body,h1,h2,h3,h4,h5,h6{font-family:Lexend,sans-serif}:root{--primary-color: #8FBFE0;--dark-navy: #1A2B3C}.header-gradient{background:linear-gradient(to right,var(--dark-navy) 0%,var(--primary-color) 100%)}.fixed-header{position:sticky;top:0;z-index:50}.perspective{perspective:1000px}.preserve-3d{transform-style:preserve-3d}.backface-hidden{backface-visibility:hidden;-webkit-backface-visibility:hidden}.rotate-y-180{transform:rotateY(180deg)}