.site-header{position:sticky;top:0;z-index:50;background:var(--color-bg-glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--color-border);transition:background-color var(--transition),border-color var(--transition)}.site-header__inner{display:flex;align-items:center;justify-content:space-between;height:68px}.site-header__brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--color-text);min-width:0;flex-shrink:1}.site-header__brand-icon{width:34px;height:34px;border-radius:var(--radius-sm);background:var(--color-badge-bg);color:var(--color-primary);display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:transform var(--transition)}.site-header__brand:hover .site-header__brand-icon{transform:rotate(-5deg) scale(1.05)}.site-header__brand-text{display:flex;flex-direction:column;min-width:0}.site-header__logo{font-family:var(--font-heading);font-size:21px;font-weight:400;letter-spacing:-.01em;color:var(--color-text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;line-height:1.1}.site-header__logo-sub{font-family:var(--font-body);font-size:11px;font-weight:500;text-transform:uppercase;letter-spacing:.06em;color:var(--color-text-muted);line-height:1;margin-top:2px;white-space:nowrap}.site-header__nav{display:flex;align-items:center;gap:16px}.site-header__desktop-links{display:flex;align-items:center;gap:8px}.site-header__nav-link{color:var(--color-text);font-weight:500;font-size:14px;padding:8px 12px;border-radius:var(--radius-sm);transition:color var(--transition),background-color var(--transition);display:inline-flex;align-items:center;gap:6px;text-decoration:none}.site-header__nav-link:hover{color:var(--color-primary);background-color:var(--color-secondary-bg)}.site-header__controls{display:flex;align-items:center;gap:8px;flex-shrink:0}.site-header__desktop-only{display:flex;align-items:center;gap:8px}.site-header__cart-btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px;background-color:var(--color-secondary-bg);border:1px solid var(--color-border);border-radius:var(--radius-full);padding:8px 16px;color:var(--color-text);font-size:13px;font-weight:600;text-decoration:none;transition:all var(--transition);min-height:40px}.site-header__cart-btn:hover{border-color:var(--color-primary);color:var(--color-primary);background-color:var(--color-bg-elevated)}.site-header__cart-label{display:inline}.site-header__cart-badge{background-color:var(--color-primary);color:var(--color-primary-foreground);font-size:11px;font-weight:700;min-width:18px;height:18px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;padding:0 5px;line-height:1}.site-header__menu-btn{display:none;align-items:center;justify-content:center;background:var(--color-secondary-bg);border:1px solid var(--color-border);border-radius:var(--radius-full);width:40px;height:40px;color:var(--color-text);cursor:pointer;transition:all var(--transition);flex-shrink:0}.site-header__menu-btn:hover{border-color:var(--color-primary);color:var(--color-primary)}.mobile-menu-backdrop{display:none;position:fixed;top:68px;left:0;right:0;bottom:0;background-color:#00000073;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);z-index:49}.mobile-menu-drawer{display:none;position:fixed;top:68px;left:0;right:0;max-height:calc(100vh - 68px);overflow-y:auto;background-color:var(--color-bg-elevated);border-bottom:1px solid var(--color-border);box-shadow:var(--shadow-lg);z-index:50;padding:20px 20px 32px;flex-direction:column;gap:16px;animation:slideDown .25s cubic-bezier(.16,1,.3,1)}@keyframes slideDown{0%{opacity:0;transform:translateY(-12px)}to{opacity:1;transform:translateY(0)}}.mobile-menu-section{display:flex;flex-direction:column;gap:6px}.mobile-menu-link{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-radius:var(--radius-md);color:var(--color-text);font-size:15px;font-weight:500;background-color:var(--color-bg);border:1px solid var(--color-border-subtle);text-decoration:none;transition:all var(--transition-fast)}.mobile-menu-link:hover,.mobile-menu-link:active{background-color:var(--color-badge-bg);color:var(--color-primary);border-color:var(--color-primary)}.mobile-menu-link__left{display:flex;align-items:center;gap:12px}.mobile-menu-divider{border:none;border-top:1px solid var(--color-border-subtle);margin:4px 0}.mobile-menu-actions{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background-color:var(--color-bg);border:1px solid var(--color-border-subtle);border-radius:var(--radius-md)}.mobile-menu-actions__label{font-size:13px;font-weight:600;color:var(--color-text-muted)}@media (max-width: 768px){.site-header__inner{height:62px}.site-header__desktop-links,.site-header__desktop-only{display:none!important}.site-header__menu-btn{display:flex}.site-header__logo{font-size:18px}.site-header__logo-sub{font-size:10px}.site-header__brand-icon{width:30px;height:30px}.site-header__cart-btn{padding:0;width:40px;height:40px;border-radius:var(--radius-full)}.site-header__cart-label{display:none}.site-header__cart-badge{position:absolute;top:-4px;right:-4px}.mobile-menu-backdrop.is-open{display:block}.mobile-menu-drawer.is-open{display:flex}}.floating-cart{position:fixed;bottom:24px;right:24px;z-index:45;display:flex;align-items:center;gap:12px;padding:10px 18px 10px 14px;background:var(--color-bg-elevated);border:1.5px solid var(--color-primary);border-radius:var(--radius-full);box-shadow:0 10px 30px -5px #00000040,0 0 15px -3px #b8504233;color:var(--color-text);text-decoration:none;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);cursor:pointer;transform:translateY(100px) scale(.9);opacity:0;pointer-events:none;transition:transform .35s cubic-bezier(.16,1,.3,1),opacity .3s ease,box-shadow .2s ease,background-color var(--transition)}.floating-cart.is-visible{transform:translateY(0) scale(1);opacity:1;pointer-events:auto}.floating-cart:hover{transform:translateY(-3px) scale(1.03);box-shadow:0 14px 36px -4px #0000004d,0 0 20px -2px #b8504259;background-color:var(--color-bg)}.floating-cart:active{transform:translateY(0) scale(.98)}.floating-cart.is-bumping{animation:floatingCartBump .45s cubic-bezier(.175,.885,.32,1.275)}@keyframes floatingCartBump{0%{transform:translateY(0) scale(1)}40%{transform:translateY(-8px) scale(1.12)}70%{transform:translateY(-2px) scale(.97)}to{transform:translateY(0) scale(1)}}.floating-cart__icon-box{position:relative;width:38px;height:38px;border-radius:50%;background-color:var(--color-primary);color:var(--color-primary-foreground);display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:transform .2s ease}.floating-cart:hover .floating-cart__icon-box{transform:rotate(-8deg)}.floating-cart__badge{position:absolute;top:-4px;right:-4px;background-color:var(--color-text);color:var(--color-bg);font-size:11px;font-weight:700;min-width:18px;height:18px;border-radius:999px;display:flex;align-items:center;justify-content:center;padding:0 4px;border:2px solid var(--color-bg-elevated);line-height:1}.floating-cart__info{display:flex;flex-direction:column;line-height:1.2}.floating-cart__title{font-size:13px;font-weight:600;color:var(--color-text)}.floating-cart__price{font-size:14px;font-weight:700;color:var(--color-primary);font-family:var(--font-heading)}.floating-cart__arrow{color:var(--color-primary);margin-left:2px;transition:transform .2s ease}.floating-cart:hover .floating-cart__arrow{transform:translate(3px)}@media (max-width: 600px){.floating-cart{bottom:18px;right:18px;padding:8px 14px 8px 10px;gap:10px}.floating-cart__icon-box{width:34px;height:34px}.floating-cart__title{font-size:12px}.floating-cart__price{font-size:13px}}.global-loading-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:9999;display:flex;align-items:center;justify-content:center;padding:20px;background-color:#0f172a8c;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);animation:overlayFadeIn .3s ease-out forwards}@keyframes overlayFadeIn{0%{opacity:0}to{opacity:1}}.global-loading-card{position:relative;width:100%;max-width:420px;background-color:var(--color-bg-elevated);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:0 20px 45px -10px #00000059,0 0 25px -5px #b8504233;padding:36px 28px;display:flex;flex-direction:column;align-items:center;text-align:center;gap:20px;animation:cardScaleUp .35s cubic-bezier(.16,1,.3,1) forwards}@keyframes cardScaleUp{0%{opacity:0;transform:scale(.92) translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}.global-loading-spinner-box{position:relative;width:76px;height:76px;display:flex;align-items:center;justify-content:center}.global-loading-spinner-ring{position:absolute;top:0;right:0;bottom:0;left:0;border-radius:50%;border:3px solid var(--color-border-subtle);border-top-color:var(--color-primary);border-right-color:var(--color-primary);animation:spinnerRotate 1.1s cubic-bezier(.68,-.55,.265,1.55) infinite}.global-loading-spinner-glow{position:absolute;top:4px;right:4px;bottom:4px;left:4px;border-radius:50%;background:radial-gradient(circle,rgba(184,80,66,.25) 0%,transparent 70%);animation:glowPulse 2s ease-in-out infinite alternate}.global-loading-spinner-icon{color:var(--color-primary);display:flex;align-items:center;justify-content:center;animation:iconPulse 2s ease-in-out infinite;z-index:1}@keyframes spinnerRotate{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes glowPulse{0%{opacity:.4;transform:scale(.85)}to{opacity:1;transform:scale(1.15)}}@keyframes iconPulse{0%,to{transform:scale(.95)}50%{transform:scale(1.1)}}.global-loading-content{display:flex;flex-direction:column;gap:8px;min-height:52px;justify-content:center}.global-loading-title{font-family:var(--font-heading);font-size:19px;font-weight:600;color:var(--color-text);margin:0;line-height:1.3}.global-loading-msg{font-size:14px;color:var(--color-text-muted);margin:0;line-height:1.5;transition:opacity .25s ease}.global-loading-badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--color-primary);background-color:var(--color-badge-bg);padding:4px 12px;border-radius:var(--radius-full);margin-top:4px;font-weight:500}.book-card{display:flex;flex-direction:column;background-color:var(--color-bg-elevated);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition);position:relative;text-decoration:none;color:var(--color-text)}.book-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:var(--color-primary)}.book-card__cover-wrapper{position:relative;width:100%;aspect-ratio:3 / 4.2;overflow:hidden;background-color:var(--color-bg-subtle);display:flex;align-items:center;justify-content:center}.book-card__cover{width:100%;height:100%;object-fit:cover;transition:transform var(--transition-slow)}.book-card:hover .book-card__cover{transform:scale(1.04)}.book-card__badge-overlay{position:absolute;top:12px;left:12px;z-index:2}.book-card__body{padding:20px;display:flex;flex-direction:column;flex:1;gap:10px}.book-card__author{font-size:13px;color:var(--color-text-muted);font-weight:500;margin:0}.book-card__title{font-family:var(--font-heading);font-size:18px;line-height:1.3;margin:0;color:var(--color-text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color var(--transition)}.book-card:hover .book-card__title{color:var(--color-primary)}.book-card__description{font-size:13px;line-height:1.5;color:var(--color-text-muted);margin:0;flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.book-card__footer{display:flex;align-items:center;justify-content:space-between;padding-top:14px;margin-top:auto;border-top:1px solid var(--color-border-subtle)}.book-card__price-tag{display:flex;flex-direction:column}.book-card__price-label{font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-muted)}.book-card__price{font-family:var(--font-heading);font-size:20px;font-weight:700;color:var(--color-text)}.book-card__action-btn{display:inline-flex;align-items:center;gap:6px;background-color:var(--color-primary);color:var(--color-primary-foreground);border:none;border-radius:var(--radius-full);padding:8px 14px;font-size:13px;font-weight:600;cursor:pointer;transition:all var(--transition)}.book-card__action-btn:hover{background-color:var(--color-primary-hover);transform:scale(1.04)}.book-card__action-btn.is-added{background-color:var(--color-success)}.auth-card{padding:36px 32px;position:relative;overflow:hidden}@media (max-width: 480px){.auth-card{padding:28px 20px}}.auth-tabs{display:grid;grid-template-columns:1fr 1fr;background-color:var(--color-bg-subtle);border:1px solid var(--color-border);border-radius:var(--radius-full);padding:4px;margin-bottom:24px;position:relative}.auth-tab-btn{border:none;background:transparent;padding:10px 16px;font-family:var(--font-body);font-size:14px;font-weight:600;color:var(--color-text-muted);border-radius:var(--radius-full);cursor:pointer;transition:all var(--transition-fast);text-align:center}.auth-tab-btn:hover:not(.active){color:var(--color-text)}.auth-tab-btn.active{background-color:var(--color-bg-elevated);color:var(--color-primary);box-shadow:var(--shadow-sm)}.input-icon-wrapper{position:relative;display:flex;align-items:center;width:100%}.input-icon-left{position:absolute;left:14px;color:var(--color-text-muted);pointer-events:none;display:flex;align-items:center;justify-content:center}.input-with-left-icon{padding-left:42px!important}.input-with-right-icon{padding-right:42px!important}.input-icon-right-btn{position:absolute;right:8px;top:50%;transform:translateY(-50%);background:transparent;border:none;color:var(--color-text-muted);cursor:pointer;padding:6px;border-radius:var(--radius-xs);display:flex;align-items:center;justify-content:center;transition:color var(--transition-fast)}.input-icon-right-btn:hover{color:var(--color-text)}.password-requirements{display:flex;flex-direction:column;gap:6px;margin-top:4px;margin-bottom:12px;font-size:12px}.requirement-item{display:flex;align-items:center;gap:6px;color:var(--color-text-muted);transition:color var(--transition-fast)}.requirement-item.met{color:var(--color-success);font-weight:500}.requirement-item.unmet{color:var(--color-danger)}.auth-alert{display:flex;align-items:flex-start;gap:10px;padding:12px 14px;border-radius:var(--radius-sm);font-size:13px;line-height:1.4;margin-bottom:18px}.auth-alert-error{background-color:#dc35451a;border:1px solid rgba(220,53,69,.25);color:var(--color-danger)}.auth-alert-success{background-color:#5690731f;border:1px solid rgba(86,144,115,.3);color:var(--color-success)}.auth-footer-switch{margin-top:20px;text-align:center;font-size:13px;color:var(--color-text-muted)}.auth-link-btn{background:transparent;border:none;padding:0;font-family:inherit;font-size:inherit;font-weight:600;color:var(--color-primary);cursor:pointer;text-decoration:underline;text-underline-offset:3px;margin-left:5px;transition:color var(--transition-fast)}.auth-link-btn:hover{color:var(--color-primary-hover)}:root{--font-heading: "DM Serif Display", Georgia, serif;--font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--radius-xs: 4px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 18px;--radius-full: 9999px;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .04), 0 1px 2px rgba(0, 0, 0, .02);--shadow-md: 0 8px 24px rgba(46, 56, 52, .08), 0 2px 6px rgba(46, 56, 52, .04);--shadow-lg: 0 16px 36px rgba(46, 56, 52, .12), 0 4px 12px rgba(46, 56, 52, .06);--shadow-book: 0 14px 28px rgba(0, 0, 0, .15), 0 10px 10px rgba(0, 0, 0, .08);--transition-fast: .15s ease;--transition: .25s cubic-bezier(.4, 0, .2, 1);--transition-slow: .4s cubic-bezier(.4, 0, .2, 1)}[data-theme=light]{--color-bg: hsl(40, 30%, 97%);--color-bg-subtle: hsl(40, 20%, 93%);--color-bg-elevated: hsl(40, 25%, 95%);--color-bg-glass: rgba(250, 248, 245, .85);--color-text: hsl(160, 10%, 20%);--color-text-muted: hsl(160, 8%, 45%);--color-text-light: hsl(160, 6%, 60%);--color-border: hsl(150, 15%, 85%);--color-border-subtle: hsl(150, 12%, 90%);--color-primary: hsl(150, 25%, 45%);--color-primary-hover: hsl(150, 28%, 38%);--color-primary-foreground: hsl(40, 30%, 97%);--color-accent: hsl(150, 25%, 45%);--color-accent-hover: hsl(150, 28%, 38%);--color-accent-contrast: hsl(40, 30%, 97%);--color-secondary-bg: hsl(40, 20%, 90%);--color-secondary-text: hsl(160, 10%, 25%);--color-badge-bg: hsl(150, 20%, 88%);--color-badge-text: hsl(150, 25%, 30%);--color-success: hsl(150, 45%, 40%);--color-danger: hsl(0, 75%, 55%)}[data-theme=dark]{--color-bg: hsl(160, 15%, 10%);--color-bg-subtle: hsl(160, 12%, 13%);--color-bg-elevated: hsl(160, 12%, 15%);--color-bg-glass: rgba(22, 31, 28, .85);--color-text: hsl(40, 25%, 95%);--color-text-muted: hsl(40, 15%, 65%);--color-text-light: hsl(40, 10%, 50%);--color-border: hsl(160, 10%, 20%);--color-border-subtle: hsl(160, 10%, 16%);--color-primary: hsl(150, 30%, 55%);--color-primary-hover: hsl(150, 32%, 62%);--color-primary-foreground: hsl(160, 15%, 10%);--color-accent: hsl(150, 30%, 55%);--color-accent-hover: hsl(150, 32%, 62%);--color-accent-contrast: hsl(160, 15%, 10%);--color-secondary-bg: hsl(160, 10%, 20%);--color-secondary-text: hsl(40, 25%, 95%);--color-badge-bg: hsl(150, 20%, 22%);--color-badge-text: hsl(150, 30%, 75%);--color-success: hsl(150, 40%, 60%);--color-danger: hsl(0, 65%, 55%)}*{box-sizing:border-box}html,body{margin:0;padding:0;overflow-x:hidden}body{font-family:var(--font-body);background-color:var(--color-bg);color:var(--color-text);transition:background-color var(--transition),color var(--transition);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{display:flex;flex-direction:column;min-height:100vh}a{color:var(--color-primary);text-decoration:none;transition:color var(--transition)}a:hover{color:var(--color-primary-hover)}.container{width:100%;max-width:1140px;margin:0 auto;padding:0 24px}.main-content{flex:1;padding:32px 0 72px}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);line-height:1.25;font-weight:400;color:var(--color-text);margin-top:0}.section-title{font-family:var(--font-heading);font-size:clamp(24px,4vw,32px);margin-bottom:8px;letter-spacing:-.01em}.section-subtitle{color:var(--color-text-muted);font-size:15px;line-height:1.5;margin-bottom:28px;max-width:680px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:var(--radius-full);padding:10px 20px;font-family:var(--font-body);font-size:14px;font-weight:600;cursor:pointer;text-decoration:none;transition:all var(--transition);min-height:40px;touch-action:manipulation}.btn-primary{background-color:var(--color-primary);color:var(--color-primary-foreground);box-shadow:0 2px 10px #56907340}.btn-primary:hover{background-color:var(--color-primary-hover);color:var(--color-primary-foreground);transform:translateY(-1px);box-shadow:0 4px 14px #56907359}.btn-secondary{background-color:var(--color-secondary-bg);color:var(--color-secondary-text);border:1px solid var(--color-border)}.btn-secondary:hover{border-color:var(--color-primary);color:var(--color-primary);background-color:var(--color-bg-elevated)}.btn-outline{background-color:transparent;color:var(--color-text);border:1px solid var(--color-border)}.btn-outline:hover{border-color:var(--color-primary);color:var(--color-primary);background-color:var(--color-bg-elevated)}.btn-sm{padding:6px 14px;font-size:13px;min-height:34px}.btn:disabled{opacity:.55;cursor:not-allowed;transform:none!important;box-shadow:none!important}.badge{display:inline-flex;align-items:center;gap:5px;padding:4px 12px;border-radius:var(--radius-full);font-size:12px;font-weight:600;letter-spacing:.02em;background-color:var(--color-badge-bg);color:var(--color-badge-text)}.card{background-color:var(--color-bg-elevated);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);transition:all var(--transition)}.form-field{display:flex;flex-direction:column;gap:6px;margin-bottom:18px;width:100%}.form-field label{font-size:13px;font-weight:600;color:var(--color-text-muted)}.form-field input,.form-field textarea,.form-field select{width:100%;box-sizing:border-box;padding:11px 16px;border-radius:var(--radius-sm);border:1px solid var(--color-border);background-color:var(--color-bg);color:var(--color-text);font-family:var(--font-body);font-size:15px;transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.form-field input:focus,.form-field textarea:focus,.form-field select:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #5690732e}.error-text{color:var(--color-danger);font-size:14px;margin:6px 0 0}@keyframes fadeUp{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.animate-fade-up{animation:fadeUp .4s ease-out forwards}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.animate-fade-in{animation:fadeIn .25s ease-out forwards}@media (max-width: 768px){.container{padding:0 16px}.main-content{padding:16px 0 48px}.form-field input,.form-field textarea,.form-field select{font-size:16px}}