6 Commits

Author SHA1 Message Date
1519032f5b Fixed the dual bulb issue, added new font to typeface package
Signed-off-by: Alexander Lyall <alex@adcm.uk>
2025-12-16 14:27:51 +00:00
8d701a7704 Update to increment/decrement buttons and rearrangement of buttons.
Page now broken...

Signed-off-by: Alexander Lyall <alex@adcm.uk>
2025-12-16 13:04:21 +00:00
ac585701a3 Fix broken code
Signed-off-by: Alexander Lyall <alex@adcm.uk>
2025-12-16 11:30:59 +00:00
002fbb8b6c Addition of increment/decrement buttons, addition of Auto Random button
Signed-off-by: Alexander Lyall <alex@adcm.uk>
2025-12-16 11:19:51 +00:00
e6da9c8c98 Tweaks to Binary UI
Signed-off-by: Alexander Lyall <alex@adcm.uk>
2025-12-15 19:58:34 +00:00
d4765b3788 feat(v2-alpha): refactor binary simulator and introduce shared site layout
- Rewrite binary simulator with unified unsigned and two’s complement logic
- Support dynamic bit widths from 4 to 64 with LSB-preserving resizing
- Replace legacy unsigned-only scripts with a single maintainable implementation
- Extract binary styles into dedicated CSS and add global site styling
- Introduce shared header, footer, and base layout components
- Migrate Binary page to BaseLayout and modular assets

Signed-off-by: Alexander Lyall <alex@adcm.uk>
2025-12-14 19:46:23 +00:00
21 changed files with 1236 additions and 1620 deletions

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@@ -1,7 +1,7 @@
{ {
"name": "computing-box", "name": "Computing:Box",
"type": "module", "type": "module",
"version": "0.0.1", "version": "2.0.0 Alpha",
"scripts": { "scripts": {
"dev": "astro dev", "dev": "astro dev",
"build": "astro build", "build": "astro build",

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@@ -1,137 +0,0 @@
/* ---------- DSEG7 font ---------- */
/* Put your font file here:
public/fonts/DSEG7Classic-Regular.woff2
*/
@font-face {
font-family: "DSEG7ClassicRegular";
src: url("/fonts/DSEG7Classic-Regular.woff2") format("woff2");
font-display: swap;
}
/* ---------- Layout ---------- */
.tool-shell {
min-height: 100vh;
display: grid;
place-items: center;
padding: 1rem;
background: #0b0f14;
color: #e7eaf0;
font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}
.tool-card {
width: min(1100px, 100%);
background: #111824;
border: 1px solid rgba(255,255,255,0.08);
border-radius: 18px;
padding: 1rem;
}
.tool-header h1 { margin: 0 0 .25rem 0; font-size: 1.4rem; }
.tool-header p { margin: 0 0 1rem 0; opacity: .85; }
.display-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: .75rem;
margin-bottom: .75rem;
}
.display-box {
background: #0b0f14;
border: 1px solid rgba(255,255,255,0.08);
border-radius: 14px;
padding: .75rem;
}
.display-label { font-size: .9rem; opacity: .8; margin-bottom: .25rem; }
.sevenseg {
font-family: "DSEG7ClassicRegular", monospace;
font-size: clamp(2rem, 4vw, 3.2rem);
letter-spacing: 0.08em;
line-height: 1.1;
}
/* Buttons under denary/binary (your request) */
.actions {
display: flex;
flex-wrap: wrap;
gap: .5rem;
margin-bottom: 1rem;
}
/* ---------- Simple MD3-ish buttons ---------- */
.md3-btn {
border: 1px solid rgba(255,255,255,0.16);
background: rgba(255,255,255,0.06);
color: #e7eaf0;
padding: .6rem .9rem;
border-radius: 999px;
cursor: pointer;
font-weight: 600;
}
.md3-btn:hover { background: rgba(255,255,255,0.10); }
.md3-btn--tonal { background: rgba(255,255,255,0.10); }
/* ---------- Switches row ---------- */
.switch-row {
display: grid;
grid-template-columns: repeat(8, minmax(90px, 1fr));
gap: .75rem;
}
.switch-col {
display: grid;
justify-items: center;
gap: .35rem;
}
.bit-label { opacity: .85; font-weight: 600; }
/* ---------- “Light switch” rocker ---------- */
.rocker {
position: relative;
width: 70px;
height: 46px;
display: inline-block;
user-select: none;
}
.rocker input {
opacity: 0;
width: 0;
height: 0;
}
.rocker-body {
position: absolute;
inset: 0;
border-radius: 12px;
background: #1a2331;
border: 1px solid rgba(255,255,255,0.14);
box-shadow: inset 0 0 0 2px rgba(0,0,0,0.35);
}
/* the “toggle” */
.rocker-body::after {
content: "";
position: absolute;
left: 6px;
top: 6px;
width: 58px;
height: 18px;
border-radius: 10px;
background: rgba(255,255,255,0.20);
transition: transform 180ms ease, background 180ms ease;
}
/* ON position */
.rocker input:checked + .rocker-body::after {
transform: translateY(16px);
background: rgba(255,255,255,0.55);
}
@media (max-width: 900px) {
.switch-row { grid-template-columns: repeat(4, minmax(90px, 1fr)); }
}

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@@ -1,9 +0,0 @@
<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 128 128">
<path d="M50.4 78.5a75.1 75.1 0 0 0-28.5 6.9l24.2-65.7c.7-2 1.9-3.2 3.4-3.2h29c1.5 0 2.7 1.2 3.4 3.2l24.2 65.7s-11.6-7-28.5-7L67 45.5c-.4-1.7-1.6-2.8-2.9-2.8-1.3 0-2.5 1.1-2.9 2.7L50.4 78.5Zm-1.1 28.2Zm-4.2-20.2c-2 6.6-.6 15.8 4.2 20.2a17.5 17.5 0 0 1 .2-.7 5.5 5.5 0 0 1 5.7-4.5c2.8.1 4.3 1.5 4.7 4.7.2 1.1.2 2.3.2 3.5v.4c0 2.7.7 5.2 2.2 7.4a13 13 0 0 0 5.7 4.9v-.3l-.2-.3c-1.8-5.6-.5-9.5 4.4-12.8l1.5-1a73 73 0 0 0 3.2-2.2 16 16 0 0 0 6.8-11.4c.3-2 .1-4-.6-6l-.8.6-1.6 1a37 37 0 0 1-22.4 2.7c-5-.7-9.7-2-13.2-6.2Z" />
<style>
path { fill: #000; }
@media (prefers-color-scheme: dark) {
path { fill: #FFF; }
}
</style>
</svg>

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@@ -1,115 +0,0 @@
// Browser-only script. Safe because it's loaded via <script> (not server-imported).
const BIT_COUNT = 8; // unsigned page = 8 bits
const bitValues = [128, 64, 32, 16, 8, 4, 2, 1];
const elDenary = document.getElementById("denaryNumber");
const elBinary = document.getElementById("binaryNumber");
const elSwitches = document.getElementById("bitSwitches");
const btnCustomDenary = document.getElementById("btnCustomDenary");
const btnCustomBinary = document.getElementById("btnCustomBinary");
const btnReset = document.getElementById("btnReset");
let bits = new Array(BIT_COUNT).fill(false);
function renderSwitches() {
elSwitches.innerHTML = "";
bitValues.forEach((value, index) => {
const id = `bit-${value}`;
const wrapper = document.createElement("div");
wrapper.className = "switch-col";
const labelTop = document.createElement("div");
labelTop.className = "bit-label";
labelTop.textContent = value;
const label = document.createElement("label");
label.className = "rocker";
label.setAttribute("for", id);
const input = document.createElement("input");
input.type = "checkbox";
input.id = id;
input.checked = bits[index];
input.addEventListener("change", () => {
bits[index] = input.checked;
updateNumbers();
});
const span = document.createElement("span");
span.className = "rocker-body";
span.setAttribute("aria-hidden", "true");
label.appendChild(input);
label.appendChild(span);
wrapper.appendChild(labelTop);
wrapper.appendChild(label);
elSwitches.appendChild(wrapper);
});
}
function updateNumbers() {
const binary = bits.map(b => (b ? "1" : "0")).join("");
const denary = bits.reduce((acc, b, i) => acc + (b ? bitValues[i] : 0), 0);
elBinary.textContent = binary;
elDenary.textContent = denary.toString();
}
function resetAll() {
bits = new Array(BIT_COUNT).fill(false);
renderSwitches();
updateNumbers();
}
function requestCustomDenary() {
let input = prompt(`Enter a denary number (0 to 255):`);
if (input === null) return;
const n = Number.parseInt(input, 10);
if (Number.isNaN(n) || n < 0 || n > 255) {
alert("Invalid input. Enter a number from 0 to 255.");
return;
}
let remaining = n;
bits = bitValues.map(v => {
if (remaining >= v) {
remaining -= v;
return true;
}
return false;
});
renderSwitches();
updateNumbers();
}
function requestCustomBinary() {
let input = prompt(`Enter an ${BIT_COUNT}-bit binary number (e.g. 01010101):`);
if (input === null) return;
input = input.trim();
const re = new RegExp(`^[01]{${BIT_COUNT}}$`);
if (!re.test(input)) {
alert(`Invalid input. Enter exactly ${BIT_COUNT} digits using only 0 or 1.`);
return;
}
bits = input.split("").map(c => c === "1");
renderSwitches();
updateNumbers();
}
btnCustomDenary?.addEventListener("click", requestCustomDenary);
btnCustomBinary?.addEventListener("click", requestCustomBinary);
btnReset?.addEventListener("click", resetAll);
renderSwitches();
updateNumbers();

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@@ -1,72 +0,0 @@
// public/js/tools/unsigned-binary.js
// Lightweight: no frameworks. Works on weak devices.
const BIT_COUNT = 8;
const MAX_DENARY = 255;
let bits = new Array(BIT_COUNT).fill(false);
function bitsToBinaryString(){
return bits.map(b => (b ? "1" : "0")).join("");
}
function bitsToDenary(){
// MSB on the left: 128..1
const weights = [128,64,32,16,8,4,2,1];
return bits.reduce((acc, b, i) => acc + (b ? weights[i] : 0), 0);
}
function render(){
const grid = document.getElementById("bitGrid");
grid.innerHTML = "";
const weights = [128,64,32,16,8,4,2,1];
bits.forEach((on, i) => {
const btn = document.createElement("button");
btn.type = "button";
btn.className = "btn";
btn.style.width = "100%";
btn.style.justifyContent = "space-between";
btn.setAttribute("aria-pressed", on ? "true" : "false");
btn.innerHTML = `<span>${weights[i]}</span><b>${on ? "1" : "0"}</b>`;
btn.addEventListener("click", () => {
bits[i] = !bits[i];
update();
});
grid.appendChild(btn);
});
}
function update(){
document.getElementById("binaryNumber").innerText = bitsToBinaryString();
document.getElementById("denaryNumber").innerText = bitsToDenary();
render();
}
function requestBinary(){
let v;
do{
v = prompt("Enter an 8-bit binary value (8 digits, only 0 or 1):", bitsToBinaryString());
if(v === null) return;
v = v.trim();
}while(!/^[01]{8}$/.test(v));
bits = v.split("").map(ch => ch === "1");
update();
}
function requestDenary(){
let v;
do{
v = prompt("Enter a denary value (0 to 255):", String(bitsToDenary()));
if(v === null) return;
v = Number(v);
}while(!Number.isInteger(v) || v < 0 || v > MAX_DENARY);
// set bits from MSB to LSB
const weights = [128,64,32,16,8,4,2,1];
bits = weights.map(w => {
if(v >= w){ v -= w; return true; }
return false;
});
update();
}
function reset(){
bits = new Array(BIT_COUNT).fill(false);
update();
}
document.addEventListener("DOMContentLoaded", () => {
document.getElementById("btnCustomBinary")?.addEventListener("click", requestBinary);
document.getElementById("btnCustomDenary")?.addEventListener("click", requestDenary);
document.getElementById("btnReset")?.addEventListener("click", reset);
update();
});

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@@ -1,96 +0,0 @@
/* src/styles/md3-tokens.css */
/* MD3-inspired tokens tuned for education: high readability, clear contrast, calm surfaces */
:root{
/* Typography */
--font-sans: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
--font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
/* Spacing + shape */
--radius-1: 10px;
--radius-2: 16px;
--radius-3: 22px;
--shadow-1: 0 1px 2px rgba(0,0,0,.08), 0 2px 8px rgba(0,0,0,.06);
/* Color roles (keep simple) */
--md-surface: #ffffff;
--md-surface-2: #f6f7fb;
--md-on-surface: #111318;
--md-primary: #2f6fed; /* calm blue */
--md-on-primary: #ffffff;
--md-secondary: #5a5f72; /* muted */
--md-on-secondary: #ffffff;
--md-tertiary: #0f766e; /* teal for "practical" tools */
--md-on-tertiary: #ffffff;
--md-outline: #d7dbe7;
--md-success: #1a7f37;
--md-warning: #b54708;
--md-danger: #b42318;
/* Focus ring for accessibility */
--md-focus: 0 0 0 3px rgba(47,111,237,.28);
}
@media (prefers-color-scheme: dark){
:root{
--md-surface: #0b0e14;
--md-surface-2: #121725;
--md-on-surface: #e8eaf2;
--md-primary: #9bb6ff;
--md-on-primary: #0b0e14;
--md-secondary: #b8bccd;
--md-on-secondary: #0b0e14;
--md-tertiary: #4fd1c5;
--md-on-tertiary: #0b0e14;
--md-outline: #2b3244;
--md-focus: 0 0 0 3px rgba(155,182,255,.25);
}
}
/* src/styles/base.css */
@import "./md3-tokens.css";
html, body{ height:100%; }
body{
margin:0;
font-family: var(--font-sans);
background: var(--md-surface-2);
color: var(--md-on-surface);
}
a{ color: var(--md-primary); text-decoration: none; }
a:hover{ text-decoration: underline; }
.container{
max-width: 1100px;
margin: 0 auto;
padding: 16px;
}
.card{
background: var(--md-surface);
border: 1px solid var(--md-outline);
border-radius: var(--radius-2);
box-shadow: var(--shadow-1);
padding: 16px;
}
.btn{
display:inline-flex;
gap:8px;
align-items:center;
justify-content:center;
border-radius: 999px;
border: 1px solid var(--md-outline);
background: var(--md-surface);
color: var(--md-on-surface);
padding: 10px 14px;
font-weight: 600;
cursor: pointer;
}
.btn:hover{ filter: brightness(0.98); }
.btn:focus{ outline:none; box-shadow: var(--md-focus); }
.btn-primary{
background: var(--md-primary);
color: var(--md-on-primary);
border-color: transparent;
}
.badge{
display:inline-block;
padding: 2px 10px;
border-radius: 999px;
font-size: 12px;
border: 1px solid var(--md-outline);
background: var(--md-surface-2);
}
code, pre{ font-family: var(--font-mono); }

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@@ -0,0 +1,29 @@
<footer class="siteFooter">
<div class="inner">
<div class="title">Computer Science Concept Simulators</div>
<div class="meta">
© 2025 Computing:Box · Created with 💗 by Mr Lyall<br />
Powered by ADCM Networks
</div>
</div>
</footer>
<style>
.siteFooter{
border-top: 1px solid rgba(255,255,255,.10);
background: rgba(0,0,0,.10);
}
.inner{
max-width:1200px;
margin:0 auto;
padding: 18px 20px;
color: rgba(255,255,255,.65);
font-size: 12px;
line-height: 1.6;
}
.title{
color: rgba(255,255,255,.80);
font-weight: 800;
margin-bottom: 6px;
}
</style>

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@@ -0,0 +1,57 @@
<header class="siteHeader">
<div class="inner">
<div class="brand">
<a href="/">Computing:Box</a>
</div>
<nav class="nav">
<a href="/binary">Binary</a>
<a href="/hexadecimal">Hexadecimal</a>
<a href="/hex-colours">Hex Colours</a>
<a href="/logic-gates">Logic Gates</a>
<a href="/about">About</a>
</nav>
</div>
</header>
<style>
.siteHeader{
height: 64px;
display:flex;
align-items:center;
border-bottom: 1px solid rgba(255,255,255,.10);
background: rgba(0,0,0,.10);
backdrop-filter: blur(8px);
}
.inner{
max-width: 1200px;
width: 100%;
margin: 0 auto;
padding: 0 20px;
display:flex;
align-items:center;
justify-content: space-between;
gap: 18px;
}
.brand a{
color:#fff;
text-decoration:none;
font-weight: 800;
letter-spacing: .02em;
}
.nav{
display:flex;
gap: 16px;
flex-wrap: wrap;
}
.nav a{
color: rgba(255,255,255,.78);
text-decoration:none;
font-weight: 700;
font-size: 13px;
letter-spacing:.02em;
}
.nav a:hover{
color:#fff;
}
</style>

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@@ -1,381 +0,0 @@
---
const { mode = "unsigned", defaultBits = 8 } = Astro.props;
// For unsigned: min 1 bit, max 16 bits (tweak if you want)
const minBits = 4;
const maxBits = 16;
const initialBits = Math.min(Math.max(defaultBits, minBits), maxBits);
---
<section class="binary-sim" data-mode={mode} data-bits={initialBits}>
<div class="top">
<div class="left-brand">
<!-- Replace with your logo/img -->
<div class="brand-box" aria-hidden="true">Computing:Box</div>
</div>
<div class="display" aria-live="polite">
<div class="label">DENARY</div>
<div id="denaryNumber" class="value">0</div>
<div class="label">BINARY</div>
<div id="binaryNumber" class="value mono">00000000</div>
</div>
<div class="actions">
<button class="btn" type="button" data-action="custom-binary">Custom Binary</button>
<button class="btn" type="button" data-action="custom-denary">Custom Denary</button>
<button class="btn" type="button" data-action="shift-left">Left Shift</button>
<button class="btn" type="button" data-action="shift-right">Right Shift</button>
<div class="bits-control">
<div class="bits-title">Bits</div>
<div class="bits-buttons">
<button class="btn small" type="button" data-action="bits-minus" aria-label="Decrease bits"></button>
<span id="bitsCount" class="bits-count">{initialBits}</span>
<button class="btn small" type="button" data-action="bits-plus" aria-label="Increase bits">+</button>
</div>
</div>
</div>
</div>
<div id="bitsRow" class="bits-row" aria-label="Binary bit switches"></div>
</section>
<script is:inline>
(() => {
const root = document.currentScript.closest(".binary-sim");
const bitsRow = root.querySelector("#bitsRow");
const binaryEl = root.querySelector("#binaryNumber");
const denaryEl = root.querySelector("#denaryNumber");
const bitsCountEl = root.querySelector("#bitsCount");
let bitCount = parseInt(root.dataset.bits || "8", 10);
const minBits = 4;
const maxBits = 16;
// state: array of 0/1, MSB at index 0
let bits = new Array(bitCount).fill(0);
function placeValues(n) {
// unsigned place values: [2^(n-1), ..., 2^0]
return Array.from({ length: n }, (_, i) => 2 ** (n - 1 - i));
}
function bitsToDenary(bitsArr) {
const pv = placeValues(bitsArr.length);
return bitsArr.reduce((acc, b, i) => acc + (b ? pv[i] : 0), 0);
}
function render() {
const binaryStr = bits.join("");
binaryEl.textContent = binaryStr;
denaryEl.textContent = String(bitsToDenary(bits));
bitsCountEl.textContent = String(bitCount);
const pv = placeValues(bitCount);
bitsRow.innerHTML = pv.map((value, i) => {
const id = `bit_${bitCount}_${i}`;
const checked = bits[i] === 1 ? "checked" : "";
return `
<div class="bit-col">
<div class="bulb ${bits[i] ? "on" : "off"}" aria-hidden="true"></div>
<div class="place">${value}</div>
<label class="switch" for="${id}">
<input id="${id}" type="checkbox" ${checked} data-index="${i}">
<span class="slider" aria-hidden="true"></span>
<span class="sr-only">Toggle bit value ${value}</span>
</label>
</div>
`;
}).join("");
}
function setBitsFromBinaryString(str) {
// allow shorter input; pad left
const clean = (str || "").trim();
if (!/^[01]+$/.test(clean) || clean.length > bitCount) return false;
const padded = clean.padStart(bitCount, "0");
bits = padded.split("").map(c => c === "1" ? 1 : 0);
return true;
}
function setBitsFromDenary(num) {
if (!Number.isInteger(num)) return false;
const max = (2 ** bitCount) - 1;
if (num < 0 || num > max) return false;
const bin = num.toString(2).padStart(bitCount, "0");
bits = bin.split("").map(c => c === "1" ? 1 : 0);
return true;
}
function shiftLeft() {
bits = bits.slice(1).concat(0);
}
function shiftRight() {
bits = [0].concat(bits.slice(0, -1));
}
function resizeBits(newCount) {
const clamped = Math.max(minBits, Math.min(maxBits, newCount));
if (clamped === bitCount) return;
// keep value as best as possible: preserve LSBs when resizing
const currentBinary = bits.join("");
bitCount = clamped;
bits = new Array(bitCount).fill(0);
const take = currentBinary.slice(-bitCount);
setBitsFromBinaryString(take);
}
// Switch input handler
bitsRow.addEventListener("change", (e) => {
const input = e.target;
if (!(input instanceof HTMLInputElement)) return;
const idx = parseInt(input.dataset.index || "-1", 10);
if (idx < 0) return;
bits[idx] = input.checked ? 1 : 0;
render();
});
// Button actions
root.querySelector(".actions").addEventListener("click", (e) => {
const btn = e.target.closest("button[data-action]");
if (!btn) return;
const action = btn.dataset.action;
if (action === "custom-binary") {
const entered = prompt(`Enter a ${bitCount}-bit binary value (0s and 1s):`, bits.join(""));
if (entered === null) return;
if (!setBitsFromBinaryString(entered)) {
alert(`Invalid binary. Use only 0 and 1, up to ${bitCount} digits.`);
return;
}
render();
}
if (action === "custom-denary") {
const max = (2 ** bitCount) - 1;
const entered = prompt(`Enter a denary value (0 to ${max}):`, String(bitsToDenary(bits)));
if (entered === null) return;
const num = Number.parseInt(entered, 10);
if (!setBitsFromDenary(num)) {
alert(`Invalid denary. Enter a whole number from 0 to ${max}.`);
return;
}
render();
}
if (action === "shift-left") { shiftLeft(); render(); }
if (action === "shift-right") { shiftRight(); render(); }
if (action === "bits-minus") { resizeBits(bitCount - 1); render(); }
if (action === "bits-plus") { resizeBits(bitCount + 1); render(); }
});
// initial
render();
})();
</script>
<style>
/* Layout */
.binary-sim {
padding: 2rem 1rem 3rem;
}
.top {
display: grid;
grid-template-columns: 260px 1fr 220px;
gap: 1.5rem;
align-items: start;
}
@media (max-width: 980px) {
.top {
grid-template-columns: 1fr;
}
.actions {
display: grid;
grid-template-columns: 1fr 1fr;
}
}
/* Brand placeholder */
.brand-box {
width: 180px;
height: 180px;
border-radius: 12px;
display: grid;
place-items: center;
font-weight: 700;
opacity: 0.9;
border: 1px solid rgba(255,255,255,0.08);
background: rgba(255,255,255,0.04);
}
/* Display */
.display {
text-align: center;
padding: 1rem;
}
.label {
letter-spacing: 0.12em;
opacity: 0.85;
margin-top: 0.5rem;
}
.value {
font-size: 3rem;
line-height: 1.1;
margin: 0.25rem 0 0.75rem;
font-weight: 700;
}
.mono {
font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}
/* Buttons */
.actions {
display: flex;
flex-direction: column;
gap: 0.75rem;
}
.btn {
border: 0;
border-radius: 10px;
padding: 0.75rem 1rem;
font-weight: 600;
cursor: pointer;
background: rgba(255,255,255,0.08);
color: inherit;
}
.btn:hover { background: rgba(255,255,255,0.12); }
.btn.small {
padding: 0.45rem 0.75rem;
border-radius: 10px;
}
.bits-control {
margin-top: 0.25rem;
padding-top: 0.5rem;
border-top: 1px solid rgba(255,255,255,0.08);
}
.bits-title { opacity: 0.8; margin-bottom: 0.35rem; }
.bits-buttons {
display: flex;
align-items: center;
gap: 0.5rem;
}
.bits-count {
min-width: 2ch;
text-align: center;
font-weight: 700;
}
/* Bits row */
.bits-row {
margin-top: 2rem;
display: grid;
grid-template-columns: repeat(auto-fit, minmax(88px, 1fr));
gap: 1.25rem;
align-items: end;
}
.bit-col {
text-align: center;
padding: 0.5rem 0.25rem;
}
.place {
margin: 0.5rem 0 0.5rem;
font-size: 2rem;
font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}
/* Bulb */
.bulb {
width: 26px;
height: 26px;
margin: 0 auto 0.25rem;
border-radius: 50%;
border: 1px solid rgba(255,255,255,0.15);
}
.bulb.off { opacity: 0.15; }
.bulb.on { opacity: 1; }
/* Light switch (accessible checkbox) */
.switch {
display: inline-flex;
align-items: center;
justify-content: center;
width: 64px;
height: 36px;
position: relative;
}
.switch input {
position: absolute;
opacity: 0;
width: 1px;
height: 1px;
}
.slider {
width: 64px;
height: 36px;
border-radius: 999px;
background: rgba(255,255,255,0.10);
border: 1px solid rgba(255,255,255,0.14);
position: relative;
transition: transform 120ms ease, background 120ms ease;
}
.slider::after {
content: "";
position: absolute;
top: 4px;
left: 4px;
width: 28px;
height: 28px;
border-radius: 999px;
background: rgba(255,255,255,0.85);
transition: transform 120ms ease;
}
.switch input:checked + .slider {
background: rgba(255,255,255,0.18);
}
.switch input:checked + .slider::after {
transform: translateX(28px);
}
/* focus */
.switch input:focus-visible + .slider {
outline: 3px solid rgba(255,255,255,0.35);
outline-offset: 2px;
}
.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;
}
</style>

View File

@@ -1,17 +1,41 @@
--- ---
// src/layouts/BaseLayout.astro
const { title = "Computing:Box" } = Astro.props; const { title = "Computing:Box" } = Astro.props;
--- ---
<!doctype html> <!doctype html>
<html lang="en"> <html lang="en">
<head> <head>
<meta charset="utf-8" /> <meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" /> <meta name="viewport" content="width=device-width,initial-scale=1" />
<title>{title}</title> <title>{title}</title>
<link rel="stylesheet" href="/styles.css" /> <link rel="stylesheet" href="/src/styles/site.css" />
<link rel="stylesheet" href="/fonts/DSEG7Classic-Regular.css"> </head>
</head>
<body> <body>
<slot /> <header class="site-header">
</body> <div class="site-header__inner">
</html> <div class="brand">Computing:Box</div>
<nav class="nav">
<a class="nav__link" href="/binary">Binary</a>
<a class="nav__link" href="/hexadecimal">Hexadecimal</a>
<a class="nav__link" href="/hex-colours">Hex Colours</a>
<a class="nav__link" href="/logic-gates">Logic Gates</a>
<a class="nav__link" href="/about">About</a>
</nav>
</div>
</header>
<main class="site-main">
<slot />
</main>
<footer class="site-footer">
<div class="site-footer__inner">
<div>Computer Science Concept Simulators</div>
<div>© 2025 Computing:Box · Created with 💜 by Mr Lyall</div>
<div>Powered by ADCM Networks</div>
</div>
</footer>
</body>
</html>

View File

@@ -1,642 +1,132 @@
--- ---
/** import "../styles/binary.css";
* src/pages/binary.astro
* Single-file binary simulator (Unsigned + Two's complement) // ✅ Vite-bundled JS URL (works in dev + build + preview)
* Bit width: 4..64 import binaryScriptUrl from "../scripts/binary.js?url";
*
* Requires: // If you already have a site-wide Layout that adds header/footer,
* public/fonts/DSEG7Classic-Regular.woff // wrap the page with it here.
* public/fonts/DSEG7Classic-Regular.ttf // Example (uncomment and adjust if you have it):
*/ // import Layout from "../layouts/Layout.astro";
--- ---
<!doctype html>
<html lang="en"> <html lang="en">
<head> <head>
<meta charset="utf-8" /> <meta charset="utf-8" />
<meta name="viewport" content="width=device-width,initial-scale=1" /> <meta name="viewport" content="width=device-width,initial-scale=1" />
<title>Binary | Computing:Box</title> <title>Binary | Computing:Box</title>
<style>
:root{
--bg: #1f2027;
--panel: #22242d;
--panel2:#262833;
--text: #e8e8ee;
--muted: #a9acb8;
--accent: #33ff7a;
--accent-dim: rgba(51,255,122,.15);
--line: rgba(255,255,255,.12);
}
@font-face{
font-family: "DSEG7ClassicRegular";
src:
url("/fonts/DSEG7Classic-Regular.woff") format("woff"),
url("/fonts/DSEG7Classic-Regular.ttf") format("truetype");
font-weight: 400;
font-style: normal;
font-display: swap;
}
body{
margin:0;
font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
background: var(--bg);
color: var(--text);
}
.wrap{
max-width: 1200px;
margin: 0 auto;
padding: 32px 20px 60px;
}
/* Layout: readout left, settings panel right (like your screenshot) */
.layout{
display:grid;
grid-template-columns: 1fr 360px;
gap: 22px;
align-items:start;
}
.readout{
text-align:center;
padding: 10px 10px 0;
}
.label{
letter-spacing: .18em;
font-weight: 700;
color: var(--muted);
text-transform: uppercase;
font-size: 16px;
margin-top: 8px;
}
.num{
font-family: "DSEG7ClassicRegular", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
font-weight: 400;
color: var(--accent);
text-shadow: 0 0 18px var(--accent-dim);
}
.value{
font-size: 70px;
line-height: 1.0;
margin: 6px 0 16px;
}
.binary{
font-size: 54px;
letter-spacing: .12em;
word-break: break-all;
}
/* Buttons under readout (as requested) */
.controls{
margin-top: 16px;
display:flex;
gap: 12px;
justify-content:center;
flex-wrap:wrap;
}
.btn{
background: rgba(255,255,255,.06);
border: 1px solid rgba(255,255,255,.14);
color: #fff;
padding: 12px 14px;
border-radius: 12px;
font-weight: 700;
cursor: pointer;
min-width: 160px;
}
.btn:active{ transform: translateY(1px); }
/* Settings panel cards */
.panel{
background: rgba(255,255,255,.04);
border: 1px solid rgba(255,255,255,.10);
border-radius: 14px;
padding: 16px 16px 14px;
margin-bottom: 14px;
}
.panelTitle{
font-size: 12px;
letter-spacing: .16em;
text-transform: uppercase;
color: var(--muted);
font-weight: 800;
margin-bottom: 10px;
}
.panelRow{
display:flex;
align-items:center;
justify-content:space-between;
gap: 12px;
}
.hint{
color: var(--muted);
font-size: 12px;
margin-top: 10px;
line-height: 1.35;
}
/* Reusable toggle switch (for MODE and for each BIT) */
.switch{
position: relative;
width: 56px;
height: 34px;
display:inline-block;
flex: 0 0 auto;
}
.switch input{
opacity:0;
width:0;
height:0;
}
.slider{
position:absolute;
inset:0;
background: rgba(255,255,255,.10);
border: 1px solid rgba(255,255,255,.14);
border-radius: 999px;
transition: .18s ease;
}
.slider::before{
content:"";
position:absolute;
height: 28px;
width: 28px;
left: 3px;
top: 2px;
background: rgba(255,255,255,.92);
border-radius: 50%;
transition: .18s ease;
}
.switch input:checked + .slider{
background: rgba(51,255,122,.20);
border-color: rgba(51,255,122,.55);
}
.switch input:checked + .slider::before{
transform: translateX(22px);
background: var(--accent);
}
/* Bit width controls */
.bwControls{
display:grid;
grid-template-columns: 44px 1fr 44px;
gap: 10px;
align-items:center;
margin-top: 8px;
}
.bwBtn{
width: 44px;
height: 44px;
border-radius: 12px;
border: 1px solid rgba(255,255,255,.14);
background: rgba(255,255,255,.06);
color: #fff;
font-weight: 900;
cursor: pointer;
}
.bwBtn:active{ transform: translateY(1px); }
.bwInput{
display:flex;
align-items:center;
justify-content:space-between;
gap: 12px;
background: rgba(255,255,255,.05);
border: 1px solid rgba(255,255,255,.12);
border-radius: 12px;
padding: 10px 12px;
}
.bwLabel{
color: var(--muted);
font-size: 12px;
letter-spacing: .14em;
text-transform: uppercase;
font-weight: 800;
}
.bwField{
width: 100px;
text-align:right;
background: transparent;
border: none;
outline: none;
color: var(--accent);
font-family: "DSEG7ClassicRegular", ui-monospace, monospace;
font-size: 26px;
padding: 0;
}
.bwField::-webkit-outer-spin-button,
.bwField::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.bwField[type=number] { -moz-appearance: textfield; }
/* Bits grid */
.bits{
margin-top: 34px;
padding-top: 26px;
border-top: 1px solid var(--line);
display:grid;
gap: 18px;
align-items:end;
text-align:center;
}
.bit{
display:flex;
flex-direction:column;
align-items:center;
gap: 10px;
padding: 8px 4px;
}
.bitVal{
font-size: 34px;
color: var(--text);
opacity: .95;
}
/* Bulb (must come back!) */
.bulb{
width: 22px;
height: 22px;
border-radius: 50%;
background: rgba(255,255,255,.08);
border: 1px solid rgba(255,255,255,.12);
box-shadow: none;
margin-bottom: 6px;
}
.bulb.on{
background: #ffd86b;
border-color: rgba(255,216,107,.7);
box-shadow: 0 0 18px rgba(255,216,107,.6);
}
/* Responsive */
@media (max-width: 1000px){
.layout{ grid-template-columns: 1fr; }
.value{ font-size: 60px; }
.binary{ font-size: 44px; }
}
@media (max-width: 900px){
.value{ font-size: 54px; }
.binary{ font-size: 36px; }
.btn{ min-width: 140px; }
}
</style>
</head> </head>
<body> <body>
<!-- If using Layout, do:
<Layout title="Binary | Computing:Box">
...everything inside <main>...
</Layout>
-->
<main class="wrap"> <main class="wrap">
<section class="layout"> <section class="topGrid">
<!-- LEFT: readout + buttons --> <!-- LEFT -->
<div> <div>
<div class="readout"> <div class="readout">
<div class="label">Denary</div> <div class="label">Denary</div>
<div id="denaryNumber" class="value num">0</div> <div id="denaryNumber" class="num denaryValue">0</div>
<div class="label">Binary</div> <div class="label">Binary</div>
<div id="binaryNumber" class="value binary num">00000000</div> <div id="binaryNumber" class="num binaryValue">0</div>
<div class="controls"> <!-- Custom buttons on one line -->
<button class="btn" id="btnCustomBinary" type="button">Custom Binary</button> <div class="controlsStack">
<button class="btn" id="btnCustomDenary" type="button">Custom Denary</button> <div class="controlsRow">
<button class="btn" id="btnShiftLeft" type="button">Left Shift</button> <button class="btn btnAccent" id="btnCustomBinary" type="button">Custom Binary</button>
<button class="btn" id="btnShiftRight" type="button">Right Shift</button> <button class="btn btnAccent" id="btnCustomDenary" type="button">Custom Denary</button>
</div>
<!-- Shift buttons on another line -->
<div class="controlsRow">
<button class="btn" id="btnShiftLeft" type="button">Left Shift</button>
<button class="btn" id="btnShiftRight" type="button">Right Shift</button>
</div>
</div> </div>
</div> </div>
<!-- Bits grid (built by JS so bit-width 4..64 works) --> <div class="divider"></div>
<section id="bitsGrid" class="bits" aria-label="Bit switches"></section>
<section class="bitsWrap" aria-label="Bit switches">
<div class="bitsGrid" id="bitsGrid"></div>
</section>
</div> </div>
<!-- RIGHT: settings panel --> <!-- RIGHT -->
<aside> <aside class="panelCol">
<div class="panel"> <div class="card">
<div class="panelTitle">Mode</div> <div class="cardTitle">Mode</div>
<div class="panelRow">
<span style="font-weight:800;">Unsigned</span>
<!-- MODE TOGGLE uses SAME switch style --> <div class="toggleRow">
<label class="switch" aria-label="Toggle Two's complement mode"> <div class="toggleLabel" id="lblUnsigned">Unsigned</div>
<label class="switch" aria-label="Toggle mode">
<input id="modeToggle" type="checkbox" /> <input id="modeToggle" type="checkbox" />
<span class="slider"></span> <span class="slider"></span>
</label> </label>
<span style="font-weight:800;">Twos complement</span> <div class="toggleLabel" id="lblTwos">Two&rsquo;s complement</div>
</div> </div>
<div class="hint">
Tip: In twos complement, the left-most bit (MSB) represents a negative value. <div class="hint" id="modeHint">
Tip: In unsigned binary, all bits represent positive values.
</div> </div>
</div> </div>
<div class="panel"> <!-- Tools: arrows on one row, Reset+Random on one row -->
<div class="panelTitle">Bit width</div> <div class="card">
<div class="cardTitle">Tools</div>
<div class="bwControls"> <div class="toolRow">
<button class="bwBtn" id="btnBitsDown" type="button" aria-label="Decrease bits"></button> <button class="toolBtn toolSpin" id="btnDec" type="button" aria-label="Decrement"></button>
<button class="toolBtn toolSpin" id="btnInc" type="button" aria-label="Increment">▲</button>
</div>
<div class="bwInput"> <div class="toolRow2">
<div class="bwLabel">Bits</div> <button class="toolBtn" id="btnClear" type="button">Reset</button>
<button class="toolBtn" id="btnRandom" type="button">Random</button>
</div>
<div class="hint">Random runs briefly then stops automatically.</div>
</div>
<div class="card">
<div class="cardTitle">Bit width</div>
<div class="bitWidthRow">
<button class="miniBtn" id="btnBitsDown" type="button" aria-label="Decrease bits"></button>
<div class="bitInputWrap">
<div class="bitInputLabel">Bits</div>
<input <input
id="bitsField" id="bitsInput"
class="bwField" class="bitInput"
type="number" type="number"
min="4" inputmode="numeric"
min="1"
max="64" max="64"
step="1" step="1"
value="8" value="8"
inputmode="numeric" aria-label="Number of bits"
/> />
</div> </div>
<button class="bwBtn" id="btnBitsUp" type="button" aria-label="Increase bits">+</button> <button class="miniBtn" id="btnBitsUp" type="button" aria-label="Increase bits">+</button>
</div> </div>
<div class="hint"> <div class="hint">Minimum 1 bit, maximum 64 bits.</div>
Minimum 4 bits, maximum 64 bits.
</div>
</div> </div>
</aside> </aside>
</section> </section>
</main> </main>
<script type="module"> <!-- ✅ correct bundled JS reference -->
// ---------- State ---------- <script type="module" src={binaryScriptUrl}></script>
let bitsCount = 8; // 4..64
let isTwos = false; // false = unsigned
let bitStates = []; // MSB -> LSB booleans
// ---------- Helpers ----------
function clamp(n, min, max){ return Math.min(max, Math.max(min, n)); }
function pow2(n){
// for up to 64 bits, Number is still OK for *visual simulator*.
// if you later want exact 64-bit maths, swap to BigInt end-to-end.
return 2 ** n;
}
function getPlaceValues(){
// MSB -> LSB
// Unsigned: [2^(n-1), ..., 1]
// Two's: [-2^(n-1), 2^(n-2), ..., 1]
const vals = [];
for (let i = 0; i < bitsCount; i++){
const power = bitsCount - 1 - i;
if (isTwos && i === 0){
vals.push(-pow2(power));
} else {
vals.push(pow2(power));
}
}
return vals;
}
function binaryString(){
return bitStates.map(b => (b ? "1" : "0")).join("");
}
function denaryValue(){
const values = getPlaceValues();
let sum = 0;
for (let i = 0; i < bitsCount; i++){
if (bitStates[i]) sum += values[i];
}
return sum;
}
function rangeForMode(){
if (!isTwos){
return { min: 0, max: pow2(bitsCount) - 1 };
}
return { min: -pow2(bitsCount - 1), max: pow2(bitsCount - 1) - 1 };
}
function updateReadout(){
document.getElementById("binaryNumber").innerText = binaryString();
document.getElementById("denaryNumber").innerText = String(denaryValue());
// bulb on/off updates:
for (let i = 0; i < bitsCount; i++){
const bulb = document.getElementById(`bulb-${i}`);
if (bulb) bulb.classList.toggle("on", !!bitStates[i]);
}
}
// ---------- DOM build for bits grid ----------
function setBitsGridColumns(){
const grid = document.getElementById("bitsGrid");
// make it adapt (up to 16 per row max, then wraps)
const cols = clamp(bitsCount, 4, 16);
grid.style.gridTemplateColumns = `repeat(${cols}, 1fr)`;
}
function buildBitsGrid(){
const grid = document.getElementById("bitsGrid");
grid.innerHTML = "";
setBitsGridColumns();
const values = getPlaceValues();
for (let i = 0; i < bitsCount; i++){
const v = values[i];
const bit = document.createElement("div");
bit.className = "bit";
const bulb = document.createElement("div");
bulb.className = "bulb";
bulb.id = `bulb-${i}`;
bulb.setAttribute("aria-hidden", "true");
const val = document.createElement("div");
val.className = "bitVal num";
// show absolute label for MSB in twos? No — show the actual negative value (clear to students).
val.textContent = String(v);
// IMPORTANT: bit switch must be the SAME style as MODE switch
const label = document.createElement("label");
label.className = "switch";
label.setAttribute("aria-label", `Toggle bit ${v}`);
const input = document.createElement("input");
input.type = "checkbox";
input.dataset.index = String(i);
input.checked = !!bitStates[i];
const slider = document.createElement("span");
slider.className = "slider";
input.addEventListener("change", () => {
bitStates[i] = input.checked;
updateReadout();
});
label.appendChild(input);
label.appendChild(slider);
bit.appendChild(bulb);
bit.appendChild(val);
bit.appendChild(label);
grid.appendChild(bit);
}
updateReadout();
}
// ---------- Set state from binary / denary ----------
function setFromBinary(bin){
const clean = String(bin).replace(/\s+/g, "");
if (!/^[01]+$/.test(clean)) return false;
const padded = clean.slice(-bitsCount).padStart(bitsCount, "0");
bitStates = [...padded].map(ch => ch === "1");
// update toggles without rebuilding
for (let i = 0; i < bitsCount; i++){
const toggle = document.querySelector(`input[type="checkbox"][data-index="${i}"]`);
if (toggle) toggle.checked = bitStates[i];
}
updateReadout();
return true;
}
function setFromDenary(n){
const num = Number(n);
if (!Number.isInteger(num)) return false;
const { min, max } = rangeForMode();
if (num < min || num > max) return false;
// convert to bit pattern
let unsignedVal;
if (!isTwos){
unsignedVal = num;
} else {
// two's complement representation
unsignedVal = num < 0 ? (pow2(bitsCount) + num) : num;
}
// build MSB->LSB bits from unsignedVal
const newBits = [];
for (let i = 0; i < bitsCount; i++){
const power = bitsCount - 1 - i;
const bit = Math.floor(unsignedVal / pow2(power)) % 2;
newBits.push(bit === 1);
}
bitStates = newBits;
for (let i = 0; i < bitsCount; i++){
const toggle = document.querySelector(`input[type="checkbox"][data-index="${i}"]`);
if (toggle) toggle.checked = bitStates[i];
}
updateReadout();
return true;
}
// ---------- Shifts ----------
function shiftLeft(){
// logical left shift: drop MSB, add 0 at LSB
bitStates = bitStates.slice(1).concat(false);
buildBitsGrid(); // rebuild keeps labels correct if mode changed (also updates bulbs)
}
function shiftRight(){
if (!isTwos){
// logical right shift
bitStates = [false].concat(bitStates.slice(0, -1));
} else {
// arithmetic right shift (preserve MSB)
const msb = bitStates[0];
bitStates = [msb].concat(bitStates.slice(0, -1));
}
buildBitsGrid();
}
// ---------- Bit width ----------
function applyBitsCount(next){
const wanted = clamp(Number(next) || 8, 4, 64);
if (wanted === bitsCount) return;
// keep the right-most (LSB) bits when resizing (feels natural)
const old = binaryString();
bitsCount = wanted;
// rebuild state from old binary, keeping LSBs
const padded = old.slice(-bitsCount).padStart(bitsCount, "0");
bitStates = [...padded].map(ch => ch === "1");
document.getElementById("bitsField").value = String(bitsCount);
buildBitsGrid();
}
// ---------- Mode toggle ----------
function applyMode(nextIsTwos){
const prevDenary = denaryValue(); // keep the *value* if possible
isTwos = !!nextIsTwos;
// Try to keep the denary value, but clamp if it becomes invalid in the new mode
const { min, max } = rangeForMode();
const kept = clamp(prevDenary, min, max);
setFromDenary(kept);
buildBitsGrid();
}
// ---------- Wire up UI ----------
function wireUI(){
document.getElementById("btnShiftLeft").addEventListener("click", shiftLeft);
document.getElementById("btnShiftRight").addEventListener("click", shiftRight);
document.getElementById("btnCustomBinary").addEventListener("click", () => {
const val = prompt(`Enter a binary number (up to ${bitsCount} bits):`);
if (val === null) return;
if (!setFromBinary(val)) alert("Invalid input. Use only 0 and 1.");
});
document.getElementById("btnCustomDenary").addEventListener("click", () => {
const { min, max } = rangeForMode();
const val = prompt(`Enter a denary number (${min} to ${max}):`);
if (val === null) return;
if (!setFromDenary(val)) alert(`Invalid input. Enter an integer from ${min} to ${max}.`);
});
// Mode toggle
const modeToggle = document.getElementById("modeToggle");
modeToggle.addEventListener("change", () => applyMode(modeToggle.checked));
// Bit width +/- and manual entry
document.getElementById("btnBitsDown").addEventListener("click", () => applyBitsCount(bitsCount - 1));
document.getElementById("btnBitsUp").addEventListener("click", () => applyBitsCount(bitsCount + 1));
const bitsField = document.getElementById("bitsField");
bitsField.addEventListener("change", () => applyBitsCount(bitsField.value));
bitsField.addEventListener("blur", () => applyBitsCount(bitsField.value));
bitsField.addEventListener("keydown", (e) => {
if (e.key === "Enter") applyBitsCount(bitsField.value);
});
}
// ---------- Init ----------
function init(){
// default: 8-bit unsigned
bitsCount = 8;
isTwos = false;
bitStates = Array(bitsCount).fill(false);
document.getElementById("modeToggle").checked = false;
document.getElementById("bitsField").value = String(bitsCount);
wireUI();
buildBitsGrid();
}
init();
</script>
</body> </body>
</html> </html>

508
src/scripts/binary.js Normal file
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@@ -0,0 +1,508 @@
// src/scripts/binary.js
// Computing:Box — Binary page logic (Unsigned + Two's Complement)
// NOTE: This file is written to match the IDs/classes in your current binary.astro HTML.
(() => {
/* -----------------------------
DOM
----------------------------- */
const bitsGrid = document.getElementById("bitsGrid");
const denaryEl = document.getElementById("denaryNumber");
const binaryEl = document.getElementById("binaryNumber");
const bitsInput = document.getElementById("bitsInput");
const modeToggle = document.getElementById("modeToggle");
const modeHint = document.getElementById("modeHint");
const lblUnsigned = document.getElementById("lblUnsigned");
const lblTwos = document.getElementById("lblTwos");
const btnCustomBinary = document.getElementById("btnCustomBinary");
const btnCustomDenary = document.getElementById("btnCustomDenary");
const btnShiftLeft = document.getElementById("btnShiftLeft");
const btnShiftRight = document.getElementById("btnShiftRight");
const btnDec = document.getElementById("btnDec");
const btnInc = document.getElementById("btnInc");
const btnClear = document.getElementById("btnClear");
const btnRandom = document.getElementById("btnRandom");
const btnBitsUp = document.getElementById("btnBitsUp");
const btnBitsDown = document.getElementById("btnBitsDown");
/* -----------------------------
STATE
----------------------------- */
let bitCount = clampInt(Number(bitsInput?.value ?? 8), 1, 64);
// bits[i] is bit value 2^i (LSB at i=0)
let bits = new Array(bitCount).fill(false);
// Random run timer (brief)
let randomTimer = null;
/* -----------------------------
HELPERS
----------------------------- */
function clampInt(n, min, max) {
if (!Number.isFinite(n)) return min;
return Math.max(min, Math.min(max, Math.trunc(n)));
}
function isTwosMode() {
return !!modeToggle?.checked;
}
function pow2Big(n) {
return 1n << BigInt(n);
}
function unsignedMaxExclusive(nBits) {
return pow2Big(nBits); // 2^n
}
function unsignedMaxValue(nBits) {
return pow2Big(nBits) - 1n;
}
function twosMin(nBits) {
return -pow2Big(nBits - 1);
}
function twosMax(nBits) {
return pow2Big(nBits - 1) - 1n;
}
function bitsToUnsignedBigInt() {
let v = 0n;
for (let i = 0; i < bitCount; i++) {
if (bits[i]) v += pow2Big(i);
}
return v;
}
function unsignedBigIntToBits(vUnsigned) {
const v = ((vUnsigned % unsignedMaxExclusive(bitCount)) + unsignedMaxExclusive(bitCount)) % unsignedMaxExclusive(bitCount);
for (let i = 0; i < bitCount; i++) {
bits[i] = ((v >> BigInt(i)) & 1n) === 1n;
}
}
function bitsToSignedBigIntTwos() {
const u = bitsToUnsignedBigInt();
const signBit = bits[bitCount - 1] === true;
if (!signBit) return u;
// negative: u - 2^n
return u - pow2Big(bitCount);
}
function signedBigIntToBitsTwos(vSigned) {
// wrap into range [-2^(n-1), 2^(n-1)-1]
const min = twosMin(bitCount);
const max = twosMax(bitCount);
const span = pow2Big(bitCount); // 2^n
let v = vSigned;
// wrap using modular arithmetic on signed domain
// Convert to unsigned representative: v mod 2^n
v = ((v % span) + span) % span;
unsignedBigIntToBits(v);
// labels/denary will show signed later
// (No further action needed here)
}
function formatBinaryGrouped() {
// MSB..LSB with a space every 4 bits (matches your screenshot 0000 0000)
let s = "";
for (let i = bitCount - 1; i >= 0; i--) {
s += bits[i] ? "1" : "0";
const posFromRight = (bitCount - i);
if (i !== 0 && posFromRight % 4 === 0) s += " ";
}
return s;
}
function updateModeHint() {
if (!modeHint) return;
if (isTwosMode()) {
modeHint.textContent = "Tip: In twos complement, the left-most bit (MSB) represents a negative value.";
} else {
modeHint.textContent = "Tip: In unsigned binary, all bits represent positive values.";
}
}
/* -----------------------------
BUILD UI (BITS)
----------------------------- */
function buildBits(count) {
bitCount = clampInt(count, 1, 64);
if (bitsInput) bitsInput.value = String(bitCount);
// reset bits array size, preserve existing LSBs where possible
const oldBits = bits.slice();
bits = new Array(bitCount).fill(false);
for (let i = 0; i < Math.min(oldBits.length, bitCount); i++) bits[i] = oldBits[i];
bitsGrid.innerHTML = "";
// If less than 8 bits, centre nicely using your CSS helper
bitsGrid.classList.toggle("bitsFew", bitCount < 8);
if (bitCount < 8) {
bitsGrid.style.setProperty("--cols", String(bitCount));
} else {
bitsGrid.style.removeProperty("--cols");
}
// Render MSB..LSB left-to-right
for (let i = bitCount - 1; i >= 0; i--) {
const bitEl = document.createElement("div");
bitEl.className = "bit";
// IMPORTANT: We render the bulb as an emoji with NO circle/ring.
// We do not rely on the .bulb CSS ring/background at all.
bitEl.innerHTML = `
<div class="bulb" id="bulb-${i}" aria-hidden="true">💡</div>
<div class="bitVal" id="bitLabel-${i}"></div>
<label class="switch" aria-label="Toggle bit ${i}">
<input type="checkbox" data-index="${i}">
<span class="slider"></span>
</label>
`;
bitsGrid.appendChild(bitEl);
}
// Hook switches
bitsGrid.querySelectorAll('input[type="checkbox"]').forEach((input) => {
input.addEventListener("change", () => {
const i = Number(input.dataset.index);
bits[i] = input.checked;
updateUI();
});
});
// Force the bulb to be "just the emoji" (removes the circle even if CSS adds it)
for (let i = 0; i < bitCount; i++) {
const bulb = document.getElementById(`bulb-${i}`);
if (!bulb) continue;
// Strip the ring/circle coming from CSS
bulb.style.width = "auto";
bulb.style.height = "auto";
bulb.style.border = "none";
bulb.style.background = "transparent";
bulb.style.borderRadius = "0";
bulb.style.boxShadow = "none";
bulb.style.opacity = "0.45";
bulb.style.fontSize = "26px";
bulb.style.lineHeight = "1";
bulb.style.display = "flex";
bulb.style.alignItems = "center";
bulb.style.justifyContent = "center";
bulb.style.filter = "grayscale(1)";
bulb.textContent = "💡";
}
updateUI();
}
/* -----------------------------
UI UPDATE (READOUT + LABELS + BULBS + SWITCHES)
----------------------------- */
function updateBitLabels() {
// Show weights under each bit.
// Unsigned: 2^i
// Two's: MSB is -2^(n-1), others are 2^i
for (let i = 0; i < bitCount; i++) {
const label = document.getElementById(`bitLabel-${i}`);
if (!label) continue;
if (isTwosMode() && i === bitCount - 1) {
label.textContent = `-${pow2Big(bitCount - 1).toString()}`;
} else {
label.textContent = pow2Big(i).toString();
}
}
}
function syncSwitchesToBits() {
bitsGrid.querySelectorAll('input[type="checkbox"]').forEach((input) => {
const i = Number(input.dataset.index);
input.checked = !!bits[i];
});
}
function updateBulbs() {
// Bulbs should ALWAYS reflect bits, regardless of mode.
for (let i = 0; i < bitCount; i++) {
const bulb = document.getElementById(`bulb-${i}`);
if (!bulb) continue;
const on = bits[i] === true;
// Make it look "lit" when on (no circle, just glow)
if (on) {
bulb.style.opacity = "1";
bulb.style.filter = "grayscale(0)";
bulb.style.textShadow = "0 0 14px rgba(255,216,107,.75), 0 0 26px rgba(255,216,107,.45)";
} else {
bulb.style.opacity = "0.45";
bulb.style.filter = "grayscale(1)";
bulb.style.textShadow = "none";
}
}
}
function updateReadout() {
if (!denaryEl || !binaryEl) return;
if (isTwosMode()) {
const signed = bitsToSignedBigIntTwos();
denaryEl.textContent = signed.toString();
} else {
const unsigned = bitsToUnsignedBigInt();
denaryEl.textContent = unsigned.toString();
}
binaryEl.textContent = formatBinaryGrouped();
}
function updateUI() {
updateModeHint();
updateBitLabels();
syncSwitchesToBits();
updateBulbs();
updateReadout();
}
/* -----------------------------
SET FROM BINARY STRING
----------------------------- */
function setFromBinaryString(binStr) {
const clean = String(binStr ?? "").replace(/\s+/g, "");
if (!/^[01]+$/.test(clean)) return false;
// Use rightmost bitCount bits; left pad with 0
const padded = clean.slice(-bitCount).padStart(bitCount, "0");
for (let i = 0; i < bitCount; i++) {
// padded is MSB..LSB, bits[] is LSB..MSB
const charFromRight = padded[padded.length - 1 - i];
bits[i] = charFromRight === "1";
}
updateUI();
return true;
}
/* -----------------------------
SET FROM DENARY INPUT
----------------------------- */
function setFromDenaryInput(vStr) {
const raw = String(vStr ?? "").trim();
if (!raw) return false;
// BigInt parse (supports negatives)
let v;
try {
// Allow normal integers only
if (!/^-?\d+$/.test(raw)) return false;
v = BigInt(raw);
} catch {
return false;
}
if (isTwosMode()) {
// Clamp to representable range
const min = twosMin(bitCount);
const max = twosMax(bitCount);
if (v < min || v > max) return false;
signedBigIntToBitsTwos(v);
} else {
// Unsigned only
if (v < 0n) return false;
if (v > unsignedMaxValue(bitCount)) return false;
unsignedBigIntToBits(v);
}
updateUI();
return true;
}
/* -----------------------------
SHIFTS
----------------------------- */
function shiftLeft() {
// logical left shift: bits move to higher index; LSB becomes 0
for (let i = bitCount - 1; i >= 1; i--) {
bits[i] = bits[i - 1];
}
bits[0] = false;
updateUI();
}
function shiftRight() {
// logical right shift: bits move to lower index; MSB becomes 0
for (let i = 0; i < bitCount - 1; i++) {
bits[i] = bits[i + 1];
}
bits[bitCount - 1] = false;
updateUI();
}
/* -----------------------------
CLEAR / INC / DEC
----------------------------- */
function clearAll() {
bits.fill(false);
updateUI();
}
function increment() {
if (isTwosMode()) {
const min = twosMin(bitCount);
const max = twosMax(bitCount);
let v = bitsToSignedBigIntTwos() + 1n;
if (v > max) v = min; // wrap
signedBigIntToBitsTwos(v);
} else {
const span = unsignedMaxExclusive(bitCount);
const v = (bitsToUnsignedBigInt() + 1n) % span;
unsignedBigIntToBits(v);
}
updateUI();
}
function decrement() {
if (isTwosMode()) {
const min = twosMin(bitCount);
const max = twosMax(bitCount);
let v = bitsToSignedBigIntTwos() - 1n;
if (v < min) v = max; // wrap
signedBigIntToBitsTwos(v);
} else {
const span = unsignedMaxExclusive(bitCount);
const v = (bitsToUnsignedBigInt() - 1n + span) % span;
unsignedBigIntToBits(v);
}
updateUI();
}
/* -----------------------------
RANDOM (FIXED: NO BigInt->Number Math.min)
----------------------------- */
function cryptoRandomBigInt(maxExclusive) {
// returns 0 <= x < maxExclusive
if (maxExclusive <= 0n) return 0n;
const bitLen = maxExclusive.toString(2).length;
const byteLen = Math.ceil(bitLen / 8);
// Rejection sampling
while (true) {
const bytes = new Uint8Array(byteLen);
crypto.getRandomValues(bytes);
let x = 0n;
for (const b of bytes) {
x = (x << 8n) | BigInt(b);
}
// mask down to bitLen to reduce rejections slightly
const extraBits = BigInt(byteLen * 8 - bitLen);
if (extraBits > 0n) x = x >> extraBits;
if (x < maxExclusive) return x;
}
}
function setRandomOnce() {
if (isTwosMode()) {
const span = unsignedMaxExclusive(bitCount); // 2^n
const u = cryptoRandomBigInt(span); // 0..2^n-1
unsignedBigIntToBits(u);
} else {
const span = unsignedMaxExclusive(bitCount);
const u = cryptoRandomBigInt(span);
unsignedBigIntToBits(u);
}
updateUI();
}
function runRandomBriefly() {
// stop any existing run
if (randomTimer) {
clearInterval(randomTimer);
randomTimer = null;
}
const start = Date.now();
const durationMs = 900; // brief run then stop
const tickMs = 80;
randomTimer = setInterval(() => {
setRandomOnce();
if (Date.now() - start >= durationMs) {
clearInterval(randomTimer);
randomTimer = null;
}
}, tickMs);
}
/* -----------------------------
BIT WIDTH CONTROLS
----------------------------- */
function setBitWidth(n) {
const v = clampInt(n, 1, 64);
buildBits(v);
}
/* -----------------------------
EVENTS
----------------------------- */
modeToggle?.addEventListener("change", () => {
updateUI();
});
btnCustomBinary?.addEventListener("click", () => {
const v = prompt(`Enter binary (spaces allowed). Current width: ${bitCount} bits`);
if (v === null) return;
if (!setFromBinaryString(v)) alert("Invalid binary");
});
btnCustomDenary?.addEventListener("click", () => {
const v = prompt(
isTwosMode()
? `Enter denary (${twosMin(bitCount).toString()} to ${twosMax(bitCount).toString()}):`
: `Enter denary (0 to ${unsignedMaxValue(bitCount).toString()}):`
);
if (v === null) return;
if (!setFromDenaryInput(v)) alert("Invalid denary for current mode/bit width");
});
btnShiftLeft?.addEventListener("click", shiftLeft);
btnShiftRight?.addEventListener("click", shiftRight);
btnInc?.addEventListener("click", increment);
btnDec?.addEventListener("click", decrement);
btnClear?.addEventListener("click", clearAll);
btnRandom?.addEventListener("click", runRandomBriefly);
btnBitsUp?.addEventListener("click", () => setBitWidth(bitCount + 1));
btnBitsDown?.addEventListener("click", () => setBitWidth(bitCount - 1));
bitsInput?.addEventListener("change", () => {
setBitWidth(Number(bitsInput.value));
});
/* -----------------------------
INIT
----------------------------- */
updateModeHint();
buildBits(bitCount);
})();

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@@ -1,54 +0,0 @@
let bits = [128,64,32,16,8,4,2,1];
let state = Array(8).fill(0);
const denaryEl = document.getElementById("denaryNumber");
const binaryEl = document.getElementById("binaryNumber");
const bitEls = document.querySelectorAll(".bit");
bitEls.forEach((el, i) => {
el.addEventListener("click", () => {
state[i] = state[i] ? 0 : 1;
el.classList.toggle("on");
update();
});
});
function update() {
const denary = state.reduce((sum, bit, i) => sum + bit * bits[i], 0);
denaryEl.textContent = denary;
binaryEl.textContent = state.join("");
}
function requestBinary() {
const input = prompt("Enter 8-bit binary:");
if (!/^[01]{8}$/.test(input)) return;
state = input.split("").map(Number);
bitEls.forEach((el,i)=>el.classList.toggle("on",state[i]));
update();
}
function requestDenary() {
const input = parseInt(prompt("Enter denary (0255)"),10);
if (isNaN(input) || input < 0 || input > 255) return;
let value = input;
state = bits.map(b => {
if (value >= b) {
value -= b;
return 1;
}
return 0;
});
bitEls.forEach((el,i)=>el.classList.toggle("on",state[i]));
update();
}
function shiftBinary(dir) {
if (dir === "left") state.shift(), state.push(0);
if (dir === "right") state.pop(), state.unshift(0);
bitEls.forEach((el,i)=>el.classList.toggle("on",state[i]));
update();
}
update();

View File

@@ -1,52 +0,0 @@
/* src/styles/base.css */
@import "./md3-tokens.css";
html, body{ height:100%; }
body{
margin:0;
font-family: var(--font-sans);
background: var(--md-surface-2);
color: var(--md-on-surface);
}
a{ color: var(--md-primary); text-decoration: none; }
a:hover{ text-decoration: underline; }
.container{
max-width: 1100px;
margin: 0 auto;
padding: 16px;
}
.card{
background: var(--md-surface);
border: 1px solid var(--md-outline);
border-radius: var(--radius-2);
box-shadow: var(--shadow-1);
padding: 16px;
}
.btn{
display:inline-flex;
gap:8px;
align-items:center;
justify-content:center;
border-radius: 999px;
border: 1px solid var(--md-outline);
background: var(--md-surface);
color: var(--md-on-surface);
padding: 10px 14px;
font-weight: 600;
cursor: pointer;
}
.btn:hover{ filter: brightness(0.98); }
.btn:focus{ outline:none; box-shadow: var(--md-focus); }
.btn-primary{
background: var(--md-primary);
color: var(--md-on-primary);
border-color: transparent;
}
.badge{
display:inline-block;
padding: 2px 10px;
border-radius: 999px;
font-size: 12px;
border: 1px solid var(--md-outline);
background: var(--md-surface-2);
}
code, pre{ font-family: var(--font-mono); }

View File

@@ -1,68 +1,386 @@
.binary-container { :root{
max-width: 1100px; --bg: #1f2027;
margin: auto; --panel2: rgba(255,255,255,.04);
padding: 2rem; --text: #e8e8ee;
color: #e0e0e0; --muted: #a9acb8;
--accent: #33ff7a;
--accent-dim: rgba(51,255,122,.15);
--line: rgba(255,255,255,.12);
--danger: #e24444;
--danger-dim: rgba(226,68,68,.22);
--success: #2fd66b;
--success-dim: rgba(47,214,107,.22);
} }
.display { /* -------- Fonts -------- */
text-align: center; @font-face{
font-family: "DSEG7ClassicRegular";
src:
url("/fonts/DSEG7Classic-Regular.woff") format("woff"),
url("/fonts/DSEG7Classic-Regular.ttf") format("truetype");
font-weight: 400;
font-style: normal;
font-display: swap;
} }
.label { @font-face{
font-size: 1.2rem; font-family: "SevenSegment";
opacity: 0.7; src:
url("/fonts/Seven-Segment.woff2") format("woff2"),
url("/fonts/Seven-Segment.woff") format("woff");
font-weight: 400;
font-style: normal;
font-display: swap;
} }
.number { body{
font-size: 3rem; margin:0;
margin-bottom: 1rem; font-family: "SevenSegment", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
color: #00ff66; background: var(--bg);
color: var(--text);
} }
.controls { .wrap{
margin-top: 1rem; max-width: 1200px;
margin: 0 auto;
padding: 32px 20px 60px;
} }
.controls button { .topGrid{
margin: 0.25rem; display:grid;
padding: 0.6rem 1rem; grid-template-columns: 1fr 340px;
font-size: 1rem; gap: 28px;
align-items:start;
} }
.bits { .readout{
display: grid; text-align:center;
grid-template-columns: repeat(8, 1fr); padding: 10px 10px 0;
gap: 1rem;
margin-top: 3rem;
} }
.bit { .label{
width: 40px; letter-spacing: .18em;
height: 80px; font-weight: 700;
background: #333; color: var(--muted);
border-radius: 20px; text-transform: uppercase;
position: relative; font-size: 14px;
margin-top: 10px;
}
/* Anything that is a number uses DSEG7 */
.num{
font-family: "DSEG7ClassicRegular", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
font-weight: 400;
color: var(--accent);
text-shadow: 0 0 18px var(--accent-dim);
}
.denaryValue{
font-size: 70px;
line-height: 1.0;
margin: 6px 0 10px;
}
.binaryValue{
font-size: 52px;
letter-spacing: .12em;
line-height: 1.0;
margin: 6px 0 14px;
white-space: pre;
}
.controlsStack{
margin-top: 10px;
display:flex;
flex-direction:column;
gap: 10px;
align-items:center;
}
.controlsRow{
display:flex;
gap: 12px;
justify-content:center;
flex-wrap:wrap;
}
.btn{
background: rgba(255,255,255,.06);
border: 1px solid rgba(255,255,255,.14);
color: #fff;
padding: 12px 14px;
border-radius: 12px;
font-weight: 700;
cursor: pointer; cursor: pointer;
min-width: 170px;
font-family: "SevenSegment", system-ui, sans-serif;
}
.btn:active{ transform: translateY(1px); }
.btnAccent{
background: rgba(51,255,122,.18);
border-color: rgba(51,255,122,.45);
} }
.bit::after { .divider{
content: ""; margin-top: 26px;
width: 32px; border-top: 1px solid var(--line);
height: 32px; }
background: #555;
.panelCol{
display:flex;
flex-direction:column;
gap: 14px;
}
.card{
background: var(--panel2);
border: 1px solid rgba(255,255,255,.10);
border-radius: 14px;
padding: 14px;
}
.cardTitle{
letter-spacing: .18em;
font-weight: 800;
color: var(--muted);
text-transform: uppercase;
font-size: 12px;
margin: 0 0 10px;
}
.hint{
color: var(--muted);
font-size: 12px;
margin-top: 8px;
line-height: 1.35;
}
.toggleRow{
display:flex;
align-items:center;
justify-content:space-between;
gap: 10px;
}
.toggleLabel{
color: var(--text);
font-weight: 700;
font-size: 14px;
font-family: "SevenSegment", system-ui, sans-serif;
}
/* Switch */
.switch{
position: relative;
width: 56px;
height: 34px;
display:inline-block;
flex: 0 0 auto;
}
.switch input{
opacity:0;
width:0;
height:0;
}
.slider{
position:absolute;
inset:0;
background: rgba(255,255,255,.10);
border: 1px solid rgba(255,255,255,.14);
border-radius: 999px;
transition: .18s ease;
}
.slider::before{
content:"";
position:absolute;
height: 28px;
width: 28px;
left: 3px;
top: 2px;
background: rgba(255,255,255,.92);
border-radius: 50%; border-radius: 50%;
position: absolute; transition: .18s ease;
bottom: 6px; }
left: 4px; .switch input:checked + .slider{
transition: all 0.2s ease; background: rgba(51,255,122,.20);
border-color: rgba(51,255,122,.55);
}
.switch input:checked + .slider::before{
transform: translateX(22px);
background: var(--accent);
} }
.bit.on { /* Tools layout */
background: #00c853; .toolRow{
display:grid;
grid-template-columns: 1fr 1fr;
gap: 10px;
margin-bottom: 10px;
}
.toolRow2{
display:grid;
grid-template-columns: 1fr 1fr;
gap: 10px;
} }
.bit.on::after { .toolBtn{
bottom: 42px; height: 48px;
background: #eaffea; border-radius: 12px;
background: rgba(255,255,255,.06);
border: 1px solid rgba(255,255,255,.14);
color: #fff;
cursor: pointer;
font-weight: 800;
font-family: "SevenSegment", system-ui, sans-serif;
}
/* Narrower arrow buttons (only the arrow pair) */
.toolSpin{
font-size: 22px;
height: 48px;
max-width: 120px; /* narrower */
justify-self: start;
padding: 0;
}
/* Down = red, Up = green */
#btnDec{
background: var(--danger-dim);
border-color: rgba(226,68,68,.45);
}
#btnInc{
background: var(--success-dim);
border-color: rgba(47,214,107,.45);
}
/* Bit width control */
.bitWidthRow{
display:grid;
grid-template-columns: 44px 1fr 44px;
gap: 10px;
align-items:center;
}
.miniBtn{
height:44px;
width:44px;
border-radius:12px;
background:rgba(255,255,255,.06);
border:1px solid rgba(255,255,255,.14);
color:#fff;
cursor:pointer;
font-weight:900;
font-size:18px;
font-family: "SevenSegment", system-ui, sans-serif;
}
.bitInputWrap{
background:rgba(255,255,255,.06);
border:1px solid rgba(255,255,255,.14);
border-radius:12px;
padding:10px 12px;
display:flex;
align-items:center;
justify-content:space-between;
gap:12px;
}
.bitInputLabel{
color:var(--muted);
font-size:12px;
font-weight:800;
letter-spacing:.18em;
text-transform:uppercase;
font-family: "SevenSegment", system-ui, sans-serif;
}
.bitInput{
width:86px;
text-align:right;
background:transparent;
border:none;
outline:none;
color:var(--accent);
font-family:"DSEG7ClassicRegular", ui-monospace, monospace;
font-size:28px;
}
.bitInput::-webkit-outer-spin-button,
.bitInput::-webkit-inner-spin-button{
-webkit-appearance:none;
margin:0;
}
/* Bits: wrap every 8, centred */
.bitsWrap{
margin-top: 22px;
}
.bitsGrid{
display:grid;
gap: 18px;
justify-content:center;
grid-template-columns: repeat(8, minmax(90px, 1fr));
padding-top: 18px;
}
.bitsGrid.bitsFew{
grid-template-columns: repeat(var(--cols, 4), minmax(90px, 1fr));
}
.bit{
display:flex;
flex-direction:column;
align-items:center;
gap: 10px;
padding: 8px 4px;
text-align:center;
}
/* Bulb (emoji only — no circle, no ::before so it won't duplicate) */
.bulb{
width: auto;
height: auto;
border: none;
background: transparent;
border-radius: 0;
box-shadow: none;
display:flex;
align-items:center;
justify-content:center;
font-size: 26px;
line-height: 1;
opacity: .45;
filter: grayscale(1);
text-shadow: none;
}
/* IMPORTANT: remove the pseudo-element that was causing the 2nd bulb */
.bulb::before{
content: none;
}
.bulb.on{
opacity: 1;
filter: grayscale(0);
text-shadow: 0 0 14px rgba(255,216,107,.75), 0 0 26px rgba(255,216,107,.45);
}
/* Bit value numbers use DSEG7 */
.bitVal{
font-family:"DSEG7ClassicRegular", ui-monospace, monospace;
font-size: 28px;
color: var(--text);
opacity: .95;
line-height: 1;
min-height: 32px;
}
@media (max-width: 980px){
.topGrid{ grid-template-columns: 1fr; }
.denaryValue{ font-size: 62px; }
.binaryValue{ font-size: 46px; }
}
@media (max-width: 520px){
.btn{ min-width: 150px; }
.bitsGrid{ grid-template-columns: repeat(4, minmax(90px, 1fr)); }
} }

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@font-face {
font-family: "DSEG7";
src: url("/fonts/DSEG7Classic-Regular.ttf") format("truetype");
font-weight: normal;
font-style: normal;
}
.dseg {
font-family: "DSEG7", monospace;
letter-spacing: 0.15em;
}

85
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:root{
--bg: #1f2027;
--panel: #22242d;
--panel2: rgba(255,255,255,.04);
--text: #e8e8ee;
--muted: #a9acb8;
--accent: #33ff7a;
--accent-dim: rgba(51,255,122,.15);
--line: rgba(255,255,255,.12);
}
*{ box-sizing:border-box; }
body{
margin:0;
font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
background: var(--bg);
color: var(--text);
}
.siteHeader{
position: sticky;
top: 0;
z-index: 10;
background: rgba(0,0,0,.15);
backdrop-filter: blur(8px);
border-bottom: 1px solid rgba(255,255,255,.06);
}
.siteHeaderInner{
max-width: 1200px;
margin: 0 auto;
padding: 14px 20px;
display:flex;
align-items:center;
justify-content:space-between;
gap: 16px;
}
.brand{
color: var(--text);
text-decoration:none;
font-weight: 900;
letter-spacing:.02em;
}
.nav{
display:flex;
gap: 14px;
flex-wrap:wrap;
justify-content:flex-end;
}
.nav a{
color: var(--muted);
text-decoration:none;
font-weight: 700;
font-size: 14px;
}
.nav a:hover{ color: var(--text); }
.siteMain{
min-height: calc(100vh - 140px);
}
.siteFooter{
border-top: 1px solid rgba(255,255,255,.08);
margin-top: 32px;
background: rgba(0,0,0,.10);
}
.siteFooterInner{
max-width: 1200px;
margin: 0 auto;
padding: 18px 20px 26px;
color: var(--muted);
font-size: 12px;
line-height: 1.6;
}
.footerTitle{
color: var(--text);
opacity:.9;
font-weight: 800;
margin-bottom: 6px;
}

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/* src/styles/md3-tokens.css */
/* MD3-inspired tokens tuned for education: high readability, clear contrast, calm surfaces */
:root{
/* Typography */
--font-sans: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
--font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
/* Spacing + shape */
--radius-1: 10px;
--radius-2: 16px;
--radius-3: 22px;
--shadow-1: 0 1px 2px rgba(0,0,0,.08), 0 2px 8px rgba(0,0,0,.06);
/* Color roles (keep simple) */
--md-surface: #ffffff;
--md-surface-2: #f6f7fb;
--md-on-surface: #111318;
--md-primary: #2f6fed; /* calm blue */
--md-on-primary: #ffffff;
--md-secondary: #5a5f72; /* muted */
--md-on-secondary: #ffffff;
--md-tertiary: #0f766e; /* teal for "practical" tools */
--md-on-tertiary: #ffffff;
--md-outline: #d7dbe7;
--md-success: #1a7f37;
--md-warning: #b54708;
--md-danger: #b42318;
/* Focus ring for accessibility */
--md-focus: 0 0 0 3px rgba(47,111,237,.28);
}
@media (prefers-color-scheme: dark){
:root{
--md-surface: #0b0e14;
--md-surface-2: #121725;
--md-on-surface: #e8eaf2;
--md-primary: #9bb6ff;
--md-on-primary: #0b0e14;
--md-secondary: #b8bccd;
--md-on-secondary: #0b0e14;
--md-tertiary: #4fd1c5;
--md-on-tertiary: #0b0e14;
--md-outline: #2b3244;
--md-focus: 0 0 0 3px rgba(155,182,255,.25);
}
}

75
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:root{
--bg: #1f2027;
--panel: rgba(255,255,255,.04);
--panel-border: rgba(255,255,255,.10);
--text: #e8e8ee;
--muted: #a9acb8;
--accent: #33ff7a;
--accent-dim: rgba(51,255,122,.15);
--line: rgba(255,255,255,.12);
}
*{ box-sizing: border-box; }
body{
margin:0;
font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
background: var(--bg);
color: var(--text);
}
.site-header{
border-bottom: 1px solid rgba(255,255,255,.08);
background: rgba(0,0,0,.12);
}
.site-header__inner{
max-width: 1200px;
margin: 0 auto;
padding: 14px 20px;
display:flex;
align-items:center;
justify-content:space-between;
gap: 18px;
}
.brand{
font-weight: 800;
letter-spacing: .02em;
}
.nav{
display:flex;
gap: 14px;
flex-wrap: wrap;
justify-content:flex-end;
}
.nav__link{
color: var(--muted);
text-decoration:none;
font-weight: 700;
font-size: 13px;
}
.nav__link:hover{ color: var(--text); }
.site-main{
max-width: 1200px;
margin: 0 auto;
padding: 28px 20px 40px;
min-height: calc(100vh - 140px);
}
.site-footer{
border-top: 1px solid rgba(255,255,255,.08);
background: rgba(0,0,0,.10);
}
.site-footer__inner{
max-width: 1200px;
margin: 0 auto;
padding: 16px 20px;
color: var(--muted);
font-size: 12px;
line-height: 1.5;
}