header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 70px;
  z-index: 1000;
  background: rgba(24, 25, 28, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #00d9f6;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

nav {
  height: 100%;
  width: 100%;
}

nav ul {
  width: 100%;
  height: 100%;
  list-style: none;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  margin: 0;
  padding: 0;
}

nav li {
  height: 100%;
  display: flex;
  align-items: center;
}

nav li.logo-container {
  margin-right: auto;
  padding-left: 1.5rem;
}

#site-name {
  font-size: 1.8rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 3px;
  background: linear-gradient(135deg, #ffffff 30%, #00d9f6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 20px rgba(0, 217, 246, 0.3);
  cursor: pointer;
  transition: transform 0.3s ease, text-shadow 0.3s ease;
  margin: 0;
  padding: 5px;
  border: #00d9f6 1px solid;
  border-radius: 15px;
}

#site-name:hover {
  transform: scale(1.02);
  text-shadow: 0 0 30px rgba(0, 217, 246, 0.6);
}

nav > ul > li > a {
  position: relative;
  height: 100%;
  padding: 0 1.5rem;
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ebebeb;
  font-weight: 600;
  transition: color 0.3s ease;
  font-size: 1rem;
}

nav > ul > li > a > span {
  position: absolute;
  left: 1.5rem;
  right: 1.5rem;
  bottom: 0;
  height: 3px;
  background-color: #00d9f6;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.3s ease;
  box-shadow: 0 0 10px #00d9f6;
}

nav a:hover {
  color: #00d9f6;
  text-shadow: 0 0 8px rgba(0, 217, 246, 0.4);
}

nav a:not(.active):hover span {
  transform: scaleX(1);
}

.active {
  color: #00d9f6;
  text-shadow: 0 0 8px rgba(0, 217, 246, 0.4);
  transform: scaleX(1.02);
}

.sidebar {
  position: fixed;
  top: 0;
  right: 0;
  height: 100vh;
  width: 320px;
  z-index: 999;
  background-color: rgba(31, 33, 37, 0.98);
  backdrop-filter: blur(15px);
  border-left: 1px solid #383c44;
  box-shadow: -10px 0 50px rgba(0, 0, 0, 0.8);
  display: none;
  flex-direction: column;
  justify-content: flex-start;
  padding-top: 0;
}

.sidebar li {
  width: 100%;
  height: auto;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.sidebar .close-btn {
  height: 80px;
  display: flex;
  justify-content: flex-end;
  padding-right: 2rem;
  border-bottom: 1px solid #00d9f6;
  background: rgba(0, 0, 0, 0.2);
}

.sidebar .close-btn img {
  width: 30px;
  height: 30px;
  transition: transform 0.3s;
}

.sidebar .close-btn a:hover img {
  transform: rotate(90deg);
}

.sidebar .sidebar-logo {
  padding: 2rem;
  font-size: 1rem;
  color: #5d6066;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  pointer-events: none;
  border-bottom: none;
}

.sidebar a {
  width: 100%;
  padding: 1.5rem 2.5rem;
  justify-content: flex-start;
  font-size: 1.2rem;
  color: #ebebeb;
  transition: all 0.3s ease;
}

.sidebar a:hover {
  background: linear-gradient(90deg, rgba(0, 217, 246, 0.1), transparent);
  color: #00d9f6;
  padding-left: 3rem;
  border-left: 4px solid #00d9f6;
}

.menu-button {
  padding-right: 1.5rem;
  cursor: pointer;
  display: none;
}