/* Fold Proteins — top bar (all pages) and the Learn / About article pages.
   Sits on top of assets/css/biomodels.css (colours, fonts). Same classes as Brain Energy's site.css (.be-*)
   so the two apps look alike; the app page (index.php) adds body.be .aa-app below. */
:root{
  --top:#1d2b40; --top2:#2b3d57; --top-line:#0f1928; --top-ink:#c3cfdf;
  --energy:#ffc83d; --energy-ink:#8a5a00;
  --page:#f3f5f8; --card:#fff; --a:#1d5f9a; --a-soft:#e3ecf7;
}
html,body{height:100%}
body.be{display:flex;flex-direction:column;height:100vh;overflow:hidden}
body.be > .aa-app{flex:1 1 auto;min-height:0;height:auto}

/* ---------------------------------------------------------------- top bar */
.be-top{position:relative;z-index:30;flex:0 0 auto;display:flex;align-items:stretch;gap:6px;min-height:52px;padding:0 12px 0 6px;
  background:linear-gradient(180deg,var(--top2),var(--top));border-bottom:1px solid var(--top-line);color:#fff}
.be-home{display:flex;align-items:center;justify-content:center;width:34px;margin:9px 0;border-radius:6px;color:var(--top-ink);text-decoration:none}
.be-home:hover{background:rgba(255,255,255,.1);color:#fff}
.be-brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;flex:none;padding-right:8px}
.be-brand img{display:block;width:30px;height:30px}
.be-name{font-size:18px;font-weight:750;letter-spacing:-.01em;white-space:nowrap}
.be-tabs{position:absolute;left:50%;top:0;bottom:0;transform:translateX(-50%);display:flex;gap:2px}
.be-tabs button,.be-tabs a{appearance:none;display:flex;align-items:center;border:none;background:none;font:inherit;font-size:14px;font-weight:650;
  color:var(--top-ink);padding:3px 16px 0;cursor:pointer;text-decoration:none;white-space:nowrap;border-bottom:3px solid transparent}
.be-tabs button:hover,.be-tabs a:hover{color:#fff}
.be-tabs button.on{color:#fff;border-bottom-color:var(--energy)}
.be-pages{margin-left:auto;display:flex;align-items:center;gap:8px}
.be-btn{display:inline-flex;align-items:center;gap:7px;height:32px;padding:0 13px;border-radius:8px;border:1px solid rgba(255,255,255,.28);
  background:rgba(255,255,255,.07);color:#fff;text-decoration:none;font-size:13px;font-weight:650;white-space:nowrap;transition:background .15s,border-color .15s}
.be-btn:hover{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.5)}
.be-btn.on{background:var(--energy);border-color:var(--energy);color:#1d2b40}
.be-btn svg{display:block;flex:none}

@media (max-width:1000px){
  .be-top{flex-wrap:wrap;padding:0 10px 0 4px}
  .be-tabs{position:static;transform:none;order:3;flex-basis:100%;min-height:40px;overflow-x:auto;justify-content:center;border-top:1px solid rgba(255,255,255,.08)}
  .be-tabs button,.be-tabs a{padding:0 12px}
  .be-brand,.be-pages{min-height:52px}
}
@media (max-width:520px){
  .be-name{font-size:16px}
  .be-btn{padding:0 9px}
  .be-btn span{display:none}
}

/* ---------------------------------------------------------------- article pages (Learn, About) */
body.be-article{overflow:hidden}
.be-page{flex:1 1 auto;min-height:0;overflow-y:auto;background:var(--page)}
.be-wrap{display:flex;max-width:1100px;margin:0 auto;min-height:100%}
.be-menu{flex:none;width:220px;position:sticky;top:0;align-self:flex-start;padding:36px 0 20px 18px;display:flex;flex-direction:column;gap:2px}
.be-menu .mhd{font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-soft);padding:0 14px 8px}
.be-menu a{display:block;padding:8px 14px;border-radius:8px;color:var(--ink);text-decoration:none;font-weight:600;font-size:14px;border-left:3px solid transparent}
.be-menu a:hover{background:#e6eaf0}
.be-menu a.on{background:var(--a-soft);color:var(--a);border-left-color:var(--a)}
.be-menu a.sub{padding-left:28px;font-size:13px;font-weight:500}
.be-body{flex:1;min-width:0;background:#fff;border-left:1px solid var(--line);border-right:1px solid var(--line)}
.be-sec[hidden]{display:none}
.be-sec{max-width:780px;margin:0 auto;padding:40px 30px 70px;font-size:16px;line-height:1.65;color:var(--ink)}
.be-sec .kicker{text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:700;color:var(--a);margin:0 0 6px}
.be-sec h1{font-size:32px;line-height:1.2;margin:0 0 12px;text-wrap:balance}
.be-sec .lede{font-size:19px;color:#3d4a59;margin:0 0 26px;text-wrap:pretty}
.be-sec h2{font-size:21px;margin:34px 0 10px}
.be-sec h3{font-size:16px;margin:0 0 4px}
.be-sec p{margin:0 0 14px}
.be-sec ul,.be-sec ol{padding-left:22px;margin:0 0 14px}
.be-sec li{margin:4px 0}
.be-sec a{color:var(--a)}
.be-sec .note{font-size:13px;color:var(--ink-soft);line-height:1.5}
.be-sec .try{display:flex;gap:10px;align-items:flex-start;background:#fff8e6;border:1px solid #f3dca2;border-radius:10px;padding:12px 14px;margin:22px 0 6px;font-size:14.5px}
.be-sec .try b{color:var(--energy-ink)}
.be-sec .try .ico{flex:none;width:26px;height:26px;border-radius:50%;background:var(--energy);color:#1d2b40;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px}
.be-sec .btn{display:inline-flex;font-size:13px;padding:7px 14px;text-decoration:none}

/* big numbers */
.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:8px 0 22px}
.facts > div{background:#f7f9fb;border:1px solid var(--line);border-radius:10px;padding:12px 14px}
.facts b{display:block;font-size:24px;line-height:1.15;color:var(--ink);font-variant-numeric:tabular-nums}
.facts span{display:block;font-size:13px;color:var(--ink-soft);line-height:1.4;margin-top:3px}

.cards{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:10px 0 18px}
.cards.three{grid-template-columns:repeat(3,1fr)}
.cards > div{background:#fff;border:1px solid var(--line);border-radius:10px;padding:13px 15px}
.cards > div.c{border-top:3px solid var(--c,var(--accent))}
.cards p{margin:0;font-size:14px;color:#3d4a59;line-height:1.5}

/* simple tables */
.tbl{overflow-x:auto;margin:8px 0 18px}
.tbl table{border-collapse:collapse;width:100%;font-size:14px;line-height:1.45}
.tbl th,.tbl td{border-bottom:1px solid var(--line);padding:7px 10px;text-align:left;vertical-align:top}
.tbl thead th{font-size:12px;letter-spacing:.05em;text-transform:uppercase;color:var(--ink-soft);border-bottom:2px solid var(--line)}
.tbl td.n{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}

/* steps */
ol.steps{padding-left:0;list-style:none;counter-reset:st}
ol.steps li{counter-increment:st;position:relative;padding:12px 14px 12px 54px;margin:10px 0;background:#fff;border:1px solid var(--line);border-radius:10px}
ol.steps li::before{content:counter(st);position:absolute;left:14px;top:12px;width:28px;height:28px;border-radius:50%;background:var(--top2);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:14px}

/* check lists */
ul.checks{list-style:none;padding-left:0}
ul.checks li{position:relative;padding-left:30px;margin:8px 0}
ul.checks li::before{position:absolute;left:0;top:3px;width:20px;height:20px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700}
ul.checks li.yes::before{content:"✓";background:#dff3e4;color:#1d7a3a}
ul.checks li.no::before{content:"×";background:#fde6e6;color:#b23b3b;font-size:14px}
ul.checks li.half::before{content:"½";background:#fdf1e3;color:#7a3e00}

/* causes */
.causes{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:10px 0 18px}
.causes > div{border:1px solid var(--line);border-left:4px solid var(--c,#c62828);border-radius:8px;padding:10px 13px;background:#fff}
.causes h3{font-size:15px;margin:0 0 3px}
.causes p{margin:0;font-size:13.5px;line-height:1.5;color:#3d4a59}
.causes .grp{grid-column:1/-1;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft);margin:8px 0 -2px;border:none;padding:0;background:none}

/* references */
.cite{font-size:12px;vertical-align:super;line-height:0;white-space:nowrap}
.cite a{text-decoration:none;color:var(--a);font-weight:600}
ol.refs{font-size:13.5px;line-height:1.5;padding-left:26px}
ol.refs li{margin:6px 0}
ol.refs li:target{background:#fff8e1;border-radius:4px}
ol.refs .j{color:var(--ink-soft)}
.refcount{display:grid;grid-template-columns:repeat(auto-fit,minmax(104px,1fr));gap:10px;margin:8px 0 20px}
.refcount > div{background:#f7f9fb;border:1px solid var(--line);border-radius:10px;padding:10px 12px;text-align:center}
.refcount b{display:block;font-size:26px;line-height:1.1;font-variant-numeric:tabular-nums}
.refcount span{font-size:12.5px;color:var(--ink-soft)}
.refcount > div.total{background:var(--a-soft);border-color:#bcd0ea}
.refcount > div.total b{color:var(--a)}
.reftabs{display:flex;flex-wrap:wrap;gap:6px;margin:4px 0 10px}
.reftabs button{appearance:none;font:inherit;font-size:13px;font-weight:600;padding:5px 12px;border-radius:14px;border:1px solid var(--line);background:#fff;color:var(--ink-soft);cursor:pointer}
.reftabs button.on{background:var(--top2);border-color:var(--top2);color:#fff}

/* simple figure */
.fig{margin:14px 0 22px;background:#f7f9fb;border:1px solid var(--line);border-radius:10px;padding:14px;text-align:center}
.fig svg{max-width:100%;height:auto}
.fig figcaption{font-size:13px;color:var(--ink-soft);margin-top:8px}
.pager{display:flex;justify-content:space-between;gap:10px;margin-top:40px;padding-top:16px;border-top:1px solid var(--line);font-size:14px}
.pager a{text-decoration:none;font-weight:600}

@media (max-width:900px){
  .be-wrap{flex-direction:column}
  .be-menu{position:static;width:auto;flex-direction:row;overflow-x:auto;padding:10px 12px 0;gap:4px}
  .be-menu .mhd{display:none}
  .be-menu a{white-space:nowrap;border-left:none;border-bottom:3px solid transparent;border-radius:6px 6px 0 0}
  .be-menu a.sub{padding-left:14px}
  .be-menu a.on{border-bottom-color:var(--a)}
  .be-body{border:none}
  .be-sec{padding:24px 16px 60px}
  .be-sec h1{font-size:26px}
  .facts,.cards,.cards.three,.causes{grid-template-columns:1fr 1fr}
}
@media (max-width:520px){
  .facts,.cards,.cards.three,.causes{grid-template-columns:1fr}
}
ol.refs li.flash{animation:refFlash 1.6s ease-out}
@keyframes refFlash{from{background:#ffe9a8}to{background:transparent}}

/* ---------------------------------------------------------------- Fold Proteins extras */
.be-sec .fig img{max-width:100%;height:auto}
.be-sec .pics{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:10px 0 18px}
.be-sec .pics figure{margin:0;background:#f7f9fb;border:1px solid var(--line);border-radius:10px;padding:12px 10px 8px;text-align:center}
.be-sec .pics img{height:84px;width:auto;max-width:100%;mix-blend-mode:multiply}
.be-sec .pics figcaption{font-size:12.5px;color:var(--ink-soft);margin-top:6px;line-height:1.35}
.be-sec .aa-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:8px;margin:8px 0 18px}
.be-sec .aa-grid > div{border:1px solid var(--line);border-left:4px solid var(--c,#999);border-radius:8px;padding:7px 10px;font-size:13px;line-height:1.35;background:#fff}
.be-sec .aa-grid b{display:block;font-size:14px}
.be-sec .aa-grid small{color:var(--ink-soft)}
.be-sec code{font-size:.92em;background:#f1f3f6;padding:1px 5px;border-radius:4px}
.be-sec .seq{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;letter-spacing:.06em;word-break:break-all;background:#f7f9fb;border:1px solid var(--line);border-radius:8px;padding:8px 12px;margin:0 0 14px}

/* ---------------------------------------------------------------- the app's toolbar inside the top bar (v1.26.1) */
.be-tld{font-size:12px;font-weight:600;color:var(--energy);margin-left:1px;letter-spacing:0}
.aa-tb{flex:1 1 auto;min-width:0;display:flex;align-items:center;justify-content:center;gap:0;margin:0 10px}
.aa-tb .aa-tb-sec{display:flex;align-items:center;gap:8px;padding:0 14px;min-height:34px}
.aa-tb .aa-tb-sec + .aa-tb-sec{border-left:1px solid rgba(255,255,255,.18)}
.aa-tb .aa-pf{display:flex;flex-direction:row;align-items:center;gap:7px;margin:0}
.aa-tb .aa-pf-l,.aa-tb .aa-tabs > .aa-pf-l{font-size:10.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--top-ink);line-height:1}
.aa-tb .aa-pane-prot{max-width:300px;min-width:160px;height:28px;padding:2px 6px;font-size:12.5px;font-weight:600;color:var(--ink);background:#fff;border:1px solid rgba(0,0,0,.25);border-radius:6px}
.aa-tb .aa-tb-choose{margin:0 !important;height:28px;padding:0 14px !important;font-size:12px !important;font-weight:700;border-radius:6px;background:#1e88e5 !important;color:#fff !important;border:1px solid #1e88e5 !important}
.aa-tb .aa-tb-choose:hover{background:#1976d2 !important}
.aa-tb .aa-tabs{display:flex;flex-direction:row;align-items:center;gap:7px;margin:0}
.aa-tb .aa-tabs .aa-seg{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.28);border-radius:6px;padding:2px;display:flex;gap:2px}
.aa-tb .aa-tabs .aa-seg button{padding:3px 11px;font-size:12px;font-weight:650;color:#fff;background:transparent;border:0;border-radius:4px;cursor:pointer}
.aa-tb .aa-tabs .aa-seg button:hover{background:rgba(255,255,255,.14)}
.aa-tb .aa-tabs .aa-seg button.is-on,.aa-tb .aa-tabs .aa-seg button[aria-pressed="true"]{background:#fff;color:var(--top)}
.aa-tb .aa-tb-clearbtn{width:auto;flex:none;height:28px;padding:0 13px;margin:0;font-size:12px;font-weight:650;color:#fff !important;background:rgba(255,255,255,.07) !important;border:1px solid rgba(255,255,255,.28) !important;border-radius:6px;cursor:pointer}
.aa-tb .aa-tb-clearbtn:hover{background:rgba(255,255,255,.16) !important;border-color:#ff8a80 !important;color:#ffd6d2 !important}
@media (max-width:1000px){
  .aa-tb{order:3;flex-basis:100%;justify-content:flex-start;margin:0;min-height:44px;border-top:1px solid rgba(255,255,255,.08);overflow-x:auto}
}

/* ---------------------------------------------------------------- educational-use notice under the top bar (v1.26.7) */
.fp-disc{flex:none;display:flex;align-items:center;gap:12px;padding:8px 14px 8px 16px;background:#fff3c4;border-bottom:1px solid #ecd27a;color:#4d3b00;font-size:13.5px;line-height:1.4;position:relative;z-index:4}
.fp-disc[hidden]{display:none}
.fp-disc p{margin:0;flex:1;min-width:0}
.fp-disc a{color:#6b4e00;font-weight:600;white-space:nowrap}
.fp-disc-ico{flex:none;width:22px;height:22px;border-radius:50%;background:#d99a00;color:#fff;font:800 13px/22px system-ui,sans-serif;text-align:center}
.fp-disc-x{flex:none;width:30px;height:30px;border-radius:50%;border:none;background:transparent;color:#6b5200;font-size:22px;line-height:1;cursor:pointer}
.fp-disc-x:hover{background:rgba(0,0,0,.08)}
@media (max-width:520px){.fp-disc{font-size:12.5px;padding:7px 8px 7px 12px}}