:root{--trivia-glow-cyan:#06b6d466;--trivia-glow-teal:#14b8a666;--trivia-glow-violet:#8b5cf666;--trivia-glow-gold:#fbbf2466;--trivia-correct:#10b981;--trivia-incorrect:#ef4444;--brain-pulsate-color:#6366f14d}html[data-theme=light]{--trivia-glow-cyan:#06b6d426;--trivia-glow-teal:#14b8a626;--trivia-glow-violet:#8b5cf626;--trivia-glow-gold:#fbbf2426;--brain-pulsate-color:#6366f126}@keyframes trivia-bg-shift{0%{background-position:0%}50%{background-position:100%}to{background-position:0%}}@keyframes float-icon{0%{transform:translateY(0)rotate(0)}50%{transform:translateY(-10px)rotate(5deg)}to{transform:translateY(0)rotate(0)}}@keyframes brain-pulse{0%{filter:drop-shadow(0 0 10px var(--brain-pulsate-color));transform:scale(1)}50%{filter:drop-shadow(0 0 25px var(--brain-pulsate-color));transform:scale(1.04)}to{filter:drop-shadow(0 0 10px var(--brain-pulsate-color));transform:scale(1)}}@keyframes shake-card{0%,to{transform:translate(0)}15%,45%,75%{transform:translate(-8px)}30%,60%,90%{transform:translate(8px)}}@keyframes correct-glow{0%{box-shadow:0 0 #10b981b3}70%{box-shadow:0 0 0 15px #10b98100}to{box-shadow:0 0 #10b98100}}@keyframes coin-fly{0%{opacity:1;transform:translateY(0)scale(1)}80%{opacity:.9}to{opacity:0;transform:translateY(-100px)scale(.6)}}@keyframes flame-pulse{0%,to{opacity:.9;transform:scale(1)}50%{opacity:1;filter:drop-shadow(0 0 8px #f59e0b);transform:scale(1.15)}}@keyframes slide-in-toast{0%{opacity:0;transform:translateY(100px)scale(.9)}15%{opacity:1;transform:translateY(0)scale(1)}85%{opacity:1;transform:translateY(0)scale(1)}to{opacity:0;transform:translateY(-100px)scale(.9)}}.trivia-animated-bg{background:linear-gradient(-45deg,#070913,#0b0e1e,#1e1b4b,#030712) 0 0/400% 400%;animation:20s infinite trivia-bg-shift}html[data-theme=light] .trivia-animated-bg{background:linear-gradient(-45deg,#f8fafc,#f1f5f9,#e2e8f0,#f8fafc) 0 0/400% 400%;animation:20s infinite trivia-bg-shift}.trivia-float-1{animation:6s ease-in-out infinite float-icon}.trivia-float-2{animation:8s ease-in-out 1s infinite float-icon}.trivia-float-3{animation:7s ease-in-out 2s infinite float-icon}.trivia-float-4{animation:9s ease-in-out .5s infinite float-icon}.brain-art{animation:4s ease-in-out infinite brain-pulse}.shake-animation{animation:.5s ease-in-out shake-card}.correct-pulse-animation{animation:.8s ease-out correct-glow}.coin-fly-effect{animation:.8s cubic-bezier(.25,1,.5,1) forwards coin-fly}.flame-active{animation:1s ease-in-out infinite flame-pulse}.achievement-popup{animation:4s cubic-bezier(.16,1,.3,1) forwards slide-in-toast}.scrollbar-hidden::-webkit-scrollbar{display:none}.scrollbar-hidden{-ms-overflow-style:none;scrollbar-width:none}.trivia-glass-card{-webkit-backdrop-filter:blur(16px);background:#0f1426a6;border:1px solid #ffffff14;transition:border-color .3s,box-shadow .3s,transform .2s;box-shadow:0 8px 32px #0000005e}html[data-theme=light] .trivia-glass-card{-webkit-backdrop-filter:blur(16px);background:#ffffffbf;border:1px solid #00000014;box-shadow:0 8px 32px #0f172a14}.trivia-glass-card-hover:hover{border-color:#06b6d44d;transform:translateY(-2px);box-shadow:0 8px 32px #06b6d41a}.btn-trivia-option{transition:all .2s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}.btn-trivia-option:before{content:"";background:linear-gradient(90deg,#ffffff0d,#0000);width:100%;height:100%;transition:transform .5s;position:absolute;top:0;left:0;transform:translate(-100%)}.btn-trivia-option:hover:before{transform:translate(100%)}.flame-gradient{background:linear-gradient(135deg,#f59e0b,#ef4444);-webkit-text-fill-color:transparent;-webkit-background-clip:text}@media (max-width:640px){.trivia-float-1,.trivia-float-2,.trivia-float-3,.trivia-float-4{opacity:.3}.trivia-glass-card{border-radius:1rem;padding:1.25rem}.btn-trivia-option{min-height:52px;padding:1rem .8rem;font-size:.85rem}h1.trivia-title{font-size:2.25rem}.gameplay-hud{gap:.5rem;font-size:.75rem}.question-text{font-size:1.1rem;line-height:1.4}.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem}.powerups-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:.5rem}}