.books-hero{position:relative;padding:160px 0 60px;background-color:#0d1117;color:#fff;overflow:hidden;min-height:400px}.books-hero:before{content:"";position:absolute;top:-20%;left:-10%;width:60%;height:60%;background:radial-gradient(circle,rgba(45,112,255,.15) 0%,transparent 60%);filter:blur(60px);z-index:1}.books-hero:after{content:"";position:absolute;bottom:-20%;right:-10%;width:60%;height:60%;background:radial-gradient(circle,rgba(65,194,224,.15) 0%,transparent 60%);filter:blur(60px);z-index:1}.books-hero .container{position:relative;z-index:5}.hero-title{font-size:3.5rem;font-weight:800;letter-spacing:-1px;margin-bottom:20px;background:linear-gradient(135deg,#fff,#b3b9c5);background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent}.hero-subtitle{font-size:1.15rem;color:#a3aab8;max-width:600px;margin:0 auto;line-height:1.6}.section-bundle{background:linear-gradient(180deg,#0d1117,#151a28);padding:40px 0 100px;position:relative}.bundle-glass-card{display:flex;flex-direction:column;background:#ffffff08;backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border:1px solid rgba(255,255,255,.08);border-radius:32px;padding:50px;position:relative;z-index:10;box-shadow:0 40px 80px #0000004d,inset 0 1px #ffffff1a;overflow:hidden;color:#fff}@media(min-width:900px){.bundle-glass-card{flex-direction:row;align-items:center;justify-content:space-between;padding:60px 80px}}.bundle-content{flex:1;max-width:500px}.bundle-content h2{font-size:2.8rem;font-weight:800;letter-spacing:-.5px;margin:20px 0 15px;background:linear-gradient(135deg,#fff,#d1d5db);background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent}.bundle-content p{font-size:1.1rem;color:#9ca3af;line-height:1.6;margin-bottom:30px}.badge{display:inline-block;background:linear-gradient(135deg,#ff6b6b,#ff8e53);color:#fff;padding:6px 16px;border-radius:30px;font-size:.75rem;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;box-shadow:0 4px 15px #ff6b6b4d}.price-tag{font-size:2.2rem;font-weight:800;margin-bottom:30px;color:#fff;display:flex;align-items:baseline;gap:8px}.btn-glow{background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-secondary) 100%);color:#fff;border:none;padding:16px 36px;border-radius:30px;font-size:1.1rem;font-weight:700;cursor:pointer;box-shadow:0 10px 25px #2d70ff66;transition:all .3s cubic-bezier(.25,.8,.25,1)}.btn-glow:hover{box-shadow:0 15px 35px #2d70ff99;transform:translateY(-3px)}.bundle-visual{flex:1;display:flex;justify-content:center;align-items:center;margin-top:40px}@media(min-width:900px){.bundle-visual{margin-top:0;justify-content:flex-end}}.book-stack-real{position:relative;width:180px;height:250px;transform-style:preserve-3d;transform:perspective(1000px) rotateY(-15deg) rotateX(10deg)}.real-book{position:absolute;width:160px;height:220px;border-radius:4px 12px 12px 4px;box-shadow:-5px 10px 25px #0009,inset 2px 0 5px #ffffff4d;transition:transform .5s cubic-bezier(.175,.885,.32,1.275);overflow:hidden;background-color:#e2e8f0}.real-book img{width:100%;height:100%;object-fit:cover}.real-book:after{content:"";position:absolute;inset:0;box-shadow:inset 4px 0 10px #0000004d,inset -2px 0 5px #fff3;pointer-events:none}.b3{transform:translateZ(-80px) translate(60px) translateY(-20px);z-index:1;filter:brightness(.7);transition:all .5s ease}.b2{transform:translateZ(-40px) translate(30px) translateY(-10px);z-index:2;filter:brightness(.85);transition:all .5s ease}.b1{transform:translateZ(0) translate(0) translateY(0);z-index:3;transition:all .5s ease}.bundle-glass-card:hover .b1{transform:translateZ(20px) translate(-10px);filter:brightness(1.05)}.bundle-glass-card:hover .b2{transform:translateZ(-30px) translate(45px) translateY(-15px);filter:brightness(1)}.bundle-glass-card:hover .b3{transform:translateZ(-80px) translate(90px) translateY(-30px);filter:brightness(.9)}.section-books{background-color:#f8fafc;padding:100px 0}.section-books .section-title{font-weight:800;color:#0f172a;margin-bottom:60px}.books-grid{display:grid;grid-template-columns:minmax(280px,1fr);gap:40px}@media(min-width:768px){.books-grid{grid-template-columns:repeat(3,1fr)}}.book-card{display:flex;flex-direction:column;background:#fff;border-radius:24px;overflow:hidden;transition:transform .4s cubic-bezier(.175,.885,.32,1.275),box-shadow .4s ease;border:1px solid rgba(0,0,0,.03);box-shadow:0 15px 35px #0000000a}.book-card:hover{transform:translateY(-12px);box-shadow:0 30px 60px #00000014}.book-cover-wrapper{padding:40px 30px 0;display:flex;justify-content:center;background:#f1f5f9}.book-cover-3d{position:relative;width:160px;height:220px;border-radius:4px 14px 14px 4px;transform:perspective(800px) rotateY(-10deg);transition:transform .5s ease;box-shadow:-15px 0 30px -10px #0003,inset 2px 0 5px #fff3}.book-card:hover .book-cover-3d{transform:perspective(800px) rotateY(0)}.book-cover-3d:after{content:"";position:absolute;top:2px;bottom:2px;right:-8px;width:8px;background:#f8f9fa;border-radius:0 4px 4px 0;box-shadow:inset -2px 0 4px #0000000d;transform-origin:left;transform:rotateY(80deg)}.book-cover-image{width:100%;height:100%;object-fit:cover;border-radius:4px 14px 14px 4px;background-color:#e2e8f0}.book-info{padding:30px;flex:1;display:flex;flex-direction:column}.book-info h3{font-size:1.4rem;font-weight:700;color:#1e293b;margin-bottom:12px;line-height:1.3}.book-desc{font-size:.95rem;color:#64748b;margin-bottom:30px;flex:1;line-height:1.6}.format-selection{display:flex;flex-direction:column;gap:15px}.format-item{display:flex;flex-direction:column;background:#f8fafc;padding:16px;border-radius:16px;border:1px solid #f1f5f9}.format-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.format-label{font-weight:700;font-size:.9rem;color:#334155;text-transform:uppercase;letter-spacing:.5px}.format-price{font-weight:800;color:var(--color-primary);font-size:1.1rem}.lang-buttons{display:grid;grid-template-columns:1fr 1fr;gap:10px}.btn-small{padding:10px;border-radius:10px;background:#fff;border:1px solid #e2e8f0;color:#475569;font-size:.85rem;font-weight:700;cursor:pointer;transition:all .2s cubic-bezier(.4,0,.2,1);display:flex;align-items:center;justify-content:center;gap:6px}.btn-small:before{content:"Add";font-size:.75rem;opacity:.7;font-weight:600}.btn-small:hover{background:var(--color-primary);color:#fff;border-color:var(--color-primary);transform:translateY(-2px);box-shadow:0 4px 12px #2d70ff33}.btn-small:hover:before{opacity:1}.legal-disclaimer{margin-top:80px;padding:40px;background:#fff;border:1px solid #e2e8f0;border-radius:20px;font-size:.95rem;color:#64748b;line-height:1.6}.legal-disclaimer h4{margin-bottom:15px;color:#334155;font-weight:700}