nav {
  position: fixed;
  top: 40px;
  left: 0;
  width: 100%;
  z-index: 1000;
}

nav .navbar {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.95);
  padding: 15px 40px;
   border-radius: 0 0 8px 8px; /* Rounded bottom corners */
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1), 
              0 5px 15px rgba(0, 0, 0, 0.07), 
              0 2px 5px rgba(0, 0, 0, 0.05); /* Multi-layer shadow */
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(10px);
  transition: var(--transition);
  transform-origin: top center;
}

nav .navbar::before {
  content: "";
  position: absolute;
  top: -3px;
  left: -1px;
  right: 0px;
  height: 10px;
  background: var(--accent-color);
  border-radius: 4px 3px 0 0;
}

nav .navbar.scrolled::before {
  left: -1px;
  right: 0px;
  top: -3px;
}

nav .navbar .nav-btn {
  display: none;
  border: none;
  outline: none;
  background: transparent;
  cursor: pointer;
  width: 40px;
  height: 40px;
  position: relative;
  z-index: 1001;
}

nav .navbar .nav-btn span {
  display: block;
  width: 25px;
  height: 2px;
  background: var(--accent-color);
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  transition: var(--transition);
}

nav .navbar .nav-btn span:nth-child(1) {
  top: 12px;
}

nav .navbar .nav-btn span:nth-child(2) {
  top: 19px;
}

nav .navbar .nav-btn span:nth-child(3) {
  top: 26px;
}

nav .navbar .nav-btn.active span:nth-child(1) {
  top: 19px;
  transform: translateX(-50%) rotate(45deg);
}

nav .navbar .nav-btn.active span:nth-child(2) {
  opacity: 0;
}

nav .navbar .nav-btn.active span:nth-child(3) {
  top: 19px;
  transform: translateX(-50%) rotate(-45deg);
}

nav .navbar .logo {
  display: flex;
  align-items: center;
  height: 122px;
  transition: var(--transition);
}

nav .navbar .logo img {
  height: 100%;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 2px 5px rgba(0,0,0,0.1));
  transition: var(--transition);
}

nav .navbar.scrolled .logo {
  height: 96px;
}

nav .navbar .logo:hover img {
  transform: translateY(-4px);
  filter: drop-shadow(0 4px 8px rgba(5, 1, 59, 0.15));
}

nav .navbar .main-menu {
  display: flex;
  align-items: center;
  gap: 10px;
}

nav .navbar .main-menu li {
  list-style: none;
  position: relative;
}

nav .navbar .main-menu li a {
  display: block;
  font-size: 16px;
  font-weight: 500;
  color: var(--dark-gray);
  padding: 10px 15px;
  position: relative;
  transition: var(--transition);
}

nav .navbar .main-menu li a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 15px;
  width: calc(100% - 30px);
  height: 2px;
  background: var(--accent-color);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

nav .navbar .main-menu li a:hover {
  color: var(--accent-colorr);
}

nav .navbar .main-menu li a:hover::before {
  transform: scaleX(1);
  transform-origin: left;
}

nav .navbar .btn {
  border: none;
  outline: none;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 600;
  color: white;
  background: var(--accent-color);
  padding: 12px 28px;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(106, 205, 255, 0.3);
  position: relative;
  overflow: hidden;
}

nav .navbar .btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(4, 78, 109, 0.308), transparent);
  transition: 0.5s;
}

nav .navbar .btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px black;
}

nav .navbar .btn:hover::before {
  left: 100%;
}

.btn-mobile {
  display: none;
  width: 100%;
  text-align: center;
}

@media (max-width: 992px) {
  nav .navbar {
    padding: 20px 25px;
  }
  
  nav .navbar::before {
    left: -1px;
    right: 0px;
    border-radius: 4px 3px 0 0;
  }
  
  nav .navbar.scrolled {
    padding: 10px 20px;
  }
  
  nav .navbar.scrolled::before {
    left: -1px;
    right: 0px;
  }
  
  .btn {
    display: none;
  }
  
  .btn-mobile {
    display: block;
    margin-top: 20px;
  }
  
  nav .navbar .nav-btn {
    display: block;
  }
  
  nav .navbar .main-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 88vh;
    padding: 100px 40px 40px;
    background: rgba(255, 255, 255, 0.98);
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    gap: 20px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 10px 10px 15px 15px;
  }
  
  nav .navbar .main-menu li {
    width: 100%;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
  }
  
  nav .navbar .main-menu li:nth-child(1) {
    transition-delay: 0.1s;
  }
  
  nav .navbar .main-menu li:nth-child(2) {
    transition-delay: 0.15s;
  }
  
  nav .navbar .main-menu li:nth-child(3) {
    transition-delay: 0.2s;
  }
  
  nav .navbar .main-menu li:nth-child(4) {
    transition-delay: 0.25s;
  }
  
  nav .navbar .main-menu li:nth-child(5) {
    transition-delay: 0.3s;
  }
  
  nav .navbar .main-menu.active {
    opacity: 1;
    visibility: visible;
  }
  
  nav .navbar .main-menu.active li {
    opacity: 1;
    transform: translateY(0);
  }
  
  nav .navbar .main-menu li a {
    font-size: 18px;
    padding: 15px 0;
  }
  
  nav .navbar .main-menu li a::before {
    left: 0;
    width: 50px;
  }
  
  nav .navbar .logo {
    height: 90px;
  }
}