:root{--bg:#f5f7f5;--panel:#fff;--accent:#00897b;--accent2:#00695c;--text:#2d2d2d;--dim:#64706c;--border:#d5ddd5;--soft:#eef6f3}
*{box-sizing:border-box}
body{margin:0;font-family:'Segoe UI',system-ui,sans-serif;background:var(--bg);color:var(--text);min-height:100vh}
button,input,select{font:inherit}
button{cursor:pointer}
button:disabled{cursor:default;opacity:.5}
a{color:var(--accent2)}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #007f73;outline-offset:3px}
[hidden]{display:none!important}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.topbar{min-height:42px;background:linear-gradient(90deg,#00897b,#00695c);display:flex;align-items:center;padding:5px 16px;gap:12px;z-index:100}
.topbar h1{margin:0;font-size:15px;color:#fff;font-weight:700}
.topbar a{color:#fff;text-decoration:none;font-size:13px;opacity:.85;padding:4px 12px;border:1px solid #ffffff4d;border-radius:4px;white-space:nowrap}
.topbar a:hover{opacity:1;background:#ffffff1a}
.topbar a.active{opacity:1;background:#fff3;border-color:#fff9}
.topbar .spacer{flex:1}
.stats-bar{background:var(--panel);border-bottom:1px solid var(--border);padding:14px 24px;display:flex;gap:30px;align-items:center}
.stat-item{display:flex;flex-direction:column;min-width:62px}
.stat-num{font-size:22px;font-weight:700;color:var(--accent2);white-space:nowrap}
.stat-label{font-size:10px;color:var(--dim);text-transform:uppercase;letter-spacing:.5px;margin-top:2px}
.library-note{margin-left:auto;color:var(--dim);font-size:13px}
.research-layout{display:grid;grid-template-columns:320px minmax(0,1fr);max-width:1540px;margin:0 auto;gap:22px;padding:24px}
.research-sidebar{background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:18px 14px;align-self:start;min-width:0}
.sidebar-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}
.sidebar-heading h2,.facet-section h2{font-size:14px;margin:0;font-weight:650}
.all-papers{display:flex;justify-content:space-between;gap:12px;align-items:center;width:100%;padding:10px 12px;background:white;border:1px solid var(--border);border-radius:5px;font-size:13px;font-weight:650;text-align:left;color:var(--text)}
.all-papers[aria-pressed=true]{background:var(--soft);color:var(--accent2);border-color:#8ebcaf}
.all-papers span,.category-count{font-variant-numeric:tabular-nums;color:var(--dim);font-size:11px;font-weight:400}
.filter-help{font-size:11px;line-height:1.6;color:var(--dim);margin:10px 2px}
.category-list{list-style:none;margin:0;padding:0}
.category-list .category-list{margin-left:9px;padding-left:9px;border-left:1px solid #e2eae5}
.category-node{margin:3px 0}
.category-row{display:flex;align-items:flex-start;gap:3px;border-radius:4px}
.category-row:hover{background:#f4f9f6}
.category-row.selected{background:var(--soft)}
.category-expand{width:23px;min-width:23px;min-height:32px;border:0;background:transparent;color:var(--accent2);font-size:11px;padding:7px 3px}
.category-expand[aria-expanded=true]{font-size:12px}
.category-spacer{width:23px;min-width:23px}
.category-option,.facet-option{display:flex;align-items:flex-start;gap:7px;padding:7px 3px;flex:1;min-width:0;cursor:pointer;font-size:12px;line-height:1.5}
.category-option input,.facet-option input{accent-color:var(--accent);width:14px;height:14px;margin:2px 0 0;flex-shrink:0}
.category-label{flex:1;min-width:0;overflow-wrap:anywhere}
.category-count{padding-top:1px;min-width:18px;text-align:right}
.category-list>.category-node>.category-row>.category-option{font-weight:600}
.category-list .category-list .category-option{font-weight:400}
.facet-section{margin-top:22px;padding-top:20px;border-top:1px solid var(--border)}
.facet-group{border-bottom:1px solid #e4eae6;padding:10px 0}
.facet-group summary{font-size:12px;font-weight:600;cursor:pointer;color:var(--text);padding:3px 0}
.facet-options{max-height:245px;overflow:auto;margin:8px 0 0;padding:0 4px;scrollbar-width:thin}
.facet-option{font-size:12px;padding:5px 0}
.facet-selected{font-size:11px;color:var(--accent2);font-weight:400}
.research-results{min-width:0}
.library-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;margin:0 0 18px}
.library-heading h2{margin:0;font-size:23px;letter-spacing:-.4px}
.library-heading p{margin:6px 0 0;color:var(--dim);font-size:13px;line-height:1.6}
.filter-bar{background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:16px}
.search-field{display:flex;flex-direction:column;gap:7px;font-size:12px;font-weight:600}
.search-field input{width:100%;min-width:0;border:1px solid #b8c9c0;border-radius:5px;padding:11px 12px;background:#fff;font-size:14px;color:var(--text)}
.filter-controls{display:flex;flex-wrap:wrap;gap:14px;align-items:end;margin-top:14px}
.year-range{display:flex;gap:8px;border:0;padding:0;margin:0;min-width:0}
.year-range legend{padding:0;margin:0 0 5px;font-size:11px;color:var(--dim)}
.year-range label{display:flex;gap:6px;align-items:center;font-size:11px;color:var(--dim)}
.year-range input{width:82px;min-width:0;border:1px solid var(--border);background:var(--bg);border-radius:4px;padding:7px 6px;font-size:12px;color:var(--text)}
.select-field{display:flex;flex-direction:column;gap:5px;font-size:11px;color:var(--dim)}
.select-field select{border:1px solid var(--border);border-radius:4px;padding:7px 8px;font-size:12px;color:var(--text);background:var(--bg)}
.clear-btn,.empty-reset,.page-button{border:1px solid var(--border);background:#fff;color:var(--accent2);border-radius:4px;padding:7px 10px;font-size:12px}
.clear-btn{margin-left:auto}
.clear-btn:hover,.empty-reset:hover,.page-button:hover:not(:disabled){background:var(--soft);border-color:#9abaad}
.active-filters{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.active-filters:empty{display:none}
.filter-chip{display:inline-flex;align-items:center;gap:7px;max-width:100%;background:#e8f4ed;border:1px solid #c3ddce;border-radius:16px;color:#1b5e50;padding:5px 9px;font-size:11px;text-align:left;line-height:1.5;overflow-wrap:anywhere}
.filter-chip:hover{border-color:var(--accent)}
.result-count{font-size:12px;color:var(--dim);margin:15px 1px 10px;line-height:1.6}
.paper-list{background:var(--panel);border:1px solid var(--border);border-radius:8px;overflow:hidden}
.paper-card{padding:18px 20px;border-bottom:1px solid var(--border)}
.paper-card:last-child{border-bottom:0}
.paper-card:hover{background:#fcfefd}
.paper-heading{display:flex;gap:12px;align-items:flex-start;justify-content:space-between}
.paper-title{font-size:15px;font-weight:600;line-height:1.5;margin:0;overflow-wrap:anywhere}
.paper-title a{text-decoration:none}
.paper-title a:hover{text-decoration:underline}
.paper-year{color:var(--accent2);font-size:13px;font-weight:600;padding-top:3px;white-space:nowrap}
.paper-authors{font-size:12px;color:#59645f;line-height:1.6;margin:7px 0;overflow-wrap:anywhere}
.publication-meta{display:flex;flex-wrap:wrap;gap:7px;align-items:center;font-size:11px;line-height:1.5;margin:6px 0 9px}
.paper-venue{font-weight:600;color:#365950}
.publication-status{background:#edf3f9;border:1px solid #d5e3ef;border-radius:3px;color:#345a78;padding:1px 6px}
.paper-priority{color:#5d6050}
.paper-chips{display:flex;gap:5px;flex-wrap:wrap;margin:10px 0}
.topic-chip{color:#47665c;border:1px solid #d9e6df;background:#f6f9f7;border-radius:4px;padding:3px 6px;font-size:10px;line-height:1.45;max-width:100%;overflow-wrap:anywhere}
.paper-links{display:flex;flex-wrap:wrap;gap:7px 14px;margin-top:10px;font-size:11px;line-height:1.7}
.paper-links a{text-underline-offset:3px}
.paper-details{margin-top:12px;color:var(--dim);font-size:11px}
.paper-details summary{cursor:pointer;width:fit-content;padding:3px 0;color:var(--accent2)}
.paper-details[open] summary{margin-bottom:8px}
.paper-metadata{display:grid;grid-template-columns:125px minmax(0,1fr);gap:7px 12px;font-size:11px;line-height:1.65;margin:8px 0;background:#f7faf8;border-radius:5px;padding:12px}
.paper-metadata dt{font-weight:600;color:#587065;margin:0}
.paper-metadata dd{margin:0;color:#44564d;overflow-wrap:anywhere;white-space:pre-wrap}
.metadata-list{margin:0;padding-left:16px}
.empty-state{padding:42px 22px;text-align:center;color:var(--dim);font-size:13px;line-height:1.8}
.empty-state h3{margin:0 0 7px;font-size:16px;color:var(--text)}
.empty-state p{margin:0 0 14px}
.load-error{color:#9c2929}
.pagination{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:6px;margin:20px 0}
.page-button{min-width:34px;min-height:34px}
.page-button[aria-current=page]{background:var(--accent2);border-color:var(--accent2);color:#fff}
.page-gap{padding:0 4px;color:var(--dim)}
.page-summary{width:100%;text-align:center;margin-top:5px;font-size:11px;color:var(--dim)}
.navigation-toggle,.drawer-close,.drawer-apply,.drawer-backdrop{display:none}
@media(max-width:1000px) and (min-width:851px){.research-layout{grid-template-columns:285px minmax(0,1fr);gap:16px;padding:18px}.library-note{max-width:330px}.paper-card{padding:16px}.clear-btn{margin-left:0}}
@media(max-width:850px){
  .topbar{overflow-x:auto;gap:8px;padding:6px 12px}.topbar h1{margin-right:4px}.topbar a{padding:5px 9px}
  .stats-bar{padding:12px 16px;gap:22px;flex-wrap:wrap}.stat-num{font-size:20px}.library-note{display:none}
  .research-layout{display:block;padding:18px 14px}.library-heading{align-items:flex-start;flex-wrap:wrap;margin-bottom:14px}.library-heading h2{font-size:22px}.library-heading p{font-size:12px}
  .navigation-toggle,.drawer-close,.drawer-apply{display:block;border:1px solid #a7c6b7;background:white;color:var(--accent2);border-radius:5px;padding:10px 12px;font-size:12px}
  .navigation-toggle{min-height:42px}.drawer-close{padding:8px 10px}.drawer-apply{position:sticky;bottom:0;background:var(--accent2);color:white;width:100%;margin-top:16px;border-color:var(--accent2);padding:12px}
  .research-sidebar{position:fixed;inset:0 auto 0 0;width:min(365px,90vw);height:100dvh;border:0;border-radius:0;padding:18px 14px;overflow-y:auto;overscroll-behavior:contain;z-index:10002;visibility:hidden;transform:translateX(-100%)}
  .research-sidebar.drawer-open{visibility:visible;transform:translateX(0)}
  .drawer-backdrop{display:block;position:fixed;inset:0;border:0;background:#15292280;z-index:10001;cursor:default}
  body.research-drawer-open{overflow:hidden}
  .category-option,.facet-option{padding:9px 3px;font-size:13px}.category-expand{min-height:38px}.category-option input,.facet-option input{width:16px;height:16px}.category-row{gap:4px}
  .filter-bar{padding:13px}.filter-controls{gap:12px}.year-range input{width:75px}.clear-btn{margin-left:0;min-height:35px}.search-field input{font-size:16px}
  .paper-card{padding:15px}.paper-title{font-size:14px}.paper-heading{gap:8px}.paper-authors{font-size:11px}.paper-metadata{grid-template-columns:1fr;gap:2px;padding:10px}.paper-metadata dd{margin-bottom:8px}.paper-links{gap:8px 16px}.paper-links a{padding:4px 0}.topic-chip{font-size:10px}.page-button{min-height:40px;min-width:38px}
}