:root{--c-0: #ffffff;--c-50: #fafafa;--c-100: #f4f4f5;--c-150: #ececee;--c-200: #e4e4e7;--c-300: #d4d4d8;--c-400: #a1a1aa;--c-500: #71717a;--c-600: #52525b;--c-700: #3f3f46;--c-800: #27272a;--c-900: #18181b;--c-950: #0a0a0b;--color-primary: var(--c-950);--color-primary-hover: var(--c-800);--color-on-primary: #ffffff;--bg: #f3f3f4;--bg-tint: #fbfbfc;--ink: var(--c-950);--ink-soft: var(--c-700);--ink-muted: var(--c-500);--line: rgba(10, 10, 11, .1);--line-soft: rgba(10, 10, 11, .06);--glass-bg: rgba(255, 255, 255, .6);--glass-bg-strong: rgba(255, 255, 255, .82);--glass-border: rgba(255, 255, 255, .8);--glass-blur: 18px;--shadow-sm: 0 1px 2px rgba(10, 10, 11, .06);--shadow-md: 0 10px 30px -12px rgba(10, 10, 11, .2);--shadow-lg: 0 30px 60px -22px rgba(10, 10, 11, .32);--shadow-glow: 0 0 0 1px rgba(255, 255, 255, .5) inset, 0 16px 36px -16px rgba(10, 10, 11, .4);--font-display: "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;--font-sans: "Inter", system-ui, -apple-system, sans-serif;--font-ui: "Inter", system-ui, -apple-system, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, monospace;--radius-sm: 12px;--radius: 18px;--radius-lg: 26px;--radius-pill: 999px;--container: 1180px;--ease: cubic-bezier(.22, 1, .36, 1);--subj-p1: #18181b;--subj-p2: #3f3f46;--subj-p3: #52525b;--subj-p4: #27272a}*,*:before,*:after{box-sizing:border-box}*{margin:0}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:clip}body{font-family:var(--font-sans);color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:clip}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}img,svg{display:block}ul{list-style:none;padding:0}:focus-visible{outline:3px solid var(--c-950);outline-offset:3px;border-radius:6px}.bg-canvas{position:fixed;top:0;right:0;bottom:0;left:0;z-index:-2;background:radial-gradient(60% 55% at 12% 8%,rgba(10,10,11,.07),transparent 60%),radial-gradient(50% 50% at 92% 12%,rgba(10,10,11,.05),transparent 60%),radial-gradient(55% 60% at 78% 95%,rgba(10,10,11,.06),transparent 60%),linear-gradient(180deg,var(--bg-tint),var(--bg))}.bg-grid{position:fixed;top:0;right:0;bottom:0;left:0;z-index:-2;background-image:linear-gradient(rgba(10,10,11,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(10,10,11,.04) 1px,transparent 1px);background-size:46px 46px;-webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 35%,transparent 80%);mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 35%,transparent 80%)}.bg-blob{position:fixed;z-index:-1;border-radius:50%;filter:blur(70px);opacity:.6;animation:drift 22s var(--ease) infinite alternate}.bg-blob.b1{width:480px;height:480px;top:-120px;left:-100px;background:radial-gradient(circle,rgba(10,10,11,.1),transparent 70%)}.bg-blob.b2{width:420px;height:420px;top:30%;right:-120px;background:radial-gradient(circle,rgba(10,10,11,.08),transparent 70%);animation-delay:-7s}.bg-blob.b3{width:360px;height:360px;bottom:-120px;left:30%;background:radial-gradient(circle,rgba(10,10,11,.07),transparent 70%);animation-delay:-13s}@keyframes drift{0%{transform:translate(0) scale(1)}to{transform:translate(40px,-30px) scale(1.12)}}.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}section{position:relative;padding:96px 0}.section-head{max-width:680px;margin:0 auto 56px;text-align:center}.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.74rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-soft);background:var(--c-100);border:1px solid var(--line);padding:6px 14px;border-radius:var(--radius-pill);margin-bottom:18px}h1,h2,h3{font-family:var(--font-display);font-weight:700;line-height:1.08;letter-spacing:-.02em;color:var(--ink)}.section-head h2{font-size:clamp(2.1rem,4.2vw,3.1rem)}.section-head p{margin-top:16px;font-size:1.06rem;color:var(--ink-muted)}.glass{background:var(--glass-bg);backdrop-filter:blur(var(--glass-blur)) saturate(120%);-webkit-backdrop-filter:blur(var(--glass-blur)) saturate(120%);border:1px solid var(--glass-border);box-shadow:var(--shadow-md)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:600;font-size:.96rem;padding:13px 22px;border-radius:var(--radius-pill);transition:transform .2s var(--ease),box-shadow .25s var(--ease),background .2s var(--ease);white-space:nowrap}.btn:active{transform:scale(.97)}.btn-primary{color:var(--color-on-primary);background:var(--c-950);box-shadow:var(--shadow-glow)}.btn-primary:hover{transform:translateY(-2px);background:var(--c-800);box-shadow:0 20px 40px -16px #0a0a0b8c}.btn-ghost{background:var(--glass-bg-strong);border:1px solid var(--line);color:var(--ink);box-shadow:var(--shadow-sm)}.btn-ghost:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.btn-sm{padding:9px 16px;font-size:.86rem}.nav{position:fixed;top:14px;left:0;right:0;z-index:100;transition:top .3s var(--ease)}.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:11px 14px 11px 20px;border-radius:var(--radius-pill);background:#fff;transition:box-shadow .3s var(--ease),background .3s var(--ease)}.nav.scrolled .nav-inner{background:#fff;box-shadow:var(--shadow-lg)}.brand{display:flex;align-items:center;gap:11px;font-family:var(--font-display);font-size:1.3rem;font-weight:700;letter-spacing:-.03em}.brand-mark{width:34px;height:34px;border-radius:10px;flex-shrink:0}.brand .dot{color:var(--ink-muted)}.nav-links{display:flex;align-items:center;gap:6px}.nav-links a{padding:8px 14px;border-radius:var(--radius-pill);font-size:.93rem;font-weight:500;color:var(--ink-soft);transition:background .2s,color .2s}.nav-links a:hover{background:var(--c-100);color:var(--ink)}.nav-cta{display:flex;align-items:center;gap:8px}.nav-toggle{display:none;padding:8px;border-radius:10px}.hero{padding-top:168px;padding-bottom:60px;text-align:center}.hero-badge{display:inline-flex;align-items:center;gap:10px;padding:7px 8px 7px 16px;border-radius:var(--radius-pill);font-size:.86rem;font-weight:500;color:var(--ink-soft);margin-bottom:28px}.hero-badge .tag{background:var(--c-950);color:#fff;font-weight:600;font-size:.74rem;letter-spacing:.04em;padding:3px 10px;border-radius:var(--radius-pill)}.hero h1{font-size:clamp(2.7rem,6.4vw,4.8rem);max-width:15ch;margin:0 auto;line-height:1.16;padding-bottom:.12em}.hero h1 .grad{font-style:italic;background:linear-gradient(120deg,var(--c-950),var(--c-500));-webkit-background-clip:text;background-clip:text;color:transparent;display:inline-block;padding:0 .12em .08em 0}.hero-sub{max-width:60ch;margin:24px auto 0;font-size:clamp(1.05rem,2vw,1.2rem);color:var(--ink-soft)}.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:36px}.hero-trust{display:flex;gap:28px;justify-content:center;flex-wrap:wrap;margin-top:40px;color:var(--ink-muted);font-size:.9rem}.hero-trust span{display:inline-flex;align-items:center;gap:8px}.hero-trust svg{color:var(--ink)}.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.stat{padding:28px 24px;border-radius:var(--radius);text-align:center}.stat .num{font-family:var(--font-display);font-size:clamp(2.3rem,5vw,3.1rem);font-weight:800;line-height:1;color:var(--ink)}.stat .lbl{margin-top:8px;font-size:.92rem;color:var(--ink-muted);font-weight:500}.makers-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.maker{padding:30px 28px;border-radius:var(--radius-lg);text-align:left}.maker-icon{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;background:var(--c-950);color:#fff;margin-bottom:22px}.maker-stat{display:flex;align-items:baseline;gap:7px;font-family:var(--font-display);font-weight:800;font-size:clamp(2.3rem,4vw,2.9rem);line-height:1;letter-spacing:-.02em;color:var(--ink)}.maker-stat span{font-size:.95rem;font-weight:700;letter-spacing:.06em;color:var(--ink-muted)}.maker-title{font-size:1.15rem;margin-top:16px}.maker-note{margin-top:8px;font-size:.95rem;color:var(--ink-muted)}.cs-wrapper{display:flex;align-items:center;justify-content:center;position:relative;padding:8px;height:52rem}.cs-inner{width:100%;position:relative;padding:28px 0}.cs-header{max-width:64rem;margin:0 auto 24px;text-align:center}.cs-card{max-width:64rem;margin:1.5rem auto 0;height:30rem;width:100%;border:4px solid var(--c-600);padding:10px;background:var(--c-900);border-radius:30px;box-shadow:var(--shadow-lg)}.cs-card-inner{height:100%;width:100%;overflow:hidden;border-radius:18px;background:var(--c-100)}@media(min-width:768px){.cs-wrapper{height:72rem;padding:56px}.cs-inner{padding:100px 0}.cs-card{height:40rem;padding:22px}.cs-card-inner{border-radius:14px}}.paper-demo{display:flex;flex-direction:column;height:100%;width:100%;background:var(--c-100)}.paper-demo-bar{display:flex;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--line);background:var(--glass-bg-strong);flex-shrink:0}.paper-demo-title{font-size:.86rem;font-weight:600;color:var(--ink-soft);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.paper-demo-bar .solved-ribbon{margin-left:auto;flex-shrink:0}.paper-demo-frame{flex:1;width:100%;border:0;background:var(--c-200)}.hero-shot{position:relative;height:100%;width:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:clamp(18px,4vw,48px);overflow:hidden;background:radial-gradient(60% 60% at 50% 0%,rgba(10,10,11,.05),transparent 70%),linear-gradient(180deg,#ffffff,var(--c-100))}.hero-shot .grid-bg{position:absolute;top:0;right:0;bottom:0;left:0;z-index:0;background-image:linear-gradient(rgba(10,10,11,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(10,10,11,.045) 1px,transparent 1px);background-size:34px 34px;-webkit-mask-image:radial-gradient(ellipse 72% 64% at 50% 42%,#000 28%,transparent 82%);mask-image:radial-gradient(ellipse 72% 64% at 50% 42%,#000 28%,transparent 82%)}.hero-shot>*:not(.grid-bg){position:relative;z-index:1}.hero-shot .hs-badge{display:inline-flex;align-items:center;gap:8px;padding:5px 6px 5px 12px;border-radius:var(--radius-pill);font-size:clamp(.62rem,1.4vw,.82rem);font-weight:500;color:var(--ink-soft);background:var(--glass-bg-strong);border:1px solid var(--glass-border);box-shadow:var(--shadow-sm);margin-bottom:clamp(10px,2vw,18px)}.hero-shot .hs-badge .tag{background:var(--c-950);color:#fff;font-weight:600;font-size:.85em;padding:2px 8px;border-radius:var(--radius-pill)}.hero-shot h2{font-family:var(--font-display);font-weight:600;line-height:1.02;letter-spacing:-.02em;font-size:clamp(1.5rem,5.2vw,3.2rem);max-width:15ch}.hero-shot h2 .grad{font-style:italic;background:linear-gradient(120deg,var(--c-950),var(--c-500));-webkit-background-clip:text;background-clip:text;color:transparent}.hero-shot p{margin:clamp(8px,1.6vw,16px) auto 0;max-width:52ch;font-size:clamp(.78rem,1.7vw,1.05rem);color:var(--ink-soft)}.hero-shot .hs-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:clamp(14px,2.4vw,28px)}.hero-shot .hs-btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:clamp(.72rem,1.5vw,.92rem);padding:clamp(8px,1.4vw,12px) clamp(14px,2.4vw,20px);border-radius:var(--radius-pill)}.hero-shot .hs-btn.primary{background:var(--c-950);color:#fff;box-shadow:var(--shadow-glow)}.hero-shot .hs-btn.ghost{background:var(--glass-bg-strong);border:1px solid var(--line);color:var(--ink)}.hero-shot .hs-trust{display:flex;gap:clamp(12px,2.4vw,26px);justify-content:center;flex-wrap:wrap;margin-top:clamp(14px,2.4vw,30px);color:var(--ink-muted);font-size:clamp(.66rem,1.4vw,.86rem)}.hero-shot .hs-trust span{display:inline-flex;align-items:center;gap:6px}.lg-svg{position:absolute;width:0;height:0;pointer-events:none}.liquid-btn{position:relative;isolation:isolate;display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:9px 16px;border-radius:var(--radius-pill);font-family:inherit;font-size:.88rem;font-weight:600;color:var(--ink-soft);background:transparent;cursor:pointer;transition:transform .3s var(--ease),color .2s var(--ease)}.liquid-btn:hover{transform:scale(1.05);color:var(--ink)}.liquid-btn:active{transform:scale(.98)}.liquid-btn-rim{position:absolute;top:0;right:0;bottom:0;left:0;z-index:0;border-radius:inherit;pointer-events:none;box-shadow:0 0 6px #00000008,0 2px 6px #00000014,inset 3px 3px .5px -3px #000000e6,inset -3px -3px .5px -3px #000000d9,inset 1px 1px 1px -.5px #0009,inset -1px -1px 1px -.5px #0009,inset 0 0 6px 6px #0000001f,inset 0 0 2px 2px #0000000f,0 0 12px #ffffff26;transition:box-shadow .2s var(--ease),background .2s var(--ease)}.liquid-btn-distort{position:absolute;top:0;right:0;bottom:0;left:0;z-index:-1;border-radius:inherit;overflow:hidden;pointer-events:none;-webkit-backdrop-filter:url(#container-glass);backdrop-filter:url(#container-glass)}.liquid-btn-content{position:relative;z-index:1;display:inline-flex;align-items:center;gap:7px}.liquid-btn .count{font-size:.72rem;background:#0a0a0b14;padding:1px 7px;border-radius:var(--radius-pill);color:inherit}.liquid-btn.active{color:#fff}.liquid-btn.active .liquid-btn-rim{background:var(--c-950)}.liquid-btn.active .count{background:#ffffff40}.catalog-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:30px}.filter-group{display:flex;gap:8px;flex-wrap:wrap;padding:6px;border-radius:var(--radius-pill)}.chip{display:inline-flex;align-items:center;gap:7px;padding:9px 16px;border-radius:var(--radius-pill);font-size:.88rem;font-weight:600;color:var(--ink-soft);transition:all .2s var(--ease)}.chip:hover{color:var(--ink);background:var(--c-100)}.chip.active{color:#fff;background:var(--c-950);box-shadow:var(--shadow-glow)}.chip .count{font-size:.72rem;background:#0a0a0b14;padding:1px 7px;border-radius:var(--radius-pill)}.chip.active .count{background:#ffffff40}.search-box{display:flex;align-items:center;justify-content:flex-start;gap:10px;padding:11px 15px;border-radius:var(--radius-pill);width:50px;min-width:50px;overflow:hidden;cursor:pointer;transition:width .5s var(--ease),min-width .5s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease)}.search-box:hover,.search-box:focus-within{width:300px;min-width:300px;cursor:text}.search-box input{border:none;background:none;font-family:inherit;font-size:.92rem;color:var(--ink);width:100%;opacity:0;transition:opacity .25s var(--ease)}.search-box:hover input,.search-box:focus-within input{opacity:1}.search-box input::placeholder{color:var(--ink-muted)}.search-box svg{color:var(--ink-muted);flex-shrink:0}.paper-grid{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.paper-deck-cell{position:relative;z-index:var(--z, 1)}.paper-deck-cell:hover{z-index:300}.paper-deck-item{height:100%;will-change:transform}.paper{position:relative;display:flex;flex-direction:column;border-radius:var(--radius-lg);padding:24px;overflow:hidden;transition:transform .3s var(--ease),box-shadow .3s var(--ease)}.paper:before{content:"";position:absolute;inset:0 0 auto 0;height:5px;background:var(--accent, var(--color-primary))}.paper.live:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}.paper-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:16px}.subj-badge{display:inline-flex;align-items:center;gap:8px;padding:7px 13px;border-radius:var(--radius-pill);font-size:.8rem;font-weight:600;color:#fff;background:var(--accent, var(--color-primary))}.session-tag{font-size:.74rem;font-weight:600;color:var(--ink-muted);font-family:var(--font-mono);background:#0a0a0b0d;padding:5px 10px;border-radius:var(--radius-pill)}.paper h3{font-size:1.5rem;margin-bottom:4px}.paper .paper-meta{font-size:.9rem;color:var(--ink-muted);font-weight:500}.paper-topics{display:flex;flex-wrap:wrap;gap:6px;margin:16px 0 18px}.topic{font-size:.76rem;font-weight:500;color:var(--ink-soft);background:#0a0a0b0a;border:1px solid var(--line);padding:4px 10px;border-radius:var(--radius-pill)}.paper-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:16px;border-top:1px solid var(--line)}.paper-mini{display:flex;gap:16px;font-size:.82rem;color:var(--ink-muted);font-weight:500}.paper-mini span{display:inline-flex;align-items:center;gap:5px}.paper-actions{display:flex;gap:8px}.icon-btn{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:var(--glass-bg-strong);border:1px solid var(--line);color:var(--ink-soft);transition:all .2s var(--ease)}.icon-btn:hover{color:var(--ink);border-color:var(--c-400);transform:translateY(-2px)}.solved-ribbon{display:inline-flex;align-items:center;gap:6px;font-size:.76rem;font-weight:600;color:var(--ink);background:var(--c-150);border:1px solid var(--c-300);padding:4px 11px;border-radius:var(--radius-pill)}.paper.locked{background:#fff6;border-style:dashed}.paper.locked .paper-top,.paper.locked h3,.paper.locked .paper-meta{opacity:.55}.coming-soon{display:inline-flex;align-items:center;gap:7px;font-size:.86rem;font-weight:600;color:var(--ink-muted)}.display-card{position:relative;display:flex;flex-direction:column;min-height:13.5rem;height:100%;border-radius:var(--radius-lg);border:1px solid var(--line);padding:22px 24px;overflow:hidden;background:#fff;box-shadow:var(--shadow-sm)}.display-card:before{content:"";position:absolute;inset:0 auto 0 0;width:4px;background:var(--accent, var(--color-primary));opacity:.6}.display-card.is-locked{border-style:dashed;background:#fff6}.display-card-head{display:flex;align-items:center;gap:12px;margin-bottom:16px}.display-card-ribbon{position:absolute;top:18px;right:18px}.display-card-title{font-size:1.5rem;line-height:1.15;margin-bottom:6px}.display-card-desc{font-size:.9rem;color:var(--ink-muted);font-weight:500}.display-card-foot{display:flex;align-items:center;justify-content:flex-end;gap:8px;margin-top:auto;padding-top:18px}.display-card.is-locked .display-card-foot{justify-content:flex-start}#topical{padding-top:98px;padding-bottom:40px;font-family:var(--font-ui)}.topical-bar{position:relative;z-index:20;display:grid;grid-template-columns:1fr 1.4fr 1.5fr .8fr;gap:12px;align-items:end;padding:14px;border-radius:var(--radius-lg);margin-bottom:14px}.topical-select select:disabled{opacity:.5;cursor:not-allowed}.topical-field{display:flex;flex-direction:column;gap:7px;min-width:0}.topical-field-label{font-size:.74rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--ink-muted);padding-left:2px}.topical-select{position:relative;display:flex;align-items:center}.topical-select select{-moz-appearance:none;appearance:none;-webkit-appearance:none;width:100%;font-family:inherit;font-size:.92rem;font-weight:500;color:var(--ink);background:var(--glass-bg-strong);border:1px solid var(--line);border-radius:var(--radius-pill);padding:12px 38px 12px 16px;cursor:pointer;transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}.topical-select select:hover{border-color:var(--c-400)}.topical-select select:focus-visible{outline:none;border-color:var(--ink);box-shadow:0 0 0 3px var(--c-150)}.topical-select svg{position:absolute;right:14px;color:var(--ink-muted);pointer-events:none}.topical-multi{position:relative}.topical-multi-trigger{display:flex;align-items:center;justify-content:space-between;gap:8px;width:100%;font-family:inherit;font-size:.92rem;font-weight:500;color:var(--ink);background:var(--glass-bg-strong);border:1px solid var(--line);border-radius:var(--radius-pill);padding:12px 14px 12px 16px;cursor:pointer;transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}.topical-multi-trigger:hover{border-color:var(--c-400)}.topical-multi-trigger:disabled{opacity:.5;cursor:not-allowed}.topical-multi-label{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topical-multi-trigger svg{color:var(--ink-muted);flex-shrink:0}.topical-multi-panel{position:absolute;top:calc(100% + 6px);left:0;right:0;z-index:40;background:#fff;border:1px solid var(--c-300);border-radius:14px;box-shadow:var(--shadow-lg);padding:6px;max-height:320px;overflow-y:auto}.topical-multi-opt{display:flex;align-items:center;gap:10px;width:100%;text-align:left;border:none;background:none;cursor:pointer;font-family:inherit;font-size:.9rem;color:var(--ink);padding:9px 10px;border-radius:9px;transition:background .15s var(--ease)}.topical-multi-opt:hover{background:var(--c-100)}.topical-check{display:grid;place-items:center;width:18px;height:18px;flex-shrink:0;border:1.5px solid var(--c-300);border-radius:5px;color:#fff}.topical-check.on{background:var(--c-900);border-color:var(--c-900)}.topical-workspace{display:grid;grid-template-columns:250px 1px 1fr;border-radius:var(--radius-lg);overflow:hidden;height:90vh;min-height:640px;background:var(--c-150);border:1px solid 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