/* 4AB Symmetry Lab — page design (3 Oct 2026).
   Same design language as /spiritual/gods/ (deep header, serif + gold hero, overlapping strip,
   white rounded cards on a soft grey page) in the chemistry navy. Everything is prefixed sl-
   so hub-shell's own rules never collide with it. */
:root{
  --sl-bg:#f3f4f8;--sl-card:#fff;--sl-ink:#1d2440;--sl-navy:#1B2A5E;--sl-muted:#5F6F87;--sl-line:#e3e7f0;
  --sl-deep:#0c1430;--sl-deep2:#16224f;--sl-blue:#2f5fd0;--sl-blue2:#4b7bec;--sl-gold:#e9bd6a;--sl-gold-deep:#b98a2e;
  --sl-soft:#eef3fd;--sl-warm:#fff7e3;--sl-ok:#17794a;--sl-bad:#b42318;
  --sl-r-sm:10px;--sl-r-md:14px;--sl-r-lg:20px;
  --sl-shadow:0 6px 22px rgba(16,24,58,.07);--sl-shadow-pop:0 22px 48px rgba(16,24,58,.18);
  --sl-serif:Georgia,"Times New Roman",serif;--sl-ui:system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans",sans-serif;
}
.sl,.sl *,.sl *::before,.sl *::after{box-sizing:border-box}
body.sl-body{margin:0;background:var(--sl-bg);color:var(--sl-ink);font-family:var(--sl-ui);line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:hidden}
.sl h1,.sl h2,.sl h3,.sl h4,.sl p{margin:0}
.sl a{color:inherit}
.sl button{font:inherit;cursor:pointer;color:inherit}
.sl sub{font-size:.72em;line-height:0}
.sl :focus{outline:none}
.sl :focus-visible{outline:3px solid var(--sl-blue2);outline-offset:2px;border-radius:6px}
.sl-wrap{max-width:1440px;margin:0 auto;padding:0 20px}
.sl-sr{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.sl-skip{position:absolute;left:-999px;top:0;background:var(--sl-ink);color:#fff;padding:10px 16px;border-radius:0 0 10px 0;z-index:100;text-decoration:none}
.sl-skip:focus{left:0}
@media (prefers-reduced-motion:reduce){.sl *,.sl *::before,.sl *::after{animation-duration:.001ms!important;transition-duration:.001ms!important}}

/* ---------- header ---------- */
.sl-head{position:sticky;top:0;z-index:40;background:rgba(12,20,48,.96);backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.07);color:#fff}
.sl-head .sl-bar{display:flex;align-items:center;gap:18px;padding:10px 20px;max-width:1440px;margin:0 auto;position:relative}
.sl-brand{display:flex;align-items:center;gap:11px;font-family:var(--sl-serif);font-weight:700;font-size:16px;letter-spacing:.02em;color:#f4ecdf;text-decoration:none}
.sl-brand .m{width:42px;height:42px;flex:none;border-radius:50%;background:radial-gradient(circle at 32% 28%,#f6dfae,var(--sl-gold) 55%,var(--sl-gold-deep));display:block;text-align:center;line-height:42px;color:#22190a;font:700 15px var(--sl-serif);box-shadow:0 4px 12px rgba(0,0,0,.35),inset 0 1px 2px rgba(255,255,255,.5)}
.sl-brand small{display:block;font-family:var(--sl-ui);font-weight:600;letter-spacing:.14em;font-size:9.5px;color:#b9c4e6;text-transform:uppercase}
.sl-nav{display:flex;gap:2px;flex-wrap:wrap;margin-left:auto}
.sl-nav a{padding:9px 13px;border-radius:10px;font-size:13.5px;font-weight:600;color:#e6ebfa;opacity:.88;text-decoration:none}
.sl-nav a:hover,.sl-nav a:focus-visible{opacity:1;background:rgba(255,255,255,.10)}
.sl-nav a[aria-current="page"]{opacity:1;background:rgba(255,255,255,.16)}
.sl-navbtn{display:none;background:rgba(255,255,255,.1);border:0;color:#fff!important;width:44px;height:44px;border-radius:10px;font-size:18px;margin-left:auto}
@media (max-width:920px){
  .sl-nav{position:absolute;top:100%;left:0;right:0;background:#131d42;flex-direction:column;padding:8px;display:none;margin-left:0;box-shadow:var(--sl-shadow-pop)}
  .sl-nav.open{display:flex}.sl-nav a{padding:12px 14px}
  .sl-navbtn{display:grid;place-items:center}
}

/* ---------- hero ---------- */
.sl-hero{position:relative;overflow:hidden;color:#fff;background:linear-gradient(135deg,var(--sl-deep),var(--sl-deep2) 60%,#243a86);padding:34px 0 64px}
.sl-hero::before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(600px 300px at 85% 10%,rgba(233,189,106,.12),transparent 60%),radial-gradient(500px 380px at 10% 90%,rgba(75,123,236,.20),transparent 65%)}
.sl-hero .sl-wrap{position:relative;display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:28px;align-items:center}
.sl-hero h1{font-family:var(--sl-serif);font-size:clamp(34px,4.6vw,54px);line-height:1.05;font-weight:700;color:#fdfaf3;text-shadow:0 2px 24px rgba(0,0,0,.35)}
.sl-hero h1 span{background:linear-gradient(180deg,#f3d391,var(--sl-gold) 55%,#d19f45);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:var(--sl-gold)}
.sl-hero .sub{margin-top:10px;max-width:56ch;color:#cdd6f1;font-size:15.5px;line-height:1.65}
.sl-cta{display:flex;gap:10px;margin-top:20px;flex-wrap:wrap}
.sl-btn{border-radius:12px;padding:12px 20px;font-weight:700;font-size:14.5px;border:0;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;min-height:44px}
.sl-btn.pri{background:linear-gradient(135deg,var(--sl-blue2),var(--sl-blue));color:#fff;box-shadow:0 10px 26px rgba(47,95,208,.42)}
.sl-btn.pri:hover{filter:brightness(1.07)}
.sl-btn.sec{background:rgba(255,255,255,.06);color:#fff;border:1.5px solid rgba(255,255,255,.32)}
.sl-btn.sec:hover{background:rgba(255,255,255,.13)}
.sl-stats{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.sl-stat{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.15);border-radius:var(--sl-r-md);padding:12px 14px}
.sl-stat b{display:block;font:700 26px var(--sl-serif);color:var(--sl-gold);line-height:1.1}
.sl-stat span{font-size:12.5px;color:#d5dcf3}
@media (max-width:900px){.sl-hero{padding:24px 0 56px}.sl-hero .sl-wrap{grid-template-columns:1fr;gap:16px}.sl-stats{grid-template-columns:repeat(4,1fr);gap:6px}.sl-stat{padding:8px 8px}.sl-stat b{font-size:19px}.sl-stat span{font-size:11px;line-height:1.25;display:block}}
@media (max-width:520px){.sl-stats{grid-template-columns:1fr 1fr}.sl-btn{flex:1 1 auto}}

/* ---------- search strip (overlaps the hero, like the gods virtue strip) ---------- */
.sl-strip{position:relative;z-index:3;margin-top:-34px}
.sl-search{background:var(--sl-card);border-radius:var(--sl-r-lg);box-shadow:var(--sl-shadow-pop);padding:10px;display:flex;gap:8px;align-items:center;border:1px solid var(--sl-line)}
.sl-search .box{flex:1;min-width:0;display:flex;align-items:center;gap:8px;background:var(--sl-bg);border:1.5px solid transparent;border-radius:12px;padding:0 12px;min-height:48px}
.sl-search .box:focus-within{border-color:var(--sl-blue2);background:#fff}
.sl-search svg{flex:none;color:var(--sl-muted)}
.sl-search input{flex:1;min-width:0;border:0;background:none;font:16px var(--sl-ui);color:var(--sl-ink);outline:none;padding:10px 0}
.sl-search .clr{border:0;background:none;color:var(--sl-muted);font-size:20px;width:36px;height:36px;border-radius:50%;display:none}
.sl-search .clr.on{display:block}.sl-search .clr:hover{background:#e6e9f2}
.sl-search .cnt{font-size:13px;color:var(--sl-muted);white-space:nowrap;padding:0 4px}
.sl-chipbtn{border:1.5px solid var(--sl-line);background:#fff;color:var(--sl-navy);border-radius:12px;padding:0 14px;min-height:48px;font-weight:700;font-size:14px;display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
.sl-chipbtn:hover{background:var(--sl-soft)}
.sl-chipbtn .n{background:var(--sl-navy);color:#fff;border-radius:999px;font-size:11.5px;padding:1px 7px}
.sl-chipbtn.browse{display:none}
@media (max-width:640px){.sl-search{flex-wrap:wrap}.sl-search .box{flex:1 1 100%}.sl-search .cnt{order:5;flex:1 1 100%;padding:0 6px 2px}.sl-chipbtn{flex:1;justify-content:center;min-height:44px}}

/* ---------- workspace ---------- */
.sl-lab{padding:16px 0 8px}
.sl-grid{display:grid;grid-template-columns:minmax(260px,23%) minmax(0,1fr) minmax(300px,27%);gap:14px;align-items:start}
.sl-panel{background:var(--sl-card);border:1px solid var(--sl-line);border-radius:var(--sl-r-lg);box-shadow:var(--sl-shadow);overflow:hidden;min-width:0}
.sl-panel>h2,.sl-ph{font:700 15px var(--sl-serif);color:var(--sl-navy);padding:12px 14px;display:flex;align-items:center;gap:8px;border-bottom:1px solid var(--sl-line)}
.sl-ph small{font:400 12.5px var(--sl-ui);color:var(--sl-muted)}
.sl-ph .x{margin-left:auto;border:0;background:var(--sl-bg);width:40px;height:40px;border-radius:50%;font-size:20px;display:none}

/* left: browse */
.sl-side{position:sticky;top:76px;max-height:calc(100vh - 92px);display:flex;flex-direction:column}
.sl-ctl{padding:10px 12px;border-bottom:1px solid var(--sl-line);display:grid;gap:8px}
.sl-ctl label{font-size:11.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--sl-muted)}
.sl-seg{display:flex;flex-wrap:wrap;gap:4px}
.sl-seg button{border:1px solid var(--sl-line);background:#fff;border-radius:999px;padding:6px 11px;font-size:13px;font-weight:600;color:var(--sl-navy);min-height:34px}
.sl-seg button[aria-pressed="true"]{background:var(--sl-navy);border-color:var(--sl-navy);color:#fff}
.sl-chips{display:flex;flex-wrap:wrap;gap:6px;padding:8px 12px;border-bottom:1px solid var(--sl-line)}
.sl-chips:empty{display:none}
.sl-chip{display:inline-flex;align-items:center;gap:4px;background:var(--sl-soft);border:1px solid #cfdcf8;color:var(--sl-navy);border-radius:999px;padding:3px 4px 3px 10px;font-size:12.5px;font-weight:600}
.sl-chip button{border:0;background:none;width:26px;height:26px;border-radius:50%;font-size:15px;line-height:1;color:var(--sl-navy)}
.sl-chip button:hover{background:#d5e1fb}
.sl-chips .all{border:0;background:none;color:var(--sl-bad);font-size:12.5px;font-weight:700;text-decoration:underline;padding:4px 6px}
.sl-scroll{overflow:auto;flex:1;min-height:160px;overscroll-behavior:contain}
.sl-ctl .sl-chipbtn{min-height:40px;justify-self:start}
.sl-fam{border-bottom:1px solid var(--sl-line)}
.sl-fam>summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:8px;padding:10px 14px;font-weight:700;font-size:14px;color:var(--sl-ink);min-height:44px}
.sl-fam>summary::-webkit-details-marker{display:none}
.sl-fam>summary::after{content:"";width:8px;height:8px;border:solid var(--sl-muted);border-width:0 2px 2px 0;transform:rotate(45deg);transition:transform .15s;flex:none;margin-left:4px}
.sl-fam[open]>summary::after{transform:rotate(-135deg)}
.sl-fam>summary .g{font:13px var(--sl-serif);color:var(--sl-muted);font-weight:400}
.sl-fam>summary .n{margin-left:auto;font-size:12px;color:var(--sl-muted);background:var(--sl-bg);border-radius:999px;padding:2px 8px;font-weight:600}
.sl-row{display:grid;grid-template-columns:46px minmax(0,1fr);gap:0 8px;align-items:center;width:100%;text-align:left;border:0;background:none;padding:7px 12px 7px 18px;font-size:14px;border-left:3px solid transparent;min-height:44px}
.sl-row i{font:13.5px var(--sl-serif);color:var(--sl-muted);font-style:normal}
.sl-row b{font-weight:600;overflow-wrap:anywhere}
.sl-row span{display:block;font-size:12.5px;color:var(--sl-muted);grid-column:2;overflow-wrap:anywhere}
.sl-row:hover{background:#f5f6fa}
.sl-row[aria-current="true"]{background:var(--sl-soft);border-left-color:var(--sl-navy)}
.sl-row[aria-current="true"] i{color:var(--sl-navy);font-weight:700}
.sl-empty{padding:22px 16px;text-align:center;color:var(--sl-muted);font-size:14px}
.sl-empty b{display:block;color:var(--sl-ink);font-size:15px;margin-bottom:4px}
.sl-empty button{margin-top:10px;border:1.5px solid var(--sl-navy);background:#fff;color:var(--sl-navy);border-radius:10px;padding:8px 16px;font-weight:700;min-height:44px}

/* filters sheet */
.sl-filters{border-bottom:1px solid var(--sl-line);background:#fafbfe}
.sl-filters[hidden]{display:none}
.sl-fgroup{border-top:1px solid var(--sl-line)}
.sl-fgroup:first-child{border-top:0}
.sl-fgroup>summary{list-style:none;cursor:pointer;padding:9px 14px;font-size:13px;font-weight:700;color:var(--sl-navy);display:flex;align-items:center;gap:6px;min-height:40px}
.sl-fgroup>summary::-webkit-details-marker{display:none}
.sl-fgroup>summary::after{content:"+";margin-left:auto;font-size:16px;color:var(--sl-muted)}
.sl-fgroup[open]>summary::after{content:"–"}
.sl-fgroup>summary em{font-style:normal;font-weight:600;color:var(--sl-blue);font-size:12px}
.sl-fopts{display:flex;flex-wrap:wrap;gap:5px;padding:0 12px 10px}
.sl-fopts button{border:1px solid var(--sl-line);background:#fff;border-radius:8px;padding:5px 9px;font-size:13px;min-height:34px;display:inline-flex;gap:5px;align-items:center}
.sl-fopts button small{color:var(--sl-muted);font-size:11px}
.sl-fopts button[aria-pressed="true"]{background:var(--sl-navy);border-color:var(--sl-navy);color:#fff}
.sl-fopts button[aria-pressed="true"] small{color:#c9d3f2}
.sl-fopts button:disabled{opacity:.4;cursor:default}
.sl-fopts .hint{flex:1 1 100%;font-size:12px;color:var(--sl-muted)}
.sl-sheetfoot{display:none}

/* centre: stage */
.sl-stage{position:relative}
.sl-title{display:flex;align-items:center;gap:10px;padding:10px 14px;border-bottom:1px solid var(--sl-line);flex-wrap:wrap}
.sl-title h2{font:700 20px var(--sl-serif);color:var(--sl-ink);overflow-wrap:anywhere}
.sl-title .nm{flex:1 1 100%;font-size:13px;color:var(--sl-muted);order:3}
.sl-badge{display:inline-block;background:var(--sl-navy);color:#fff;border-radius:8px;padding:2px 10px;font:700 15px var(--sl-serif)}
.sl-badge.q{background:var(--sl-gold-deep)}
.sl-step{margin-left:auto;display:flex;gap:4px}
.sl-step button{border:1px solid var(--sl-line);background:#fff;width:40px;height:40px;border-radius:10px;font-size:16px;color:var(--sl-navy)}
.sl-step button:hover{background:var(--sl-soft)}
.sl-canvasbox{position:relative;background:#fff}
.sl-canvasbox canvas{display:block;width:100%;height:min(58vh,560px);min-height:320px;touch-action:none;cursor:grab}
.sl-canvasbox canvas:active{cursor:grabbing}
.sl-hint{position:absolute;left:12px;top:10px;font-size:12.5px;color:#6b7690;pointer-events:none}
.sl-pg{position:absolute;left:12px;bottom:10px;font:14px var(--sl-serif);color:var(--sl-ink);pointer-events:none;background:rgba(255,255,255,.8);border-radius:6px;padding:1px 6px}
.sl-load{position:absolute;inset:0;display:grid;place-items:center;color:var(--sl-muted);font-size:14px;background:#fff}
.sl-tools{display:flex;flex-wrap:wrap;gap:6px;padding:8px 10px;border-top:1px solid var(--sl-line);background:#f7f8fc;align-items:center}
.sl-tools button,.sl-tools select{border:1px solid rgba(27,42,94,.2);background:#fff;color:var(--sl-navy);border-radius:999px;padding:6px 12px;font-size:13px;font-weight:600;min-height:38px;white-space:nowrap}
.sl-tools button[aria-pressed="true"]{background:#dfe8fb;border-color:#9db5ee}
.sl-tools .sep{width:1px;height:22px;background:var(--sl-line);margin:0 2px}
.sl-tools .lab{font-size:12px;color:var(--sl-muted);font-weight:600}
.sl-stage:fullscreen{background:#fff;display:flex;flex-direction:column;border-radius:0}
.sl-stage:fullscreen .sl-canvasbox{flex:1}.sl-stage:fullscreen canvas{height:100%}
.sl-toast{position:fixed;left:50%;bottom:84px;transform:translateX(-50%);background:var(--sl-ink);color:#fff;border-radius:999px;padding:9px 18px;font-size:13.5px;z-index:90;box-shadow:var(--sl-shadow-pop);opacity:0;pointer-events:none;transition:opacity .2s}
.sl-toast.on{opacity:1}

/* right: info */
.sl-info{position:sticky;top:76px;max-height:calc(100vh - 92px);display:flex;flex-direction:column}
.sl-tabs{display:flex;border-bottom:1px solid var(--sl-line);overflow-x:auto;scrollbar-width:none;flex:none}
.sl-tabs::-webkit-scrollbar{display:none}
.sl-tabs button{border:0;background:none;padding:11px 12px;font-size:13px;font-weight:700;color:var(--sl-muted);border-bottom:2.5px solid transparent;white-space:nowrap;min-height:44px;flex:1 0 auto}
.sl-tabs button[aria-selected="true"]{color:var(--sl-navy);border-bottom-color:var(--sl-navy)}
.sl-tabpane{padding:12px 14px;overflow:auto;font-size:14px;flex:1}
.sl-tabpane h3{font:700 14px var(--sl-serif);color:var(--sl-navy);margin:14px 0 6px}
.sl-tabpane h3:first-child{margin-top:0}
.sl-kv{display:grid;grid-template-columns:auto minmax(0,1fr);gap:5px 12px;margin:0}
.sl-kv dt{color:var(--sl-muted);font-size:13px}.sl-kv dd{margin:0;font-weight:600;overflow-wrap:anywhere}
.sl-facts{margin:0;padding-left:18px}.sl-facts li{margin:2px 0}
.sl-note{background:var(--sl-warm);border-left:4px solid var(--sl-gold-deep);border-radius:0 10px 10px 0;padding:7px 10px;font-size:13px;margin:10px 0 0}
.sl-na{background:var(--sl-bg);border-radius:10px;padding:9px 11px;font-size:13px;color:var(--sl-muted);margin-top:10px}
.sl-elbar{display:flex;gap:6px;margin-bottom:8px;flex-wrap:wrap}
.sl-elbar button{border:1px solid var(--sl-line);background:#fff;border-radius:999px;padding:5px 12px;font-size:12.5px;font-weight:700;color:var(--sl-navy);min-height:36px}
.sl-els{display:grid;gap:5px}
.sl-els button{display:grid;grid-template-columns:22px 62px minmax(0,1fr);gap:6px;text-align:left;border:1px solid transparent;background:#f5f6fa;border-radius:9px;padding:7px 9px;font-size:13px;align-items:center;min-height:42px}
.sl-els button b{font:700 14px var(--sl-serif)}
.sl-els button span{color:var(--sl-muted);font-size:12.5px;line-height:1.3}
.sl-els button::before{content:"";width:16px;height:16px;border:1.5px solid #9aa5bd;border-radius:4px;background:#fff}
.sl-els button[aria-pressed="true"]{border-color:var(--sl-gold-deep);background:var(--sl-warm)}
.sl-els button[aria-pressed="true"]::before{background:var(--sl-navy);border-color:var(--sl-navy);box-shadow:inset 0 0 0 2.5px #fff}
.sl-cls{width:100%;border-collapse:collapse;font-size:13.5px}
.sl-cls th{font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--sl-muted);text-align:left;padding:4px 6px;border-bottom:1px solid var(--sl-line)}
.sl-cls td{padding:6px;border-bottom:1px solid #eef0f6}
.sl-dot{display:inline-block;width:14px;height:14px;border-radius:50%;border:1px solid rgba(0,0,0,.45);vertical-align:-2px;margin-right:7px}
.sl-links{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.sl-links a,.sl-links button{border:1px solid var(--sl-line);background:#fff;border-radius:999px;padding:6px 12px;font-size:13px;font-weight:600;color:var(--sl-navy);text-decoration:none;min-height:36px;display:inline-flex;align-items:center}
.sl-links a:hover,.sl-links button:hover{background:var(--sl-soft)}
/* challenge */
.sl-quiz p{margin:0 0 8px}
.sl-qopts{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:10px 0}
.sl-qopts button{border:1.5px solid var(--sl-line);background:#fff;border-radius:12px;padding:12px;font:700 17px var(--sl-serif);min-height:52px}
.sl-qopts button:hover:not(:disabled){border-color:var(--sl-blue2);background:var(--sl-soft)}
.sl-qopts button.ok{border-color:var(--sl-ok);background:#e7f6ee;color:var(--sl-ok)}
.sl-qopts button.no{border-color:var(--sl-bad);background:#fdecea;color:var(--sl-bad)}
.sl-qres{font-weight:700;margin:6px 0}.sl-qres.ok{color:var(--sl-ok)}.sl-qres.no{color:var(--sl-bad)}
.sl-qbar{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:10px}
.sl-qbar .score{font-size:13px;color:var(--sl-muted);margin-left:auto}
.sl-btn2{border:0;border-radius:10px;background:var(--sl-navy);color:#fff!important;padding:9px 16px;font-weight:700;font-size:14px;min-height:42px;text-decoration:none;display:inline-flex;align-items:center}
.sl-btn2.ghost{background:#fff;color:var(--sl-navy)!important;border:1.5px solid var(--sl-navy)}

/* ---------- learn + about ---------- */
.sl-sec{padding:26px 0 6px}
.sl-sec>.sl-wrap>h2{font:700 24px var(--sl-serif);color:var(--sl-ink);margin-bottom:12px}
.sl-cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.sl-card{background:var(--sl-card);border:1px solid var(--sl-line);border-radius:var(--sl-r-lg);box-shadow:var(--sl-shadow);padding:16px;display:flex;flex-direction:column;gap:6px;text-decoration:none;text-align:left;font:inherit}
button.sl-card{cursor:pointer}
.sl-card:hover{box-shadow:var(--sl-shadow-pop);transform:translateY(-2px);transition:.15s}
.sl-card .ic{width:44px;height:44px;border-radius:12px;background:var(--sl-soft);color:var(--sl-navy);display:block;text-align:center;line-height:44px;white-space:nowrap;font:700 16px var(--sl-serif)}
.sl-card h3{font:700 16.5px var(--sl-serif);color:var(--sl-ink)}
.sl-card p{font-size:13.5px;color:var(--sl-muted)}
.sl-card .go{margin-top:auto;font-size:13px;font-weight:700;color:var(--sl-blue)}
.sl-about{background:var(--sl-card);border:1px solid var(--sl-line);border-radius:var(--sl-r-lg);padding:18px 20px;box-shadow:var(--sl-shadow);font-size:14.5px;color:#39425e}
.sl-about p+p{margin-top:8px}
.sl-about ol{margin:8px 0 0;padding-left:20px}.sl-about li{margin:3px 0}
.sl-about a{color:var(--sl-blue);font-weight:600}
.sl-foot{padding:18px 0 30px;font-size:13px;color:var(--sl-muted)}
.sl-foot a{color:var(--sl-blue)}
.ab-credit{border-top:1px solid rgba(233,192,121,.22);padding:14px 16px;text-align:center;background:#0f1524;color:#c9d0ea;font-size:12.5px}
.ab-credit b,.ab-credit a{color:#e9c079;text-decoration:none;font-weight:700}

/* ---------- point-group pages ---------- */
.sl-crumb{font-size:13px;color:#cdd6f1;margin-bottom:8px}
.sl-crumb a{color:#fff;text-decoration:underline}
.sl-hero.small{padding:24px 0 30px}
.sl-hero.small .sl-wrap{display:block}
.sl-pgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px}
.sl-pcard{background:#fff;border:1px solid var(--sl-line);border-radius:var(--sl-r-md);padding:14px;text-decoration:none;box-shadow:var(--sl-shadow);display:block}
.sl-pcard:hover{box-shadow:var(--sl-shadow-pop)}
.sl-pcard b{font:700 22px var(--sl-serif);color:var(--sl-navy);display:block}
.sl-pcard span{font-size:13px;color:var(--sl-muted);display:block}
.sl-famh{font:700 18px var(--sl-serif);margin:22px 0 10px;color:var(--sl-ink)}
.sl-famh small{font:400 13.5px var(--sl-ui);color:var(--sl-muted)}
.sl-tscroll{overflow-x:auto;background:#fff;border:1px solid var(--sl-line);border-radius:var(--sl-r-md);box-shadow:var(--sl-shadow)}
.sl-table{width:100%;border-collapse:collapse;font-size:14px}
.sl-table th,.sl-table td{text-align:left;padding:9px 12px;border-bottom:1px solid #eef0f6;vertical-align:top}
.sl-table th{background:#f5f6fa;font-size:11.5px;text-transform:uppercase;letter-spacing:.05em;color:var(--sl-muted)}
.sl-table td small{display:block;color:var(--sl-muted);font-size:12.5px}
.sl-table a{color:var(--sl-blue);font-weight:700;text-decoration:none}
.sl-table a:hover{text-decoration:underline}

/* ---------- tablet ---------- */
@media (max-width:1180px){
  .sl-grid{grid-template-columns:minmax(250px,32%) minmax(0,1fr)}
  .sl-info{grid-column:2;position:static;max-height:none}
  .sl-side{grid-row:1 / span 2}
  .sl-cards{grid-template-columns:repeat(2,minmax(0,1fr))}
  .sl-canvasbox canvas{height:min(50vh,480px)}
}
/* ---------- phone: the browse panel becomes a full-screen sheet ---------- */
@media (max-width:820px){
  .sl-wrap{padding:0 12px}
  .sl-grid{grid-template-columns:minmax(0,1fr);gap:10px}
  .sl-info{grid-column:auto}
  .sl-chipbtn.browse{display:inline-flex}
  .sl-side{position:fixed;inset:0;z-index:80;max-height:none;border-radius:0;border:0;display:none;grid-row:auto}
  .sl-side.open{display:flex}
  .sl-ph .x{display:block}
  .sl-sheetfoot{display:flex;gap:8px;padding:10px 12px;border-top:1px solid var(--sl-line);background:#fff}
  .sl-sheetfoot button{flex:1;min-height:46px;border-radius:12px;font-weight:700;border:1.5px solid var(--sl-navy);background:#fff;color:var(--sl-navy)}
  .sl-sheetfoot button.go{background:var(--sl-navy);color:#fff}
  body.sl-lock{overflow:hidden}
  .sl-canvasbox canvas{height:46vh;min-height:300px}
  .sl-tools{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;padding-right:26px;-webkit-mask-image:linear-gradient(90deg,#000 calc(100% - 26px),transparent);mask-image:linear-gradient(90deg,#000 calc(100% - 26px),transparent)}
  .sl-tools::-webkit-scrollbar{display:none}
  .sl-tools button{min-height:42px;flex:none}
  .sl-title h2{font-size:18px}
  .sl-cards{grid-template-columns:minmax(0,1fr)}
  .sl-sec>.sl-wrap>h2{font-size:20px}
  .sl-fopts button,.sl-seg button{min-height:40px}
  .sl-els button{min-height:46px}
}
@media (min-width:1800px){.sl-canvasbox canvas{height:min(62vh,700px)}}

.sl-lab,.sl-stage,.sl-sec{scroll-margin-top:72px}
/* hub-shell runs "one menu" on phones: its drawer already lists this page nav, so ours steps aside */
@media (max-width:920px){html.hs-onemenu .sl-navbtn,html.hs-onemenu .sl-nav{display:none!important}}

/* ---------- 3 Oct, owner: "main thing below the menu, everything in one window, no scrolling" ----------
   The tall hero is gone: title, counts, search and actions are one bar, and on a desktop the three
   panels fill exactly the rest of the window (--sl-top is measured by lab.js). */
.sl-top{background:linear-gradient(135deg,var(--sl-deep),var(--sl-deep2) 60%,#243a86);padding:10px 0}
.sl-top .sl-search{box-shadow:none;border:0;padding:8px 10px;border-radius:16px}
.sl-h{padding:0 8px 0 4px;white-space:nowrap}
.sl-h h1{font:700 22px/1.1 var(--sl-serif);color:var(--sl-navy)}
.sl-h h1 span{color:var(--sl-gold-deep)}
.sl-h p{font-size:11.5px;color:var(--sl-muted);line-height:1.3}
.sl-h p b{color:var(--sl-ink)}
.sl-chipbtn.gold{background:var(--sl-navy);border-color:var(--sl-navy);color:#fff}
.sl-chipbtn.gold:hover{background:#24377a}
.sl-top .sl-search .box,.sl-top .sl-chipbtn{min-height:44px}
.sl-lab{padding:10px 0 8px}
@media (min-width:1181px){
  .sl-grid{height:calc(100vh - var(--sl-top,150px) - 10px);min-height:430px;align-items:stretch;gap:10px}
  .sl-side,.sl-info{position:static;max-height:none;height:100%}
  .sl-stage{display:flex;flex-direction:column;height:100%}
  .sl-canvasbox{flex:1;min-height:0}
  .sl-canvasbox canvas{position:absolute;inset:0;height:100%;min-height:0}
  .sl-title{padding:7px 12px}.sl-title h2{font-size:18px}
  .sl-title .nm{flex:1 1 auto;order:0;font-size:12.5px}
  .sl-step button{width:34px;height:34px}
  .sl-tools{gap:4px;padding:6px 8px}
  .sl-tools button{min-height:30px;padding:4px 9px;font-size:12px}
  .sl-tools .lab{font-size:11px}
  .sl-ph{padding:9px 12px}.sl-ctl{padding:8px 10px;gap:6px}
  .sl-seg button{min-height:30px;padding:4px 9px;font-size:12.5px}
  .sl-ctl .sl-chipbtn{min-height:32px;font-size:13px}
  .sl-fam>summary{min-height:38px;padding:7px 12px}
  .sl-row{min-height:38px;padding:5px 10px 5px 14px}
  .sl-tabs button{min-height:38px;padding:8px 10px}
}
@media (max-width:820px){
  .sl-h{flex:1 1 100%;display:flex;align-items:baseline;gap:10px;padding:2px 6px}
  .sl-canvasbox canvas{height:42vh;min-height:280px}
}

/* full screen: the stage is the whole screen, the canvas takes what the title and tool rows leave */
.sl-stage:fullscreen{width:100vw;height:100vh;max-height:none;display:flex;flex-direction:column;border:0;border-radius:0;overflow:hidden}
.sl-stage:fullscreen .sl-title,.sl-stage:fullscreen .sl-tools{flex:none}
.sl-stage:fullscreen .sl-canvasbox{flex:1 1 0;min-height:0;position:relative}
.sl-stage:fullscreen .sl-canvasbox canvas{position:absolute;inset:0;width:100%;height:100%;min-height:0}
.sl-stage:fullscreen .sl-tools{flex-wrap:wrap;overflow:visible;-webkit-mask-image:none;mask-image:none}
/* same layout as a class: used where the browser has no fullscreen API (iPhone) */
.sl-stage.sl-fs{width:100vw;height:100vh;max-height:none;display:flex;flex-direction:column;border:0;border-radius:0;overflow:hidden}
.sl-stage.sl-fs .sl-title,.sl-stage.sl-fs .sl-tools{flex:none}
.sl-stage.sl-fs .sl-canvasbox{flex:1 1 0;min-height:0;position:relative}
.sl-stage.sl-fs .sl-canvasbox canvas{position:absolute;inset:0;width:100%;height:100%;min-height:0}
.sl-stage.sl-fs .sl-tools{flex-wrap:wrap;overflow:visible;-webkit-mask-image:none;mask-image:none}
.sl-stage.sl-fs{position:fixed;inset:0;z-index:200;background:#fff}

/* "Group molecules by" as a drop-down (owner, 3 Oct), Filters beside it */
.sl-byrow{display:flex;gap:8px;align-items:stretch}
.sl-by{flex:1;min-width:0;display:block;background:var(--sl-bg);border:1.5px solid var(--sl-line);border-radius:10px;padding:4px 10px 3px;position:relative}
.sl-by:focus-within{border-color:var(--sl-blue2);background:#fff}
.sl-by span{display:block;font-size:10.5px!important;letter-spacing:.05em;text-transform:uppercase;font-weight:700;color:var(--sl-muted)}
.sl-by select{width:100%;border:0;background:transparent;font:600 14.5px var(--sl-ui);color:var(--sl-ink);padding:1px 0 2px;outline:none;cursor:pointer;min-height:24px}
.sl-byrow .sl-chipbtn{min-height:0!important;border-radius:10px;justify-self:auto}
@media (max-width:820px){.sl-by select{font-size:16px;min-height:30px}}

/* ---------- 3 Oct, owner: "item categorisation, size and colour combination" ----------
   Toolbar = four labelled groups of joined buttons, one active colour (navy). Info = short tabs that
   all fit, small-caps section heads, one row per fact with a hairline, calm value weight. */
.sl-tools{gap:6px 14px!important;padding:8px 12px!important;background:#f7f8fc;align-items:flex-end}
.sl-tg{display:flex;flex-direction:column;gap:3px;flex:none}
.sl-tg.end{margin-left:auto}
.sl-tg .lab{font-size:10px!important;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--sl-muted);padding-left:2px}
.sl-tg .seg{display:flex;border:1px solid #c9d2e6;border-radius:9px;overflow:hidden;background:#fff}
.sl-tools .sl-tg button{border:0;border-radius:0;border-left:1px solid #dfe4f0;background:#fff;color:var(--sl-navy);padding:0 11px;min-height:32px;font-size:12.5px;font-weight:600}
.sl-tools .sl-tg button:first-child{border-left:0}
.sl-tools .sl-tg button:hover{background:var(--sl-soft)}
.sl-tools .sl-tg button[aria-pressed="true"]{background:var(--sl-navy);color:#fff;border-left-color:var(--sl-navy)}
.sl-tools .sl-tg button:focus-visible{outline-offset:-3px}
@media (max-width:820px){.sl-tools{gap:10px!important}.sl-tools .sl-tg button{min-height:40px;padding:0 13px;font-size:13px}.sl-tg.end{margin-left:0}}

.sl-grid{grid-template-columns:minmax(250px,22%) minmax(0,1fr) minmax(340px,27%)}
@media (max-width:1180px){.sl-grid{grid-template-columns:minmax(250px,32%) minmax(0,1fr)}}
@media (max-width:820px){.sl-grid{grid-template-columns:minmax(0,1fr)}}
.sl-tabs{background:#f7f8fc}
.sl-tabs button{flex:1 1 0;padding:9px 4px!important;font-size:12.5px;font-weight:600;color:var(--sl-muted)}
.sl-tabs button[aria-selected="true"]{background:#fff;color:var(--sl-navy);font-weight:700}
.sl-tabpane{padding:12px 14px 14px;font-size:13.5px;color:var(--sl-ink)}
.sl-tabpane h3{font:700 10.5px var(--sl-ui);letter-spacing:.09em;text-transform:uppercase;color:var(--sl-gold-deep);margin:16px 0 4px;padding-bottom:5px;border-bottom:2px solid var(--sl-line)}
.sl-kv{grid-template-columns:42% minmax(0,1fr);gap:0}
.sl-kv dt,.sl-kv dd{padding:6px 0;border-bottom:1px solid #eef0f6;font-size:13.5px;line-height:1.4}
.sl-kv dt{color:var(--sl-muted);font-size:12.5px;padding-right:10px}
.sl-kv dd{font-weight:500;color:var(--sl-ink)}
.sl-kv dt:last-of-type,.sl-kv dd:last-of-type{border-bottom:0}
.sl-kv dd small{display:block;font-size:11.5px;color:var(--sl-muted);font-weight:400;margin-top:2px}
.sl-pgl{display:inline-block;background:var(--sl-navy);color:#fff!important;border-radius:6px;padding:0 8px;font:700 13.5px var(--sl-serif);text-decoration:none}
.sl-yn{display:inline-block;border-radius:999px;padding:1px 10px;font-size:12px;font-weight:700}
.sl-yn.y{background:#e2f4ea;color:var(--sl-ok)}
.sl-yn.n{background:#eceff5;color:#4d5873}
.sl-facts{margin-top:6px;font-size:13px;color:#39425e}
.sl-cls{font-size:13px}.sl-cls td{padding:6px}
.sl-na{font-size:12px;line-height:1.45;border-left:3px solid #cfd6e6;border-radius:0 8px 8px 0}
.sl-note{font-size:12.5px}
.sl-links a,.sl-links button{font-size:12.5px;min-height:32px;padding:4px 12px}
.sl-els button{font-size:12.5px}

/* no second focus box inside the drop-down (the field itself shows focus); share buttons sit in the title row */
.sl .sl-by select:focus,.sl .sl-by select:focus-visible{outline:none}
.sl-titlerow{display:flex;align-items:center;gap:8px;border-bottom:1px solid var(--sl-line);padding-right:10px;flex-wrap:wrap}
.sl-titlerow .sl-title{flex:1 1 260px;min-width:0;border-bottom:0}
.sl-tg.share{flex:none}
.sl-tg.share .seg button{border:0;border-left:1px solid #dfe4f0;background:#fff;color:var(--sl-navy);padding:0 10px;min-height:32px;font-size:12.5px;font-weight:600}
.sl-tg.share .seg button:first-child{border-left:0}
.sl-tg.share .seg button:hover{background:var(--sl-soft)}
.sl-stage:fullscreen .sl-titlerow,.sl-stage.sl-fs .sl-titlerow{flex:none}
@media (max-width:820px){.sl-titlerow{padding:0 10px 8px}.sl-tg.share .seg button{min-height:40px;padding:0 14px}}

/* narrower desktops (1181–1560px incl. the site rail): give the viewer the width, keep title and tools on one row each */
@media (min-width:1181px) and (max-width:1560px){
  .sl-grid{grid-template-columns:232px minmax(0,1fr) 304px}
  .sl-tools{gap:6px 8px!important;padding:7px 8px!important}
  .sl-tools .sl-tg button{padding:0 7px;font-size:12px}
  .sl-tg.share .seg button{padding:0 7px;font-size:12px}
  .sl-tabs button{font-size:11.5px}
}
@media (min-width:1181px){
  .sl-titlerow{flex-wrap:nowrap}
  .sl-titlerow .sl-title{flex:1 1 0;flex-wrap:nowrap}
  .sl-title h2{white-space:nowrap}
  .sl-title .nm{flex:1 1 0;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .sl-step{margin-left:0;flex:none}
}
@media (min-width:1181px) and (max-width:1560px){
  .sl-tools{flex-wrap:nowrap!important;gap:6px!important;padding:7px 6px!important}
  .sl-tools .sl-tg button{padding:0 6px;font-size:11.5px;white-space:nowrap}
  .sl-tabs button{font-size:11px;padding:9px 2px!important}
}
@media (min-width:1181px) and (max-width:1330px){.sl-tools{flex-wrap:wrap!important}}

/* Operations tab: one drop-down per kind of element (owner, 3 Oct) */
.sl-ops{font-size:13px;line-height:1.5;margin-bottom:8px!important;color:#39425e}
.sl-ops b{display:block;font:700 10.5px var(--sl-ui);letter-spacing:.09em;text-transform:uppercase;color:var(--sl-gold-deep)}
.sl-elbar{margin-bottom:10px}
.sl-elbar button{min-height:30px;padding:3px 12px;font-size:12px;border-color:#c9d2e6}
.sl-og{border:1px solid var(--sl-line);border-radius:10px;margin-bottom:6px;background:#fff;overflow:hidden}
.sl-og>summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:8px;padding:6px 8px 6px 12px;min-height:40px;background:#f7f8fc}
.sl-og>summary::-webkit-details-marker{display:none}
.sl-og>summary::before{content:"";width:7px;height:7px;border:solid var(--sl-muted);border-width:0 2px 2px 0;transform:rotate(-45deg);transition:transform .15s;flex:none}
.sl-og[open]>summary::before{transform:rotate(45deg)}
.sl-og>summary b{font:700 15px var(--sl-serif);color:var(--sl-navy)}
.sl-og>summary .k{font-size:12px;color:var(--sl-muted)}
.sl-og>summary .n{margin-left:auto;font-size:11.5px;font-weight:700;color:var(--sl-navy);background:#e6ebf7;border-radius:999px;padding:1px 8px}
.sl-og>summary .tg{border:1px solid #c9d2e6;background:#fff;color:var(--sl-navy);border-radius:999px;font-size:11.5px;font-weight:700;padding:2px 10px;min-height:28px}
.sl-og>summary .tg[aria-pressed="true"]{background:var(--sl-navy);border-color:var(--sl-navy);color:#fff}
.sl-og .sl-els{padding:6px;gap:4px;border-top:1px solid var(--sl-line)}
.sl-og .sl-els button{grid-template-columns:18px 58px minmax(0,1fr);min-height:36px;padding:5px 8px;background:#fff;border-color:#eef0f6}
.sl-og .sl-els button b{font-size:13px}
.sl-og .sl-els button span{font-size:12px}
@media (max-width:820px){.sl-og>summary{min-height:46px}.sl-og>summary .tg{min-height:36px;padding:4px 14px}.sl-og .sl-els button{min-height:44px}}

/* brand mark: Cn sits in the middle of the gold disc */
.sl-brand .m{display:grid!important;place-items:center;line-height:1!important;padding:0}
.sl-brand .m>span{display:block;line-height:1;transform:translate(1px,-1px);white-space:nowrap}
.sl-brand .m sub{font-size:.7em;vertical-align:-0.25em;line-height:0}

/* play an operation / look along an element (3 Oct) */
.sl-er{display:grid;grid-template-columns:minmax(0,1fr) 34px 34px;gap:4px;align-items:stretch}
.sl-er .ic{display:grid!important;place-items:center;grid-template-columns:none!important;padding:0!important;min-height:36px;border:1px solid #dfe4f0!important;background:#fff!important;border-radius:9px;color:var(--sl-navy)}
.sl-er .ic::before{display:none!important}
.sl-er button.ic:hover{background:var(--sl-navy)!important;color:#fff;border-color:var(--sl-navy)!important}
.sl-er .ic.off{border-style:dashed!important;opacity:.35}
.sl-anim{position:absolute;left:12px;right:12px;bottom:4px;width:calc(100% - 24px);margin:0;accent-color:var(--sl-bad);height:18px;cursor:pointer}
.sl-anim[hidden],.sl-animl[hidden]{display:none}
.sl-animl{position:absolute;right:12px;bottom:26px;font:700 13px var(--sl-serif);color:var(--sl-bad);background:rgba(255,255,255,.85);border-radius:6px;padding:1px 7px;pointer-events:none}
.sl-pg{bottom:26px}
@media (max-width:820px){.sl-er{grid-template-columns:minmax(0,1fr) 44px 44px}.sl-er .ic{min-height:44px}}

.sl-tools .sl-tg button:disabled{opacity:.4;cursor:default;background:#f2f4f9!important;color:var(--sl-muted)!important}
@media (min-width:1181px) and (max-width:1450px){.sl-tools{flex-wrap:wrap!important}}

/* Operations tab: group by element or by point-group class (8 Oct) */
.sl-opby{display:block;background:var(--sl-bg);border:1.5px solid var(--sl-line);border-radius:10px;padding:4px 10px 3px;margin:0 0 10px}
.sl-opby:focus-within{border-color:var(--sl-blue2);background:#fff}
.sl-opby span{display:block;font-size:10.5px;letter-spacing:.05em;text-transform:uppercase;font-weight:700;color:var(--sl-muted)}
.sl-opby select{width:100%;border:0;background:transparent;font:600 14px var(--sl-ui);color:var(--sl-ink);padding:1px 0 2px;outline:none;cursor:pointer}
.sl-clsrows{gap:5px}
.sl-clsrows button[data-cls] b{font-size:14px}

.sl-side.flash{box-shadow:0 0 0 3px var(--sl-gold),var(--sl-shadow-pop);transition:box-shadow .3s}