/* ===== NAV ===== */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 60px;
  transition:
    background 0.4s,
    backdrop-filter 0.4s,
    padding 0.4s;
}

nav.scrolled {
  background: rgba(8, 12, 20, 0.85);
  backdrop-filter: blur(20px);
  padding: 16px 60px;
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.5px;
  color: var(--text);
  text-decoration: none;
}

.nav-logo span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 36px;
  list-style: none;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.5px;
  transition: color 0.2s;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s;
}

.nav-links a:hover {
  color: var(--text);
}
.nav-links a:hover::after {
  width: 100%;
}

/* Burger */
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: none;
  padding: 4px;
  z-index: 101;
}

.burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: all 0.3s;
}

.burger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.burger.active span:nth-child(2) {
  opacity: 0;
}
.burger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: rgba(8, 12, 20, 0.97);
  backdrop-filter: blur(30px);
  z-index: 99;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 40px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s;
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: all;
}

.mobile-menu a {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  transition: color 0.2s;
}

.mobile-menu a:hover {
  color: var(--accent);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  nav {
    padding: 20px 24px;
  }
  nav.scrolled {
    padding: 16px 24px;
  }
  .nav-links {
    display: none;
  }
  .burger {
    display: flex;
  }
}