/* ============================================================
   LAYOUT — estructura, nav, grid, responsive base
   ============================================================ */

.container{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
  z-index: 2;
}

section{
  position: relative;
  padding: 108px 0;
}

.section-head{
  max-width: 640px;
  margin-bottom: 56px;
}

.kicker{
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 16px;
}

.section-head h2{
  font-size: clamp(28px, 3.6vw, 42px);
}

.section-head p{
  color: var(--cream-dim);
  font-size: 17px;
  margin-top: 14px;
}

/* ---------- 3D canvas + vignette ---------- */
#scene-container{
  position: fixed;
  inset: 0;
  z-index: 0;
  background: var(--bg-deep);
}
#scene-container canvas{ display: block; }

.vignette{
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(ellipse at center, transparent 35%, rgba(10, 8, 5, 0.55) 78%, rgba(10, 8, 5, 0.92) 100%);
}

/* ---------- scroll progress ---------- */
#scroll-progress{
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  z-index: 100;
  transition: width 0.1s linear;
}

/* ---------- nav ---------- */
.nav{
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 60;
  padding: 20px 0;
  background: rgba(10, 8, 5, 0.55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--gold-line);
}

.nav-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand{
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.01em;
}

.brand-mark{
  width: 34px; height: 34px;
  border-radius: var(--radius);
  background: var(--gold);
  color: var(--bg-deep);
  display: flex; align-items: center; justify-content: center;
  flex: none;
}
.brand-mark svg{ width: 18px; height: 18px; }

.nav-links{
  display: flex;
  align-items: center;
  gap: 36px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.nav-links a{
  color: var(--cream-dim);
  transition: color 0.25s var(--ease);
  position: relative;
}
.nav-links a:hover{ color: var(--gold-light); }

/* ---------- grids ---------- */
.grid-6{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.grid-3{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.grid-stats{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.split{
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 64px;
  align-items: center;
}
.split.reverse{ grid-template-columns: 0.9fr 1fr; }
.split.reverse .split-visual{ order: -1; }

.split-visual{
  min-height: 320px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gold-line);
  background: var(--bg-surface-soft);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

/* ---------- footer ---------- */
footer{
  border-top: 1px solid var(--gold-line);
  background: rgba(10, 8, 5, 0.6);
  backdrop-filter: blur(10px);
  padding: 72px 0 0;
}

.footer-grid{
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-col h4{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 18px;
  font-weight: 600;
}

.footer-col ul{ display: flex; flex-direction: column; gap: 10px; }
.footer-col a{ color: var(--cream-dim); font-size: 14.5px; transition: color .2s var(--ease); }
.footer-col a:hover{ color: var(--gold-light); }

.footer-bottom{
  border-top: 1px solid var(--gold-line);
  padding: 22px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cream-faint);
  flex-wrap: wrap;
  gap: 10px;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px){
  .container{ padding: 0 22px; }
  section{ padding: 76px 0; }

  .nav-links{ display: none; }

  .grid-6, .grid-3{ grid-template-columns: repeat(2, 1fr); }
  .grid-stats{ grid-template-columns: repeat(2, 1fr); }

  .split, .split.reverse{
    grid-template-columns: 1fr;
    gap: 34px;
  }
  .split.reverse .split-visual{ order: 0; }
  .split-visual{ min-height: 220px; }

  .footer-grid{ grid-template-columns: repeat(2, 1fr); gap: 32px; }
}

@media (max-width: 500px){
  section{ padding: 60px 0; }
  .grid-6, .grid-3, .grid-stats{ grid-template-columns: 1fr; }
  .footer-grid{ grid-template-columns: 1fr; }
  .footer-bottom{ flex-direction: column; align-items: flex-start; }
}