/* Excel CSE – site styles
   Layout: calm editorial (design 3) · Inter (design 2) · header with fx search (design 2) · chunky buttons & banners (design 1) */

:root{
  --lime:#6cc23a; --lime-d:#479022; --lime-l:#f3faec; --lime-ll:#ddf1cc;
  --green:#2f6a15; --green-d:#1d4a0c;
  --ink:#1b1f19; --text:#454b41; --mute:#6a7065;
  --line:#ecede9; --line-2:#cfd4ca; --soft:#f7f8f5; --head:#f5f6f3;
  --err:#a3261a;
  --font:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:84px}
body{margin:0;font-family:var(--font);color:var(--ink);background:#fff;line-height:1.6;font-size:17px}
a{color:var(--green)}
a:hover{color:var(--green-d)}
img{max-width:100%}

/* ---------- Header (design 2, without sub-nav) ---------- */
.top{position:sticky;top:0;z-index:10;background:#fff;border-bottom:1px solid #d8dcd4}
.top .in{max-width:1160px;margin:0 auto;padding:10px 24px;display:flex;align-items:center;gap:18px}
.logo{display:flex;flex-shrink:0}
.logo img{height:30px;width:auto;display:block}
.fx-search{flex:1 1 320px;max-width:520px;display:flex;align-items:stretch;border:1px solid var(--line-2);border-radius:6px;overflow:hidden;background:#fff;margin:0}
.fx-search:focus-within{border-color:var(--lime-d);box-shadow:0 0 0 3px rgba(108,194,58,.25)}
.fx-search .fx{background:#eef1eb;color:#5f665b;font-family:var(--mono);font-style:italic;padding:8px 12px;border-right:1px solid var(--line-2);display:flex;align-items:center}
.fx-search input{border:0;outline:none;padding:8px 12px;font-family:var(--mono);font-size:14px;flex:1;min-width:0;background:transparent;color:var(--ink)}
.top nav{margin-left:auto;display:flex;align-items:center;gap:6px}
.top nav a.nav{color:var(--ink);text-decoration:none;font-weight:600;font-size:15px;padding:8px 12px;border-radius:6px}
.top nav a.nav:hover{background:var(--soft)}

/* ---------- Buttons (design 1) ---------- */
.btn{display:inline-block;background:var(--lime);color:#13260a;font-family:var(--font);font-weight:800;font-size:14px;letter-spacing:.5px;text-transform:uppercase;text-decoration:none;padding:12px 20px;border:0;border-bottom:4px solid var(--lime-d);border-radius:14px;cursor:pointer;line-height:1.2;text-align:center}
.btn:hover{background:#78cc46;color:#13260a}
.btn:active{transform:translateY(2px);border-bottom-width:2px;margin-bottom:2px}
.btn.sm{font-size:13px;padding:9px 14px;border-radius:12px}
.btn.block{display:block}

/* ---------- Page layout (design 3) ---------- */
.layout{max-width:1160px;margin:0 auto;padding:36px 24px 72px;display:flex;gap:56px;align-items:flex-start}
.layout main{flex:1 1 auto;min-width:0;max-width:720px}
.sidebar{flex:0 0 260px;position:sticky;top:84px;display:flex;flex-direction:column;gap:18px}
.single{max-width:760px;margin:0 auto;padding:36px 24px 72px}

/* ---------- Article typography ---------- */
.crumb{margin:0 0 14px;font-size:13px;font-weight:600;color:var(--mute)}
.crumb a{color:var(--mute)}
h1{margin:0 0 16px;font-size:42px;line-height:1.1;font-weight:800;letter-spacing:-1.2px}
h2{margin:44px 0 12px;font-size:28px;line-height:1.25;font-weight:800;letter-spacing:-.5px}
h3{margin:26px 0 6px;font-size:20px;line-height:1.3;font-weight:700}
p{margin:0 0 16px}
main p,main li,main dd{color:var(--text)}
.lead{font-size:20px;line-height:1.55;color:var(--text)}
.byline{display:flex;align-items:center;gap:12px;padding:0 0 24px;margin:0 0 8px;border-bottom:1px solid var(--line);font-size:14px;color:var(--mute)}
.byline img{width:36px;height:36px;border-radius:10px}
.byline b{color:var(--ink)}
ul,ol{padding-left:22px;margin:0 0 16px}
li{margin-bottom:6px}
b,strong{color:var(--ink)}
code{font-family:var(--mono);font-size:.88em;background:var(--soft);border:1px solid var(--line);padding:1px 6px;border-radius:5px;color:var(--ink)}
.formula{display:block;font-family:var(--mono);font-size:16px;background:var(--soft);border-radius:12px;padding:16px 18px;margin:0 0 18px;overflow-x:auto;white-space:nowrap;color:var(--ink)}

/* ---------- Boxes ---------- */
.box{background:var(--lime-l);border-radius:14px;padding:16px 20px;margin:20px 0}
.box.warn{background:#fff7e6}
.box p:last-child{margin-bottom:0}

/* ---------- Spreadsheet tables ---------- */
.sheetwrap{overflow-x:auto;margin:6px 0 18px}
table.sheet{border-collapse:collapse;font-size:15px;background:#fff;min-width:300px;font-family:var(--font)}
.sheet th,.sheet td{border:1px solid #e6e8e3;padding:6px 12px;white-space:nowrap}
.sheet thead th,.sheet tbody th{background:var(--head);color:var(--mute);font-weight:600;font-size:12px;text-align:center}
.sheet tbody th{width:34px}
.sheet td.h{font-weight:700;color:var(--ink)}
.sheet td.n{text-align:right}
.sheet td.hl{background:#fff8e1;font-weight:600}
.sheet td.lu{background:#f1f8ea}
.sheet td.res{background:var(--lime-ll);font-weight:700;box-shadow:inset 0 0 0 2px var(--lime-d)}

/* ---------- Data tables ---------- */
.tablewrap{overflow-x:auto;margin:6px 0 20px}
table.data{border-collapse:collapse;width:100%;font-size:15px}
.data th,.data td{border-bottom:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.data th{font-size:13px;text-transform:uppercase;letter-spacing:.4px;color:var(--mute);border-bottom:2px solid var(--line)}
.data td{color:var(--text)}

/* ---------- Table of contents ---------- */
.toc-side{padding:0}
.toc-side p,.toc-inline summary{margin:0 0 10px;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--mute)}
.toc-side p{padding-left:12px}
.toc-side ol{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px;font-size:14px;line-height:1.35;counter-reset:toc}
.toc-side li{margin:0;counter-increment:toc}
.toc-side ol a{display:flex;gap:10px;align-items:baseline;color:var(--mute);text-decoration:none;padding:7px 12px;border-radius:8px;border-left:3px solid transparent;transition:background .15s,color .15s}
.toc-side ol a::before{content:counter(toc,decimal-leading-zero);font-family:var(--mono);font-size:11px;color:#a3a99e;min-width:16px}
.toc-side ol a:hover{background:var(--soft);color:var(--ink)}
.toc-side ol a.active{background:var(--lime-l);color:var(--ink);font-weight:600;border-left-color:var(--lime)}
.toc-side ol a.active::before{color:var(--lime-d)}
.toc-top{display:inline-block;margin:10px 0 0 12px;font-size:13px;color:var(--mute);text-decoration:none}
.toc-top:hover{color:var(--green)}
.toc-inline{display:none;border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:20px 0 0}
.toc-inline summary{cursor:pointer;margin:0}
.toc-inline ol{margin:10px 0 0;font-size:15px}

/* ---------- Cards (hub / homepage) ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;margin:18px 0}
.card{display:block;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;text-decoration:none;color:var(--ink);box-shadow:0 8px 24px rgba(27,31,25,.05)}
.card:hover{border-color:var(--lime)}
.card b{display:block;font-size:18px;color:var(--green);margin-bottom:4px}
.card span{font-size:15px;color:var(--text)}

/* ---------- CTA components (design 1) – currently not placed on pages.
   To switch one on: uncomment its block in the page (search for "CTA:"). ---------- */
.cta-side{border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:0 8px 24px rgba(27,31,25,.06)}
.cta-side img{width:52px;height:52px;border-radius:14px;margin-bottom:10px}
.cta-side .t{margin:0 0 6px;font-size:18px;font-weight:800;color:var(--ink)}
.cta-side .s{margin:0 0 14px;font-size:14px;color:var(--text)}
.progress{display:flex;gap:6px;margin:0 0 16px}
.progress span{flex:1;height:8px;border-radius:99px;background:var(--line)}
.progress span.on{background:var(--lime)}

.cta-mid{background:var(--ink);color:#fff;border-radius:24px;padding:26px;margin:36px 0;display:flex;gap:22px;flex-wrap:wrap;align-items:center}
.cta-mid .copy{flex:1 1 300px}
.cta-mid .k{margin:0 0 6px;font-size:13px;font-weight:800;letter-spacing:1px;text-transform:uppercase;color:#9be06b}
.cta-mid .t{margin:0 0 8px;font-size:24px;font-weight:800;line-height:1.2;color:#fff}
.cta-mid .s{margin:0 0 16px;color:#cfd8c8;font-size:15px}
.cta-mid .progress span{max-width:44px;height:10px;background:#3a4934}
.cta-mid .progress span.on{background:var(--lime)}
.cta-mid img{width:120px;height:120px;border-radius:28px}

.cta-end{margin:44px 0 0;border:3px solid var(--lime);border-radius:24px;padding:26px;text-align:center}
.cta-end .t{margin:0 0 6px;font-size:26px;font-weight:800;color:var(--ink)}
.cta-end .s{margin:0 0 18px;color:var(--text);font-size:16px}

/* ---------- Footer ---------- */
footer{border-top:1px solid var(--line);font-size:14px;color:var(--mute)}
footer .in{max-width:1160px;margin:0 auto;padding:22px 24px}
footer p{margin:0 0 6px}
footer .in{display:flex;flex-wrap:wrap;justify-content:space-between;gap:6px 24px}
footer .langs a{color:var(--mute)}
footer .langs span{color:var(--ink);font-weight:600}

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .layout{display:block;padding-top:24px}
  .sidebar{display:none}
  .toc-inline{display:block}
}
@media (max-width:640px){
  body{font-size:16px}
  .top .in{flex-wrap:wrap;gap:10px;padding:8px 12px}
  .top nav{margin-left:auto}
  .fx-search{order:3;flex:1 1 100%;max-width:none}
  h1{font-size:30px;letter-spacing:-.6px}
  h2{font-size:23px}
  .lead{font-size:17px}
  .layout,.single{padding:20px 16px 56px}
}
.sheet td.err{color:var(--err);font-weight:600}

/* ---------- Hub pages (functions / basics) ---------- */
.wide{max-width:1160px;margin:0 auto;padding:36px 24px 72px}
.wide .lead{max-width:760px}
.hub-tools{display:flex;flex-direction:column;gap:14px;margin:24px 0 8px;padding:16px;background:var(--soft);border-radius:16px}
.hub-search{display:flex;align-items:stretch;border:1px solid var(--line-2);border-radius:8px;overflow:hidden;background:#fff;max-width:520px}
.hub-search:focus-within{border-color:var(--lime-d);box-shadow:0 0 0 3px rgba(108,194,58,.25)}
.hub-search .fx{background:#eef1eb;color:#5f665b;font-family:var(--mono);font-style:italic;padding:10px 12px;border-right:1px solid var(--line-2);display:flex;align-items:center}
.hub-search input{border:0;outline:none;padding:10px 12px;font-size:15px;flex:1;min-width:0;font-family:var(--font)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 12px;font-size:14px;font-weight:600;color:var(--ink);text-decoration:none}
.chip:hover{border-color:var(--lime);color:var(--ink)}
.chip span{font-size:12px;font-weight:700;color:var(--mute);background:var(--soft);border-radius:999px;padding:0 7px}
.hub-popular h2,.fn-group h2{margin-top:36px}
.fn-group{scroll-margin-top:84px}
.fn-head{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;border-bottom:2px solid var(--line);padding-bottom:8px;margin:36px 0 6px}
.fn-head h2{margin:0;font-size:22px}
.fn-head p{margin:0;color:var(--mute);font-size:15px}
.fn-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));column-gap:28px}
.fn-item{margin:0;border-bottom:1px solid var(--line)}
.fn-item a{display:flex;flex-direction:column;gap:2px;padding:12px 10px;text-decoration:none;border-radius:8px;color:var(--ink)}
.fn-item a:hover{background:var(--lime-l)}
.fn-item b{font-family:var(--mono);font-size:15px;color:var(--green)}
.fn-item span{font-size:14px;color:var(--text)}
.fn-empty{margin:24px 0;color:var(--mute)}
.hub-other{margin:48px 0 0;padding:18px 20px;border:1px solid var(--line);border-radius:14px;font-size:15px;color:var(--text)}
@media (max-width:640px){.wide{padding:20px 16px 56px}.fn-list{grid-template-columns:1fr}}