.header {
  width: 100%;
  height: 80px;
  padding: 10px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: fixed;
  top: 0;
  transition: all 0.5s ease;
  z-index: 2;
}
.header-scrolled {
  background-color: #b0d7ffa5;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  height: 60px;
}
.header-container {
  width: calc(100% - 20px);
  max-width: 1000px;
  height: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.header_banner {
  position: absolute;
  height: 100%;
}
.header_banner_dark {
  transition: opacity 0.5s ease;
}
.header-float-left {
  position: relative;
  height: 100%;
  cursor: pointer;
  transition: opacity 0.3s ease;
}
.header-float-left:hover {
  opacity: 0.6;
}
.button-header {
  padding: 10px 20px;
  font-size: 1em;
  transition: all 0.4s ease;
  color: #ffffff;
}
.button-header:hover {
  opacity: 0.5;
}
.button-header-scrolled {
  color: #003764;
}
.contact-button-header {
  background-color: #bfe2ff;
  color: #003764;
  border-radius: 20px;
  padding: 10px 20px;
  font-size: 1em;
  transition: all 0.4s ease;
  margin-right: 20px;
}
.contact-button-header-scrolled {
  background-color: #003764;
  color: #ffffff;
}
.header-background-gradient {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 120px;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.205) 0%, rgba(0,0,0,0) 100%);
  z-index: 1;
}

/* responsive */
@media screen and (max-width: 400px) {
  .header-container {
    width: calc(100% - 10px);
  }
  .button-header {
    display: none;
  }
}