/* ===== AACR Poster Library ===== */
:root{
  --bg:#f6f7f9; --panel:#ffffff; --panel-2:#f0f2f5; --ink:#161a20; --ink-2:#586072;
  --line:#e3e6ec; --line-2:#d3d8e0; --accent:#2f6df6; --accent-ink:#fff;
  --chip:#eef1f6; --shadow:0 1px 2px rgba(20,26,40,.06),0 8px 24px rgba(20,26,40,.06);
  --radius:14px; --maxw:1360px;
}
:root[data-theme="dark"]{
  --bg:#0e1116; --panel:#161b23; --panel-2:#1c222c; --ink:#e8ecf3; --ink-2:#98a2b5;
  --line:#252c37; --line-2:#323a48; --accent:#5b8cff; --accent-ink:#0b1020;
  --chip:#20262f; --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px rgba(0,0,0,.35);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0e1116; --panel:#161b23; --panel-2:#1c222c; --ink:#e8ecf3; --ink-2:#98a2b5;
    --line:#252c37; --line-2:#323a48; --accent:#5b8cff; --accent-ink:#0b1020;
    --chip:#20262f; --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px rgba(0,0,0,.35);
  }
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
  font-size:15px; line-height:1.5; -webkit-font-smoothing:antialiased;
}
h1{font-size:1.02rem;margin:0;font-weight:700;letter-spacing:.2px}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}

/* header */
.site-header{
  position:sticky;top:0;z-index:40;display:flex;align-items:center;justify-content:space-between;
  gap:12px;padding:10px clamp(12px,3vw,28px);background:color-mix(in srgb,var(--panel) 88%,transparent);
  backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{font-size:26px;line-height:1}
.brand-text{min-width:0}
.brand-sub{margin:1px 0 0;font-size:12.5px;color:var(--ink-2)}
.header-actions{display:flex;gap:8px;flex-shrink:0}
.ghost-btn{
  border:1px solid var(--line-2);background:var(--panel);color:var(--ink);
  border-radius:10px;padding:7px 11px;font-size:13.5px;cursor:pointer;font-weight:600;
  transition:.15s;white-space:nowrap;
}
.ghost-btn:hover{background:var(--panel-2);border-color:var(--accent)}

/* search */
.searchbar{
  position:sticky;top:53px;z-index:35;display:flex;gap:12px;align-items:center;flex-wrap:wrap;
  padding:12px clamp(12px,3vw,28px);background:var(--bg);border-bottom:1px solid var(--line);
}
.search-wrap{position:relative;flex:1;min-width:240px;display:flex;align-items:center}
.search-ico{position:absolute;left:14px;color:var(--ink-2);pointer-events:none}
#q{
  width:100%;padding:12px 40px 12px 40px;border-radius:12px;border:1px solid var(--line-2);
  background:var(--panel);color:var(--ink);font-size:15px;outline:none;transition:.15s;box-shadow:var(--shadow);
}
#q:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 22%,transparent)}
.clear-q{position:absolute;right:8px;border:none;background:var(--chip);color:var(--ink-2);
  width:26px;height:26px;border-radius:50%;cursor:pointer;font-size:12px}
.chk{display:flex;align-items:center;gap:7px;font-size:13.5px;color:var(--ink-2);cursor:pointer;user-select:none;white-space:nowrap}
.chk input{width:16px;height:16px;accent-color:var(--accent)}

/* tracks toolbar */
.toolbar{padding:10px clamp(12px,3vw,28px) 4px}
.tracks{display:flex;gap:8px;flex-wrap:wrap}
.track-chip{
  --tc:#888;display:inline-flex;align-items:center;gap:7px;padding:6px 12px;border-radius:999px;
  border:1px solid var(--line-2);background:var(--panel);color:var(--ink);font-size:13px;font-weight:600;
  cursor:pointer;transition:.14s;white-space:nowrap;
}
.track-chip .cnt{color:var(--ink-2);font-weight:500;font-size:12px}
.track-chip .dot{width:9px;height:9px;border-radius:50%;background:var(--tc)}
.track-chip:hover{border-color:var(--tc)}
.track-chip.on{background:color-mix(in srgb,var(--tc) 16%,var(--panel));border-color:var(--tc);color:var(--ink)}
.track-chip.on .cnt{color:var(--ink)}

/* subbar */
.subbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  padding:8px clamp(12px,3vw,28px);position:sticky;top:118px;z-index:30;background:var(--bg)}
.sub-left{display:flex;align-items:center;gap:10px}
.result-count{font-size:13px;color:var(--ink-2);font-weight:600}
.result-count b{color:var(--ink)}
.clear-all{border:1px solid var(--line-2);background:var(--panel);color:var(--accent);
  border-radius:999px;padding:4px 11px;font-size:12px;font-weight:600;cursor:pointer;transition:.14s}
.clear-all:hover{background:color-mix(in srgb,var(--accent) 12%,var(--panel));border-color:var(--accent)}
.controls{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.seg{display:inline-flex;border:1px solid var(--line-2);border-radius:10px;overflow:hidden;background:var(--panel)}
.seg button{border:none;background:transparent;color:var(--ink-2);padding:7px 12px;cursor:pointer;font-size:13px;font-weight:600}
.seg button.active{background:var(--accent);color:var(--accent-ink)}
.sel{border:1px solid var(--line-2);background:var(--panel);color:var(--ink);border-radius:10px;padding:7px 10px;font-size:13px;cursor:pointer}

/* results grid */
.results{max-width:var(--maxw);margin:0 auto;padding:12px clamp(12px,3vw,28px) 40px}
.results.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(272px,1fr));gap:16px}
.results.list{display:flex;flex-direction:column;gap:8px}
.results.busy{opacity:.5;pointer-events:none;transition:opacity .12s}

/* card */
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  cursor:pointer;transition:.16s;display:flex;flex-direction:column;position:relative;box-shadow:var(--shadow)
}
.card:hover{transform:translateY(-3px);border-color:var(--line-2);box-shadow:0 6px 14px rgba(20,26,40,.1),0 20px 40px rgba(20,26,40,.1)}
a.card,a.card:hover{color:inherit;text-decoration:none}
.card-thumb{
  position:relative;aspect-ratio:4/3;background:var(--panel-2);overflow:hidden;
  display:flex;align-items:center;justify-content:center;border-bottom:1px solid var(--line)
}
.card-thumb img{width:100%;height:100%;object-fit:cover;object-position:top center;display:block}
.thumb-ph{width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  background:linear-gradient(135deg,color-mix(in srgb,var(--tc) 22%,var(--panel)),color-mix(in srgb,var(--tc) 6%,var(--panel)))}
.thumb-ph .ph-num{font-weight:800;font-size:20px;letter-spacing:.5px;color:var(--tc)}
.thumb-ph .ph-ico{font-size:26px;opacity:.5}
.card-body{padding:11px 13px 13px;display:flex;flex-direction:column;gap:7px;flex:1}
.card-top{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.pnum{font-size:11.5px;font-weight:800;letter-spacing:.3px;color:var(--tc);background:color-mix(in srgb,var(--tc) 15%,transparent);padding:2px 7px;border-radius:6px}
.badge{font-size:10.5px;font-weight:700;padding:2px 6px;border-radius:6px}
.badge.pdf{color:#0a7d3c;background:color-mix(in srgb,#12a150 16%,transparent)}
.badge.nopdf{color:var(--ink-2);background:var(--chip)}
.card-title{font-size:13.5px;font-weight:650;line-height:1.36;margin:0;
  display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
.card-auth{font-size:12px;color:var(--ink-2);line-height:1.35;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-snip{font-size:11.5px;line-height:1.45;color:var(--ink-2);padding:6px 8px;background:color-mix(in srgb,var(--tc) 7%,var(--panel-2));
  border-left:2px solid var(--tc);border-radius:0 6px 6px 0;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-snip mark{background:color-mix(in srgb,var(--accent) 34%,transparent)}
.card-sess{margin-top:auto;font-size:11.5px;color:var(--ink-2);display:flex;align-items:center;gap:6px;padding-top:4px;border-top:1px dashed var(--line)}
.card-sess .tk{color:var(--tc);font-weight:700}
mark{background:color-mix(in srgb,var(--accent) 30%,transparent);color:inherit;border-radius:3px;padding:0 1px}

/* list mode */
.results.list .card{flex-direction:row;align-items:stretch}
.results.list .card-thumb{width:120px;flex-shrink:0;aspect-ratio:auto;border-bottom:none;border-right:1px solid var(--line)}
.results.list .card-title{-webkit-line-clamp:2}
.results.list .card-auth{-webkit-line-clamp:1}

/* pager */
.pager{display:flex;justify-content:center;align-items:center;gap:6px;flex-wrap:wrap;padding:0 16px 50px}
.pager button{border:1px solid var(--line-2);background:var(--panel);color:var(--ink);border-radius:9px;
  min-width:38px;height:38px;padding:0 10px;cursor:pointer;font-size:13.5px;font-weight:600}
.pager button:hover:not(:disabled){border-color:var(--accent)}
.pager button.active{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.pager button:disabled{opacity:.4;cursor:default}
.pager .gap{color:var(--ink-2);padding:0 2px}

.empty{max-width:var(--maxw);margin:40px auto;text-align:center;color:var(--ink-2);padding:40px}
.loading{text-align:center;color:var(--ink-2);padding:60px 20px}

/* drawer */
.scrim{position:fixed;inset:0;background:rgba(6,9,14,.5);z-index:60;backdrop-filter:blur(2px)}
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(420px,92vw);background:var(--panel);z-index:70;
  border-left:1px solid var(--line);display:flex;flex-direction:column;box-shadow:-20px 0 50px rgba(0,0,0,.25)}
.drawer-head{display:flex;align-items:center;gap:10px;padding:14px 16px;border-bottom:1px solid var(--line)}
.drawer-head strong{font-size:14px;white-space:nowrap}
.drawer-head input{flex:1;border:1px solid var(--line-2);background:var(--bg);color:var(--ink);border-radius:9px;padding:8px 10px;font-size:13px;outline:none}
.sess-list{overflow:auto;padding:8px}
.sess-item{padding:10px 12px;border-radius:10px;cursor:pointer;border-left:3px solid var(--tc);margin-bottom:5px;background:var(--bg)}
.sess-item:hover{background:var(--panel-2)}
.sess-item .st{font-size:11px;font-weight:800;color:var(--tc)}
.sess-item .sn{font-size:13px;font-weight:600;margin:2px 0;line-height:1.3}
.sess-item .sm{font-size:11.5px;color:var(--ink-2)}

/* modal */
.modal{position:fixed;inset:0;z-index:80;display:flex;align-items:center;justify-content:center;
  padding:clamp(8px,2vw,28px);background:rgba(6,9,14,.62);backdrop-filter:blur(3px)}
.modal-card{position:relative;width:min(1080px,100%);max-height:94vh;background:var(--panel);
  border-radius:18px;border:1px solid var(--line);box-shadow:0 30px 80px rgba(0,0,0,.5);
  display:flex;flex-direction:column;overflow:hidden}
.m-close{position:absolute;top:12px;right:12px;z-index:5;border:none;background:var(--chip);color:var(--ink);
  width:34px;height:34px;border-radius:50%;cursor:pointer;font-size:15px}
.m-close:hover{background:var(--line-2)}
.m-nav{position:absolute;top:12px;right:56px;z-index:5;display:flex;gap:6px}
.m-nav button{border:none;background:var(--chip);color:var(--ink);width:34px;height:34px;border-radius:50%;
  cursor:pointer;font-size:20px;line-height:1;display:flex;align-items:center;justify-content:center}
.m-nav button:hover{background:var(--line-2)}
.m-nav button:disabled{opacity:.35;cursor:default}
.m-body{overflow:auto;padding:26px clamp(18px,3vw,34px)}
.m-track{display:inline-flex;align-items:center;gap:7px;font-size:12px;font-weight:700;color:var(--tc);margin-bottom:8px}
.m-track .dot{width:9px;height:9px;border-radius:50%;background:var(--tc)}
.m-title{font-size:clamp(18px,2.4vw,23px);font-weight:750;line-height:1.28;margin:0 40px 12px 0}
.m-meta{display:flex;flex-wrap:wrap;gap:8px 14px;font-size:12.5px;color:var(--ink-2);margin-bottom:16px}
.m-meta .mm{display:inline-flex;align-items:center;gap:5px}
.m-meta b{color:var(--ink);font-weight:650}
.m-actions{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:18px}
.btn{display:inline-flex;align-items:center;gap:7px;border-radius:11px;padding:10px 16px;font-size:13.5px;
  font-weight:650;cursor:pointer;border:1px solid var(--line-2);background:var(--panel);color:var(--ink);transition:.15s}
.btn:hover{border-color:var(--accent);text-decoration:none}
.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.btn.disabled{opacity:.45;pointer-events:none}
.m-sec{margin:18px 0}
.m-sec h3{font-size:12px;text-transform:uppercase;letter-spacing:.6px;color:var(--ink-2);margin:0 0 7px}
.m-authors{font-size:13.5px;line-height:1.6}
.m-authors sup{color:var(--accent);font-size:.7em}
.m-abstract{font-size:14px;line-height:1.7;color:var(--ink);white-space:pre-wrap}
.m-disc{font-size:12px;color:var(--ink-2);line-height:1.5;white-space:pre-wrap}
details.m-fold{border:1px solid var(--line);border-radius:10px;padding:0}
details.m-fold summary{cursor:pointer;padding:10px 14px;font-size:12.5px;font-weight:600;color:var(--ink-2)}
details.m-fold[open] summary{border-bottom:1px solid var(--line)}
details.m-fold .fold-body{padding:12px 14px}
.pdf-frame{width:100%;height:78vh;border:1px solid var(--line);border-radius:12px;margin-top:8px;background:var(--panel-2)}
.chips-kw{display:flex;gap:6px;flex-wrap:wrap}
.kw{font-size:11.5px;background:var(--chip);color:var(--ink-2);padding:3px 9px;border-radius:999px}

.site-footer{max-width:var(--maxw);margin:0 auto;padding:22px clamp(12px,3vw,28px) 40px;color:var(--ink-2);
  font-size:12px;border-top:1px solid var(--line);display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.dot{opacity:.5}

@media (max-width:640px){
  .searchbar{top:53px}
  .subbar{top:auto;position:static}
  .results.grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
  .card-title{font-size:12.5px;-webkit-line-clamp:3}
  .results.list .card-thumb{width:84px}
  .brand-sub{display:none}
  .auth-email{display:none}
}

/* ---------- auth ---------- */
.auth-area{display:flex;align-items:center;gap:8px}
.auth-email{font-size:12.5px;color:var(--ink-2);max-width:170px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ghost-btn.accent{border-color:var(--accent);color:var(--accent)}
.ghost-btn.accent:hover{background:color-mix(in srgb,var(--accent) 12%,var(--panel));border-color:var(--accent)}

.auth-modal{position:fixed;inset:0;z-index:90;display:flex;align-items:center;justify-content:center;
  padding:clamp(8px,2vw,28px);background:rgba(6,9,14,.62);backdrop-filter:blur(3px)}
.auth-card{position:relative;width:min(400px,100%);background:var(--panel);border:1px solid var(--line);
  border-radius:18px;box-shadow:0 30px 80px rgba(0,0,0,.5);padding:26px 24px 22px}
.auth-card h2{margin:0 0 4px;font-size:19px;font-weight:750}
.auth-intro{margin:0 0 16px;font-size:13px;color:var(--ink-2);line-height:1.5}
.auth-close{position:absolute;top:12px;right:12px;border:none;background:var(--chip);color:var(--ink);
  width:32px;height:32px;border-radius:50%;cursor:pointer;font-size:14px}
.auth-close:hover{background:var(--line-2)}
.auth-form{display:flex;flex-direction:column;gap:12px}
.auth-form label{display:flex;flex-direction:column;gap:5px;font-size:12.5px;font-weight:600;color:var(--ink-2)}
.auth-form input{border:1px solid var(--line-2);background:var(--bg);color:var(--ink);border-radius:10px;
  padding:11px 12px;font-size:15px;outline:none;transition:.15s}
.auth-form input:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 22%,transparent)}
.auth-err{background:color-mix(in srgb,#e5484d 13%,transparent);color:#c62b30;border-radius:9px;
  padding:9px 11px;font-size:12.5px;line-height:1.4}
:root[data-theme="dark"] .auth-err{color:#ff9a9d}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .auth-err{color:#ff9a9d}}
.auth-submit{margin-top:4px;justify-content:center;width:100%;padding:12px}
.auth-submit:disabled{opacity:.6;pointer-events:none}
.auth-switch{margin-top:14px;text-align:center;font-size:12.5px;color:var(--ink-2)}
.auth-switch a{font-weight:600;cursor:pointer}
.auth-lock-hint{flex-basis:100%;font-size:12px;color:var(--ink-2);display:flex;align-items:center;gap:5px;
  background:var(--chip);border-radius:9px;padding:8px 11px}

/* ---------- server-rendered doc pages (poster / session / browse) ---------- */
.doc-wrap{max-width:900px;margin:0 auto;padding:26px clamp(14px,3vw,28px) 60px}
.crumbs{font-size:12.5px;color:var(--ink-2);margin-bottom:14px;display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.crumbs a{color:var(--ink-2)}.crumbs a:hover{color:var(--accent)}
.crumbs .sep{opacity:.5}
.doc-track{display:inline-flex;align-items:center;gap:7px;font-size:12px;font-weight:700;color:var(--tc,#2f6df6);margin-bottom:8px}
.doc-track .dot{width:9px;height:9px;border-radius:50%;background:var(--tc,#2f6df6)}
.doc-title{font-size:clamp(19px,2.6vw,26px);font-weight:750;line-height:1.28;margin:0 0 14px}
.doc-meta{display:flex;flex-wrap:wrap;gap:8px 16px;font-size:13px;color:var(--ink-2);margin-bottom:18px}
.doc-meta b{color:var(--ink);font-weight:650}
.doc-actions{display:flex;gap:10px;flex-wrap:wrap;margin:16px 0 22px;align-items:center}
.doc-sec{margin:22px 0}
.doc-sec h2{font-size:13px;text-transform:uppercase;letter-spacing:.6px;color:var(--ink-2);margin:0 0 8px;font-weight:700}
.doc-authors{font-size:14px;line-height:1.6}
.doc-authors sup{color:var(--accent);font-size:.7em}
.doc-abstract{font-size:15px;line-height:1.75;color:var(--ink);white-space:pre-wrap}
.doc-lead{font-size:15px;line-height:1.7;color:var(--ink-2);max-width:70ch}
.doc-thumb{float:right;width:210px;max-width:38%;border:1px solid var(--line);border-radius:12px;margin:0 0 14px 18px;box-shadow:var(--shadow)}
@media(max-width:560px){.doc-thumb{float:none;width:100%;max-width:100%;margin:0 0 14px}}
.lock-note{font-size:12.5px;color:var(--ink-2);background:var(--chip);border-radius:9px;padding:9px 12px;display:inline-flex;gap:6px;align-items:center}

/* card/session grids on doc pages reuse .card etc.; extra list for posters */
.poster-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px}
.poster-list a{display:flex;gap:12px;padding:12px;border:1px solid var(--line);border-radius:12px;background:var(--panel);color:inherit;transition:.15s;box-shadow:var(--shadow)}
.poster-list a:hover{border-color:var(--accent);text-decoration:none;transform:translateY(-2px)}
.poster-list img{width:66px;height:88px;object-fit:cover;object-position:top;border-radius:7px;background:var(--panel-2);flex-shrink:0;border:1px solid var(--line)}
.pl-num{font-size:11px;font-weight:800;color:var(--tc,#2f6df6)}
.pl-title{font-size:13px;font-weight:600;line-height:1.35;margin:3px 0 0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.pl-auth{font-size:11.5px;color:var(--ink-2);margin-top:3px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}

/* session directory on home / browse */
.seo-index{max-width:var(--maxw);margin:0 auto;padding:10px clamp(12px,3vw,28px) 40px;border-top:1px solid var(--line)}
.seo-index h2{font-size:15px;margin:18px 0 4px}
.seo-index .lead{font-size:13.5px;color:var(--ink-2);line-height:1.6;margin:0 0 16px;max-width:80ch}
.track-group{margin:14px 0}
.track-group h3{font-size:12.5px;font-weight:700;color:var(--tc,#2f6df6);margin:0 0 7px;display:flex;align-items:center;gap:7px}
.track-group h3 .dot{width:9px;height:9px;border-radius:50%;background:var(--tc,#2f6df6)}
.sess-links{display:flex;flex-wrap:wrap;gap:6px}
.sess-links a{font-size:12px;color:var(--ink-2);background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:5px 9px;transition:.14s}
.sess-links a:hover{border-color:var(--accent);color:var(--accent);text-decoration:none}