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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  min-height: 100vh;
}

/* ========== SCROLL REVEAL (progressive enhancement) ========== */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(30px);
    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; }
}

/* ========== GEOMETRIC ACCENTS ========== */
.geo-dots::before {
  content: '';
  position: absolute;
  width: 60px;
  height: 60px;
  background-image: radial-gradient(circle, currentColor 1px, transparent 1px);
  background-size: 8px 8px;
  opacity: 0.15;
}

/* ========== NAV HAMBURGER ANIMATION ========== */
#menu-btn.active svg {
  transform: rotate(90deg);
}

/* ========== MOBILE MENU TRANSITION ========== */
#mobile-menu {
  animation: slideDown 0.25s ease-out;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ========== CUSTOM SCROLLBAR ========== */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: #f1f5f9;
}
::-webkit-scrollbar-thumb {
  background: #94a3b8;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #64748b;
}

/* ========== FOCUS STYLES ========== */
a:focus-visible, button:focus-visible {
  outline: 2px solid #0d9488;
  outline-offset: 2px;
  border-radius: 4px;
}

/* ========== SELECTION ========== */
::selection {
  background: #0d9488;
  color: white;
}