:root{
  --void:#0b0a0a;
  --dark:#131212;
  --dark-2:#1B1A1A;
  --card:#201f1f;
  --card-2:#272525;
  --ink-1:#f4f3f2;
  --ink-2:#b8b4b1;
  --ink-3:#8a8582;
  --ink-4:#625d5b;
  --purple:#6239d5;
  --purple-light:#8a6bf0;
  --purple-dark:#4a27ad;
  --teal:#03baa9;
  --teal-dark:#029a8c;
  --teal-light:#22e0cd;
  --gold:#d4a017;
  --white:#ffffff;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --r-pill:100px;
  --r-sm:12px;
  --r-card:18px;
  --font-display:'Outfit','Segoe UI',system-ui,sans-serif;
  --font-body:'Geist','Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --ease-out-expo:cubic-bezier(.16,1,.3,1);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--dark);
  color:var(--ink-2);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border-radius:var(--r-sm);}
a{color:var(--purple-light);text-decoration:none;}
a:hover{color:var(--teal-light);}
h1,h2,h3,h4,h5{font-family:var(--font-display);color:var(--white);font-weight:600;line-height:1.2;margin:0 0 .5em;}
.container{max-width:1080px;margin:0 auto;padding:0 24px;}
.small{max-width:960px;}

/* ---------- Nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(19,18,18,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);}
.nav-inner{max-width:1080px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:20px;}
.nav-logo{display:flex;align-items:center;flex-shrink:0;}
.nav-logo img{height:36px;width:auto;border-radius:0;}
.nav-crumb{color:var(--ink-3);font-size:14px;white-space:nowrap;}
.nav-crumb b{color:var(--ink-1);font-weight:500;}
.nav-spacer{flex:1;}
.nav-back{font-size:14px;color:var(--ink-2);border:1px solid var(--line-strong);padding:8px 16px;border-radius:var(--r-pill);white-space:nowrap;}
.nav-back:hover{color:var(--white);border-color:var(--purple-light);}

/* ---------- Search ---------- */
.search-wrap{position:relative;max-width:560px;margin:0 auto;}
.search-input{
  width:100%;padding:16px 20px;border-radius:var(--r-pill);
  border:1px solid var(--line-strong);background:var(--card);color:var(--ink-1);
  font-family:var(--font-body);font-size:16px;outline:none;transition:border-color .2s var(--ease-out-expo);
}
.search-input:focus{border-color:var(--purple-light);}
.search-input::placeholder{color:var(--ink-4);}
.search-results{
  position:absolute;top:calc(100% + 8px);left:0;right:0;background:var(--card-2);
  border:1px solid var(--line-strong);border-radius:var(--r-card);overflow:hidden;
  box-shadow:0 20px 50px rgba(0,0,0,.5);z-index:60;display:none;max-height:420px;overflow-y:auto;
}
.search-results.open{display:block;}
.search-result{display:block;padding:14px 20px;border-bottom:1px solid var(--line);}
.search-result:last-child{border-bottom:none;}
.search-result:hover{background:rgba(255,255,255,.04);}
.search-result-title{color:var(--ink-1);font-weight:500;font-size:14.5px;}
.search-result-cat{color:var(--ink-4);font-size:12px;text-transform:uppercase;letter-spacing:.04em;margin-top:2px;}
.search-empty{padding:16px 20px;color:var(--ink-4);font-size:14px;}

/* ---------- Hero ---------- */
.hero{padding:72px 0 48px;text-align:center;}
.hero .eyebrow{
  display:inline-flex;align-items:center;gap:8px;color:var(--purple-light);
  font-size:13px;font-weight:500;letter-spacing:.02em;margin-bottom:18px;
  border:1px solid var(--line-strong);padding:6px 16px;border-radius:var(--r-pill);
}
.hero h1{font-size:clamp(30px,5vw,44px);max-width:16ch;margin:0 auto 16px;}
.hero p{color:var(--ink-3);max-width:52ch;margin:0 auto 34px;font-size:17px;}

/* ---------- Category grid ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin:40px 0;}
.cat-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;transition:border-color .2s var(--ease-out-expo),transform .2s var(--ease-out-expo);
}
.cat-card:hover{border-color:var(--purple-light);transform:translateY(-2px);}
.cat-card h3{font-size:18px;margin-bottom:6px;}
.cat-card p{color:var(--ink-3);font-size:14px;margin:0 0 14px;}
.cat-card .count{color:var(--ink-4);font-size:12.5px;text-transform:uppercase;letter-spacing:.04em;}
.cat-icon{
  width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--purple),var(--purple-dark));
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;color:var(--white);font-weight:700;font-family:var(--font-display);
}

/* ---------- Page layout (category / article) ---------- */
.page{padding:40px 0 100px;}
.breadcrumb{color:var(--ink-4);font-size:13.5px;margin-bottom:20px;}
.breadcrumb a{color:var(--ink-3);}
.breadcrumb a:hover{color:var(--purple-light);}
.page-title{font-size:clamp(26px,4vw,36px);margin-bottom:8px;}
.page-desc{color:var(--ink-3);margin-bottom:36px;max-width:64ch;}

.article-list{display:flex;flex-direction:column;gap:2px;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);}
.article-row{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;background:var(--card);border-bottom:1px solid var(--line);
}
.article-row:last-child{border-bottom:none;}
.article-row:hover{background:var(--card-2);}
.article-row-title{color:var(--ink-1);font-weight:500;font-size:15.5px;}
.article-row-arrow{color:var(--ink-4);flex-shrink:0;}
.article-row:hover .article-row-arrow{color:var(--purple-light);}

/* ---------- Article content ---------- */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:56px;align-items:start;}
@media (max-width:860px){.article-layout{grid-template-columns:1fr;}}
.article-meta{color:var(--ink-4);font-size:13px;margin-bottom:28px;}
.article-body{max-width:70ch;}
.article-body h1{font-size:28px;}
.article-body h2{font-size:22px;margin-top:1.6em;}
.article-body h3{font-size:18px;margin-top:1.4em;}
.article-body p{margin:0 0 1.1em;}
.article-body ul,.article-body ol{margin:0 0 1.1em;padding-left:1.3em;}
.article-body li{margin-bottom:.5em;}
.article-body li::marker{color:var(--purple-light);}
.article-body strong{color:var(--ink-1);font-weight:600;}
.article-body img{margin:1.4em 0;border:1px solid var(--line);}
.article-body code{background:rgba(98,57,213,.12);border:1px solid rgba(98,57,213,.25);color:var(--purple-light);padding:.15em .4em;border-radius:6px;font-size:.9em;}
.article-body pre{background:var(--card);border:1px solid var(--line);border-radius:var(--r-sm);padding:16px;overflow-x:auto;}
.article-body pre code{background:none;border:none;padding:0;}
.article-body blockquote{
  margin:1.4em 0;padding:14px 20px;background:rgba(98,57,213,.08);
  border-left:3px solid var(--purple);border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--ink-2);
}
.article-body blockquote p{margin:0;}
.article-body a{border-bottom:1px solid rgba(138,107,240,.35);}
.article-body table{width:100%;border-collapse:collapse;margin:1.2em 0;font-size:14.5px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:8px 12px;text-align:left;}
.article-body th{background:var(--card);color:var(--ink-1);}
.article-body hr{border:none;border-top:1px solid var(--line);margin:2em 0;}

.sidebar{position:sticky;top:96px;}
.sidebar h4{font-size:13px;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-4);margin-bottom:14px;}
.sidebar-list{display:flex;flex-direction:column;gap:2px;}
.sidebar-list a{display:block;padding:9px 0;font-size:14px;color:var(--ink-3);border-bottom:1px solid var(--line);}
.sidebar-list a:hover{color:var(--purple-light);}
.sidebar-list a.active{color:var(--white);font-weight:500;}

.help-cta{
  margin-top:56px;padding:28px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);text-align:center;
}
.help-cta h4{margin-bottom:6px;}
.help-cta p{color:var(--ink-3);margin-bottom:18px;font-size:14.5px;}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 22px;border-radius:var(--r-pill);font-size:14.5px;font-weight:500;font-family:var(--font-body);}
.btn-primary{background:linear-gradient(135deg,var(--purple-light),var(--purple));color:var(--white);}
.btn-primary:hover{color:var(--white);filter:brightness(1.08);}
.btn-ghost{border:1px solid var(--line-strong);color:var(--ink-2);margin-left:8px;}
.btn-ghost:hover{color:var(--white);border-color:var(--purple-light);}

/* ---------- Footer ---------- */
.footer{border-top:1px solid var(--line);padding:36px 0;margin-top:40px;}
.footer-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;color:var(--ink-4);font-size:13px;}
.footer-inner a{color:var(--ink-3);}
.footer-inner a:hover{color:var(--purple-light);}

@media (max-width:600px){
  .nav-crumb{display:none;}
  .hero{padding:48px 0 32px;}
}