* {
  box-sizing: border-box;
}

.headerMobile {
  display: none;
}

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  width: 100%;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(115deg, rgba(0,0,0,0.96), rgba(105,0,128,0.92), rgba(0,0,0,0.96));
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.brand {
  font-family: 'Inter', Arial, sans-serif;
  font-weight: 800;
  color: #9efcff;
  letter-spacing: 0.04em;
}

.header ul {
  display: flex;
  gap: 1.2rem;
  list-style: none;
}

.header a {
  color: #8ff6ff;
  text-decoration: none;
  font-family: 'Inter', Arial, sans-serif;
  font-weight: 600;
  transition: color 0.25s ease, transform 0.25s ease;
}

.header a:hover {
  color: #ffffff;
  transform: translateY(-1px);
}

.menu-button,
.close-button {
  font-size: 2rem;
  color: #8ff6ff;
  background: none;
  border: none;
}

.menu {
  display: none;
}

.menu-active {
  display: flex;
  flex-direction: column;
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100vh;
  background: linear-gradient(160deg, rgba(0,0,0,0.98), rgba(105,0,128,0.95), rgba(255,99,71,0.9));
  justify-content: center;
  align-items: center;
  z-index: 40;
}

.menu-active li {
  margin: 1rem 0;
}

.menu-active .close-button {
  position: absolute;
  top: 24px;
  right: 24px;
  font-size: 3rem;
}

.menu ul {
  list-style: none;
}

.menu a {
  color: white;
  font-size: 2rem;
  font-family: 'Inter', Arial, sans-serif;
  text-decoration: none;
}

@media (max-width: 768px) {
  .header {
    display: none;
  }

  .headerMobile {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 1rem 1.25rem;
    background: linear-gradient(115deg, rgba(0,0,0,0.96), rgba(105,0,128,0.92), rgba(0,0,0,0.96));
    position: sticky;
    top: 0;
    z-index: 20;
  }
}