/* ===================================
   NAVBAR — Navigation & Mobile Menu
   =================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(10, 10, 10, 0.72);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--border);
  z-index: 200;
  padding: 0.875rem 0;
  transition: background var(--t) ease, border-color var(--t) ease;
  will-change: background;
}

.navbar.scrolled {
  background: rgba(10, 10, 10, 0.96);
  border-color: var(--border-hover);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'Outfit', sans-serif;
  font-weight: 900;
  font-size: 1.15rem;
  letter-spacing: 0.12em;
  color: var(--text-primary);
  flex-shrink: 0;
  transition: opacity var(--t) ease;
}
.logo:hover { opacity: 0.8; }
.logo-icon { color: var(--accent); }

/* Desktop nav links */
.nav-links {
  display: flex;
  gap: 1.75rem;
  flex: 1;
  justify-content: center;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--t-fast) ease;
  white-space: nowrap;
  position: relative;
  padding-bottom: 2px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--accent);
  border-radius: 1px;
  transition: width var(--t) var(--ease);
}

.nav-links a:hover,
.nav-links a.active { color: var(--text-primary); }

.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }

/* Nav actions */
.nav-actions {
  display: flex;
  gap: 0.625rem;
  align-items: center;
  flex-shrink: 0;
}

/* ── Hamburger ── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  cursor: pointer;
  padding: 0.5rem 0.6rem;
  z-index: 210;
  transition: border-color var(--t) ease;
}
.hamburger:hover { border-color: var(--border-hover); }

.hamburger span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--t) var(--ease), opacity var(--t-fast) ease;
  transform-origin: center;
}

.hamburger.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.hamburger.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ── Mobile overlay menu ── */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 10, 0.97);
  backdrop-filter: blur(20px);
  z-index: 190;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-slow) var(--ease);
}

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

.mobile-menu a {
  font-family: 'Outfit', sans-serif;
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-secondary);
  padding: 0.5rem 2rem;
  border-radius: var(--radius-sm);
  transition: color var(--t-fast) ease, background var(--t-fast) ease;
  letter-spacing: -0.02em;
}
.mobile-menu a:hover {
  color: var(--accent);
  background: var(--accent-dim);
}

.mobile-menu-actions {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}