Improve mobile UI (resizing)

src/App.css

@@ -1,9 +1,11 @@
 /* App.css */
 .app-container {
-  display: flex;
+  display: block;
-  flex-direction: column;
+  /* Changed from flex to allow natural document flow */
   min-height: 100vh;
   background-color: var(--color-bg);
+  overflow-x: hidden;
+  max-width: 100vw;
 }
 
 .app-header {
@@ -38,13 +40,16 @@
 }
 
 .main-stage {
-  flex: 1;
+  /* Natural height - not flex to prevent shrinking when footer is present */
   display: flex;
   flex-direction: column;
   align-items: center;
-  justify-content: center;
+  justify-content: flex-start;
   padding: var(--spacing-md);
   gap: var(--spacing-xl);
+  overflow-x: hidden;
+  max-width: 100%;
+  box-sizing: border-box;
 }
 
 .card {
@@ -58,6 +63,8 @@
   width: 100%;
   max-width: 600px;
   transition: max-width 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), transform 0.2s ease;
+  box-sizing: border-box;
+  overflow-x: hidden;
 }
 
 .card.has-hint {
@@ -357,7 +364,8 @@ button {
   background-color: transparent;
   border: 2px solid var(--color-primary);
   color: var(--color-primary);
-  padding: 0.5rem 1rem;
+  padding: 0.4rem 0.8rem;
+  /* Compact padding by default */
   border-radius: 30px;
   font-weight: 600;
   cursor: pointer;
@@ -365,7 +373,8 @@ button {
   align-items: center;
   gap: 8px;
   transition: all 0.2s;
-  font-size: 0.9rem;
+  font-size: 0.8rem;
+  /* Compact font size by default */
 }
 
 .hint-button:hover {
@@ -387,7 +396,8 @@ button {
   background-color: transparent;
   border: 2px solid var(--color-text-muted);
   color: var(--color-text-muted);
-  padding: 0.5rem 1rem;
+  padding: 0.4rem 0.8rem;
+  /* Compact padding by default */
   border-radius: 30px;
   font-weight: 600;
   cursor: pointer;
@@ -395,7 +405,8 @@ button {
   align-items: center;
   gap: 8px;
   transition: all 0.2s;
-  font-size: 0.9rem;
+  font-size: 0.8rem;
+  /* Compact font size by default */
 }
 
 .zen-button:hover {
@@ -608,6 +619,20 @@ button {
   .header-controls {
     gap: 4px;
   }
+
+  /* Fix action row overflow on narrow screens */
+  .action-row {
+    flex-wrap: wrap;
+    gap: 8px !important;
+    padding: 0 8px;
+    max-width: 100%;
+    box-sizing: border-box;
+  }
+
+  /* Reduce card padding on mobile */
+  .card {
+    padding: var(--spacing-md);
+  }
 }
 
 .toggle-option.active {
@@ -653,26 +678,29 @@ button {
 
   .main-stage {
     padding: 0;
+    display: flex;
     flex-direction: column;
     align-items: center;
-    justify-content: center;
+    justify-content: flex-start;
-    /* Center vertically */
     gap: 0;
-    /* Allow scrolling */
+    height: 100vh;
-    height: auto;
+    overflow: hidden;
-    min-height: 100vh;
+    /* Prevent scroll - fit everything on one screen */
-    overflow-y: auto;
-    display: block;
   }
 
   .card.sheet-music-card {
     max-width: 100%;
     width: 100%;
-    min-height: 100vh;
+    height: 100vh;
+    /* Fit within viewport */
+    max-height: 100vh;
     margin: 0;
     border-radius: 0;
     align-items: stretch;
     box-sizing: border-box;
+    overflow: hidden;
+    display: flex;
+    flex-direction: column;
   }
 
   /* Staff Row: Horizontal Layout for Staff + Note Name */
@@ -701,10 +729,11 @@ button {
   .sheet-music-container {
     width: 100%;
     flex: 0 0 auto;
-    min-height: 180px;
+    min-height: 120px;
-    /* Increased from 150px */
+    /* Reduced to allow more space for fretboard */
-    transform: scale(1.1);
+    max-height: 180px;
-    /* Scale UP */
+    transform: scale(1.0);
+    /* No scaling to prevent overflow */
     transform-origin: center center;
     justify-content: center;
     margin-bottom: 0;
@@ -747,14 +776,17 @@ button {
     transform: none;
     max-width: none;
     width: 100%;
-    flex-grow: 1;
+    flex: 1;
+    /* Take remaining space */
     display: flex;
     align-items: center;
     justify-content: center;
     background: #2a2a2a;
-    /* distinct bg for full width feel */
+    min-height: 100px;
-    min-height: 200px;
+    /* Reduced to fit on screen */
-    padding: 10px 0;
+    max-height: 50vh;
+    /* Limit height */
+    padding: 5px 0;
   }
 
   /* Hide Instruction Text ("Play note above") */
@@ -784,32 +816,33 @@ button {
     text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
   }
 
-  /* Push settings way down so they don't interfere with main view */
+  /* Hide settings footer in landscape - accessible via settings modal */
   .settings-footer {
-    margin-top: 50px;
+    display: none;
-    padding-bottom: 50px;
   }
 
-  /* Make main stage scrollable to reach settings */
+  /* App container in landscape */
   .app-container {
-    overflow-y: auto;
+    overflow: hidden;
     height: 100vh;
-    display: block;
-    /* Break flex height lock */
   }
 
   .action-row {
-    margin-top: 20px !important;
+    margin-top: 5px !important;
     width: 100%;
-    padding: 20px;
+    max-width: 100vw;
+    padding: 5px;
     position: static;
-    /* Flow naturally below */
     display: flex;
     flex-direction: row;
+    flex-wrap: wrap;
     justify-content: center;
-    gap: 16px;
+    gap: 8px;
     background: var(--color-bg);
     pointer-events: auto;
+    box-sizing: border-box;
+    flex-shrink: 0;
+    /* Don't shrink */
   }
 
   .action-row button {

src/App.tsx

@@ -75,6 +75,15 @@ function App() {
   const [hoveredMidi, setHoveredMidi] = useState<number | null>(null);
   const feedbackTimeoutRef = useRef<ReturnType<typeof setTimeout> | null>(null);
   const [isFullscreen, setIsFullscreen] = useState(false);
+  const [windowWidth, setWindowWidth] = useState(window.innerWidth);
+
+  useEffect(() => {
+    const handleResize = () => {
+      setWindowWidth(window.innerWidth);
+    };
+    window.addEventListener('resize', handleResize);
+    return () => window.removeEventListener('resize', handleResize);
+  }, []);
 
   useEffect(() => {
     const handleFullscreenChange = () => {
@@ -485,7 +494,7 @@ function App() {
               keySignature={settings.keySignature}
               clef={activeClef}
               transpose={activeTranspose}
-              width={Math.min(window.innerWidth - 40, 500)}
+              width={Math.min(windowWidth - 40, 500)}
               height={activeClef === 'grand' ? 260 : 180}
               hideTargetNote={settings.gameMode === 'ear_training' && !revealed}
               hoverMidi={settings.showHint ? hoveredMidi : null}
@@ -708,6 +717,7 @@ function App() {
         audioLevel={audioLevel}
         debugInfo={debugInfo}
         isListening={isListening}
+        onMicToggle={() => setListening(l => !l)}
       />
 
       <OpenSourceModal

src/components/SettingsModal.tsx

@@ -1,5 +1,5 @@
 import React, { useState } from 'react';
-import { X, Volume2, VolumeX, ChevronDown, ChevronUp } from 'lucide-react';
+import { X, Volume2, VolumeX, ChevronDown, ChevronUp, Mic, MicOff } from 'lucide-react';
 import type { AppSettings } from './Controls';
 import type { MicrophoneDebugInfo } from '../hooks/usePitchDetector';
 
@@ -11,6 +11,7 @@ interface SettingsModalProps {
     audioLevel?: number;
     debugInfo?: MicrophoneDebugInfo | null;
     isListening?: boolean;
+    onMicToggle?: () => void;
 }
 
 // Level meter component
@@ -58,7 +59,8 @@ export const SettingsModal: React.FC<SettingsModalProps> = ({
     onUpdateSettings,
     audioLevel = 0,
     debugInfo,
-    isListening = false
+    isListening = false,
+    onMicToggle
 }) => {
     const [showDebugInfo, setShowDebugInfo] = useState(false);
 
@@ -166,6 +168,26 @@ export const SettingsModal: React.FC<SettingsModalProps> = ({
 
                 <hr style={{ borderColor: 'rgba(255,255,255,0.1)', margin: '24px 0' }} />
 
+                {/* Microphone Toggle */}
+                <div className="control-group" style={{ marginBottom: '16px' }}>
+                    <div style={{ display: 'flex', alignItems: 'center', justifyContent: 'space-between', marginBottom: '8px' }}>
+                        <label className="control-label" style={{ marginBottom: 0, fontSize: '16px', display: 'flex', alignItems: 'center', gap: '8px' }}>
+                            {isListening ? <Mic size={18} /> : <MicOff size={18} />}
+                            <span>Microphone</span>
+                        </label>
+                        <button
+                            className={`switch-button ${isListening ? 'active' : ''}`}
+                            onClick={onMicToggle}
+                            title={isListening ? "Turn Off Microphone" : "Turn On Microphone"}
+                        >
+                            <div className="switch-thumb" />
+                        </button>
+                    </div>
+                    <p style={{ fontSize: '12px', opacity: 0.7, margin: 0 }}>
+                        {isListening ? 'Microphone is active and listening for notes.' : 'Enable microphone to detect your playing.'}
+                    </p>
+                </div>
+
                 {/* Mic Sensitivity */}
                 <div className="control-group">
                     <label className="control-label" style={{ marginBottom: '12px', fontSize: '16px' }}>