/* ============================================================
   ALTMATTER SYSTEMS — components.css (part 1: chrome + hero)
   ============================================================ */

.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-4), 4vw, var(--space-10));
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 200;
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
}
.skip-link:focus { top: var(--space-2); }

.mono-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.mono-label::before {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--color-accent);
}

/* ---------- Header ---------- */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in oklab, var(--color-bg) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-interactive), box-shadow 0.3s cubic-bezier(0.16,1,0.3,1);
}
.header--scrolled {
  border-bottom-color: oklch(from var(--color-text) l c h / 0.08);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding-block: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}
.brand svg { flex-shrink: 0; }
.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  letter-spacing: 0.01em;
}
.brand-name span { color: var(--color-text-muted); font-weight: 500; }

.nav { display: flex; align-items: center; gap: var(--space-6); }
.nav a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding-block: var(--space-2);
}
.nav a:hover { color: var(--color-text); }

.header-actions { display: flex; align-items: center; gap: var(--space-3); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
}
.theme-toggle:hover { color: var(--color-text); background: var(--color-surface-offset); }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-primary:active { background: var(--color-primary-active); transform: translateY(1px); }
.btn-ghost {
  color: var(--color-text);
  border: 1px solid oklch(from var(--color-text) l c h / 0.18);
}
.btn-ghost:hover { border-color: oklch(from var(--color-text) l c h / 0.4); }
.btn-ghost:active { transform: translateY(1px); }

/* ---------- Mobile nav ---------- */

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text);
}
.nav-toggle:hover { background: var(--color-surface-offset); }

@media (max-width: 860px) {
  .header {
    /* backdrop-filter would create a containing block for the fixed .nav — disable on mobile */
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: color-mix(in oklab, var(--color-bg) 96%, transparent);
  }
  .header.nav-open { background: var(--color-bg); }
  .nav {
    position: fixed;
    left: 0;
    right: 0;
    top: 72px;
    height: calc(100dvh - 72px);
    width: 100vw;
    z-index: 90;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--space-8) clamp(var(--space-4), 4vw, var(--space-10)) var(--space-10);
    background: var(--color-bg);
    overflow-y: auto;
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity 0.24s cubic-bezier(0.16,1,0.3,1), transform 0.24s cubic-bezier(0.16,1,0.3,1), visibility 0s linear 0.24s;
  }
  .nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: opacity 0.24s cubic-bezier(0.16,1,0.3,1), transform 0.24s cubic-bezier(0.16,1,0.3,1);
  }
  .nav a {
    width: 100%;
    font-size: var(--text-lg);
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--color-text);
    padding-block: var(--space-4);
    border-bottom: 1px solid var(--color-divider);
  }
  .nav-toggle { display: inline-flex; }
  .header .header-actions .btn-primary { display: none; }
  .nav .btn-primary { display: inline-flex; margin-top: var(--space-6); width: 100%; border-bottom: none; }
}
@media (min-width: 861px) {
  .nav .btn-primary { display: none; }
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  overflow: clip;
  min-height: min(88vh, 900px);
  display: flex;
  align-items: center;
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
}

#lattice {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.9;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(100deg,
    var(--color-bg) 0%,
    color-mix(in oklab, var(--color-bg) 86%, transparent) 42%,
    transparent 78%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  align-items: center;
  gap: clamp(var(--space-8), 5vw, var(--space-20));
}
.hero-copy { min-width: 0; }

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.025em;
  color: var(--hero-ink);
  max-width: 12ch;
}
.hero h1 em {
  font-style: normal;
  color: var(--color-primary);
}

.hero-sub {
  margin-top: var(--space-6);
  font-size: var(--text-lg);
  line-height: 1.55;
  color: var(--color-text-muted);
  max-width: 46ch;
}

.hero-cta {
  margin-top: var(--space-10);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.hero-meta {
  margin-top: clamp(var(--space-12), 8vw, var(--space-20));
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-10);
  border-top: 1px solid oklch(from var(--color-text) l c h / 0.1);
  padding-top: var(--space-5);
}
.hero-meta div {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}
.hero-meta strong {
  display: block;
  color: var(--color-text-muted);
  font-weight: 500;
  margin-top: var(--space-1);
}

/* ---------- Hero prototype device (exploded CAD view) ---------- */

.device {
  --explode: 0;
  --rot-y: 0deg;
  --rot-x: 16deg;
  position: relative;
  width: 100%;
  max-width: 480px;
  margin-inline: auto;
  align-self: center;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(var(--space-4), 3vw, var(--space-8));
  perspective: 1100px;
  perspective-origin: 50% 42%;
}
.device__stage {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  transform-style: preserve-3d;
  transform: rotateX(var(--rot-x)) rotateY(var(--rot-y));
  will-change: transform;
}
.device__layer {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  transform: translateZ(calc((var(--depth) - 2) * var(--explode) * 64px));
  filter: drop-shadow(0 14px 26px oklch(0.25 0.02 270 / 0.22));
}
.device__layer svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}
.device__legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
  opacity: var(--explode);
  transform: translateX(calc((1 - var(--explode)) * 10px));
  transition: opacity 0.25s linear, transform 0.25s linear;
}
.device__legend li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  white-space: nowrap;
}
.device__legend .dot {
  width: 9px;
  height: 9px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}
.dot--sensor { background: var(--color-primary); }
.dot--haptic { background: var(--color-accent); }
.dot--soc { background: var(--color-primary); border: 2px solid var(--color-accent); }
.dot--cell { background: var(--color-primary-highlight); border: 1px solid var(--color-primary); }
.dot--chassis { background: var(--color-text-faint); }

.device__hint {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2.5rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  opacity: calc(1 - var(--explode));
  transition: opacity 0.2s linear;
  pointer-events: none;
}

@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; }
  .device {
    max-width: 340px;
    margin-top: var(--space-12);
    order: 2;
    grid-template-columns: 1fr;
    justify-items: center;
  }
  .device__legend {
    grid-auto-flow: column;
    flex-wrap: wrap;
    justify-content: center;
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .device { --explode: 0.7; }
  .device__layer { transition: none; }
  .device__hint { display: none; }
}

/* ---------- Marquee strip ---------- */

.strip {
  border-block: 1px solid var(--color-divider);
  background: var(--color-surface);
  overflow: hidden;
  padding-block: var(--space-4);
}
.strip-track {
  display: flex;
  width: max-content;
  animation: marquee 40s linear infinite;
}
.strip span {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
}
.strip span::after {
  content: "\25C6";
  font-size: 0.45rem;
  color: var(--color-accent);
  margin-inline: var(--space-10);
}
@keyframes marquee { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) {
  .strip-track { animation: none; flex-wrap: wrap; width: auto; }
}