/* ============================================================
   Control System Integrators — technical / minimal
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Archivo:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --paper:#ffffff;
  --bg:#f5f6f7;
  --ink:#13171b;
  --ink-2:#2c343b;
  --muted:#5c666e;
  --faint:#98a2a9;
  --line:#e3e7ea;
  --line-2:#eef1f2;
  --accent:#1f4de0;
  --accent-ink:#1336a8;
  --amber:#e8920c;
  --maxw:1160px;
  --gut:clamp(1.2rem,4vw,2.6rem);
}

* { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
body {
  font-family:'Archivo',sans-serif;
  color:var(--ink); background:var(--bg);
  line-height:1.6; -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

h1,h2,h3,h4 { font-family:'Archivo',sans-serif; font-weight:600; line-height:1.08; letter-spacing:-.02em; color:var(--ink); }
p { color:var(--muted); }
a { color:var(--accent-ink); text-decoration:none; }
strong { color:var(--ink); font-weight:600; }

.mono { font-family:'JetBrains Mono',monospace; }
.kick {
  font-family:'JetBrains Mono',monospace; font-size:.72rem; font-weight:500;
  letter-spacing:.18em; text-transform:uppercase; color:var(--accent);
  display:inline-flex; align-items:center; gap:.6rem;
}
.kick::before { content:""; width:22px; height:1px; background:var(--accent); }
.kick.muted { color:var(--faint); } .kick.muted::before { background:var(--faint); }

.wrap { width:100%; max-width:var(--maxw); margin-inline:auto; padding-inline:var(--gut); }
.rule { height:1px; background:var(--line); border:0; }

/* ---------- header ---------- */
.hdr { position:sticky; top:0; z-index:50; background:rgba(245,246,247,.85); backdrop-filter:blur(10px); border-bottom:1px solid var(--line); }
.nav { display:flex; align-items:center; justify-content:space-between; height:66px; }
.brand { display:flex; align-items:center; gap:.6rem; color:var(--ink); }
.brand .mono-mark { font-family:'JetBrains Mono',monospace; font-weight:600; font-size:.95rem; letter-spacing:.04em; background:var(--ink); color:#fff; padding:.34rem .5rem; border-radius:5px; }
.brand b { font-weight:600; font-size:1rem; letter-spacing:-.01em; }
.brand b span { color:var(--faint); font-weight:500; }
.nav-links { display:flex; align-items:center; gap:.1rem; }
.nav-links a { color:var(--muted); font-size:.9rem; font-weight:500; padding:.5rem .8rem; border-radius:6px; transition:color .2s,background .2s; }
.nav-links a:hover { color:var(--ink); background:var(--line-2); }
.nav-links a.active { color:var(--accent-ink); }
.nav-quote { margin-left:.5rem; background:var(--accent) !important; color:#fff !important; font-family:'JetBrains Mono',monospace; font-size:.78rem !important; letter-spacing:.04em; text-transform:uppercase; }
.nav-quote:hover { background:var(--accent-ink) !important; }
.menu-btn { display:none; background:none; border:1px solid var(--line); width:42px; height:42px; border-radius:8px; cursor:pointer; font-size:1.1rem; color:var(--ink); }

/* ---------- buttons ---------- */
.btn { display:inline-flex; align-items:center; gap:.5rem; font-family:'JetBrains Mono',monospace; font-size:.82rem; font-weight:500; letter-spacing:.03em; text-transform:uppercase; padding:.8rem 1.3rem; border-radius:7px; cursor:pointer; transition:transform .2s,background .2s,border-color .2s; }
.btn-primary { background:var(--accent); color:#fff; }
.btn-primary:hover { background:var(--accent-ink); transform:translateY(-1px); }
.btn-ghost { background:transparent; color:var(--ink); border:1px solid var(--line); }
.btn-ghost:hover { border-color:var(--ink); }
.arrow::after { content:"→"; }

/* ---------- hero ---------- */
.hero { padding:clamp(3rem,7vw,6rem) 0 clamp(2.5rem,5vw,4rem); position:relative; }
.hero-grid { display:grid; grid-template-columns:1.5fr 1fr; gap:clamp(2rem,5vw,4rem); align-items:end; }
.hero h1 { font-size:clamp(2.4rem,5.5vw,4.1rem); font-weight:700; margin:1.3rem 0 0; letter-spacing:-.03em; }
.hero h1 em { font-style:normal; color:var(--accent); }
.hero .lede { font-size:clamp(1.05rem,1.5vw,1.22rem); color:var(--ink-2); max-width:44ch; margin-top:1.4rem; }
.hero-actions { display:flex; flex-wrap:wrap; gap:.8rem; margin-top:2rem; }
/* spec panel */
.specs { border:1px solid var(--line); border-radius:12px; background:var(--paper); overflow:hidden; }
.spec { display:flex; justify-content:space-between; align-items:baseline; gap:1rem; padding:.95rem 1.2rem; border-bottom:1px solid var(--line-2); }
.spec:last-child { border-bottom:0; }
.spec .k { font-family:'JetBrains Mono',monospace; font-size:.68rem; letter-spacing:.1em; text-transform:uppercase; color:var(--faint); }
.spec .v { font-family:'Archivo',sans-serif; font-weight:600; font-size:.98rem; color:var(--ink); text-align:right; }

/* faint grid backdrop on hero */
.gridbg { position:absolute; inset:0; z-index:-1; pointer-events:none;
  background-image:linear-gradient(var(--line-2) 1px,transparent 1px),linear-gradient(90deg,var(--line-2) 1px,transparent 1px);
  background-size:48px 48px; mask-image:radial-gradient(120% 90% at 70% 0%,#000,transparent 75%); opacity:.7; }

/* ---------- sections ---------- */
section { padding:clamp(3rem,6vw,5rem) 0; }
.shead { display:flex; align-items:flex-end; justify-content:space-between; gap:2rem; margin-bottom:2.4rem; flex-wrap:wrap; }
.shead h2 { font-size:clamp(1.7rem,3.5vw,2.5rem); font-weight:600; letter-spacing:-.02em; margin-top:.7rem; }
.shead p { max-width:48ch; }

/* services grid */
.svc-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); border-top:1px solid var(--line); border-left:1px solid var(--line); }
.svc { border-right:1px solid var(--line); border-bottom:1px solid var(--line); padding:1.6rem 1.5rem; background:var(--paper); transition:background .2s; position:relative; }
.svc:hover { background:#fbfcfd; }
.svc .idx { font-family:'JetBrains Mono',monospace; font-size:.7rem; color:var(--accent); letter-spacing:.08em; }
.svc h3 { font-size:1.12rem; font-weight:600; margin:.7rem 0 .5rem; }
.svc ul { list-style:none; display:grid; gap:.3rem; }
.svc li { font-size:.88rem; color:var(--muted); padding-left:1rem; position:relative; }
.svc li::before { content:""; position:absolute; left:0; top:.62em; width:5px; height:1px; background:var(--faint); }

/* platforms strip */
.platforms { border:1px solid var(--line); border-radius:12px; background:var(--paper); padding:1.6rem 1.8rem; }
.platforms .lbl { font-family:'JetBrains Mono',monospace; font-size:.68rem; letter-spacing:.14em; text-transform:uppercase; color:var(--faint); margin-bottom:1rem; }
.platforms .row { display:flex; flex-wrap:wrap; gap:.6rem 1.5rem; }
.platforms .row span { font-family:'JetBrains Mono',monospace; font-size:.86rem; color:var(--ink-2); }
.platforms .row span::before { content:"·"; color:var(--accent); margin-right:.5rem; }

/* feature split (solar) */
.feature { display:grid; grid-template-columns:1fr 1fr; gap:clamp(2rem,5vw,4rem); align-items:center; }
.feature .panel { border:1px solid var(--line); border-radius:12px; background:var(--paper); padding:1.8rem; }
.feature .panel.accent { background:linear-gradient(160deg,#fff,#f4f7ff); border-color:#d7e0fb; }
.mini-list { list-style:none; display:grid; gap:.8rem; margin-top:1.2rem; }
.mini-list li { display:flex; gap:.7rem; font-size:.95rem; color:var(--muted); }
.mini-list li::before { content:"→"; color:var(--accent); }
.mini-list b { color:var(--ink); font-weight:600; }

/* prose */
.prose { max-width:68ch; }
.prose h2 { font-size:1.5rem; margin:2.2rem 0 .7rem; }
.prose h2:first-child { margin-top:0; }
.prose h3 { font-size:1.15rem; margin:1.6rem 0 .5rem; }
.prose p { margin-bottom:1rem; font-size:1.02rem; }
.prose ul,.prose ol { margin:0 0 1.2rem 1.1rem; }
.prose li { color:var(--muted); margin-bottom:.4rem; }
.prose table { width:100%; border-collapse:collapse; margin:1.2rem 0; font-size:.92rem; }
.prose th,.prose td { border:1px solid var(--line); padding:.7rem .85rem; text-align:left; vertical-align:top; }
.prose th { background:var(--line-2); font-family:'JetBrains Mono',monospace; font-size:.72rem; letter-spacing:.06em; text-transform:uppercase; color:var(--ink-2); font-weight:500; }
.prose hr { border:0; border-top:1px solid var(--line); margin:2rem 0; }

/* contact / form */
.form-grid { display:grid; grid-template-columns:1.2fr .8fr; gap:clamp(2rem,5vw,3.5rem); align-items:start; }
form.quote { display:grid; gap:1rem; }
.field { display:grid; gap:.4rem; }
.field.row2 { grid-template-columns:1fr 1fr; gap:1rem; }
label { font-family:'JetBrains Mono',monospace; font-size:.7rem; letter-spacing:.08em; text-transform:uppercase; color:var(--muted); }
input,textarea { font-family:'Archivo',sans-serif; font-size:1rem; color:var(--ink); background:var(--paper); border:1px solid var(--line); border-radius:8px; padding:.75rem .9rem; width:100%; transition:border-color .2s,box-shadow .2s; }
input:focus,textarea:focus { outline:0; border-color:var(--accent); box-shadow:0 0 0 3px rgba(31,77,224,.12); }
textarea { min-height:120px; resize:vertical; }
.form-note { font-size:.85rem; color:var(--faint); }
.contact-card { border:1px solid var(--line); border-radius:12px; background:var(--paper); padding:1.6rem; }
.contact-card h4 { font-family:'JetBrains Mono',monospace; font-size:.72rem; letter-spacing:.1em; text-transform:uppercase; color:var(--faint); font-weight:500; margin-bottom:.8rem; }
.contact-card a, .contact-card p { display:block; color:var(--ink-2); font-size:.95rem; margin-bottom:.45rem; }
.contact-card a:hover { color:var(--accent-ink); }
.form-status { font-family:'JetBrains Mono',monospace; font-size:.85rem; padding:.7rem .9rem; border-radius:8px; display:none; }
.form-status.ok { display:block; background:#eef6ee; color:#1f7a34; border:1px solid #cce6cf; }
.form-status.err { display:block; background:#fdeeee; color:#b3322c; border:1px solid #f0cfcd; }

/* blog */
.post-list { border-top:1px solid var(--line); }
.post-row { display:grid; grid-template-columns:140px 1fr auto; gap:1.5rem; align-items:baseline; padding:1.6rem 0; border-bottom:1px solid var(--line); transition:padding-left .2s; }
.post-row:hover { padding-left:.6rem; }
.post-row .date { font-family:'JetBrains Mono',monospace; font-size:.78rem; color:var(--faint); }
.post-row h3 { font-size:1.3rem; font-weight:600; }
.post-row h3 a { color:var(--ink); }
.post-row h3 a:hover { color:var(--accent-ink); }
.post-row .go { font-family:'JetBrains Mono',monospace; font-size:.8rem; color:var(--accent); }
.post-meta { font-family:'JetBrains Mono',monospace; font-size:.78rem; color:var(--faint); margin-bottom:.6rem; }

/* CTA band */
.cta { background:var(--ink); color:#fff; }
.cta .wrap { padding:clamp(2.4rem,5vw,3.6rem) var(--gut); display:flex; align-items:center; justify-content:space-between; gap:2rem; flex-wrap:wrap; }
.cta h2 { color:#fff; font-size:clamp(1.6rem,3.2vw,2.3rem); }
.cta .kick { color:#7fa0ff; } .cta .kick::before { background:#7fa0ff; }
.cta .btn-primary { background:#fff; color:var(--ink); }

/* footer */
.ftr { background:var(--paper); border-top:1px solid var(--line); padding:3rem 0 2rem; }
.ftr-grid { display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:2rem; }
.ftr h4 { font-family:'JetBrains Mono',monospace; font-size:.7rem; letter-spacing:.12em; text-transform:uppercase; color:var(--faint); font-weight:500; margin-bottom:.9rem; }
.ftr a,.ftr p { display:block; color:var(--muted); font-size:.9rem; margin-bottom:.45rem; }
.ftr a:hover { color:var(--accent-ink); }
.ftr-bottom { display:flex; justify-content:space-between; flex-wrap:wrap; gap:1rem; margin-top:2.4rem; padding-top:1.4rem; border-top:1px solid var(--line); font-family:'JetBrains Mono',monospace; font-size:.72rem; color:var(--faint); }

/* reveal */
.reveal { opacity:0; transform:translateY(16px); transition:opacity .6s cubic-bezier(.2,.6,.3,1),transform .6s cubic-bezier(.2,.6,.3,1); }
.reveal.in { opacity:1; transform:none; }

/* responsive */
@media (max-width:860px){
  .hero-grid,.feature,.form-grid{ grid-template-columns:1fr; }
  .ftr-grid{ grid-template-columns:1fr 1fr; }
  .post-row{ grid-template-columns:1fr; gap:.4rem; }
  .nav-links{ position:fixed; inset:66px 0 auto 0; flex-direction:column; align-items:stretch; background:var(--paper); border-bottom:1px solid var(--line); padding:.8rem; gap:.15rem; transform:translateY(-130%); transition:transform .3s; }
  .nav-links.open{ transform:none; }
  .nav-links a{ padding:.85rem; }
  .nav-quote{ margin-left:0; text-align:center; }
  .menu-btn{ display:block; }
}
@media (max-width:520px){ .ftr-grid{ grid-template-columns:1fr; } .field.row2{ grid-template-columns:1fr; } }
@media (prefers-reduced-motion:reduce){ .reveal{ opacity:1; transform:none; transition:none; } }