@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap";:root{--bg-primary:#fff;--bg-secondary:#f5f5f7;--text-primary:#1d1d1f;--text-secondary:#86868b;--accent:#0071e3;--accent-hover:#0077ed;--border-light:#00000014;--shadow-sm:0 4px 12px #0000000d;--shadow-md:0 10px 30px #0000001a;--shadow-lg:0 20px 50px #0000001f;--duration-fast:.2s;--duration-norm:.4s;--ease-apple:cubic-bezier(.25, .1, .25, 1)}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5}a{color:inherit;text-decoration:none}ul{list-style:none}h1,h2,h3,h4,h5,h6{letter-spacing:-.02em;font-weight:600}button{cursor:pointer;background:0 0;border:none;font-family:inherit}.container{max-width:1200px;margin:0 auto;padding:0 24px}.glass{-webkit-backdrop-filter:saturate(180%)blur(20px);background:#ffffffb3}.navbar{border-bottom:1px solid var(--border-light);z-index:100;height:64px;transition:background-color var(--duration-fast) ease;position:fixed;top:0;left:0;right:0}.nav-container{justify-content:space-between;align-items:center;height:100%;display:flex}.nav-logo{letter-spacing:-.02em;font-size:1.125rem;font-weight:700}.nav-links{gap:32px;display:flex}.nav-link{color:var(--text-secondary);transition:color var(--duration-fast) var(--ease-apple);font-size:.875rem;font-weight:500}.nav-link:hover{color:var(--text-primary)}.nav-actions{align-items:center;display:flex}.nav-icon-btn{color:var(--text-secondary);transition:color var(--duration-fast) var(--ease-apple)}.nav-icon-btn:hover{color:var(--text-primary)}.footer{background-color:var(--bg-secondary);border-top:1px solid var(--border-light);margin-top:80px;padding:80px 0 40px}.footer-container{flex-wrap:wrap;justify-content:space-between;gap:48px;margin-bottom:64px;display:flex}.footer-brand h3{margin-bottom:8px;font-size:1.25rem}.footer-brand p{color:var(--text-secondary);font-size:.9rem}.footer-links-grid{gap:64px;display:flex}.footer-column h4{margin-bottom:16px;font-size:.875rem;font-weight:600}.footer-column a{color:var(--text-secondary);transition:color var(--duration-fast) var(--ease-apple);margin-bottom:12px;font-size:.875rem;display:block}.footer-column a:hover{color:var(--text-primary)}.footer-bottom{border-top:1px solid var(--border-light);color:var(--text-secondary);text-align:center;padding-top:24px;font-size:.8rem}.btn{transition:all var(--duration-fast) var(--ease-apple);border-radius:9999px;justify-content:center;align-items:center;padding:12px 24px;font-size:.95rem;font-weight:500;display:inline-flex}.btn-primary{background-color:var(--text-primary);color:var(--bg-primary)}.btn-primary:hover{box-shadow:var(--shadow-md);background-color:#000;transform:scale(1.02)}.btn-outline{color:var(--text-primary);border:1px solid var(--border-light);background-color:#0000}.btn-outline:hover{border-color:var(--text-primary)}.book-card{group:true;flex-direction:column;text-decoration:none;display:flex}.book-cover-wrapper{box-shadow:var(--shadow-md);background-color:var(--bg-secondary);aspect-ratio:3/4;transition:transform var(--duration-default) var(--ease-apple), box-shadow var(--duration-default) var(--ease-apple);border-radius:12px;margin-bottom:20px;position:relative;overflow:hidden}.book-cover-img{object-fit:cover;width:100%;height:100%;transition:transform .6s var(--ease-apple)}.book-card:hover .book-cover-wrapper{box-shadow:var(--shadow-lg);transform:translateY(-8px)}.book-card:hover .book-cover-img{transform:scale(1.03)}.book-info{flex-direction:column;gap:4px;display:flex}.book-title{color:var(--text-primary);margin:0;font-size:1.05rem;font-weight:600}.book-author{color:var(--text-secondary);margin:0;font-size:.875rem}.book-price{color:var(--text-primary);margin-top:4px;font-size:.95rem;font-weight:500}.hero-section{text-align:center;padding:120px 0 80px}.hero-title{letter-spacing:-.04em;margin-bottom:24px;font-size:clamp(3rem,8vw,6rem);line-height:1.05}.hero-subtitle{color:var(--text-secondary);max-width:600px;margin:0 auto 40px;font-size:clamp(1.25rem,3vw,1.5rem)}.featured-section{margin:60px auto 120px}.featured-grid{background-color:var(--bg-secondary);border-radius:24px;grid-template-columns:1fr;align-items:center;gap:60px;padding:40px;display:grid}@media (width>=768px){.featured-grid{grid-template-columns:1fr 1fr;padding:80px}}.featured-image-wrapper{box-shadow:var(--shadow-lg);aspect-ratio:3/4;border-radius:16px;position:relative;overflow:hidden}.featured-image{object-fit:cover;width:100%;height:100%}.featured-label{text-transform:uppercase;letter-spacing:.05em;color:var(--accent);margin-bottom:16px;font-size:.8rem;font-weight:600;display:inline-block}.featured-title{margin-bottom:20px;font-size:clamp(2rem,4vw,3rem);line-height:1.1}.featured-desc{color:var(--text-secondary);margin-bottom:32px;font-size:1.1rem;line-height:1.6}.featured-price{margin-bottom:32px;font-size:1.5rem;font-weight:500}.collection-section{margin-bottom:80px}.section-header{justify-content:space-between;align-items:flex-end;margin-bottom:40px;display:flex}.section-header h2{font-size:2rem}.view-all-link{color:var(--accent);font-weight:500}.book-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:40px;display:grid}.product-page{padding-top:80px;padding-bottom:120px}.product-grid{grid-template-columns:1fr;gap:60px;display:grid}@media (width>=900px){.product-grid{grid-template-columns:1fr 1fr;align-items:flex-start}}.product-image-container{box-shadow:var(--shadow-lg);aspect-ratio:3/4;border-radius:20px;overflow:hidden}.product-cover{object-fit:cover;width:100%;height:100%}.product-info{flex-direction:column;display:flex}.product-title{margin-bottom:8px;font-size:clamp(2.5rem,5vw,4rem);line-height:1.1}.product-author{color:var(--text-secondary);margin-bottom:24px;font-size:1.25rem}.product-price{margin-bottom:32px;font-size:2rem;font-weight:500}.product-divider{background-color:var(--border-light);height:1px;margin-bottom:32px}.product-desc{color:var(--text-secondary);margin-bottom:40px;font-size:1.1rem;line-height:1.7}.product-meta{gap:40px;margin-bottom:48px;display:flex}.meta-item{flex-direction:column;gap:4px;display:flex}.meta-label{text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary);font-size:.8rem;font-weight:600}.meta-value{font-size:1rem;font-weight:500}.buy-btn{width:100%;padding:16px 32px;font-size:1.1rem}.checkout-page{padding-top:100px;padding-bottom:100px}.checkout-container{grid-template-columns:1fr 1fr;align-items:start;gap:64px;display:grid}@media (width<=768px){.checkout-container{grid-template-columns:1fr;gap:40px}}.checkout-summary{background:var(--bg-secondary);border-radius:20px;padding:40px}.checkout-summary img{width:100%;max-width:200px;box-shadow:var(--shadow-md);border-radius:12px;margin-bottom:24px}.summary-item{border-bottom:1px solid var(--border-light);justify-content:space-between;margin-bottom:16px;padding-bottom:16px;display:flex}.summary-total{justify-content:space-between;margin-top:24px;font-size:1.5rem;font-weight:700;display:flex}.checkout-form{flex-direction:column;gap:24px;display:flex}.form-group{flex-direction:column;gap:8px;display:flex}.form-group label{color:var(--text-secondary);font-weight:500}.form-group input{border:1px solid var(--border-light);transition:border-color var(--duration-fast);border-radius:12px;padding:16px;font-family:inherit;font-size:1rem}.form-group input:focus{border-color:var(--accent);outline:none}.error-msg{color:#ff3b30;font-size:.9rem}.app-container{flex-direction:column;min-height:100vh;display:flex}.main-content{flex:1;padding-top:64px}