/* ==========================================================================
   Design tokens
   ========================================================================== */
:root {
  --bg:         #060606;
  --bg-raised:  #0d0d0d;
  --bg-card:    #101010;
  --border:     #232323;
  --border-lt:  #363636;
  --fg:         #f4f4f4;
  --fg-dim:     #9a9a9a;
  --fg-faint:   #5c5c5c;

  --font-display: 'Space Grotesk', 'Arial Narrow', sans-serif;
  --font-body:    'Inter', -apple-system, sans-serif;
  --font-mono:    'IBM Plex Mono', 'Courier New', monospace;

  --nav-h: 76px;
  --edge: 6vw;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

::selection { background: var(--fg); color: var(--bg); }

:focus-visible {
  outline: 1px solid var(--fg);
  outline-offset: 3px;
}

/* ==========================================================================
   Background canvas (3D particle field — see js/particles.js)
   ========================================================================== */
#bg-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* vignette so text stays legible over the particle field */
.bg-vignette {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(ellipse at center, rgba(6,6,6,0) 0%, rgba(6,6,6,0.55) 68%, rgba(6,6,6,0.95) 100%);
}

/* ==========================================================================
   Layout shell
   ========================================================================== */
.page { position: relative; z-index: 2; }

.wrap {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding-left: var(--edge);
  padding-right: var(--edge);
}

/* ==========================================================================
   Nav
   ========================================================================== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--edge);
  background: linear-gradient(to bottom, rgba(6,6,6,0.92) 0%, rgba(6,6,6,0) 100%);
  backdrop-filter: blur(2px);
}

.nav__mark {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav__logo {
  height: 56px;
  width: auto;
  display: block;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 42px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.nav__links a {
  position: relative;
  color: var(--fg-dim);
  padding: 6px 0;
  transition: color 0.2s ease;
}
.nav__links a:hover,
.nav__links a[aria-current="page"] { color: var(--fg); }
.nav__links a[aria-current="page"]::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--fg);
}

.nav__toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-lt);
  color: var(--fg);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 8px 12px;
  cursor: pointer;
}

/* ==========================================================================
   Eyebrow / labels
   ========================================================================== */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-faint);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
}
.eyebrow::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--fg-faint);
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: var(--nav-h);
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.6rem, 6.4vw, 5.6rem);
  line-height: 1.02;
  letter-spacing: -0.01em;
  max-width: 16ch;
}

.hero__sub {
  margin-top: 26px;
  max-width: 46ch;
  color: var(--fg-dim);
  font-size: 1.05rem;
}

.hero__meta {
  display: flex;
  gap: 48px;
  margin-top: 64px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.hero__meta div { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em; color: var(--fg-faint); }
.hero__meta strong { display: block; color: var(--fg); font-size: 13px; margin-bottom: 6px; letter-spacing: 0.02em; }

.cta-row { display: flex; gap: 16px; margin-top: 40px; flex-wrap: wrap; }

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 15px 26px;
  border: 1px solid var(--fg);
  background: transparent;
  color: var(--fg);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.btn:hover { background: var(--fg); color: var(--bg); }

.btn--ghost { border-color: var(--border-lt); color: var(--fg-dim); }
.btn--ghost:hover { border-color: var(--fg); color: var(--fg); background: transparent; }

/* ==========================================================================
   Sections
   ========================================================================== */
section { position: relative; padding: 120px 0; }
.section--tight { padding: 80px 0; }
.divider { border: none; border-top: 1px solid var(--border); }

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

.section-head h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.8rem, 3.4vw, 2.7rem);
  max-width: 14ch;
}

.section-head p { max-width: 38ch; color: var(--fg-dim); font-size: 0.95rem; }

/* ==========================================================================
   Grids / cards
   ========================================================================== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--bg-card);
  padding: 40px 34px;
  transition: background 0.25s ease;
}
.card:hover { background: var(--bg-raised); }

.card__index {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-faint);
  letter-spacing: 0.08em;
  margin-bottom: 28px;
}

.card h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.3rem;
  margin-bottom: 14px;
}

.card p { color: var(--fg-dim); font-size: 0.92rem; }

.card__spec {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-faint);
  letter-spacing: 0.04em;
}

.card__download {
  margin-top: 24px;
  font-size: 11.5px;
  padding: 12px 20px;
}

/* ==========================================================================
   Timeline (about page)
   ========================================================================== */
.timeline { border-top: 1px solid var(--border); }
.timeline__row {
  display: grid;
  grid-template-columns: 90px 140px 1fr;
  gap: 32px;
  padding: 30px 0;
  border-bottom: 1px solid var(--border);
  align-items: baseline;
}
.timeline__row span:first-child { font-family: var(--font-mono); color: var(--fg-faint); font-size: 12px; }
.timeline__row strong { font-family: var(--font-display); font-size: 1.05rem; font-weight: 500; }
.timeline__row p { color: var(--fg-dim); font-size: 0.92rem; }

/* ==========================================================================
   Stats strip
   ========================================================================== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.stats div { padding: 34px var(--edge); border-left: 1px solid var(--border); }
.stats div:first-child { border-left: none; }
.stats strong {
  display: block;
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 500;
}
.stats span { font-family: var(--font-mono); font-size: 11px; color: var(--fg-faint); letter-spacing: 0.06em; text-transform: uppercase; }

/* ==========================================================================
   Form
   ========================================================================== */
.form-shell { max-width: 640px; }

.field { margin-bottom: 26px; }

.field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin-bottom: 10px;
}

.field input,
.field textarea {
  width: 100%;
  background: var(--bg-raised);
  border: 1px solid var(--border-lt);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 14px 16px;
  transition: border-color 0.2s ease;
}
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--fg);
}
.field textarea { min-height: 140px; resize: vertical; }

.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

.form-status {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  margin-top: 18px;
  min-height: 18px;
}
.form-status[data-state="ok"] { color: var(--fg); }
.form-status[data-state="err"] { color: #d4544a; }

.contact-meta {
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.contact-meta__item strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin-bottom: 8px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
footer {
  border-top: 1px solid var(--border);
  padding: 80px var(--edge) 40px;
}

.footer__brand {
  display: flex;
  justify-content: center;
  padding-bottom: 56px;
}

.footer__logo {
  width: min(460px, 62%);
  height: auto;
  opacity: 0.95;
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--fg-faint);
  letter-spacing: 0.04em;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 860px) {
  .nav__links {
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }
  .nav__links.is-open { max-height: 320px; }
  .nav__links a { width: 100%; padding: 18px var(--edge); border-bottom: 1px solid var(--border); }
  .nav__toggle { display: block; }

  .grid, .grid--2 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stats div:nth-child(3) { border-left: none; }
  .field-row { grid-template-columns: 1fr; }
  .timeline__row { grid-template-columns: 1fr; gap: 6px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}