/* =========================================================================
   Nard0 — marketing site
   Mirrors the app's "Engineering Console" system: dark base, monospace chrome,
   hairline rules, blueprint grid, a single cyan accent. Standalone (no build).
   ========================================================================= */

:root {
  --base: #0a0b0d;
  --surface: #121419;
  --surface-2: #181b22;
  --elev: #1f232c;
  --hairline: rgba(255, 255, 255, 0.06);
  --rule: rgba(255, 255, 255, 0.12);
  --rule-strong: rgba(255, 255, 255, 0.22);

  --ink: #ecedf0;
  --ink-dim: #8b909b;
  --ink-faint: #555a65;
  --ink-mute: #3a3e47;

  --cyan: #00d4ff;
  --cyan-soft: rgba(0, 212, 255, 0.14);
  --cyan-edge: rgba(0, 212, 255, 0.42);

  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --font-sans: "DM Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;

  --maxw: 1120px;
  --header-h: 60px;
}

* { box-sizing: border-box; }

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  color-scheme: dark;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
}

body {
  margin: 0;
  background: var(--base);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  font-feature-settings: "ss01", "cv11";
  overflow-x: hidden;
}

::selection { background: var(--cyan-soft); color: var(--cyan); }

a { color: inherit; text-decoration: none; }

h1, h2, h3 { margin: 0; font-weight: 500; letter-spacing: -0.01em; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }

/* ---------- shared bits ---------- */
.mark { color: var(--ink); display: block; }
.wordmark {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--ink);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--cyan-edge);
}

.arrow { display: inline-block; transition: transform 0.18s ease; }

/* ---------- buttons ---------- */
.btn {
  --pad-y: 11px;
  --pad-x: 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: var(--pad-y) var(--pad-x);
  border-radius: 4px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.16s ease, border-color 0.16s ease, color 0.16s ease,
    box-shadow 0.16s ease;
  white-space: nowrap;
}
.btn-sm { --pad-y: 8px; --pad-x: 14px; font-size: 12px; }
.btn-lg { --pad-y: 14px; --pad-x: 22px; font-size: 14px; }

.btn-primary {
  background: var(--cyan-soft);
  border-color: var(--cyan-edge);
  color: var(--cyan);
}
.btn-primary:hover {
  background: var(--cyan);
  color: var(--base);
  box-shadow: 0 0 0 1px var(--cyan-edge), 0 0 24px -6px var(--cyan-soft);
}
.btn-primary:hover .arrow { transform: translateX(3px); }

.btn-ghost {
  background: transparent;
  border-color: var(--rule);
  color: var(--ink-dim);
}
.btn-ghost:hover { border-color: var(--rule-strong); color: var(--ink); }

/* ---------- header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 0 28px;
  background: color-mix(in srgb, var(--base) 78%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hairline);
}
.brand { display: inline-flex; align-items: center; gap: 10px; }
.nav-links {
  display: flex;
  gap: 26px;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-dim);
}
.nav-links a { position: relative; padding: 4px 0; transition: color 0.15s ease; }
.nav-links a:hover { color: var(--ink); }
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 1px;
  background: var(--cyan);
  transition: width 0.2s ease;
}
.nav-links a:hover::after { width: 100%; }
.site-header .btn-primary { margin-left: 4px; }

/* ---------- backgrounds ---------- */
.grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.024) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.024) 1px, transparent 1px);
  background-size: 30px 30px;
  pointer-events: none;
}
.grid-bg.faint { opacity: 0.5; }
.vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 60% at 60% 40%,
    rgba(255, 255, 255, 0.02) 0%, transparent 62%);
  pointer-events: none;
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 72px) 32px 88px;
  overflow: hidden;
}
.hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 56px;
  align-items: center;
}
/* Grid/flex children default to min-width:auto and won't shrink below their
   content — a wide SVG or long mono string then forces the whole document wider
   than the viewport. Let them shrink. */
.hero-copy,
.hero-drawing,
.verify-copy,
.verify-list { min-width: 0; }

.hero-copy h1 {
  font-size: clamp(34px, 4.6vw, 56px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
}
.lede {
  font-size: 17px;
  line-height: 1.62;
  color: var(--ink-dim);
  max-width: 30em;
  margin: 0 0 30px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 34px; }

.spec-strip {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
}
.spec-strip i { width: 4px; height: 4px; background: var(--ink-mute); border-radius: 50%; }

/* ---------- hero drawing ---------- */
.hero-drawing { position: relative; }
.prompt-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-dim);
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: 8px 12px;
  margin-bottom: 14px;
}
.chip-caret { color: var(--cyan); }
.drawing { width: 100%; max-width: 100%; height: auto; display: block; overflow: visible; }
.prompt-chip { max-width: 100%; overflow: hidden; }
.drawing .tick { stroke: var(--cyan); stroke-width: 1; }
.dim-txt {
  font-family: var(--font-mono);
  font-size: 12px;
  fill: var(--ink-dim);
  letter-spacing: 0.02em;
}
.title-block rect,
.title-block line { stroke: var(--rule); fill: none; }
.title-block rect { fill: rgba(18, 20, 25, 0.6); }
.tb-brand { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em; fill: var(--ink); }
.tb-k { font-family: var(--font-mono); font-size: 8px; letter-spacing: 0.08em; fill: var(--ink-faint); }
.tb-v { font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.04em; fill: var(--ink-dim); }

/* draw-in animation for the line work */
.drawing .ln {
  stroke-dasharray: 100;
  stroke-dashoffset: 100;
  animation: draw 0.9s cubic-bezier(0.4, 0, 0.1, 1) forwards;
  animation-delay: calc(300ms + var(--i, 0) * 90ms);
}
.drawing .part .bore { animation-duration: 1.1s; }
.drawing .notes,
.drawing .tick,
.drawing .ctr,
.drawing .ctr-dot,
.drawing .datum,
.drawing .title-block { opacity: 0; animation: fade 0.6s ease forwards 1250ms; }

@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes fade { to { opacity: 1; } }

/* ---------- bands ---------- */
.band { position: relative; padding: 96px 0; border-top: 1px solid var(--hairline); }
.band-alt { background: var(--surface); }
.band h2 {
  font-size: clamp(26px, 3.2vw, 38px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 18em;
}
.section-lede {
  color: var(--ink-dim);
  font-size: 16px;
  max-width: 40em;
  margin: 18px 0 0;
}

/* ---------- steps ---------- */
.steps {
  list-style: none;
  margin: 52px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: 6px;
  overflow: hidden;
}
.step { background: var(--base); padding: 30px 28px 34px; position: relative; }
.band-alt .step { background: var(--surface); }
.step-no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--cyan);
}
.step h3 { font-size: 19px; margin: 14px 0 10px; }
.step p { color: var(--ink-dim); margin: 0; font-size: 15px; }

/* ---------- capability grid ---------- */
.cap-grid {
  margin-top: 52px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.cap {
  position: relative;
  background: var(--base);
  border: 1px solid var(--hairline);
  border-radius: 6px;
  padding: 26px 24px 28px;
  transition: border-color 0.18s ease, transform 0.18s ease, background 0.18s ease;
}
.band-alt .cap { background: var(--surface-2); }
.cap:hover { border-color: var(--rule); transform: translateY(-2px); }
/* corner-bracket accent on hover — echoes the mark */
.cap::before,
.cap::after {
  content: "";
  position: absolute;
  width: 9px; height: 9px;
  border: 1px solid var(--cyan-edge);
  opacity: 0;
  transition: opacity 0.18s ease;
}
.cap::before { top: 8px; left: 8px; border-right: 0; border-bottom: 0; }
.cap::after { bottom: 8px; right: 8px; border-left: 0; border-top: 0; }
.cap:hover::before, .cap:hover::after { opacity: 1; }
.cap-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--cyan);
  background: var(--cyan-soft);
  border: 1px solid var(--cyan-edge);
  border-radius: 3px;
  padding: 3px 7px;
  margin-bottom: 16px;
}
.cap h3 { font-size: 17px; margin: 0 0 9px; }
.cap p { color: var(--ink-dim); margin: 0; font-size: 14px; line-height: 1.55; }

/* ---------- verification band ---------- */
.verify { overflow: hidden; }
.verify-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.verify-copy h2 { margin-top: 4px; }
.verify-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: 6px;
  overflow: hidden;
}
.verify-list li {
  background: var(--surface);
  padding: 20px 22px;
  color: var(--ink-dim);
  font-size: 15px;
}
.v-k {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink);
  margin-bottom: 5px;
}

/* ---------- closing cta ---------- */
.cta {
  position: relative;
  padding: 104px 32px;
  text-align: center;
  border-top: 1px solid var(--hairline);
  overflow: hidden;
}
.cta-inner { position: relative; z-index: 1; display: flex; flex-direction: column; align-items: center; }
.cta-mark { color: var(--ink); margin-bottom: 22px; }
.cta h2 { font-size: clamp(26px, 3.4vw, 40px); letter-spacing: -0.02em; }
.cta p { color: var(--ink-dim); margin: 14px 0 28px; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--hairline); padding: 30px 0; }
.foot-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.foot-note {
  color: var(--ink-faint);
  font-size: 12px;
  margin: 0;
  flex: 1 1 260px;
}
.foot-link {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-dim);
  transition: color 0.15s ease;
}
.foot-link:hover { color: var(--cyan); }

/* ---------- scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.55s cubic-bezier(0.2, 0, 0, 1),
    transform 0.55s cubic-bezier(0.2, 0, 0, 1);
  transition-delay: var(--d, 0ms);
}
.reveal.in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 44px; }
  .hero-drawing { max-width: 460px; order: 2; }
  .verify-inner { grid-template-columns: 1fr; gap: 32px; }
  .steps { grid-template-columns: 1fr; }
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .nav-links { display: none; }
}

@media (max-width: 560px) {
  .wrap { padding: 0 20px; }
  .hero { padding: calc(var(--header-h) + 44px) 20px 64px; }
  .band { padding: 68px 0; }
  .cta { padding: 76px 20px; }
  .cap-grid { grid-template-columns: 1fr; }
  .site-header { padding: 0 16px; gap: 14px; }
  .spec-strip { flex-wrap: wrap; gap: 10px; }
  .foot-link { margin-left: 0; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .drawing .ln { stroke-dashoffset: 0; animation: none; }
  .drawing .notes,
  .drawing .tick,
  .drawing .ctr,
  .drawing .ctr-dot,
  .drawing .datum,
  .drawing .title-block { opacity: 1; animation: none; }
  .arrow { transition: none; }
}