/* ===================================================
   LIQUID GLASS NAVIGATION BAR (RESPONSIVE & DUAL-THEME)
   =================================================== */

.nav {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  z-index: 100;
  padding: 16px 0;
  transition: padding 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Dynamic scroll compression */
.nav.scrolled {
  padding: 10px 0;
}

.nav.scrolled .nav-inner {
  padding: 7px 18px;
  backdrop-filter: blur(36px) saturate(220%);
  -webkit-backdrop-filter: blur(36px) saturate(220%);
  box-shadow: 
    0 24px 48px -12px rgba(15, 23, 42, 0.12),
    0 4px 16px -2px rgba(37, 99, 235, 0.08),
    inset 0 1.5px 1px 0 rgba(255, 255, 255, 1),
    inset 0 -1.5px 2px 0 rgba(37, 99, 235, 0.08);
}

html.dark .nav.scrolled .nav-inner {
  box-shadow: 
    0 28px 56px -14px rgba(0, 0, 0, 0.9),
    0 0 28px -2px rgba(56, 189, 248, 0.18),
    inset 0 1.5px 1px 0 rgba(255, 255, 255, 0.35),
    inset 0 -1.5px 2px 0 rgba(56, 189, 248, 0.25);
}

/* Floating Liquid Glass Island */
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  background: var(--glass-panel);
  backdrop-filter: blur(28px) saturate(210%);
  -webkit-backdrop-filter: blur(28px) saturate(210%);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  padding: 9px 20px;
  box-shadow: var(--glass-shadow);
  position: relative;
  overflow: hidden;
  transition: padding 0.35s cubic-bezier(0.16, 1, 0.3, 1), background 0.35s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.35s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Top Specular Razor Edge */
.nav-inner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  right: 20px;
  height: 1.5px;
  background: linear-gradient(90deg, transparent 0%, var(--glass-specular) 50%, transparent 100%);
  pointer-events: none;
  z-index: 2;
}

/* Bottom Caustic Refraction */
.nav-inner::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 36px;
  right: 36px;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--glass-refract) 50%, transparent 100%);
  pointer-events: none;
}

/* Interactive Cursor Spotlight on Nav */
.nav-spotlight {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(160px circle at var(--nx, 50%) var(--ny, 50%), var(--spotlight-glow), transparent 70%);
  transition: opacity 0.35s ease;
  z-index: 1;
}

.nav-inner:hover .nav-spotlight {
  opacity: 1;
}

/* Brand Logo & Glass Bead */
.brand {
  font-weight: 800;
  letter-spacing: -0.04em;
  font-size: 19px;
  display: flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
  color: var(--text);
  z-index: 2;
  user-select: none;
}

.brand-bead {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--btn-primary-bg);
  border: 1px solid var(--btn-primary-border);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  box-shadow: 0 4px 14px var(--accent-glow), inset 0 1px 1px rgba(255, 255, 255, 0.7);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.brand:hover .brand-bead {
  transform: scale(1.1) rotate(6deg);
}

.brand span.dot {
  color: var(--accent-2);
  display: inline-block;
  transition: transform 0.3s ease;
}

.brand:hover .dot {
  transform: scale(1.3);
}

/* Desktop Links Pill */
.nav-links {
  display: flex;
  align-items: center;
  gap: 5px;
  background: rgba(255, 255, 255, 0.45);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 4px;
  border-radius: 999px;
  z-index: 2;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.04);
}

html.dark .nav-links {
  background: rgba(255, 255, 255, 0.04);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.4);
}

.nav-links a {
  padding: 7px 18px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 13.5px;
  font-weight: 600;
  text-decoration: none;
  transition: color 0.25s cubic-bezier(0.16, 1, 0.3, 1), background 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

html.dark .nav-links a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
}

.nav-links a.active {
  color: var(--pill-text);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 12px rgba(37, 99, 235, 0.14);
}

html.dark .nav-links a.active {
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.3);
  box-shadow: 0 0 14px rgba(56, 189, 248, 0.2);
}

/* Right Navigation Section */
.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 2;
}

/* Liquid Glass Theme Switcher Pill */
.theme-toggle-btn {
  width: 54px;
  height: 30px;
  border-radius: 999px;
  background: var(--pill-bg);
  border: 1px solid var(--pill-border);
  position: relative;
  cursor: pointer;
  display: flex;
  align-items: center;
  padding: 3px;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1), background 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.08);
}

.theme-toggle-btn:hover {
  border-color: var(--glass-border-hover);
  box-shadow: 0 0 16px var(--accent-glow);
  transform: scale(1.04);
}

.theme-toggle-btn:active {
  transform: scale(0.96);
}

.theme-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--btn-primary-bg);
  box-shadow: 0 2px 10px var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  color: #fff;
}

.theme-thumb svg {
  width: 12px;
  height: 12px;
  stroke-width: 2.2;
}

html.dark .theme-thumb {
  transform: translateX(24px);
}

/* Desktop Call To Action */
.nav-cta {
  border: 1px solid var(--btn-primary-border) !important;
  color: #fff !important;
  background: var(--btn-primary-bg) !important;
  box-shadow: var(--btn-primary-shadow);
  padding: 8px 18px !important;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
}

.nav-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.28), transparent);
  transition: left 0.6s ease;
  pointer-events: none;
}

.nav-cta:hover::before {
  left: 100%;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px -2px var(--accent-glow);
}

.nav-cta:active {
  transform: translateY(0px) scale(0.97);
}

/* Mobile Hamburger Button */
.mobile-menu-btn {
  display: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
  padding: 0;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s cubic-bezier(0.16, 1, 0.3, 1), background 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

html.dark .mobile-menu-btn {
  background: rgba(255, 255, 255, 0.07);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.mobile-menu-btn:hover {
  border-color: var(--glass-border-hover);
  transform: scale(1.05);
}

.mobile-menu-btn:active {
  transform: scale(0.95);
}

.mobile-menu-btn span {
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  transform-origin: center;
}

/* Hamburger Morph into 'X' */
.mobile-menu-btn.open span:nth-child(1),
.mobile-menu-btn.active span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.mobile-menu-btn.open span:nth-child(2),
.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.mobile-menu-btn.open span:nth-child(3),
.mobile-menu-btn.active span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Mobile Floating Liquid Drawer */
.mobile-drawer {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  right: 0;
  background: var(--glass-panel);
  backdrop-filter: blur(36px) saturate(220%);
  -webkit-backdrop-filter: blur(36px) saturate(220%);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 12px;
  box-shadow: 
    0 24px 50px -10px rgba(0, 0, 0, 0.25),
    0 0 30px var(--spotlight-glow),
    inset 0 1.5px 1px 0 rgba(255, 255, 255, 0.7);
  display: flex;
  flex-direction: column;
  gap: 6px;
  opacity: 0;
  transform: translateY(-12px) scale(0.98);
  pointer-events: none;
  visibility: hidden;
  transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              visibility 0.3s;
  z-index: 99;
}

html.dark .mobile-drawer {
  box-shadow: 
    0 30px 65px -12px rgba(0, 0, 0, 0.9),
    0 0 32px rgba(56, 189, 248, 0.2),
    inset 0 1.5px 1px 0 rgba(255, 255, 255, 0.25);
}

.mobile-drawer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  right: 20px;
  height: 1.5px;
  background: linear-gradient(90deg, transparent, var(--glass-specular), transparent);
  pointer-events: none;
}

.mobile-drawer.open,
.mobile-drawer.active {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
  visibility: visible;
}

.mobile-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  border-radius: 14px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), background 0.2s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  background: rgba(255, 255, 255, 0.25);
  border: 1px solid transparent;
}

html.dark .mobile-link {
  background: rgba(255, 255, 255, 0.04);
}

.mobile-link:hover {
  background: rgba(255, 255, 255, 0.75);
  border-color: var(--glass-border);
  transform: translateX(4px);
}

html.dark .mobile-link:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(56, 189, 248, 0.3);
}

.mobile-link-cta {
  background: var(--btn-primary-bg) !important;
  color: #fff !important;
  border: 1px solid var(--btn-primary-border) !important;
  box-shadow: var(--btn-primary-shadow);
  font-weight: 700;
  margin-top: 4px;
}

.mobile-link-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px -2px var(--accent-glow);
}

/* Language Switcher Capsule */
.lang-switch-capsule {
  display: inline-flex;
  align-items: center;
  background: var(--pill-bg);
  border: 1px solid var(--pill-border);
  border-radius: 999px;
  padding: 2px;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.06);
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.lang-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 11.5px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.25s cubic-bezier(0.16, 1, 0.3, 1), color 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  letter-spacing: 0.02em;
  line-height: 1;
}

.lang-btn:hover {
  color: var(--text);
}

.lang-btn.active {
  background: var(--btn-primary-bg);
  color: #fff;
  box-shadow: 0 2px 8px var(--accent-glow);
}

/* RTL Adjustments for Navbar */
html[dir="rtl"] .brand {
  letter-spacing: normal;
}

html[dir="rtl"].dark .theme-thumb {
  transform: translateX(-24px);
}

html[dir="rtl"] .mobile-drawer .mobile-link:hover {
  transform: translateX(-4px);
}

/* Responsive Breakpoints */
@media (max-width: 860px) {
  .nav-links {
    display: none;
  }
  .nav-cta {
    display: none;
  }
  .mobile-menu-btn {
    display: flex;
  }
}

@media (max-width: 768px), (pointer: coarse) {
  .nav-inner, .nav.scrolled .nav-inner, .mobile-drawer {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  .nav-spotlight { display: none; }
}