@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInLeft{0%{opacity:0;transform:translate(-30px)}to{opacity:1;transform:translate(0)}}@keyframes slideInRight{0%{opacity:0;transform:translate(30px)}to{opacity:1;transform:translate(0)}}@keyframes scaleIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes pulseDot{0%,to{opacity:1}50%{opacity:.4}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}@keyframes glow{0%,to{box-shadow:0 0 5px #0d94884d}50%{box-shadow:0 0 20px #0d948899}}@keyframes ripple{to{opacity:0;transform:translate(-50%,-50%)scale(4)}}@keyframes shimmer{0%{background-position:-1000px 0}to{background-position:1000px 0}}@keyframes countPop{0%{opacity:0;transform:scale(.8)}70%{transform:scale(1.08)}to{opacity:1;transform:scale(1)}}.premium-card{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:linear-gradient(135deg,#0d948814,#ffffffe6);border:1.5px solid #0d94882e;border-radius:20px;padding:24px;transition:all .3s cubic-bezier(.22,1,.36,1);box-shadow:0 4px 16px #0000000a}.premium-card:hover{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transform:translateY(-4px)scale(1.01);box-shadow:0 8px 24px #00000014}.premium-badge{color:#0d9488;letter-spacing:.5px;text-transform:uppercase;background:#0d94881f;border:1px solid #0d948838;border-radius:10px;align-items:center;gap:6px;padding:6px 12px;font-size:10px;font-weight:800;display:inline-flex}.premium-button{cursor:pointer;letter-spacing:-.02em;border:none;border-radius:12px;font-weight:800;transition:all .25s cubic-bezier(.22,1,.36,1);position:relative;overflow:hidden}.premium-button-primary{color:#fff;background:linear-gradient(135deg,#0d9488,#14b8a6);padding:12px 24px;font-size:14px;box-shadow:0 8px 24px #0d948847}.premium-button-primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px #0d94885c}.premium-button-secondary{color:#0d9488;background:#0d94881f;border:1.5px solid #0d9488;padding:11px 22px;font-size:14px}.premium-button-secondary:hover{background:#0d948833;transform:translateY(-2px)}.glassmorphism{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffffd9;border:1px solid #fff3;border-radius:12px}.glassmorphism-dark{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#0a0a0db3;border:1px solid #ffffff0d;border-radius:12px}@media (prefers-color-scheme:dark){.premium-card{background:linear-gradient(135deg,#0d948814,#14b8a605);border:1.5px solid #0d948824;box-shadow:0 8px 32px #0d948814,inset 0 1px 1px #ffffff0d}.premium-card:hover{box-shadow:0 16px 48px #0d948824,inset 0 1px 1px #ffffff14}.glassmorphism{background:#0a0a0db3;border:1px solid #ffffff0d}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}.premium-card:hover,.premium-button-primary:hover,.premium-button-secondary:hover{transform:none}}@media (width<=640px){.premium-card{border-radius:16px;padding:16px}.premium-button-primary,.premium-button-secondary{width:100%}.premium-card:hover{transform:none}}.text-gradient{background:linear-gradient(135deg,#0d9488,#5eead4);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.text-premium{letter-spacing:-.02em;font-weight:800;line-height:1.2}.text-muted{color:#999;font-size:12px;font-weight:600}.shadow-sm{box-shadow:0 2px 8px #0000000a}.shadow-md{box-shadow:0 4px 16px #00000014}.shadow-lg{box-shadow:0 8px 32px #0000001f}.shadow-xl{box-shadow:0 16px 48px #00000029}.shadow-glow{box-shadow:0 0 20px #0d94884d}:root{--bg-primary:#070b10;--bg-secondary:#0b121a;--bg-card:#111b26;--text-primary:#e7eef5;--text-secondary:#a8b6c4;--text-muted:#7c8a99;--primary:#0b7c7e;--primary-hover:#0c8185;--accent:#38c6d6;--border-subtle:#ffffff14;--text:var(--text-secondary);--text-h:var(--text-primary);--bg:var(--bg-primary);--border:var(--border-subtle);--sans:"DM Sans", -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", system-ui, sans-serif;--mono:ui-monospace, Consolas, monospace;font-family:var(--sans);--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizelegibility;font-size:16px;line-height:1.5}html,body,#root{min-height:100dvh}.question-content img{-webkit-user-select:none;user-select:none;-webkit-user-drag:none;draggable:false}.question-content img:not(.formula){pointer-events:auto;cursor:zoom-in}.question-content img.formula{pointer-events:none;vertical-align:middle;max-width:100%;max-height:2.2em;margin:0 .15em;display:inline-block}.question-content p{margin:0 0 14px}.question-content p:has(>img:only-child){text-align:center}.question-content p:has(>img:only-child) img{object-fit:contain;max-width:100%;height:auto;max-height:280px;display:inline-block}:where(button,[role=button],[role=checkbox],input,textarea,select,a):focus-visible{outline:3px solid color-mix(in srgb, var(--primary) 72%, #fff);outline-offset:3px}:where(button,[role=button],[role=checkbox],input,textarea,select,a):focus:not(:focus-visible){outline:none}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}body{color:var(--text-primary);background:radial-gradient(circle at 12% 14%,#0b7c7e0e 0%,#0000 28%),radial-gradient(circle at 88% 0,#38c6d609 0%,#0000 24%),radial-gradient(circle at 50% 112%,#0b7c7e08 0%,#0000 34%),linear-gradient(#070b10 0%,#081018 46%,#070b10 100%);margin:0}.subject-scroll-list{scrollbar-width:thin;scrollbar-color:#38c6d68c #ffffff13}.subject-scroll-list::-webkit-scrollbar{width:10px}.subject-scroll-list::-webkit-scrollbar-track{background:#ffffff13;border-radius:999px}.subject-scroll-list::-webkit-scrollbar-thumb{background:#38c6d694 padding-box padding-box;border:2px solid #0000;border-radius:999px}.subject-scroll-list::-webkit-scrollbar-thumb:hover{background:#38c6d6c7 padding-box padding-box;border:2px solid #0000}.driver-active .driver-overlay,.driver-active *{pointer-events:none}.driver-active .driver-active-element,.driver-active .driver-active-element *,.driver-popover,.driver-popover *{pointer-events:auto}@keyframes animate-fade-in{0%{opacity:0}to{opacity:1}}.driver-fade .driver-overlay{animation:.2s ease-in-out animate-fade-in}.driver-fade .driver-popover{animation:.2s animate-fade-in}.driver-popover{all:unset;box-sizing:border-box;color:#2d2d2d;z-index:1000000000;background-color:#fff;border-radius:5px;min-width:250px;max-width:300px;margin:0;padding:15px;position:fixed;top:0;right:0;box-shadow:0 1px 10px #0006}.driver-popover *{font-family:Helvetica Neue,Inter,ui-sans-serif,Apple Color Emoji,Helvetica,Arial,sans-serif}.driver-popover-title{zoom:1;margin:0;font:700 19px/1.5 sans-serif;display:block;position:relative}.driver-popover-close-btn{all:unset;cursor:pointer;color:#d2d2d2;z-index:1;text-align:center;width:32px;height:28px;font-size:18px;font-weight:500;transition:color .2s;position:absolute;top:0;right:0}.driver-popover-close-btn:hover,.driver-popover-close-btn:focus{color:#2d2d2d}.driver-popover-title[style*=block]+.driver-popover-description{margin-top:5px}.driver-popover-description{zoom:1;margin-bottom:0;font:400 14px/1.5 sans-serif}.driver-popover-footer{text-align:right;zoom:1;justify-content:space-between;align-items:center;margin-top:15px;display:flex}.driver-popover-progress-text{color:#727272;zoom:1;font-size:13px;font-weight:400}.driver-popover-footer button{all:unset;box-sizing:border-box;text-shadow:1px 1px #fff;color:#2d2d2d;cursor:pointer;zoom:1;background-color:#fff;border:1px solid #ccc;border-radius:3px;outline:0;padding:3px 7px;font:12px/1.3 sans-serif;text-decoration:none;display:inline-block}.driver-popover-footer .driver-popover-btn-disabled{opacity:.5;pointer-events:none}:not(body):has(>.driver-active-element){overflow:hidden!important}.driver-no-interaction,.driver-no-interaction *{pointer-events:none!important}.driver-popover-footer button:hover,.driver-popover-footer button:focus{background-color:#f7f7f7}.driver-popover-navigation-btns{flex-grow:1;justify-content:flex-end;display:flex}.driver-popover-navigation-btns button+button{margin-left:4px}.driver-popover-arrow{content:"";border:5px solid #fff;position:absolute}.driver-popover-arrow-side-over{display:none}.driver-popover-arrow-side-left{border-top-color:#0000;border-bottom-color:#0000;border-right-color:#0000;left:100%}.driver-popover-arrow-side-right{border-top-color:#0000;border-bottom-color:#0000;border-left-color:#0000;right:100%}.driver-popover-arrow-side-top{border-bottom-color:#0000;border-left-color:#0000;border-right-color:#0000;top:100%}.driver-popover-arrow-side-bottom{border-top-color:#0000;border-left-color:#0000;border-right-color:#0000;bottom:100%}.driver-popover-arrow-side-center{display:none}.driver-popover-arrow-side-left.driver-popover-arrow-align-start,.driver-popover-arrow-side-right.driver-popover-arrow-align-start{top:15px}.driver-popover-arrow-side-top.driver-popover-arrow-align-start,.driver-popover-arrow-side-bottom.driver-popover-arrow-align-start{left:15px}.driver-popover-arrow-align-end.driver-popover-arrow-side-left,.driver-popover-arrow-align-end.driver-popover-arrow-side-right{bottom:15px}.driver-popover-arrow-side-top.driver-popover-arrow-align-end,.driver-popover-arrow-side-bottom.driver-popover-arrow-align-end{right:15px}.driver-popover-arrow-side-left.driver-popover-arrow-align-center,.driver-popover-arrow-side-right.driver-popover-arrow-align-center{margin-top:-5px;top:50%}.driver-popover-arrow-side-top.driver-popover-arrow-align-center,.driver-popover-arrow-side-bottom.driver-popover-arrow-align-center{margin-left:-5px;left:50%}.driver-popover-arrow-none{display:none}@keyframes networkRing{0%{opacity:.28;transform:scale(.94)}50%{opacity:.72;transform:scale(1.03)}to{opacity:.28;transform:scale(.94)}}.glassmorphism{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffffd9;border:1px solid #fff3}.glassmorphism-dark{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#0a0a0db3;border:1px solid #ffffff0d}.smooth-transition{transition:all .3s cubic-bezier(.22,1,.36,1)}.smooth-transition-fast{transition:all .15s cubic-bezier(.22,1,.36,1)}.hover-lift:hover{transform:translateY(-4px)}.hover-lift:active{transform:translateY(-2px)}.feature-card-premium{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:linear-gradient(135deg,#0d948814,#fff9);border:1.5px solid #0d94882e;border-radius:20px;padding:26px 28px;transition:all .3s cubic-bezier(.22,1,.36,1);position:relative;overflow:hidden;box-shadow:0 8px 32px #0d94881f,inset 0 1px 1px #ffffff80}.feature-card-premium:before{content:"";pointer-events:none;background:radial-gradient(circle,#0d94881a 0%,#0000 70%);width:120px;height:120px;position:absolute;top:0;right:0}.feature-card-premium:hover{transform:translateY(-4px)scale(1.02);box-shadow:0 16px 48px #0d948838,inset 0 1px 1px #ffffff80}.btn-premium{cursor:pointer;letter-spacing:-.02em;border:none;border-radius:12px;font-weight:800;transition:all .25s cubic-bezier(.22,1,.36,1);position:relative;overflow:hidden}.btn-premium-primary{color:#fff;background:linear-gradient(135deg,#0d9488,#14b8a6);padding:14px 28px;font-size:14px;box-shadow:0 8px 24px #0d948847}.btn-premium-primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px #0d94885c}.btn-premium-primary:active{transform:translateY(0)}.btn-premium-secondary{color:#0d9488;background:#0d94881f;border:1.5px solid #0d9488;padding:13px 26px;font-size:14px}.btn-premium-secondary:hover{background:#0d948833;transform:translateY(-2px)}.ai-badge{letter-spacing:1.2px;text-transform:uppercase;border-radius:6px;align-items:center;gap:4px;padding:3px 8px;font-size:9px;font-weight:800;animation:.3s ease-out scaleIn;display:inline-flex}.stat-card-premium{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffffe0;border:1px solid #0f172a17;border-radius:16px;align-items:center;gap:12px;padding:14px 18px;transition:transform .25s,box-shadow .25s;display:flex;box-shadow:0 2px 12px #0000000f}.stat-card-premium:hover{transform:translateY(-2px);box-shadow:0 4px 16px #0000001f}.stat-pulse{border-radius:50%;flex-shrink:0;width:7px;height:7px;animation:2s cubic-bezier(.4,0,.6,1) infinite pulse}.sm2-showcase{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:linear-gradient(135deg,#0d948814,#fffffff2);border:1.5px solid #0d94882e;border-radius:24px;padding:32px 36px;position:relative;overflow:hidden;box-shadow:0 8px 32px #0d94881f,inset 0 1px 1px #fff9}.sm2-step{background:#0d94880f;border:1px solid #0d948824;border-radius:16px;padding:16px 14px;transition:all .25s}.sm2-step:hover{background:#0d94881f;border-color:#0d948840;transform:translateY(-2px)}.sm2-step-number{color:#0d9488;background:#0d94882e;border-radius:8px;justify-content:center;align-items:center;width:28px;height:28px;margin-bottom:10px;font-weight:900;display:inline-flex}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}.feature-card-premium:hover,.btn-premium:hover,.stat-card-premium:hover{transform:none}}@media (width<=640px){.feature-card-premium{padding:20px 18px}.sm2-showcase{padding:24px 20px}.btn-premium{width:100%}.feature-card-premium:before{display:none}.stat-card-premium:hover{box-shadow:0 2px 12px #0000000f}}@media (prefers-color-scheme:dark){.glassmorphism{background:#0a0a0db3;border:1px solid #ffffff0d}.feature-card-premium{background:linear-gradient(135deg,#0d948814,#14b8a608);border:1.5px solid #0d94882e;box-shadow:0 8px 40px #0d94881f,inset 0 1px 1px #ffffff0d}.feature-card-premium:hover{box-shadow:0 16px 48px #0d94882e,inset 0 1px 1px #ffffff14}.stat-card-premium{background:#ffffff0e;border:1px solid #ffffff14;box-shadow:0 4px 16px #00000029,inset 0 1px 1px #ffffff0d}.stat-card-premium:hover{box-shadow:0 6px 20px #0003,inset 0 1px 1px #ffffff0d}}