:root{--primary:#F06A22;--primary-hover:#FF7A33;--primary-dark:#FF922B;--primary-light:#2A1A12;--primary-border:#5C3418;--primary-glow:rgba(240,106,34,0.28);--secondary:#E8A317;--secondary-light:#2A2210;--accent-olive:#4ADE80;--accent-olive-light:#14241A;--accent-berry:#F87171;--accent-berry-light:#2A1414;--bg-app:#100E0C;--bg-surface:#1A1613;--bg-subtle:#241F1A;--bg-input:#1F1A16;--bg-highlight:#221C17;--text-primary:#F3EDE4;--text-secondary:#C9BDB0;--text-muted:#9A8E80;--text-light:#6F655A;--text-inverted:#FFFFFF;--border-light:#2C2621;--border-base:#3A322B;--border-dark:#524840;--shadow-xs:0 1px 2px rgba(0,0,0,0.35);--shadow-sm:0 2px 6px rgba(0,0,0,0.4);--shadow-md:0 6px 16px rgba(0,0,0,0.45);--shadow-lg:0 12px 28px -4px rgba(0,0,0,0.55),0 4px 10px rgba(0,0,0,0.35);--shadow-xl:0 22px 40px -8px rgba(0,0,0,0.65),0 10px 16px rgba(0,0,0,0.4);--shadow-primary:0 8px 24px -4px rgba(240,106,34,0.45);--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:22px;--radius-pill:9999px;--font-heading:"Outfit",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;--font-body:"Plus Jakarta Sans","Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;--transition-fast:150ms cubic-bezier(0.4,0,0.2,1);--transition-normal:250ms cubic-bezier(0.4,0,0.2,1);--transition-slow:350ms cubic-bezier(0.4,0,0.2,1);--header-height:64px;--sticky-cart-height:0px;--safe-bottom:env(safe-area-inset-bottom,0px);--page-pad-x:1rem;--page-pad-y:1.5rem;color-scheme:dark}@media (min-width:768px){:root{--header-height:72px;--page-pad-x:1.25rem;--page-pad-y:2.5rem}}*,:after,:before{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%;color-scheme:dark}body{font-family:var(--font-body);background-color:var(--bg-app);background-image:radial-gradient(ellipse at top,rgba(240,106,34,.06) 0,transparent 55%),linear-gradient(180deg,#100E0C,#0C0A09);background-attachment:fixed;line-height:1.55;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh;overflow-x:hidden}body,h1,h2,h3,h4,h5,h6{color:var(--text-primary)}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);font-weight:700;line-height:1.25}h1{font-size:clamp(2rem,4vw,2.75rem);letter-spacing:-.02em}h2{font-size:clamp(1.5rem,3vw,2rem);letter-spacing:-.015em}h3{font-size:clamp(1.25rem,2.5vw,1.5rem)}h4{font-size:1.125rem}h4,h5{font-weight:600}h5{font-size:1rem}h6{font-size:.875rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em}p{color:var(--text-secondary)}a{color:inherit;text-decoration:none;transition:color var(--transition-fast)}img{max-width:100%;height:auto;display:block}button,input,select,textarea{font-family:inherit;font-size:inherit}button{cursor:pointer;border:none;background:none}.app-container{display:flex;flex-direction:column;min-height:100vh}.main-content{flex:1 1}.container{max-width:1240px}.container,.container-wide{width:100%;margin:0 auto;padding:0 var(--page-pad-x)}.container-wide{max-width:1400px}.container-narrow{width:100%;max-width:800px;margin:0 auto;padding:0 var(--page-pad-x)}.header-brand-icon{width:40px;height:40px;flex-shrink:0;border-radius:var(--radius-md);background:linear-gradient(135deg,var(--primary) 0,#C22500 100%);color:#FFFFFF;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-primary)}.header-brand-name{font-family:var(--font-heading);font-size:1.125rem;font-weight:800;color:var(--text-primary);display:block;line-height:1.1;white-space:nowrap}.header-tagline{display:block;font-size:.625rem;font-weight:600;color:var(--text-muted);letter-spacing:.04em;text-transform:uppercase;white-space:nowrap}@media (max-width:767px){.header-brand{gap:.375rem!important}.header-brand-icon{width:32px;height:32px}.header-brand-icon-svg{width:16px!important;height:16px!important}.header-brand-name{font-size:.875rem}.header-tagline{display:none}.desktop-nav{display:none!important}.mobile-menu-btn{display:flex!important}.header-desktop-auth{display:none!important}.header-bar{gap:.375rem!important}.header-cart-btn{width:40px!important;height:40px!important}.mobile-menu-btn{width:40px;height:40px}}@media (min-width:768px){.mobile-menu-btn{display:none!important}}body.mobile-nav-open{overflow:hidden;position:fixed;left:0;right:0;width:100%}body.mobile-nav-open .sticky-mobile-cart{display:none!important}.mobile-nav-backdrop{position:fixed;inset:0;z-index:10000;border:none;padding:0;margin:0;background:rgba(0,0,0,.65);cursor:pointer;-webkit-tap-highlight-color:transparent}.mobile-nav-panel{position:fixed;left:0;right:0;bottom:0;z-index:10001;background:var(--bg-surface);display:flex;flex-direction:column;overflow:hidden;box-shadow:0 -8px 30px rgba(28,25,23,.12);border-top:1px solid var(--border-base)}.mobile-nav-scroll{flex:1 1;overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior:contain;padding:1.25rem 1rem max(1.25rem,env(safe-area-inset-bottom));display:flex;flex-direction:column;gap:1.5rem;min-height:0}.mobile-nav-links{display:flex;flex-direction:column;gap:0}.mobile-nav-link{display:flex;align-items:center;justify-content:space-between;gap:.75rem;padding:.875rem .75rem;font-size:1.0625rem;font-weight:600;color:var(--text-primary);text-decoration:none;border-bottom:1px solid var(--border-light)}.mobile-nav-link--active{color:var(--primary)}.mobile-nav-footer{margin-top:auto;display:flex;flex-direction:column;gap:.75rem;padding-top:.5rem}.mobile-nav-user-card{padding:.875rem;background-color:var(--bg-subtle);border-radius:var(--radius-md)}.mobile-nav-user-email{font-size:.8125rem;color:var(--text-muted);word-break:break-word}.mobile-nav-admin-link{display:block;text-align:center;margin-top:.25rem;color:var(--text-muted);font-size:.8125rem;text-decoration:none}@media (max-width:767px){.hero-section{padding-top:1.25rem!important;padding-bottom:1.75rem!important}.hero-section h1{font-size:clamp(1.5rem,7.5vw,2rem)!important;margin-bottom:.75rem!important}.hero-section p{font-size:.9375rem!important;margin-bottom:1.25rem!important}.hero-decorative-card{display:none!important}.hero-image-wrap .surface-card{transform:none!important}.hero-cta-row{display:flex!important;flex-direction:column!important;gap:.625rem!important}.hero-cta-row>a{width:100%!important;min-width:0!important;flex:none!important}.hero-stats{grid-gap:.75rem!important;gap:.75rem!important;margin-top:1.25rem!important;padding-top:1rem!important;display:grid!important;grid-template-columns:repeat(3,minmax(0,1fr))!important}.hero-stats>div{text-align:center;min-width:0}.hero-stats>div>div:first-child{font-size:1rem!important}.catalog-section{padding:1.75rem 0 5.5rem!important}.catalog-heading h2{font-size:1.375rem!important}.catalog-heading p{font-size:.875rem!important}.surface-card-interactive:hover{transform:none}.books-grid{gap:.875rem}}@media (max-width:479px){:root{--page-pad-x:0.875rem}.books-grid{grid-template-columns:1fr}}.surface-card{background-color:var(--bg-surface);border:1px solid var(--border-light);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);transition:transform var(--transition-fast),box-shadow var(--transition-fast),border-color var(--transition-fast)}.surface-card:hover{box-shadow:var(--shadow-md);border-color:var(--border-base)}.surface-card-interactive:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--primary-border)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;font-family:var(--font-body);font-weight:600;font-size:.9375rem;padding:.6875rem 1.375rem;border-radius:var(--radius-md);transition:all var(--transition-fast);text-align:center;white-space:nowrap;-webkit-user-select:none;-moz-user-select:none;user-select:none;text-decoration:none;min-height:44px}@media (max-width:480px){.btn{white-space:normal;line-height:1.25}.btn-lg{padding:.75rem 1.25rem;font-size:1rem}}.btn:disabled{opacity:.55;cursor:not-allowed;transform:none!important}.btn-primary{background:linear-gradient(135deg,#F06A22,#D9480F);color:#FFFFFF;box-shadow:0 4px 14px rgba(240,106,34,.35)}.btn-primary:hover:not(:disabled){background:linear-gradient(135deg,#F06A22 0,var(--primary) 100%);box-shadow:var(--shadow-primary);transform:translateY(-1px)}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-secondary{background-color:var(--bg-surface);color:var(--text-primary);border:1px solid var(--border-base);box-shadow:var(--shadow-xs)}.btn-secondary:hover:not(:disabled){background-color:var(--bg-subtle);border-color:var(--border-dark);color:var(--text-primary)}.btn-outline-primary{background-color:transparent;color:var(--primary);border:1.5px solid var(--primary)}.btn-outline-primary:hover:not(:disabled){background-color:var(--primary-light)}.btn-ghost{background-color:transparent;color:var(--text-secondary)}.btn-ghost:hover:not(:disabled){background-color:var(--bg-subtle);color:var(--text-primary)}.btn-danger{background-color:var(--accent-berry);color:var(--text-inverted)}.btn-danger:hover:not(:disabled){background-color:#B02A37}.btn-sm{padding:.4375rem .875rem;font-size:.8125rem;border-radius:var(--radius-sm)}.btn-lg{padding:.875rem 1.75rem;font-size:1.0625rem;border-radius:var(--radius-lg)}.btn-full{width:100%}.btn-icon{padding:.5rem;border-radius:var(--radius-md);justify-content:center}.badge,.btn-icon{display:inline-flex;align-items:center}.badge{gap:.25rem;font-size:.75rem;font-weight:600;padding:.25rem .625rem;border-radius:var(--radius-pill);letter-spacing:.02em}.badge-primary{background-color:var(--primary-light);color:var(--primary-dark);border:1px solid var(--primary-border)}.badge-pdf{background-color:rgba(248,113,113,.12);color:#FCA5A5;border:1px solid rgba(248,113,113,.28);font-weight:700}.badge-success{background-color:var(--accent-olive-light);color:var(--accent-olive);border:1px solid rgba(74,222,128,.28)}.badge-neutral{background-color:var(--bg-subtle);color:var(--text-secondary);border:1px solid var(--border-light)}.badge-amber{background-color:var(--secondary-light);color:#FBBF24;border:1px solid rgba(232,163,23,.3)}.form-group{margin-bottom:1.25rem;display:flex;flex-direction:column;gap:.375rem}.form-label{font-size:.875rem;font-weight:600;color:var(--text-primary)}.form-label-optional{font-size:.8125rem;font-weight:400;color:var(--text-muted)}.form-input,.form-select,.form-textarea{width:100%;padding:.75rem .875rem;font-size:16px;color:var(--text-primary);background-color:var(--bg-input);border:1.5px solid var(--border-base);border-radius:var(--radius-md);outline:none;transition:border-color var(--transition-fast),box-shadow var(--transition-fast);min-height:48px;line-height:1.25}.form-input{padding-top:0;padding-bottom:0}.form-input,.form-select{height:48px;line-height:48px}.form-select{appearance:none;-webkit-appearance:none;-moz-appearance:none;min-height:48px;padding:0 2.75rem 0 1rem;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%239A8E80' stroke-width='2.25' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .875rem center;background-size:16px 16px;cursor:pointer}.form-select::-ms-expand{display:none}@media (min-width:768px){.form-input,.form-select,.form-textarea{font-size:.9375rem}}.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow)}.form-input::placeholder,.form-textarea::placeholder{color:var(--text-light)}.form-input:disabled,.form-select:disabled,.form-textarea:disabled{background-color:var(--bg-subtle);cursor:not-allowed}.form-textarea{resize:vertical;min-height:100px}.form-hint{font-size:.75rem;color:var(--text-muted)}.form-error-msg{font-size:.8125rem;color:var(--accent-berry);font-weight:500}.form-input-error{border-color:var(--accent-berry)!important}.books-grid{display:grid;grid-template-columns:1fr;grid-gap:1rem;gap:1rem}@media (min-width:480px){.books-grid{grid-template-columns:repeat(2,1fr);gap:1rem}}@media (min-width:900px){.books-grid{grid-template-columns:repeat(3,1fr);gap:1.25rem}}@media (min-width:1200px){.books-grid{grid-template-columns:repeat(4,1fr);gap:1.5rem}}.stack-sm{display:grid;grid-template-columns:1fr;grid-gap:1rem;gap:1rem}@media (min-width:640px){.stack-sm{grid-template-columns:1fr 1fr}}.hide-below-md{display:none!important}@media (min-width:768px){.hide-below-md{display:revert!important}.hide-above-md{display:none!important}}.page-section{padding:var(--page-pad-y) 0}.has-sticky-cart{--sticky-cart-height:calc(72px + var(--safe-bottom))}.has-sticky-cart .main-content{padding-bottom:var(--sticky-cart-height)}.has-sticky-cart .site-footer{padding-bottom:calc(2.5rem + var(--sticky-cart-height))}.skeleton{background:linear-gradient(90deg,#241F1A 25%,#2E2822 50%,#241F1A 75%);background-size:200% 100%;animation:skeleton-loading 1.5s infinite;border-radius:var(--radius-md)}@keyframes skeleton-loading{0%{background-position:200% 0}to{background-position:-200% 0}}@keyframes fadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}@keyframes slideUp{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}@keyframes popIn{0%{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}.animate-fade-in{animation:fadeIn .3s ease-out forwards}.animate-slide-up{animation:slideUp .35s cubic-bezier(.16,1,.3,1) forwards}.animate-pop-in{animation:popIn .2s cubic-bezier(.16,1,.3,1) forwards}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-app)}::-webkit-scrollbar-thumb{background:var(--border-dark);border-radius:var(--radius-pill)}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.sticky-mobile-cart{display:none}@media (max-width:768px){.sticky-mobile-cart{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:90;background-color:var(--bg-surface);border-top:1px solid var(--border-base);padding:.75rem 1rem calc(.75rem + env(safe-area-inset-bottom, 0px));box-shadow:0 -4px 16px rgba(0,0,0,.08);align-items:center;justify-content:space-between;gap:.75rem}}.category-scroll{margin-bottom:.875rem;overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch;overscroll-behavior-x:contain;scrollbar-width:none;padding-bottom:.35rem;margin-left:calc(-1 * var(--page-pad-x));margin-right:calc(-1 * var(--page-pad-x));padding-left:var(--page-pad-x);padding-right:var(--page-pad-x)}.category-scroll::-webkit-scrollbar{display:none}.category-scroll-track{display:flex;gap:.5rem;width:max-content;padding-right:.5rem}.category-pill{flex-shrink:0;min-height:40px;padding:.5rem .95rem;border-radius:var(--radius-pill);font-size:.8125rem;font-weight:600;white-space:nowrap;transition:all var(--transition-fast);cursor:pointer}.category-pill,.tag-chip{-webkit-tap-highlight-color:transparent}.tag-chip{min-height:32px;display:inline-flex;align-items:center}.filter-meta-row{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:.75rem;padding-top:.5rem}@media (max-width:640px){.filter-search-sort{grid-template-columns:1fr!important;gap:.75rem!important}.filter-sort-wrap{width:100%}.filter-sort-wrap .form-select{width:100%;min-width:0!important}.filter-meta-row{flex-direction:column;align-items:flex-start}.book-card-body{padding:.875rem!important}.book-card-title{font-size:.9375rem!important}.book-card-cover-badges-right .badge{max-width:7.5rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.book-card-img:hover{transform:none!important}}