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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>OpenSignal</title>
<link rel="shortcut icon" href="./src/icons/128x128.png" type="image/x-icon">
<style>
noscript {
width: 100%;
min-height: 100vh;
display: flex;
justify-content: center;
align-items: center;
position: fixed;
top: 0;
left: 0;
background-color: #fff;
z-index: 999;
text-align: center;
}
</style>
<link rel="stylesheet" href="./src/styles/styles.css" />
<link rel="stylesheet" href="./src/styles/hover.css" />
<link rel="stylesheet" href="./src/styles/details.css">
<link rel="stylesheet" href="./src/styles/layout.css">
<link rel="stylesheet" href="./src/styles/components.css">
<script type="module" src="./src/main.ts" defer></script>
</head>
<body>
<noscript>
This application requires JavaScript to run. <br>
Enable JavaScript to continue.
</noscript>
<!-- Loading Screen -->
<div class="loading-screen" role="status" aria-label="Loading OpenSignal, please wait">
<div class="logo-container">
<img src="./src/icons/256x256.png" alt="OpenSignal logo">
<h1>OpenSignal</h1>
</div>
<div class="progress-bar" role="progressbar" aria-valuemin="0" aria-valuemax="100" aria-valuenow="10"
aria-label="Loading progress">
<div class="progress"></div>
</div>
</div>
<!-- Main Application -->
<main aria-label="Circuit Simulator Workspace">
<!-- Menu Bar -->
<div class="menu-bar" role="toolbar" aria-label="File actions">
<button title="Open (Ctrl+O)" class="open" aria-keyshortcuts="Control+O">Open</button>
<button title="Save (Ctrl+S)" class="save" aria-keyshortcuts="Control+S">Save</button>
<!-- <button title="Help (Ctrl+H)" class="help" aria-keyshortcuts="Control+H">Help</button> -->
</div>
<!-- Canvas Area -->
<canvas class="workspace" role="application"
aria-label="Circuit drawing canvas. Use arrow keys to navigate, Delete to remove a selected component."
tabindex="0"></canvas>
<!-- Left Toolbar -->
<aside class="tools-left" aria-label="Editor tools">
<!-- Mode Selection -->
<div class="mode" role="group" aria-label="Editor mode">
<button class="edit icon-button selected" aria-pressed="true" title="Edit Mode (E)" aria-keyshortcuts="E">
<img src="./src/assets/wire.svg" alt="" aria-hidden="true">
<span class="sr-only">Edit mode</span>
</button>
<button class="simulate icon-button" aria-pressed="false" title="Simulate (S)" aria-keyshortcuts="S">
<img src="./src/assets/simulate.svg" alt="" aria-hidden="true">
<span class="sr-only">Simulate mode</span>
</button>
</div>
<!-- Undo / Redo -->
<div class="undo-redo" role="group" aria-label="History controls">
<button class="undo icon-button" disabled aria-label="Undo (Ctrl+Z)" aria-keyshortcuts="Control+Z">
<img src="./src/assets/undo.svg" alt="" aria-hidden="true">
</button>
<button class="redo icon-button" disabled aria-label="Redo (Ctrl+Y)" aria-keyshortcuts="Control+Y">
<img src="./src/assets/undo.svg" alt="" aria-hidden="true">
</button>
</div>
</aside>
<!-- Device Bar -->
<nav class="device-bar" aria-label="Circuit components"></nav>
<!-- Right Toolbar -->
<aside class="tools-right" aria-label="View controls">
<!-- General settings -->
<div class="general-settings" role="group" aria-label="Canvas settings">
<!-- Snap to Grid -->
<button class="snap-to-grid icon-button selected" aria-pressed="true" aria-label="Snap to grid on (Shift+G)"
aria-keyshortcuts="Shift+G">
<img src="./src/assets/snap.svg" alt="" aria-hidden="true">
</button>
<!-- Show label -->
<button class="show-label icon-button selected" aria-pressed="true" aria-label="Show labels on (Shift+L)"
aria-keyshortcuts="Shift+L">
<img src="./src/assets/label.svg" alt="" aria-hidden="true">
</button>
</div>
<!-- Zoom Controls -->
<div class="zoom-in-out" role="group" aria-label="Zoom controls">
<output class="zoom-percentage" id="zoom-percentage" aria-label="Current zoom level"
aria-live="polite">100%</output>
<button class="zoom-in icon-button" aria-label="Zoom in (Shift++)" aria-keyshortcuts="Shift+Equal">
<img src="./src/assets/zoom-in.svg" alt="" aria-hidden="true">
</button>
<button class="zoom-out icon-button" aria-label="Zoom out (Shift+-)" aria-keyshortcuts="Shift+Minus">
<img src="./src/assets/zoom-out.svg" alt="" aria-hidden="true">
</button>
</div>
</aside>
</main>
<!-- Dialog Overlay -->
<div class="overlay hidden" id="dialog-overlay" aria-hidden="true"></div>
<!-- Transparent Overlay -->
<div class="transparent-overlay hidden" aria-hidden="true"></div>
<!-- Devices Dialog -->
<div class="dialog extra-devices-dialog hidden" id="devices-dialog" role="dialog" aria-modal="true"
aria-labelledby="devices-dialog-title" inert="true">
<h2 id="devices-dialog-title">Devices</h2>
<div class="extra-devices" role="list"></div>
</div>
<!-- Save Filename Dialog -->
<div class="dialog save-dialog hidden" id="save-dialog" role="dialog" aria-modal="true"
aria-labelledby="save-dialog-title" aria-describedby="save-dialog-desc" inert>
<div class="save-dialog-header">
<h2 id="save-dialog-title">Save circuit</h2>
<button class="save-dialog-close icon-button" aria-label="Close save dialog">
<img src="./src/assets/close.svg" alt="" aria-hidden="true">
</button>
</div>
<p id="save-dialog-desc">
Enter a name for your circuit file. It will be saved as a <code>.json</code> file.
</p>
<div class="save-dialog-field">
<!-- <label for="save-filename-input">File name</label> -->
<div class="save-filename-input-wrapper">
<input id="save-filename-input" type="text" class="save-filename-input" value="my-circuit" aria-required="true"
autocomplete="off" spellcheck="false" aria-describedby="save-filename-error">
<span class="save-filename-ext" aria-hidden="true">.json</span>
</div>
<p id="save-filename-error" class="save-filename-error hidden" role="alert" aria-live="assertive">
File name cannot be empty.
</p>
</div>
<div class="save-dialog-actions">
<button class="save-dialog-cancel">Cancel</button>
<button class="save-dialog-confirm">Save</button>
</div>
</div>
<!-- Context Menu -->
<div class="context hidden" id="context-menu" role="menu" aria-label="Component options" aria-hidden="true" inert>
<button class="delete-device context-element" role="menuitem">Delete</button>
</div>
<div class="copyright" aria-hidden="true">
© 2026 asifali411. All rights reserved.
</div>
<!-- Toast notification -->
<div class="toast hidden" id="toast" role="status" aria-live="polite" aria-atomic="true" inert>
<p class="toast-message">Saved successfully!</p>
</div>
<!-- Debug Info (hidden from assistive tech, visual only) -->
<div class="info-bar" aria-hidden="true">
FPS: <span class="fps">12</span>
</div>
<!-- Screen reader live announcer for dynamic status messages -->
<div id="sr-announcer" role="status" aria-live="polite" aria-atomic="true" class="sr-only"></div>
</body>
</html>