Improve mobile responsiveness and accessibility

Enhanced CSS for better mobile experience: added media queries for various screen sizes, improved touch targets, font sizes, and QR code scaling. Updated index.html with mobile meta tags and icons. Added accessibility features for reduced motion.

QRPay/wwwroot/css/app.css

@@ -6,12 +6,25 @@ html, body {
     box-sizing: border-box;
     background: linear-gradient(135deg, #2d5a27 0%, #4a7c59 100%);
     min-height: 100vh;
+    /* Improve mobile performance */
+    -webkit-font-smoothing: antialiased;
+    -moz-osx-font-smoothing: grayscale;
+    /* Prevent horizontal scrolling */
+    overflow-x: hidden;
+    /* Better text rendering on mobile */
+    text-size-adjust: 100%;
+    -webkit-text-size-adjust: 100%;
 }
 
 *, *::before, *::after {
     box-sizing: inherit;
 }
 
+/* Prevent zoom on input focus for iOS */
+input, select, textarea {
+    font-size: 16px;
+}
+
 h1:focus {
     outline: none;
 }
@@ -84,6 +97,11 @@ a:hover, .btn-link:hover {
     font-size: 1.2rem;
     opacity: 0.8;
     transition: opacity 0.2s;
+    min-width: 24px;
+    min-height: 24px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
 }
 
 #blazor-error-ui .dismiss:hover {
@@ -91,7 +109,7 @@ a:hover, .btn-link:hover {
 }
 
 .blazor-error-boundary {
-    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, linear-gradient(135deg, #dc2626, #ef4444);
+    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, linear-gradient(135deg, #dc2626, #ef4444);
     padding: 1rem 1rem 1rem 3.7rem;
     color: white;
     border-radius: 12px;
@@ -175,4 +193,96 @@ code {
 
 ::-webkit-scrollbar-thumb:hover {
     background: rgba(255, 255, 255, 0.5);
+}
+
+/* Mobile-specific improvements */
+@media (max-width: 768px) {
+    /* Improve tap highlighting */
+    * {
+        -webkit-tap-highlight-color: rgba(74, 124, 89, 0.2);
+    }
+    
+    /* Better button touch targets */
+    button, .btn, input[type="button"], input[type="submit"] {
+        min-height: 44px;
+        min-width: 44px;
+    }
+    
+    /* Improve form control touch targets */
+    input, textarea, select {
+        min-height: 44px;
+    }
+    
+    /* Disable iOS zoom on inputs */
+    input, textarea, select {
+        font-size: 16px !important;
+    }
+    
+    /* Loading progress adjustments for mobile */
+    .loading-progress {
+        width: 6rem;
+        height: 6rem;
+        inset: 35vh 0 auto 0;
+    }
+    
+    .loading-progress-text {
+        inset: calc(35vh + 2.5rem) 0 auto 0.2rem;
+        font-size: 1rem;
+    }
+}
+
+/* Very small screens */
+@media (max-width: 480px) {
+    body {
+        font-size: 14px;
+    }
+    
+    .loading-progress {
+        width: 5rem;
+        height: 5rem;
+        inset: 30vh 0 auto 0;
+    }
+    
+    .loading-progress-text {
+        inset: calc(30vh + 2rem) 0 auto 0.2rem;
+        font-size: 0.9rem;
+    }
+    
+    #blazor-error-ui {
+        padding: 0.75rem 1rem;
+        font-size: 0.9rem;
+    }
+}
+
+/* Landscape mobile adjustments */
+@media (max-height: 600px) and (orientation: landscape) {
+    .loading-progress {
+        inset: 20vh 0 auto 0;
+    }
+    
+    .loading-progress-text {
+        inset: calc(20vh + 3.25rem) 0 auto 0.2rem;
+    }
+}
+
+/* High DPI screens */
+@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
+    /* Sharper rendering for high DPI */
+    body {
+        -webkit-font-smoothing: antialiased;
+        -moz-osx-font-smoothing: grayscale;
+    }
+}
+
+/* Accessibility improvements */
+@media (prefers-reduced-motion: reduce) {
+    * {
+        animation-duration: 0.01ms !important;
+        animation-iteration-count: 1 !important;
+        transition-duration: 0.01ms !important;
+    }
+    
+    .loading-progress circle {
+        transition: none !important;
+    }
 }