/* ── Base & Utilities ── */
html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: hidden;
}

::selection {
  background: #0d9488;
  color: white;
}

/* ── Scroll Indicator ── */
.scroll-indicator {
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(8px); opacity: 0.5; }
}

/* ── Hero Animation ── */
.hero-tag {
  animation: fadeInUp 0.8s ease-out both;
}

/* ── Fade-in Animations ── */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ── Scroll Reveal ── */
.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; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* ── Service Cards ── */
.service-card {
  will-change: transform;
}

.service-card:hover {
  transform: translateY(-4px);
}

/* ── Navbar Transition ── */
#navbar.scrolled {
  background: rgba(2, 6, 23, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
}

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

.mobile-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: #14b8a6;
  transition: width 0.3s ease;
}

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

/* ── Form Focus States ── */
input:focus,
textarea:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

/* ── Button Ripple ── */
button, a {
  position: relative;
  overflow: visible;
}

/* ── Responsive Typography ── */
@media (max-width: 640px) {
  .font-serif {
    line-height: 1.1;
  }
}

/* ── Image Aspect Ratio Helpers ── */
img {
  max-width: 100%;
  height: auto;
}

/* ── Subtle Pattern Overlay ── */
.service-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.service-card {
  position: relative;
  overflow: hidden;
}

.service-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #0d9488, #14b8a6, #5eead4);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.service-card:hover::after {
  transform: scaleX(1);
}