/* ============================================================
   ARCHAEA AI — shared design system
   Concept: archaea are the oldest organisms on earth; they
   thrive in extreme, sealed environments. The visual language
   is geological — strata, cross-sections, deep-sea ink —
   because the product story is layers of one stack living
   inside the customer's perimeter.
   Palette:
     --abyss   #0B171D  deep-sea ink (dark surfaces)
     --stratum #132630  raised dark panel
     --mist    #F3F6F5  cool mineral light background
     --ink     #182A31  text on light
     --vent    #157F76  hydrothermal teal  → Biblio (knowledge)
     --ember   #C2622B  furnace copper     → ArcFact (factory)
   Type: Archivo (display) · IBM Plex Sans (body) · IBM Plex Mono (labels)
   ============================================================ */

:root {
  --abyss: #0B171D;
  --stratum: #132630;
  --stratum-2: #1A313D;
  --mist: #F3F6F5;
  --card: #FFFFFF;
  --ink: #182A31;
  --ink-soft: #47585F;
  --line: #D8E0DD;
  --line-dark: #23404C;
  --vent: #157F76;
  --vent-deep: #0E5F59;
  --vent-tint: #E3F0EE;
  --ember: #C2622B;
  --ember-deep: #9E4D1F;
  --ember-tint: #F8ECE2;
  --gold: #D9B26A;
  --max: 1120px;
  --radius: 10px;
  --font-display: "Archivo", sans-serif;
  --font-body: "IBM Plex Sans", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--mist);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

a { color: var(--vent-deep); text-decoration: none; }
a:hover { text-decoration: underline; }

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

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- typography ---------- */

h1, h2, h3, .display {
  font-family: var(--font-display);
  font-weight: 650;
  letter-spacing: -0.015em;
  line-height: 1.12;
}

h1 { font-size: clamp(2.1rem, 4.6vw, 3.4rem); }
h2 { font-size: clamp(1.55rem, 3vw, 2.2rem); }
h3 { font-size: 1.15rem; line-height: 1.35; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--vent-deep);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 2px;
  background: currentColor;
  flex: none;
}
.eyebrow.ember { color: var(--ember-deep); }
.on-dark .eyebrow { color: var(--gold); }

.lede {
  font-size: clamp(1.02rem, 1.6vw, 1.2rem);
  color: var(--ink-soft);
  max-width: 46em;
}
.on-dark .lede { color: #B9C9CC; }

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 23, 29, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-dark);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 64px;
}
.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.05em;
  color: #F2F6F5;
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand:hover { text-decoration: none; }
.brand .mark { flex: none; }

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav a {
  font-size: 0.92rem;
  font-weight: 500;
  color: #C6D4D6;
  padding: 8px 12px;
  border-radius: 6px;
}
.nav a:hover { color: #fff; background: rgba(255,255,255,0.06); text-decoration: none; }
.nav a[aria-current="page"] { color: #fff; box-shadow: inset 0 -2px 0 var(--gold); border-radius: 6px 6px 0 0; }
.nav .cta {
  background: var(--vent);
  color: #fff;
  margin-left: 8px;
}
.nav .cta:hover { background: var(--vent-deep); }

.menu-toggle { display: none; }

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 22px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--vent); color: #fff; }
.btn-primary:hover { background: var(--vent-deep); }
.btn-ember { background: var(--ember); color: #fff; }
.btn-ember:hover { background: var(--ember-deep); }
.btn-ghost { border-color: var(--line-dark); color: #E3ECEC; }
.btn-ghost:hover { border-color: #4A6873; background: rgba(255,255,255,0.05); }
.btn-ghost-light { border-color: var(--line); color: var(--ink); background: #fff; }
.btn-ghost-light:hover { border-color: var(--ink-soft); }

/* ---------- sections ---------- */

section { padding: 84px 0; }
section.tight { padding: 56px 0; }

.on-dark {
  background: var(--abyss);
  color: #E9F0EF;
}
.on-dark h1, .on-dark h2, .on-dark h3 { color: #F4F8F7; }

.section-head { max-width: 62em; margin-bottom: 44px; }

/* ---------- hero ---------- */

.hero {
  padding: 96px 0 88px;
  position: relative;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.hero .actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.hero .subline {
  margin-top: 26px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #7E969B;
}

/* subtle strata backdrop lines on dark heroes */
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      to bottom,
      transparent 0 120px,
      rgba(217, 178, 106, 0.05) 120px 121px
    );
  pointer-events: none;
}
.hero .wrap { position: relative; z-index: 1; }

/* ---------- cards & grids ---------- */

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
}
.card h3 { margin-bottom: 8px; }
.card p { color: var(--ink-soft); font-size: 0.95rem; }
.card .eyebrow { margin-bottom: 10px; }

.card-dark {
  background: var(--stratum);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 26px;
}
.card-dark h3 { color: #F0F5F4; margin-bottom: 8px; }
.card-dark p { color: #A9BCC0; font-size: 0.95rem; }

/* product accent cards */
.card.accent-vent { border-top: 3px solid var(--vent); }
.card.accent-ember { border-top: 3px solid var(--ember); }

/* ---------- product split (home) ---------- */

.product-split { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.product-panel {
  border-radius: 14px;
  padding: 40px 36px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  border: 1px solid var(--line);
  background: var(--card);
}
.product-panel .tagline {
  font-family: var(--font-display);
  font-weight: 650;
  font-size: 1.5rem;
  letter-spacing: -0.01em;
  line-height: 1.2;
}
.product-panel .pname {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 600;
}
.product-panel.vent .pname { color: var(--vent-deep); }
.product-panel.ember .pname { color: var(--ember-deep); }
.product-panel.vent { box-shadow: inset 4px 0 0 var(--vent); }
.product-panel.ember { box-shadow: inset 4px 0 0 var(--ember); }
.product-panel ul { list-style: none; display: grid; gap: 8px; color: var(--ink-soft); font-size: 0.95rem; }
.product-panel ul li { padding-left: 20px; position: relative; }
.product-panel ul li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.62em;
  width: 10px; height: 2px;
}
.product-panel.vent ul li::before { background: var(--vent); }
.product-panel.ember ul li::before { background: var(--ember); }
.product-panel .btn { align-self: flex-start; margin-top: 8px; }

/* ---------- feature rows ---------- */

.feature-row {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}
.feature-row:last-child { border-bottom: 1px solid var(--line); }
.feature-row h3 { font-size: 1.02rem; }
.feature-row p { color: var(--ink-soft); font-size: 0.97rem; max-width: 56em; }
.feature-row .flabel {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding-top: 4px;
}

/* ---------- spec table ---------- */

.spec-table { width: 100%; border-collapse: collapse; font-size: 0.95rem; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.spec-table th, .spec-table td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--line); vertical-align: top; }
.spec-table th { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-soft); font-weight: 500; background: #EDF2F0; }
.spec-table tr:last-child td { border-bottom: none; }
.spec-table td:first-child { font-weight: 600; width: 220px; }

/* ---------- quote / pitch ---------- */

.pitch {
  border-left: 3px solid var(--gold);
  padding: 6px 0 6px 26px;
  font-family: var(--font-display);
  font-weight: 550;
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
  line-height: 1.4;
  max-width: 34em;
}
.pitch .who {
  display: block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  font-weight: 500;
}
.on-dark .pitch .who { color: #8FA5A9; }

/* ---------- CTA band ---------- */

.cta-band { text-align: left; }
.cta-band .inner {
  background: linear-gradient(120deg, var(--stratum) 0%, var(--abyss) 100%);
  border: 1px solid var(--line-dark);
  border-radius: 16px;
  padding: 52px 48px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  color: #EDF3F2;
}
.cta-band h2 { color: #F4F8F7; margin-bottom: 8px; }
.cta-band p { color: #A9BCC0; max-width: 34em; }
.cta-band .actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- forms ---------- */

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-grid .full { grid-column: 1 / -1; }
label { font-size: 0.85rem; font-weight: 600; display: block; margin-bottom: 6px; }
input, select, textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--vent);
  outline-offset: 0;
  border-color: var(--vent);
}
.form-note { font-size: 0.85rem; color: var(--ink-soft); }

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

.site-footer {
  background: var(--abyss);
  color: #9FB3B7;
  padding: 56px 0 40px;
  border-top: 1px solid var(--line-dark);
  font-size: 0.9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 36px;
}
.site-footer h4 {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #7E969B;
  font-weight: 500;
  margin-bottom: 14px;
}
.site-footer a { color: #C6D4D6; }
.site-footer a:hover { color: #fff; }
.site-footer ul { list-style: none; display: grid; gap: 8px; }
.footer-brand { color: #F2F6F5; font-family: var(--font-display); font-weight: 700; letter-spacing: 0.05em; margin-bottom: 12px; display: flex; gap: 10px; align-items: center; }
.footer-legal {
  border-top: 1px solid var(--line-dark);
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  justify-content: space-between;
  font-size: 0.82rem;
  color: #7E969B;
}

/* ---------- strata diagram (signature element) ---------- */

.strata-figure { width: 100%; }
.strata-caption {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: #7E969B;
  margin-top: 12px;
}

/* ---------- utility ---------- */

.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; } .mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.muted { color: var(--ink-soft); }
.small { font-size: 0.9rem; }

.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--ink-soft);
  background: #fff;
}
.badge.live { border-color: var(--vent); color: var(--vent-deep); background: var(--vent-tint); }

/* ---------- motion ---------- */

.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; transition: none !important; }
}

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

@media (max-width: 900px) {
  .hero-grid, .product-split, .grid-3, .grid-4, .footer-grid, .form-grid { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .feature-row { grid-template-columns: 1fr; gap: 8px; }
  section { padding: 60px 0; }
  .hero { padding: 64px 0; }

  .menu-toggle {
    display: inline-flex;
    margin-left: auto;
    background: none;
    border: 1px solid var(--line-dark);
    color: #E3ECEC;
    border-radius: 8px;
    padding: 8px 12px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    cursor: pointer;
  }
  .nav {
    display: none;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: var(--abyss);
    border-bottom: 1px solid var(--line-dark);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 24px 20px;
    gap: 2px;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 10px; }
  .nav .cta { margin: 10px 0 0; justify-content: center; display: flex; }
}