue);text-decoration:none;flex-shrink:0;
}
.catalog-view-all:hover{color:var(--blue-deep)}
.catalog-view-all svg{transition:transform .15s ease}
.catalog-view-all:hover svg{transform:translateX(3px)}

.nav-links a.active{
  color:var(--blue-deep);font-weight:700;
  position:relative;
}
.nav-links a.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;
  background:var(--blue);border-radius:2px;
}
.nav-links a:hover{color:var(--blue-deep)}

/* ============================= TUTORIAL MODAL ============================= */
.tutorial-backdrop{
  position:fixed;inset:0;background:rgba(11,21,38,.55);
  display:flex;align-items:center;justify-content:center;padding:20px;
  z-index:110;opacity:0;pointer-events:none;transition:opacity .2s ease;
}
.tutorial-backdrop.open{opacity:1;pointer-events:auto}
.tutorial-card{
  position:relative;background:var(--paper-raised);width:100%;max-width:640px;
  border-radius:var(--radius-lg);padding:28px;
  transform:translateY(16px);transition:transform .22s ease;
}
.tutorial-backdrop.open .tutorial-card{transform:translateY(0)}
.tutorial-card h3{font-size:20px;margin:0 0 6px;padding-right:36px}
.tutorial-card p{color:var(--ink-soft);font-size:14.5px;margin:0 0 18px}
.tutorial-video-wrap{border-radius:10px;overflow:hidden;margin-bottom:18px}

.hero-tutorial-link{
  display:inline-flex;align-items:center;gap:6px;
  background:none;border:none;padding:10px 4px;
  font-size:15px;font-weight:600;color:var(--ink-soft);cursor:pointer;
}
.hero-tutorial-link:hover{color:var(--blue)}

/* Signed-out account button: icon only on desktop, a clear full-width "Sign in" button inside the mobile menu */
.account-avatar-btn .guest-label{display:none}
@media (max-width:1180px){
  .account-avatar-btn.is-guest{
    width:100%;height:48px;border-radius:10px;gap:10px;
    background:var(--blue,#2F5FE0);color:#fff;border:none;
    font:inherit;font-size:16px;font-weight:700;margin:6px 0 10px;
  }
  .account-avatar-btn.is-guest svg{width:20px;height:20px}
  .account-avatar-btn.is-guest .guest-label{display:inline}
}

/* ==========================================================================
   "Everything you need to grow as a design engineer" — homepage offer strip
   (Mock Exams / E-Books & Courses / CAD Marketplace). Markup already existed
   with no matching rules, which is why it was rendering as unstyled text —
   this is what was missing.
   ========================================================================== */
.offer-strip{
  padding:48px 0 8px;
}
.offer-title{
  font-size:clamp(24px,3.6vw,32px);
  text-align:center;
  margin-bottom:28px;
}
.offer-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}
@media (max-width:860px){
  .offer-grid{grid-template-columns:1fr}
}
.offer-card{
  display:block;
  background:var(--paper-raised);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:26px 24px;
  transition:box-shadow .2s ease, transform .2s ease, border-color .2s ease;
}
.offer-card:hover{
  box-shadow:var(--shadow-md);
  transform:translateY(-3px);
  border-color:var(--blue);
}
.offer-card h3{
  font-size:17.5px;
  margin-bottom:8px;
}
.offer-card p{
  font-size:14px;
  color:var(--ink-soft);
  line-height:1.6;
}