#page-intro{position:fixed;inset:0;z-index:5;pointer-events:none;opacity:0;transition:opacity .6s ease-out}#page-intro.ready{opacity:1}#page-intro.fade-out{opacity:0}.greeting-overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;transition:opacity .6s ease,transform .6s ease}body.landing .greeting-overlay{padding-bottom:12vh}@media (max-width:820px),(pointer:coarse){body.landing .greeting-overlay{padding-bottom:0}}@media (min-width:821px) and (pointer:fine){body.landing .greeting-overlay{padding-bottom:38vh}}.greeting-overlay.fade-out{opacity:0;transform:translateY(-20px) scale(.97)}.greeting-line{opacity:0;transform:translateY(12px);animation:greetIn .7s cubic-bezier(.16,1,.3,1) forwards}.greeting-primary{font-size:clamp(1.5rem, 1.4vw + 1.1rem, 2.3rem);font-weight:300;letter-spacing:var(--ls-xs);line-height:1.25;color:var(--text-primary-color);max-width:min(84vw,760px);text-align:center;text-wrap:balance}@keyframes greetIn{to{opacity:1;transform:translateY(0)}}body{--duration-fast:150ms;--duration-normal:250ms;--duration-slow:350ms;--spring:linear(
        0 0%, 0.5571 7.53%, 0.8252 11.98%,
        0.9337 14.38%, 1.0166 16.8%,
        1.0765 19.31%, 1.1146 21.97%,
        1.1263 23.47%, 1.1325 25.06%,
        1.133 26.76%, 1.128 28.62%,
        1.1094 31.9%, 1.0484 39.77%,
        1.0218 43.85%, 1.0011 48.42%,
        0.9895 53.23%, 0.9861 59.8%,
        1 81.27% 100%
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Neue",Arial,sans-serif;display:flex;flex-direction:column;flex-wrap:nowrap;justify-content:space-between;align-items:center;min-height:100vh;min-height:100dvh;width:100%;margin:0;box-sizing:border-box;overflow-x:hidden;background:var(--bg-color);color:var(--text-primary-color);transition:background-color var(--duration-normal) ease-out,color var(--duration-normal) ease-out;overflow:hidden;letter-spacing:var(--ls-base);font-weight:var(--weight-body);min-height:100dvh;max-height:100dvh}:root:not([data-theme=dark]) body::before{background:radial-gradient(140% 105% at 50% -8%,rgb(226 233 252) 0,rgb(231 238 253) 9%,rgb(236 242 254) 18%,rgb(241 246 254) 28%,rgb(246 249 255) 39%,rgb(250 252 255) 51%,rgb(253 254 255) 64%,rgb(255 255 255) 80%)}body::before{content:'';position:fixed;inset:0;z-index:-1;pointer-events:none;background:radial-gradient(140% 105% at 46% -8%,rgb(34 52 86) 0,rgb(30 46 75) 8%,rgb(27 41 66) 16%,rgb(24 36 56) 25%,rgb(21 30 46) 34%,rgb(19 25 37) 43%,rgb(18 21 29) 52%,rgb(17 19 23) 62%,rgb(17 18 19) 73%,rgb(17 17 17) 86%)}[data-theme=dark] body{--glass-bg:rgba(255, 255, 255, 0.04);--glass-border:rgba(255, 255, 255, 0.14);--glass-highlight:inset 0 1px 0 0 rgba(255, 255, 255, 0.06),inset 0 -1px 0 0 rgba(255, 255, 255, 0.02);--shadow-crisp:rgba(255, 255, 255, 0.13) 0px 0px 0px 1px,rgba(0, 0, 0, 0.3) 0px 1px 1px -0.5px,rgba(0, 0, 0, 0.25) 0px 3px 3px -1.5px,rgba(0, 0, 0, 0.2) 0px 6px 6px -3px}.site-logo img{max-width:2.25rem;max-height:2.25rem;border-radius:var(--radius-round);corner-shape:squircle;object-fit:cover}#trial-credits{display:none;flex-direction:row;flex-wrap:nowrap}.placeholder{position:absolute;left:calc(2.25rem + var(--space-3));top:0;bottom:0;margin-block:auto;height:fit-content;color:var(--text-tertiary-color);pointer-events:none;user-select:none}.sidebar{display:flex;flex-direction:column;justify-content:flex-start;position:fixed;top:0;left:0;z-index:100;height:100vh;height:100dvh;min-height:100vh;min-height:100dvh;max-height:100vh;max-height:100dvh;width:22%;min-width:245px;max-width:270px;box-sizing:border-box;margin:0;gap:var(--space-7);padding:var(--space-4) var(--space-4) 0 var(--space-4);background-color:transparent;background:var(--section-bg-color);border-right:.5px solid var(--glass-border);border-radius:0;box-shadow:var(--shadow-crisp),var(--glass-highlight);overflow-y:auto;overflow-x:hidden;color:var(--text-primary-color);visibility:hidden;left:0;transform:translateX(calc(-100% - 16px))}.sidebar p{font-size:var(--text-md);line-height:var(--leading-normal);margin-block-start:0px;margin-block-end:0px;width:100%}.sidebar-nav{display:flex;flex-direction:column;width:100%}.sidebar-nav>*{display:flex;align-items:center;gap:var(--space-3);width:100%;padding:var(--space-4) 2px;background:0 0;border:none;border-bottom:1px solid var(--glass-border);font-family:inherit;font-size:var(--text-plus);font-weight:500;letter-spacing:-.01em;text-align:left;text-decoration:none;color:var(--text-primary-color);cursor:pointer;-webkit-tap-highlight-color:transparent;transition:color var(--duration-fast) ease-out,padding-left var(--duration-fast) ease-out}.sidebar-nav>*>svg{width:1.2rem;height:1.2rem;flex-shrink:0;color:currentColor}#new-chat-bttn::after{content:var(--kbd-new, '\2325N')}#history-bttn::after{content:var(--kbd-history, '\2318J')}#theme-toggle::after{content:var(--kbd-theme, '\2318\2325T')}#history-bttn::after,#new-chat-bttn::after,#theme-toggle::after{margin-left:auto;padding:3px 6px;border:1px solid var(--glass-border);border-radius:var(--radius-xs);corner-shape:squircle;font-size:var(--text-xxs);font-weight:500;letter-spacing:.05em;line-height:1;color:var(--text-tertiary-color)}@media (pointer:coarse){#history-bttn::after,#new-chat-bttn::after,#theme-toggle::after{display:none}}.sidebar-nav .ext-arrow{width:.9rem!important;height:.9rem!important;margin-left:auto;opacity:0;transform:translate(-3px,3px);transition:opacity var(--duration-fast) ease-out,transform var(--duration-fast) ease-out}@media (hover:hover) and (pointer:fine){.sidebar-nav>a:hover .ext-arrow{opacity:1;transform:translate(0,0)}}@media (hover:hover) and (pointer:fine){.sidebar-nav>:hover{color:var(--brand-color);padding-left:10px}}.sidebar-nav>:active{color:var(--brand-color)}.sidebar-nav .theme-slot{position:relative;width:1.05rem;height:1.05rem;flex-shrink:0}.sidebar-nav .theme-slot .theme-icon{inset:0;width:100%;height:100%}.sidebar-footer{margin-top:auto;display:flex;justify-content:center;padding:var(--space-4) 0 var(--space-5)}.site-credits{color:var(--text-tertiary-color);font-size:var(--text-xxs);opacity:.55;white-space:nowrap}@media (max-width:1000px){.right-nav{padding:var(--space-2);justify-content:center}.right-nav .bttn svg{opacity:.75!important}}@media (max-width:875px){#sidebar-bttn-header{display:flex}}@media (hover:none),(pointer:coarse){.stats-card:not(:last-child):hover{transform:none}.response-message:hover .response-toolbar{opacity:0}.response-message blockquote:hover::before{opacity:0}.agent-row[style*="cursor: pointer"]:hover{background:0 0}.agent-detail-close:hover{background:0 0;color:var(--text-tertiary-color)}.agent-detail-resize:hover{background:0 0}.delete-icon{opacity:.7!important}.step-content 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ease-out;user-select:none}@media (hover:hover) and (pointer:fine){#sidebar-tab:hover{padding-right:9px;box-shadow:inset 0 1px 0 var(--bttn-brand),inset -1px 0 0 var(--bttn-brand),inset 0 -1px 0 var(--bttn-brand),inset -2px 0 0 var(--bttn-edge-soft),var(--bttn-outline-lift)}#sidebar-tab:hover span{color:var(--text-primary-color)}}#sidebar-tab:active{transform:scale(.97)}.nn-hdr .nn-hdr-inner{gap:10px}.nn-hdr .nn-hdr-brand{flex:none}#mobile-menu-bttn{display:none!important;margin-right:auto}@media (max-width:675px){#sidebar-tab{display:none}#mobile-menu-bttn{display:inline-flex!important}}@media all and (display-mode:standalone),all and (display-mode:fullscreen){.nn-hdr{padding-top:env(safe-area-inset-top,0)}.sidebar{padding-top:calc(var(--space-4) + env(safe-area-inset-top,0px))}}@media all and (display-mode:standalone){.sidebar{padding-bottom:env(safe-area-inset-bottom,0)}}.nn-hdr-sheet{--card:var(--bg-color)}.nn-hdr{width:100%;background:0 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forwards}@keyframes tier-plus-draw{from{stroke-dashoffset:14}to{stroke-dashoffset:0}}.setting-toggle{position:relative;width:40px;height:22px;background:var(--ink-200);border-radius:11px;corner-shape:squircle;cursor:pointer;flex-shrink:0;transition:background .2s;border:none;padding:0}.setting-toggle.on{background:var(--brand)}.setting-toggle::after{content:'';position:absolute;top:2px;left:2px;width:18px;height:18px;background:#fff;border-radius:50%;corner-shape:squircle;transition:transform .2s var(--spring);box-shadow:0 1px 3px rgba(0,0,0,.15)}.setting-toggle.on::after{transform:translateX(18px)}.pricing-scroll{scrollbar-width:none;-ms-overflow-style:none}.pricing-scroll::-webkit-scrollbar{display:none}.pricing-overlay{position:fixed;inset:0;z-index:1000;background:rgba(12,13,15,.6);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;padding:24px;opacity:0;pointer-events:none;transition:opacity .25s 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14px;border-radius:var(--r-pill);corner-shape:squircle;background:var(--ink-100);color:var(--ink-500);margin-bottom:14px}.pricing-title{font-family:var(--font-display);font-size:26px;font-weight:500;color:var(--ink-900);margin-bottom:8px}.pricing-title em{font-style:normal;color:var(--brand)}.pricing-subtitle{font-size:15px;color:var(--ink-500);line-height:1.5}.pricing-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;align-items:start}.pricing-card{border:0;border-radius:var(--r-2xl);corner-shape:squircle;padding:28px 24px;position:relative;display:flex;flex-direction:column;background:var(--white);box-shadow:inset 0 1px 0 rgba(255,255,255,.7),inset 0 0 0 1px rgba(255,255,255,.45),var(--shadow-card)}.pricing-card.featured{background:linear-gradient(165deg,var(--brand-soft) 0,var(--white) 62%);box-shadow:inset 0 0 0 1.5px rgba(0,114,255,.35),var(--shadow-card),0 12px 32px 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24px;cursor:pointer;user-select:none}.pricing-scope-label{font-size:var(--text-base);font-weight:500;color:var(--ink-600)}.pricing-soon{display:inline-block;margin-left:7px;padding:2px 7px;border-radius:var(--r-pill);corner-shape:squircle;background:var(--ink-100);color:var(--ink-500);font-size:10px;font-weight:700;text-transform:uppercase;vertical-align:1px}.pricing-features li.app-perk{display:none}.pricing-cards.show-apps .pricing-features li.app-perk{display:flex}.pricing-features li.is-no{color:var(--ink-400)}.pricing-features li.is-no svg{color:var(--ink-300)}.pricing-features li.is-no strong{font-weight:500}.pricing-features li.pricing-divider{color:var(--ink-400);font-size:11px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;margin-top:8px;align-items:center}.pricing-features li.pricing-divider svg{width:16px;height:16px;color:var(--ink-400)}.pricing-features li svg{width:15px;height:15px;color:var(--correct);flex-shrink:0;margin-top:1px}.educator .pricing-features li svg{color:var(--brand)}.pricing-contact-link{display:block;width:100%;margin-top:10px;background:0 0;border:0;padding:4px 0;text-align:center;font-size:13px;font-weight:600;color:var(--brand);cursor:pointer}.pricing-contact-link:hover{text-decoration:underline}.pricing-card-action{margin-top:auto}.pricing-current{display:block;text-align:center;font-size:13px;font-weight:500;color:var(--ink-400);padding:10px 0}.pricing-btn{display:flex;text-align:center;width:100%;padding:14px 20px;border:0;text-decoration:none;cursor:pointer}.pricing-btn.disabled{background:var(--ink-100);color:var(--ink-400);cursor:default;pointer-events:none;opacity:.6}.portal-btn-loading{position:relative;pointer-events:none;color:transparent!important}.portal-spinner{position:absolute;top:50%;left:50%;width:18px;height:18px;margin:-9px 0 0 -9px;pointer-events:none;overflow:visible}.portal-spinner circle.track{stroke:rgba(255,255,255,0.22)}.portal-spinner 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var(--space-2));left:0;right:0;margin-inline:auto;width:fit-content;max-width:100%;box-sizing:border-box;padding:var(--space-3) var(--space-8) var(--space-3) var(--space-4);background:var(--text-primary-color);border-radius:var(--radius-full);corner-shape:squircle;box-shadow:var(--shadow-crisp);z-index:30;interpolate-size:allow-keywords;transition:width .3s ease}[data-theme=dark] .thinking-float-pill{background:var(--bg-color)}.thinking-float-pill .tb-headline{background:linear-gradient(100deg,rgba(255,255,255,.45) 35%,rgba(255,255,255,.95) 50%,rgba(255,255,255,.45) 65%);background-size:250% 100%;-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.input-wrapper:has(.thinking-float-pill) #scroll-bottom-bttn{bottom:calc(100% + 64px)}.thinking-bar-streaming .thinking-bar-live{height:2.6em;mask-image:linear-gradient(to bottom,transparent 0,black 35%,black 75%,transparent 100%);-webkit-mask-image:linear-gradient(to bottom,transparent 0,black 35%,black 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var(--space-4);border-radius:var(--radius-xl);corner-shape:squircle;border:1px solid var(--glass-border);cursor:pointer;transition:background var(--duration-fast),border-color var(--duration-fast)}.quiz-radio-option:hover:not(.quiz-disabled){background:var(--hover-50);border-color:var(--text-tertiary-color)}.quiz-radio-dot{width:18px;height:18px;border-radius:var(--radius-full);corner-shape:squircle;border:2px solid var(--text-tertiary-color);flex-shrink:0;position:relative;transition:border-color var(--duration-fast)}.quiz-radio-dot::after{content:'';position:absolute;inset:3px;border-radius:var(--radius-full);corner-shape:squircle;background:0 0;transition:background var(--duration-fast)}.quiz-radio-label{font-size:var(--text-sm);color:var(--text-primary-color);line-height:var(--leading-normal)}.quiz-radio-option.quiz-disabled{pointer-events:none;opacity:.7}.quiz-correct{border-color:var(--color-success,#22c55e)!important;background:color-mix(in oklab,var(--color-success,#22c55e) 12%,transparent)!important;animation:quizFlash .4s ease-out}.quiz-correct .quiz-radio-dot{border-color:var(--color-success,#22c55e)}.quiz-correct .quiz-radio-dot::after{background:var(--color-success,#22c55e)}.quiz-correct .quiz-radio-label{color:var(--color-success,#22c55e);font-weight:500}.quiz-correct.qa-pill{color:var(--color-success,#22c55e)!important;font-weight:500}.quiz-wrong{border-color:var(--color-destructive,#ef4444)!important;background:color-mix(in oklab,var(--color-destructive,#ef4444) 12%,transparent)!important;animation:quizShake .4s ease-out}.quiz-wrong .quiz-radio-dot{border-color:var(--color-destructive,#ef4444)}.quiz-wrong .quiz-radio-dot::after{background:var(--color-destructive,#ef4444)}.quiz-wrong .quiz-radio-label{color:var(--color-destructive,#ef4444);font-weight:500}.quiz-wrong.qa-pill{color:var(--color-destructive,#ef4444)!important;font-weight:500}@keyframes quizFlash{0%{transform:scale(1)}50%{transform:scale(1.05)}100%{transform:scale(1)}}@keyframes quizShake{0%,100%{transform:translateX(0)}20%{transform:translateX(-4px)}40%{transform:translateX(4px)}60%{transform:translateX(-3px)}80%{transform:translateX(2px)}}.quiz-explanation{font-size:var(--text-sm);color:var(--text-secondary-color);line-height:var(--leading-relaxed);padding:var(--space-3);border-radius:var(--radius-xl);corner-shape:squircle;background:var(--hover-50);animation:hintReveal .3s ease-out}.quiz-help-bttn{gap:var(--space-1);align-self:flex-start;padding:var(--space-1) var(--space-2);margin-left:calc(var(--space-2) * -1);font-size:var(--text-xs);font-weight:500;color:var(--text-tertiary-color);box-shadow:none}.quiz-help-bttn svg{width:14px;height:14px;flex-shrink:0}.quiz-help-bttn:hover{color:var(--brand-color)}.quiz-nav{display:flex;align-items:center;justify-content:center;gap:var(--space-4);padding:var(--space-1) 0;position:relative}.quiz-dots{display:flex;gap:var(--space-2);align-items:center}.quiz-dot{width:7px;height:7px;border-radius:var(--radius-round);corner-shape:squircle;background:var(--text-tertiary-color);opacity:.3;cursor:pointer;transition:background .2s ease-out,opacity .2s ease-out,transform .2s var(--spring)}.quiz-dot.active{background:var(--brand-color);opacity:1;transform:scale(1.3)}.quiz-score{position:absolute;right:0;font-size:var(--text-xs);color:var(--text-tertiary-color)}.quiz-next,.quiz-prev{flex-shrink:0}.quiz-more-wrapper{display:flex;justify-content:center;padding:var(--space-2) 0}.quiz-more-bttn{display:flex;align-items:center;gap:var(--space-2);font-size:var(--text-sm);animation:hintReveal .3s ease-out}.quiz-more-bttn i{width:14px;height:14px}.regen{display:flex;gap:var(--space-5);align-items:center;justify-content:center;background-color:var(--brand-light);color:var(--text-primary-color);padding:var(--space-4);border-radius:var(--radius-lg);corner-shape:squircle;margin-bottom:var(--space-7)}.explained{border:solid 1px var(--active-green)}.explaining{position:relative;overflow:hidden;color:var(--text-primary-color)!important;cursor:not-allowed;opacity:1!important}.explaining::before{content:'';position:absolute;top:0;left:0;width:200%;height:100%;background:var(--phy-pro-gradient);mask:linear-gradient(100deg,transparent,rgba(255,255,255,0.75),transparent);animation:backgroundWave 2s linear infinite;z-index:1;pointer-events:none}.image-tool{display:flex;flex-direction:column;width:100%;margin:var(--space-4) 0}.image-card{position:relative;border-radius:var(--radius-2xl);corner-shape:squircle;background:var(--glass-bg);backdrop-filter:blur(var(--glass-blur));-webkit-backdrop-filter:blur(var(--glass-blur));border:none;box-shadow:var(--shadow-crisp),var(--glass-highlight);overflow:hidden;clip-path:inset(0 0 100% 0);transition:clip-path 1.6s cubic-bezier(.16, 1, .3, 1)}.image-card.revealed{clip-path:inset(0 0 0 0)}.generated-image{width:100%;max-height:512px;object-fit:contain;display:block;cursor:pointer;background:var(--input-bg)}.image-download.bttn.bttn-icon{position:absolute;top:var(--space-3);right:var(--space-3);background:var(--glass-bg)!important;backdrop-filter:blur(var(--glass-blur));-webkit-backdrop-filter:blur(var(--glass-blur));border:.5px solid var(--glass-border)!important;color:var(--text-primary-color);opacity:0;transform:translateY(var(--space-1));transition:opacity var(--duration-fast) ease-out,transform var(--duration-fast) ease-out,background var(--duration-fast) ease-out;z-index:1}.image-card:hover .image-download.bttn.bttn-icon{opacity:1;transform:translateY(0)}.image-download.bttn.bttn-icon:hover{background:var(--hover-100)!important}.image-caption{padding:var(--space-2) var(--space-1);font-size:var(--text-xs);color:var(--text-tertiary-color);line-height:var(--leading-relaxed)}.cortex-chip{display:inline-flex;align-items:center;gap:var(--space-2);width:fit-content;margin-top:var(--space-3);padding:var(--space-2) var(--space-4);border:none;box-shadow:var(--shadow-crisp);border-radius:var(--radius-full);corner-shape:squircle;font-size:var(--text-sm);font-weight:500;letter-spacing:.02em;color:var(--text-tertiary-color)}.cortex-chip svg{width:1.5rem;height:1.5rem;flex-shrink:0}.cortex-chip{position:relative;overflow:hidden;transition:padding .25s ease,font-size .25s ease}.cortex-chip-spinner{display:none}.cortex-chip-active{padding:var(--space-3) var(--space-5);font-size:var(--text-md)}.cortex-chip-active::after{content:'';position:absolute;inset:0;background:linear-gradient(105deg,transparent 25%,color-mix(in srgb,var(--contrast-color) 10%,transparent) 50%,transparent 75%);transform:translateX(-100%);animation:cortexShimmer 1.3s ease-in-out infinite;pointer-events:none}@keyframes cortexShimmer{to{transform:translateX(100%)}}.quiz-tool-header{justify-content:center}.quiz-tool-header .tool-title{text-align:center;color:var(--text-primary-color);font-weight:600;font-size:var(--text-plus);letter-spacing:0;text-transform:none}.steps-fan-icon svg{width:1.15rem;height:1.15rem;display:block}.steps-fan-icon svg path{transition:d .25s ease}.steps-fan-icon svg path:first-child{d:path("M7 5L17 5")}.steps-fan-icon svg path:nth-child(3){d:path("M7 19L17 19")}.steps-tool-header.expanded .steps-fan-icon svg path:first-child{d:path("M4 5L20 5")}.steps-tool-header.expanded .steps-fan-icon svg path:nth-child(3){d:path("M4 19L20 19")}