/* ============================================================
   AlgoDev Studio | Navbar System
   Premium glass navigation — TradingView inspired
   ============================================================ */

/* ============================================================
   NAV ROOT
   ============================================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  transition: background var(--t-slow), border-color var(--t-slow), box-shadow var(--t-slow);
  border-bottom: 1px solid transparent;
}

.navbar.scrolled {
  background: rgba(5, 8, 22, 0.88);
  backdrop-filter: blur(32px);
  -webkit-backdrop-filter: blur(32px);
  border-bottom-color: var(--bdr-1);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.navbar-inner {
  display: flex;
  align-items: center;
  height: 64px;
  gap: 0;
}

/* ============================================================
   LOGO
   ============================================================ */
.nav-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
  margin-right: 40px;
  transition: opacity var(--t-fast);
}

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

.nav-logo-img {
  height: 48px;
  width: auto;
  display: block;
  object-fit: contain;
}

.logo-mark {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, var(--teal) 0%, var(--blue) 100%);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 0 16px rgba(71,215,172,0.30);
}

.logo-mark svg {
  width: 20px;
  height: 20px;
  fill: #050816;
}

.logo-text-wrap {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.logo-name {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--txt-1);
}

.logo-tag {
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  margin-top: 1px;
}

/* ============================================================
   MAIN NAV LINKS
   ============================================================ */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
}

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 14px;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--txt-4);
  border-radius: var(--r-sm);
  transition: color var(--t-fast), background var(--t-fast);
  white-space: nowrap;
  cursor: pointer;
  border: none;
  background: transparent;
  font-family: var(--font);
}

.nav-link:hover,
.nav-link.active {
  color: var(--txt-1);
  background: var(--bg-glass-md);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 14px;
  right: 14px;
  height: 2px;
  background: var(--teal);
  border-radius: var(--r-full);
}

.nav-chevron {
  width: 14px;
  height: 14px;
  color: var(--txt-5);
  transition: transform var(--t-base), color var(--t-fast);
  flex-shrink: 0;
}

.nav-dropdown:hover .nav-chevron,
.nav-dropdown.open .nav-chevron {
  transform: rotate(180deg);
  color: var(--teal);
}

/* ============================================================
   DROPDOWN WRAPPER
   ============================================================ */
.nav-dropdown {
  position: relative;
}

.nav-dropdown:hover .dropdown-menu,
.nav-dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  pointer-events: all;
}

/* ============================================================
   MEGA MENU
   ============================================================ */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  padding-top: 12px;
  transform: translateX(-50%) translateY(-8px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--t-base), visibility var(--t-base), transform var(--t-base);
  z-index: 200;
}

.mega-menu {
  width: 680px;
  background: rgba(8, 13, 28, 0.96);
  backdrop-filter: blur(40px);
  -webkit-backdrop-filter: blur(40px);
  border: 1px solid var(--bdr-2);
  border-radius: var(--r-xl);
  box-shadow: 0 32px 80px rgba(0,0,0,0.6), 0 0 0 1px rgba(71,215,172,0.04);
  overflow: hidden;
  padding: 24px;
}

.mega-menu-header {
  padding: 0 0 16px 0;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--bdr-1);
}

.mega-menu-title {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
}

.mega-menu-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px;
}

.mega-menu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--r-md);
  transition: background var(--t-fast);
  text-decoration: none;
  cursor: pointer;
}

.mega-menu-item:hover {
  background: var(--bg-glass-md);
}

.mega-menu-item:hover .mega-item-label {
  color: var(--txt-1);
}

.mega-item-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--r-sm);
  background: var(--teal-dim);
  border: 1px solid var(--teal-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--teal);
  transition: background var(--t-fast);
}

.mega-menu-item:hover .mega-item-icon {
  background: rgba(71,215,172,0.18);
}

.mega-item-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--txt-3);
  transition: color var(--t-fast);
}

.mega-item-sub {
  font-size: var(--text-xs);
  color: var(--txt-5);
  margin-top: 1px;
}

.mega-menu-footer {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--bdr-1);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mega-menu-footer-text {
  font-size: var(--text-xs);
  color: var(--txt-5);
}

/* Simple dropdown */
.simple-dropdown {
  min-width: 220px;
  background: rgba(8, 13, 28, 0.96);
  backdrop-filter: blur(40px);
  -webkit-backdrop-filter: blur(40px);
  border: 1px solid var(--bdr-2);
  border-radius: var(--r-lg);
  box-shadow: 0 24px 64px rgba(0,0,0,0.5);
  overflow: hidden;
  padding: 8px;
  left: 0;
  transform: translateX(0) translateY(-8px);
}

.simple-dropdown-item {
  display: block;
  padding: 10px 14px;
  font-size: var(--text-sm);
  color: var(--txt-4);
  border-radius: var(--r-sm);
  transition: background var(--t-fast), color var(--t-fast);
  text-decoration: none;
}

.simple-dropdown-item:hover {
  background: var(--bg-glass-md);
  color: var(--txt-1);
}

/* ============================================================
   NAV ACTIONS
   ============================================================ */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
  flex-shrink: 0;
}

/* ============================================================
   MOBILE TOGGLE
   ============================================================ */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-sm);
  background: var(--bg-glass-md);
  border: 1px solid var(--bdr-1);
  cursor: pointer;
  flex-shrink: 0;
}

.mobile-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--txt-3);
  border-radius: var(--r-full);
  transition: all var(--t-base);
}

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

/* ============================================================
   MOBILE DRAWER
   ============================================================ */
.mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(5, 8, 22, 0.97);
  backdrop-filter: blur(40px);
  -webkit-backdrop-filter: blur(40px);
  z-index: calc(var(--z-nav) - 1);
  overflow-y: auto;
  padding: 24px var(--px) 40px;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity var(--t-base), transform var(--t-base);
  pointer-events: none;
}

.mobile-menu.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--txt-2);
  border-bottom: 1px solid var(--bdr-1);
  text-decoration: none;
  transition: color var(--t-fast);
}

.mobile-nav-link:hover { color: var(--teal); }

.mobile-sub-links {
  padding: 8px 0 4px 16px;
  display: none;
}

.mobile-sub-links.open { display: block; }

.mobile-sub-link {
  display: block;
  padding: 10px 0;
  font-size: var(--text-base);
  color: var(--txt-5);
  transition: color var(--t-fast);
  text-decoration: none;
}

.mobile-sub-link:hover { color: var(--teal); }

.mobile-cta {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1080px) {
  .nav-links { gap: 0; }
  .nav-link  { padding: 8px 10px; font-size: 13px; }
}

@media (max-width: 900px) {
  .nav-links,
  .nav-actions .btn:not(.mobile-toggle) { display: none; }

  .mobile-toggle { display: flex; }

  .mobile-menu { display: block; }

  .nav-actions { gap: 8px; }
}