/* Infochief E-books interactive library */
.ebook-library{background:linear-gradient(180deg,#f7f9fc 0,#fff 28%,#fff 100%);overflow:hidden}
.ebook-library-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:28px}
.ebook-library-heading h2{margin:4px 0 10px;font-size:clamp(1.75rem,3vw,2.55rem);line-height:1.15;color:#173b67}
.ebook-library-lead{max-width:820px;margin:0;color:#526272;line-height:1.75}
.ebook-slider{position:relative;margin:0 0 26px;padding:18px 0 20px;border-top:1px solid #dfe7f1;border-bottom:1px solid #dfe7f1}
.ebook-slider-toolbar{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:14px}
.ebook-slider-toolbar p{margin:0;color:#657586;font-size:.92rem}.ebook-slider-toolbar p span{color:#8795a4}
.ebook-slider-controls{display:flex;gap:8px}
.ebook-nav{width:42px;height:42px;border:1px solid #cad6e5;border-radius:50%;background:#fff;color:#255785;font-size:1.2rem;cursor:pointer;transition:.2s ease}
.ebook-nav:hover,.ebook-nav:focus-visible{background:#31659f;color:#fff;border-color:#31659f;transform:translateY(-1px)}
.ebook-slider-viewport{overflow-x:auto;overflow-y:hidden;scrollbar-width:none;outline:none;padding:8px 4px 14px;mask-image:linear-gradient(to right,transparent,#000 3%,#000 97%,transparent);-webkit-mask-image:linear-gradient(to right,transparent,#000 3%,#000 97%,transparent)}
.ebook-slider-viewport::-webkit-scrollbar{display:none}
.ebook-slider-track{display:flex;align-items:stretch;gap:18px;width:max-content;padding:0 18px}
.ebook-card{position:relative;flex:0 0 198px;width:198px;border:1px solid #dfe7f1;border-radius:18px;background:#fff;padding:12px 12px 16px;text-align:left;color:#173b67;cursor:pointer;box-shadow:0 9px 24px rgba(25,61,101,.08);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.ebook-card:hover,.ebook-card:focus-visible{transform:translateY(-5px);box-shadow:0 15px 34px rgba(25,61,101,.16);border-color:#8eb2d7;outline:none}
.ebook-card.is-selected{border-color:#31659f;box-shadow:0 0 0 2px rgba(49,101,159,.15),0 15px 34px rgba(25,61,101,.16)}
.ebook-card-cover{display:flex;align-items:center;justify-content:center;height:235px;border-radius:12px;background:#edf3f9;overflow:hidden;margin-bottom:13px}
.ebook-card-cover img{width:100%;height:100%;object-fit:contain;display:block}
.ebook-card-number{position:absolute;top:21px;left:21px;display:inline-grid;place-items:center;min-width:34px;height:28px;padding:0 8px;border-radius:999px;background:rgba(18,45,76,.88);color:#fff;font-size:.74rem;font-weight:700;letter-spacing:.06em}
.ebook-card strong{display:block;font-size:.93rem;line-height:1.4;min-height:2.8em}
.ebook-selection-status{margin:8px 0 22px;padding:11px 16px;border-radius:10px;background:#eef5fb;color:#526272;font-size:.92rem;border-left:3px solid #31659f}
.ebook-detail-wrapper{position:relative}
.ebook-detail{animation:ebookFade .32s ease both}
@keyframes ebookFade{from{opacity:.25;transform:translateY(8px)}to{opacity:1;transform:none}}
.ebook-detail-top{display:grid;grid-template-columns:minmax(240px,330px) minmax(0,1fr);gap:clamp(28px,5vw,70px);align-items:center;padding:clamp(24px,4vw,48px);border:1px solid #dfe7f1;border-radius:24px;background:#fff;box-shadow:0 16px 42px rgba(24,58,96,.08)}
.ebook-detail-cover{position:relative;display:flex;align-items:center;justify-content:center;min-height:390px;padding:18px;border-radius:18px;background:radial-gradient(circle at 40% 20%,#fff 0,#e9f0f7 58%,#dde8f3 100%)}
.ebook-detail-cover:after{content:"";position:absolute;left:14%;right:14%;bottom:14px;height:20px;border-radius:50%;background:rgba(13,43,75,.18);filter:blur(11px)}
.ebook-detail-cover img{position:relative;z-index:1;display:block;max-width:100%;max-height:430px;object-fit:contain;filter:drop-shadow(0 14px 16px rgba(18,45,76,.24))}
.ebook-detail-copy{min-width:0}.ebook-detail-index{margin:0 0 7px;color:#8a99a8;font-size:.77rem;font-weight:700;letter-spacing:.12em}
.ebook-detail-copy h2{margin:3px 0 18px;color:#173b67;font-size:clamp(1.8rem,3.2vw,2.7rem);line-height:1.16}
.ebook-intro{margin:0;color:#4e5f70;font-size:1.02rem;line-height:1.85}
.ebook-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}.ebook-action{min-height:48px;display:inline-flex;align-items:center;justify-content:center;gap:8px}
.ebook-buy{border:1px solid #31659f!important;color:#31659f!important;background:#fff!important}.ebook-buy:hover,.ebook-buy:focus-visible{background:#31659f!important;color:#fff!important}
.ebook-action.is-disabled{opacity:.58;cursor:not-allowed;filter:grayscale(.2)}
.ebook-download-note{margin:12px 0 0;color:#7a8998;font-size:.86rem;line-height:1.55}
.ebook-preview-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin:45px 0 18px}.ebook-preview-head h3{margin:3px 0 0;color:#173b67;font-size:clamp(1.4rem,2.4vw,2rem)}.ebook-preview-head>p{margin:0;color:#7b8b9b;font-size:.9rem}
.ebook-preview-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;align-items:start}
.ebook-preview-item{margin:0;padding:10px;border:1px solid #dde6ef;border-radius:14px;background:#f8fafc;box-shadow:0 10px 25px rgba(23,59,103,.07);overflow:hidden}
.ebook-preview-item img{display:block;width:100%;height:auto;aspect-ratio:612/792;object-fit:contain;background:#fff;border-radius:8px;transition:transform .25s ease}
.ebook-preview-item:hover img{transform:scale(1.015)}
@media (max-width:900px){.ebook-library-heading{align-items:flex-start;flex-direction:column}.ebook-detail-top{grid-template-columns:1fr}.ebook-detail-cover{min-height:320px}.ebook-detail-cover img{max-height:380px}.ebook-preview-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.ebook-card{flex-basis:176px;width:176px}.ebook-card-cover{height:214px}}
@media (max-width:600px){.ebook-slider-toolbar p span{display:none}.ebook-card{flex-basis:150px;width:150px;padding:10px}.ebook-card-cover{height:188px}.ebook-card strong{font-size:.82rem}.ebook-detail-top{padding:18px;border-radius:18px}.ebook-detail-cover{min-height:270px;padding:12px}.ebook-actions{flex-direction:column}.ebook-action{width:100%}.ebook-preview-head{align-items:flex-start;flex-direction:column}.ebook-preview-grid{grid-template-columns:1fr;gap:14px}.ebook-slider-viewport{mask-image:none;-webkit-mask-image:none}}
@media (prefers-reduced-motion:reduce){.ebook-card,.ebook-preview-item img,.ebook-nav{transition:none}.ebook-detail{animation:none}}