diff --git a/style.css b/style.css
index 829c94c..28668bc 100644
--- a/style.css
+++ b/style.css
@@ -21,72 +21,57 @@ section, div, footer {
     border: 1px solid black;
     border-radius: 6px;
 }
-
 .grid td, tr {
     padding: 0;
 }
-
 .grid tr:first-child td:first-child {
     border-top-left-radius: 5px;
 }
-
 .grid tr:first-child td:first-child input {
     border-top-left-radius: 4px;
 }
-
 .grid tr:first-child td:last-child {
     border-top-right-radius: 5px;
 }
-
 .grid tr:first-child td:last-child input {
     border-top-right-radius: 4px;
 }
-
 .grid tr:last-child td:first-child {
     border-bottom-left-radius: 5px;
 }
-
 .grid tr:last-child td:first-child > input {
     border-bottom-left-radius: 4px;
 }
-
 .grid tr:last-child td:last-child {
     border-bottom-right-radius: 5px;
 }
-
 .grid tr:last-child td:last-child input {
     border-bottom-right-radius: 4px;
 }
-
 .grid tr:nth-child(3n+1) td {
     border-top: 1px solid black;
 }
-
 .grid tr:nth-child(3n+2) td {
     border-top: 1px solid grey;
     border-bottom: 1px solid grey;
 }
-
 .grid tr:nth-child(3n) td {
     border-bottom: 1px solid black;
 }
-
 .grid td:nth-child(3n+1) {
     border-left: 1px solid black;
 }
-
 .grid td:nth-child(3n+2) {
     border-left: 1px solid grey;
     border-right: 1px solid grey;
 }
-
 .grid td:nth-child(3n+3) {
     border-right: 1px solid black;
 }
 
 input[type=number] {
-    width: 1.6em;
-    height: 1.6em;
+    width: 1.5em;
+    height: 1.5em;
     font-size: 1.5em;
     border: 0;
     padding: 0;
@@ -94,58 +79,61 @@ input[type=number] {
     transition: background 0.5s;
     -moz-appearance: textfield;
 }
-
 input::-webkit-outer-spin-button,
 input::-webkit-inner-spin-button {
-  -webkit-appearance: none;
-  margin: 0;
+    -webkit-appearance: none;
+    margin: 0;
+}
+input::-webkit-calendar-picker-indicator {
+    display: none;
 }
-
 input[type=number]:enabled {
     color: darkblue;
     background: white;
 }
-
 input[type=number]:disabled, button:enabled {
     color: white;
     background: #6666ff;
 }
-
 input[type=number].same-value:enabled {
     color: #009973 !important;
     background: #66ffd9 !important;
 }
-
 input[type=number].forbidden-value:enabled {
     background: #b3ffda !important;
 }
-
 input[type=number].same-value, button.same-value:enabled {
     color: white !important;
     background: #00e6ac !important;
 }
-
 input[type=number].forbidden-value:disabled {
     background: #6288ea !important;
 }
-
 input::placeholder {
     color: #888;
 }
 
 .buttons {
     flex-wrap: wrap;
+    align-items: center;
     column-gap: 0.2em;
 }
-
 button, input[type="color"] {
     border: 2px outset #6666ff;
     border-radius: 4px;
-    padding-bottom: 2px;
+    padding: 0 8px 2px 8px;
+    margin: 0 0 1px 0;
+    
 }
-
 button.same-value:enabled {
     border: 2px inset #00e6ac;
+    padding: 2px 7px 0 9px;
+    margin: 1px 0 0 0;
+}
+button:disabled {
+    color: lightgrey;
+    background: darkgrey;
+    border: 2px outset darkgrey;
 }
 
 input[type="color"] {
@@ -156,11 +144,9 @@ input[type="color"] {
 .shortcuts caption {
     text-decoration: underline;
 }
-
 .shortcuts td {
     text-align: left;
 }
-
 kbd {
     /* from https://developer.mozilla.org */
     background-color: #eee;
diff --git a/sudoku.js b/sudoku.js
index dd93aba..7fac1a4 100644
--- a/sudoku.js
+++ b/sudoku.js
@@ -14,7 +14,7 @@ window.onload = function() {
         let columnId = 0
         for (box of row.getElementsByTagName('input')) {
             let regionId = rowId - rowId%3 + Math.floor(columnId/3)
-            if (!box.readOnly) {
+            if (!box.disabled) {
                 box.onfocus = onfocus
                 box.oninput = oninput
             }
@@ -35,14 +35,9 @@ window.onload = function() {
         box.neighbourhood = Array.from(box.neighbourhood)
     })
     boxes.forEach(searchCandidatesOf)
-    enableButtons()
     boxes.forEach(showCandidatesOn)
-    for(box of boxes) {
-        if (!box.readOnly) {
-            box.focus()
-            break
-        }
-    }
+    enableButtons()
+    highlightAndTab()
     suggestionTimer = setTimeout(showSuggestion, 30000)
 }
 
@@ -78,6 +73,15 @@ function oninput() {
     refresh(this)
 }
 
+function undo() {
+	if (history.length) {
+		previousState = history.pop()
+		previousState.input.value = previousState.value
+    	refresh(previousState.input)
+    	if (history.length < 1) undoButton.disabled = true
+    }
+}
+
 function refresh(box) {
     box.style.color = colorPicker.value
 
@@ -87,6 +91,9 @@ function refresh(box) {
         neighbour.setCustomValidity("")
     })
     
+    enableButtons()
+    highlightAndTab()
+    
     for (neighbour1 of box.neighbourhood) {
         neighbour1.setCustomValidity("")
         if (neighbour1.value.length) {
@@ -104,15 +111,9 @@ function refresh(box) {
                         }
             } 
         } else if (neighbour1.candidates.size == 0) {
-            console.log("rezgzgzg")
             neighbour1.setCustomValidity("Aucun value possible !")
-            neighbour1.placeholder = "!"
         }
     }
-    
-    enableButtons()
-    highlightAndTab()
-
             
     if (box.form.checkValidity()) { // Correct grid
         if (boxes.filter(box => box.value == "").length == 0) {
@@ -127,15 +128,6 @@ function refresh(box) {
     }
 }
 
-function undo() {
-	if (history.length) {
-		previousState = history.pop()
-		previousState.input.value = previousState.value
-    	refresh(previousState.input)
-    	if (history.length < 1) undoButton.disabled = true
-    }
-}
-
 function enableButtons() {
     for (button of buttons.getElementsByTagName("button")) {
         if (boxes.filter(box => box.value == "").some(box => box.candidates.has(button.textContent))) {
@@ -147,15 +139,6 @@ function enableButtons() {
     }
 }
 
-function moveOn(area, position, direction) {
-    if (area.filter(box => box.disabled).length < 9) {
-        do {
-            position = (position + direction) % 9
-        } while (area[position].disabled)
-        area[position].focus()
-    }
-}
-
 function highlight(value) {
     if (value == highlightedValue) {
         highlightedValue = ""
@@ -186,7 +169,10 @@ function highlightAndTab() {
             }
         })
     } else {
-        boxes.forEach(box => box.className = "")
+        boxes.forEach(box => {
+            box.className = ""
+            box.tabIndex = 0
+        })
     }
 }