/* =============================================
   HEADER — Floating Glassmorphism Pill Nav
   ============================================= */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-4) var(--space-6);
  display: flex;
  flex-direction: column;
  align-items: center;
  pointer-events: none;
}

/* =============================================
   NAV PILL
   ============================================= */

.nav-pill {
  width: 100%;
  max-width: 860px;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3) var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  pointer-events: all;

  /* Glass */
  background: rgba(7, 7, 15, 0.65);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.09);
  box-shadow:
    var(--shadow-md),
    0 0 0 1px rgba(139, 92, 246, 0.06) inset,
    0 1px 0 rgba(255, 255, 255, 0.07) inset;

  /* Hidden off-screen right until loader clears */
  opacity: 0;
  transform: translateX(110%);

  transition:
    padding var(--duration-slow) var(--ease-smooth),
    background var(--duration-slow) var(--ease-smooth),
    box-shadow var(--duration-slow) var(--ease-smooth),
    max-width var(--duration-slow) var(--ease-smooth),
    transform 900ms cubic-bezier(0.22, 1, 0.36, 1),
    opacity 700ms cubic-bezier(0.22, 1, 0.36, 1);
}

.nav-pill--visible {
  opacity: 1;
  transform: translateX(0);
}

/* Scroll-shrink state */
.nav-pill.scrolled {
  background: rgba(7, 7, 15, 0.82);
  box-shadow:
    var(--shadow-lg),
    0 0 0 1px rgba(139, 92, 246, 0.1) inset;
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
}

/* Reflective top highlight */
.nav-pill::before {
  content: '';
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.18) 40%,
    rgba(255, 255, 255, 0.18) 60%,
    transparent
  );
  border-radius: var(--radius-pill);
  pointer-events: none;
}

/* =============================================
   BRAND
   ============================================= */

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
  transition: opacity var(--duration-base) var(--ease-smooth);
}

.nav-brand:hover {
  opacity: 0.85;
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 0 16px rgba(139, 92, 246, 0.5);
}

.brand-name {
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

/* =============================================
   DESKTOP NAV LINKS
   ============================================= */

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: auto;
}

.nav-link {
  position: relative;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  transition:
    color var(--duration-base) var(--ease-smooth),
    background var(--duration-base) var(--ease-smooth);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 16px;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--accent-gradient);
  transition: transform var(--duration-base) var(--ease-spring);
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: translateX(-50%) scaleX(1);
}

.nav-link.active {
  color: var(--text-primary);
}

/* =============================================
   NAV CTA
   ============================================= */

.nav-cta {
  flex-shrink: 0;
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-4);
  margin-left: var(--space-2);
}

/* =============================================
   HAMBURGER
   ============================================= */

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  transition: background var(--duration-base) var(--ease-smooth);
  flex-shrink: 0;
  margin-left: auto;
}

.hamburger:hover {
  background: rgba(255, 255, 255, 0.1);
}

.hamburger-bar {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--text-primary);
  transition:
    transform var(--duration-base) var(--ease-smooth),
    opacity var(--duration-base) var(--ease-smooth);
  transform-origin: center;
}

/* Hamburger open state — X morph */
.hamburger[aria-expanded="true"] .hamburger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger[aria-expanded="true"] .hamburger-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger[aria-expanded="true"] .hamburger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* =============================================
   MOBILE MENU — Fullscreen overlay
   ============================================= */

.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 998;
  background: rgba(5, 5, 14, 0.98);
  backdrop-filter: blur(40px) saturate(120%);
  -webkit-backdrop-filter: blur(40px) saturate(120%);
  flex-direction: column;
  align-items: flex-end;
  justify-content: flex-end;
  padding: 0 var(--space-8) var(--space-16);
  transform: translateX(100%);
  transition: transform 520ms cubic-bezier(0.22, 1, 0.36, 1);
  pointer-events: none;
  overflow: hidden;
}

.mobile-menu.open {
  transform: translateX(0);
  pointer-events: all;
}

/* Decorative SVG background */
.mobile-menu-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.mobile-menu-bg svg {
  width: 100%;
  height: 100%;
}

/* Close (×) button — top-right */
.mobile-menu-close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.10);
  color: rgba(248, 250, 252, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 2;
  transition: background 220ms ease, border-color 220ms ease, color 220ms ease;
}

.mobile-menu-close:hover {
  background: rgba(139, 92, 246, 0.18);
  border-color: rgba(139, 92, 246, 0.45);
  color: #fff;
}

/* Nav container — right-aligned, sits at bottom */
.mobile-nav {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.1rem;
  position: relative;
  z-index: 1;
}

/* Nav link row */
.mobile-nav-link {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  text-decoration: none;
  padding: 0.2rem 0;
}

/* Small decorative index number */
.mobile-nav-num {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: rgba(139, 92, 246, 0.45);
  font-variant-numeric: tabular-nums;
  align-self: center;
  transition: color 300ms ease;
}

/* Large link text */
.mobile-nav-text {
  display: block;
  font-size: clamp(3.2rem, 12vw, 5rem);
  font-weight: 900;
  letter-spacing: -0.045em;
  line-height: 1;
  color: rgba(248, 250, 252, 0.75);
  transition: color 300ms ease;
  -webkit-text-fill-color: rgba(248, 250, 252, 0.75);
}

.mobile-nav-link:hover .mobile-nav-num,
.mobile-nav-link.active .mobile-nav-num {
  color: #a78bfa;
}

.mobile-nav-link:hover .mobile-nav-text,
.mobile-nav-link.active .mobile-nav-text {
  background: linear-gradient(135deg, #a78bfa 0%, #60a5fa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* "Get in Touch" gradient pill CTA */
.mobile-nav-cta {
  display: inline-flex;
  align-items: center;
  margin-top: var(--space-8);
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: #fff;
  background: var(--accent-gradient);
  padding: 0.85rem 2.25rem;
  border-radius: var(--radius-pill);
  box-shadow: 0 8px 36px rgba(139, 92, 246, 0.5);
  transition: box-shadow 280ms ease, transform 280ms var(--ease-spring);
}

.mobile-nav-cta:hover {
  color: #fff;
  box-shadow: 0 14px 48px rgba(139, 92, 246, 0.7);
  transform: translateY(-2px);
}

/* ---- Entry animations (slide in from right) ---- */
.mobile-menu.open .mobile-nav-link:nth-child(1) { animation: mm-link-in 480ms var(--ease-out) 130ms both; }
.mobile-menu.open .mobile-nav-link:nth-child(2) { animation: mm-link-in 480ms var(--ease-out) 210ms both; }
.mobile-menu.open .mobile-nav-cta               { animation: mm-link-in 420ms var(--ease-out) 290ms both; }

@keyframes mm-link-in {
  from { opacity: 0; transform: translateX(48px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ---- Exit animations (slide out to right) ---- */
.mobile-menu.closing .mobile-nav-link:nth-child(2) { animation: mm-link-out 260ms var(--ease-smooth) 0ms   both; }
.mobile-menu.closing .mobile-nav-link:nth-child(1) { animation: mm-link-out 260ms var(--ease-smooth) 50ms  both; }
.mobile-menu.closing .mobile-nav-cta               { animation: mm-link-out 240ms var(--ease-smooth) 0ms   both; }

@keyframes mm-link-out {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(36px); }
}

/* =============================================
   RESPONSIVE
   ============================================= */

@media (max-width: 768px) {
  .site-header {
    padding: var(--space-3) var(--space-4);
  }

  .nav-links,
  .nav-cta {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .mobile-menu {
    display: flex;
  }
}