html {
  scroll-behavior: smooth;
}

.section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
  scroll-margin-top: 100px;
}

.divider {
  width: 60px;
  height: 3px;
  background: #1b4ef0;
  margin: 0 auto 50px;
  border-radius: 3px;
}

.h2-greeting {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 30px;
  color: #1b1b1b;
}

@keyframes fadeExpand {
  0% {
    opacity: 0;
    transform: scale(0.95) translateY(20px);
  }

  100% {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@keyframes slideUp {
  0% {
    opacity: 0;
    transform: translateY(30px);
  }

  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes flowingGradient {
  0% {
    background-position: 0% 50%;
  }

  50% {
    background-position: 100% 50%;
  }

  100% {
    background-position: 0% 50%;
  }
}

.intro-header {
  padding: 50px 20px;

  text-align: center;
  max-width: 1200px;
  margin: 0 auto;
  background-color: #283954;
}

.intro-header.fade-expand {
  animation: fadeExpand 1s ease-out forwards;
}

.intro-title {
  position: relative;
  display: inline-block;
  margin-bottom: 24px;
  animation: slideUp 0.8s ease-out 0.2s backwards;
}

.intro-title h2 {
  font-size: 3rem;
  font-weight: 700;
  color: white;
  letter-spacing: -0.02em;
  margin: 0;
  position: relative;
  padding-bottom: 16px;
}

.intro-title h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 4px;
  background: linear-gradient(90deg,
      #ffffff,
      #3b82f6,
      #2563eb,
      #ffffff,
      #2563eb,
      #3b82f6,
      #ffffff);
  background-size: 200% 100%;
  border-radius: 2px;
  animation: flowingGradient 3s ease-in-out infinite;
}

.intro-subtitle {
  font-size: 1.25rem;
  color: white;
  line-height: 1.8;
  max-width: 700px;
  margin: 0 auto;
  font-weight: 400;
  animation: slideUp 0.8s ease-out 0.4s backwards;
}

/* Responsive Design */
@media (max-width: 768px) {
  .intro-header {
    padding: 60px 20px;
  }

  .intro-title h2 {
    font-size: 2rem;
  }

  .intro-subtitle {
    font-size: 1.125rem;
  }
}

@media (max-width: 480px) {
  .intro-header {
    padding: 40px 16px;
  }

  .intro-title h2 {
    font-size: 1.75rem;
  }

  .intro-subtitle {
    font-size: 1rem;
  }
}