/* ===== Tokens ===== */
:root{
  --bg: #0E1416;
  --bg-elevated: #131B1E;
  --surface: #182124;
  --surface-2: #1E2A2D;
  --border: #2A3639;
  --border-soft: #202B2E;

  --text-primary: #ECF2F0;
  --text-secondary: #9BB0AB;
  --text-muted: #5C726D;

  --accent: #E8A33D;
  --accent-soft: rgba(232,163,61,0.12);
  --flow: #4FA8A0;
  --flow-dim: #2E5C56;

  --font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  --rail-w: 88px;
  --content-max: 760px;
  --radius: 4px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body{
  margin:0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.skip-link{
  position:absolute; left:-9999px; top:0;
  background: var(--accent); color:#151007; padding: 10px 16px;
  z-index: 200; font-family: var(--font-mono); font-size: 13px;
}
.skip-link:focus{ left: 10px; top: 10px; }

a{ color: inherit; }
h1,h2,h3,h4{ font-family: var(--font-display); margin:0; font-weight:600; letter-spacing: -0.01em; }
p{ margin: 0 0 1em 0; color: var(--text-secondary); }
p:last-child{ margin-bottom:0; }

:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ===== Layout shell ===== */
main{
  margin-left: var(--rail-w);
  padding: 0 6vw;
}
.section{
  max-width: var(--content-max);
  padding: 110px 0;
  border-bottom: 1px solid var(--border-soft);
}
.section:last-of-type{ border-bottom:none; }

.section-kicker{
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--flow);
  margin: 0 0 18px 0;
}
.section-title{
  font-size: clamp(1.6rem, 2.4vw, 2.1rem);
  margin-bottom: 44px;
  max-width: 20ch;
}

/* ===== Rail nav ===== */
.rail{
  position: fixed;
  top:0; left:0; bottom:0;
  width: var(--rail-w);
  background: var(--bg-elevated);
  border-right: 1px solid var(--border-soft);
  display:flex;
  flex-direction: column;
  align-items: center;
  padding: 28px 0;
  z-index: 100;
}
.rail-mark{
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  border: 1px solid var(--border);
  width: 34px; height: 34px;
  display:flex; align-items:center; justify-content:center;
  border-radius: var(--radius);
  margin-bottom: 48px;
}
.rail-offsets{
  list-style:none; margin:0; padding:0;
  display:flex; flex-direction:column; gap: 30px;
  flex:1;
}
.rail-link{
  text-decoration:none;
  display:flex; flex-direction:column; align-items:center;
  gap: 4px;
  color: var(--text-muted);
}
.offset-num{
  font-family: var(--font-mono);
  font-size: 15px;
  width: 30px; height: 30px;
  display:flex; align-items:center; justify-content:center;
  border-radius: 50%;
  border: 1px solid var(--border);
  transition: border-color .15s ease, color .15s ease;
}
.offset-label{
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.02em;
  opacity: 0;
  transform: translateY(-2px);
  transition: opacity .15s ease;
}
.rail-link:hover .offset-label,
.rail-link:focus-visible .offset-label{ opacity: 1; }
.rail-link:hover .offset-num,
.rail-link:focus-visible .offset-num{ border-color: var(--flow); color: var(--flow); }

.rail-link.is-active .offset-num{
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}
.rail-link.is-active .offset-label{ opacity: 1; color: var(--accent); }

.rail-toggle{ display:none; }

/* ===== Hero ===== */
.hero{
  padding-top: 130px;
  border-bottom: 1px solid var(--border-soft);
  max-width: none;
  display:grid;
  grid-template-columns: minmax(0,560px) 1fr;
  gap: 40px;
  align-items: center;
}
.hero-inner{ max-width: 560px; }
.eyebrow-plain{
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 14px;
  margin: 0 0 22px 0;
}
.hero-title{
  font-size: clamp(2.2rem, 4.6vw, 3.4rem);
  line-height: 1.08;
  margin-bottom: 24px;
}
.hero-lead{
  font-size: 1.05rem;
  max-width: 46ch;
  margin-bottom: 34px;
}
.hero-actions{ display:flex; gap: 14px; flex-wrap: wrap; }

.btn{
  display:inline-flex; align-items:center;
  padding: 13px 22px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius);
  text-decoration:none;
  border: 1px solid transparent;
  transition: transform .12s ease, border-color .12s ease, background .12s ease;
}
.btn-primary{
  background: var(--accent);
  color: #16110A;
}
.btn-primary:hover{ transform: translateY(-1px); }
.btn-ghost{
  border-color: var(--border);
  color: var(--text-primary);
}
.btn-ghost:hover{ border-color: var(--flow); color: var(--flow); }

/* hero diagram */
.hero-diagram{ min-width: 0; }
.flow-svg{ width:100%; height:auto; display:block; }
.flow-line{
  stroke: var(--border);
  stroke-width: 1.5;
  fill:none;
  stroke-dasharray: 4 5;
}
.flow-node rect{
  fill: var(--surface);
  stroke: var(--border);
  stroke-width: 1;
}
.flow-node--topic rect{ stroke: var(--flow-dim); }
.flow-node--compute rect{ stroke: var(--accent); fill: var(--surface-2); }
.flow-label{
  font-family: var(--font-mono);
  font-size: 12px;
  fill: var(--text-muted);
}
.flow-label--on{ fill: var(--text-primary); font-size: 13px; }
.flow-label--on-sub{ fill: var(--text-secondary); font-size: 10px; }
.flow-label--mono{ fill: var(--flow); font-size: 12px; }
.pulse{ fill: var(--accent); }
.pulse--a, .pulse--b{ fill: var(--flow); }
.diagram-caption{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
  margin-top: 4px;
}

/* ===== Fokus ===== */
.fokus-grid{
  display:grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 56px;
}
.fokus-facts{ margin:0; }
.fact{
  padding: 16px 0;
  border-top: 1px solid var(--border-soft);
}
.fact:last-child{ border-bottom: 1px solid var(--border-soft); }
.fact dt{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.fact dd{ margin:0; color: var(--text-primary); font-size: 0.95rem; }

/* ===== Stack table ===== */
.stack-table{
  display:flex; flex-direction:column;
  border-top: 1px solid var(--border-soft);
}
.stack-row{
  display:grid;
  grid-template-columns: 160px 220px 1fr;
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-soft);
  font-size: 0.92rem;
  align-items: baseline;
}
.stack-row--head{
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 12px;
  padding-bottom: 12px;
}
.stack-layer{ color: var(--text-secondary); }
.stack-tool{
  font-family: var(--font-mono);
  color: var(--flow);
  font-size: 0.9rem;
}
.stack-row > span:last-child{ color: var(--text-secondary); }

/* ===== Case studies ===== */
.case-study{
  padding: 28px 0;
  border-top: 1px solid var(--border-soft);
}
.case-study:last-child{ border-bottom: 1px solid var(--border-soft); }
.case-head{
  display:flex; justify-content:space-between; align-items:baseline; gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.case-head h3{ font-size: 1.15rem; }
.case-tag{
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--flow);
  white-space: nowrap;
}
.case-points{
  margin: 14px 0 0 0;
  padding-left: 18px;
  color: var(--text-secondary);
}
.case-points li{ margin-bottom: 8px; font-size: 0.92rem; }
.case-link{
  display: inline-flex;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--flow);
  text-decoration: none;
  border-bottom: 1px solid var(--flow-dim);
  padding-bottom: 2px;
  transition: color .15s ease, border-color .15s ease;
}
.case-link:hover{ color: var(--accent); border-color: var(--accent); }
.case-study--placeholder{ opacity: 0.6; }
.case-study--placeholder .case-tag{ color: var(--text-muted); }

/* ===== Services ===== */
.services-grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
  margin-bottom: 64px;
}
.service{
  background: var(--bg);
  padding: 26px;
}
.service h3{ font-size: 1rem; margin-bottom: 10px; }
.service p{ font-size: 0.9rem; margin:0; }

.process{
  list-style:none; margin:0; padding:0;
  display:flex; flex-direction:column;
}
.process li{
  display:grid;
  grid-template-columns: 40px 1fr;
  gap: 20px;
  padding: 20px 0;
  border-top: 1px solid var(--border-soft);
}
.process li:last-child{ border-bottom: 1px solid var(--border-soft); }
.process-num{
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.95rem;
}
.process h4{ font-size: 0.98rem; margin-bottom: 6px; }
.process p{ font-size: 0.9rem; margin:0; }

/* ===== Contact ===== */
.section--contact{ max-width: none; }
.contact-lead{ max-width: 50ch; margin-bottom: 44px; }
.contact-grid{
  display:flex;
  flex-wrap: wrap;
  gap: 14px;
  max-width: var(--content-max);
}
.contact-item{
  flex: 1 1 220px;
  text-decoration:none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display:flex; flex-direction:column; gap: 8px;
  transition: border-color .15s ease, transform .15s ease;
}
.contact-item:hover{ border-color: var(--accent); transform: translateY(-2px); }
.contact-label{
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}
.contact-value{ color: var(--text-primary); font-size: 0.95rem; }

/* ===== Footer ===== */
.footer{
  max-width: var(--content-max);
  padding: 40px 0 90px 0;
  display:flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
}
.footer-legal p{ margin: 0 0 4px 0; color: var(--text-muted); font-family: var(--font-mono); font-size: 12px; }
.footer-copy{ align-self: flex-end; }

/* ===== Responsive ===== */
@media (max-width: 980px){
  .hero{ grid-template-columns: 1fr; }
  .hero-diagram{ order: -1; }
  .fokus-grid{ grid-template-columns: 1fr; gap: 32px; }
  .services-grid{ grid-template-columns: 1fr; }
  .stack-row{ grid-template-columns: 110px 1fr; }
  .stack-row > span:last-child{ grid-column: 1 / -1; }
}

@media (max-width: 720px){
  :root{ --rail-w: 0px; }
  main{ margin-left: 0; padding: 0 6vw; }
  .rail{
    width: 100%;
    height: auto;
    bottom: auto;
    flex-direction: row;
    justify-content: space-between;
    padding: 14px 5vw;
    border-right:none;
    border-bottom: 1px solid var(--border-soft);
  }
  .rail-mark{ margin-bottom:0; }
  .rail-offsets{
    position: fixed;
    top: 0; right: 0;
    height: 100vh;
    width: 200px;
    background: var(--bg-elevated);
    border-left: 1px solid var(--border-soft);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 0 24px;
    gap: 26px;
    transform: translateX(100%);
    transition: transform .2s ease;
  }
  .rail-offsets.is-open{ transform: translateX(0); }
  .rail-link{ flex-direction: row; gap: 12px; }
  .offset-label{ opacity:1; position:static; transform:none; }
  .rail-toggle{
    display:flex; flex-direction:column; justify-content:center; gap:5px;
    width: 34px; height: 34px;
    background:none; border:1px solid var(--border); border-radius: var(--radius);
    cursor:pointer;
  }
  .rail-toggle span{ display:block; width: 16px; height:1px; background: var(--text-secondary); margin:0 auto; }
  .section{ padding: 70px 0; }
  .hero{ padding-top: 90px; }
}