/* Navigation Styles for UIU CGPA Calculator */
.navbar {
  background: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
  color: white;
  transition: transform 0.3s ease;
}

.nav-logo:hover {
  transform: scale(1.05);
}

.nav-logo-icon {
  width: 50px;
  height: 50px;
  background-color: #ff8c00;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Lexend Deca", sans-serif;
  font-size: 1.4rem;
  font-weight: 900;
  box-shadow: 0 2px 10px rgba(255, 215, 0, 0.3);
}

.nav-logo-text {
  font-family: "Lexend Deca", sans-serif;
  font-weight: 500;
  font-size: 1.5rem;
  color: white;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.2rem;
  color: #ffffff;
  text-decoration: none;
  font-family: "Lexend Deca", sans-serif;
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: 25px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.nav-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #ffd700 0%, #ffed4e 100%);
  transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: -1;
}

.nav-link:hover::before {
  left: 0;
}

.nav-link:hover {
  color: #000;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(255, 215, 0, 0.3);
}

.nav-link.active {
  background: linear-gradient(135deg, #ffd700 0%, #ffed4e 100%);
  color: #000;
  font-weight: 600;
  box-shadow: 0 4px 15px rgba(255, 215, 0, 0.4);
}

.nav-link.active::before {
  display: none;
}

.nav-icon {
  width: 18px;
  height: 18px;
  transition: transform 0.3s ease;
}

.nav-link:hover .nav-icon {
  transform: scale(1.1);
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 25px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 10;
}

.mobile-menu-btn span {
  width: 100%;
  height: 3px;
  background: #ffffff;
  border-radius: 2px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  transform-origin: center;
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

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

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-container {
    padding: 0 1rem;
  }
  
  /* .nav-logo-text {
    font-size: 1.2rem;
  }
  
  .nav-logo-icon {
    width: 35px;
    height: 35px;
    font-size: 1rem;
  } */
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding: 2rem 0;
    gap: 1rem;
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-link {
    width: 90%;
    justify-content: center;
    padding: 1rem 1.5rem;
    font-size: 1.1rem;
    border-radius: 15px;
  }
  
  .nav-link:hover {
    transform: translateY(-1px);
  }
}

@media (max-width: 480px) {
  .nav-container {
    padding: 0 0.8rem;
  }
  
  /* .nav-logo-text {
    font-size: 1.1rem;
  }
  
  .nav-logo-icon {
    width: 32px;
    height: 32px;
    font-size: 0.9rem;
  } */
  
  .nav-link {
    width: 95%;
    padding: 1.2rem 1.5rem;
    font-size: 1rem;
  }
}

/* Smooth scroll behavior */
html {
  scroll-behavior: smooth;
}