/* Masterskills e-books library — Corporate Premium
   Page-specific body improvements. Header, hero and footer are deliberately untouched.
   Includes responsive library cards, TOC previews, FAQ and editorial rhythm. */

#main-content.about-main > .ebook-premium-section {
  position:relative;
  display:block;
  width:min(calc(100% - 40px), var(--container, 1320px));
  margin:38px auto 40px;
  padding:22px;
  background:#fff !important;
  border:4px solid #171a1e;
  border-radius:17px;
  box-shadow:12px 12px 0 #e8eef7;
  isolation:isolate;
}
#main-content.about-main > .ebook-premium-section > .container {
  width:100%;
  max-width:none;
  margin:0;
  padding:40px 34px 43px;
  background:#f5f7f9;
  border-radius:11px;
  min-width:0;
}
#main-content.about-main > .ebook-premium-section .section-heading {
  max-width:1020px;
  margin:0 auto 34px;
  text-align:center;
}
#main-content.about-main > .ebook-premium-section .ebook-section-kicker {
  margin:0 auto 12px;
  color:#bd7b13;
  font:800 13px/1.35 Tahoma,Arial,sans-serif;
  letter-spacing:1.65px;
  text-transform:uppercase;
}
#main-content.about-main > .ebook-premium-section .section-heading h2 {
  max-width:950px;
  margin:0 auto;
  color:#103d61;
  font:800 clamp(25px,2.4vw,36px)/1.22 Tahoma,Arial,sans-serif;
  letter-spacing:-.45px;
  text-wrap:balance;
}
#main-content.about-main > .ebook-premium-section .section-heading h2::after {
  width:84px;
  height:2px;
  margin:17px auto 20px;
  background:#d69b32;
}
#main-content.about-main > .ebook-premium-section .section-heading > p:not(.ebook-section-kicker) {
  margin:0 auto;
  max-width:880px;
  color:#526a7e;
  font:400 15px/1.7 Tahoma,Arial,sans-serif;
}
#main-content.about-main > .ebook-premium-section .solution-grid {
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  align-items:stretch;
  gap:18px;
}
#main-content.about-main > .ebook-premium-section .solution-card {
  min-width:0;
  min-height:0;
  margin:0;
  padding:26px 20px;
  border:1px solid #dbe5ed;
  border-radius:13px;
  background:#fff;
  box-shadow:0 8px 21px rgba(16,61,97,.045);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
#main-content.about-main > .ebook-premium-section .solution-card:hover {
  transform:translateY(-3px);
  border-color:#b6d1df;
  box-shadow:0 14px 27px rgba(16,61,97,.12);
}
/* Book library: fixed art region, equal title/description space, aligned actions */
#main-content.about-main .ebook-featured-grid .solution-card {
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:0;
  padding:22px 18px 21px;
  text-align:center;
}
#main-content.about-main .ebook-card-overline {
  min-height:29px;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  margin:0 auto 12px;
  color:#ba7a17;
  font-size:10px;
  font-weight:800;
  letter-spacing:.65px;
  line-height:1.4;
  text-transform:uppercase;
}
#main-content.about-main .ebook-card-number {
  flex:none;
  display:inline-grid;
  place-items:center;
  width:26px;
  height:26px;
  border-radius:50%;
  color:#103d61;
  background:#fff1d8;
  letter-spacing:0;
  font-size:11px;
}
#main-content.about-main .ebook-featured-grid .solution-card > img {
  display:block;
  width:auto;
  max-width:min(100%,195px);
  height:245px;
  margin:0 auto 19px;
  object-fit:contain;
  object-position:center;
  border-radius:3px;
  filter:drop-shadow(0 9px 11px rgba(15,45,65,.16));
}
#main-content.about-main .ebook-featured-grid .solution-card > h3 {
  margin:0 0 13px;
  min-height:54px;
  display:flex;
  align-items:center;
  justify-content:center;
  color:#103d61;
  font:800 17px/1.35 Tahoma,Arial,sans-serif;
  text-wrap:balance;
}
#main-content.about-main .ebook-featured-grid .solution-card > p {
  margin:0 0 11px;
  font:400 13px/1.62 Tahoma,Arial,sans-serif;
  color:#526b7f;
}
#main-content.about-main .ebook-featured-grid .solution-card > p strong {color:#174363}
#main-content.about-main .ebook-featured-grid .solution-card > p:last-child {
  align-self:stretch;
  width:100%;
  margin:auto 0 0;
  padding-top:15px;
}
#main-content.about-main .ebook-book-action {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:40px;
  width:100%;
  max-width:185px;
  padding:10px 14px;
  border:1px solid #103d61;
  border-radius:8px;
  background:#103d61;
  color:#fff;
  font:800 12px/1.4 Tahoma,Arial,sans-serif;
  text-decoration:none;
  transition:background .2s ease,transform .2s ease;
}
#main-content.about-main .ebook-book-action:hover,
#main-content.about-main .ebook-book-action:focus-visible {
  background:#0a608d;
  transform:translateY(-1px);
  color:#fff;
}
/* Value and audience cards share the same typographic system */
#main-content.about-main .ebook-info-grid .solution-card {
  text-align:center;
  padding:24px 21px 26px;
}
#main-content.about-main .ebook-info-grid .solution-icon {
  display:grid;
  place-items:center;
  width:94px;
  height:74px;
  margin:0 auto 19px;
  border:2px solid #1b1b1b;
  border-radius:13px;
  background:#ffa11b;
  box-shadow:6px 6px 0 #e1e7eb;
  color:#101010;
  font:800 23px/1 Tahoma,Arial,sans-serif;
}
#main-content.about-main .ebook-info-grid .solution-card h3 {
  margin:0 0 10px;
  min-height:48px;
  display:flex;
  align-items:center;
  justify-content:center;
  color:#103d61;
  font:800 17px/1.35 Tahoma,Arial,sans-serif;
}
#main-content.about-main .ebook-info-grid .solution-card > p {
  margin:0;
  color:#526b7f;
  font:400 13.5px/1.65 Tahoma,Arial,sans-serif;
}
/* Four TOC galleries: equally sized, scrollable with native touch/mouse fallback. */
#main-content.about-main .ebook-toc-grid {
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:21px;
  width:100%;
  min-width:0;
}
#main-content.about-main .ebook-toc-grid .cd-section {
  display:flex;
  flex-direction:column;
  min-width:0;
  padding:23px 22px 19px;
  border:1px solid #dbe5ed;
  border-radius:14px;
  background:#fff;
  box-shadow:0 9px 24px rgba(16,61,97,.045);
  scroll-margin-top:115px;
  overflow:hidden;
}
#main-content.about-main .ebook-toc-grid .cd-section > h2 {
  margin:0 0 10px;
  color:#103d61;
  font:800 19px/1.35 Tahoma,Arial,sans-serif;
}
#main-content.about-main .ebook-toc-grid .cd-section > h2::before {
  width:10px;
  height:10px;
  margin-right:10px;
  vertical-align:1px;
  background:#d59a30;
}
#main-content.about-main .ebook-toc-grid .cd-section > p {
  min-height:62px;
  margin:0 0 14px;
  color:#526a7e;
  font:400 13.5px/1.62 Tahoma,Arial,sans-serif;
}
#main-content.about-main [data-ebook-viewport] {
  width:100%;
  min-width:0;
  overflow-x:auto;
  overscroll-behavior-x:contain;
  scrollbar-width:thin;
  scrollbar-color:#bdcbd7 #f3f7fa;
  scroll-snap-type:x proximity;
  border:1px solid #e0e8ee;
  border-radius:9px;
  background:#f9fbfc;
}
#main-content.about-main [data-ebook-slider] {
  display:flex;
  align-items:stretch;
  gap:13px;
  width:max-content;
  padding:13px;
}
#main-content.about-main [data-ebook-slide] {
  display:flex;
  flex:0 0 174px;
  align-items:center;
  justify-content:center;
  width:174px;
  height:234px;
  min-width:0;
  padding:7px;
  border:1px solid #e0e8ee;
  border-radius:7px;
  background:#fff;
  scroll-snap-align:start;
  transition:border-color .2s ease,box-shadow .2s ease;
}
#main-content.about-main [data-ebook-slide]:hover,
#main-content.about-main [data-ebook-slide]:focus-visible {
  border-color:#d59a30;
  box-shadow:0 5px 15px rgba(16,61,97,.12);
}
#main-content.about-main [data-ebook-slide] img {
  width:100%;
  height:100%;
  max-width:100%;
  object-fit:contain;
  object-position:center;
  display:block;
}
#main-content.about-main [data-ebook-controls] {
  display:flex;
  justify-content:flex-end;
  gap:10px;
  padding-top:15px;
  margin-top:auto;
}
#main-content.about-main [data-ebook-controls] button {
  display:grid;
  place-items:center;
  width:37px;
  height:37px;
  border:1px solid #bdd0df;
  border-radius:50%;
  background:#fff;
  color:#103d61;
  font-size:25px;
  cursor:pointer;
  transition:background .2s ease,color .2s ease;
}
#main-content.about-main [data-ebook-controls] button:hover,
#main-content.about-main [data-ebook-controls] button:focus-visible {
  color:#fff;
  background:#103d61;
  border-color:#103d61;
}
/* FAQ: purposeful white panels, readable summaries, visible open state. */
#main-content.about-main .ebook-faq-grid {
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  align-items:start;
  gap:15px;
  max-width:1160px;
  margin:0 auto;
}
#main-content.about-main .ebook-faq-grid > details {
  min-width:0;
  border:1px solid #d7e3eb;
  border-radius:12px;
  background:#fff;
  overflow:hidden;
  box-shadow:0 6px 19px rgba(16,61,97,.045);
}
#main-content.about-main .ebook-faq-grid summary {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  min-height:71px;
  padding:18px 20px;
  cursor:pointer;
  list-style:none;
  color:#103d61;
  background:#fff;
  font:800 15px/1.45 Tahoma,Arial,sans-serif;
  text-transform:none;
}
#main-content.about-main .ebook-faq-grid summary::-webkit-details-marker {display:none}
#main-content.about-main .ebook-faq-grid summary::after {
  content:'+';
  flex:none;
  color:#b77813;
  font:400 27px/1 Tahoma,Arial,sans-serif;
}
#main-content.about-main .ebook-faq-grid details[open] summary {background:#f3f8fb}
#main-content.about-main .ebook-faq-grid details[open] summary::after {content:'−'}
#main-content.about-main .ebook-faq-grid .cd-panel {
  margin:0;
  padding:18px 20px 20px;
  border:0;
  border-top:1px solid #e1eaf0;
  border-radius:0;
  box-shadow:none;
}
#main-content.about-main .ebook-faq-grid .cd-panel p {
  margin:0;
  color:#526a7f;
  font:400 14px/1.7 Tahoma,Arial,sans-serif;
}
#main-content.about-main .ebook-faq-grid a {color:#0b669c;text-decoration:underline;text-underline-offset:3px}
#main-content.about-main .ebook-premium-section a:focus-visible,
#main-content.about-main .ebook-premium-section summary:focus-visible,
#main-content.about-main .ebook-premium-section button:focus-visible {
  outline:3px solid #d59a30;
  outline-offset:3px;
}
@media (max-width:1080px) {
  #main-content.about-main > .ebook-premium-section > .container {padding:33px 23px 35px}
  #main-content.about-main > .ebook-premium-section .solution-grid {grid-template-columns:repeat(2,minmax(0,1fr))}
  #main-content.about-main .ebook-featured-grid .solution-card > img {height:248px}
}
@media (max-width:680px) {
  #main-content.about-main > .ebook-premium-section {
    width:calc(100% - 20px);
    padding:10px;
    margin:22px auto 30px;
    border-width:3px;
    border-radius:13px;
    box-shadow:7px 7px 0 #e8eef7;
  }
  #main-content.about-main > .ebook-premium-section > .container {
    padding:26px 15px 29px;
    border-radius:8px;
  }
  #main-content.about-main > .ebook-premium-section .section-heading {margin-bottom:24px}
  #main-content.about-main > .ebook-premium-section .section-heading h2 {font-size:clamp(23px,6vw,29px);line-height:1.27}
  #main-content.about-main > .ebook-premium-section .section-heading > p:not(.ebook-section-kicker) {font-size:14px;line-height:1.6}
  #main-content.about-main > .ebook-premium-section .solution-grid {grid-template-columns:1fr;gap:14px}
  #main-content.about-main .ebook-featured-grid .solution-card {padding:21px 17px}
  #main-content.about-main .ebook-featured-grid .solution-card > img {height:240px}
  #main-content.about-main .ebook-featured-grid .solution-card > h3 {min-height:0}
  #main-content.about-main .ebook-info-grid .solution-card h3 {min-height:0}
  #main-content.about-main .ebook-toc-grid {grid-template-columns:1fr;gap:15px}
  #main-content.about-main .ebook-toc-grid .cd-section {padding:20px 15px 16px}
  #main-content.about-main .ebook-toc-grid .cd-section > p {min-height:0}
  #main-content.about-main .ebook-faq-grid {grid-template-columns:1fr;gap:12px}
  #main-content.about-main .ebook-faq-grid summary {min-height:62px;padding:16px 14px}
  #main-content.about-main .ebook-faq-grid .cd-panel {padding:15px}
  #main-content.about-main [data-ebook-slide] {flex-basis:152px;width:152px;height:205px}
}
@media (prefers-reduced-motion:reduce) {
  #main-content.about-main .ebook-premium-section .solution-card,
  #main-content.about-main .ebook-premium-section .ebook-book-action,
  #main-content.about-main .ebook-premium-section [data-ebook-slide] {transition:none}
}