diff --git a/.gitignore b/.gitignore
index 8a48101..cb8c9e0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,2 @@
 /target
-.direnv
-output.svg
-layout.json
\ No newline at end of file
+.direnv
\ No newline at end of file
diff --git a/Cargo.lock b/Cargo.lock
index ff239f4..1e7798b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,17 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "ahash"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c99f64d1e06488f620f932677e24bc6e2897582980441ae90a671415bd7ec2f"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+ "version_check",
+]
+
 [[package]]
 name = "aho-corasick"
 version = "1.0.4"
@@ -61,6 +72,18 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "bumpalo"
+version = "3.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a3e2c3daef883ecc1b5d58c15adae93470a91d425f3532ba1695849656af3fc1"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
 [[package]]
 name = "convert_case"
 version = "0.4.0"
@@ -101,6 +124,36 @@ dependencies = [
  "serde_json",
  "strum",
  "strum_macros",
+ "sycamore",
+ "web-sys",
+]
+
+[[package]]
+name = "getrandom"
+version = "0.2.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be4136b2a15dd319360be1c07d9933517ccf0be8f16bf62a3bee4f0d618df427"
+dependencies = [
+ "cfg-if",
+ "js-sys",
+ "libc",
+ "wasi",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "hashbrown"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
+
+[[package]]
+name = "hashbrown"
+version = "0.13.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "43a3c133739dddd0d2990f9a4bdf8eb4b21ef50e4851ca85ab661199821d510e"
+dependencies = [
+ "ahash",
 ]
 
 [[package]]
@@ -109,6 +162,15 @@ version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
 
+[[package]]
+name = "html-escape"
+version = "0.2.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d1ad449764d627e22bfd7cd5e8868264fc9236e07c752972b4080cd351cb476"
+dependencies = [
+ "utf8-width",
+]
+
 [[package]]
 name = "humansize"
 version = "2.1.3"
@@ -118,12 +180,31 @@ dependencies = [
  "libm",
 ]
 
+[[package]]
+name = "indexmap"
+version = "1.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
+dependencies = [
+ "autocfg",
+ "hashbrown 0.12.3",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "af150ab688ff2122fcef229be89cb50dd66af9e01a4ff320cc137eecc9bacc38"
 
+[[package]]
+name = "js-sys"
+version = "0.3.64"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c5f195fe497f702db0f318b07fdd68edb16955aed830df8363d837542f8f935a"
+dependencies = [
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "kle-serial"
 version = "0.2.2"
@@ -141,12 +222,24 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
+[[package]]
+name = "libc"
+version = "0.2.147"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b4668fb0ea861c1df094127ac5f1da3409a82116a4ba74fca2e58ef927159bb3"
+
 [[package]]
 name = "libm"
 version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f7012b1bbb0719e1097c47611d3898568c546d597c2e74d66f6087edd5233ff4"
 
+[[package]]
+name = "log"
+version = "0.4.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b5e6163cb8c49088c2c36f57875e58ccd8c87c7427f7fbd50ea6710b2f3f2e8f"
+
 [[package]]
 name = "memchr"
 version = "2.5.0"
@@ -194,6 +287,18 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "once_cell"
+version = "1.18.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd8b5dd2ae5ed71462c540258bedcb51965123ad7e7ccf4b9a8cafaa4a63576d"
+
+[[package]]
+name = "paste"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "de3145af08024dea9fa9914f381a17b8fc6034dfb00f3a84013f7ff43f29ed4c"
+
 [[package]]
 name = "percent-encoding"
 version = "2.3.0"
@@ -242,6 +347,12 @@ dependencies = [
  "siphasher",
 ]
 
+[[package]]
+name = "ppv-lite86"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.66"
@@ -266,6 +377,18 @@ version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
 dependencies = [
+ "libc",
+ "rand_chacha",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+dependencies = [
+ "ppv-lite86",
  "rand_core",
 ]
 
@@ -274,6 +397,9 @@ name = "rand_core"
 version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+dependencies = [
+ "getrandom",
+]
 
 [[package]]
 name = "regex"
@@ -374,6 +500,21 @@ version = "0.3.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7bd3e3206899af3f8b12af284fafc038cc1dc2b41d1b89dd17297221c5d225de"
 
+[[package]]
+name = "slotmap"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e1e08e261d0e8f5c43123b7adf3e4ca1690d655377ac93a03b2c9d3e98de1342"
+dependencies = [
+ "version_check",
+]
+
+[[package]]
+name = "smallvec"
+version = "1.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62bb4feee49fdd9f707ef802e22365a35de4b7b299de4763d44bfea899442ff9"
+
 [[package]]
 name = "strum"
 version = "0.25.0"
@@ -393,6 +534,78 @@ dependencies = [
  "syn 2.0.28",
 ]
 
+[[package]]
+name = "sycamore"
+version = "0.9.0-beta.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a3b717c579f5d8c2042aaa45972c2340ffcb5ff0890aea6aec7c04df15564679"
+dependencies = [
+ "hashbrown 0.13.2",
+ "indexmap",
+ "js-sys",
+ "paste",
+ "sycamore-core",
+ "sycamore-macro",
+ "sycamore-reactive",
+ "sycamore-web",
+ "wasm-bindgen",
+ "web-sys",
+]
+
+[[package]]
+name = "sycamore-core"
+version = "0.9.0-beta.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4f663c943037d6d0fa44e01f95391d8ccca6f7e886fdba8a172af4e88bd68af9"
+dependencies = [
+ "hashbrown 0.13.2",
+ "sycamore-reactive",
+]
+
+[[package]]
+name = "sycamore-macro"
+version = "0.9.0-beta.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df04d124cefaed44e301746990b91ff710a30898142d5399d021dfb331635764"
+dependencies = [
+ "once_cell",
+ "proc-macro2",
+ "quote",
+ "rand",
+ "syn 2.0.28",
+]
+
+[[package]]
+name = "sycamore-reactive"
+version = "0.9.0-beta.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a2ba60d068e3e980f8ba26586d43c068d64fbd52d5a33afaf92e3b65f96ddf38"
+dependencies = [
+ "bumpalo",
+ "getrandom",
+ "hashbrown 0.13.2",
+ "indexmap",
+ "slotmap",
+ "smallvec",
+]
+
+[[package]]
+name = "sycamore-web"
+version = "0.9.0-beta.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5455789b699834fdd6be88a99c3cda9764522afec5dd6716660246e0399a44b6"
+dependencies = [
+ "hashbrown 0.13.2",
+ "html-escape",
+ "indexmap",
+ "js-sys",
+ "once_cell",
+ "sycamore-core",
+ "sycamore-reactive",
+ "wasm-bindgen",
+ "web-sys",
+]
+
 [[package]]
 name = "syn"
 version = "1.0.109"
@@ -430,8 +643,84 @@ version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "301abaae475aa91687eb82514b328ab47a211a533026cb25fc3e519b86adfc3c"
 
+[[package]]
+name = "utf8-width"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5190c9442dcdaf0ddd50f37420417d219ae5261bbf5db120d0f9bab996c9cba1"
+
 [[package]]
 name = "version_check"
 version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+
+[[package]]
+name = "wasi"
+version = "0.11.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.87"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7706a72ab36d8cb1f80ffbf0e071533974a60d0a308d01a5d0375bf60499a342"
+dependencies = [
+ "cfg-if",
+ "wasm-bindgen-macro",
+]
+
+[[package]]
+name = "wasm-bindgen-backend"
+version = "0.2.87"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5ef2b6d3c510e9625e5fe6f509ab07d66a760f0885d858736483c32ed7809abd"
+dependencies = [
+ "bumpalo",
+ "log",
+ "once_cell",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.28",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.87"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dee495e55982a3bd48105a7b947fd2a9b4a8ae3010041b9e0faab3f9cd028f1d"
+dependencies = [
+ "quote",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.87"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "54681b18a46765f095758388f2d0cf16eb8d4169b639ab575a8f5693af210c7b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.28",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.87"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca6ad05a4870b2bf5fe995117d3728437bd27d7cd5f06f13c17443ef369775a1"
+
+[[package]]
+name = "web-sys"
+version = "0.3.64"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b85cbef8c220a6abc02aefd892dfc0fc23afb1c6a426316ec33253a3877249b"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
diff --git a/dist/index.html b/dist/index.html
new file mode 100644
index 0000000..81790f4
--- /dev/null
+++ b/dist/index.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html><html lang="en"><head>
+        <meta charset="UTF-8">
+        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+        <title>dyesub-tool</title>
+    </head>
+    <body>
+<script>(function () {
+    var protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
+    var url = protocol + '//' + window.location.host + '/_trunk/ws';
+    var poll_interval = 5000;
+    var reload_upon_connect = () => {
+        window.setTimeout(
+            () => {
+                // when we successfully reconnect, we'll force a
+                // reload (since we presumably lost connection to
+                // trunk due to it being killed, so it will have
+                // rebuilt on restart)
+                var ws = new WebSocket(url);
+                ws.onopen = () => window.location.reload();
+                ws.onclose = reload_upon_connect;
+            },
+            poll_interval);
+    };
+
+    var ws = new WebSocket(url);
+    ws.onmessage = (ev) => {
+        const msg = JSON.parse(ev.data);
+        if (msg.reload) {
+            window.location.reload();
+        }
+    };
+    ws.onclose = reload_upon_connect;
+})()
+</script></body></html>
\ No newline at end of file
diff --git a/dyesub-tool/.gitignore b/dyesub-tool/.gitignore
new file mode 100644
index 0000000..9bfc447
--- /dev/null
+++ b/dyesub-tool/.gitignore
@@ -0,0 +1,3 @@
+layout.json
+output.svg
+dist
\ No newline at end of file
diff --git a/dyesub-tool/Cargo.toml b/dyesub-tool/Cargo.toml
index 4bf83bb..b0bfd71 100644
--- a/dyesub-tool/Cargo.toml
+++ b/dyesub-tool/Cargo.toml
@@ -12,3 +12,5 @@ regex = "1.9.3"
 serde_json = "1.0.105"
 strum = "0.25.0"
 strum_macros = "0.25.2"
+sycamore = "0.9.0-beta.1"
+web-sys = "0.3.64"
diff --git a/dyesub-tool/index.html b/dyesub-tool/index.html
new file mode 100644
index 0000000..c84ca76
--- /dev/null
+++ b/dyesub-tool/index.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        <meta charset="UTF-8">
+        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+        <title>dyesub-tool</title>
+        <link data-trunk rel="css" href="missing.min.css"> <!-- 1.0.9 -->
+    </head>
+    <body>
+        <main>
+
+        </main>
+    </body>
+</html>
\ No newline at end of file
diff --git a/dyesub-tool/missing.min.css b/dyesub-tool/missing.min.css
new file mode 100644
index 0000000..ff2a1ac
--- /dev/null
+++ b/dyesub-tool/missing.min.css
@@ -0,0 +1,126 @@
+@keyframes bg{0%{background:0 0}}*,::after,::before{box-sizing:border-box;background-repeat:no-repeat}::after,::before{text-decoration:inherit;vertical-align:inherit}:root{cursor:default;overflow-wrap:break-word;-webkit-tap-highlight-color:transparent;text-size-adjust:none;-webkit-text-size-adjust:none}abbr[title]{-webkit-text-decoration:underline dotted;text-decoration:underline dotted}b,strong{font-weight:bolder}audio,canvas,iframe,img,svg,video{vertical-align:middle}svg:not([fill]){fill:currentColor}table{border-collapse:collapse;border-color:currentColor;text-indent:0;font-variant-numeric:tabular-nums;font:inherit}body,button,input,select,textarea{margin:0}[type=button],[type=reset],[type=submit],button{-webkit-appearance:button}fieldset{border:1px solid #a0a0a0;position:relative;padding:var(--gap);margin:var(--gap) 0;width:100%;border-radius:var(--border-radius);border:1px solid 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calc(var(--gap)/2);display:block;text-decoration:none;border-radius:0;color:var(--fg)}[role=menuitem]:active,[role=menuitem]:focus{background:var(--accent);color:var(--bg)}[role=listbox]{list-style:none}[role=listbox] [role=option]{margin-inline:calc(-1*var(--gap));padding-inline:var(--gap)}[role=listbox] [role=option][aria-selected=true]{background:var(--interactive-bg)}[role=listbox] .active[role=option]{--temporary-bg: var(--accent);--temporary-fg: var(--bg);--temporary-accent: parent-var(--muted-accent);--temporary-muted-accent: parent-var(--box-bg);background:var(--temporary-bg);color:var(--temporary-fg)}[role=listbox] .active[role=option]>*{--bg: var(--temporary-bg);--fg: var(--temporary-fg);--accent: var(--temporary-accent);--muted-accent: var(--temporary-muted-accent)}[aria-orientation=vertical]{flex-direction:column;width:-moz-fit-content;width:fit-content;text-align:center}.plain{--box-bg: var(--plain-bg);--accent: var(--plain-fg);--graphical-fg: var(--plain-graphical-fg)}.info{--box-bg: var(--info-bg);--accent: var(--info-fg);--graphical-fg: var(--info-graphical-fg)}.ok{--box-bg: var(--ok-bg);--accent: var(--ok-fg);--graphical-fg: var(--ok-graphical-fg)}.warn{--box-bg: var(--warn-bg);--accent: var(--warn-fg);--graphical-fg: var(--warn-graphical-fg)}.bad{--box-bg: var(--bad-bg);--accent: var(--bad-fg);--graphical-fg: var(--bad-graphical-fg)}.color{color:var(--accent)}.bg{background:var(--box-bg)}.border{border-style:solid;border-color:var(--graphical-fg)}:root{--fg: var(--gray-12);--muted-fg: var(--gray-10);--faded-fg: var(--gray-6);--graphical-fg: var(--plain-graphical-fg);--plain-fg: var(--blue-10);--info-fg: var(--blue-11);--ok-fg: var(--green-11);--bad-fg: var(--red-11);--warn-fg: var(--yellow-11);--plain-graphical-fg: var(--gray-6);--info-graphical-fg: var(--blue-6);--ok-graphical-fg: var(--green-6);--bad-graphical-fg: var(--red-6);--warn-graphical-fg: var(--yellow-6);--bg: var(--gray-0);--box-bg: var(--plain-bg);--interactive-bg: var(--gray-4);--plain-bg: var(--gray-1);--info-bg: var(--blue-1);--ok-bg: var(--green-1);--bad-bg: var(--red-1);--warn-bg: var(--yellow-1);--accent: var(--blue-10);--muted-accent: var(--blue-7);--rhythm: 1.4rem;--line-length: 40rem;--border-radius: .2rem;--main-font: 'Source Sans 3', 'Source Sans Pro', -apple-system, system-ui, sans-serif;--secondary-font: var(--main-font);--mono-font: 'M Plus Code Latin', monospace, monospace;--density: 1;--full-width: 100vw;--eff-line-length: /* Effective line length for prose. */
+		min(
+			calc( var(--full-width) - (2 * var(--rhythm)) ),
+			var(--line-length)
+		);--gutter-width: /* Width of spaces at each side of page content. */
+		calc(
+			(
+				var(--full-width)        /* Viewport width */
+				- var(--eff-line-length) /* minus line width */
+			) / 2)}@media (prefers-color-scheme:dark){:root:not(.-no-dark-theme){--fg: var(--gray-0);--muted-fg: var(--gray-2);--faded-fg: var(--gray-7);--plain-bg: var(--gray-11);--info-bg: var(--blue-12);--ok-bg: var(--green-12);--bad-bg: var(--red-12);--warn-bg: var(--yellow-12);--plain-faded-fg: var(--blue-6);--info-faded-fg: var(--blue-6);--ok-faded-fg: var(--green-6);--bad-faded-fg: var(--red-6);--warn-faded-fg: var(--yellow-6);--bg: var(--gray-12);--box-bg: var(--gray-10);--interactive-bg: var(--gray-8);--plain-fg: (--blue-3);--info-fg: var(--blue-3);--ok-fg: var(--green-3);--bad-fg: var(--red-3);--warn-fg: var(--yellow-3);--accent: var(--blue-3);--muted-accent: var(--blue-5)}}*{--gap: calc(var(--rhythm) * var(--density));accent-color:var(--accent)}.textcolumns{--col-width: 30ch;column-width:var(--col-width);column-gap:var(--gap);margin-block:var(--gap)}.textcolumns :first-child{-webkit-margin-before:0!important;margin-block-start:0!important}.text-align\:center{text-align:center}.center{display:grid;place-items:center}.container{max-inline-size:var(--eff-line-length);margin-inline:auto}.fullbleed,.fullscreen{position:relative;left:50%;border-radius:0;border-inline:none}.fullbleed{width:var(--full-width);transform:translateX(calc(-.5*var(--full-width)))}.fullscreen{height:100vh;width:100vw;transform:translateX(-50vw)}.width\:100\%{width:100%;max-width:100%}.height\:100\%{height:100%;max-height:100%}:is(
+    body,
+    .box, 
+    [role=menu],
+    .sidebar-layout > header,
+    [role=tabpanel],
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+    dialog,
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+    fieldset,
+    dd,
+    td,
+    th
+)>:first-child:first-child:first-child:first-child,:is(
+    body,
+    .box, 
+    [role=menu],
+    .sidebar-layout > header,
+    [role=tabpanel],
+    figure,
+    details,
+    dialog,
+    aside,
+    fieldset,
+    dd,
+    td,
+    th
+)>:first-child>:first-child:first-child:first-child,:is(
+    body,
+    .box, 
+    [role=menu],
+    .sidebar-layout > header,
+    [role=tabpanel],
+    figure,
+    details,
+    dialog,
+    aside,
+    fieldset,
+    dd,
+    td,
+    th
+)>:first-child>:first-child>:first-child:first-child,:is(
+    body,
+    .box, 
+    [role=menu],
+    .sidebar-layout > header,
+    [role=tabpanel],
+    figure,
+    details,
+    dialog,
+    aside,
+    fieldset,
+    dd,
+    td,
+    th
+)>:first-child>:first-child>:first-child>:first-child{-webkit-margin-before:0;margin-block-start:0}:is(
+    body,
+    .box, 
+    [role=menu],
+    .sidebar-layout > header,
+    [role=tabpanel],
+    figure,
+    details,
+    dialog,
+    aside,
+    fieldset,
+    dd,
+    td,
+    th
+)>:last-child:last-child:last-child:last-child,:is(
+    body,
+    .box, 
+    [role=menu],
+    .sidebar-layout > header,
+    [role=tabpanel],
+    figure,
+    details,
+    dialog,
+    aside,
+    fieldset,
+    dd,
+    td,
+    th
+)>:last-child>:last-child:last-child:last-child,:is(
+    body,
+    .box, 
+    [role=menu],
+    .sidebar-layout > header,
+    [role=tabpanel],
+    figure,
+    details,
+    dialog,
+    aside,
+    fieldset,
+    dd,
+    td,
+    th
+)>:last-child>:last-child>:last-child:last-child,:is(
+    body,
+    .box, 
+    [role=menu],
+    .sidebar-layout > header,
+    [role=tabpanel],
+    figure,
+    details,
+    dialog,
+    aside,
+    fieldset,
+    dd,
+    td,
+    th
+)>:last-child>:last-child>:last-child>:last-child{-webkit-margin-after:0;margin-block-end:0}.padding{padding-inline:var(--gap)}.padding-block{padding-block:var(--gap)}.padding-block-start{-webkit-padding-before:var(--gap);padding-block-start:var(--gap)}.padding-block-end{-webkit-padding-after:var(--gap);padding-block-end:var(--gap)}.padding-inline{padding-inline:var(--gap)}.padding-inline-end,.padding-inline-start{-webkit-padding-start:var(--gap);padding-inline-start:var(--gap)}.margin{margin:var(--gap)}.margin-block{margin-block:var(--gap)}.margin-block-start{-webkit-margin-before:var(--gap);margin-block-start:var(--gap)}.margin-block-end{-webkit-margin-after:var(--gap);margin-block-end:var(--gap)}.margin-inline{margin-inline:var(--gap)}.margin-inline-start{-webkit-margin-start:var(--gap);margin-inline-start:var(--gap)}.margin-inline-end{-webkit-margin-end:var(--gap);margin-inline-end:var(--gap)}.flow-gap>:not(:last-child){margin-bottom:1em}.inline{display:inline}.block{display:block}.contents{display:contents}.table{display:table;width:100%;margin:0}.row,.rows>*{display:table-row}.row:not(:last-child):not([specificity-hack])>*,.rows>:not(:last-child):not([specificity-hack])>*{margin-bottom:var(--gap)}.row>:not([specificity-hack]),.rows>*>:not([specificity-hack]){display:table-cell;vertical-align:top}.row>*+:not([specificity-hack]),:is(.rows > *)>*+:not([specificity-hack]){-webkit-margin-start:var(--gap);margin-inline-start:var(--gap);display:inline-block}.big{font-size:1.4em;line-height:calc(1.5*var(--rhythm))}.fixed{position:fixed}.sticky{position:sticky}.top{top:0}.right{right:0}.bottom{bottom:0}.left{left:0}.float\:left{float:left}.float\:right{float:right}.overflow\:auto{overflow:auto}.overflow\:scroll{overflow:scroll}.airy{--density: 3}.spacious{--density: 2}.dense{--density: 1}.crowded{--density: .5}.packed{--density: 0}.autodensity{--density: 1
+}@media (min-width:768px){.autodensity{--density: 2 
+}}@media (min-width:1024px){.autodensity{--density: 3 
+}}.vh,v-h{clip:rect(0 0 0 0);-webkit-clip-path:inset(50%);clip-path:inset(50%);block-size:1px;inline-size:1px;overflow:hidden;white-space:nowrap}.all\:initial{all:initial}.bold{font-weight:700}.italic{font-style:italic}.allcaps{text-transform:uppercase;letter-spacing:.1rem}.primary-font{font-family:var(--primary-font)}.secondary-font{font-family:var(--secondary-font)}.display-font{font-family:var(--display-font)}.mono-font,.monospace{font-family:var(--mono-font)}.massivetext{font-size:calc(.13*var(--eff-line-length));line-height:1em;letter-spacing:0}.aestheticbreak{display:block;margin:0;padding:0;height:calc(.5*var(--gap))}.f-row{display:flex;flex-direction:row;gap:var(--gap)}.f-row>*{margin:0}.f-col{display:flex;flex-direction:column;gap:var(--gap)}.f-col>*{margin:0}.f-switch{display:flex;flex-wrap:wrap;gap:var(--gap);--f-switch-threshold: 55ch
+}.f-switch>*{margin:0;flex-grow:1;flex-basis:calc((var(--f-switch-threshold) - 100%)*999)}.justify-content\:start{justify-content:start}.justify-content\:end{justify-content:end}.justify-content\:baseline{justify-content:baseline}.justify-content\:center{justify-content:center}.justify-content\:stretch{justify-content:stretch}.justify-content\:space-between{justify-content:space-between}.justify-content\:space-around{justify-content:space-around}.justify-content\:space-evenly{justify-content:space-evenly}.align-items\:start{align-items:start}.align-items\:end{align-items:end}.align-items\:baseline{align-items:baseline}.align-items\:center{align-items:center}.align-items\:stretch{align-items:stretch}.align-self\:start{align-self:start}.align-self\:end{align-self:end}.align-self\:baseline{align-self:baseline}.align-self\:center{align-self:center}.align-self\:stretch{align-self:stretch}.flex-grow\:0{flex-grow:0}.flex-grow\:1{flex-grow:1}.flex-grow\:2{flex-grow:2}.flex-grow\:3{flex-grow:3}.flex-grow\:4{flex-grow:4}.flex-grow\:5{flex-grow:5}.flex-grow\:6{flex-grow:6}.flex-grow\:7{flex-grow:7}.flex-grow\:8{flex-grow:8}.flex-grow\:9{flex-grow:9}.flex-grow\:10{flex-grow:10}.flex-grow\:11{flex-grow:11}.flex-grow\:12{flex-grow:12}.flex-wrap\:wrap{flex-wrap:wrap}.flex-wrap\:nowrap{flex-wrap:nowrap}.grid{display:grid;grid-auto-columns:var(--grid-col-width, 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\ No newline at end of file
diff --git a/dyesub-tool/src/main.rs b/dyesub-tool/src/main.rs
index be40312..fc4ae75 100644
--- a/dyesub-tool/src/main.rs
+++ b/dyesub-tool/src/main.rs
@@ -1,10 +1,25 @@
 pub mod svg;
-
 mod render;
 
-use render::{render_file, Result};
+use sycamore::prelude::*;
+
+#[component]
+fn Slider<G: Html>(cx: Scope) -> View<G> {
+    let value = create_signal(cx, 0.0);
+    view! { cx,
+        (value.get())
+        input(type="range", bind:valueAsNumber=value)
+    }
+}
 
-fn main() -> Result<()> {
-    render_file("layout.json", "output.svg")?;
-    Ok(())
+fn main() {
+    sycamore::render_to(|cx| view! { cx,
+        Slider
+        Slider
+        Slider
+    }, {
+        let window = web_sys::window().unwrap();
+        let document = window.document().unwrap();
+        &document.query_selector("main").unwrap().unwrap()
+    });
 }
diff --git a/flake.nix b/flake.nix
index dc99fc7..d9d8ff9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -39,6 +39,7 @@ Updating `cargoHash`:
       devShells.${system}.default = with pkgs; mkShell {
         packages = [
           (pkgs.rust-bin.stable.latest.default.override {
+            targets = [ "wasm32-unknown-unknown" ];
             extensions = [ "rust-src" ];
           })
           bacon
@@ -51,7 +52,8 @@ Updating `cargoHash`:
           pname = "dyesub-tool";
           version = "0.1.0";
           buildAndTestSubdir = "dyesub-tool";
-          cargoHash = "sha256-kZUTrejN4KVZ91CkpweLivwm9KaMT+fT6Ljq5Vy0Jik=";
+          buildInputs = with pkgs; [ trunk ];
+          cargoHash = "sha256-Nh+XIRDru7wMnEqXP1V1zMK7B4uDQqT9Fg18BZtGEYQ=";
           meta = meta // {
             description = "A tool for generating dye sublimation transfer sheet SVGs for Japanese thumb shift 拇指シフト keycaps.";
           };