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style.css

@@ -26,94 +26,103 @@ body {
 .header {
     background: #ffffff;
     color: #1c1e21;
-    padding: 1rem 2rem;
+    padding: 1.25rem 2rem;
     display: flex;
     justify-content: space-between;
     align-items: center;
-    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.1);
+    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
     position: sticky;
     top: 0;
     z-index: 100;
-    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
+    border-bottom: 1px solid #e4e6ea;
 }
 
 .header h1 {
     display: flex;
     align-items: center;
-    gap: 0.5rem;
-    font-size: 1.5rem;
-    font-weight: 400;
+    gap: 0.75rem;
+    font-size: 1.6rem;
+    font-weight: 500;
     color: #1c1e21;
     font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
+    letter-spacing: -0.01em;
 }
 
 .device-selector {
     display: flex;
     align-items: center;
-    gap: 0.5rem;
-    background: #e4e6ea;
-    padding: 0.5rem 0.75rem;
-    border-radius: 20px;
-    border: 1px solid rgba(0, 0, 0, 0.1);
+    gap: 0.75rem;
+    background: #f5f6f5;
+    padding: 0.625rem 1rem;
+    border-radius: 24px;
+    border: 1px solid #e4e6ea;
+    backdrop-filter: blur(10px);
 }
 
 .device-selector label {
-    font-size: 0.9rem;
-    font-weight: 500;
-    color: #65676b;
+    font-size: 0.95rem;
+    font-weight: 600;
+    color: #1c1e21;
     white-space: nowrap;
 }
 
 .device-selector select {
     background: #ffffff;
-    border: 1px solid #ccd0d5;
-    padding: 0.375rem 0.5rem;
-    border-radius: 6px;
-    font-size: 0.9rem;
+    border: 1px solid #dadde1;
+    padding: 0.5rem 0.75rem;
+    border-radius: 8px;
+    font-size: 0.95rem;
     color: #1c1e21;
     cursor: pointer;
-    min-width: 100px;
+    min-width: 120px;
+    font-weight: 500;
 }
 
 .btn-secondary {
     background: #ffffff;
-    border: 1px solid #ccd0d5;
+    border: 1px solid #dadde1;
     color: #1c1e21;
-    padding: 0.5rem 0.75rem;
-    border-radius: 6px;
+    padding: 0.625rem 1rem;
+    border-radius: 8px;
     cursor: pointer;
     display: flex;
     align-items: center;
-    gap: 0.25rem;
-    font-size: 0.85rem;
-    transition: all 0.2s ease;
+    gap: 0.375rem;
+    font-size: 0.95rem;
+    transition: all 0.15s ease;
     font-weight: 500;
     font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
+    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
 }
 
 .btn-secondary:hover {
     background: #f5f6f5;
-    border-color: #adadad;
-    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
+    border-color: #b7bbbf;
+    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
+    transform: translateY(-1px);
 }
 
 .chat-container {
     flex: 1;
     display: flex;
     flex-direction: column;
-    max-width: 800px;
+    max-width: 900px;
     margin: 0 auto;
     width: 100%;
-    padding: 1rem;
+    padding: 1.5rem;
     background: #f0f2f5;
 }
 
 .messages-container {
     flex: 1;
     overflow-y: auto;
-    padding: 1rem 0;
+    padding: 1.5rem 0;
     scroll-behavior: smooth;
-    max-height: calc(100vh - 200px);
+    max-height: calc(100vh - 220px);
+    border-radius: 12px;
+    background: #ffffff;
+    margin-bottom: 1rem;
+    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
 }
 
 .welcome-message {
@@ -121,41 +130,47 @@ body {
 }
 
 .message {
-    margin-bottom: 1.5rem;
-    animation: fadeIn 0.3s ease-out;
+    margin-bottom: 2rem;
+    animation: fadeIn 0.25s ease-out;
     display: flex;
     flex-direction: column;
+    opacity: 0;
+    animation-fill-mode: forwards;
 }
 
 @keyframes fadeIn {
-    from { opacity: 0; transform: translateY(10px); }
-    to { opacity: 1; transform: translateY(0); }
+    from { opacity: 0; transform: translateY(15px) scale(0.98); }
+    to { opacity: 1; transform: translateY(0) scale(1); }
 }
 
 .message-header {
     display: flex;
     align-items: center;
-    gap: 0.5rem;
-    margin-bottom: 0.375rem;
-    font-size: 0.8rem;
+    gap: 0.75rem;
+    margin-bottom: 0.5rem;
+    font-size: 0.85rem;
     color: #65676b;
 }
 
 .message-header i {
     color: #65676b;
-    width: 16px;
+    width: 20px;
     text-align: center;
-    font-size: 0.9rem;
+    font-size: 1rem;
+    border-radius: 50%;
+    padding: 0.25rem;
+    background: rgba(101, 103, 107, 0.1);
 }
 
 .user-message .message-header i {
     color: #0084ff;
+    background: rgba(0, 132, 255, 0.1);
 }
 
 .message-author {
     font-weight: 600;
     color: #1c1e21;
-    font-size: 0.85rem;
+    font-size: 0.9rem;
 }
 
 .user-message .message-author {
@@ -164,43 +179,45 @@ body {
 
 .message-time {
     margin-left: auto;
-    font-size: 0.75rem;
+    font-size: 0.8rem;
     color: #b0b3b8;
+    font-weight: 400;
 }
 
 .message-content {
-    padding: 0.75rem 1rem;
-    border-radius: 18px;
-    line-height: 1.4;
+    padding: 1rem 1.25rem;
+    border-radius: 20px;
+    line-height: 1.45;
     word-wrap: break-word;
     max-width: 100%;
     position: relative;
     font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
-    font-size: 0.95rem;
+    font-size: 1rem;
+    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
 }
 
 .assistant-message .message-content {
     background: #ffffff;
     border: 1px solid #e4e6ea;
     color: #1c1e21;
-    margin-left: 3rem;
-    margin-right: 1rem;
-    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
+    margin-left: 3.5rem;
+    margin-right: 1.5rem;
+    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
 }
 
 .user-message .message-content {
-    background: #0084ff;
+    background: linear-gradient(135deg, #1877f2 0%, #166fe5 100%);
     color: #ffffff;
     margin-right: 0;
     margin-left: auto;
-    max-width: 80%;
+    max-width: 85%;
     align-self: flex-end;
-    box-shadow: 0 1px 2px rgba(0, 132, 255, 0.3);
+    box-shadow: 0 2px 8px rgba(24, 119, 242, 0.3);
 }
 
 strong {
     color: #1c1e21;
-    font-weight: 600;
+    font-weight: 700;
 }
 
 em {
@@ -208,23 +225,25 @@ em {
 }
 
 code {
-    background: #f0f2f5;
-    padding: 0.2rem 0.4rem;
-    border-radius: 4px;
+    background: #f5f6f5;
+    padding: 0.25rem 0.5rem;
+    border-radius: 6px;
     font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
     font-size: 0.9em;
-    color: #65676b;
+    color: #1c1e21;
     border: 1px solid #e4e6ea;
+    font-weight: 500;
 }
 
 .math-equation {
-    background: #f0f2f5;
-    padding: 0.2rem 0.4rem;
-    border-radius: 4px;
+    background: #f5f6f5;
+    padding: 0.25rem 0.5rem;
+    border-radius: 6px;
     font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
-    color: #0084ff;
+    color: #1877f2;
     font-size: 0.95em;
     border: 1px solid #e4e6ea;
+    font-weight: 500;
 }
 
 .math-equation sup,
@@ -240,73 +259,50 @@ code {
 }
 
 .input-container {
-    padding: 1rem 0;
+    padding: 1.5rem 0;
     background: #ffffff;
     border-top: 1px solid #e4e6ea;
     position: sticky;
     bottom: 0;
-    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.05);
+    box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.08);
+    border-radius: 12px 12px 0 0;
 }
 
 .input-wrapper {
     display: flex;
-    gap: 0.75rem;
+    gap: 1rem;
     max-width: 100%;
-    padding: 0 1rem;
+    padding: 0 1.5rem;
+    background: #f5f6f5;
+    border-radius: 24px;
+    border: 1px solid #e4e6ea;
 }
 
 #message-input {
     flex: 1;
-    padding: 0.75rem 1rem;
-    border: 1px solid #ccd0d5;
-    border-radius: 22px;
+    padding: 1rem 1.25rem;
+    border: none;
+    border-radius: 20px;
     font-size: 1rem;
     font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
     resize: none;
     outline: none;
-    transition: all 0.2s ease;
-    background: #f0f2f5;
-    min-height: 50px;
-    max-height: 120px;
+    transition: all 0.15s ease;
+    background: #ffffff;
+    min-height: 56px;
+    max-height: 140px;
     overflow-y: auto;
     color: #1c1e21;
+    font-weight: 400;
 }
 
 #message-input:focus {
-    border-color: #0084ff;
     background: #ffffff;
-    box-shadow: 0 0 0 2px rgba(0, 132, 255, 0.2);
+    box-shadow: 0 0 0 3px rgba(24, 119, 242, 0.1);
 }
 
 .send-button {
-    background: #0084ff;
-    border: none;
-    padding: 0.75rem;
-    border-radius: 50%;
-    cursor: pointer;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    transition: all 0.2s ease;
-    min-width: 50px;
-    height: 50px;
-    color: white;
-    font-size: 1rem;
-    box-shadow: 0 1px 2px rgba(0, 132, 255, 0.3);
-}
-
-.send-button:hover:not(:disabled) {
-    background: #0066cc;
-    transform: translateY(-1px);
-    box-shadow: 0 2px 4px rgba(0, 132, 255, 0.4);
-}
-
-.send-button:disabled {
-    opacity: 0.5;
-    cursor: not-allowed;
-    background: #e4e6ea;
-    transform: none;
-}
+    background: linear-gradient(
 
 .input-footer {
     text-align: center;