* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

body {
    background-color: #f0f2f5;
    color: #333;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 20px;
}

h1 {
    font-size: 24px;
    color: #128C7E;
}

.controls {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 10px;
}

.control-group {
    display: flex;
    gap: 10px;
}

.btn {
    padding: 8px 16px;
    background-color: #f1f1f1;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #e1e1e1;
}

.btn.primary {
    background-color: #128C7E;
    color: white;
}

.btn.primary:hover {
    background-color: #0e6b5e;
}

.chat-container {
    position: relative;
    background-color: #e5ddd5;
    background-image: url('data:image/png;base64,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');
    border-radius: 8px;
    min-height: 400px;
    padding: 16px;
    overflow-y: auto;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.chat-background {
    min-height: 380px;
    position: relative;
}

.watermark {
    position: absolute;
    bottom: 5px;
    right: 10px;
    font-size: 10px;
    color: rgba(0, 0, 0, 0.3);
    pointer-events: none;
}

.message {
    display: flex;
    flex-direction: column;
    max-width: 70%;
    margin-bottom: 16px;
    position: relative;
    cursor: move;
}

.message.incoming {
    align-self: flex-start;
    align-items: flex-start;
}

.message.outgoing {
    align-self: flex-end;
    align-items: flex-end;
    margin-left: auto;
}

.message-bubble {
    padding: 8px 12px;
    border-radius: 8px;
    position: relative;
    word-wrap: break-word;
}

.incoming .message-bubble {
    background-color: white;
    border-top-left-radius: 0;
}

.outgoing .message-bubble {
    background-color: #DCF8C6;
    border-top-right-radius: 0;
}

.message-sender {
    font-weight: bold;
    font-size: 13px;
    margin-bottom: 2px;
    color: #128C7E;
}

.message-text {
    font-size: 14px;
    line-height: 1.4;
}

.message-timestamp {
    font-size: 11px;
    color: #999;
    margin-top: 2px;
    align-self: flex-end;
}

.message-actions {
    position: absolute;
    top: -15px;
    right: 0;
    display: none;
}

.message:hover .message-actions {
    display: flex;
}

.message-action-btn {
    background: rgba(255, 255, 255, 0.8);
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    margin-left: 4px;
    font-size: 12px;
}

.message-form {
    background-color: white;
    padding: 16px;
    border-radius: 8px;
    margin-top: 20px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.message-form.hidden {
    display: none;
}

.form-group {
    margin-bottom: 12px;
}

.form-group label {
    display: block;
    margin-bottom: 4px;
    font-size: 14px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

.form-group textarea {
    min-height: 80px;
    resize: vertical;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

@media (max-width: 600px) {
    .container {
        padding: 10px;
    }
    
    .controls {
        flex-direction: column;
    }
    
    .message {
        max-width: 85%;
    }
}