/* ===== RESET & BASE ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
}

img {
  display: block;
  max-width: 100%;
}

/* ===== NAV ===== */
#site-nav {
  background: rgba(242, 251, 247, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(195, 234, 222, 0.4);
}

#site-nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 1px 20px rgba(13, 22, 53, 0.06);
}

/* ===== MOBILE MENU ===== */
#mobile-menu.open {
  transform: translateX(0);
}

.mobile-link {
  transition: color 0.2s, transform 0.3s;
}

.mobile-link:hover {
  color: #38a78e;
  transform: translateX(4px);
}

/* ===== MENU TABS ===== */
.menu-tab {
  color: #172761;
  background: transparent;
  cursor: pointer;
  border: none;
  font-family: 'Inter', system-ui, sans-serif;
}

.menu-tab.active {
  background: #172761;
  color: #f2fbf7;
  box-shadow: 0 4px 12px rgba(13, 22, 53, 0.2);
}

.menu-tab:not(.active):hover {
  background: #e1f5ea;
  color: #172761;
}

/* ===== SCROLL REVEAL ===== */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 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; }

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(32px);
  }
}

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

/* ===== CUSTOM SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: #f2fbf7;
}
::-webkit-scrollbar-thumb {
  background: #c3eade;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #93d5c5;
}

/* ===== SELECTION ===== */
::selection {
  background: #c3eade;
  color: #172761;
}