/* =========================================================
   Refopedia — shared design system
   Editorial minimalism: warm monochrome, serif display,
   no gradients, no heavy shadows, generous whitespace.
   ========================================================= */
:root{
  --bg:#FBFBFA; --surface:#FFFFFF; --surface2:#F9F9F8; --bone:#F7F6F3;
  --line:#EAEAEA; --line-soft:rgba(0,0,0,.06);
  --ink:#2F3437; --ink-strong:#111111; --muted:#787774;
  --red-bg:#FDEBEC; --red:#9F2F2D;
  --blue-bg:#E1F3FE; --blue:#1F6C9F;
  --green-bg:#EDF3EC; --green:#346538;
  --yellow-bg:#FBF3DB; --yellow:#956400;
  --serif:'Newsreader',Georgia,'Times New Roman',serif;
  --sans:'Helvetica Neue','Switzer',system-ui,-apple-system,sans-serif;
  --mono:'JetBrains Mono','SF Mono',monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--ink);
  line-height:1.6;-webkit-font-smoothing:antialiased;font-size:16px}
a{color:inherit;text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 28px}
.reveal{opacity:0;transform:translateY(12px);
  transition:opacity .6s cubic-bezier(.16,1,.3,1),transform .6s cubic-bezier(.16,1,.3,1)}
.reveal.in{opacity:1;transform:none}

/* icons */
.ico{width:20px;height:20px;flex:none;stroke:currentColor;stroke-width:1.6;
  fill:none;stroke-linecap:round;stroke-linejoin:round}

/* ---------- nav ---------- */
header.nav{position:sticky;top:0;z-index:50;background:rgba(251,251,250,.8);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.navrow{display:flex;align-items:center;gap:32px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;font-size:18px;
  letter-spacing:-.01em;color:var(--ink-strong)}
.brand .mk{width:26px;height:26px;border:1px solid var(--ink-strong);border-radius:6px;
  display:grid;place-items:center}
.brand .mk .ico{width:15px;height:15px;stroke-width:1.8}
.navlinks{display:flex;gap:28px;margin-left:auto;font-size:14px;color:var(--muted)}
.navlinks a:hover{color:var(--ink)}
.nav-cta{font-size:13px;color:var(--ink);border:1px solid var(--line);
  border-radius:6px;padding:8px 14px;background:var(--surface)}
.nav-cta:hover{border-color:#d9d9d9}

/* ---------- hero ---------- */
.hero{padding:96px 0 64px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(620px 300px at 50% -8%,rgba(150,100,0,.04),transparent 70%)}
.hero .inner{max-width:780px;margin:0 auto;text-align:center;position:relative}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--muted);margin-bottom:22px}
.hero h1{font-family:var(--serif);font-weight:400;font-size:60px;line-height:1.08;
  letter-spacing:-.025em;color:var(--ink-strong)}
.hero h1 em{font-style:italic;color:var(--muted)}
.hero .sub{font-size:18px;color:var(--muted);margin:24px auto 0;max-width:560px;line-height:1.55}

/* search */
.search{margin:40px auto 0;max-width:600px;display:flex;align-items:center;gap:12px;
  background:var(--surface);border:1px solid var(--line);border-radius:10px;
  padding:8px 8px 8px 18px;transition:border-color .2s}
.search:focus-within{border-color:#c9c9c9}
.search .ico{color:var(--muted)}
.search input{flex:1;border:none;outline:none;background:none;font-family:var(--sans);
  font-size:16px;color:var(--ink);padding:10px 0}
.search input::placeholder{color:#a8a6a1}
.search button{font-family:var(--sans);font-size:14px;font-weight:500;
  background:var(--ink-strong);color:#fff;border:none;border-radius:6px;
  padding:11px 22px;cursor:pointer;transition:background .2s,transform .1s}
.search button:hover{background:#333}
.search button:active{transform:scale(.98)}
.examples{margin-top:18px;font-family:var(--mono);font-size:12.5px;color:var(--muted)}
.examples a{border-bottom:1px solid var(--line);padding-bottom:1px;margin:0 4px}
.examples a:hover{color:var(--ink);border-color:var(--ink)}

/* stats */
.stats{display:flex;justify-content:center;gap:56px;margin-top:56px;flex-wrap:wrap}
.stat{text-align:center}
.stat .n{font-family:var(--serif);font-size:30px;color:var(--ink-strong);line-height:1}
.stat .l{font-family:var(--mono);font-size:11px;letter-spacing:.06em;
  text-transform:uppercase;color:var(--muted);margin-top:8px}

/* ---------- section frame ---------- */
section{padding:80px 0}
.sec-head{margin-bottom:40px;max-width:600px}
.sec-head .kicker{font-family:var(--mono);font-size:12px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--muted);margin-bottom:12px}
.sec-head h2{font-family:var(--serif);font-weight:400;font-size:36px;
  letter-spacing:-.02em;line-height:1.15;color:var(--ink-strong)}
.sec-head p{color:var(--muted);margin-top:12px;font-size:16px}

/* ---------- tags ---------- */
.tag{display:inline-block;font-family:var(--mono);font-size:10.5px;letter-spacing:.05em;
  text-transform:uppercase;padding:3px 9px;border-radius:9999px;border:1px solid transparent}
.tag.red{background:var(--red-bg);color:var(--red)}
.tag.blue{background:var(--blue-bg);color:var(--blue)}
.tag.green{background:var(--green-bg);color:var(--green)}
.tag.yellow{background:var(--yellow-bg);color:var(--yellow)}
.tag.gray{background:var(--bone);color:var(--muted);border-color:var(--line)}
.tag.was{color:var(--muted);background:transparent;border:1px solid var(--line);
  text-decoration:line-through}

/* ---------- cards / bento ---------- */
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:12px;
  padding:28px;transition:box-shadow .2s,border-color .2s;cursor:pointer;display:block}
.card:hover{box-shadow:0 2px 8px rgba(0,0,0,.04);border-color:#e0e0e0}
.cat-icon{width:40px;height:40px;border:1px solid var(--line);border-radius:8px;
  display:grid;place-items:center;margin-bottom:18px;background:var(--surface2)}
.cat-icon .ico{width:20px;height:20px;color:var(--ink)}
.card h3{font-size:16px;font-weight:600;color:var(--ink-strong);margin-bottom:5px}
.card p{font-size:13.5px;color:var(--muted);line-height:1.5}
.card .foot{margin-top:18px;font-family:var(--mono);font-size:11.5px;color:var(--muted);
  display:flex;align-items:center;gap:6px}
.card .foot .dot{width:4px;height:4px;border-radius:50%;background:var(--green)}
.col2{grid-column:span 2}.col3{grid-column:span 3}.col4{grid-column:span 4}
.feature{background:var(--bone)}
.feature h3{font-family:var(--serif);font-weight:400;font-size:24px;letter-spacing:-.01em}

/* ---------- faux window / data sample ---------- */
.window{background:var(--surface);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.winbar{display:flex;align-items:center;gap:12px;padding:13px 18px;
  border-bottom:1px solid var(--line);background:var(--surface2)}
.dots{display:flex;gap:7px}
.dots i{width:11px;height:11px;border-radius:50%;background:#e2e2e0;display:block}
.winbar .title{font-family:var(--mono);font-size:12px;color:var(--muted)}
.winbar .pill{margin-left:auto;font-family:var(--mono);font-size:11px;color:var(--green);
  background:var(--green-bg);padding:3px 10px;border-radius:9999px}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:14px 22px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--muted);font-weight:500;background:var(--surface)}
tr:last-child td{border-bottom:none}
td .term{color:var(--ink-strong);font-weight:600}
td.dim{color:var(--muted)}

/* ---------- layout: list + sidebar ---------- */
.layout{display:grid;grid-template-columns:1fr 296px;gap:40px;align-items:start}
.entry{padding:26px 0;border-bottom:1px solid var(--line)}
.entry:first-child{padding-top:0}
.entry .row{display:flex;gap:8px;align-items:center;margin-bottom:12px;flex-wrap:wrap}
.entry h3{font-family:var(--serif);font-weight:400;font-size:23px;letter-spacing:-.015em;
  color:var(--ink-strong);line-height:1.25;margin-bottom:8px}
.entry h3 a:hover{color:var(--muted)}
.entry p{font-size:14.5px;color:var(--muted);line-height:1.55;max-width:600px}
.entry .meta{display:flex;gap:20px;margin-top:16px;font-family:var(--mono);
  font-size:11.5px;color:var(--muted)}
.entry .meta b{color:var(--ink);font-weight:500}

/* sidebar */
.sidebar{position:sticky;top:92px;display:flex;flex-direction:column;gap:20px}
.side{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:22px}
.side h4{font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--muted);margin-bottom:16px}
.side ol{list-style:none;counter-reset:n}
.side li{counter-increment:n;display:flex;gap:12px;padding:10px 0;font-size:14px;
  border-top:1px solid var(--line);cursor:pointer;color:var(--ink)}
.side li:first-child{border-top:none}
.side li::before{content:counter(n,decimal-leading-zero);font-family:var(--mono);
  font-size:12px;color:var(--muted)}
.side li a:hover,.side li:hover{color:var(--ink-strong)}
.side p{font-size:13.5px;color:var(--muted);line-height:1.6}
.side p b{color:var(--ink)}

/* ---------- ad slots (clearly marked) ---------- */
.ad{background:var(--surface2);border:1px solid var(--line);border-radius:10px;
  display:grid;place-items:center;color:#b7b5b0}
.ad span{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase}
.ad.leader{height:90px;margin-bottom:8px}
.ad.rect{height:280px}
.ad.flow{height:110px;margin:26px 0}

/* ---------- why-free band ---------- */
.band{background:var(--bone);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.band .grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
.band .item h3{font-size:15px;font-weight:600;color:var(--ink-strong);margin:14px 0 6px}
.band .item p{font-size:14px;color:var(--muted);line-height:1.6}
.band .item .ico{width:22px;height:22px;color:var(--ink)}

/* ---------- closing CTA ---------- */
.closing{text-align:center;max-width:620px;margin:0 auto}
.closing h2{font-family:var(--serif);font-weight:400;font-size:40px;letter-spacing:-.02em;
  line-height:1.15;color:var(--ink-strong)}
.closing p{color:var(--muted);margin:16px 0 28px;font-size:16px}
.btn-dark{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:500;
  background:var(--ink-strong);color:#fff;border-radius:6px;padding:13px 26px;
  transition:background .2s,transform .1s}
.btn-dark:hover{background:#333}
.btn-dark:active{transform:scale(.98)}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:56px 0 40px;background:var(--surface)}
.fgrid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px}
.fgrid p{font-size:13.5px;color:var(--muted);margin-top:12px;max-width:280px;line-height:1.6}
.fgrid h5{font-size:13px;font-weight:600;color:var(--ink-strong);margin-bottom:14px}
.fgrid a{display:block;font-size:13.5px;color:var(--muted);padding:5px 0}
.fgrid a:hover{color:var(--ink)}
.fbot{margin-top:44px;padding-top:24px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  font-family:var(--mono);font-size:11.5px;color:var(--muted)}

/* =========================================================
   ENTRY DETAIL PAGE
   ========================================================= */
.breadcrumb{font-family:var(--mono);font-size:12px;color:var(--muted);
  padding:28px 0 0;display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.breadcrumb a:hover{color:var(--ink)}
.breadcrumb .sep{opacity:.5}

.article-head{padding:24px 0 36px;border-bottom:1px solid var(--line);max-width:760px}
.article-head .row{display:flex;gap:8px;margin-bottom:18px;flex-wrap:wrap;align-items:center}
.article-head h1{font-family:var(--serif);font-weight:400;font-size:46px;line-height:1.12;
  letter-spacing:-.025em;color:var(--ink-strong)}
.article-head .lede{font-size:18px;color:var(--muted);margin-top:16px;line-height:1.55}
.article-head .byline{display:flex;gap:22px;margin-top:22px;font-family:var(--mono);
  font-size:11.5px;color:var(--muted);flex-wrap:wrap}
.article-head .byline b{color:var(--ink);font-weight:500}

/* article 2-col: prose + TOC/sidebar */
.article-layout{display:grid;grid-template-columns:1fr 260px;gap:48px;
  align-items:start;padding-top:40px}
.prose{max-width:760px;min-width:0}
.prose h2{font-family:var(--serif);font-weight:400;font-size:30px;letter-spacing:-.02em;
  color:var(--ink-strong);margin:48px 0 14px;scroll-margin-top:88px}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:18px;font-weight:600;color:var(--ink-strong);margin:32px 0 10px}
.prose p{font-size:16px;color:var(--ink);margin:14px 0;line-height:1.7}
.prose p.note{font-size:14px;color:var(--muted)}
.prose ul,.prose ol{margin:14px 0 14px 2px;padding-left:20px}
.prose li{font-size:16px;color:var(--ink);margin:8px 0;line-height:1.65}
.prose strong{color:var(--ink-strong);font-weight:600}
.prose code{font-family:var(--mono);font-size:13.5px;background:var(--bone);
  border:1px solid var(--line);border-radius:4px;padding:1px 6px;color:var(--ink-strong)}
.prose a.ref{color:var(--blue);border-bottom:1px solid var(--blue-bg)}
.prose a.ref:hover{border-color:var(--blue)}

/* data table inside prose */
.dtable{border:1px solid var(--line);border-radius:12px;overflow:hidden;margin:22px 0}
.dtable table{font-size:13.5px}
.dtable th{white-space:nowrap}
.dtable td .term{color:var(--ink-strong);font-weight:600}
.dtable .grp{background:var(--bone);font-family:var(--mono);font-size:10.5px;
  letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.scroll-x{overflow-x:auto}

/* callout */
.callout{border:1px solid var(--line);border-left:3px solid var(--yellow);
  background:var(--surface);border-radius:8px;padding:18px 22px;margin:24px 0}
.callout .k{font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;
  text-transform:uppercase;color:var(--yellow);margin-bottom:6px}
.callout p{margin:0;font-size:15px;color:var(--ink)}

/* sources */
.sources{margin:48px 0 0;border-top:1px solid var(--line);padding-top:28px}
.sources h2{font-size:20px !important;margin-top:0 !important}
.sources ol{padding-left:20px}
.sources li{font-size:14px;color:var(--muted);margin:8px 0}
.sources a{color:var(--blue)}
.sources a:hover{text-decoration:underline}

/* TOC sidebar */
.toc{position:sticky;top:92px;display:flex;flex-direction:column;gap:20px}
.toc-card{border:1px solid var(--line);border-radius:12px;padding:20px;background:var(--surface)}
.toc-card h4{font-family:var(--mono);font-size:11px;letter-spacing:.06em;
  text-transform:uppercase;color:var(--muted);margin-bottom:14px}
.toc-card a{display:block;font-size:13.5px;color:var(--muted);padding:6px 0;line-height:1.4;
  border-left:2px solid transparent;padding-left:12px;margin-left:-2px}
.toc-card a:hover,.toc-card a.active{color:var(--ink-strong);border-color:var(--ink-strong)}

/* related entries */
.related{border-top:1px solid var(--line);padding-top:40px}
.related h2{font-family:var(--serif);font-weight:400;font-size:28px;letter-spacing:-.02em;
  color:var(--ink-strong);margin-bottom:24px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}

@media(max-width:920px){
  .bento{grid-template-columns:repeat(2,1fr)}
  .col2,.col3,.col4{grid-column:span 2}
  .layout{grid-template-columns:1fr}
  .sidebar{position:static}
  .band .grid{grid-template-columns:1fr}
  .navlinks{display:none}
  .hero h1{font-size:40px}
  .article-head h1{font-size:34px}
  .article-layout{grid-template-columns:1fr;gap:0}
  .toc{display:none}
  .related-grid{grid-template-columns:1fr}
  .fgrid{grid-template-columns:1fr 1fr}
  .stats{gap:36px}
}