[hidden]{display:none!important}
:root{
 --ink:#0f1b2d;--ink-2:#33425a;--muted:#5d6b80;--line:#d9e0ea;--grid:#e8edf4;
 --paper:#f7f9fc;--card:#ffffff;--teal:#0b8f86;--teal-2:#0a6f69;--amber:#f2a516;--amber-2:#c98500;
 --violet:#5b4bd6;--coral:#e4572e;--code:#0f1b2d;--code-ink:#e6edf7;
 --r:14px;--shadow:0 1px 2px rgba(15,27,45,.06),0 8px 24px rgba(15,27,45,.06);
 --f-head:"Space Grotesk",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
 --f-body:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
 --f-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.65 var(--f-body);color:var(--ink);background:var(--paper);
 background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
 background-size:32px 32px;background-attachment:fixed}
a{color:var(--teal-2)}a:hover{color:var(--teal)}
img,svg{max-width:100%}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:#fff;padding:8px;z-index:99}
/* header */
.hdr{position:sticky;top:0;z-index:50;background:rgba(247,249,252,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;gap:20px;height:64px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font:700 20px var(--f-head);letter-spacing:-.02em}
.logo b{color:var(--teal)}
.nav{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav a{padding:8px 12px;border-radius:8px;text-decoration:none;color:var(--ink-2);font-weight:500;font-size:15px}
.nav a:hover,.nav a[aria-current]{background:#e9eef6;color:var(--ink)}
.lang{border:1.5px solid var(--ink);color:var(--ink)!important;font:600 13px var(--f-mono)!important;padding:6px 10px!important}
.menu-btn{display:none;margin-left:auto;background:none;border:1.5px solid var(--line);border-radius:8px;padding:8px 10px;font:600 14px var(--f-body);color:var(--ink)}
@media(max-width:900px){.menu-btn{display:block}.nav{display:none;position:absolute;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--paper);border-bottom:1px solid var(--line);padding:12px 20px}.nav.open{display:flex}}
/* hero */
.hero{padding:64px 0 40px}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr}}
.eyebrow{display:inline-flex;gap:8px;align-items:center;font:600 12px var(--f-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--teal-2);background:#dff3f1;padding:6px 10px;border-radius:999px}
h1,h2,h3{font-family:var(--f-head);letter-spacing:-.02em;line-height:1.2}
.hero h1{font-size:clamp(34px,5vw,56px);margin:16px 0}
.hero h1 em{font-style:normal;background:linear-gradient(transparent 62%,#ffd77a 62%)}
.lead{font-size:19px;color:var(--ink-2);max-width:580px}
.btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 18px;border-radius:10px;font-weight:600;text-decoration:none;border:1.5px solid var(--ink);color:var(--ink);background:#fff;cursor:pointer;font-size:15px}
.btn.primary{background:var(--ink);color:#fff}.btn.primary:hover{background:var(--teal-2);border-color:var(--teal-2);color:#fff}
.btn:hover{transform:translateY(-1px)}
/* hero widget */
.hero-card{background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:18px}
.hc-top{display:flex;justify-content:space-between;align-items:center;font:600 12px var(--f-mono);color:var(--muted);margin-bottom:12px}
.dots i{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:5px;background:var(--line)}
.kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:12px}
.kpi{border:1px solid var(--line);border-radius:10px;padding:10px}
.kpi small{display:block;font:600 11px var(--f-mono);color:var(--muted);text-transform:uppercase}
.kpi strong{font:700 22px var(--f-head)}
.kpi .up{color:var(--teal);font-size:12px;font-weight:600}.kpi .down{color:var(--coral);font-size:12px;font-weight:600}
/* sections */
section{padding:36px 0}
.sec-head{display:flex;justify-content:space-between;align-items:end;gap:16px;margin-bottom:20px}
.sec-head h2{font-size:clamp(26px,3vw,34px);margin:0}
.sec-head p{margin:4px 0 0;color:var(--muted)}
.grid{display:grid;gap:18px}
.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}.g2{grid-template-columns:repeat(2,1fr)}
@media(max-width:900px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--shadow);text-decoration:none;color:var(--ink);display:flex;flex-direction:column;transition:transform .15s,border-color .15s}
a.card:hover{transform:translateY(-3px);border-color:var(--teal);color:var(--ink)}
.card h3{margin:8px 0 6px;font-size:19px}
.card p{margin:0;color:var(--muted);font-size:15px}
.card .more{margin-top:auto;padding-top:14px;font-weight:600;color:var(--teal-2);font-size:14px}
.tag{display:inline-block;font:600 11px var(--f-mono);text-transform:uppercase;letter-spacing:.06em;padding:4px 8px;border-radius:6px;background:#eef1f7;color:var(--ink-2)}
.tag.excel{background:#e2f4e8;color:#17703a}.tag.power-bi{background:#fff2d1;color:#8a5a00}.tag.bi-tools{background:#ebe8ff;color:#4433b3}
.tag.sql{background:#e0f0ff;color:#0b5aa8}.tag.python-ai{background:#ffe8e0;color:#a63a17}.tag.career{background:#eef1f7;color:#33425a}
.icon{width:42px;height:42px;border-radius:10px;display:grid;place-items:center;font:700 16px var(--f-mono);color:#fff}
/* path */
.path{display:grid;grid-template-columns:repeat(5,1fr);gap:0;counter-reset:s}
.step{position:relative;padding:18px;border:1px solid var(--line);background:#fff;margin-right:-1px}
.step:first-child{border-radius:var(--r) 0 0 var(--r)}.step:last-child{border-radius:0 var(--r) var(--r) 0}
.step b{font:700 12px var(--f-mono);color:var(--teal-2)}
.step h3{margin:6px 0;font-size:17px}.step p{margin:0;font-size:14px;color:var(--muted)}
@media(max-width:900px){.path{grid-template-columns:1fr}.step{margin:0 0 -1px;border-radius:0!important}.step:first-child{border-radius:var(--r) var(--r) 0 0!important}.step:last-child{border-radius:0 0 var(--r) var(--r)!important}}
/* article */
.crumbs{font-size:14px;color:var(--muted);padding-top:24px}.crumbs a{color:var(--muted)}
.post-head{padding:12px 0 8px;max-width:780px}
.post-head h1{font-size:clamp(30px,4.4vw,46px);margin:12px 0}
.meta{font-size:14px;color:var(--muted);display:flex;flex-wrap:wrap;gap:14px}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:40px;align-items:start;padding-bottom:40px}
@media(max-width:1000px){.layout{grid-template-columns:1fr}}
.article{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:clamp(20px,4vw,44px);box-shadow:var(--shadow);font-size:17px}
.article h2{font-size:28px;margin:40px 0 12px;padding-top:8px}
.article h2:first-child{margin-top:0}
.article h3{font-size:21px;margin:28px 0 8px}
.article p,.article li{color:#1f2c40}
.article table{width:100%;border-collapse:collapse;margin:20px 0;font-size:15px;display:block;overflow-x:auto}
.article th,.article td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.article th{background:#f0f4f9;font-family:var(--f-head)}
pre{background:var(--code);color:var(--code-ink);padding:18px;border-radius:12px;overflow-x:auto;font:14px/1.6 var(--f-mono);position:relative}
code{font-family:var(--f-mono);font-size:.9em}
:not(pre)>code{background:#eef2f8;padding:2px 6px;border-radius:5px;color:#0b4f73}
.copy{position:absolute;top:8px;right:8px;background:#26364f;color:#cfe;border:0;border-radius:6px;font:600 11px var(--f-mono);padding:5px 8px;cursor:pointer}
blockquote{border-left:4px solid var(--amber);margin:20px 0;padding:6px 18px;background:#fff8e8;border-radius:0 10px 10px 0}
.tip,.ai-tip{padding:14px 18px;border-radius:12px;margin:22px 0;border:1px solid}
.tip{background:#e9f7f5;border-color:#b9e4df}
.ai-tip{background:#f0edff;border-color:#d4cdfb}
.ai-tip::before{content:"✦ ";color:var(--violet);font-weight:700}
.aff{border:1.5px dashed var(--line);border-radius:14px;padding:16px 18px;margin:26px 0;background:#fcfdff}
.aff h4{margin:0 0 4px;font:700 16px var(--f-head)}.aff p{margin:0 0 10px;font-size:14px;color:var(--muted)}
.aff ul{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:8px}
.aff a{display:inline-block;padding:8px 12px;border-radius:8px;border:1px solid var(--line);background:#fff;text-decoration:none;font-weight:600;font-size:14px;color:var(--ink)}
.aff a:hover{border-color:var(--teal)}
.aff small{display:block;margin-top:8px;color:var(--muted);font-size:12px}
.faq details{border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:10px 0;background:#fff}
.faq summary{font-weight:600;cursor:pointer}
.side{position:sticky;top:84px;display:flex;flex-direction:column;gap:18px}
.side .card{padding:16px}
.toc ol{padding-left:18px;margin:8px 0 0;font-size:14px}.toc a{color:var(--ink-2);text-decoration:none}.toc a:hover{color:var(--teal)}
.related a{display:block;padding:8px 0;border-bottom:1px solid var(--grid);text-decoration:none;color:var(--ink);font-size:14px;font-weight:500}
.adslot{min-height:0}
/* tools */
.tool{background:#fff;border:1px solid var(--line);border-radius:18px;padding:clamp(18px,3vw,32px);box-shadow:var(--shadow)}
label{display:block;font-weight:600;font-size:14px;margin:12px 0 6px}
input,select,textarea{width:100%;padding:11px 12px;border:1.5px solid var(--line);border-radius:10px;font:15px var(--f-body);background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--teal)}
.row{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px}
.out{margin-top:18px}
.result-box{background:#f0f8f7;border:1px solid #b9e4df;border-radius:12px;padding:16px;margin-top:14px}
.big{font:700 34px var(--f-head)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.chip{border:1.5px solid var(--line);background:#fff;border-radius:999px;padding:7px 13px;font:600 13px var(--f-body);cursor:pointer;color:var(--ink-2)}
.chip.on{background:var(--ink);border-color:var(--ink);color:#fff}
.fx{border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin:10px 0;background:#fff}
.fx h3{margin:0 0 4px;font:600 17px var(--f-mono);color:var(--teal-2)}.fx p{margin:4px 0;font-size:15px}
.cmp{width:100%;border-collapse:collapse;font-size:14px}.cmp th,.cmp td{border:1px solid var(--line);padding:10px;text-align:left}.cmp th{background:#f0f4f9}
.tablewrap{overflow-x:auto}
/* demo dashboards */
.dash{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:var(--shadow)}
.dash-controls{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:14px}
.dash-controls select{width:auto}
.dgrid{display:grid;grid-template-columns:2fr 1fr;gap:14px}
@media(max-width:800px){.dgrid{grid-template-columns:1fr}}
.panel{border:1px solid var(--line);border-radius:12px;padding:14px}
.panel h4{margin:0 0 8px;font:600 13px var(--f-mono);color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.chart text{font:11px var(--f-body);fill:var(--muted)}
.bars rect:hover{opacity:.8}
.legend{display:flex;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--muted)}.legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:6px}
/* store */
.price{font:700 26px var(--f-head);margin:8px 0}
.badge{position:absolute;top:14px;right:14px;background:var(--amber);color:var(--ink);font:700 11px var(--f-mono);padding:4px 8px;border-radius:6px}
/* footer */
.ftr{margin-top:40px;background:var(--ink);color:#c6d0de;padding:44px 0 24px;font-size:14px}
.ftr a{color:#e6edf7;text-decoration:none}.ftr a:hover{color:var(--amber)}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
@media(max-width:800px){.fgrid{grid-template-columns:1fr 1fr}}
.ftr h4{color:#fff;font:600 14px var(--f-head);margin:0 0 10px}
.ftr ul{list-style:none;padding:0;margin:0}.ftr li{margin:6px 0}
.fbot{border-top:1px solid #26364f;margin-top:28px;padding-top:18px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;font-size:13px}
.disclose{font-size:12px;color:#93a1b5;margin-top:10px}
.page{padding:28px 0 40px;max-width:820px}
.page h1{font-size:clamp(30px,4vw,44px)}
.cat-filter{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px}
.search{max-width:420px;margin-bottom:12px}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}

.videos{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-top:32px}.videos h2{grid-column:1/-1;margin:0!important}.videos .yt-wrap{margin:0}
.yt-wrap{margin:18px 0;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff}
.yt{position:relative;aspect-ratio:16/9;background:#0f1b2d;cursor:pointer;max-width:100%}
.yt img{width:100%;height:100%;object-fit:cover;display:block;opacity:.88}
.yt iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.yt-play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:68px;height:48px;border-radius:12px;background:#e4572e;color:#fff;display:grid;place-items:center;font-size:22px;box-shadow:0 6px 20px rgba(0,0,0,.3)}
.yt:hover .yt-play,.yt:focus .yt-play{background:#c2401c}
.yt-wrap figcaption{padding:12px 14px;display:flex;flex-direction:column;gap:2px;font-size:14px}
.yt-wrap figcaption span,.yt-wrap figcaption small{color:var(--muted)}
.vgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.vgrid .yt-wrap{margin:0}
.rank-card{display:grid;grid-template-columns:auto minmax(0,1fr);gap:18px;align-items:start}
.badge-r{width:64px;height:64px;border-radius:16px;display:grid;place-items:center;color:#fff;font:700 26px var(--f-head)}
.bar{height:10px;background:var(--grid);border-radius:99px;overflow:hidden;margin:8px 0 4px}.bar i{display:block;height:100%;background:var(--teal);border-radius:99px;width:0;transition:width .4s}
.mlist{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px;margin-top:12px}
.mlist a{display:flex;gap:10px;align-items:center;border:1px solid var(--line);border-radius:10px;padding:10px 12px;text-decoration:none;color:var(--ink);background:#fff;font-size:14px;font-weight:500}
.mlist a:hover{border-color:var(--teal)}.mlist a .st{flex:none;width:22px;height:22px;border-radius:50%;border:2px solid var(--line);display:grid;place-items:center;font-size:12px}
.mlist a.done .st{background:var(--teal);border-color:var(--teal);color:#fff}
.lessons{margin:10px 0 0;padding-left:0;list-style:none;display:grid;gap:6px}
.lessons a{text-decoration:none;color:var(--ink);font-size:15px}.lessons li{display:flex;gap:8px;align-items:center}.lessons .ck{color:var(--muted)}.lessons li.done .ck{color:var(--teal)}
.qopt{display:flex;gap:10px;align-items:flex-start;border:1.5px solid var(--line);border-radius:10px;padding:10px 12px;margin:6px 0;cursor:pointer;font-weight:500;background:#fff}
.qopt input{width:auto;margin-top:4px}.qopt.right{border-color:var(--teal);background:#e9f7f5}.qopt.wrong{border-color:var(--coral);background:#fdeee9}
.qexp{font-size:14px;color:var(--ink-2);margin:6px 0 0}
.glo{border-bottom:1px solid var(--grid);padding:12px 0}.glo h3{margin:0 0 4px;font-size:18px}.glo p{margin:0;color:var(--ink-2)}
.letters{display:flex;flex-wrap:wrap;gap:4px;margin:10px 0 18px}.letters a{font:600 13px var(--f-mono);padding:5px 8px;border:1px solid var(--line);border-radius:6px;text-decoration:none;color:var(--ink);background:#fff}
.markread{margin-top:28px;display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;border:1.5px solid var(--line);border-radius:14px;padding:16px 18px;background:#fbfcfe}
.ds-files{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}.ds-files a{font:600 13px var(--f-mono);padding:7px 10px;border:1px solid var(--line);border-radius:8px;text-decoration:none;background:#fff;color:var(--ink)}