:root{--color-primary:#6366f1;--color-primary-dark:#4f46e5;--color-primary-light:#818cf8;--color-secondary:#ec4899;--color-secondary-dark:#db2777;--color-accent:#14b8a6;--color-accent-dark:#0d9488;--color-bg:#ffffff;--color-bg-secondary:#f9fafb;--color-bg-tertiary:#f3f4f6;--color-text:#111827;--color-text-secondary:#6b7280;--color-text-muted:#9ca3af;--color-border:#e5e7eb;--bg-color:var(--color-bg);--text-color:var(--color-text);--title-bar-bg:var(--color-bg);--title-bar-text:var(--color-text);--card-bg-color:var(--color-bg);--border-color:var(--color-border);--shadow-sm:0 1px 2px 0 rgb(0 0 0 / 0.05);--shadow-md:0 4px 6px -1px rgb(0 0 0 / 0.1);--shadow-lg:0 10px 15px -3px rgb(0 0 0 / 0.1);--shadow-xl:0 20px 25px -5px rgb(0 0 0 / 0.1);--shadow-hover-highlight:0 25px 50px -12px rgb(0 0 0 / 0.25);--focus-ring-color:rgba(99, 102, 241, 0.1);--color-warning:#fbbf24;--color-success:#10b981;--color-success-dark:#059669;--color-error:#ef4444;--color-error-dark:#dc2626;--color-accent-dark:#0d9488}[data-theme=dark]{--color-bg:#0f172a;--color-bg-secondary:#1e293b;--color-bg-tertiary:#334155;--color-text:#f1f5f9;--color-text-secondary:#cbd5e1;--color-text-muted:#94a3b8;--color-border:#334155;--bg-color:var(--color-bg);--text-color:var(--color-text);--title-bar-bg:var(--color-bg);--title-bar-text:var(--color-text);--card-bg-color:var(--color-bg-secondary);--border-color:var(--color-border)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background-color:var(--color-bg);color:var(--color-text);line-height:1.6;overflow-x:hidden;transition:background-color .3s,color .3s;display:flex;flex-direction:column;min-height:100vh}.btn-primary,.cool-btn{display:inline-flex;align-items:center;gap:12px;padding:14px 28px;background:linear-gradient(135deg,var(--color-primary),var(--color-primary-dark));color:#fff;text-decoration:none;border:none;border-radius:10px;font-weight:600;font-size:1rem;cursor:pointer;transition:all .3s cubic-bezier(.4, 0, .2, 1);box-shadow:var(--shadow-lg)}.btn-primary:hover,.cool-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-xl)}.card,.modern-card{background:var(--card-bg-color);padding:32px;border-radius:16px;border:1px solid var(--color-border);transition:all .3s cubic-bezier(.4, 0, .2, 1);box-shadow:var(--shadow-sm)}.card:hover,.modern-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}.section-heading{font-family:"Space Grotesk",sans-serif;font-size:clamp(2rem, 4vw, 3rem);font-weight:800;line-height:1.2;margin-bottom:16px;color:var(--color-text)}.section-subheading{font-size:1.125rem;color:var(--color-text-secondary);line-height:1.7}input[type=email],input[type=password],input[type=text],select,textarea{width:100%;padding:12px 16px;border:2px solid var(--color-border);border-radius:10px;font-family:Inter,sans-serif;font-size:1rem;background:var(--color-bg);color:var(--color-text);transition:all .3s}input:focus,select:focus,textarea:focus{outline:0;border-color:var(--color-primary);box-shadow:0 0 0 3px var(--focus-ring-color)}.modern-container{max-width:1200px;margin:0 auto;padding:60px 20px}.page-header{text-align:center;padding:80px 20px 60px;background:linear-gradient(135deg,var(--color-bg) 0,var(--color-bg-secondary) 100%)}.page-title{font-family:"Space Grotesk",sans-serif;font-size:clamp(2.5rem, 6vw, 4rem);font-weight:800;margin-bottom:16px;color:var(--color-text)}.page-description{font-size:1.25rem;color:var(--color-text-secondary);max-width:700px;margin:0 auto}body{position:relative;background:var(--color-bg);overflow-x:hidden}body::before{content:"";position:fixed;top:0;left:0;width:100%;height:100%;background:radial-gradient(circle at 20% 20%,rgba(99,102,241,.1) 0,transparent 50%),radial-gradient(circle at 80% 80%,rgba(139,92,246,.1) 0,transparent 50%),radial-gradient(circle at 40% 60%,rgba(236,72,153,.08) 0,transparent 50%);pointer-events:none;z-index:0}.question-header{text-align:center;margin-bottom:40px;animation:fadeInDown .6s ease-out}.daily-question-title{font-family:"Space Grotesk",sans-serif;font-size:2.5rem;font-weight:800;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:8px;letter-spacing:-.5px}.question-subtitle{font-size:1.125rem;color:var(--color-text-secondary);font-weight:500}.subject-badge{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;margin-bottom:24px;border-radius:25px;background:linear-gradient(135deg,var(--color-primary),var(--color-primary-dark));color:#fff;font-size:.875rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px;box-shadow:0 4px 15px rgba(99,102,241,.3);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;animation:bounceIn .6s ease-out;transition:all .3s ease}.subject-badge:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(99,102,241,.4)}.subject-badge i{font-size:1rem}.question-container{position:relative;background:var(--card-bg-color);border-radius:24px;box-shadow:0 20px 60px rgba(0,0,0,.1),0 0 0 1px var(--color-border);border:none;padding:56px;width:90%;max-width:800px;text-align:center;margin:80px auto 60px;animation:fadeInUp .6s ease-out;overflow:hidden;z-index:1}.question-container::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--color-primary),var(--color-accent),var(--color-primary));background-size:200% 100%;animation:shimmer 3s ease-in-out infinite}@keyframes shimmer{0%{background-position:-200% 0}100%{background-position:200% 0}}@keyframes fadeInDown{from{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes bounceIn{0%{opacity:0;transform:scale(.3)}50%{opacity:1;transform:scale(1.05)}70%{transform:scale(.9)}100%{transform:scale(1)}}.question-text{font-family:"Space Grotesk",sans-serif;font-size:1.75rem;font-weight:700;margin-bottom:40px;color:var(--color-text);line-height:1.5;position:relative;padding:0 20px}.question-text::before{content:'"';position:absolute;left:0;top:-.3em;font-size:2.5em;color:var(--color-primary);opacity:.2;font-family:Georgia,serif;line-height:1;pointer-events:none}.question-icon{display:inline-flex;align-items:center;justify-content:center;width:64px;height:64px;border-radius:50%;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));color:#fff;font-size:2rem;margin-bottom:24px;box-shadow:0 8px 24px rgba(99,102,241,.3);animation:pulse 2s ease-in-out infinite}@keyframes pulse{0%,100%{transform:scale(1);box-shadow:0 8px 24px rgba(99,102,241,.3)}50%{transform:scale(1.05);box-shadow:0 12px 32px rgba(99,102,241,.4)}}.no-question-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 20px}.no-question-state i{font-size:4rem;color:var(--color-primary);margin-bottom:24px}.no-question-state h2{margin-bottom:8px}.no-question-state p{font-size:1.125rem;color:var(--color-text-secondary);margin-top:16px}#answers-list{display:flex;flex-direction:column;gap:16px;margin-bottom:32px;animation:fadeIn .8s ease-out .3s both}@keyframes fadeIn{from{opacity:0}to{opacity:1}}.answer-btn{position:relative;padding:20px 28px;font-size:1.1rem;font-family:Inter,sans-serif;font-weight:500;width:100%;border-radius:16px;border:2px solid var(--color-border);background:var(--card-bg-color);color:var(--color-text);cursor:pointer;transition:all .3s cubic-bezier(.4, 0, .2, 1);text-align:left;overflow:hidden;display:flex;align-items:center;gap:12px}.answer-letter{display:inline-flex;align-items:center;justify-content:center;min-width:32px;height:32px;font-weight:700;color:var(--color-primary);background:rgba(99,102,241,.1);border-radius:8px;transition:all .3s ease}.answer-btn::before{content:"";position:absolute;top:0;left:0;width:4px;height:100%;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));transform:scaleY(0);transition:transform .3s ease}.answer-btn:hover::before{transform:scaleY(1)}.answer-btn:hover{background:var(--color-bg);border-color:var(--color-primary);transform:translateX(8px);box-shadow:0 8px 24px rgba(0,0,0,.1)}.answer-btn.active{background:linear-gradient(135deg,var(--color-primary),var(--color-primary-dark));color:#fff;border-color:var(--color-primary);transform:scale(1.02) translateX(4px);box-shadow:0 12px 32px rgba(99,102,241,.3)}.answer-btn.active .answer-letter{background:rgba(255,255,255,.2);color:#fff}.answer-btn.active::before{transform:scaleY(1);background:rgba(255,255,255,.1)}.answer-btn.correct{background:linear-gradient(135deg,var(--color-success),var(--color-success-dark));color:#fff;border-color:var(--color-success);animation:correctAnswer .6s ease-out}.answer-btn.correct .answer-letter{background:rgba(255,255,255,.3);color:#fff}.answer-btn.incorrect{background:linear-gradient(135deg,var(--color-error),var(--color-error-dark));color:#fff;border-color:var(--color-error);animation:shake .5s ease-out}.answer-btn.incorrect .answer-letter{background:rgba(255,255,255,.3);color:#fff}@keyframes correctAnswer{0%{transform:scale(1)}50%{transform:scale(1.05)}100%{transform:scale(1.02)}}@keyframes shake{0%,100%{transform:translateX(0)}10%,30%,50%,70%,90%{transform:translateX(-8px)}20%,40%,60%,80%{transform:translateX(8px)}}.check-btn{margin-top:24px;padding:18px 48px;font-size:1.125rem;font-weight:700;background:linear-gradient(135deg,var(--color-accent),var(--color-accent-dark));color:#fff;border:none;border-radius:16px;cursor:pointer;transition:all .3s cubic-bezier(.4, 0, .2, 1);box-shadow:0 8px 24px rgba(139,92,246,.3);position:relative;overflow:hidden;letter-spacing:.5px;display:inline-flex;align-items:center;gap:10px;justify-content:center}.check-btn::before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);transition:left .5s ease}.check-btn:hover::before{left:100%}.check-btn:hover{transform:translateY(-3px);box-shadow:0 12px 32px rgba(139,92,246,.4)}.check-btn:active{transform:translateY(-1px)}.check-btn:disabled{opacity:.6;cursor:not-allowed;transform:none;box-shadow:0 4px 12px rgba(139,92,246,.2)}.result-message{margin-top:32px;font-size:1.25rem;font-weight:700;font-family:"Space Grotesk",sans-serif;padding:20px 28px;border-radius:16px;min-height:24px;animation:slideIn .4s ease-out;display:flex;align-items:center;justify-content:center;gap:12px}@keyframes slideIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.result-message.correct{color:var(--color-success);background:rgba(16,185,129,.15);border:2px solid var(--color-success);box-shadow:0 8px 24px rgba(16,185,129,.2)}.result-message.incorrect{color:var(--color-error);background:rgba(239,68,68,.15);border:2px solid var(--color-error);box-shadow:0 8px 24px rgba(239,68,68,.2)}@media (max-width:768px){.question-container{padding:40px 28px;margin:60px 20px 40px;width:calc(100% - 40px);border-radius:20px}.daily-question-title{font-size:2rem}.question-text{font-size:1.375rem;padding:0 10px}.question-text::before{font-size:2em;left:0;top:-.25em}.answer-btn{padding:18px 24px;font-size:1rem;border-radius:14px}.check-btn{width:100%;padding:16px 36px}.result-message{font-size:1.1rem;padding:18px 24px}.question-icon{width:56px;height:56px;font-size:1.75rem}}@media (prefers-reduced-motion:reduce){.answer-btn,.question-container,.question-icon,.result-message,.subject-badge,body::before{animation:none!important}.answer-btn,.check-btn,.subject-badge{transition:none!important}}[data-theme=dark] .question-container{box-shadow:0 20px 60px rgba(0,0,0,.4),0 0 0 1px rgba(255,255,255,.1)}[data-theme=dark] .answer-btn:hover{box-shadow:0 8px 24px rgba(99,102,241,.2)}[data-theme=dark] .subject-badge{box-shadow:0 4px 15px rgba(99,102,241,.4)}.answer-btn.loading{pointer-events:none;opacity:.7}.answer-btn:focus-visible,.check-btn:focus-visible{outline:3px solid var(--color-primary);outline-offset:3px}@media print{body::before{display:none}.question-container{box-shadow:none;border:1px solid #000}}