* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  line-height: 1.5;
  color: #111;
  background-color: #f5f7f9;
}

img,
iframe {
  max-width: 100%;
  height: auto;
  display: block;
}

.myclass {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 10px;
  padding: 12px 0;
}

.myclass img {
  max-height: 110px;
  width: auto;
  object-fit: contain;
}

nav {
  background-color: #111;
  padding: 10px 10px 6px;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

nav ul li {
  position: relative;
  min-width: 120px;
}

nav ul li a {
  text-decoration: none;
  color: white;
  padding: 10px 16px;
  display: block;
}

nav ul li a:hover {
  background-color: red;
  border-radius: 6px;
}

nav ul li ul {
  position: absolute;
  top: 100%;
  left: 0;
  background: #111;
  display: none;
  border-radius: 6px;
  min-width: 160px;
  z-index: 10;
}

nav ul li ul li a {
  padding: 10px 16px;
}

nav ul li:hover ul,
nav ul li:focus-within ul {
  display: block;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  padding: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.card,
.card1 {
  background-color: #2e8b8b;
  width: 100%;
  border: 1px solid #0f3c3c;
  padding: 16px;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.12);
  color: #fff;
}

.card1 iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: none;
  border-radius: 10px;
}

.card h3,
.card1 h3 {
  margin: 0.75rem 0 0.5rem;
  text-align: center;
}

.card p,
.card1 p {
  margin: 0.5rem 0;
  text-align: center;
}

.responsive-video {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: none;
  border-radius: 10px;
}

h1,
h2,
h3 {
  margin: 0.75rem 0;
}

p {
  margin: 0.5rem 0;
}

section,
footer {
  padding: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

footer p {
  margin: 0.25rem 0;
}

hr {
  border: none;
  border-top: 1px solid rgba(0, 0, 0, 0.12);
  margin: 2rem auto;
  max-width: 1200px;
}

@media (max-width: 1024px) {
  .cards {
    padding: 16px;
  }

  .myclass img {
    max-height: 90px;
  }
}

@media (max-width: 768px) {
  body {
    padding: 0 10px;
  }

  nav ul {
    flex-direction: column;
    align-items: center;
  }

  nav ul li {
    width: 100%;
    max-width: 420px;
    text-align: center;
  }

  nav ul li ul {
    position: static;
    width: 100%;
    box-shadow: none;
  }

  nav ul li:hover ul {
    display: none;
  }

  nav ul li:focus-within ul {
    display: block;
  }

  nav ul li a {
    padding: 10px 14px;
  }

  .cards {
    gap: 15px;
    padding: 14px;
  }

  .card,
  .card1 {
    padding: 14px;
  }

  section,
  footer {
    padding: 16px;
  }
}