body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    margin: 0;
    padding: 20px;
    background: #f5f5f5;
    height: 100vh;
    box-sizing: border-box;
}

.chat-container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
    overflow: hidden;
    height: calc(100vh - 40px);
    display: flex;
    flex-direction: column;
}

/* Header styles */
.header {
    background: linear-gradient(135deg, #2c3e50 0%, #2c3e50 100%);
    color: white;
    padding: 6px;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 16px;
    position: relative;
}
.header img {
    align-self: flex-start;
    height: 48px;
    width: auto;
    margin-left: 8px;
    margin-right: 8px;
    margin-top: 8px;
    flex-shrink: 0;
    position: static;
    z-index: 1;
}
.header-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    flex: 1;
    max-width: 100%;
}
.header-text h1, .header-text p {
    margin: 8px 0;
}

/* Responsive design for mobile devices */
@media (max-width: 600px) {
    body {
        padding: 4px;
    }
    .chat-container {
        max-width: 100vw;
        height: 100vh;
        border-radius: 0;
        box-shadow: none;
    }
    .header {
        min-height: 40px;
        flex-direction: column;
        gap: 8px;
        padding: 8px 4px;

    }
    .header img {
        height: 32px !important;
        margin: 0;
    }
    .header-text {
        margin-top: 2px;
        align-items: flex-start;
        text-align: left;
        width: 100%;
        max-width: none;
        font-size: small;
    }
    .messages {
        padding: 8px 4px;
        gap: 8px;
    }
    .message {
        max-width: 98%;
        padding: 8px 10px;
        word-break: break-word;
    }
    .input-container {
        padding: 8px 4px;
        gap: 4px;
        flex-direction: row;
        align-items: stretch;
    }
    #messageInput {
        padding: 10px 12px;
        border-radius: 18px;
    }
    #sendBtn {
        width: auto;
        min-width: 80px;
        padding: 12px 0 12px 0;
        border-radius: 18px;
    }
    .assistant pre {
        padding: 0.5em;
    }
    .image-container {
        padding: 4px;
    }
    .generated-image {
        max-width: 98vw;
        max-height: 200px;
    }
}



.messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message {
    max-width: 80%;
    padding: 12px 16px;
    border-radius: 18px;
    line-height: 1.4;
}

.user {
    background: #007bff;
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.assistant {
    background: #f1f3f5;
    color: #333;
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

/* Markdown styling for assistant messages */
.assistant h1, .assistant h2, .assistant h3 {
    margin: 0.5em 0 0.3em 0;
    color: #2c3e50;
}

.assistant h3 {
    font-size: 1.1em;
    font-weight: 600;
}

.assistant ul, .assistant ol {
    margin: 0.5em 0;
    padding-left: 1.2em;
}

.assistant li {
    margin: 0.2em 0;
}

.assistant p {
    margin: 0.5em 0;
    line-height: 1.5;
}

.assistant strong {
    font-weight: 600;
    color: #2c3e50;
}

.assistant code {
    background: #e9ecef;
    padding: 0.1em 0.3em;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

.assistant pre {
    background: #f8f9fa;
    border: 1px solid #e9ecef;
    border-radius: 5px;
    padding: 0.8em;
    overflow-x: auto;
    margin: 0.5em 0;
}

.assistant blockquote {
    border-left: 3px solid #007bff;
    margin: 0.5em 0;
    padding-left: 1em;
    color: #666;
}

.input-container {
    padding: 20px;
    border-top: 1px solid #eee;
    display: flex;
    gap: 10px;
    align-items: center;
}

#fileBtn {
    background: linear-gradient(135deg, #1eb7ec 0%, #71ceec 100%);
    color: white;
    border: none;
    padding: 12px 16px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    margin-right: 8px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: auto;
    height: 44px;
    font-weight: 500;
}

#fileBtn:hover {
    background: linear-gradient(135deg, #1eb7ec 0%, #71ceec 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(102, 126, 234, 0.3);
}

.clear-btn {
    background: linear-gradient(135deg, #1eb7ec 0%,  #71ceec 100%);
    color: white;
    border: none;
    padding: 12px 16px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    margin-right: 8px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: auto;
    height: 44px;
    font-weight: 500;
}

.clear-btn:hover {
    background: linear-gradient(135deg, #1eb7ec 0%,  #71ceec 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(102, 126, 234, 0.3);
}

#messageInput {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid #e9ecef;
    border-radius: 25px;
    outline: none;
    font-size: 14px;
}

#messageInput:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

#sendBtn {
    padding: 12px 24px;
    background: linear-gradient(135deg, #1eb7ec 0%,  #71ceec 100%);
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

#sendBtn:hover {
    background: linear-gradient(135deg, #1eb7ec 0%,  #71ceec 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

#sendBtn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.typing-indicator {
    background: #f1f3f5;
    color: #666;
    align-self: flex-start;
    border-bottom-left-radius: 4px;
    font-style: italic;
}

.cursor {
    animation: blink 0.8s infinite;
    color: #007bff;
    font-weight: bold;
    display: inline-block;
}

@keyframes blink {
    0%, 60% { opacity: 1; }
    61%, 100% { opacity: 0.3; }
}

/* Smooth transition for progressive rendering */
.assistant {
    transition: none; /* Remove transition for faster rendering */
}

/* Ensure code blocks don't break during progressive rendering */
.assistant pre {
    word-wrap: break-word;
    white-space: pre-wrap;
}

/* Optimize rendering performance */
.assistant * {
    contain: layout style;
}

.file-info {
    background: #e3f2fd;
    border: 1px solid #2196f3;
    border-radius: 8px;
    padding: 8px 12px;
    margin: 5px 0;
    font-size: 12px;
    color: #1976d2;
    display: flex;
    align-items: center;
    gap: 8px;
}

.file-info .file-name {
    font-weight: 500;
}

.file-info .file-size {
    color: #666;
}

.uploading {
    opacity: 0.7;
}

/* Image display styles */
.image-container {
    margin: 10px 0;
    padding: 8px;
    background: #f8f9fa;
    border-radius: 8px;
    border: 1px solid #e9ecef;
    text-align: center;
}

.generated-image {
    max-width: 100%;
    max-height: 400px;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    display: block;
    margin: 0 auto;
}

.image-caption {
    margin: 8px 0 0 0;
    font-size: 12px;
    color: #666;
    font-style: italic;
}

/* File link styles */
.assistant a {
    color: #007bff;
    text-decoration: none;
}

.assistant a:hover {
    text-decoration: underline;
}

/* Service status messages */
.service-status {
    border-radius: 12px !important;
    padding: 16px !important;
    margin: 10px 0 !important;
    font-weight: 500;
    text-align: center;
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Disabled input state */
#messageInput:disabled {
    background-color: #f8f9fa;
    color: #6c757d;
    cursor: not-allowed;
}

#messageInput:disabled::placeholder {
    color: #6c757d;
    font-style: italic;
}

/* Typing indicator styles */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px !important;
    background: #f8f9fa !important;
    border: 1px solid #e9ecef;
    animation: fadeIn 0.3s ease-in;
}

.typing-animation {
    display: flex;
    gap: 4px;
}

.typing-animation .dot {
    width: 8px;
    height: 8px;
    background: #6c757d;
    border-radius: 50%;
    animation: typingDots 1.5s infinite;
}

.typing-animation .dot:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-animation .dot:nth-child(3) {
    animation-delay: 0.4s;
}

.typing-text {
    color: #6c757d;
    font-style: italic;
    font-size: 14px;
}

@keyframes typingDots {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.4;
    }
    30% {
        transform: translateY(-10px);
        opacity: 1;
    }
}

/* Enhanced button states */
#sendBtn:disabled {
    background: #6c757d !important;
    cursor: not-allowed;
    opacity: 0.8;
}

#sendBtn.processing {
    background: #28a745;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.7; }
    100% { opacity: 1; }
}