/* ── PROGRESS BAR ── */
#progress-bar {
  position: fixed; top: 0; left: 0;
  height: 2px; width: 0%;
  background: linear-gradient(90deg, var(--voltagem) 0%, #a8d42f 100%);
  z-index: 1000; pointer-events: none;
  transition: width 0.08s linear;
}

/* ── CANVAS ── */
#bg-canvas {
  position: fixed; top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0; display: block;
}

/* ── VIGNETTE ── */
#vignette {
  position: fixed; inset: 0;
  background: radial-gradient(ellipse 80% 80% at center,
    transparent 10%,
    rgba(11,11,11,0.44) 62%,
    rgba(11,11,11,0.82) 100%);
  z-index: 1; pointer-events: none;
}

/* ── NAV ── */
nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--sp-lg) var(--sp-2xl);
  transition: background 0.4s, backdrop-filter 0.4s, border-bottom 0.4s;
}
nav.scrolled {
  background: rgba(11,11,11,0.90);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,0.055);
}

.nav-logo {
  font-family: var(--f-display); font-size: 17px; font-weight: 700;
  letter-spacing: -0.5px; text-decoration: none; color: var(--osso); line-height: 1;
}
.nav-logo .dot    { color: var(--voltagem); }
.nav-logo .studio { color: var(--nevoa); font-weight: 400; }

.nav-cta {
  font-family: var(--f-display); font-size: 13px; font-weight: 600;
  letter-spacing: -0.2px; color: var(--carbono); background: var(--voltagem);
  padding: 10px 22px; text-decoration: none; transition: opacity 0.2s;
}
.nav-cta:hover { opacity: 0.82; }