.timeline-spine:before{content:"";background:linear-gradient(#6366f133 0%,#6366f1cc 20%,#a855f7cc 80%,#a855f733 100%) 0 0/100% 200%;border-radius:9999px;width:4px;animation:8s linear infinite spineGlow;position:absolute;top:0;bottom:0;box-shadow:0 0 8px #6366f14d}@keyframes spineGlow{0%{background-position:0 0}50%{background-position:0 100%}to{background-position:0 0}}.timeline-card{backface-visibility:hidden;transition:all .4s cubic-bezier(.16,1,.3,1);transform:translateZ(0)}.timeline-card:hover{transform:translateY(-4px)scale(1.015);box-shadow:0 20px 25px -5px #0000001a,0 8px 10px -6px #0000001a}.scroll-progress-container{z-index:50;pointer-events:none;height:4px;position:fixed;top:0;left:0;right:0}.scroll-progress-bar{width:0%;height:100%;transition:width .1s ease-out}.glow-pulse{position:relative}.glow-pulse:after{content:"";opacity:.8;border:2px solid;border-radius:9999px;animation:2s cubic-bezier(.16,1,.3,1) infinite pulseOut;position:absolute;inset:-4px}@keyframes pulseOut{0%{opacity:.8;transform:scale(1)}to{opacity:0;transform:scale(2.2)}}.immersive-overlay{-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:radial-gradient(circle,#0f172af2 0%,#020617fa 100%)}.immersive-card-wrapper{perspective:1000px}.immersive-content-card{border:1px solid #ffffff14;box-shadow:0 0 50px #00000080,inset 0 1px #ffffff1a}.custom-scrollbar::-webkit-scrollbar{width:6px}.custom-scrollbar::-webkit-scrollbar-track{background:0 0}.custom-scrollbar::-webkit-scrollbar-thumb{background:#9ca3af4d;border-radius:9999px}.custom-scrollbar::-webkit-scrollbar-thumb:hover{background:#9ca3af80}