:root {
  --nav-bg: rgba(8, 8, 8, 0.55);
  --nav-border: rgba(255, 255, 255, 0.07);
  --nav-blur: blur(24px) saturate(180%);
  --nav-radius: 20px;
  --nav-h: 62px;
  --nav-shadow: 0 8px 40px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255,255,255,0.04);
  --nav-shadow-scrolled: 0 16px 60px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(139,92,246,0.12);
  --purple: #8b5cf6;
  --purple-dim: rgba(139, 92, 246, 0.18);
  --purple-glow: rgba(139, 92, 246, 0.35);
  --link-color: #a1a1aa;
  --link-hover: #ffffff;
  --font-display: 'Outfit', sans-serif;
  --font-body: 'Space Grotesk', sans-serif;
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

#app-nav {
  position: fixed;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  width: min(92%, 1180px);
  z-index: 900;
  transition: top 0.4s var(--ease-smooth), width 0.4s var(--ease-smooth), opacity 0.3s ease;
  animation: nav-enter 0.7s var(--ease-spring) forwards;
  opacity: 0;
}

@keyframes nav-enter {
  from { opacity: 0; transform: translateX(-50%) translateY(-20px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

#app-nav.scrolled {
  top: 10px;
  width: min(88%, 1120px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
  padding: 0 1.5rem;
  background: var(--nav-bg);
  backdrop-filter: var(--nav-blur);
  -webkit-backdrop-filter: var(--nav-blur);
  border: 1px solid var(--nav-border);
  border-radius: var(--nav-radius);
  box-shadow: var(--nav-shadow);
  transition: box-shadow 0.4s ease, background 0.4s ease, border-color 0.4s ease;
  position: relative;
  overflow: hidden;
}

#app-nav.scrolled .nav-inner {
  box-shadow: var(--nav-shadow-scrolled);
  background: rgba(8, 8, 8, 0.75);
  border-color: rgba(139, 92, 246, 0.1);
}

.nav-inner::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(139,92,246,0.04) 0%, transparent 60%);
  pointer-events: none;
}

.nav-inner::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(139,92,246,0.5), transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}

#app-nav.scrolled .nav-inner::after { opacity: 1; }

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: #fff;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  flex-shrink: 0;
  transition: opacity 0.2s ease;
}

.nav-logo img {
  transition: transform 0.4s var(--ease-spring);
}

.nav-logo:hover img { transform: rotate(15deg) scale(1.1); }
.nav-logo:hover { opacity: 0.85; }

.nav-links-desktop {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.85rem;
  color: var(--link-color);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 10px;
  transition: color 0.25s ease, background 0.25s ease;
  white-space: nowrap;
}

.nav-link i {
  font-size: 0.85rem;
  opacity: 0.7;
  transition: opacity 0.25s ease, transform 0.3s var(--ease-spring);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px; left: 50%; right: 50%;
  height: 2px;
  background: var(--purple);
  border-radius: 99px;
  transition: left 0.3s var(--ease-spring), right 0.3s var(--ease-spring);
  box-shadow: 0 0 8px var(--purple-glow);
}

.nav-link:hover,
.nav-link.active {
  color: var(--link-hover);
  background: rgba(255,255,255,0.04);
}

.nav-link:hover i,
.nav-link.active i {
  opacity: 1;
  transform: translateY(-1px);
}

.nav-link:hover::after,
.nav-link.active::after {
  left: 10px;
  right: 10px;
}

.nav-link.active {
  color: #d8b4fe;
  background: var(--purple-dim);
}

.nav-link.active i { color: var(--purple); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.nav-logout-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.1rem;
  background: var(--purple);
  color: #fff;
  border: none;
  border-radius: 12px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.4);
  transition: transform 0.3s var(--ease-spring), box-shadow 0.3s ease, background 0.3s ease;
  position: relative;
  overflow: hidden;
}

.nav-logout-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.nav-logout-btn:hover::before { opacity: 1; }
.nav-logout-btn:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 32px rgba(139,92,246,0.55);
}

.nav-logout-btn:active { transform: translateY(0) scale(0.98); }

.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  cursor: pointer;
  padding: 0;
  transition: background 0.25s ease, border-color 0.25s ease;
  flex-shrink: 0;
}

.nav-burger:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.15);
}

.nav-burger span {
  display: block;
  width: 18px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transform-origin: center;
  transition: transform 0.35s var(--ease-spring), opacity 0.25s ease, width 0.3s ease;
}

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

.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  z-index: 800;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.nav-overlay.open {
  opacity: 1;
  visibility: visible;
}

.nav-drawer {
  position: fixed;
  top: 0; right: 0;
  width: 300px;
  max-width: 85vw;
  height: 100dvh;
  background: rgba(8, 8, 8, 0.92);
  backdrop-filter: blur(32px) saturate(180%);
  -webkit-backdrop-filter: blur(32px) saturate(180%);
  border-left: 1px solid rgba(255,255,255,0.07);
  box-shadow: -20px 0 60px rgba(0,0,0,0.6), inset 1px 0 0 rgba(139,92,246,0.1);
  z-index: 850;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.45s var(--ease-spring);
  overflow-y: auto;
  overflow-x: hidden;
}

.nav-drawer.open { transform: translateX(0); }

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.drawer-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 9px;
  color: #a1a1aa;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, transform 0.3s var(--ease-spring);
}

.drawer-close:hover {
  background: rgba(255,255,255,0.1);
  color: #fff;
  transform: rotate(90deg);
}

.drawer-links {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1.25rem 1rem;
  flex: 1;
}

.drawer-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem 1rem;
  color: #a1a1aa;
  text-decoration: none;
  font-size: 0.975rem;
  font-weight: 500;
  border-radius: 12px;
  border: 1px solid transparent;
  transition: all 0.25s ease;
  transform: translateX(0);
}

.drawer-link i {
  font-size: 1rem;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
  opacity: 0.6;
  transition: opacity 0.25s ease, color 0.25s ease;
}

.drawer-link:hover {
  color: #fff;
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.06);
  transform: translateX(4px);
}

.drawer-link:hover i { opacity: 1; color: var(--purple); }

.drawer-link.active {
  color: #d8b4fe;
  background: var(--purple-dim);
  border-color: rgba(139,92,246,0.2);
}

.drawer-link.active i { opacity: 1; color: var(--purple); }

.drawer-logout {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  margin: 1rem 1.25rem 1.5rem;
  padding: 0.85rem 1rem;
  background: var(--purple);
  color: #fff;
  border: none;
  border-radius: 14px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 4px 24px rgba(139,92,246,0.4);
  transition: transform 0.3s var(--ease-spring), box-shadow 0.3s ease;
}

.drawer-logout:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 36px rgba(139,92,246,0.55);
}

.nav-drawer.open .drawer-link {
  animation: slide-in 0.4s var(--ease-spring) both;
}

.nav-drawer.open .drawer-link:nth-child(1) { animation-delay: 0.05s; }
.nav-drawer.open .drawer-link:nth-child(2) { animation-delay: 0.10s; }
.nav-drawer.open .drawer-link:nth-child(3) { animation-delay: 0.15s; }
.nav-drawer.open .drawer-link:nth-child(4) { animation-delay: 0.20s; }
.nav-drawer.open .drawer-link:nth-child(5) { animation-delay: 0.25s; }
.nav-drawer.open .drawer-link:nth-child(6) { animation-delay: 0.30s; }

@keyframes slide-in {
  from { opacity: 0; transform: translateX(24px); }
  to   { opacity: 1; transform: translateX(0); }
}

@media (max-width: 900px) {
  .nav-links-desktop { display: none; }
  .nav-logout-btn span { display: none; }
  .nav-logout-btn { padding: 0.5rem 0.85rem; }
  .nav-burger { display: flex; }
}

@media (max-width: 480px) {
  #app-nav {
    top: 10px;
    width: 94%;
  }

  .nav-inner {
    height: 56px;
    padding: 0 1rem;
    border-radius: 16px;
  }

  .nav-logo { font-size: 1.05rem; }
  .nav-logout-btn { display: none; }
}