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32px;--button-height-md: 40px;--button-height-lg: 48px;--opacity-disabled: .5;--opacity-muted: .7;--opacity-hover: .9;--header-bg: rgba(10, 10, 15, .8);--header-shadow: 0 1px 0 rgba(255, 255, 255, .03), 0 4px 24px rgba(0, 0, 0, .3);--capability-icon-color: var(--primary-light);--modal-overlay-bg: rgba(0, 0, 0, .7)}[data-theme=light]{--primary-color: #2563eb;--primary-hover: #1d4ed8;--primary-light: #3b82f6;--primary-dark: #1e40af;--primary-glow: rgba(37, 99, 235, .3);--secondary-color: #64748b;--secondary-hover: #475569;--secondary-light: #94a3b8;--accent-color: #0ea5e9;--accent-hover: #0284c7;--accent-light: #38bdf8;--success-color: #10b981;--warning-color: #f59e0b;--error-color: #ef4444;--info-color: #0ea5e9;--error-message-bg: #fef2f2;--error-message-text: #b91c1c;--error-message-border: rgba(239, 68, 68, .5);--bg-primary: #ffffff;--bg-secondary: #f8fafc;--bg-tertiary: #f1f5f9;--bg-elevated: #ffffff;--bg-hover: #f1f5f9;--bg-card: #ffffff;--bg-card-hover: #f8fafc;--bg-input: 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var(--primary-glow);--shadow-glow-lg: 0 0 30px var(--primary-glow), 0 0 60px rgba(37, 99, 235, .15);--header-bg: rgba(255, 255, 255, .9);--header-shadow: 0 1px 3px rgba(0, 0, 0, .08), 0 2px 8px rgba(0, 0, 0, .04)}html.preload,html.preload *,html.preload *:before,html.preload 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ease-out}.hero-flash-logo-img{width:100%;height:100%;object-fit:contain;max-width:100%;max-height:100%;opacity:.2;filter:brightness(1.5) contrast(1.2) hue-rotate(-10deg)}[data-theme=light] .hero-flash-logo-img{opacity:.35;filter:brightness(2) contrast(1.1) hue-rotate(-10deg)}.hero-title-first-line,.hero-title-second-line{display:inline}.hero-content{max-width:1400px;margin:0 auto;position:relative;z-index:2;width:100%;animation:fadeInUp .8s ease-out both}.hero-title{font-size:clamp(2.5rem,6vw,4rem);font-weight:var(--font-extrabold);margin-bottom:1rem;line-height:1.1;letter-spacing:-.03em;background:linear-gradient(135deg,#fff,#e2e8f0,#22d3ee,#a78bfa,#fff);background-size:200% 200%;-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;animation:gradientShift 8s ease-in-out infinite;will-change:background-position;transform:translateZ(0);backface-visibility:hidden}.hero-subtitle{font-size:clamp(1.1rem,2.5vw,1.4rem);color:var(--text-secondary);margin-bottom:2.5rem;line-height:1.6;font-weight:var(--font-normal);max-width:700px;margin-left:auto;margin-right:auto;animation:fadeInUp .8s ease-out .1s both}[data-theme=light] .hero-section .hero-subtitle,[data-theme=light] .hero-section .hero-input-section h2,[data-theme=light] .hero-section .capability-title,[data-theme=light] .hero-section .capability-description{color:var(--hero-text-color)}.hero-subtitle-first-line,.hero-subtitle-second-line{display:inline}.hero-subtitle-second-line{white-space:normal}.hero-capabilities{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem;max-width:900px;margin:0 auto 2.5rem;padding:0 1rem;animation:fadeInUp .8s ease-out .2s both;position:relative}.hero-capabilities:has(.flipped){z-index:100}.capability-tile-wrapper{perspective:1200px;position:relative}.capability-tile-wrapper:has(.flipped){z-index:100}.capability-tile{border:1px solid rgba(255,255,255,.08);border-radius:20px;padding:1.5rem 1.25rem;text-align:center;transition:transform .7s cubic-bezier(.4,0,.2,1),box-shadow .7s cubic-bezier(.4,0,.2,1),border-color .7s cubic-bezier(.4,0,.2,1);box-shadow:0 4px 24px #0003,inset 0 1px #ffffff0d;position:relative;overflow:visible;cursor:pointer;transform-style:preserve-3d}.capability-tile.flipped{transform:rotateY(180deg) scale(2.4);transform-origin:center center;z-index:200;border-color:#06b6d466;box-shadow:0 20px 60px #00000080,0 0 50px #06b6d433,inset 0 1px #ffffff1a}.hero-capabilities.lightbox-open 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.capability-tile-back{opacity:1;pointer-events:auto}.capability-tile-back-label-row{display:flex;align-items:center;justify-content:center;gap:.35rem;flex-shrink:0;width:100%;font-size:.45rem}.capability-tile-back-label{font-size:.45rem;font-weight:var(--font-semibold);color:var(--primary-light);margin:0;text-transform:uppercase;letter-spacing:.08em;flex-shrink:0;line-height:1}.capability-tile-enlarge-btn{flex-shrink:0;padding:0;font-size:inherit;display:inline-flex;align-items:center;justify-content:center;background:none;border:none;color:var(--primary-light, #22d3ee);cursor:pointer;transform:scale(1);will-change:transform;transition:transform .35s cubic-bezier(.34,1.56,.64,1),color .25s ease,filter .25s ease}.capability-tile-enlarge-btn:hover{transform:scale(1.5);color:#fff;filter:drop-shadow(0 0 4px rgba(6,182,212,.7))}.capability-tile-enlarge-btn:active{transform:scale(1.25);transition:transform .1s ease}[data-theme=light] .capability-tile-enlarge-btn{color:var(--primary-color)}[data-theme=light] .capability-tile-enlarge-btn:hover{transform:scale(1.5);color:var(--primary-dark, #1e40af);filter:drop-shadow(0 0 4px rgba(37,99,235,.6))}[data-theme=light] .capability-tile-enlarge-btn:active{transform:scale(1.25);transition:transform .1s ease}.capability-tile-enlarge-btn svg{width:1em;height:1em}.capability-tile-back-image-wrap{width:100%;flex:1;min-height:0;display:flex;align-items:center;justify-content:center;background:#0f172af2;border-radius:8px;border:1px solid rgba(255,255,255,.12);overflow:hidden}.capability-tile-back-image{width:100%;height:100%;flex:1;min-height:0;object-fit:contain}.capability-tile-back[data-tile=natural-language] .capability-tile-back-image,.capability-tile-back[data-tile=formatted-math] .capability-tile-back-image{filter:brightness(.88) contrast(1.12)}.capability-tile-back-text{font-size:.35rem;line-height:1.3;color:#e2e8f0f2;margin:0;text-align:center;flex-shrink:0}[data-theme=light] .capability-tile-back{background:#f8fafcd1;border:1px solid rgba(0,0,0,.08)}[data-theme=light] .capability-tile-back-label{color:var(--primary-color)}[data-theme=light] .capability-tile-back-text{color:var(--text-secondary)}[data-theme=light] .capability-tile-back-image-wrap{background:#f1f5f9d9;border:1px solid rgba(0,0,0,.1)}[data-theme=light] .capability-tile-back[data-tile=natural-language] .capability-tile-back-image,[data-theme=light] .capability-tile-back[data-tile=formatted-math] .capability-tile-back-image{filter:brightness(1) contrast(1.02)}.capability-tile-image-lightbox{position:fixed;inset:0;z-index:var(--z-modal);display:flex;align-items:center;justify-content:center;background:#000000bf;cursor:pointer;animation:capability-tile-lightbox-fade-in .2s ease-out}[data-theme=light] .capability-tile-image-lightbox{background:#0000008c}@keyframes capability-tile-lightbox-fade-in{0%{opacity:0}to{opacity:1}}.capability-tile-image-lightbox-img{max-width:90vw;max-height:90vh;object-fit:contain;cursor:pointer;border-radius:12px;box-shadow:0 25px 80px #00000080;pointer-events:none}[data-theme=light] .capability-tile.flipped{border-color:#2563eb59;box-shadow:0 20px 60px #0000001f,0 0 40px #2563eb26,inset 0 1px #fffc}.capability-tile:before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,#06b6d41a,#8b5cf61a);opacity:0;transition:opacity .3s ease;border-radius:20px}@media(hover:hover)and (pointer:fine){.capability-tile:not(.flipped):hover{transform:translateY(-4px);border-color:#06b6d44d;box-shadow:0 12px 40px #0000004d,0 0 30px #06b6d41a,inset 0 1px #ffffff1a}.capability-tile:not(.flipped):hover:before{opacity:1}}@media(hover:none),(pointer:coarse){.capability-tile:not(.flipped):hover,.capability-tile:not(.flipped):active,.capability-tile:not(.flipped):focus{transform:translateY(0)!important;border-color:#ffffff14!important;box-shadow:0 4px 24px #0003,inset 0 1px #ffffff0d!important}.capability-tile:not(.flipped):hover:before,.capability-tile:not(.flipped):active:before,.capability-tile:not(.flipped):focus:before{opacity:0!important}}@keyframes tileTap{0%{transform:translateY(0)}40%{transform:translateY(-4px)}to{transform:translateY(0)}}.capability-tile.tap-animate{animation:tileTap .3s var(--ease-spring) forwards}.capability-tile.tap-animate:before{opacity:.5}.capability-icon{width:60px;height:60px;margin:0 auto 1rem;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#06b6d433,#8b5cf633);border-radius:16px;color:var(--capability-icon-color);transition:all .3s ease;position:relative;z-index:1}.capability-icon svg{width:24px;height:24px}@media(hover:hover)and (pointer:fine){.capability-tile:not(.flipped):hover .capability-icon{transform:scale(1.1);background:linear-gradient(135deg,#06b6d44d,#8b5cf64d);box-shadow:0 0 20px #06b6d44d}}@keyframes iconTap{0%{transform:scale(1)}40%{transform:scale(1.1)}to{transform:scale(1)}}.capability-tile.tap-animate .capability-icon{animation:iconTap .3s var(--ease-spring) forwards}.capability-title{font-size:1rem;font-weight:var(--font-semibold);color:var(--text-primary);margin-bottom:.5rem;line-height:1.3;position:relative;z-index:1}.capability-description{font-size:.8rem;color:var(--text-secondary);line-height:1.5;margin:0;position:relative;z-index:1}.capability-tooltip{display:none}@media(max-width:768px){.capability-tooltip{display:block;position:absolute;bottom:100%;left:50%;transform:translate(-50%) translateY(-8px);background:var(--bg-elevated);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);color:var(--text-primary);padding:12px 16px;border-radius:12px;font-size:.875rem;font-weight:var(--font-medium);white-space:normal;max-width:min(280px,calc(100vw - 32px));width:auto;min-width:120px;text-align:center;word-wrap:break-word;overflow-wrap:break-word;line-height:1.5;opacity:0;visibility:hidden;transition:all .3s var(--ease-spring);pointer-events:none;z-index:1000;box-shadow:var(--shadow-xl);border:1px solid var(--border-color);margin-bottom:10px}.capability-tooltip:after{content:"";position:absolute;top:100%;left:50%;transform:translate(-50%);border-width:8px;border-style:solid;border-color:var(--bg-elevated) transparent transparent transparent}.capability-tooltip.visible{opacity:1;visibility:visible;transform:translate(-50%) translateY(-12px)}}.hero-input-section{margin-top:1.5rem;max-width:700px;margin-left:auto;margin-right:auto;display:flex;flex-direction:column;gap:.75rem;animation:fadeInUp .8s ease-out .3s both}.hero-input-section>*{flex-shrink:0}.hero-input-section h2{font-size:clamp(1.25rem,3vw,1.5rem);font-weight:var(--font-bold);color:var(--text-primary);text-align:center;margin:0;letter-spacing:-.025em}.hero-input-section .select-models-heading-link{font:inherit;color:inherit;letter-spacing:inherit;background:none;border:none;padding:0;cursor:pointer;text-decoration:none;transition:text-decoration-color .2s ease}.hero-input-section .select-models-heading-link:hover{text-decoration:underline;text-underline-offset:.2em}.follow-up-header{flex-shrink:0;min-height:2rem;display:flex;align-items:center;justify-content:center;visibility:visible;opacity:1}.composer{position:relative;display:flex;flex-direction:column;align-items:stretch;width:100%;min-height:60px;overflow:visible;border-radius:1.5rem;box-shadow:0 0 0 1px #06b6d426,0 0 20px #06b6d414,0 0 40px #06b6d40a;transition:box-shadow .3s var(--ease-spring);isolation:isolate;z-index:1;transform:translateZ(0);backface-visibility:hidden;background:var(--bg-card, #12121c)}.composer:hover{box-shadow:0 0 0 1px #06b6d440,0 0 25px #06b6d41f,0 0 50px #06b6d40f}.composer-floating-wrapper{position:fixed;bottom:16px;left:50%;transform:translate(-50%);width:100%;max-width:700px;padding:0 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fadeInUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.verification-success-content{padding:1.5rem 2rem;flex:1;text-align:center}.verification-success-message{font-size:1.0625rem;line-height:1.6;color:var(--text-secondary);margin:0 0 1.5rem}.verification-success-features{background:var(--bg-elevated);border-radius:var(--radius-xl);padding:1.25rem;border:1px solid var(--border-color);text-align:left}.verification-success-features h3{margin:0 0 1rem;font-size:1rem;font-weight:600;color:var(--accent-light)}.verification-success-features ul{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:.75rem}.verification-success-features li{display:flex;align-items:center;gap:.75rem;font-size:.9375rem;color:var(--text-secondary)}.verification-success-features .feature-icon{font-size:1.25rem;flex-shrink:0}.verification-success-footer{padding:1rem 2rem 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