body {
  margin: 0;
  font-family: Arial, sans-serif;
}

header {
  -webkit-backdrop-filter: blur(5px);
  padding: 20px;
  width: 100vw;
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  backdrop-filter: blur(5px);
  transition: background-color 0.5s ease, color 0.3s ease;

}

.logo {
  font-weight: bold;
  font-size: 1.7rem;
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease-in-out;

}
.black {
  background-color: black;
}
nav {
  font-weight: bold;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: white;
  position: sticky;
  top: 0;
  width: 82vw;
  margin: 0 auto;
}

header nav ul li {
  margin: 0 10px;
}

nav ul {
  display: flex;
}

nav ul li {
  list-style: none;
}

nav ul li a {
  color: inherit;
  text-decoration: none;
  display: block;
  padding: 0.5rem;
  margin: 0 0.8rem;
  border-radius: 0.5rem;
  transition: color 0.3s ease-in-out;
}


nav ul li a:hover,.logo:hover {
  color: var(--first-color);
  transition: color 0.3s ease-in-out;
}

.nav-links {
  display: flex;
}

.nav-btn {
  display: none;
}

nav ul li a.nav-active {
  color: var(--first-color);
}

.nav-btn label {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 21px;
  cursor: pointer;
  margin-right: 20px;
  position: relative;
}

.nav-btn label span {
  display: block;
  height: 3px;
  width: 100%;
  background-color: #fff;
  border-radius: 2px;
  transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
}

.nav-check:not(:checked) ~ .nav-btn label span:nth-child(1) {
  transform: translateY(0) rotate(0);
}

.nav-check:not(:checked) ~ .nav-btn label span:nth-child(2) {
  opacity: 1;
}

.nav-check:not(:checked) ~ .nav-btn label span:nth-child(3) {
  transform: translateY(0) rotate(0);
}

.nav-check:checked ~ .nav-btn label span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.nav-check:checked ~ .nav-btn label span:nth-child(2) {
  opacity: 0;
}

.nav-check:checked ~ .nav-btn label span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

.nav-check {
  display: none;
}

.nav-check:checked ~ .nav-links {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  position: absolute;
  top: 100%;
  right: 0;
  width: 100%;
  text-align: right;
  background: rgba(0, 0, 0, 0.9);
  animation: fade-in 0.5s forwards;
}

.nav-check:checked ~ .nav-links li {
  margin: 10px 0;
}

.nav-check:checked ~ .nav-links li a {
  padding: 10px 20px;
  margin: 0;
  width: 100%;
  box-sizing: border-box;
  opacity: 0;
  animation: slide-in 0.5s forwards;
}

.nav-check:checked ~ .nav-links li:nth-child(1) a {
  animation-delay: 0.1s;
}

.nav-check:checked ~ .nav-links li:nth-child(2) a {
  animation-delay: 0.2s;
}

.nav-check:checked ~ .nav-links li:nth-child(3) a {
  animation-delay: 0.3s;
}

.nav-check:checked ~ .nav-links li:nth-child(4) a {
  animation-delay: 0.4s;
}

.nav-check:checked ~ .nav-links li:nth-child(5) a {
  animation-delay: 0.5s;
}