/* Base & Typography */
html {
  scroll-behavior: smooth;
}

body {
  overflow-x: hidden;
}

::selection {
  background: rgba(94, 234, 212, 0.3);
  color: #fff;
}

/* Navbar */
#navbar {
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
}

#navbar.scrolled {
  background: rgba(10, 22, 40, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-link {
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: #5eead4;
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

/* Mobile menu */
.mobile-link {
  position: relative;
}

/* Hero */
#hero {
  position: relative;
}

#hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(10, 22, 40, 0.97) 0%, rgba(15, 33, 64, 0.85) 50%, rgba(10, 22, 40, 0.7) 100%);
  z-index: 1;
}

#hero > * {
  position: relative;
  z-index: 2;
}

/* Menu tabs */
.menu-tab {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: all 0.3s ease;
}

.menu-tab:hover {
  border-color: rgba(94, 234, 212, 0.4);
  color: rgba(255, 255, 255, 0.8);
}

.menu-tab.active {
  background: #5eead4;
  border-color: #5eead4;
  color: #0a1628;
}

.menu-tab.active:hover {
  background: #3dd9c1;
  border-color: #3dd9c1;
}

/* Scroll animations */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* Image hover */
.rounded-2xl.overflow-hidden {
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Form inputs */
input:focus,
textarea:focus {
  background: rgba(255, 255, 255, 0.07);
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: #0a1628;
}

::-webkit-scrollbar-thumb {
  background: rgba(94, 234, 212, 0.3);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(94, 234, 212, 0.5);
}

/* Responsive */
@media (max-width: 768px) {
  .font-serif {
    line-height: 1.1;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  * {
    transition-duration: 0.01ms !important;
  }
}