body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #4CAF50;
    color: white;
    text-align: center;
    padding: 2em;
}

h1 {
    margin: 0;
    font-size: 2.5em;
}

h2 {
    color: #333;
    text-align: center;
}

section {
    padding: 2em;
    max-width: 1200px;
    margin: 0 auto;
}

#intro {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1em;
}

.feature {
    background-color: white;
    padding: 1em;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 0.5em 1em;
    cursor: pointer;
    border-radius: 4px;
}

input {
    padding: 0.5em;
    margin: 0.5em 0;
    width: 100%;
    max-width: 300px;
}

form {
    text-align: center;
}

.chat-placeholder {
    background-color: #eee;
    padding: 1em;
    margin-top: 1em;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 1em;
    margin-top: 2em;
}

footer a {
    color: #4CAF50;
    text-decoration: none;
}