```css
:root{
  --paper:#F6F4EE;
  --ink:#15161B;
  --red:#E14B2A;
  --blue:#1B54C4;
  --yellow:#F2BE19;
  --grey:#8C8E92;
  --line: rgba(21,22,27,0.14);
}

*{ box-sizing:border-box; }

html,body{
  margin:0;
  padding:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'IBM Plex Sans', sans-serif;
  overflow-x:hidden;
}

body{
  min-height:100vh;
  display:flex;
  flex-direction:column;
  position:relative;
}

a{ color:inherit; }

.grid-bg{
  position:fixed;
  inset:0;
  z-index:0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size:64px 64px;
  pointer-events:none;
}

.grid-bg::after{
  content:"";
  position:absolute;
  inset:0;
  background:radial-gradient(
    ellipse at 15% 10%,
    rgba(246,244,238,0) 0%,
    var(--paper) 78%
  );
}

.block{
  position:fixed;
  z-index:0;
}

.block--red{
  width:64px;
  height:128px;
  background:var(--red);
  top:64px;
  right:128px;
}

.block--blue{
  width:128px;
  height:64px;
  background:var(--blue);
  bottom:0;
  left:64px;
}

.block--yellow{
  width:64px;
  height:64px;
  background:var(--yellow);
  bottom:192px;
  right:0;
  animation:pulse 5s ease-in-out infinite;
  transform-origin:center;
}

@keyframes pulse{
  0%,100%{ transform:scale(1); }
  50%{ transform:scale(1.35); }
}

@media (prefers-reduced-motion:reduce){
  .block--yellow{ animation:none; }
}

header,main,footer{
  position:relative;
  z-index:1;
}

/* ---- header / nav ---- */

header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:40px 64px 0;
  gap:24px;
  flex-wrap:wrap;
}

.mark{
  font-family:'IBM Plex Mono',monospace;
  font-size:13px;
  letter-spacing:0.06em;
  color:var(--grey);
  text-decoration:none;
}

.mark strong{
  color:var(--ink);
  font-weight:500;
}

nav.site-nav{
  display:flex;
  gap:28px;
}

nav.site-nav a{
  font-family:'IBM Plex Mono',monospace;
  font-size:13px;
  letter-spacing:0.06em;
  text-decoration:none;
  color:var(--grey);
  padding-bottom:4px;
  border-bottom:1px solid transparent;
}

nav.site-nav a:hover{
  color:var(--ink);
}

nav.site-nav a[aria-current="page"]{
  color:var(--ink);
  border-bottom-color:var(--red);
}

nav.site-nav a:focus-visible,
.contact a:focus-visible,
a:focus-visible{
  outline:2px solid var(--blue);
  outline-offset:3px;
}

/* ---- main content ---- */

main{
  flex:1;
  padding:48px 64px 80px;
  max-width:980px;
}

.hero{
  margin-bottom:48px;
}

.eyebrow{
  font-family:'IBM Plex Mono',monospace;
  font-size:13px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--red);
  margin:0 0 20px;
}

h1{
  font-family:'Space Grotesk',sans-serif;
  font-weight:700;
  font-size:clamp(40px,7vw,84px);
  line-height:0.98;
  letter-spacing:-0.02em;
  margin:0 0 28px;
}

h1 .last{
  color:var(--blue);
}

h2{
  font-family:'Space Grotesk',sans-serif;
  font-weight:600;
  letter-spacing:-0.02em;
}

h3{
  font-family:'Space Grotesk',sans-serif;
}

.lede{
  font-size:clamp(17px,2vw,20px);
  line-height:1.6;
  color:#3A3B41;
  max-width:640px;
  margin:0 0 40px;
}

.lede strong{
  color:var(--ink);
  font-weight:500;
}

.body-text{
  font-size:16px;
  line-height:1.7;
  color:#3A3B41;
  max-width:600px;
}

.body-text p{
  margin:0 0 20px;
}

.placeholder{
  border:1px dashed var(--line);
  border-radius:4px;
  padding:2px 8px;
  color:var(--grey);
  font-style:italic;
}

/* ---- main page navigation ---- */

.pages{
  display:grid;
  grid-template-columns:repeat(4,minmax(120px,1fr));
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  max-width:680px;
  margin-top:8px;
}

.page-item{
  background:var(--paper);
  padding:18px 16px;
  display:flex;
  flex-direction:column;
  gap:10px;
  min-height:110px;
  justify-content:space-between;
  text-decoration:none;
  color:inherit;
  transition:
    background 0.15s ease,
    transform 0.15s ease;
}

.page-item:hover{
  background:#EFEDE5;
  transform:translateY(-2px);
}

.page-item .num{
  font-family:'IBM Plex Mono',monospace;
  font-size:11px;
  color:var(--grey);
}

.page-item .name{
  font-family:'Space Grotesk',sans-serif;
  font-weight:600;
  font-size:16px;
  color:var(--ink);
}

.page-item .teaser{
  font-size:12px;
  color:var(--grey);
  line-height:1.4;
}

/* ---- knowledge section ---- */

.knowledge{
  margin-top:100px;
  max-width:760px;
}

.knowledge > .eyebrow{
  margin-bottom:14px;
}

.knowledge > h2{
  font-size:clamp(28px,4vw,46px);
  line-height:1.05;
  max-width:700px;
  margin:0 0 18px;
}

.section-intro{
  font-size:17px;
  line-height:1.65;
  color:#3A3B41;
  max-width:620px;
  margin:0 0 42px;
}

/* Individual knowledge categories */

.knowledge-category{
  border-top:1px solid var(--line);
  padding:30px 0;
}

.knowledge-category:last-child{
  border-bottom:1px solid var(--line);
}

.knowledge-category__header{
  display:grid;
  grid-template-columns:60px 1fr;
  gap:18px;
  align-items:start;
}

.knowledge-category__header > .num{
  font-family:'IBM Plex Mono',monospace;
  font-size:11px;
  color:var(--grey);
  padding-top:7px;
}

.knowledge-category h3{
  font-size:27px;
  line-height:1.1;
  margin:0 0 10px;
  font-weight:600;
}

.knowledge-category p{
  font-size:15px;
  line-height:1.65;
  color:#3A3B41;
  max-width:600px;
  margin:0;
}

/* Knowledge links */

.knowledge-link{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:24px;
  text-decoration:none;
  border-bottom:1px solid var(--line);
  padding:18px 0;
  margin-left:78px;
  font-family:'Space Grotesk',sans-serif;
  font-weight:600;
  transition:
    color 0.15s ease,
    padding-left 0.15s ease;
}

.knowledge-link:hover{
  color:var(--blue);
  padding-left:6px;
}

.knowledge-link > span:last-child{
  font-family:'IBM Plex Mono',monospace;
  font-size:18px;
  flex-shrink:0;
}

.knowledge-link strong{
  display:block;
  font-weight:600;
}

.knowledge-link small{
  display:block;
  font-family:'IBM Plex Mono',monospace;
  font-size:11px;
  font-weight:400;
  color:var(--grey);
  margin-top:6px;
  letter-spacing:0.03em;
}

.knowledge-articles{
  margin-top:18px;
}

/* ---- accessibility ---- */

.visually-hidden{
  position:absolute;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  white-space:nowrap;
  border:0;
}

/* ---- empty state ---- */

.empty-state{
  border:1px dashed var(--line);
  border-radius:6px;
  padding:40px 32px;
  max-width:600px;
  margin-top:8px;
}

.empty-state .title{
  font-family:'Space Grotesk',sans-serif;
  font-weight:600;
  font-size:18px;
  margin:0 0 8px;
}

.empty-state p{
  font-size:14px;
  color:var(--grey);
  margin:0;
  line-height:1.6;
}

/* ---- work grid ---- */

.work-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:16px;
  max-width:680px;
  margin-top:8px;
}

.work-card{
  border:1px dashed var(--line);
  border-radius:6px;
  min-height:140px;
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--grey);
  font-family:'IBM Plex Mono',monospace;
  font-size:12px;
  text-align:center;
  padding:16px;
}

/* ---- contact ---- */

.contact-block{
  display:flex;
  flex-direction:column;
  gap:16px;
  max-width:480px;
  margin-top:8px;
}

.contact-row{
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  border-bottom:1px solid var(--line);
  padding-bottom:14px;
  gap:16px;
}

.contact-row .label{
  font-family:'IBM Plex Mono',monospace;
  font-size:12px;
  color:var(--grey);
  text-transform:uppercase;
  letter-spacing:0.06em;
}

.contact-row a{
  font-family:'Space Grotesk',sans-serif;
  font-weight:600;
  font-size:17px;
  text-decoration:none;
  color:var(--ink);
  border-bottom:1px solid var(--ink);
}

.contact-row a:hover{
  color:var(--blue);
  border-color:var(--blue);
}

/* ---- footer ---- */

footer{
  padding:32px 64px 40px;
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap:24px;
  flex-wrap:wrap;
}

.contact{
  font-family:'IBM Plex Mono',monospace;
  font-size:13px;
  color:var(--ink);
}

.contact a{
  color:var(--ink);
  text-decoration:none;
  border-bottom:1px solid var(--ink);
  padding-bottom:1px;
}

.contact a:hover{
  color:var(--blue);
  border-color:var(--blue);
}

.copy{
  font-family:'IBM Plex Mono',monospace;
  font-size:12px;
  color:var(--grey);
  text-align:right;
}

/* ---- blog / knowledge index ---- */

.blog-list{
  display:flex;
  flex-direction:column;
  max-width:680px;
  margin-top:8px;
  border-top:1px solid var(--line);
}

.blog-card{
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  gap:24px;
  padding:22px 0;
  border-bottom:1px solid var(--line);
  text-decoration:none;
  color:inherit;
}

.blog-card:hover .blog-card-title{
  color:var(--blue);
}

.blog-card-left{
  display:flex;
  flex-direction:column;
  gap:6px;
}

.blog-card-title{
  font-family:'Space Grotesk',sans-serif;
  font-weight:600;
  font-size:19px;
  transition:color 0.15s ease;
}

.blog-card-excerpt{
  font-size:14px;
  color:var(--grey);
  max-width:480px;
  line-height:1.5;
}

.blog-card-date{
  font-family:'IBM Plex Mono',monospace;
  font-size:12px;
  color:var(--grey);
  white-space:nowrap;
}

.more-soon{
  font-family:'IBM Plex Mono',monospace;
  font-size:13px;
  color:var(--grey);
  padding:18px 0 0;
}

/* ---- article page ---- */

.article-meta{
  font-family:'IBM Plex Mono',monospace;
  font-size:12px;
  color:var(--grey);
  margin:-12px 0 32px;
}

.back-link{
  display:inline-block;
  font-family:'IBM Plex Mono',monospace;
  font-size:13px;
  color:var(--grey);
  text-decoration:none;
  margin-bottom:24px;
}

.back-link:hover{
  color:var(--ink);
}

.article-body h2{
  font-family:'Space Grotesk',sans-serif;
  font-weight:600;
  font-size:24px;
  margin:40px 0 16px;
  letter-spacing:-0.01em;
}

.article-body h2:first-child{
  margin-top:0;
}

.article-body ul,
.article-body ol{
  margin:0 0 20px;
  padding-left:22px;
  line-height:1.7;
  color:#3A3B41;
}

.article-body li{
  margin-bottom:8px;
}

.article-body strong{
  color:var(--ink);
  font-weight:500;
}

.callout{
  border-left:3px solid var(--red);
  background:#EFEDE5;
  padding:14px 20px;
  margin:0 0 28px;
  font-size:15px;
  line-height:1.6;
  color:#3A3B41;
  max-width:600px;
}

.callout strong{
  color:var(--ink);
}

/* ---- responsive ---- */

@media (max-width:720px){

  header,
  main,
  footer{
    padding-left:24px;
    padding-right:24px;
  }

  header{
    padding-top:28px;
  }

  nav.site-nav{
    gap:18px;
    width:100%;
    overflow-x:auto;
    padding-bottom:4px;
  }

  .pages{
    grid-template-columns:repeat(2,minmax(0,1fr));
    max-width:100%;
  }

  .knowledge{
    margin-top:72px;
  }

  .knowledge-category__header{
    grid-template-columns:42px 1fr;
    gap:12px;
  }

  .knowledge-link{
    margin-left:54px;
  }

  .work-grid{
    grid-template-columns:1fr;
  }

  footer{
    flex-direction:column;
    align-items:flex-start;
  }

  .copy{
    text-align:left;
  }

  .block--red{
    width:36px;
    height:72px;
    right:24px;
    top:96px;
  }

  .block--blue{
    width:72px;
    height:36px;
    left:24px;
  }

  .block--yellow{
    width:36px;
    height:36px;
    bottom:120px;
  }
}
```