* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, #74ebd5, #acb6e5);
}

.chat-container {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    width: 90%;
    max-width: 400px;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.chat-container:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.intro-header {
    background: #333;
    color: #fff;
    padding: 20px;
    text-align: center;
    border-bottom: 2px solid #77aaff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.intro-header img {
    width: 50%;
    min-width: 300px;
}

.chat-box {
    padding: 20px;
    height: 300px;
    overflow-y: auto;
    border-bottom: 1px solid #ddd;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.message {
    padding: 10px;
    border-radius: 10px;
    max-width: 80%;
    word-wrap: break-word;
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.user-message {
    background: #007bff;
    color: #fff;
    align-self: flex-end;
    border-bottom-right-radius: 0;
}

.bot-message {
    background: #f1f1f1;
    color: #333;
    align-self: flex-start;
    border-bottom-left-radius: 0;
}

.chat-input {
    display: flex;
    padding: 20px;
    background: #f9f9f9;
    justify-content: flex-end;
}

.chat-input input {
    flex: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    margin-right: 10px;
    outline: none;
    transition: border 0.3s ease;
}

.chat-input input:focus {
    border-color: #007bff;
}

.chat-input button {
    padding: 10px 20px;
    border: none;
    background: #007bff;
    color: #fff;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

.chat-input button:hover {
    background: #0056b3;
}

#loader {
    font-size: 25px;
    text-align: center;
}