menu ok graphiquement et page 404 ok

css/style.css

@@ -28,6 +28,8 @@
 
 html {
     scroll-behavior: smooth;
+    min-height: 100%;
+    height: 100%;
 }
 
 body {
@@ -41,6 +43,15 @@ body {
     min-height: 100vh;
 }
 
+body > .main-content {
+    flex: 1 0 auto;
+}
+
+main {
+    flex: 1 0 auto;
+    width: 100%;
+}
+
 .container {
     width: 100%;
     margin: 0 auto;
@@ -147,14 +158,16 @@ body {
 
 .footer {
     position: relative;
-    padding: 2px 20px;
+    padding: 8px 20px;
     text-align: center;
     font-size: 0.85rem;
-    line-height: 1.1;
-    min-height: 28px;
+    line-height: 1.3;
+    min-height: 38px;
     display: flex;
     align-items: center;
     justify-content: center;
+    background: rgba(18, 24, 42, 0.98);
+    border-top: 1px solid rgba(255, 255, 255, 0.06);
 }
 
 .footer-logout {
@@ -184,11 +197,13 @@ body {
    ============================================ */
 
 .main-content {
-    flex: 1;
-    padding: 40px 20px;
+    flex: 1 0 auto;
+    min-height: 0;
+    padding: 40px 20px 20px;
     display: flex;
     justify-content: center;
-    align-items: center;
+    align-items: flex-start;
+    width: 100%;
 }
 
 .login-container {