* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  text-decoration: none;
  list-style: none;
  font-family: 'Poppins', sans-serif;
  scroll-behavior: smooth;
}

body {
  background-color: black;
    color: white;
  text-align: center;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}


.logo img {
  width: 120px;
  display: block;
  margin: 100px auto;
  
}


nav ul {
  display: flex;
  justify-content: center;
  gap: 20px;
  padding: 10px;
  background: black;
  width: 100%;
}

nav ul li a {
  color: red;
  font-size: 18px;
  font-weight: bold;
}


@media (max-width: 768px) {
  nav ul {
      flex-direction: column;
      gap: 10px;
  }
}


.landing-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 20px;
}

.landing-page h1 {
  font-size: 40px;
  margin-bottom: 20px;
}

.landing-page iframe {
  width: 90%;
  max-width: 800px;
  height: 400px;
}


footer {
  margin-top: 50px;
  padding: 20px;
  background: grey;
  width: 100%;
  text-align: center;
}


.H, .D, .S {
  margin-right: 15px; 
  display: inline-block;
  position: relative;
  padding: 5px;
  
}


.H::after, .D::after, .S::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  padding: 5px 1px;
  background-color: #aaa;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  width: 100%;
  transition: width 0.3s ease;
}


.H:hover::after {
  width: 125%; 
}

.D:hover::after {
  width: 125%;  
}

.S:hover::after {
  width: 125%; 
}