: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);--motion-duration-fast:0.16s;--motion-duration-base:0.28s;--motion-duration-slow:0.55s;--motion-ease:cubic-bezier(0.22, 1, 0.36, 1);--motion-ease-emphasized:cubic-bezier(0.34, 1.56, 0.64, 1);--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 var(--motion-duration-base) var(--motion-ease),color var(--motion-duration-base) 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var(--motion-ease),border-color var(--motion-duration-fast) var(--motion-ease),background-color var(--motion-duration-fast) var(--motion-ease);will-change:transform,box-shadow;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 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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:rgba(255,255,255,.8);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-radius:24px;box-shadow:0 20px 60px rgba(0,0,0,.08),0 0 0 1px rgba(255,255,255,.5);border:1px solid rgba(255,255,255,.3);padding:48px;width:90%;max-width:800px;text-align:center;margin:70px auto 60px;animation:fadeInUp .6s ease-out;overflow:hidden;z-index:1}[data-theme=dark] .question-container{background:rgba(30,41,59,.8);border-color:rgba(99,102,241,.15);box-shadow:0 20px 60px rgba(0,0,0,.4),0 0 0 1px rgba(99,102,241,.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:1.625rem;font-weight:700;margin-bottom:36px;color:var(--color-text);line-height:1.6;position:relative;padding:0 16px;word-wrap:break-word;overflow-wrap:break-word;hyphens:auto;max-width:100%}.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:14px;margin-bottom:28px;animation:fadeIn .8s ease-out .3s both}@keyframes fadeIn{from{opacity:0}to{opacity:1}}.answer-btn{position:relative;padding:18px 24px;font-size:1.05rem;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:flex-start;gap:12px;line-height:1.6;word-wrap:break-word;overflow-wrap:break-word;hyphens:auto;min-height:56px}.answer-letter{display:inline-flex;align-items:center;justify-content:center;min-width:32px;height:32px;flex-shrink:0;font-weight:700;color:var(--color-primary);background:rgba(99,102,241,.1);border-radius:8px;transition:all .3s ease;margin-top:2px}.answer-text{flex:1;min-width:0}.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:20px;padding:16px 44px;font-size:1.05rem;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:28px;font-size:1.125rem;font-weight:700;font-family:"Space Grotesk",sans-serif;padding:18px 24px;border-radius:16px;min-height:24px;animation:slideIn .4s ease-out;display:flex;align-items:center;justify-content:center;gap:12px;word-wrap:break-word;overflow-wrap:break-word;text-align:center}@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:32px 20px;margin:50px 16px 32px;width:calc(100% - 32px);border-radius:20px}.daily-question-title{font-size:1.75rem}.question-text{font-size:1.25rem;padding:0 8px;margin-bottom:28px;line-height:1.5}.question-text::before{display:none}.answer-btn{padding:14px 16px;font-size:.95rem;border-radius:12px;gap:10px;min-height:52px}.answer-letter{min-width:28px;height:28px;font-size:.9rem}#answers-list{gap:12px;margin-bottom:24px}.check-btn{width:100%;padding:14px 32px;font-size:1rem}.result-message{font-size:1rem;padding:16px 20px;margin-top:24px}.question-icon{width:52px;height:52px;font-size:1.5rem;margin-bottom:20px}.subject-badge{padding:8px 16px;font-size:.8rem;margin-bottom:20px}}@media (max-width:1024px) and (min-width:769px){.question-container{padding:48px 40px;margin:70px auto 50px;width:85%}.question-text{font-size:1.5rem}.answer-btn{padding:18px 24px;font-size:1.05rem}}@media (max-width:480px){.question-container{padding:24px 16px;margin:40px 12px 24px;width:calc(100% - 24px);border-radius:16px}.question-text{font-size:1.125rem;margin-bottom:24px;padding:0 4px;line-height:1.5}.answer-btn{padding:13px 14px;font-size:.9rem;border-radius:10px;gap:8px;min-height:50px}.answer-letter{min-width:26px;height:26px;font-size:.85rem}#answers-list{gap:10px;margin-bottom:20px}.check-btn{padding:13px 28px;font-size:.95rem;border-radius:12px}.result-message{font-size:.95rem;padding:14px 18px;margin-top:20px;border-radius:12px}.question-icon{width:48px;height:48px;font-size:1.35rem;margin-bottom:16px}.subject-badge{padding:7px 14px;font-size:.75rem;margin-bottom:16px;gap:6px}.no-question-state{padding:32px 16px}.no-question-state i{font-size:3rem;margin-bottom:20px}.no-question-state h2{font-size:1.25rem}.no-question-state p{font-size:1rem;margin-top:12px}}@media (max-width:360px){.question-container{padding:20px 14px;margin:36px 10px 20px;width:calc(100% - 20px)}.question-text{font-size:1.05rem;margin-bottom:20px;line-height:1.5}.answer-btn{padding:12px 12px;font-size:.85rem;gap:7px;min-height:48px}.answer-letter{min-width:24px;height:24px;font-size:.8rem}#answers-list{gap:9px;margin-bottom:18px}.check-btn{padding:12px 24px;font-size:.9rem}.result-message{font-size:.9rem;padding:12px 16px;margin-top:18px}.question-icon{width:44px;height:44px;font-size:1.25rem;margin-bottom:14px}.subject-badge{padding:6px 12px;font-size:.78rem;margin-bottom:14px}}@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}}