/* ArumSoft Function Playground */
.fxa{--g-line:#d9dde1;--g-head:#f3f5f6;--g-head-on:#dfe9e4;--g-sel:var(--color-brand,#177a5a);--g-in:rgba(23,122,90,.09);font-size:15px;color:var(--color-ink,#1c2126)}
.fxa *{box-sizing:border-box}
.fxa button{font:inherit;cursor:pointer}
.fxa code{font-family:var(--font-mono,monospace);font-size:.9em}
.fxa-toolbar{display:flex;flex-wrap:wrap;gap:12px 16px;align-items:flex-start;justify-content:space-between;margin-bottom:12px}
.fxa-tries{display:flex;flex-wrap:wrap;gap:6px;align-items:center;min-width:0;flex:1 1 420px}
.fxa-label{font-size:.75rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--color-muted,#5b6670);margin-right:4px}
.fxa-chip{border:1px solid var(--color-line,#e3e7ea);background:#fff;border-radius:999px;padding:4px 10px;max-width:100%;text-align:left;transition:border-color .15s,background .15s}
.fxa-chip code{font-size:.8rem;color:var(--color-brand-ink,#146c50);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block;max-width:420px}
.fxa-chip:hover{border-color:var(--color-brand,#177a5a);background:var(--color-brand-soft,#e8f4ef)}
.fxa-actions{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.fxa-btn{display:inline-flex;align-items:center;gap:4px;border:1px solid var(--color-line,#e3e7ea);background:#fff;border-radius:8px;padding:6px 11px;font-size:.875rem;color:var(--color-ink,#1c2126);text-decoration:none;white-space:nowrap}
.fxa-btn:hover{border-color:var(--color-brand,#177a5a)}
.fxa-btn:disabled{opacity:.4;cursor:default;border-color:var(--color-line,#e3e7ea)}
.fxa-btn-primary{background:var(--color-brand,#177a5a);border-color:var(--color-brand,#177a5a);color:#fff}
.fxa-btn-primary:hover{background:var(--color-brand-ink,#146c50)}
.fxa-icon{padding:5px 7px}
.fxa-select{border:1px solid var(--color-line,#e3e7ea);border-radius:8px;padding:6px 8px;font:inherit;font-size:.875rem;background:#fff;max-width:220px}

.fxa-main{display:grid;grid-template-columns:minmax(0,1fr);gap:16px}
@media (min-width:1100px){.fxa-main{grid-template-columns:minmax(0,1.45fr) minmax(320px,1fr)}}
.fxa-sheet{border:1px solid var(--color-line,#e3e7ea);border-radius:12px;background:#fff;overflow:hidden;min-width:0;display:flex;flex-direction:column;align-self:start}
.fxa-bar{display:flex;align-items:stretch;border-bottom:1px solid var(--g-line);background:#fff}
.fxa-namebox{width:76px;flex:none;border:0;border-right:1px solid var(--g-line);padding:6px 8px;font:13px var(--font-mono,monospace);background:#fff;color:var(--color-ink,#1c2126)}
.fxa-fx{display:flex;align-items:center;padding:0 10px;font-style:italic;font-family:Georgia,serif;color:var(--color-muted,#5b6670);border-right:1px solid var(--g-line)}
.fxa-formula{flex:1;min-width:0;border:0;padding:7px 10px;font:14px var(--font-mono,monospace);outline:none}
.fxa-formula:focus{box-shadow:inset 0 -2px 0 var(--g-sel)}
.fxa-tipwrap{position:relative}
.fxa-tip{font-size:.8rem;color:var(--color-muted,#5b6670);padding:0 10px;background:#fbfcfc;border-bottom:1px solid transparent;min-height:0}
.fxa-tip:not(:empty){padding:6px 10px;border-bottom-color:var(--g-line)}
.fxa-tip code{display:inline-block;color:var(--color-ink,#1c2126);margin-right:8px}
.fxa-tip b{color:var(--color-brand-ink,#146c50)}
.fxa-tip span{display:inline}
.fxa-warn{color:#b42318}
.fxa-ac{position:absolute;z-index:30;left:84px;top:0;margin:0;padding:4px;list-style:none;background:#fff;border:1px solid var(--g-line);border-radius:8px;box-shadow:0 10px 24px rgba(0,0,0,.12);min-width:280px;max-width:420px}
.fxa-ac li{display:flex;gap:10px;align-items:baseline;padding:5px 8px;border-radius:6px;cursor:pointer;font-size:.8rem}
.fxa-ac li code{font-weight:600;min-width:96px}
.fxa-ac li span{color:var(--color-muted,#5b6670);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.fxa-ac li.on,.fxa-ac li:hover{background:var(--color-brand-soft,#e8f4ef)}
.fxa-scroll{position:relative;overflow:auto;max-height:520px;-webkit-overflow-scrolling:touch}
.fxa-grid{width:max-content;border-collapse:separate;border-spacing:0;table-layout:fixed;font:13px/1.2 "Aptos","Calibri","Segoe UI",var(--font-sans,system-ui),sans-serif;user-select:none;-webkit-user-select:none}
.fxa-grid th{position:sticky;background:var(--g-head);color:#555;font-weight:400;font-size:12px;border-right:1px solid var(--g-line);border-bottom:1px solid var(--g-line);z-index:2}
.fxa-grid thead th{top:0;height:22px;text-align:center}
.fxa-grid tbody th{left:0;text-align:center;z-index:1}
.fxa-grid th.fxa-corner{left:0;z-index:3}
.fxa-grid th.on{background:var(--g-head-on);color:var(--color-brand-ink,#146c50);font-weight:600}
.fxa-grid td{height:26px;padding:0 6px;border-right:1px solid #eceef0;border-bottom:1px solid #eceef0;white-space:nowrap;overflow:hidden;text-overflow:clip;position:relative;cursor:cell;background:#fff}
.fxa-grid td.n{text-align:right;font-variant-numeric:tabular-nums}
.fxa-grid td.b,.fxa-grid td.e{text-align:center}
.fxa-grid td.e{color:#b42318}
.fxa-grid td.hd{font-weight:700;background:#f7faf9}
.fxa-grid td.lb{color:var(--color-muted,#5b6670);font-style:italic}
.fxa-grid td.in{background:var(--g-in)}
.fxa-grid td.act{outline:2px solid var(--g-sel);outline-offset:-2px;z-index:1}
.fxa-grid td.st{box-shadow:inset 0 1.5px 0 #2f6fd6}
.fxa-grid td.sb{box-shadow:inset 0 -1.5px 0 #2f6fd6}
.fxa-grid td.st.sb{box-shadow:inset 0 1.5px 0 #2f6fd6,inset 0 -1.5px 0 #2f6fd6}
.fxa-grid td.sl:after,.fxa-grid td.sr:after{content:"";position:absolute;top:0;bottom:0;border-left:1.5px dashed #2f6fd6}
.fxa-grid td.sl:after{left:0}.fxa-grid td.sr:after{right:0}
/* step highlights */
.fxa-grid td[data-hl=fx-hl-range]{background:#eaf2fd}
.fxa-grid td[data-hl=fx-hl-ref]{background:#eaf2fd;box-shadow:inset 0 0 0 2px #2f6fd6}
.fxa-grid td[data-hl=fx-hl-ok]{background:#dcf3e6;box-shadow:inset 0 0 0 1px #3da26a}
.fxa-grid td[data-hl=fx-hl-skip]{background:#f4f4f5;color:#9aa1a8}
.fxa-grid td[data-hl=fx-hl-dim]{color:#b7bcc1}
.fxa-grid td[data-hl=fx-hl-out]{background:#fff2d6;box-shadow:inset 0 0 0 2px #e0a100}
/* reference colours while editing */
.fxa-grid td[data-rc]{background-image:none}
.fxa-grid td[data-rc^="0"]{--rc:#2f6fd6}.fxa-grid td[data-rc^="1"]{--rc:#d64545}.fxa-grid td[data-rc^="2"]{--rc:#7a3fc4}.fxa-grid td[data-rc^="3"]{--rc:#1f9d55}.fxa-grid td[data-rc^="4"]{--rc:#d97706}.fxa-grid td[data-rc^="5"]{--rc:#0e8a9a}
.fxa-grid td[data-rc]{background-color:color-mix(in srgb,var(--rc) 9%,#fff)}
.fxa-grid td[data-rc*=" "]:before{content:"";position:absolute;inset:0;pointer-events:none}
.fxa-grid td[data-rc*="t"]:before{border-top:2px solid var(--rc)}
.fxa-grid td[data-rc*="b"]:before{border-bottom:2px solid var(--rc)}
.fxa-grid td[data-rc*="l"]:before{border-left:2px solid var(--rc)}
.fxa-grid td[data-rc*="r"]:before{border-right:2px solid var(--rc)}
.fxa-editor{position:absolute;z-index:5;border:0;outline:2px solid var(--g-sel);outline-offset:-2px;padding:0 6px;font:13px "Aptos","Calibri","Segoe UI",var(--font-sans,system-ui),sans-serif;background:#fff;opacity:0;caret-color:transparent;pointer-events:none}
.fxa-editor.on{opacity:1;caret-color:auto;pointer-events:auto;box-shadow:0 2px 8px rgba(0,0,0,.15)}
.fxa-status{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;border-top:1px solid var(--g-line);background:var(--g-head);padding:4px 10px;font-size:12px;color:#555;min-height:26px}
.fxa-agg i{display:inline-block;width:14px}
.fxa-mode{color:var(--color-brand-ink,#146c50);font-weight:600}
.fxa.is-picking .fxa-grid td{cursor:crosshair}

/* steps panel */
.fxa-steps{border:1px solid var(--color-line,#e3e7ea);border-radius:12px;background:#fff;display:flex;flex-direction:column;min-width:0;max-height:640px}
.fxs-head{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 12px;border-bottom:1px solid var(--color-line,#e3e7ea)}
.fxs-head h3{margin:0;font-size:1rem;font-weight:600}
.fxs-nav{display:flex;align-items:center;gap:6px}
.fxs-count{font-size:.8rem;color:var(--color-muted,#5b6670);margin-right:4px;white-space:nowrap}
.fxs-formula{padding:8px 12px;background:var(--color-subtle,#f6f8f9);border-bottom:1px solid var(--color-line,#e3e7ea);font:13px var(--font-mono,monospace);word-break:break-all}
.fxs-formula:empty{display:none}
.fxs-formula code{background:var(--color-brand-soft,#e8f4ef);color:var(--color-brand-ink,#146c50);padding:1px 5px;border-radius:4px;margin-right:4px}
.fxs-body{overflow:auto;padding:10px 12px 14px;position:relative}
.fxs-list,.fxs-inner{list-style:none;margin:0;padding:0;counter-reset:st}
.fxs-list>li{counter-increment:st;position:relative;padding:8px 10px 8px 34px;border-radius:10px;border:1px solid transparent;margin-bottom:4px;cursor:pointer}
.fxs-list>li:before{content:counter(st);position:absolute;left:8px;top:9px;width:19px;height:19px;border-radius:50%;background:var(--color-subtle,#f6f8f9);border:1px solid var(--color-line,#e3e7ea);font-size:11px;line-height:17px;text-align:center;color:var(--color-muted,#5b6670)}
.fxs-list>li.on,.fxs-group:has(>.fxs-ghead.on){background:#fbfcfc;border-color:var(--color-line,#e3e7ea)}
.fxs-list>li.on:before{background:var(--color-brand,#177a5a);border-color:var(--color-brand,#177a5a);color:#fff}
.fxs-title{font-weight:600;font-size:.9rem;margin-bottom:2px}
.fxs-text{font-size:.875rem;line-height:1.55;color:#2f363c}
.fxs-text code,.fxs-sub code,.fxs-res code{background:var(--color-subtle,#f6f8f9);border:1px solid var(--color-line,#e3e7ea);border-radius:4px;padding:0 4px;font-size:.8rem}
.fxs-text code.fx-v,.fxs-res code{background:#fff8e6;border-color:#f1dfae}
.fxs-text code.fx-err{background:#fdeeee;border-color:#f3c4c4;color:#b42318}
.fxs-text code.fx-formula{display:inline-block;margin-top:4px;background:#fff;word-break:break-all}
.fxs-ok .fxs-title{color:var(--color-brand-ink,#146c50)}
.fxs-err .fxs-title{color:#b42318}
.fxs-ghead{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 8px;border-radius:6px}
.fxs-ghead .fxs-title{margin:0}
.fxs-sub{font-size:.8rem;word-break:break-all}
.fxs-res{font-size:.8rem;color:var(--color-muted,#5b6670)}
.fxs-ghead.on .fxs-title{color:var(--color-brand-ink,#146c50)}
.fxs-inner{margin-top:6px;border-left:2px solid var(--color-line,#e3e7ea);padding-left:10px}
.fxs-inner>li{padding:6px 8px;border-radius:8px;margin-bottom:2px}
.fxs-inner>li.on{background:var(--color-brand-soft,#e8f4ef)}
.fxs-tablewrap{overflow-x:auto;margin-top:6px}
.fxs-table{border-collapse:collapse;font-size:.78rem;width:100%}
.fxs-table th{text-align:left;font-weight:600;color:var(--color-muted,#5b6670);border-bottom:1px solid var(--color-line,#e3e7ea);padding:3px 6px;white-space:nowrap}
.fxs-table td{padding:3px 6px;border-bottom:1px solid #f0f2f3;white-space:nowrap;max-width:200px;overflow:hidden;text-overflow:ellipsis}
.fxs-table tr.ok td{background:#f1faf5}
.fxs-table tr.no td{color:#8a9299}
.fxs-table tbody tr:hover td{background:#fff3d6;color:inherit}
.fxs-note{font-size:.9rem;margin:4px 0 8px}
.fxs-hint{font-size:.85rem;color:var(--color-muted,#5b6670);margin:0 0 6px}
.fxs-warn{font-size:.85rem;background:#fdeeee;border:1px solid #f3c4c4;color:#8f1f1f;border-radius:8px;padding:6px 8px;margin:0 0 8px}
.fx-chars{display:flex;flex-wrap:wrap;gap:2px;margin:6px 0 2px}
.fx-ch{display:inline-flex;flex-direction:column;align-items:center;min-width:18px;padding:1px 2px 2px;border:1px solid var(--color-line,#e3e7ea);border-radius:4px;font:12px var(--font-mono,monospace);background:#fff}
.fx-ch i{font-style:normal;font-size:9px;color:#9aa1a8}
.fx-ch.on{background:#dcf3e6;border-color:#3da26a}
.fx-mono{font:13px var(--font-mono,monospace);background:var(--color-subtle,#f6f8f9);border-radius:6px;padding:4px 8px;margin-top:4px;white-space:pre-wrap;word-break:break-all}
.fx-sp{color:#d64545;font-weight:700}

/* builder */
.fxb{margin-top:16px;border:1px solid var(--color-line,#e3e7ea);border-radius:12px;background:#fff;padding:14px 16px}
.fxb-head h3{margin:0 0 2px;font-size:1rem;font-weight:600}
.fxb-head p{margin:0 0 12px;font-size:.875rem;color:var(--color-muted,#5b6670)}
.fxb-grid{display:grid;gap:16px;grid-template-columns:minmax(0,1fr)}
@media (min-width:900px){.fxb-grid{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr)}}
.fxb-fnlabel{display:flex;align-items:center;gap:10px;font-size:.875rem;font-weight:600;margin-bottom:8px}
.fxb-info p{margin:0 0 4px;font-size:.875rem}
.fxb-info code{display:block;font-size:.8rem;color:var(--color-muted,#5b6670);margin-bottom:10px;word-break:break-word}
.fxb-row{display:grid;grid-template-columns:minmax(120px,170px) minmax(0,1fr);gap:2px 12px;padding:8px;border-radius:8px;border:1px solid transparent}
.fxb-row.on{background:var(--color-brand-soft,#e8f4ef);border-color:#bfe0d2}
.fxb-name{display:flex;flex-direction:column;gap:1px;padding-top:6px}
.fxb-name code{font-weight:600;font-size:.8rem;word-break:break-all}
.fxb-tag{font-size:.7rem;color:var(--color-muted,#5b6670)}
.fxb-field{display:flex;gap:6px}
.fxb-input{flex:1;min-width:0;border:1px solid var(--color-line,#e3e7ea);border-radius:6px;padding:6px 8px;font:13px var(--font-mono,monospace)}
.fxb-input:focus{outline:2px solid var(--color-brand,#177a5a);outline-offset:-1px;border-color:transparent}
.fxb-x{border:1px solid var(--color-line,#e3e7ea);background:#fff;border-radius:6px;width:30px}
.fxb-desc{grid-column:2;margin:0;font-size:.78rem;color:var(--color-muted,#5b6670)}
.fxb-desc:empty{display:none}
.fxb-add{margin:6px 8px;border:1px dashed var(--color-line,#c9cfd4);background:#fff;border-radius:6px;padding:4px 10px;font-size:.8rem;color:var(--color-brand-ink,#146c50)}
.fxb-none{font-size:.85rem;color:var(--color-muted,#5b6670)}
.fxb-right{background:var(--color-subtle,#f6f8f9);border-radius:10px;padding:12px;align-self:start}
.fxb-label{font-size:.7rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--color-muted,#5b6670);margin:2px 0 4px}
.fxb-preview{display:block;background:#fff;border:1px solid var(--color-line,#e3e7ea);border-radius:6px;padding:8px;font-size:.85rem;word-break:break-all;margin-bottom:10px;min-height:36px}
.fxb-result{font-size:.9rem;margin-bottom:12px}
.fxb-result p{margin:4px 0 0;font-size:.8rem;color:var(--color-muted,#5b6670)}
.fxb-ok{font-weight:600}
.fxb-err{font-weight:600;color:#b42318}
.fxb-note{font-style:italic}
.fxb-btns{display:flex;gap:8px;flex-wrap:wrap}

@media (max-width:640px){
  .fxa-chip code{max-width:72vw}
  .fxa-scroll{max-height:420px}
  .fxa-steps{max-height:none}
  .fxb-row{grid-template-columns:minmax(0,1fr)}
  .fxb-desc{grid-column:1}
}

/* static page content */
.fxp-section{margin-top:40px}
.fxp-section h2{font-size:1.4rem;font-weight:700;letter-spacing:-.01em;margin:0 0 12px}
.fxp-prose p{margin:0 0 12px;line-height:1.7}
.fxp-syntax{display:block;background:var(--color-subtle,#f6f8f9);border:1px solid var(--color-line,#e3e7ea);border-radius:10px;padding:12px 14px;font:14px var(--font-mono,monospace);overflow-x:auto;white-space:pre-wrap;word-break:break-word}
.fxp-table{width:100%;border-collapse:collapse;font-size:.95rem}
.fxp-table th,.fxp-table td{text-align:left;vertical-align:top;border-bottom:1px solid var(--color-line,#e3e7ea);padding:9px 10px}
.fxp-table th{font-size:.8rem;text-transform:uppercase;letter-spacing:.04em;color:var(--color-muted,#5b6670);font-weight:600}
.fxp-table code{font:13px var(--font-mono,monospace);word-break:break-all}
.fxp-tablewrap{overflow-x:auto;border:1px solid var(--color-line,#e3e7ea);border-radius:10px}
.fxp-tablewrap .fxp-table tr:last-child td{border-bottom:0}
.fxp-tag{display:inline-block;font-size:.72rem;border-radius:999px;padding:1px 8px;background:var(--color-subtle,#f6f8f9);color:var(--color-muted,#5b6670);margin-left:6px;white-space:nowrap}
.fxp-cards{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}
.fxp-card{display:block;border:1px solid var(--color-line,#e3e7ea);border-radius:12px;padding:14px;background:#fff;text-decoration:none;color:inherit;transition:border-color .15s,box-shadow .15s}
.fxp-card:hover{border-color:var(--color-brand,#177a5a);box-shadow:0 2px 8px rgba(0,0,0,.05)}
.fxp-card b{display:block;font-family:var(--font-mono,monospace);font-size:.95rem;color:var(--color-brand-ink,#146c50)}
.fxp-card span{display:block;font-size:.875rem;color:var(--color-muted,#5b6670);margin-top:4px;line-height:1.5}
.fxp-mistakes{display:grid;gap:10px}
.fxp-mistake{border-left:4px solid var(--color-warn-line,#d64545);background:var(--color-warn,#fdeeee);border-radius:0 10px 10px 0;padding:10px 14px}
.fxp-mistake b{display:block;margin-bottom:2px}
.fxp-related{display:flex;flex-wrap:wrap;gap:8px}
.fxp-related a{border:1px solid var(--color-line,#e3e7ea);border-radius:999px;padding:5px 12px;font:13px var(--font-mono,monospace);text-decoration:none;color:var(--color-brand-ink,#146c50);background:#fff}
.fxp-related a:hover{border-color:var(--color-brand,#177a5a)}
.fxp-noscript{border:1px dashed var(--color-line,#c9cfd4);border-radius:12px;padding:20px;color:var(--color-muted,#5b6670)}
#fx-app:empty{min-height:560px;border:1px solid var(--color-line,#e3e7ea);border-radius:12px;background:linear-gradient(90deg,#f6f8f9 0,#fff 50%,#f6f8f9 100%);background-size:200% 100%;animation:fxload 1.4s infinite linear}
@keyframes fxload{to{background-position:-200% 0}}
.fxp-head{max-width:820px}
.fxp-eyebrow{margin:14px 0 4px;font-size:.8rem;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--color-brand-ink,#146c50)}
.fxp-head h1{margin:6px 0 0}
.fxp-lead{margin:10px 0 0;font-size:1.1rem;line-height:1.6;color:var(--color-muted,#5b6670)}
.fxp-meta{display:flex;flex-wrap:wrap;gap:8px 16px;align-items:center;margin-top:12px;font-size:.9rem}
.fxp-pill{display:inline-block;border-radius:999px;background:var(--color-note,#eef4fb);color:#2f5d93;padding:2px 10px;font-size:.8rem}
.fxp-link{color:var(--color-brand-ink,#146c50);font-weight:500;text-decoration:none}
.fxp-link:hover{text-decoration:underline}
.fxp-app{margin-top:24px}
.fxp-small{font-size:.85rem;color:var(--color-muted,#5b6670)}
.fxp-center{text-align:center;margin-top:10px}
.fxp-mt{margin-top:12px}
.fxp-dl{display:inline-flex;align-items:center;gap:6px;background:var(--color-brand,#177a5a);color:#fff;border-radius:8px;padding:9px 16px;font-weight:600;text-decoration:none}
.fxp-dl:hover{background:var(--color-brand-ink,#146c50)}
.fxp-related a.fxp-all{font-family:inherit;color:var(--color-muted,#5b6670)}
.fxb-target{display:flex;align-items:center;gap:6px;font-size:.85rem;margin-bottom:10px}.fxb-target input{width:72px;border:1px solid var(--color-line,#e3e7ea);border-radius:6px;padding:5px 7px;font:13px var(--font-mono,monospace);text-transform:uppercase}