@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;450;500;550;600;650;700;750;800&display=swap');
:root{--accent:#2463eb;--accent-hover:#174ccd;--accent-soft:#eef4ff;--ink:#14243e;--muted:#5e6f86;--border:#dfe7f2;--page:#f7f9fd;--surface:#fff;--radius:16px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:var(--page);font-family:Inter,Arial,sans-serif;font-size:17px;color:var(--ink);-webkit-font-smoothing:antialiased}a{text-decoration:none;color:inherit}button,input{font:inherit}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #91b4ff;outline-offset:4px}header{background:white;border-bottom:1px solid var(--border)}.header-inner{max-width:1440px;margin:auto;padding:0 40px;height:88px;display:flex;align-items:center;gap:30px}.brand{display:flex;align-items:center;font-weight:750;font-size:30px;letter-spacing:-1.3px}.logo{display:grid;grid-template-columns:repeat(2,10px);gap:4px;background:var(--accent);padding:10px;border-radius:11px;margin-right:12px;transform:rotate(-3deg)}.logo i{width:10px;height:10px;background:white;border-radius:2px}.logo i:last-child{opacity:.45}.wordmark-dot{color:var(--accent)}.header-label{font-size:11px;letter-spacing:1.3px;color:#64758e;border-left:1px solid var(--border);padding-left:25px}.header-link{margin-left:auto;font-size:14px;font-weight:550;color:var(--accent)}.header-link span{margin-left:10px}.preview{border:1px solid var(--border);border-radius:6px;color:#65768e;font-size:12px;padding:8px 10px}.hero{max-width:1440px;margin:auto;display:grid;grid-template-columns:1.15fr 1fr;align-items:center;gap:18px;padding:68px 50px 62px;overflow:hidden;min-height:580px}.hero-kicker{display:flex;align-items:center;gap:9px;font-size:12px;letter-spacing:1.5px;font-weight:600;color:#536e94}.hero h1{font-size:clamp(40px,4.3vw,65px);line-height:1.08;letter-spacing:-3px;font-weight:750;margin:23px 0 25px}.hero h1 span{color:var(--accent)}.hero-copy>p{font-size:18px;line-height:1.7;color:var(--muted);max-width:560px;margin:0 0 28px}.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:21px}.hero-primary{display:flex;align-items:center;gap:22px;background:var(--accent);color:white;font-size:15px;font-weight:600;padding:18px 21px;border-radius:9px;box-shadow:0 7px 0 #174cca,0 16px 28px #2463eb25;transition:transform .2s,box-shadow .2s}.hero-primary:hover{transform:translateY(-2px);box-shadow:0 9px 0 #174cca,0 20px 28px #2463eb25}.hero-secondary{font-size:14px;font-weight:600;display:flex;gap:15px;padding:17px 0}.hero-proof{font-size:12px;color:#667b98;margin-top:26px}.hero-visual{position:relative;min-width:0;height:420px}.scene{height:380px;position:relative;perspective:800px}.halo{position:absolute;border:1px solid #d9e5fc;border-radius:50%;width:350px;height:290px;left:45px;top:46px;transform:rotate(-28deg)}.halo-b{width:420px;height:220px;left:10px;top:90px;transform:rotate(25deg);border-style:dashed}.floor-shadow{position:absolute;width:230px;height:40px;background:#1659e323;filter:blur(17px);left:115px;top:315px;border-radius:50%}.cube{position:absolute;width:150px;height:150px;left:145px;top:143px;transform-style:preserve-3d;transform:rotateX(-24deg) rotateY(-31deg);animation:cube-float 7s ease-in-out infinite}.cube-front{position:absolute;inset:0;display:grid;grid-template-columns:repeat(2,40px);gap:12px;place-content:center;background:linear-gradient(130deg,#3680ff,#1c55dd);border:1px solid #4b8bff;border-radius:15px;transform:translateZ(75px);box-shadow:inset 2px 2px 6px #ffffff50}.cube-front i{width:40px;height:40px;background:linear-gradient(130deg,#fff,#d0e1ff);border-radius:9px;box-shadow:0 5px 4px #143c8a35}.cube-front i:last-child{opacity:.55}.cube-top,.cube-side{position:absolute;inset:0;border-radius:15px;background:linear-gradient(120deg,#8cbbff,#4a8bfd);border:1px solid #91bdff}.cube-top{transform:rotateX(90deg) translateZ(75px)}.cube-side{background:linear-gradient(#2364e9,#123999);transform:rotateY(90deg) translateZ(75px)}.float-tile{position:absolute;background:linear-gradient(135deg,#fff,#eaf1ff);border:1px solid #fff;border-radius:18px;box-shadow:3px 8px 0 #d5e1f5,8px 18px 30px #375c9e16;display:flex;flex-direction:column;align-items:flex-start;justify-content:center;padding:20px;gap:8px;font-size:13px;font-weight:550;color:#51719f;animation:tile-float 6s ease-in-out infinite}.tile-one{width:140px;height:120px;left:4px;top:44px;transform:rotate(-12deg);--tilt:-12deg;animation-delay:-2s}.tile-two{width:150px;height:157px;right:8px;top:24px;transform:rotate(12deg);--tilt:12deg;animation-delay:-4s}.tile-three{width:162px;height:102px;right:0;bottom:12px;transform:rotate(-7deg);--tilt:-7deg}.tile-symbol{font:36px Arial,sans-serif;color:#3975e9}.tile-three .tile-symbol{font-size:26px}.little-blanket{height:67px;width:71px;border:4px solid white;box-shadow:0 4px 5px #5078b326;border-radius:4px;background:repeating-linear-gradient(0deg,transparent 0,transparent 3px,#ffffff22 3px,#ffffff22 4px),linear-gradient(#91b8ff 0 35%,#d5e4ff 35% 60%,#487de3 60%);transform:rotate(-7deg);margin-bottom:7px}.sphere{position:absolute;border-radius:50%;background:radial-gradient(circle at 30% 25%,#dbe9ff 0%,#7aafff 30%,#2266ec 65%,#133b93 100%);box-shadow:0 14px 15px #1b51ae20;animation:sphere-float 8s ease-in-out infinite}.sphere-one{width:50px;height:50px;left:27px;bottom:33px}.sphere-two{width:25px;height:25px;right:8px;top:207px;animation-delay:-4s}.spark{position:absolute;color:#8eb3f2;font:35px Arial,sans-serif}.spark-one{left:196px;top:1px}.spark-two{left:92px;bottom:0;font-size:25px}.motion-toggle{position:absolute;bottom:0;left:25px;background:transparent;border:1px solid #ccd9ed;border-radius:50px;padding:8px 12px;font-size:12px;color:#4f6a91;display:flex;gap:9px}.visual-caption{position:absolute;bottom:10px;right:2px;font-size:11px;color:#7085a3}.ribbon{background:#edf3ff;border-top:1px solid #dce7fc;border-bottom:1px solid #dce7fc;padding:22px 40px;text-align:center}.ribbon>div{display:flex;justify-content:center;gap:25px;font-size:13px;font-weight:650;letter-spacing:1.2px;flex-wrap:wrap;color:#3c68b2}.ribbon b{color:#9fbbef;font-weight:400}.ribbon p{font-size:12px;color:#647fa9;margin:12px 0 0}.app-layout{max-width:1440px;margin:auto;display:grid;grid-template-columns:250px minmax(0,1fr)}aside{padding:43px 20px 30px 26px;border-right:1px solid var(--border);background:#fff;display:flex;flex-direction:column}.sidebar-title{font-size:12px;font-weight:650;letter-spacing:1.4px;color:#687b96;margin:0 13px 20px}nav{display:flex;flex-direction:column;gap:7px}nav button{border:0;background:none;color:#556882;display:flex;align-items:center;text-align:left;padding:14px 12px;border-radius:8px;font-size:14px;font-weight:500;gap:10px}nav button.selected{color:var(--accent);background:var(--accent-soft);font-weight:650}nav button:hover{background:#f1f5fa}.nav-icon{font:20px Arial,sans-serif;width:20px;text-align:center}nav small{margin-left:auto;font-size:12px;color:#6b83a6}.sidebar-note{border:1px solid var(--border);border-radius:12px;margin:45px 4px 0;padding:19px 15px}.note-icon{color:var(--accent);font-size:29px;margin-bottom:17px}.sidebar-note strong{font-size:15px;font-weight:600;display:block;line-height:1.5}.sidebar-note p{font-size:13px;line-height:1.8;color:var(--muted);margin:11px 0 16px}.sidebar-note a{font-size:12px;color:var(--accent)}.sidebar-bottom{font-size:12px;color:#60738e;display:flex;align-items:center;gap:8px;margin:28px 12px}.live-dot{display:inline-block;background:#269b79;width:6px;height:6px;border-radius:50%;flex-shrink:0}main{padding:43px 36px 0;min-width:0}.breadcrumb{font-size:12px;letter-spacing:1.6px;font-weight:600;color:#6a7d97}.directory-title{font-size:34px;line-height:1.2;font-weight:650;letter-spacing:-1px;margin:15px 0 12px}.intro>p{font-size:16px;line-height:1.7;color:var(--muted);margin:0 0 24px}.search{display:flex;align-items:center;gap:13px;background:var(--surface);padding:18px 19px;border:1px solid #cfdbee;border-radius:10px;box-shadow:0 4px 12px #132d5604;color:#6e83a2}.search:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px #2463eb0d}.search input{flex:1;min-width:0;border:0;background:none;outline:none;color:var(--ink);font-size:17px}.search input::placeholder{color:#71829a}kbd{border:1px solid var(--border);border-radius:4px;padding:2px 7px;font-size:13px;background:#fafbfd}.search-meta{display:flex;justify-content:space-between;align-items:center;margin-top:14px;font-size:12px;color:#647790;gap:16px}.search-meta label{display:flex;align-items:center;gap:7px;white-space:nowrap}.search-meta input{accent-color:var(--accent);width:17px;height:17px;margin:0}.directory-heading{display:flex;align-items:center;justify-content:space-between;margin:37px 0 22px;gap:10px}.directory-heading h2{font-size:25px;letter-spacing:-.4px;font-weight:600;margin:0}.directory-heading>span{font-size:13px;color:#60728d}.shelf-label{display:flex;gap:8px;align-items:center;margin-bottom:13px}.shelf-label h3{font-size:12px;letter-spacing:1.2px;font-weight:600;color:#5d728f;margin:0}.featured{display:grid;grid-template-columns:1fr 180px;background:#fff;border:1px solid #cddcf8;border-radius:var(--radius);overflow:hidden}.featured-copy{padding:28px}.tool-category{font-size:13px;color:#60789b;margin-bottom:14px}.feature-title{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.feature-title h3{font-size:27px;letter-spacing:-.7px;font-weight:600;margin:0}.badge{color:#26735b;background:#ecf8f1;border:1px solid #d9eee3;padding:5px 7px;font-size:10px;letter-spacing:.3px;border-radius:5px}.featured p{font-size:16px;line-height:1.7;color:var(--muted);max-width:450px;margin:15px 0 22px}.open-tool{display:inline-flex;align-items:center;gap:25px;background:var(--accent);color:#fff;padding:14px 18px;border-radius:8px;font-size:15px;font-weight:550}.open-tool:hover{background:var(--accent-hover)}.feature-art{background:#edf3ff;position:relative;display:grid;place-items:center;overflow:hidden}.feature-art::before{content:'';position:absolute;width:250px;height:250px;border:1px solid #dce7fd;border-radius:50%;left:40px;top:20px}.mini-blanket{width:112px;height:150px;transform:rotate(10deg);border:5px solid white;border-radius:5px;box-shadow:0 8px 25px #3763b125;background:repeating-linear-gradient(0deg,transparent 0,transparent 3px,#ffffff24 3px,#ffffff24 4px),linear-gradient(#a7c4ff 0 28%,#e1eaff 28% 50%,#5685e4 50% 70%,#b8d0ff 70%);position:relative}.mini-label{position:absolute;bottom:24px;right:18px;background:white;border:1px solid #e3ebfc;padding:7px 9px;font-size:10px;font-weight:550;color:#5b74a0;border-radius:5px}.concept-heading{display:flex;justify-content:space-between;align-items:center;margin:33px 0 20px;gap:16px}.concept-heading h3{font-size:22px;font-weight:600;letter-spacing:-.3px;margin:0 0 9px}.concept-heading p{font-size:14px;color:#63768f;margin:0;line-height:1.6}.concept-count{background:#edf0f5;color:#5f738f;border-radius:5px;padding:6px 9px;font-size:12px;white-space:nowrap}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px}.card{padding:24px;background:white;border:1px solid var(--border);border-radius:12px;min-height:255px;display:flex;flex-direction:column}.card-top{display:flex;align-items:center;justify-content:space-between;gap:7px}.tool-icon{width:42px;height:42px;display:grid;place-items:center;color:#5276b5;background:#f1f5fc;border-radius:10px;font:24px Arial,sans-serif}.status{font-size:11px;letter-spacing:.5px;color:#5e6f86}.card h3{font-size:20px;letter-spacing:-.4px;margin:21px 0 12px;font-weight:600}.card p{font-size:15px;line-height:1.7;color:#60728b;margin:0 0 19px}.card-bottom{margin-top:auto;padding-top:14px;border-top:1px solid #e8edf5;display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap;font-size:11px;color:#5e6f86}.about{border-top:1px solid var(--border);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:18px;margin-top:38px;padding:30px 0}.about-icon{background:#eaf1ff;color:var(--accent);width:45px;height:45px;border-radius:11px;display:grid;place-items:center;font-size:23px;font-weight:600;flex-shrink:0}.about h2{font-size:18px;font-weight:600;margin:0 0 9px}.about p{font-size:14px;color:#60738d;line-height:1.8;max-width:520px;margin:0}.about a{font-size:13px;color:var(--accent);margin-left:auto;white-space:nowrap}footer{display:flex;justify-content:space-between;gap:20px;font-size:11px;color:#5e6f86;padding:24px 0 30px}.empty{padding:50px 20px;text-align:center;border:1px dashed #ccd8eb;background:#fff;border-radius:12px}.empty-icon{font-size:40px;color:#7c94bb}.empty h3{font-size:23px;font-weight:550}.empty p{font-size:16px;color:var(--muted)}.empty button{border:0;background:var(--accent);color:white;border-radius:8px;padding:14px 19px;font-size:15px;margin-top:10px}[hidden]{display:none!important}@keyframes cube-float{0%,100%{transform:translateY(0) rotateX(-24deg) rotateY(-31deg)}50%{transform:translateY(-13px) rotateX(-21deg) rotateY(-24deg)}}@keyframes tile-float{0%,100%{transform:translateY(0) rotate(var(--tilt))}50%{transform:translateY(-12px) rotate(calc(var(--tilt) + 3deg))}}@keyframes sphere-float{0%,100%{transform:translateY(0)}50%{transform:translateY(-17px)}}body.motion-paused .scene *{animation-play-state:paused!important}@media(max-width:1150px){.header-label{display:none}.hero{padding:50px 35px;grid-template-columns:1.15fr 1fr}.hero h1{font-size:46px;letter-spacing:-2px}.hero-copy>p{font-size:17px}.hero-actions{gap:12px}.hero-visual{transform:scale(.87);transform-origin:center;}.visual-caption{display:none}.app-layout{grid-template-columns:224px minmax(0,1fr)}aside{padding-left:12px;padding-right:12px}nav button{font-size:13px;gap:7px}main{padding:36px 28px 0}.featured{grid-template-columns:1fr 125px}.featured-copy{padding:25px}.feature-title h3{font-size:24px}.feature-art .mini-blanket{width:85px;height:120px}.mini-label{font-size:9px;right:7px}.about a{display:none}.card{padding:21px}.card h3{font-size:19px}.card-bottom{font-size:11px}}@media(max-width:860px){.hero{grid-template-columns:1fr;padding:43px 28px 32px}.hero h1{font-size:54px;max-width:650px}.hero-copy>p{max-width:590px}.hero-visual{width:440px;max-width:100%;margin:10px auto 0;transform:scale(.92);height:400px}.hero-actions{gap:24px}.app-layout{display:flex;flex-direction:column}aside{display:block;border:0;background:var(--page);padding:25px 24px 0}.sidebar-title,.sidebar-note,.sidebar-bottom{display:none}nav{flex-direction:row;flex-wrap:wrap;gap:9px}nav button{border:1px solid var(--border);background:white;border-radius:7px;padding:11px 13px;font-size:14px;gap:7px}nav button.selected{border-color:#b8d0fd}nav small{display:none}.nav-icon{font-size:17px;width:16px}main{padding:30px 24px 0}.ribbon{padding:21px 24px}.ribbon>div{gap:15px;font-size:11px}.ribbon>div span:last-child,.ribbon b:last-of-type{display:none}.ribbon p{font-size:12px}.header-inner{padding:0 25px}.preview{font-size:11px}}@media(max-width:520px){.header-inner{height:76px;padding:0 20px;gap:10px}.brand{font-size:27px}.logo{padding:9px;grid-template-columns:repeat(2,9px);gap:3px}.logo i{width:9px;height:9px}.header-link{display:none}.preview{margin-left:auto;font-size:10px}.hero{padding:35px 21px 22px;gap:10px}.hero-kicker{font-size:10px;letter-spacing:1px}.hero h1{font-size:42px;letter-spacing:-1.9px;line-height:1.12;margin:19px 0}.hero-copy>p{font-size:17px;line-height:1.7;margin-bottom:24px}.hero-copy>p br{display:none}.hero-actions{gap:10px;flex-direction:column;align-items:flex-start}.hero-primary{font-size:14px;padding:17px 18px;gap:21px}.hero-secondary{font-size:14px;padding:14px 0}.hero-proof{font-size:12px;line-height:1.6;margin-top:6px}.hero-visual{height:327px;width:370px;max-width:none;justify-self:center;transform:scale(.82);margin:-4px 0 0;transform-origin:center center}.scene{height:350px}.cube{left:120px;top:135px}.tile-one{left:-8px;top:45px;width:127px}.tile-two{right:-8px;width:134px;top:12px}.tile-three{right:-20px;bottom:0;width:153px}.halo{left:10px}.halo-b{left:-20px}.sphere-one{left:10px;bottom:25px}.motion-toggle{bottom:-43px;left:95px;font-size:14px}.hero-visual .visual-caption{display:none}.ribbon{padding:20px 17px;margin-top:20px}.ribbon>div{gap:12px;font-size:11px;letter-spacing:.5px}aside{padding:25px 20px 0}nav{gap:8px}nav button{font-size:13px;padding:10px 11px}.nav-icon{font-size:16px;width:15px}main{padding:29px 20px 0}.breadcrumb{font-size:11px}.directory-title{font-size:30px;letter-spacing:-.7px}.intro>p{font-size:16px}.search{padding:16px 13px;gap:9px}.search input{font-size:16px}kbd{display:none}.search-meta{font-size:12px;flex-direction:column;align-items:flex-start;gap:13px}.directory-heading{margin-top:30px;align-items:flex-start}.directory-heading h2{font-size:24px}.directory-heading>span{font-size:12px;padding-top:7px}.featured{grid-template-columns:1fr}.featured-copy{padding:24px}.feature-title h3{font-size:26px}.featured p{font-size:16px}.feature-art{display:none}.badge{font-size:10px}.concept-heading{align-items:flex-start;gap:12px}.concept-heading h3{font-size:22px}.concept-heading p{font-size:14px}.concept-count{font-size:11px}.cards{grid-template-columns:1fr;gap:15px}.card{padding:24px;min-height:250px}.card h3{font-size:22px;line-height:1.3}.card p{font-size:16px}.status{font-size:11px}.tool-icon{width:43px;height:43px;font-size:25px}.card-bottom{font-size:12px;gap:9px}.about{align-items:flex-start;gap:13px;padding:26px 0}.about h2{font-size:18px;line-height:1.5}.about p{font-size:14px}footer{flex-direction:column;gap:9px;font-size:11px;line-height:1.6}}@media(max-width:360px){.hero h1{font-size:36px}.hero-visual{transform:scale(.72);height:300px}.hero-primary{font-size:13px}.directory-heading{flex-wrap:wrap}.concept-count{display:none}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.scene *{animation:none!important}.hero-primary{transition:none}.hero-primary:hover{transform:none}}
/* Available catalogue grows without changing the established homepage design. */
#available{display:grid;gap:20px}.mini-calculator{width:105px;padding:13px;background:linear-gradient(135deg,#fff,#d9e6ff);border:4px solid white;border-radius:12px;box-shadow:5px 10px 0 #cadbf8,10px 15px 24px #375c9e25;transform:rotate(9deg)}.calc-display{font:17px monospace;letter-spacing:-1px;color:#3d68a4;background:#d4e2f8;border-radius:5px;text-align:right;padding:8px 4px;margin-bottom:12px}.calc-keys{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}.calc-keys i{height:18px;background:white;border-radius:4px;box-shadow:0 2px 0 #b9ceef}.calc-keys i:last-child{background:#2463eb}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

.math-tile{width:108px;height:128px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;border:4px solid white;border-radius:14px;background:linear-gradient(135deg,#fff,#d8e6ff);box-shadow:5px 9px 0 #c6d8f6,10px 17px 24px #375c9e25;transform:rotate(9deg);color:#2463eb}.math-tile>span{font:55px Arial,sans-serif}.math-tile small{font-size:10px;letter-spacing:1px;color:#4d6e9f}

/* Scalable directory entry points, without a fixed list of tools. */
.browse-tools-link{display:flex;align-items:center;gap:8px;min-height:44px}.growing-link{font-size:12px;color:#4f6e99;display:flex;gap:10px;align-items:center;min-height:40px}.growing-link:hover{background:#eef4ff;color:var(--accent)}.directory-title:focus{outline:none}
@media(max-width:520px){.header-inner{height:auto;min-height:91px;padding-top:15px;padding-bottom:12px;flex-wrap:wrap;gap:8px 12px}.browse-tools-link{display:flex;margin-left:auto;font-size:14px;gap:3px;min-height:36px}.browse-tools-link span{margin-left:2px}.growing-link{margin-left:0;width:100%;justify-content:flex-end;min-height:32px;border:0;padding:0;font-size:13px}}

.blog-nav-link{font-size:17px;font-weight:650;padding:12px 4px;color:var(--accent)}@media(max-width:520px){.blog-nav-link{font-size:16px}.header-inner .brand{font-size:25px}.header-inner{gap:8px}}