/* ==========================================================================
   BuatSOP RS — Design tokens
   ========================================================================== */
:root{
  --paper:#F4F6F3;
  --paper-raised:#FFFFFF;
  --ink:#12242B;
  --ink-soft:#3E5058;
  --teal:#0E6E5C;
  --teal-dark:#0A5347;
  --amber:#C97A1E;
  --amber-dark:#A6650F;
  --line:#D8DED9;
  --line-strong:#B9C3BC;
  --danger:#B23A2E;

  --font-display:'Fraunces', Georgia, serif;
  --font-body:'Inter', -apple-system, sans-serif;
  --font-mono:'IBM Plex Mono', monospace;

  --radius:2px;
  --max:1180px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:600;
  color:var(--ink);
  line-height:1.15;
  margin:0 0 .5em;
}
p{margin:0 0 1em;color:var(--ink-soft);}
a{color:var(--teal-dark);text-decoration:none;}
a:hover{text-decoration:underline;}
img{max-width:100%;display:block;}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px;}
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--teal-dark);
}
:focus-visible{outline:3px solid var(--amber);outline-offset:2px;}

/* ---- Top document meta bar (signature element) ---- */
.doc-bar{
  background:var(--ink);
  color:#CBD6D2;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.02em;
}
.doc-bar .wrap{
  display:flex;
  flex-wrap:wrap;
  gap:4px 28px;
  padding:7px 24px;
}
.doc-bar span b{color:#fff;font-weight:500;}

/* ---- Header / Nav ---- */
header.site{
  background:var(--paper-raised);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:50;
}
header.site .wrap{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 24px;
}
.logo{
  font-family:var(--font-display);
  font-size:22px;font-weight:600;color:var(--ink);
  display:flex;align-items:baseline;gap:8px;
}
.logo span{
  font-family:var(--font-mono);
  font-size:11px;color:var(--teal);
  border:1px solid var(--teal);
  padding:2px 6px;border-radius:var(--radius);
  letter-spacing:.05em;
}
nav.main{display:flex;align-items:center;gap:28px;}
nav.main a{
  color:var(--ink-soft);font-size:14.5px;font-weight:500;
}
nav.main a:hover{color:var(--teal-dark);text-decoration:none;}
.btn{
  display:inline-block;
  font-family:var(--font-body);
  font-weight:600;
  font-size:14.5px;
  padding:11px 22px;
  border-radius:var(--radius);
  border:1px solid transparent;
  cursor:pointer;
}
.btn:hover{text-decoration:none;}
.btn-amber{background:var(--amber);color:#fff;}
.btn-amber:hover{background:var(--amber-dark);}
.btn-outline{border-color:var(--ink);color:var(--ink);background:transparent;}
.btn-outline:hover{background:var(--ink);color:#fff;}
.menu-toggle{display:none;background:none;border:0;font-size:26px;color:var(--ink);cursor:pointer;}

/* ---- Hero ---- */
.hero{padding:64px 0 56px;border-bottom:1px solid var(--line);}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;}
.hero h1{font-size:44px;max-width:12.5ch;}
.hero .lead{font-size:18px;max-width:52ch;}
.hero-actions{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap;}

/* Document-card visual: mimics an actual SOP form header */
.sop-card{
  background:var(--paper-raised);
  border:1px solid var(--line-strong);
  box-shadow:6px 6px 0 var(--teal);
}
.sop-card .sop-head{
  border-bottom:1px solid var(--line);
  padding:14px 20px;
  display:flex;justify-content:space-between;align-items:center;
  font-family:var(--font-mono);font-size:11px;color:var(--ink-soft);
}
.sop-card .sop-title{
  padding:22px 20px 8px;
  font-family:var(--font-display);
  font-size:20px;color:var(--ink);
}
.sop-card .sop-body{padding:0 20px 22px;}
.sop-card .sop-row{
  display:flex;justify-content:space-between;
  font-size:13px;padding:7px 0;border-top:1px dashed var(--line);
}
.sop-card .sop-row b{color:var(--ink);font-weight:600;}
.sop-tag{
  font-family:var(--font-mono);font-size:10.5px;
  background:var(--teal);color:#fff;padding:3px 8px;border-radius:2px;
}

/* ---- Sections ---- */
section{padding:64px 0;}
section.tight{padding:48px 0;}
.section-head{max-width:640px;margin:0 0 40px;}
.section-head h2{font-size:32px;}
.alt{background:var(--paper-raised);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}

/* ---- Problem grid ---- */
.problem-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);}
.problem-item{background:var(--paper-raised);padding:26px 22px;}
.problem-item .num{font-family:var(--font-mono);color:var(--danger);font-size:12px;}
.problem-item h4{font-size:16px;margin-top:8px;}
.problem-item p{font-size:14px;margin:0;}

/* ---- Solution ---- */
.solution{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.solution ul{list-style:none;padding:0;margin:20px 0;}
.solution li{
  padding:12px 0 12px 28px;border-top:1px solid var(--line);
  position:relative;font-size:15px;color:var(--ink-soft);
}
.solution li::before{
  content:'✓';position:absolute;left:0;color:var(--teal);font-weight:700;
}

/* ---- Audience cards ---- */
.audience-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.audience-card{
  background:var(--paper-raised);border:1px solid var(--line);
  padding:28px 24px;transition:border-color .15s;
}
.audience-card:hover{border-color:var(--teal);}
.audience-card .tag{font-family:var(--font-mono);font-size:11px;color:var(--teal-dark);}
.audience-card h3{font-size:19px;margin:10px 0 8px;}
.audience-card p{font-size:14.5px;margin-bottom:0;}

/* ---- Article cards ---- */
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.article-card{background:var(--paper-raised);border:1px solid var(--line);display:flex;flex-direction:column;}
.article-card .thumb{
  height:130px;background:linear-gradient(135deg,var(--teal) 0%,var(--teal-dark) 100%);
  display:flex;align-items:flex-end;padding:14px;
}
.article-card .thumb span{font-family:var(--font-mono);color:#CDEAE1;font-size:11px;}
.article-card .body{padding:20px;display:flex;flex-direction:column;flex:1;}
.article-card .cat{font-family:var(--font-mono);font-size:10.5px;color:var(--amber-dark);text-transform:uppercase;letter-spacing:.05em;}
.article-card h3{font-size:17px;margin:8px 0 10px;}
.article-card p{font-size:14px;flex:1;}
.article-card .meta{font-size:12px;color:var(--ink-soft);font-family:var(--font-mono);margin-top:12px;}

/* ---- Sample SOP docs ---- */
.doc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.doc-item{
  background:var(--paper-raised);border:1px solid var(--line);
  padding:20px 18px;
}
.doc-item .code{font-family:var(--font-mono);font-size:11px;color:var(--teal-dark);}
.doc-item h4{font-size:15.5px;margin:8px 0 12px;}
.doc-item a{font-size:13.5px;font-weight:600;}

/* ---- CTA banner ---- */
.cta-banner{
  background:var(--ink);color:#EDEFEA;
  padding:56px 0;text-align:center;
}
.cta-banner h2{color:#fff;font-size:30px;}
.cta-banner p{color:#B7C2BD;max-width:50ch;margin:0 auto 26px;}

/* ---- FAQ ---- */
.faq-item{border-top:1px solid var(--line);padding:20px 0;}
.faq-item:last-child{border-bottom:1px solid var(--line);}
.faq-item summary{cursor:pointer;font-weight:600;font-size:16px;list-style:none;position:relative;padding-right:24px;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:'+';position:absolute;right:0;top:0;font-family:var(--font-mono);color:var(--teal);}
.faq-item[open] summary::after{content:'–';}
.faq-item p{margin-top:12px;font-size:14.5px;}

/* ---- Footer ---- */
footer.site{background:var(--ink);color:#9FB0AA;padding:48px 0 24px;font-size:13.5px;}
footer.site .foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;padding-bottom:32px;border-bottom:1px solid #24373D;}
footer.site h5{color:#fff;font-family:var(--font-body);font-size:13px;letter-spacing:.04em;text-transform:uppercase;margin-bottom:14px;}
footer.site a{color:#9FB0AA;}
footer.site a:hover{color:#fff;}
footer.site ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px;}
.foot-bottom{padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;}

/* ---- Blog list / article page shared ---- */
.blog-header{padding:48px 0 32px;border-bottom:1px solid var(--line);}
.blog-filter{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px;}
.blog-filter a{
  font-family:var(--font-mono);font-size:12px;
  border:1px solid var(--line-strong);padding:6px 12px;color:var(--ink-soft);
}
.blog-filter a.active,.blog-filter a:hover{background:var(--teal);border-color:var(--teal);color:#fff;text-decoration:none;}

.article-page{max-width:760px;margin:0 auto;padding:48px 24px 80px;}
.article-page .doc-meta{
  font-family:var(--font-mono);font-size:12px;color:var(--ink-soft);
  border:1px solid var(--line);padding:14px 18px;margin-bottom:32px;
  display:grid;grid-template-columns:1fr 1fr;gap:6px 20px;
}
.article-page h1{font-size:36px;}
.article-page .lead{font-size:17.5px;}
.article-page h2{font-size:24px;margin-top:1.6em;}
.article-page h3{font-size:19px;margin-top:1.4em;}
.article-page ul,.article-page ol{color:var(--ink-soft);padding-left:22px;}
.article-page li{margin-bottom:.4em;}
.article-page blockquote{
  border-left:3px solid var(--teal);margin:24px 0;padding:4px 20px;
  font-style:italic;color:var(--ink-soft);
}
.inline-cta{
  background:var(--paper-raised);border:1px solid var(--teal);
  padding:22px;margin:32px 0;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;
}
.inline-cta p{margin:0;font-size:14.5px;color:var(--ink);font-weight:500;}

/* ---- Responsive ---- */
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;}
  .hero h1{font-size:34px;}
  .problem-grid{grid-template-columns:repeat(2,1fr);}
  .solution{grid-template-columns:1fr;}
  .audience-grid{grid-template-columns:1fr;}
  .article-grid{grid-template-columns:1fr;}
  .doc-grid{grid-template-columns:repeat(2,1fr);}
  footer.site .foot-grid{grid-template-columns:1fr 1fr;}
  nav.main{display:none;}
  .menu-toggle{display:block;}
  .doc-bar .wrap{display:none;}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{transition:none!important;}
}