:root{--color-bg: #f6f5f2;--color-surface: #ffffff;--color-surface-alt: #f0ede6;--color-cover-placeholder: #e9e5dd;--color-text-primary: #2c2a26;--color-text-secondary: #8a867e;--color-text-tertiary: #b3aca0;--color-text-inverse: #ffffff;--color-border: #e6e3dd;--color-border-hover: #cfc9bd;--color-border-focus: #6b4f3a;--color-accent-50: #f5f0eb;--color-accent-100: #e0d4c6;--color-accent-300: #8a6f57;--color-accent-500: #6b4f3a;--color-accent-600: #5a4130;--color-accent-700: #4a3425;--color-accent-900: #3a2818;--color-accent-ring: rgba(107, 79, 58, .12);--color-danger-50: #fbe9e7;--color-danger-500: #c0392b;--color-danger-600: #a93226;--color-danger-700: #8b2820;--color-success-500: #5a9a6a;--color-success-50: #eaf5ed;--color-warning-500: #d18a3a;--color-warning-50: #fbf0e3;--color-info-500: #4a7fbd;--color-info-50: #eaf2fb;--color-neutral-500: #9a958c;--color-neutral-50: #f2f1ee;--shadow-xs: 0 1px 2px rgba(0, 0, 0, .04);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .08);--shadow-md: 0 4px 12px rgba(0, 0, 0, .1);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .12);--shadow-xl: 0 16px 48px rgba(0, 0, 0, .16);--overlay-light: rgba(0, 0, 0, .4);--overlay-soft: rgba(0, 0, 0, .25);--space-0: 0;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--space-8: 32px;--space-10: 40px;--space-12: 48px;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-full: 999px;--text-xs: .75rem;--text-sm: .8125rem;--text-base: .875rem;--text-md: .9375rem;--text-lg: 1.125rem;--text-xl: 1.25rem;--text-2xl: 1.375rem;--font-regular: 400;--font-medium: 500;--font-semibold: 600;--leading-tight: 1.3;--leading-snug: 1.4;--leading-normal: 1.6;--leading-relaxed: 1.75;--transition-fast: .15s ease;--transition-normal: .3s ease;--transition-slow: .5s ease;--transition-spring: .4s cubic-bezier(.34, 1.56, .64, 1);--bg: var(--color-bg);--card: var(--color-surface);--border: var(--color-border);--text: var(--color-text-primary);--muted: var(--color-text-secondary);--accent: var(--color-accent-500);--accent-light: var(--color-accent-300);--danger: var(--color-danger-500)}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;background:var(--color-bg);color:var(--color-text-primary);-webkit-tap-highlight-color:transparent}.app-header{background:var(--color-surface);border-bottom:1px solid var(--color-border);padding:var(--space-4) var(--space-6);display:flex;align-items:center;justify-content:space-between;gap:var(--space-4);position:sticky;top:0;z-index:10}.app-header h1{font-size:var(--text-xl);margin:0;letter-spacing:1px}.app-header .actions{display:flex;gap:var(--space-3);align-items:center}.app-root{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column}.container{max-width:1200px;margin:0 auto;padding:var(--space-5) var(--space-6);flex:1;width:100%}.toolbar{display:flex;flex-wrap:wrap;gap:var(--space-3);align-items:center;margin-bottom:var(--space-5)}.tabs{display:flex;gap:var(--space-1);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-1)}.tab{border:none;background:transparent;padding:var(--space-2) var(--space-4);border-radius:var(--radius-sm);cursor:pointer;font-size:var(--text-base);color:var(--color-text-secondary);transition:background-color var(--transition-fast),color var(--transition-fast)}.tab:hover:not(.active){background:var(--color-surface-alt);color:var(--color-text-primary)}.tab.active{background:var(--color-accent-500);color:var(--color-text-inverse);font-weight:var(--font-medium)}.chip{border:1px solid var(--color-border);background:var(--color-surface);padding:var(--space-1) var(--space-3);border-radius:var(--radius-full);cursor:pointer;font-size:var(--text-sm);color:var(--color-text-secondary);transition:background-color var(--transition-fast),border-color var(--transition-fast),color var(--transition-fast)}.chip:hover:not(.active){border-color:var(--color-border-hover);background:var(--color-surface-alt);color:var(--color-text-primary)}.chip.active{background:var(--color-accent-300);color:var(--color-text-inverse);border-color:var(--color-accent-300)}.search-input{flex:1;min-width:200px;padding:var(--space-2) var(--space-3);border:1px solid var(--color-border);border-radius:var(--radius-md);font-size:var(--text-base);background:var(--color-surface);transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.search-input:hover{border-color:var(--color-border-hover)}.search-input:focus{outline:none;border-color:var(--color-accent-500);box-shadow:0 0 0 3px var(--color-accent-ring)}.search-input::placeholder{color:var(--color-text-tertiary)}.btn{border:none;padding:var(--space-2) var(--space-4);border-radius:var(--radius-md);cursor:pointer;font-size:var(--text-base);background:var(--color-accent-500);color:var(--color-text-inverse);transition:background-color var(--transition-fast),border-color var(--transition-fast),box-shadow var(--transition-fast),transform var(--transition-fast)}.btn:hover:not(:disabled){background:var(--color-accent-600);box-shadow:var(--shadow-sm)}.btn:active:not(:disabled){background:var(--color-accent-700);transform:scale(.97)}.btn.secondary{background:var(--color-surface);color:var(--color-text-primary);border:1px solid var(--color-border)}.btn.secondary:hover:not(:disabled){border-color:var(--color-border-hover);background:var(--color-surface-alt)}.btn.secondary:active:not(:disabled){transform:scale(.97)}.btn.danger{background:transparent;color:var(--color-danger-500);border:1px solid var(--color-danger-500)}.btn.danger:hover:not(:disabled){background:var(--color-danger-50)}.btn.danger:active:not(:disabled){background:var(--color-danger-50);transform:scale(.97)}.btn.danger-solid{background:var(--color-danger-500);color:var(--color-text-inverse);border:1px solid var(--color-danger-500)}.btn.danger-solid:hover:not(:disabled){background:var(--color-danger-600);box-shadow:var(--shadow-sm)}.btn.danger-solid:active:not(:disabled){background:var(--color-danger-700);transform:scale(.97)}.btn:disabled{opacity:.5;cursor:not-allowed}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-3)}@media (min-width: 480px){.grid{grid-template-columns:repeat(4,1fr)}}@media (min-width: 640px){.grid{grid-template-columns:repeat(5,1fr);gap:var(--space-4)}}@media (min-width: 900px){.grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:var(--space-5)}}.book-card{cursor:pointer;transition:transform var(--transition-normal);user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}.book-card:hover{transform:translateY(-4px)}.book-cover{position:relative;width:100%;aspect-ratio:3 / 4;border-radius:var(--radius-md);overflow:hidden;background:var(--color-cover-placeholder);box-shadow:var(--shadow-xs);display:flex;align-items:center;justify-content:center;transition:box-shadow var(--transition-normal)}.book-card:hover .book-cover{box-shadow:var(--shadow-md)}.book-cover img{width:100%;height:100%;object-fit:cover;-webkit-user-drag:none}.book-cover .placeholder{color:var(--color-text-tertiary);font-size:var(--text-sm);text-align:center;padding:var(--space-3);word-break:break-all}.book-card .title{margin-top:var(--space-2);font-size:var(--text-base);font-weight:var(--font-semibold);line-height:var(--leading-snug);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.book-card .author{margin-top:2px;font-size:var(--text-xs);color:var(--color-text-secondary)}.empty{text-align:center;color:var(--color-text-secondary);padding:var(--space-12) 0;font-size:var(--text-md)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--overlay-light);display:flex;align-items:center;justify-content:center;z-index:100;padding:var(--space-5);animation:overlayIn var(--transition-normal)}.modal{background:var(--color-surface);border-radius:var(--radius-lg);max-width:680px;width:100%;max-height:90vh;overflow:auto;padding:var(--space-6);position:relative;box-shadow:var(--shadow-lg);scrollbar-width:none;-ms-overflow-style:none;animation:modalIn var(--transition-spring)}.modal::-webkit-scrollbar{display:none}.modal-overlay.closing{animation:overlayOut var(--transition-fast) forwards}.modal-overlay.closing .modal,.modal-overlay.closing .confirm-dialog{animation:modalOut var(--transition-fast) forwards}.modal-close{position:absolute;top:var(--space-3);right:var(--space-3);width:32px;height:32px;display:flex;align-items:center;justify-content:center;border:none;background:var(--color-surface-alt);border-radius:var(--radius-full);font-size:var(--text-lg);line-height:1;cursor:pointer;color:var(--color-text-secondary);transition:background var(--transition-fast),color var(--transition-fast),transform var(--transition-fast)}.modal-close:hover{background:var(--color-accent-100);color:var(--color-text-primary);transform:rotate(90deg)}.detail-body{display:flex;gap:var(--space-5)}.detail-cover{width:160px;flex-shrink:0}.detail-cover img{width:100%;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}.detail-cover-placeholder{width:100%;aspect-ratio:3 / 4;border-radius:var(--radius-lg);background:var(--color-cover-placeholder);color:var(--color-text-tertiary);font-size:var(--text-sm);display:flex;align-items:center;justify-content:center;text-align:center;padding:var(--space-3);word-break:break-all}.detail-info{flex:1;min-width:0}.detail-header{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--space-3);padding-right:calc(var(--space-6) + var(--space-1));margin-bottom:var(--space-4)}.detail-header h2{margin:0;font-size:var(--text-2xl);line-height:var(--leading-tight)}.badges{display:flex;gap:var(--space-2);flex-shrink:0}.badge{color:var(--color-text-inverse);font-size:var(--text-xs);padding:var(--space-1) var(--space-3);border-radius:var(--radius-full);white-space:nowrap}.badge.rating{background:var(--color-warning-500)}.meta-list{list-style:none;padding:0;margin:0;font-size:var(--text-sm)}.meta-list li{display:flex;gap:var(--space-4);padding:var(--space-2) 0;border-bottom:1px dashed var(--color-border)}.meta-list li:last-child{border-bottom:none}.meta-key{color:var(--color-text-secondary);flex-shrink:0;min-width:64px}.meta-value{color:var(--color-text-primary);word-break:break-all}.meta-value a{color:var(--color-accent-500);text-decoration:none}.meta-value a:hover{text-decoration:underline}.intro-block{margin-top:var(--space-5);border-top:1px solid var(--color-border);padding-top:var(--space-4)}.intro-title{font-size:var(--text-base);font-weight:var(--font-semibold);margin-bottom:var(--space-2)}.intro{font-size:var(--text-base);line-height:var(--leading-relaxed);color:var(--color-text-primary);white-space:pre-wrap}.detail-actions{margin-top:var(--space-5);border-top:1px solid 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var(--space-4);font-size:var(--text-md)}.add-tabs{width:fit-content;margin:0 auto var(--space-5)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-3)}.form-grid .full{grid-column:1 / -1}.form-field label{display:block;font-size:var(--text-sm);color:var(--color-text-secondary);margin-bottom:var(--space-1)}.form-field input,.form-field textarea{width:100%;padding:var(--space-2) var(--space-3);border:1px solid var(--color-border);border-radius:var(--radius-md);font-size:var(--text-base);font-family:inherit;background:var(--color-surface);transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.form-field input:hover,.form-field textarea:hover{border-color:var(--color-border-hover)}.form-field input:focus,.form-field textarea:focus{outline:none;border-color:var(--color-accent-500);box-shadow:0 0 0 3px var(--color-accent-ring)}.form-field input::placeholder,.form-field textarea::placeholder{color:var(--color-text-tertiary)}.form-field textarea{min-height:80px;resize:vertical}select{appearance:none;-webkit-appearance:none;-moz-appearance:none;background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-2) var(--space-8) var(--space-2) var(--space-3);font-size:var(--text-base);font-family:inherit;color:var(--color-text-primary);cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%238a867e' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right var(--space-3) center;background-size:12px 8px;transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}select:hover{border-color:var(--color-border-hover)}select:focus{outline:none;border-color:var(--color-accent-500);box-shadow:0 0 0 3px var(--color-accent-ring)}.form-field select{width:100%}.candidates{display:flex;flex-direction:column;gap:var(--space-3)}.candidate{display:flex;gap:var(--space-4);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-3);align-items:center}.candidate img{width:56px;height:80px;object-fit:cover;border-radius:var(--radius-sm)}.candidate .info{flex:1;min-width:0}.candidate .info .title{font-size:var(--text-md);font-weight:var(--font-semibold)}.candidate .info .sub{font-size:var(--text-xs);color:var(--color-text-secondary);margin-top:var(--space-1)}.error{color:var(--color-danger-500);font-size:var(--text-sm);margin-top:var(--space-2)}.context-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:200}.context-menu{position:fixed;z-index:201;min-width:140px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:var(--space-2);display:flex;flex-direction:column;transform-origin:top center;animation:menuIn var(--transition-fast)}.context-item{border:none;background:transparent;text-align:left;padding:var(--space-2) var(--space-3);border-radius:var(--radius-sm);cursor:pointer;font-size:var(--text-base);color:var(--color-text-primary);transition:background-color var(--transition-fast),color var(--transition-fast)}.context-item:hover{background:var(--color-surface-alt)}.context-item.danger{color:var(--color-danger-500)}.context-item.danger:hover{background:var(--color-danger-50)}.batch-nav{position:fixed;left:0;right:0;bottom:0;z-index:20;background:var(--color-surface);border-top:1px solid var(--color-border);box-shadow:0 -6px 20px #00000014;padding:var(--space-3) var(--space-4);padding-bottom:calc(var(--space-3) + 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var(--space-4);border-radius:var(--radius-md);cursor:pointer;font-size:var(--text-base);color:var(--color-text-primary);transition:border-color var(--transition-fast)}.batch-panel-item:hover{border-color:var(--color-accent-500)}.container.has-batch-nav{padding-bottom:calc(120px + env(safe-area-inset-bottom))}.dropdown-wrap{position:relative;display:inline-block}.dropdown-wrap.block{display:block}.dropdown-btn{display:inline-flex;align-items:center;justify-content:space-between;gap:var(--space-1)}.dropdown-wrap.block .dropdown-btn{width:100%}.caret{font-size:var(--text-xs)}.dropdown-menu{position:absolute;top:calc(100% + var(--space-1));left:0;z-index:210;min-width:120px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:var(--space-2);display:flex;flex-direction:column;transform-origin:top center;animation:menuIn var(--transition-fast)}.dropdown-menu button{border:none;background:transparent;text-align:left;padding:var(--space-2) var(--space-3);border-radius:var(--radius-sm);cursor:pointer;font-size:var(--text-base);color:var(--color-text-primary);transition:background-color var(--transition-fast)}.dropdown-menu button:hover{background:var(--color-surface-alt)}.dropdown-menu button.active{background:var(--color-surface-alt);font-weight:var(--font-medium)}.pin-badge{position:absolute;top:var(--space-2);left:var(--space-2);background:var(--color-accent-500);color:var(--color-text-inverse);font-size:var(--text-xs);padding:2px var(--space-2);border-radius:var(--radius-full)}.card-check{position:absolute;top:var(--space-2);right:var(--space-2);width:18px;height:18px;cursor:pointer;accent-color:var(--color-accent-500)}.book-card.selected .book-cover{outline:3px solid var(--color-accent-500);outline-offset:-3px}.confirm-dialog{background:var(--color-surface);border-radius:var(--radius-lg);padding:var(--space-6);max-width:360px;width:100%;box-shadow:var(--shadow-lg);animation:modalIn var(--transition-spring)}.confirm-message{font-size:var(--text-base);line-height:var(--leading-normal);margin-bottom:var(--space-5)}.confirm-actions{display:flex;justify-content:flex-end;gap:var(--space-3)}.btn:focus-visible,.tab:focus-visible,.chip:focus-visible,.modal-close:focus-visible,.context-item:focus-visible,.dropdown-menu button:focus-visible,.tag .remove:focus-visible,.card-check:focus-visible{outline:2px solid var(--color-accent-500);outline-offset:2px}@keyframes overlayIn{0%{opacity:0}to{opacity:1}}@keyframes overlayOut{0%{opacity:1}to{opacity:0}}@keyframes modalIn{0%{opacity:0;transform:scale(.95) translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}@keyframes modalOut{0%{opacity:1;transform:scale(1) translateY(0)}to{opacity:0;transform:scale(.97) translateY(5px)}}@keyframes modalInMobile{0%{transform:translateY(100%)}to{transform:translateY(0)}}@keyframes modalOutMobile{0%{transform:translateY(0)}to{transform:translateY(100%)}}@keyframes menuIn{0%{opacity:0;transform:scale(.95) translateY(-4px)}to{opacity:1;transform:scale(1) translateY(0)}}@media (max-width: 639px){.container{padding:var(--space-4) var(--space-3)}.app-header{padding:var(--space-3) var(--space-4)}.app-header h1{font-size:var(--text-lg)}.btn,.tab,.chip,.context-item,.dropdown-menu button{min-height:44px}.modal-close{width:40px;height:40px}.search-input,.form-field input,.form-field select,.tag-input{min-height:40px}.toolbar{gap:var(--space-2)}.tabs{max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;flex-wrap:nowrap;scrollbar-width:none}.tabs::-webkit-scrollbar{display:none}.tabs .tab{flex-shrink:0;white-space:nowrap}.search-input{flex-basis:100%}.book-card .title{font-size:var(--text-sm)}.book-card .author{font-size:var(--text-xs)}.modal-overlay{padding:0}.modal{max-width:none;width:100%;height:100dvh;max-height:none;border-radius:0;padding:var(--space-5) var(--space-4);padding-bottom:calc(var(--space-5) + env(safe-area-inset-bottom));animation:modalInMobile var(--transition-normal)}.modal-overlay.closing .modal{animation:modalOutMobile var(--transition-fast) forwards}.detail-body{flex-direction:column;gap:var(--space-4)}.detail-cover{width:140px;margin:0 auto}.detail-header{flex-direction:column;gap:var(--space-2);padding-right:0}.badges{flex-wrap:wrap}.meta-key{min-width:52px}.detail-footer{flex-wrap:wrap}.confirm-text{flex-basis:100%;margin-right:0}.form-grid{grid-template-columns:1fr}.field-row{flex-direction:column;align-items:stretch}.field-row label{min-width:0}.batch-nav{padding:var(--space-2) var(--space-3);padding-bottom:calc(var(--space-2) + env(safe-area-inset-bottom))}.batch-nav-bar{gap:var(--space-2)}.container.has-batch-nav{padding-bottom:calc(110px + env(safe-area-inset-bottom))}.context-menu,.dropdown-menu{max-width:calc(100vw - var(--space-4));max-height:60vh;overflow-y:auto}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}.book-card:hover,.modal-close:hover{transform:none}}