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640px){.toast-container{top:var(--spacing-md);right:var(--spacing-md);left:var(--spacing-md)}.toast{max-width:100%;min-width:auto}}#search-container{max-width:600px;width:100%;display:flex;justify-content:center;animation:appear .6s cubic-bezier(.4,0,.2,1);position:relative}@keyframes appear{0%{opacity:0;transform:translateY(-10px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}.search-wrapper{position:relative;display:flex;width:100%;flex:1}.search-icon{position:absolute;left:var(--spacing-lg);top:50%;transform:translateY(-50%);color:var(--text-muted);z-index:2;pointer-events:none;font-size:1.0625rem;transition:color .3s ease}#search-input{flex:1;padding:var(--spacing-md) var(--spacing-md) var(--spacing-md) 3rem;border:2px solid rgba(226,232,240,.6);border-radius:var(--radius-lg) 0 0 var(--radius-lg);font-size:.96875rem;font-weight:400;outline:none;transition:all .4s cubic-bezier(.4,0,.2,1);background:#ffffffe6;backdrop-filter:blur(16px) 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768px){.confirm-dialog{width:95%;max-height:95vh;padding:var(--spacing-lg)}.confirm-dialog-header h3{font-size:1.25rem}.confirm-dialog-content{gap:var(--spacing-sm)}.confirm-dialog-footer{flex-direction:column}.confirm-dialog-cancel-btn,.confirm-dialog-confirm-btn{width:100%;justify-content:center}}@media (max-width: 640px){.confirm-dialog{width:98%;padding:var(--spacing-md);max-height:98vh}.confirm-dialog-header{padding-bottom:var(--spacing-sm)}.confirm-dialog-header h3{font-size:1.125rem}.confirm-dialog-content p{font-size:.875rem}}.admin-main{flex:1;padding:var(--spacing-xl) var(--spacing-lg);padding-top:calc(var(--spacing-xl) + 80px);max-width:var(--max-width);margin:0 auto;width:100%}.admin-container{display:flex;flex-direction:column;gap:var(--spacing-2xl)}.admin-section{background:#fffffff2;backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border:1px solid 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8px);max-width:500px;margin:0;display:flex;align-items:center;gap:var(--spacing-md)}.item-error p:before{content:"";font-family:"Font Awesome 6 Free";font-weight:900;font-size:1.5rem;color:var(--error-color, #dc3545)}@media (max-width: 768px){.item-error{padding:var(--spacing-lg)}.item-error p{font-size:1rem;padding:var(--spacing-md)}.item-error p:before{font-size:1.25rem}}@media (max-width: 640px){.item-error{padding:var(--spacing-md);min-height:50vh}.item-error p{font-size:.9375rem;padding:var(--spacing-sm) var(--spacing-md);flex-direction:column;gap:var(--spacing-sm)}.item-error p:before{font-size:1.125rem}}.user-library-main{padding:var(--spacing-xl) var(--spacing-lg);padding-top:calc(var(--spacing-xl) + 80px);max-width:var(--max-width);margin:0 auto;width:100%}.user-library-header{text-align:center;margin-bottom:var(--spacing-2xl)}.user-library-header 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100%);color:#fff;border:none;border-radius:var(--radius-md);font-size:.875rem;font-weight:600;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:var(--shadow-sm);font-family:inherit}.create-collection-btn:hover{background:linear-gradient(135deg,#f97316,#ea580c);transform:translateY(-2px);box-shadow:var(--shadow-md)}.create-collection-btn:active{transform:translateY(0);box-shadow:var(--shadow-sm)}.create-collection-btn i{font-size:.875rem;margin-bottom:0}.collections-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:var(--spacing-xl)}.collection-card{background:linear-gradient(135deg,#fffffff2,#ffffffe6);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);padding:var(--spacing-xl);border:1px solid rgba(241,245,249,.6);border-radius:var(--radius-xl);box-shadow:0 4px 12px #0000000d,0 0 0 1px #fffc inset;transition:all .4s cubic-bezier(.4,0,.2,1);position:relative;animation:cardAppear .5s cubic-bezier(.4,0,.2,1) forwards;opacity:0;cursor:pointer;overflow:hidden;display:flex;flex-direction:column}.collection-card:before{content:"";position:absolute;top:0;left:0;width:4px;height:100%;background:linear-gradient(180deg,var(--primary-color) 0%,var(--primary-dark) 100%);opacity:0;transition:opacity .3s ease}.collection-card:hover{transform:translateY(-4px);box-shadow:0 12px 24px #0000001a,0 0 0 1px #9d9dbd33 inset;border-color:#9d9dbd4d}.collection-card:hover:before{opacity:1}.collection-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--spacing-lg);gap:var(--spacing-md)}.collection-actions{display:flex;gap:var(--spacing-xs);flex-shrink:0}.collection-header h3{font-size:1.375rem;font-weight:700;color:var(--text-color);margin:0;flex:1;line-height:1.3;letter-spacing:-.01em}.edit-collection-btn,.delete-collection-btn,.export-bibtex-btn,.save-collection-btn,.cancel-collection-btn{background:#ef444414;border:1px solid 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120px)}.not-found-content{padding:var(--spacing-xl)}.not-found-title{font-size:4rem}.not-found-subtitle{font-size:1.5rem}.not-found-description{font-size:1rem}.not-found-actions{flex-direction:column}.btn-primary,.btn-secondary{width:100%;justify-content:center}.links-grid{grid-template-columns:1fr}}@media (max-width: 640px){.not-found-page{padding-top:calc(var(--spacing-xl) + 130px)}.not-found-content{padding:var(--spacing-lg)}.not-found-icon{font-size:3.5rem}.not-found-title{font-size:3rem}.not-found-subtitle{font-size:1.25rem}.not-found-description{font-size:.9375rem}.not-found-links h3{font-size:1.25rem}}.app{min-height:100vh;display:flex;flex-direction:column}:root{--primary-color: rgb(157, 157, 189);--primary-dark: rgb(130, 130, 165);--primary-light: rgb(180, 180, 210);--background-color: #fafbfc;--surface-color: #ffffff;--text-color: #1a202c;--text-secondary: #4a5568;--text-muted: #718096;--border-color: #e2e8f0;--border-light: #f1f5f9;--hover-bg: #f7fafc;--shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, .06), 0 1px 2px 0 rgba(0, 0, 0, .04);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .08), 0 2px 4px -1px rgba(0, 0, 0, .04);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05), 0 0 0 1px rgba(0, 0, 0, .02);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .12), 0 10px 10px -5px rgba(0, 0, 0, .06), 0 0 0 1px rgba(0, 0, 0, .03);--shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, .15), 0 0 0 1px rgba(0, 0, 0, .05);--shadow-colored: 0 10px 25px -5px rgba(157, 157, 189, .2), 0 4px 6px -2px rgba(157, 157, 189, .1);--max-width: 1280px;--radius-sm: .375rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--spacing-xs: .375rem;--spacing-sm: .625rem;--spacing-md: .875rem;--spacing-lg: 1.25rem;--spacing-xl: 1.75rem;--spacing-2xl: 2.5rem}*{margin:0;padding:0;box-sizing:border-box}*:before,*:after{box-sizing:border-box}html{height:100%;margin:0;padding:0;scroll-behavior:smooth}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:radial-gradient(circle at 20% 50%,rgba(157,157,189,.08) 0%,transparent 50%),radial-gradient(circle at 80% 80%,rgba(249,115,22,.06) 0%,transparent 50%),linear-gradient(135deg,#fafbfc,#f1f5f9,#e8f0f5);background-attachment:fixed;color:var(--text-color);line-height:1.6;min-height:100vh;height:100%;margin:0;padding:0;display:flex;flex-direction:column;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;position:relative;overflow-x:hidden}body:before{content:"";position:fixed;top:0;left:0;right:0;bottom:0;background:repeating-linear-gradient(0deg,transparent,transparent 2px,rgba(255,255,255,.03) 2px,rgba(255,255,255,.03) 4px);pointer-events:none;z-index:0}#root{min-height:100vh;display:flex;flex-direction:column;position:relative;z-index:1}::selection{background-color:var(--primary-color);color:#fff}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--hover-bg);border-radius:var(--radius-sm)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:var(--radius-sm);transition:background .3s ease}::-webkit-scrollbar-thumb:hover{background:var(--primary-light)}*:focus-visible{outline:2px solid var(--primary-color);outline-offset:2px;border-radius:var(--radius-sm)}button,a,input,select{transition:all .3s cubic-bezier(.4,0,.2,1)}.empty-state{text-align:center;padding:var(--spacing-2xl);color:var(--text-muted)}.empty-state-icon{font-size:4rem;color:var(--primary-color);margin-bottom:var(--spacing-lg);opacity:.8}.empty-state-title{font-size:1.5rem;font-weight:600;color:var(--text-color);margin-bottom:var(--spacing-sm)}.empty-state-description{font-size:1rem;color:var(--text-secondary);max-width:500px;margin:0 auto}