.paper-texture{background-image:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" opacity="0.03"><filter id="noise"><feTurbulence type="fractalNoise" baseFrequency="0.9" numOctaves="4" /></filter><rect width="100" height="100" filter="url(%23noise)" /></svg>')}.reading-progress{transition:width .1s ease-out;box-shadow:0 0 4px rgba(147,51,234,.4)}.sidebar-scroll{scroll-behavior:smooth}.card-lift{transition:all .3s cubic-bezier(.4,0,.2,1)}.card-lift:hover{transform:translateY(-4px)}.custom-bullet{list-style-type:none}.custom-bullet li:before{content:"•";color:#a855f7;font-weight:700;display:inline-block;width:1em;margin-left:-1em}@keyframes shimmer{0%{background-position:-468px 0}to{background-position:468px 0}}.skeleton-shimmer{animation:shimmer 1.2s ease-in-out infinite;background:linear-gradient(90deg,#e5e7eb 8%,#d1d5db 18%,#e5e7eb 33%);background-size:800px 104px}.tab-transition{transition:all .2s ease-in-out}