/* ══════════════════════════════════════════════════
   BACKGROUND CANVAS
══════════════════════════════════════════════════ */
#meshCanvas {
  position:fixed; inset:0;
  width:100%; height:100%;
  z-index:0; pointer-events:none;
  opacity:.55;
}

/* ══════════════════════════════════════════════════
   NAVBAR
══════════════════════════════════════════════════ */
.nav {
  position:fixed; top:0; left:0; right:0;
  height: var(--nav-h);
  display:flex; align-items:center;
  background: rgba(6,6,11,.55);
  backdrop-filter: saturate(180%) blur(24px);
  -webkit-backdrop-filter: saturate(180%) blur(24px);
  border-bottom: 1px solid transparent;
  z-index:1000;
  transition: background .3s, border-color .3s;
}
.nav.scrolled {
  background: rgba(6,6,11,.85);
  border-bottom-color: var(--border);
}
.nav-inner {
  max-width: var(--max-w); margin:0 auto; padding:0 32px;
  width:100%; display:flex; align-items:center;
  justify-content:space-between; gap:24px;
}
.nav-logo { display:flex; align-items:center; }
.nav-logo img { height:36px; }

.nav-links {
  display:flex; align-items:center; gap:2px;
  list-style:none;
}
.nav-links a {
  display:block; padding:8px 14px;
  font-size:13.5px; font-weight:500;
  color: var(--text-dim);
  border-radius:8px;
  transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,.04); }
.nav-links a.active { color: var(--text); }

.nav-right {
  display:flex; align-items:center; gap:10px;
}
.lang-toggle {
  display:flex; align-items:center; gap:6px;
  padding:8px 12px;
  background: rgba(255,255,255,.03);
  border:1px solid var(--border-m);
  border-radius:8px;
  font-family: var(--font-mono);
  font-size:12px; font-weight:500;
  color: var(--text-dim);
  cursor:pointer;
  transition: border-color .2s, color .2s;
}
.lang-toggle:hover { border-color: var(--border-s); color: var(--text); }
.lang-toggle svg { width:13px; height:13px; }

.btn {
  display:inline-flex; align-items:center; gap:8px;
  padding:9px 18px;
  font-size:13.5px; font-weight:500;
  border-radius:8px;
  cursor:pointer;
  transition: transform .2s var(--ease), box-shadow .3s, background .2s, border-color .2s;
  white-space:nowrap;
  border:none;
  position:relative;
}
.btn svg { width:14px; height:14px; }
.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 1px 0 rgba(255,255,255,.15) inset, 0 0 0 1px rgba(139,92,246,.2);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(139,92,246,.35), 0 0 0 1px rgba(139,92,246,.4); }
.btn-secondary {
  background: rgba(255,255,255,.04);
  color: var(--text);
  border: 1px solid var(--border-m);
}
.btn-secondary:hover { background: rgba(255,255,255,.08); border-color: var(--border-s); transform: translateY(-1px); }
.btn-ghost { background:transparent; color: var(--text-dim); padding: 8px 12px; }
.btn-ghost:hover { color: var(--text); }
.btn-lg { padding: 13px 26px; font-size: 14.5px; }

.nav-toggle {
  display:none; flex-direction:column; gap:5px;
  background:none; border:none; cursor:pointer;
  width:36px; height:36px; align-items:center; justify-content:center;
}
.nav-toggle span {
  display:block; width:22px; height:1.5px;
  background: var(--text); border-radius:2px;
  transition: transform .3s, opacity .3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity:0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile {
  position:fixed; top:var(--nav-h); left:0; right:0;
  background: rgba(6,6,11,.98);
  backdrop-filter: blur(24px);
  border-bottom:1px solid var(--border);
  padding:24px;
  z-index:999;
  transform: translateY(-100%);
  transition: transform .35s var(--ease);
  max-height: calc(100vh - var(--nav-h));
  overflow-y:auto;
}
.nav-mobile.open { transform: translateY(0); }
.nav-mobile ul { list-style:none; display:flex; flex-direction:column; gap:2px; margin-bottom:20px; }
.nav-mobile ul a {
  display:block; padding:14px 16px;
  font-size:16px; font-weight:500; color:var(--text-dim);
  border-radius:10px;
  transition: background .2s, color .2s;
}
.nav-mobile ul a:hover { background:rgba(255,255,255,.05); color:var(--text); }
.nav-mobile .btn { width:100%; justify-content:center; }

/* ══════════════════════════════════════════════════
   SECTIONS — base
══════════════════════════════════════════════════ */
section { position:relative; z-index:2; padding: var(--section-py) 0; }

.section-head { text-align:center; margin-bottom:72px; }
.section-head h2 {
  font-size: clamp(2rem, 3.8vw, 3.2rem);
  font-weight: var(--h-weight-default);   /* 600 — home baseline */
  letter-spacing: -.03em;
  margin-bottom: 16px;
  line-height: 1.1;
}
.section-head p {
  font-size:1.0625rem; color: var(--text-dim);
  max-width:580px; margin:0 auto; line-height:1.6;
}