* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
}

.container {
    max-width: 800px;
    margin: 20px auto;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    overflow: hidden;
}

h1 {
    background: #4285f4;
    color: white;
    padding: 20px;
    text-align: center;
}

.user-info {
    padding: 10px 20px;
    background: #f8f9fa;
    border-bottom: 1px solid #ddd;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.reset-btn {
    padding: 5px 15px;
    background: #dc3545;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
}

.reset-btn:hover {
    background: #c82333;
}

.chat-box {
    height: 500px;
    overflow-y: auto;
    padding: 20px;
    background: #fafafa;
}

.message {
    margin-bottom: 15px;
    padding: 10px 15px;
    border-radius: 8px;
    max-width: 80%;
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 5px;
}

.message-time {
    font-size: 11px;
    color: #666;
    font-weight: normal;
}

.message-content {
    word-wrap: break-word;
}

.message.user {
    background: #e3f2fd;
    margin-left: auto;
    text-align: right;
}

.message.bot {
    background: #f1f3f4;
}

.input-area {
    display: flex;
    padding: 15px;
    background: white;
    border-top: 1px solid #ddd;
}

#userInput {
    flex: 1;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

#sendBtn {
    margin-left: 10px;
    padding: 12px 30px;
    background: #4285f4;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}

#sendBtn:hover {
    background: #3367d6;
}

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