/* chem/_engine/chem-ui.css — shared chemistry workspace (Scribbler panel · Formulas hub · tools) */
.chem{--navy:#16294a;--navy2:#2c4478;--gold:#F5A623;--gold2:#e8941e;--teal:#0ea5a4;--ink:#1b2333;--mute:#5c6b86;--line:#d8e1ee;--paper:#f6f8fc;
  font-family:Poppins,system-ui,sans-serif;color:var(--ink);display:flex;flex-direction:column;min-height:0;height:100%;background:#fff;font-size:13px;position:relative}
.chem *{box-sizing:border-box}
.chem button{font-family:inherit}
.chem-bar{display:flex;align-items:center;gap:6px;padding:6px 8px;border-bottom:1px solid var(--line);background:var(--paper);flex:none;flex-wrap:wrap}
.chem-tabs{display:flex;gap:2px;flex:1;min-width:0;overflow-x:auto;scrollbar-width:none}
.chem-tab{border:0;background:transparent;color:var(--mute);font-weight:700;font-size:12.5px;padding:6px 10px;border-radius:9px;cursor:pointer;white-space:nowrap}
.chem-tab.on{background:var(--navy);color:#fff}
.chem-tab:hover:not(.on){background:rgba(43,68,120,.08);color:var(--navy)}
.chem-level{display:inline-flex;border:1px solid var(--line);border-radius:999px;padding:2px;background:#fff;flex:none}
.chem-level button{border:0;background:transparent;font-size:11px;font-weight:800;letter-spacing:.04em;padding:4px 9px;border-radius:999px;color:var(--mute);cursor:pointer}
.chem-level button.on{background:var(--gold);color:#1b2333}
.chem-body{flex:1;min-height:0;overflow:auto;position:relative}
.chem-pane{display:none;padding:10px;height:100%}
.chem-pane.on{display:block}
.chem-cape{display:inline-flex;align-items:center;gap:5px;font-size:10px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:#7c2d12;background:#ffedd5;border:1px solid #fdba74;border-radius:999px;padding:2px 8px;vertical-align:middle}
.chem-note{font-size:11.5px;color:var(--mute);margin:6px 0}
/* ---- periodic table ---- */
.chem-ptwrap{display:flex;flex-direction:column;gap:8px;height:100%}
.chem-pthead{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.chem-search{flex:1;min-width:150px;border:1px solid var(--line);border-radius:10px;padding:7px 10px;font:inherit;font-size:13px}
.chem-search:focus{outline:2px solid rgba(245,166,35,.5);border-color:var(--gold)}
.chem-chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:4px 10px;font-size:11.5px;font-weight:700;color:var(--navy2);cursor:pointer}
.chem-chip.on{background:var(--navy);color:#fff;border-color:var(--navy)}
.chem-pt{display:grid;grid-template-columns:repeat(18,minmax(0,1fr));grid-auto-rows:1fr;gap:2px;width:100%;flex:1;min-height:0}
.chem-pt .gap{grid-column:1/-1;height:6px}
.chem-el{position:relative;border-radius:4px;background:#eef2f8;border:1px solid transparent;cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:1px;min-width:0;aspect-ratio:1/1.05;transition:transform .08s;user-select:none;-webkit-user-select:none}
.chem-el:hover{transform:scale(1.12);z-index:2;box-shadow:0 6px 16px -8px rgba(22,41,74,.6)}
.chem-el .z{position:absolute;top:1px;left:3px;font-size:7px;font-weight:600;color:var(--mute);line-height:1}
.chem-el .sy{font-size:clamp(9px,1.4vw,15px);font-weight:800;color:var(--navy);line-height:1}
.chem-el .ar{font-size:7px;font-weight:600;color:var(--mute);line-height:1;margin-top:2px}
.chem-el.dim{opacity:.32;filter:saturate(.3)}
.chem-el.hit{outline:2px solid var(--gold);outline-offset:1px}
.chem-el.sel{outline:2px solid var(--navy);outline-offset:1px}
.chem-el[data-cat=alkali]{background:#ffe4cc}.chem-el[data-cat=alkaline]{background:#fff0c2}.chem-el[data-cat=transition]{background:#dbe7ff}.chem-el[data-cat=post]{background:#e2e8f0}
.chem-el[data-cat=metalloid]{background:#ccf2ef}.chem-el[data-cat=nonmetal]{background:#d9f5df}.chem-el[data-cat=halogen]{background:#ecdcff}.chem-el[data-cat=noble]{background:#ffd9e8}
.chem-el[data-cat=lanthanide]{background:#e6dcff}.chem-el[data-cat=actinide]{background:#dcdcff}.chem-el[data-cat=other]{background:#eee}
.chem-el[data-st=gas] .sy{color:#1d4ed8}.chem-el[data-st=liquid] .sy{color:#0f766e}
.chem-legend{display:flex;gap:8px;flex-wrap:wrap;font-size:10.5px;color:var(--mute);align-items:center}
.chem-legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:4px;vertical-align:-1px}
/* ---- element card (overlay inside the pane) ---- */
.chem-card{position:absolute;inset:0;background:#fff;display:flex;flex-direction:column;z-index:5}
.chem-card-head{display:flex;align-items:center;gap:10px;padding:8px 10px;border-bottom:1px solid var(--line);background:var(--paper)}
.chem-back{border:1px solid var(--line);background:#fff;border-radius:9px;padding:5px 10px;font-weight:700;color:var(--navy);cursor:pointer}
.chem-tile{width:58px;height:64px;border-radius:10px;border:2px solid var(--gold);background:#FFF9EC;display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1;flex:none}
.chem-tile .z{font-size:9px;color:var(--mute);font-weight:600}.chem-tile .sy{font-size:24px;font-weight:800;color:var(--navy)}.chem-tile .ar{font-size:9px;font-weight:700;color:var(--navy2);margin-top:2px}
.chem-card-title h2{margin:0;font-size:17px;color:var(--navy)}.chem-card-title p{margin:2px 0 0;font-size:11.5px;color:var(--mute)}
.chem-subtabs{display:flex;gap:2px;padding:6px 10px 0;border-bottom:1px solid var(--line);flex-wrap:wrap}
.chem-subtab{border:0;background:transparent;font-weight:700;font-size:12px;color:var(--mute);padding:6px 9px;border-radius:8px 8px 0 0;cursor:pointer;display:inline-flex;gap:6px;align-items:center}
.chem-subtab.on{color:var(--navy);box-shadow:inset 0 -2px 0 var(--gold)}
.chem-card-body{flex:1;min-height:0;overflow:auto;padding:10px}
.chem-facts{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:6px 12px;margin:0}
.chem-facts div{border-bottom:1px dashed var(--line);padding:4px 0;font-size:12px}
.chem-facts b{display:block;font-size:10px;letter-spacing:.06em;text-transform:uppercase;color:var(--mute);font-weight:700}
.chem-facts .v{color:var(--navy);font-weight:600}
.chem-ions{display:flex;gap:6px;flex-wrap:wrap;margin-top:4px}
.chem-ion{background:#eef2f8;border-radius:8px;padding:3px 8px;font-weight:700;color:var(--navy);font-size:12.5px}
.chem-actions{display:flex;gap:6px;flex-wrap:wrap;padding:8px 10px;border-top:1px solid var(--line);background:var(--paper)}
.chem-btn{border:1.5px solid var(--line);background:#fff;color:var(--navy);border-radius:10px;padding:7px 12px;font-weight:700;font-size:12.5px;cursor:pointer;display:inline-flex;gap:6px;align-items:center}
.chem-btn:hover{border-color:var(--gold)}
.chem-btn.p{background:var(--navy);color:#fff;border-color:var(--navy)}
.chem-btn.g{background:var(--gold);color:#1b2333;border-color:var(--gold)}
.chem-btn:disabled{opacity:.45;cursor:default}
.chem-viz{width:100%;background:radial-gradient(120% 90% at 50% 0%,#fff,#e9eff8);border:1px solid var(--line);border-radius:14px;overflow:hidden;position:relative}
.chem-viz canvas,.chem-viz svg{display:block;width:100%;height:auto}
.chem-viz .hint{position:absolute;left:10px;bottom:8px;font-size:10.5px;color:var(--mute);background:rgba(255,255,255,.85);border-radius:999px;padding:2px 8px}
.chem-ctl{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:8px;font-size:12px;color:var(--navy2);font-weight:600}
.chem-ctl select,.chem-ctl input[type=range]{font:inherit}
.chem-ctl select{border:1px solid var(--line);border-radius:8px;padding:4px 8px;background:#fff}
.chem-boxes{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end;margin-top:8px}
.chem-boxes .sub{display:flex;flex-direction:column;align-items:center;gap:3px}
.chem-boxes .row{display:flex;gap:2px}
.chem-boxes .bx{width:22px;height:22px;border:1.5px solid var(--navy2);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;color:var(--navy);letter-spacing:-2px}
.chem-boxes .lb{font-size:10px;color:var(--mute);font-weight:700}
/* ---- tools (molar / balance / ions / solubility) ---- */
.chem-tool{max-width:720px}
.chem-field{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.chem-in{flex:1;min-width:160px;border:1px solid var(--line);border-radius:10px;padding:8px 10px;font:inherit;font-size:14px}
.chem-in:focus{outline:2px solid rgba(245,166,35,.5);border-color:var(--gold)}
.chem-err{color:#b91c1c;font-size:12px;margin-top:6px}
.chem-work{margin-top:10px;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:10px 12px}
.chem-work table{border-collapse:collapse;width:100%;font-size:13px}
.chem-work td,.chem-work th{padding:4px 6px;text-align:left;border-bottom:1px dashed var(--line)}
.chem-work th{font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--mute)}
.chem-work td.n{text-align:right;font-variant-numeric:tabular-nums}
.chem-total{display:inline-block;margin-top:8px;background:var(--navy);color:#fff;border-radius:10px;padding:6px 12px;font-weight:700;font-size:14px}
.chem-total small{color:#ffd88a;font-size:10px;letter-spacing:.06em;text-transform:uppercase;margin-right:8px}
.chem-eq{font-size:16px;line-height:1.5;color:var(--navy);font-weight:600;font-family:"STIX Two Text","Times New Roman",serif}
.chem-eqrow{display:flex;gap:6px;align-items:center;flex-wrap:wrap;font-size:16px;font-family:"STIX Two Text","Times New Roman",serif;color:var(--navy)}
.chem-eqrow .sp{display:inline-flex;align-items:center;gap:3px}
.chem-eqrow input{width:38px;border:1.5px solid var(--line);border-radius:8px;padding:4px;font:700 14px Poppins,sans-serif;text-align:center;color:var(--navy)}
.chem-eqrow input.bad{border-color:#ef4444;background:#fff1f2}.chem-eqrow input.good{border-color:#16a34a;background:#f0fdf4}
.chem-tally{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}
.chem-tally span{border-radius:8px;padding:3px 8px;font-size:12px;font-weight:700;background:#f0fdf4;color:#166534;border:1px solid #bbf7d0}
.chem-tally span.bad{background:#fff1f2;color:#991b1b;border-color:#fecaca}
.chem-seg{display:inline-flex;border:1px solid var(--line);border-radius:999px;padding:2px;background:#fff}
.chem-seg button{border:0;background:transparent;font-size:11.5px;font-weight:700;padding:4px 10px;border-radius:999px;color:var(--mute);cursor:pointer}
.chem-seg button.on{background:var(--navy);color:#fff}
.chem-grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media(max-width:560px){.chem-grid2{grid-template-columns:1fr}}
.chem-list{display:flex;flex-direction:column;gap:2px;max-height:260px;overflow:auto;border:1px solid var(--line);border-radius:10px;padding:4px}
.chem-list button{border:0;background:transparent;text-align:left;padding:5px 8px;border-radius:7px;font-size:13px;color:var(--ink);cursor:pointer;display:flex;justify-content:space-between;gap:8px}
.chem-list button:hover{background:#eef2f8}.chem-list button.on{background:var(--navy);color:#fff}
.chem-list button small{color:inherit;opacity:.7}
.chem-soltab{width:100%;border-collapse:separate;border-spacing:2px;font-size:11px;table-layout:fixed}
.chem-soltab th{font-size:10px;color:var(--mute);font-weight:700;padding:2px}
.chem-soltab td{text-align:center;border-radius:5px;padding:5px 2px;font-weight:800;color:#fff}
.chem-soltab td.S{background:#16a34a}.chem-soltab td.I{background:#dc2626}.chem-soltab td.s{background:#f59e0b;color:#1b2333}
.chem-soltab td.hi{outline:2px solid var(--navy)}
.chem-qual{width:100%;border-collapse:collapse;font-size:12px}
.chem-qual th,.chem-qual td{border-bottom:1px solid var(--line);padding:5px 6px;text-align:left;vertical-align:top}
.chem-qual th{font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--mute)}
.chem-qual td:first-child{font-weight:700;color:var(--navy);white-space:nowrap}
/* stamp toast */
.chem-flash{position:absolute;left:50%;bottom:12px;transform:translateX(-50%);background:var(--navy);color:#fff;border-radius:999px;padding:6px 14px;font-size:12px;font-weight:700;opacity:0;transition:.2s;pointer-events:none;z-index:9}
.chem-flash.show{opacity:1}
/* chalkboard */
.chem.chalk{background:#152238;color:#e5e9f2;--ink:#e5e9f2;--line:#2b3a5e;--paper:#1b2a44;--navy:#e5e9f2;--navy2:#c9d4e8;--mute:#9fb0cc}
.chem.chalk .chem-tab.on{background:var(--gold);color:#1b2333}.chem.chalk .chem-el{background:#233252;border-color:#2b3a5e}.chem.chalk .chem-el .sy{color:#fff}
.chem.chalk .chem-tile{background:#1b2a44}.chem.chalk .chem-btn{background:#1b2a44}.chem.chalk .chem-btn.p{background:var(--gold);color:#1b2333;border-color:var(--gold)}
.chem.chalk .chem-total{background:var(--gold);color:#1b2333}.chem.chalk .chem-card{background:#152238}.chem.chalk .chem-in,.chem.chalk .chem-search,.chem.chalk .chem-ctl select{background:#1b2a44;color:#fff}
.chem.chalk .chem-eqrow input{background:#1b2a44;color:#fff}.chem.chalk .chem-ion{background:#233252;color:#fff}.chem.chalk .chem-list button:hover{background:#233252}
.chem.chalk .chem-viz{background:radial-gradient(120% 90% at 50% 0%,#22345a,#131d33)}

/* hover peek on the periodic table (chem-ui v3) */
.chem-ptwrap{position:relative}
.chem-peek{position:absolute;z-index:6;width:212px;background:#0f172a;border-radius:12px;padding:6px 6px 5px;box-shadow:0 18px 40px -14px rgba(0,0,0,.6),0 0 0 1px rgba(255,255,255,.08);pointer-events:none;animation:chemPeekIn .16s ease-out}
.chem-peek canvas{display:block;width:200px;height:140px;border-radius:8px;background:#0b1220}
.chem-peek b{display:block;color:#fff;font:600 12px/1.3 Poppins,system-ui,sans-serif;padding:5px 3px 1px}
.chem-peek b span{color:#94a3b8;font-weight:500;margin-left:6px}
@keyframes chemPeekIn{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}