.learn-hero{position:relative;padding:calc(var(--nav-height) + 48px) 0 var(--section-sm);overflow:hidden}.learn-hero__bg{position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(ellipse 60% 50% at 50% 0%,rgba(59,130,246,.06) 0%,transparent 70%),linear-gradient(180deg,var(--black) 0%,var(--charcoal) 100%);z-index:0}.learn-hero__content{position:relative;z-index:1}.learn-hero__eyebrow{display:inline-block;font-family:var(--font-mono);font-size:var(--text-micro);font-weight:600;text-transform:uppercase;letter-spacing:.12em;color:var(--blue);margin-bottom:12px}.learn-hero__title{font-size:var(--text-h1);font-weight:700;color:var(--offwhite);margin:0 0 12px;line-height:1.2}.learn-hero__subtitle{font-size:var(--text-body);color:var(--gray-light);max-width:560px;line-height:1.6;margin:0}.bookshelf{padding:var(--section-sm) 0 var(--section-md)}.bookshelf__grid{display:grid;grid-template-columns:1fr;gap:32px}.book-card{display:grid;grid-template-columns:auto 1fr;gap:32px;background:var(--charcoal);border:1px solid var(--ghost-gray);border-radius:var(--radius-sm);padding:24px;transition:border-color var(--transition-base)}.book-card:hover{border-color:var(--blue)}.book-card__cover-wrap{position:relative;width:300px;flex-shrink:0}.book-card__cover{width:100%;height:auto;aspect-ratio:800 / 619;object-fit:contain;border-radius:var(--radius-sm);box-shadow:4px 4px 16px #0006,1px 1px 3px #0000004d;transition:transform var(--transition-base),box-shadow var(--transition-base)}.book-card:hover .book-card__cover{transform:translateY(-2px);box-shadow:6px 8px 24px #00000080,2px 2px 6px #0000004d}.book-card__cover-wrap:before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:3px;background:linear-gradient(180deg,#3b82f666,#3b82f61a);border-radius:1px 0 0 1px;z-index:1}.book-card__info{display:flex;flex-direction:column;justify-content:center;gap:12px}.book-card__badge{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-mono);font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--blue);width:fit-content}.book-card__badge svg{width:14px;height:14px}.book-card__title{font-size:var(--text-h2);font-weight:700;color:var(--offwhite);margin:0;line-height:1.25}.book-card__author{font-size:var(--text-small);color:var(--gray-light);margin:0}.book-card__description{font-size:var(--text-small);color:var(--gray-medium);line-height:1.65;margin:0;max-width:480px}.book-card__meta{display:flex;gap:16px;flex-wrap:wrap}.book-card__meta-item{display:flex;align-items:center;gap:5px;font-family:var(--font-mono);font-size:11px;color:var(--gray-medium);text-transform:uppercase;letter-spacing:.04em}.book-card__meta-item svg{width:13px;height:13px;opacity:.6}.book-card__actions{display:flex;gap:10px;margin-top:4px}.book-card__read-btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;background:var(--blue);color:#fff;font-family:var(--font-primary);font-size:var(--text-small);font-weight:600;border:none;border-radius:var(--radius-sm);cursor:pointer;text-decoration:none;transition:background var(--transition-fast),transform var(--transition-fast)}.book-card__read-btn:hover{background:var(--blue-dark);transform:translateY(-1px)}.book-card__read-btn svg{width:16px;height:16px}.book-card__buy-btn{background:transparent;color:var(--operator-green, #22c55e);border:1px solid var(--operator-green, #22c55e)}.book-card__buy-btn:hover{background:var(--operator-green, #22c55e);color:#fff}.book-card__download-btn{display:inline-flex;align-items:center;gap:6px;padding:10px 16px;background:transparent;color:var(--gray-light);font-family:var(--font-primary);font-size:var(--text-small);font-weight:500;border:1px solid var(--ghost-gray);border-radius:var(--radius-sm);cursor:pointer;text-decoration:none;transition:border-color var(--transition-fast),color var(--transition-fast)}.book-card__download-btn:hover{border-color:var(--gray-light);color:var(--offwhite)}.book-card__download-btn svg{width:14px;height:14px}.reader{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;background:var(--black);z-index:100}.reader__toolbar{display:flex;align-items:center;justify-content:space-between;height:48px;padding:0 16px;background:var(--charcoal);border-bottom:1px solid var(--ghost-gray);flex-shrink:0;z-index:10}.reader__toolbar-left{display:flex;align-items:center;gap:12px}.reader__back{display:inline-flex;align-items:center;gap:6px;color:var(--gray-light);font-family:var(--font-primary);font-size:13px;font-weight:500;text-decoration:none;padding:4px 8px;border-radius:var(--radius-sm);transition:color var(--transition-fast),background var(--transition-fast)}.reader__back:hover{color:var(--offwhite);background:var(--slate)}.reader__back svg{width:16px;height:16px}.reader__title{font-size:13px;font-weight:600;color:var(--offwhite);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.reader__toolbar-center{display:flex;align-items:center;gap:8px}.reader__page-info{font-family:var(--font-mono);font-size:12px;color:var(--gray-medium);letter-spacing:.02em;min-width:80px;text-align:center;-webkit-user-select:none;user-select:none}.reader__toolbar-right{display:flex;align-items:center;gap:4px}.reader__tool-btn{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;background:none;border:none;color:var(--gray-light);cursor:pointer;border-radius:var(--radius-sm);transition:color var(--transition-fast),background var(--transition-fast)}.reader__tool-btn:hover{color:var(--offwhite);background:var(--slate)}.reader__tool-btn svg{width:18px;height:18px}.reader__viewport{flex:1;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden;user-select:none;-webkit-user-select:none}.reader__book{position:relative;perspective:1800px;transform-style:preserve-3d}.reader__page-container{position:relative;width:100%;height:100%;transform-style:preserve-3d}.reader__page{position:absolute;top:0;left:0;width:100%;height:100%;backface-visibility:hidden;-webkit-backface-visibility:hidden;background:#fff;border-radius:1px;box-shadow:0 2px 12px #00000040}.reader__flip{position:absolute;top:0;width:50%;height:100%;transform-style:preserve-3d;transform-origin:left center;transition:transform .6s ease-in-out;z-index:5;left:50%}.reader__flip--back{transform-origin:right center;left:0}.reader__flip-front,.reader__flip-back{position:absolute;top:0;left:0;width:100%;height:100%;backface-visibility:hidden;-webkit-backface-visibility:hidden;overflow:hidden}.reader__flip-back{transform:rotateY(180deg)}.reader__shadow{position:absolute;top:0;width:50%;height:100%;pointer-events:none;opacity:0;transition:opacity .6s ease-in-out;z-index:6}.reader__shadow--left{left:0;background:linear-gradient(to right,transparent,rgba(0,0,0,.15))}.reader__shadow--right{right:0;background:linear-gradient(to left,transparent,rgba(0,0,0,.15))}.reader__nav-zone{position:absolute;top:0;bottom:0;width:25%;cursor:pointer;z-index:8;display:flex;align-items:center;opacity:0;transition:opacity var(--transition-fast)}.reader__nav-zone:hover{opacity:1}.reader__nav-zone--prev{left:0;justify-content:flex-start;padding-left:16px}.reader__nav-zone--next{right:0;justify-content:flex-end;padding-right:16px}.reader__nav-icon{width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:#00000080;border-radius:50%;color:#fff;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.reader__nav-icon svg{width:20px;height:20px}.reader__progress{height:3px;background:var(--charcoal);flex-shrink:0}.reader__progress-bar{height:100%;background:var(--blue);transition:width .3s ease;border-radius:0 1px 1px 0}.reader__loading{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;color:var(--gray-medium);font-family:var(--font-mono);font-size:13px}.reader__loading-spinner{width:24px;height:24px;border:2px solid var(--ghost-gray);border-top-color:var(--blue);border-radius:50%;animation:reader-spin .8s linear infinite}@keyframes reader-spin{to{transform:rotate(360deg)}}.reader__canvas-wrap{display:flex;align-items:center;justify-content:center;width:100%;height:100%}.reader__canvas-wrap canvas{max-width:100%;max-height:100%;box-shadow:0 4px 24px #0006;border-radius:1px}.reader__swipe-hint{position:absolute;bottom:24px;left:50%;transform:translate(-50%);font-family:var(--font-mono);font-size:11px;color:var(--gray-medium);opacity:.7;pointer-events:none;animation:reader-hint-fade 3s ease forwards}@keyframes reader-hint-fade{0%,60%{opacity:.7}to{opacity:0;display:none}}@media(max-width:768px){.book-card{grid-template-columns:1fr;text-align:center}.book-card__cover-wrap{width:240px;margin:0 auto}.book-card__info{align-items:center}.book-card__description{max-width:100%}.book-card__meta,.book-card__actions{justify-content:center}.reader__toolbar{padding:0 8px}.reader__title{display:none}.reader__nav-zone{width:35%}.reader__tool-btn{width:28px;height:28px}}@media(max-width:480px){.book-card__cover-wrap{width:210px}.book-card__actions{flex-direction:column;width:100%}.book-card__read-btn,.book-card__download-btn{justify-content:center;width:100%}}