styles.css

body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #121212;
}

.chat-container {
    width: 360px;
    height: 540px;
    border: 1px solid #333;
    border-radius: 12px;
    background-color: #1e1e1e;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.5s ease-in;
}

.chat-box {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 15px;
    border-bottom: 1px solid #333;
    position: relative;
}

.messages {
    display: flex;
    flex-direction: column;
    transition: opacity 0.3s ease-in-out;
}

.message {
    padding: 10px 15px;
    border-radius: 10px;
    margin-bottom: 8px;
    max-width: 80%;
    word-wrap: break-word;
    color: #f5f5f5;
    opacity: 0;
    animation: fadeInMessage 0.5s ease-in forwards;
}

.user-message {
    align-self: flex-end;
    background-color: #4caf50;
    border: 1px solid #388e3c;
}

.bot-message {
    align-self: flex-start;
    background-color: #2196f3;
    border: 1px solid #1976d2;
}

.input-area {
    display: flex;
    padding: 12px;
    border-top: 1px solid #333;
    background-color: #1e1e1e;
}

input[type="text"] {
    flex: 1;
    padding: 12px;
    border: 1px solid #333;
    border-radius: 20px;
    margin-right: 12px;
    background-color: #333;
    color: #f5f5f5;
    outline: none;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.3);
    transition: border-color 0.3s ease;
}

input[type="text"]::placeholder {
    color: #888;
}

input[type="text"]:focus {
    border-color: #f5f5f5;
}

button {
    padding: 12px 18px;
    border: none;
    border-radius: 20px;
    background-color: #ff5722;
    color: white;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

button:hover {
    background-color: #e64a19;
    transform: scale(1.05);
}

.typing-indicator {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 10px;
}

.typing-indicator .dot {
    width: 10px;
    height: 10px;
    margin: 0 4px;
    background-color: #888;
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out;
}

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

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

@keyframes typing {
    0%, 100% {
        opacity: 0.2;
    }
    50% {
        opacity: 1;
    }
}

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

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