update styles and logo

static/css/main.css

@@ -119,46 +119,14 @@ body {
   );
   padding: 20px 24px;
   display: flex;
-  justify-content: space-between;
+  justify-content: center;
   align-items: center;
   box-shadow: var(--shadow-md);
   z-index: 10;
 }
 
-.header-content {
-  display: flex;
-  align-items: center;
-  gap: 12px;
-}
-
-.logo-icon {
-  width: 40px;
-  height: 40px;
-  background: rgba(255, 255, 255, 0.2);
-  border-radius: var(--border-radius-md);
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  color: white;
-  animation: pulse 2s infinite;
-}
-
-@keyframes pulse {
-  0%,
-  100% {
-    transform: scale(1);
-  }
-
-  50% {
-    transform: scale(1.05);
-  }
-}
-
-.header-title {
-  font-size: 1.5rem;
-  font-weight: 700;
-  color: white;
-  letter-spacing: -0.5px;
+.header-content img {
+  width: 200px;
 }
 
 /* ===== Main Content ===== */
@@ -399,31 +367,6 @@ body {
     padding: 16px 20px;
   }
 
-  .header-title {
-    font-size: 1.25rem;
-  }
-
-  .welcome-section {
-    padding: 30px 16px;
-  }
-
-  .welcome-icon {
-    width: 64px;
-    height: 64px;
-  }
-
-  .welcome-title {
-    font-size: 1.5rem;
-  }
-
-  .welcome-subtitle {
-    font-size: 1rem;
-  }
-
-  .sample-question {
-    padding: 16px 20px;
-  }
-
   .chat-main {
     padding: 0;
   }
@@ -458,14 +401,6 @@ body {
   .message {
     max-width: 90%;
   }
-
-  .sample-question {
-    padding: 14px 16px;
-  }
-
-  .sample-text {
-    font-size: 0.9rem;
-  }
 }
 
 /* ===== Loading Animation ===== */