.main-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #333;
  color: #fff;
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: background-color 0.3s ease, box-shadow 0.3s ease-in-out;
}

.main-nav.scrolled {
  background-color: #333;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  transition: background-color 0.3s ease, box-shadow 0.3s ease-in-out;
}

.main-nav .logo a {
  font-size: 1.8rem;
  font-weight: bold;
  text-decoration: none;
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(
    45deg,
    #ffffff,
    #ffffff 33%,
    #f9f9f9,
    #00bfff 66%,
    #e67e22,
    #e67e22 100%
  );
  background-size: 400%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
  transition: transform 0.3s ease, filter 0.3s ease;
}

.main-nav .logo a:hover {
  animation: gradientMoveLong 20s linear 1; 
  transform: scale(1.1);
  filter: drop-shadow(0 0 10px rgba(255, 152, 0, 0.8)); 
}

@keyframes gradientMoveLong {
  0% {
    background-position: 0%;
  }
  25% {
    background-position: 100%;
    filter: brightness(1.2);
  }
  50% {
    background-position: 200%;
    filter: rotate(90deg);
  }
  75% {
    background-position: 300%;
    filter: brightness(0.9);
  }
  100% {
    background-position: 400%;
    filter: brightness(1);
  }
}

.main-nav.scrolled .logo a {
  background: linear-gradient(45deg, #ffd60a, #ffd60a);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
  transition: transform 0.4s ease, opacity 0.4s ease, visibility 0.4s;
}

.nav-menu li a {
  color: #fff;
  text-decoration: none;
  font-size: 1.3rem;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  transition: color 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
}

.nav-menu li a:hover {
  color: #00bfff;
  font-weight: 600;
  background-color: rgba(255, 255, 255, 0.1);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.main-nav.scrolled .nav-menu li a {
  color: #f1f1f1;
}

.main-nav.scrolled .nav-menu li a:hover {
  color: #ff9800;
  background-color: transparent;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 2rem;
  color: #f8f8f8;
  cursor: pointer;
  transition: transform 0.4s ease, color 0.3s ease;
}

.nav-toggle:focus {
  outline: none;
}

.nav-toggle.active {
  transform: rotate(90deg);
  color: #ff9800; 
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    flex-direction: column;
    gap: 1rem;
    background-color: #444;
    position: absolute;
    top: 100%;
    right: 0;
    width: 100%;
    text-align: center;
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out, visibility 0.3s;
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-menu li a {
    width: 100%;
    padding: 1rem;
  }

  .nav-toggle {
    display: block;
    margin-right: 1rem;
  }
}