/* ============================================================
   GENRI LABS — LANDING PAGE STYLES
   All color values come from tokens.css. Layout is mobile-first;
   breakpoints at 640px (tablet) and 960px (desktop).
   ============================================================ */

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

html { scroll-behavior: smooth; }

body {
  background: var(--color-bg);
  color: var(--color-text-body);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--color-text);
  font-weight: 500;
  line-height: 1.2;
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); margin-bottom: var(--space-3); }
h3 { font-size: 1.05rem; margin-bottom: var(--space-1); }

h1 em { color: var(--color-accent); font-style: normal; }

a { color: var(--color-accent); text-decoration: none; }
a:focus-visible, .btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* ---------------- Buttons ---------------- */
.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  transition: transform 0.15s ease, background 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }

/* Rule from the palette spec: near-black text on aqua, never white */
.btn--accent { background: var(--color-accent); color: var(--color-on-accent); }
.btn--ghost  { border: 1px solid var(--color-border); color: var(--color-text-body); }
.btn--ghost:hover { background: var(--color-surface); }
.btn--lg { padding: 0.85rem 1.75rem; font-size: 1rem; }

/* ---------------- Nav ---------------- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: 1rem var(--space-3);
  border-bottom: 0.5px solid var(--color-border-soft);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(8px);
  z-index: 10;
}
.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 500;
}
.nav__links { display: none; gap: var(--space-3); }
.nav__links a { color: var(--color-text-muted); font-size: 0.9rem; }
.nav__links a:hover { color: var(--color-text); }

/* Mobile/tablet: links render as a dropdown panel under the header
   when the hamburger toggles the .is-open class. */
.nav__links.is-open {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3) var(--space-3);
  background: var(--color-bg);
  border-bottom: 0.5px solid var(--color-border-soft);
}
.nav__links.is-open a { font-size: 1rem; padding: 0.35rem 0; }

/* Hamburger toggle — mobile/tablet only */
.nav__toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: stretch;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: 7px 6px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav__toggle-bar {
  display: block;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (min-width: 960px) {
  .nav__links,
  .nav__links.is-open {
    display: flex;
    flex-direction: row;
    position: static;
    padding: 0;
    background: none;
    border-bottom: none;
  }
  .nav__links.is-open a { font-size: 0.9rem; padding: 0; }
  .nav__toggle { display: none; }
}

/* ---------------- Hero ---------------- */
.hero {
  position: relative;
  text-align: center;
  padding: var(--space-5) var(--space-3) var(--space-4);
  max-width: var(--content-max);
  margin: 0 auto;
  overflow: hidden;
}
.hero__trace {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 140px;
  pointer-events: none;
}
.badge {
  display: inline-block;
  border: 0.5px solid var(--color-border);
  color: var(--color-info);
  font-size: 0.8rem;
  padding: 0.3rem 0.9rem;
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-2);
}
.hero__sub {
  color: var(--color-text-muted);
  max-width: 520px;
  margin: var(--space-2) auto var(--space-3);
}
.hero__cta { display: flex; gap: var(--space-2); justify-content: center; flex-wrap: wrap; }

/* 3D stage for the rotating hero card. perspective on the parent
   is what makes rotateY read as depth instead of a flat skew. */
.hero__stage { perspective: 1000px; margin-top: var(--space-4); }
.hero__card {
  background: var(--color-surface);
  border: 0.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  max-width: 720px;
  margin: 0 auto;
  aspect-ratio: 16 / 9;
  transform-style: preserve-3d;
  will-change: transform;
}
.hero__card-inner {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  color: var(--color-text-faint);
  font-size: 0.85rem;
}

/* ---------------- Stats ---------------- */
.stats {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 0.5px solid var(--color-border-soft);
  border-bottom: 0.5px solid var(--color-border-soft);
  max-width: var(--content-max);
  margin: 0 auto;
}
.stats__item {
  padding: var(--space-3);
  text-align: center;
  border-bottom: 0.5px solid var(--color-border-soft);
}
.stats__item:last-child { border-bottom: none; }
.stats__num {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--color-accent);
}
.stats__label { color: var(--color-text-muted); font-size: 0.85rem; }

@media (min-width: 640px) {
  .stats { grid-template-columns: repeat(3, 1fr); }
  .stats__item { border-bottom: none; border-right: 0.5px solid var(--color-border-soft); }
  .stats__item:last-child { border-right: none; }
}

/* ---------------- Sections ---------------- */
.section {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-5) var(--space-3);
}
.section--narrow { max-width: 680px; text-align: center; }
.eyebrow {
  color: var(--color-accent);
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: var(--space-1);
}
.prose { color: var(--color-text-muted); }
.prose em { color: var(--color-accent); font-style: normal; }

/* ---------------- Cards ---------------- */
.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  margin-top: var(--space-3);
}
@media (min-width: 640px)  { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px)  { .cards { grid-template-columns: repeat(3, 1fr); }
                             .cards--two { grid-template-columns: repeat(2, 1fr); } }

.card {
  background: var(--color-surface);
  border: 0.5px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.card:hover { border-color: var(--color-accent-dark); transform: translateY(-2px); }
.card p { color: var(--color-text-muted); font-size: 0.92rem; margin-bottom: var(--space-2); }

.card__icon {
  width: 42px; height: 42px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-2);
}
.card__icon svg { width: 22px; height: 22px; }
.card__icon--aqua { background: var(--color-accent-dim); color: var(--color-accent); }
.card__icon--blue { background: var(--color-info-dim);  color: var(--color-info); }

.card__link { font-size: 0.85rem; }
.card__link--blue, .card__title--blue { color: var(--color-info); }

/* ---------------- Contact + footer ---------------- */
.contact .btn { margin-top: var(--space-3); }
.footer {
  display: flex;
  justify-content: space-between;
  padding: var(--space-3);
  border-top: 0.5px solid var(--color-border-soft);
  color: var(--color-text-faint);
  font-size: 0.8rem;
  max-width: var(--content-max);
  margin: 0 auto;
}

/* ---------------- Reduced motion ----------------
   landing.js also checks this, but the CSS guard means
   nothing jumps even before JS loads. */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}