.challenge-container{--primary-glow:rgba(255,107,0,0.4);--secondary-glow:rgba(0,102,255,0.3);perspective:1000px}.daily-card{background:rgba(255,255,255,.8);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border:1px solid rgba(255,255,255,.3);border-radius:1rem;box-shadow:0 25px 50px -12px rgba(0,0,0,.1);transition:transform .4s cubic-bezier(.175,.885,.32,1.275)}.daily-card:hover{transform:translateY(-5px)}.placeholder-card{background:white;border-radius:3.5rem;box-shadow:0 0 0 1px rgba(0,0,0,.05),0 40px 100px -20px rgba(0,0,0,.1),0 20px 50px -10px rgba(255,107,0,.05)}.streak-badge{background:linear-gradient(135deg,#FF6B00,#FFB800);box-shadow:0 10px 40px -5px rgba(255,107,0,.5),inset 0 2px 4px rgba(255,255,255,.4);animation:float 4s ease-in-out infinite;border:2px solid rgba(255,255,255,.2);position:relative;overflow:hidden}.streak-badge:after{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle,rgba(255,255,255,.3) 0,transparent 60%);pointer-events:none}@keyframes float{0%,to{transform:translateY(0) rotate(-1deg)}50%{transform:translateY(-12px) rotate(1deg)}}.option-button{background:white;border:2px solid #f1f5f9;border-radius:1rem;padding:.4rem .8rem;transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden;cursor:pointer}.option-button:hover{border-color:#FF6B00;background:#FFF9F5;transform:scale(1.02)}.option-button.selected{background:#FF6B00;border-color:#FF6B00;color:white;box-shadow:0 15px 30px -10px rgba(255,107,0,.4)}.option-button.correct{background:#10B981;border-color:#10B981;color:white}.option-button.wrong{background:#EF4444;border-color:#EF4444;color:white}.streak-track{height:10px;background:rgba(255,255,255,.08);border-radius:100px;overflow:hidden;position:relative;border:1px solid rgba(255,255,255,.1)}.streak-progress{height:100%;background:linear-gradient(90deg,#FF6B00,#FFD600,#FF6B00);background-size:200% 100%;border-radius:100px;transition:width 1s cubic-bezier(.65,0,.35,1);animation:shine-alt 3s linear infinite}@keyframes shine-alt{to{background-position:200% 0}}.reward-vault{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);backdrop-filter:blur(12px);border-radius:1.5rem;padding:1.25rem;transition:all .3s cubic-bezier(.4,0,.2,1)}.reward-vault:hover{background:rgba(255,255,255,.08);transform:translateY(-3px) scale(1.02);border-color:rgba(255,255,255,.2);box-shadow:0 10px 30px -10px rgba(0,0,0,.3)}.winner-section{background:linear-gradient(135deg,#1e293b,#0f172a);color:white;border-radius:2rem;padding:2rem;position:relative;border:1px solid rgba(255,255,255,.1);box-shadow:0 25px 50px -12px rgba(0,0,0,.5)}.winner-section:after{content:"🏆";position:absolute;font-size:5rem;right:1.5rem;bottom:0;opacity:.2;transform:rotate(15deg)}.pulse-primary{animation:pulse-ring 2s infinite}@keyframes pulse-ring{0%{box-shadow:0 0 0 0 rgba(255,107,0,.4)}70%{box-shadow:0 0 0 20px rgba(255,107,0,0)}to{box-shadow:0 0 0 0 rgba(255,107,0,0)}}.confetti-canvas{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:10}.q-text-html{line-height:1.6;font-size:1.1rem;color:#1e293b;font-weight:600}.q-text-html p{margin-bottom:.2rem;display:block}.q-text-html img{max-width:100%;max-height:320px;height:auto;display:block;margin:.5rem auto;border-radius:.75rem;box-shadow:0 2px 8px rgba(0,0,0,.05)}.q-text-html .math-img{display:inline-block;margin:0 2px;height:1.1em;vertical-align:middle}.math-block{display:inline-block;color:#f97316;font-size:1.15em;font-weight:700;padding:0 2px;font-family:Times New Roman,Times,serif;vertical-align:baseline}.option-button div[dangerouslySetInnerHTML]{width:100%}.option-button .math-block{color:inherit}.option-button img{max-width:100%;height:auto;display:block;margin:.5rem 0;border-radius:.75rem}.option-button.correct .math-block,.option-button.selected .math-block,.option-button.wrong .math-block{color:white}@media (max-width:768px){.q-text-html{font-size:1.1rem}}