Add mobile on-screen keyboard for touch devices with visual feedback

css/style.css

@@ -104,3 +104,157 @@ html, body {
   font-size: 12px;
   letter-spacing: 0.02em;
 }
+
+/* Mobile on-screen keyboard */
+.mobile-keyboard {
+  position: fixed;
+  bottom: 0;
+  left: 0;
+  right: 0;
+  background: linear-gradient(180deg, rgba(10, 13, 18, 0.98) 0%, rgba(7, 8, 11, 0.98) 100%);
+  backdrop-filter: blur(12px);
+  border-top: 1px solid rgba(255, 255, 255, 0.1);
+  padding: 12px 8px 12px 8px;
+  display: none;
+  flex-direction: column;
+  gap: 8px;
+  z-index: 1000;
+  box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.7);
+}
+
+.mobile-keyboard.active {
+  display: flex;
+}
+
+.keyboard-row {
+  display: flex;
+  gap: 6px;
+  justify-content: center;
+}
+
+.keyboard-key {
+  flex: 1;
+  max-width: 46px;
+  height: 44px;
+  background: linear-gradient(180deg, #1a2233 0%, #0f1621 100%);
+  border: 1px solid rgba(255, 255, 255, 0.12);
+  border-radius: 6px;
+  color: #d7e7ff;
+  font-family: ui-monospace, SFMono-Regular, monospace;
+  font-size: 16px;
+  font-weight: 600;
+  cursor: pointer;
+  user-select: none;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  touch-action: manipulation;
+  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
+}
+
+.keyboard-key:active {
+  background: linear-gradient(180deg, #0f1621 0%, #1a2233 100%);
+  transform: translateY(1px);
+  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
+}
+
+.keyboard-key.wide {
+  flex: 2;
+  max-width: none;
+}
+
+.keyboard-key.space {
+  flex: 4;
+  max-width: none;
+}
+
+.keyboard-key.enter {
+  background: linear-gradient(180deg, #0a84ff 0%, #0766cc 100%);
+  border-color: rgba(10, 132, 255, 0.4);
+}
+
+.keyboard-key.enter:active {
+  background: linear-gradient(180deg, #0766cc 0%, #0a84ff 100%);
+}
+
+.keyboard-key.backspace {
+  background: linear-gradient(180deg, #cc3333 0%, #992222 100%);
+  border-color: rgba(204, 51, 51, 0.4);
+}
+
+.keyboard-key.backspace:active {
+  background: linear-gradient(180deg, #992222 0%, #cc3333 100%);
+}
+
+/* Mobile-specific adjustments */
+@media (max-width: 768px) {
+  .wrap {
+    padding: 12px;
+    padding-bottom: 0;
+  }
+
+  .crt-shell {
+    width: 100%;
+    max-width: 100%;
+    aspect-ratio: 4 / 3;
+    border-radius: 12px;
+    padding: 8px;
+    box-shadow:
+      0 8px 24px rgba(0, 0, 0, 0.6),
+      0 0 0 1px rgba(255, 255, 255, 0.06) inset;
+  }
+
+  .crt-overlay {
+    inset: 8px;
+    border-radius: 8px;
+  }
+
+  #crt {
+    border-radius: 8px;
+  }
+
+  .hint {
+    margin-top: 8px;
+    font-size: 10px;
+  }
+}
+
+@media (max-width: 480px) {
+  .wrap {
+    padding: 8px;
+    padding-bottom: 0;
+  }
+
+  .crt-shell {
+    border-radius: 8px;
+    padding: 6px;
+  }
+
+  .crt-overlay {
+    inset: 6px;
+    border-radius: 6px;
+  }
+
+  #crt {
+    border-radius: 6px;
+  }
+
+  .keyboard-key {
+    max-width: 38px;
+    height: 38px;
+    font-size: 14px;
+  }
+}
+
+/* Landscape mobile adjustments */
+@media (max-width: 900px) and (max-height: 500px) {
+  .wrap {
+    padding: 8px;
+  }
+
+  .crt-shell {
+    width: auto;
+    height: calc(100vh - 16px);
+    aspect-ratio: 4 / 3;
+  }
+}

index.html

@@ -24,6 +24,59 @@
     </footer>
   </main>
 
+  <!-- Mobile on-screen keyboard (only shown on touch devices) -->
+  <div id="mobile-keyboard" class="mobile-keyboard">
+    <div class="keyboard-row">
+      <button class="keyboard-key" data-key="1">1</button>
+      <button class="keyboard-key" data-key="2">2</button>
+      <button class="keyboard-key" data-key="3">3</button>
+      <button class="keyboard-key" data-key="4">4</button>
+      <button class="keyboard-key" data-key="5">5</button>
+      <button class="keyboard-key" data-key="6">6</button>
+      <button class="keyboard-key" data-key="7">7</button>
+      <button class="keyboard-key" data-key="8">8</button>
+      <button class="keyboard-key" data-key="9">9</button>
+      <button class="keyboard-key" data-key="0">0</button>
+    </div>
+    <div class="keyboard-row">
+      <button class="keyboard-key" data-key="q">Q</button>
+      <button class="keyboard-key" data-key="w">W</button>
+      <button class="keyboard-key" data-key="e">E</button>
+      <button class="keyboard-key" data-key="r">R</button>
+      <button class="keyboard-key" data-key="t">T</button>
+      <button class="keyboard-key" data-key="y">Y</button>
+      <button class="keyboard-key" data-key="u">U</button>
+      <button class="keyboard-key" data-key="i">I</button>
+      <button class="keyboard-key" data-key="o">O</button>
+      <button class="keyboard-key" data-key="p">P</button>
+    </div>
+    <div class="keyboard-row">
+      <button class="keyboard-key" data-key="a">A</button>
+      <button class="keyboard-key" data-key="s">S</button>
+      <button class="keyboard-key" data-key="d">D</button>
+      <button class="keyboard-key" data-key="f">F</button>
+      <button class="keyboard-key" data-key="g">G</button>
+      <button class="keyboard-key" data-key="h">H</button>
+      <button class="keyboard-key" data-key="j">J</button>
+      <button class="keyboard-key" data-key="k">K</button>
+      <button class="keyboard-key" data-key="l">L</button>
+    </div>
+    <div class="keyboard-row">
+      <button class="keyboard-key" data-key="z">Z</button>
+      <button class="keyboard-key" data-key="x">X</button>
+      <button class="keyboard-key" data-key="c">C</button>
+      <button class="keyboard-key" data-key="v">V</button>
+      <button class="keyboard-key" data-key="b">B</button>
+      <button class="keyboard-key" data-key="n">N</button>
+      <button class="keyboard-key" data-key="m">M</button>
+      <button class="keyboard-key backspace wide" data-key="backspace">←</button>
+    </div>
+    <div class="keyboard-row">
+      <button class="keyboard-key space" data-key=" ">SPACE</button>
+      <button class="keyboard-key enter wide" data-key="enter">ENTER</button>
+    </div>
+  </div>
+
   <script type="module" src="./js/main.js"></script>
 </body>
 </html>

js/main.js

@@ -7,17 +7,80 @@ if (!canvas) { // Fail clearly if the element is missing
   throw new Error('Canvas element with id "crt" was not found.'); // Throw a helpful error
 } // End guard
 
+// Detect if we're on a touch device
+const isTouchDevice = ('ontouchstart' in window) || (navigator.maxTouchPoints > 0);
+
+// Mobile keyboard handling
+const mobileKeyboard = document.getElementById("mobile-keyboard");
+let keyboardVisible = false;
+
+function showMobileKeyboard() {
+  if (isTouchDevice && mobileKeyboard) {
+    mobileKeyboard.classList.add("active");
+    keyboardVisible = true;
+  }
+}
+
+function hideMobileKeyboard() {
+  if (isTouchDevice && mobileKeyboard) {
+    mobileKeyboard.classList.remove("active");
+    keyboardVisible = false;
+  }
+}
+
+// Hook into terminal's input mode
+const originalSetInputMode = TeletextTerminal.prototype.setInputMode;
+TeletextTerminal.prototype.setInputMode = function(on) {
+  originalSetInputMode.call(this, on);
+  if (on) {
+    showMobileKeyboard();
+  } else {
+    hideMobileKeyboard();
+  }
+};
+
 const term = new TeletextTerminal(canvas, { // Create a terminal instance
   cols: 40, // Teletext columns
   rows: 25, // Teletext rows
   scale: 3 // Upscaling factor (keeps the chunky look)
 }); // End terminal creation
 
+// Wire up mobile keyboard buttons
+if (isTouchDevice && mobileKeyboard) {
+  mobileKeyboard.addEventListener("click", (e) => {
+    const key = e.target.closest(".keyboard-key");
+    if (!key) return;
+
+    const keyValue = key.dataset.key;
+    if (!keyValue) return;
+
+    // Simulate keyboard events
+    if (keyValue === "enter") {
+      term._pushKey({ type: "enter" });
+    } else if (keyValue === "backspace") {
+      term._pushKey({ type: "backspace" });
+    } else {
+      term._pushKey({ type: "char", ch: keyValue });
+    }
+
+    // Visual feedback
+    key.style.transform = "scale(0.95)";
+    setTimeout(() => {
+      key.style.transform = "";
+    }, 100);
+  });
+}
+
 term.start(); // Start the render loop
 
-// Make it easy to “wake” key handling on click (handy on Safari). // Note
+// Make it easy to "wake" key handling on click (handy on Safari). // Note
 canvas.addEventListener("pointerdown", () => { // On click/tap
   canvas.focus(); // Focus the canvas (helps some browsers deliver key events)
+  
+  // On mobile, tapping the canvas acts like pressing Enter to advance
+  if (isTouchDevice && !keyboardVisible) {
+    term._pushKey({ type: "enter" });
+  }
 }); // End listener
 
 // Run the story with top-level error handling. // Note