[hidden]{display:none!important}

:root{
  --bg:#f6f7f9; --panel:#fff; --ink:#14181f; --ink2:#4a5261; --ink3:#7b8494;
  --line:#e4e7ec; --line2:#eef0f3;
  --accent:#1d4f91; --accent-2:#0f766e; --accent-ink:#fff; --accent-soft:#e9f0fa;
  --warn:#9a5b00; --warn-soft:#fff6e6;
  --radius:14px;
  --shadow:0 1px 2px rgba(16,24,40,.04),0 1px 3px rgba(16,24,40,.06);
  --shadow-lg:0 12px 32px rgba(16,24,40,.14);
  /* the same Latin stacks as ChemASAP, with CJK fallbacks appended */
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Text","Inter","Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --serif:"Charter","Iowan Old Style","Source Serif Pro",Georgia,"Songti SC","Noto Serif SC",serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:15px/1.5 var(--font);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
button{font:inherit;color:inherit}
a{color:var(--accent)}
.ic{width:18px;height:18px;flex:none}

.skip{position:absolute;left:-9999px;top:8px;z-index:100;background:var(--ink);color:#fff;padding:8px 14px;border-radius:8px}
.skip:focus{left:12px}

:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}

/* ---------------- top bar ---------------- */
.topbar{
  position:sticky;top:0;z-index:20;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
}
.topbar-inner{
  max-width:1080px;margin:0 auto;padding:12px 20px 8px;
  padding-top:max(12px,env(safe-area-inset-top));
  display:flex;align-items:center;gap:16px;justify-content:space-between;
}
.brand{display:flex;align-items:center;gap:11px;min-width:0}
.logo{width:34px;height:34px;color:var(--accent);flex:none}
.brand-text{min-width:0}
.brand-line{display:flex;align-items:baseline;gap:9px;min-width:0}
.brand h1{margin:0;font-size:20px;letter-spacing:-.02em;font-weight:700;line-height:1.1;white-space:nowrap}
.zh-name{font-size:12.5px;font-weight:550;color:var(--ink3);letter-spacing:.02em;white-space:nowrap}
.updated{font-size:12.5px;color:var(--ink3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;line-height:1.5}
.actions{display:flex;gap:8px;flex:none}

.btn{
  display:inline-flex;align-items:center;gap:7px;height:36px;padding:0 14px;
  border-radius:10px;border:1px solid var(--line);background:#fff;cursor:pointer;
  font-weight:550;font-size:14px;transition:background .15s,border-color .15s,transform .05s;
}
.btn:hover{background:#f4f6f8}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.primary:hover{background:#174279}
.btn.ghost{background:transparent}
.btn.small{height:30px;padding:0 11px;font-size:13px;border-radius:8px}
.btn[disabled]{opacity:.55;cursor:default}
.btn .count{background:rgba(255,255,255,.22);border-radius:999px;padding:0 7px;font-size:12px;line-height:19px;min-width:20px;text-align:center}
.btn.spinning .ic{animation:spin .9s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.btn.lang .lang-ic{
  display:inline-flex;align-items:center;justify-content:center;
  width:20px;height:20px;border-radius:6px;background:#eef1f5;color:var(--ink3);
  font-size:11.5px;font-weight:700;line-height:1;
}
.btn.lang.on .lang-ic{background:var(--accent);color:#fff}
.btn.lang:not(.on) .lang-ic{background:#f0f2f5;color:#9aa3b2}

/* ---------------- toolbar ---------------- */
.toolbar{max-width:1080px;margin:0 auto;padding:4px 20px 10px;display:flex;gap:12px;align-items:center}
.journal-nav{flex:1;display:flex;align-items:center;gap:8px;min-width:0}
.journal-nav>.btn{flex-shrink:0;padding:8px 12px;height:34px}
.chips{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;flex:1;min-width:0;padding:2px 0}
.chips::-webkit-scrollbar{display:none}
.chip{
  flex:none;display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 11px;
  border-radius:999px;border:1px solid var(--line);background:#fff;font-size:13px;font-weight:550;
  color:var(--ink2);cursor:pointer;white-space:nowrap;transition:background .15s,border-color .15s;
}
.chip:hover{background:#f4f6f8}
.chip .dot{width:8px;height:8px;border-radius:50%;flex:none}
.chip .n{color:var(--ink3);font-weight:500;font-variant-numeric:tabular-nums}
.chip[aria-selected=true]{background:var(--ink);border-color:var(--ink);color:#fff}
.chip[aria-selected=true] .n{color:#c9ced8}

.search{
  flex:0 1 310px;display:flex;align-items:center;gap:8px;height:34px;padding:0 10px;
  border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink3);
}
.search input{border:0;outline:0;font:inherit;font-size:14px;flex:1;min-width:0;background:transparent;color:var(--ink)}
.search input::placeholder{color:#9aa3b2}
.search:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.search kbd{font:600 11px/1 var(--mono);color:var(--ink3);border:1px solid var(--line);border-bottom-width:2px;border-radius:5px;padding:3px 5px;background:#fafbfc}

/* ---------------- feed ---------------- */
main{max-width:1080px;margin:0 auto;padding:18px 20px 60px}
.feed{display:flex;flex-direction:column;gap:14px}
.day{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--ink3);margin:10px 2px -2px}

.card{
  display:grid;grid-template-columns:340px 1fr;gap:0;background:var(--panel);
  border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);
  overflow:hidden;transition:box-shadow .2s,border-color .2s;position:relative;
}
.card:hover{box-shadow:0 4px 18px rgba(16,24,40,.08);border-color:#d9dde4}

.ga{position:relative;background:#fff;border-right:1px solid var(--line2);display:flex;align-items:center;justify-content:center;min-height:190px;cursor:zoom-in;padding:10px}
.ga img{max-width:100%;max-height:260px;object-fit:contain;display:block}
.ga .tag{position:absolute;left:8px;bottom:8px;font-size:10.5px;font-weight:650;letter-spacing:.03em;padding:2px 7px;border-radius:6px;background:rgba(20,24,31,.72);color:#fff}

.card.noimg{grid-template-columns:150px 1fr}
.mono{
  cursor:default;padding:0;
  background-color:#f3f5f8;
  background-color:color-mix(in srgb,var(--mono,#334) 7%,#fff);
  background-image:radial-gradient(color-mix(in srgb,var(--mono,#334) 26%,transparent) 1px,transparent 1.5px);
  background-size:16px 16px;
  background-position:center;
  border-right:1px solid var(--line2);
  position:relative;overflow:hidden;
}
.mono .mono-inner{
  width:100%;height:100%;min-height:190px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:7px;color:var(--mono,#334);
  position:relative;padding:16px 10px;z-index:1;
}
.mono svg.hexes{position:absolute;inset:0;width:100%;height:100%;opacity:.14;z-index:0}
.mono svg.hexes g{stroke:var(--mono,#334)}
.mono .abbr{font:700 23px/1.15 var(--serif);letter-spacing:-.01em;position:relative;text-align:center;max-width:100%;overflow:hidden;text-overflow:ellipsis}
.mono .sub{
  font-size:9.5px;opacity:.8;position:relative;font-weight:650;letter-spacing:.09em;
  text-transform:uppercase;text-align:center;line-height:1.35;
}
.mono .rule{width:22px;height:2px;background:currentColor;opacity:.28;border-radius:1px;position:relative}

.body{padding:16px 20px 14px;display:flex;flex-direction:column;gap:7px;min-width:0}

.meta{display:flex;flex-wrap:wrap;align-items:center;gap:6px 8px;font-size:12.5px;color:var(--ink3)}
.pill{display:inline-flex;align-items:center;height:22px;padding:0 9px;border-radius:999px;font-size:12px;font-weight:650;color:#fff;background:var(--c,#333);letter-spacing:.01em}
.badge{display:inline-flex;align-items:center;height:22px;padding:0 8px;border-radius:6px;font-size:11.5px;font-weight:600;color:var(--ink2);background:#f1f3f6}
.badge.pre{background:var(--warn-soft);color:var(--warn)}
.badge.oa{background:#e5f5eb;color:#176435}
.sep{width:3px;height:3px;border-radius:50%;background:#c3c8d1}
.meta time{font-variant-numeric:tabular-nums;white-space:nowrap}

.title{margin:0;font:600 18px/1.32 var(--serif);letter-spacing:-.005em;color:var(--ink)}
.title a{color:inherit;text-decoration:none}
.title a:hover{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}

/* Chinese translation line */
.zh-title{
  display:flex;align-items:flex-start;gap:7px;margin:-1px 0 0;
  font:400 14.5px/1.62 var(--font);color:#3c4654;letter-spacing:.005em;
}
.zh-mark{
  flex:none;display:inline-flex;align-items:center;justify-content:center;
  width:18px;height:18px;border-radius:5px;margin-top:2px;
  background:var(--accent-soft);color:var(--accent);font-size:11px;font-weight:700;line-height:1;
}
body.zh-off .zh-title{display:none}

.authors{
  font-size:13.5px;color:var(--ink2);line-height:1.45;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;cursor:pointer;
}
.authors:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

.abstract{
  font-size:14px;color:#2b313c;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden;
}
.card.open .abstract{-webkit-line-clamp:unset;display:block}
.card.open .authors{-webkit-line-clamp:unset;display:block}
.abstract sub,.abstract sup{line-height:0}
.abstract .lead{font-size:11px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--ink3);margin-right:4px}

.foot{display:flex;align-items:center;gap:6px;margin-top:4px;flex-wrap:wrap}
.link{
  display:inline-flex;align-items:center;gap:5px;height:30px;padding:0 11px;border-radius:8px;
  font-size:13px;font-weight:600;text-decoration:none;border:1px solid var(--line);
  color:var(--ink);background:#fff;cursor:pointer;
}
.link:hover{background:#f4f6f8}
.link.primary{color:var(--accent);border-color:#cfdcef;background:var(--accent-soft)}
.link.primary:hover{background:#dde8f7}
.doi{
  margin-left:auto;font:12px/1.2 var(--mono);color:var(--ink3);background:none;border:0;
  cursor:copy;padding:5px 4px;border-radius:6px;max-width:48%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.doi:hover{background:#f1f3f6;color:var(--ink2)}

/* skeleton */
.sk{background:linear-gradient(90deg,#eef0f3 0,#f7f8fa 40%,#eef0f3 80%);background-size:300% 100%;animation:sh 1.3s ease-in-out infinite;border-radius:6px}
@keyframes sh{0%{background-position:100% 0}100%{background-position:0 0}}
.card.skel .ga{cursor:default}
.card.skel .ga .sk{width:100%;height:170px}

/* banners / empty */
.banner{border:1px solid #f3d9a8;background:var(--warn-soft);color:#6b4300;border-radius:12px;padding:10px 14px;font-size:13.5px;margin-bottom:14px}
.empty{text-align:center;padding:70px 20px;color:var(--ink2);background:#fff;border:1px dashed #d6dbe3;border-radius:var(--radius)}
.empty svg{color:#9aa3b2}
.empty h3{margin:12px 0 6px;font:600 20px var(--serif);color:var(--ink)}
.empty p{margin:0 0 18px;font-size:14px}
.empty .zh{margin-top:-10px;margin-bottom:18px;font-size:12.5px;color:var(--ink3)}
.sources{margin-top:26px;font-size:12px;color:var(--ink3);display:flex;flex-wrap:wrap;gap:6px 14px;justify-content:center}
.sources span{white-space:nowrap}
.sources .ok::before{content:"●";color:#2e9e5b;margin-right:5px}
.sources .cached::before{content:"●";color:#d39b00;margin-right:5px}
.sources .bad::before{content:"●";color:#c0392b;margin-right:5px}
.sources .idle::before{content:"●";color:#c3c8d1;margin-right:5px}

.colophon{max-width:720px;margin:26px auto 0;text-align:center;font-size:11.5px;line-height:1.65;color:#8a93a1}
.colophon p{margin:0 0 4px}
.colophon .zh-note{color:#98a0ad}

.noscript{padding:40px;text-align:center;color:var(--ink2)}

.more{display:flex;justify-content:center;padding:18px 0 6px;color:var(--ink3);font-size:13px}
.more:empty{padding:0}

/* ---------------- drawer ---------------- */
.scrim{position:fixed;inset:0;background:rgba(15,20,30,.38);z-index:40;animation:fade .2s}
@keyframes fade{from{opacity:0}}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(420px,100vw);background:#fff;z-index:50;
  box-shadow:var(--shadow-lg);display:flex;flex-direction:column;
  transform:translateX(102%);transition:transform .28s cubic-bezier(.2,.8,.2,1);
}
.drawer.open{transform:none}
.drawer-head{display:flex;justify-content:space-between;align-items:flex-start;padding:20px 20px 10px;padding-top:max(20px,env(safe-area-inset-top))}
.drawer-head h2{margin:0;font:700 22px var(--serif)}
.drawer-head p{margin:2px 0 0;color:var(--ink3);font-size:13.5px}
.icon-btn{border:0;background:#f1f3f6;width:32px;height:32px;border-radius:50%;cursor:pointer;font-size:14px;color:var(--ink2)}
.drawer-quick{display:flex;gap:6px;padding:4px 20px 12px;border-bottom:1px solid var(--line)}
.drawer-body{flex:1;overflow:auto;padding:6px 10px 10px}
.group-label{font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--ink3);padding:14px 10px 6px}
.jrow{display:flex;align-items:center;gap:12px;padding:10px;border-radius:10px;cursor:pointer;user-select:none}
.jrow:hover{background:#f6f7f9}
.jrow .sw{width:38px;height:38px;border-radius:9px;color:#fff;font:700 10px/1.1 var(--font);display:flex;align-items:center;justify-content:center;flex:none;text-align:center;letter-spacing:-.01em;padding:2px}
.jrow .txt{flex:1;min-width:0}
.jrow .nm{font-weight:600;font-size:14.5px;line-height:1.25}
.jrow .pub{font-size:12.5px;color:var(--ink3);line-height:1.35}
.toggle{position:relative;width:42px;height:25px;flex:none}
.toggle input{opacity:0;position:absolute;inset:0;margin:0;cursor:pointer}
.toggle span{position:absolute;inset:0;background:#d5d9e0;border-radius:999px;transition:background .18s;pointer-events:none}
.toggle span::after{content:"";position:absolute;width:19px;height:19px;left:3px;top:3px;background:#fff;border-radius:50%;box-shadow:0 1px 2px rgba(0,0,0,.2);transition:transform .18s}
.toggle input:checked+span{background:var(--accent)}
.toggle input:checked+span::after{transform:translateX(17px)}
.toggle input:focus-visible+span{box-shadow:0 0 0 3px var(--accent-soft)}
.drawer-foot{display:flex;gap:8px;justify-content:flex-end;padding:14px 20px;border-top:1px solid var(--line);padding-bottom:max(14px,env(safe-area-inset-bottom))}
.drawer-foot .btn{height:40px}
.drawer-note{font-size:12px;color:var(--ink3);padding:6px 10px 0;line-height:1.6}
.drawer-note strong{color:var(--ink2);font-weight:600}

/* ---------------- lightbox / toast ---------------- */
.lightbox{position:fixed;inset:0;z-index:60;background:rgba(10,12,16,.82);display:flex;align-items:center;justify-content:center;padding:24px;cursor:zoom-out;animation:fade .15s}
.lightbox figure{margin:0;max-width:min(1100px,96vw);max-height:92vh;display:flex;flex-direction:column;gap:10px}
.lightbox img{background:#fff;border-radius:10px;max-width:100%;max-height:82vh;object-fit:contain;padding:12px}
.lightbox figcaption{color:#e8ebf0;font:500 14px/1.4 var(--serif);text-align:center}

.toast{
  position:fixed;left:50%;bottom:22px;transform:translateX(-50%);
  background:var(--ink);color:#fff;padding:8px 14px;border-radius:10px;font-size:13px;
  z-index:70;box-shadow:var(--shadow-lg);animation:fade .2s;
}

body.drawer-open{overflow:hidden}

/* ---------------- responsive ---------------- */
@media (max-width:900px){
  .card{grid-template-columns:280px 1fr}
}
@media (max-width:760px){
  .topbar-inner{padding:10px 14px 6px;gap:10px}
  .toolbar{padding:2px 14px 10px;flex-direction:column;align-items:stretch;gap:8px}
  .search{flex:none}
  .search kbd{display:none}
  main{padding:12px 12px 50px}
  .card{grid-template-columns:1fr}
  .ga{border-right:0;border-bottom:1px solid var(--line2);min-height:150px}
  .ga img{max-height:230px}
  .mono .mono-inner{min-height:96px}
  .card.noimg{grid-template-columns:1fr;border-left:4px solid var(--c)}
  .card.noimg .ga{display:none}
  .body{padding:14px 15px 12px}
  .title{font-size:17px}
  .zh-title{font-size:13.5px}
  .btn .lbl{display:none}
  .btn{padding:0 11px}
  .doi{display:none}
  .brand h1{font-size:18px}
  .zh-name{font-size:11.5px}
  .updated{font-size:11.5px}
  .logo{width:30px;height:30px}
  .journal-nav>.btn{display:none}
}
@media (max-width:520px){
  .brand-line{flex-direction:column;align-items:flex-start;gap:0}
  .brand h1{font-size:17px;line-height:1.15}
  .zh-name{font-size:10.5px;line-height:1.3}
  .updated{display:none}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
}