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

body {
    font-family: "Arial", sans-serif;
    background-color: #f4f4f4;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    line-height: 1.6;
}

header {
    background-color: #2c3e50;
    color: white;
    padding: 20px;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

header img {
    opacity: 0.8;
}

main {
    flex: 1;
    padding: 30px;
    color: #2c3e50;
    margin: 0 auto;
    width: 100%;
    max-width: 800px;
    background-color: white;
    margin-top: 20px;
    margin-bottom: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.05);
}

header h1 {
    color: #ffffff;
    opacity: 0.9;
    margin-bottom: 15px;
    border: none;
}

main h1 {
    color: #2c3e50;
    margin-top: 15px;
    margin-bottom: 10px;
    border-bottom: 2px solid #2c3e50;
    padding-bottom: 10px;
}

main h2, main h3 {
    color: #2c3e50;
    margin-top: 25px;
    margin-bottom: 10px;
}

p {
    margin-bottom: 15px;
}

ul {
    margin-bottom: 15px;
    padding-left: 20px;
}

li {
    margin-bottom: 5px;
}

footer {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 20px;
    margin-top: auto;
}

container-chat {
    padding: 20px;
}

.copyright {
    font-size: 0.9rem;
    color: #bdc3c7;
}

.date {
    font-style: italic;
    color: #7f8c8d;
    margin-bottom: 20px;
}

address {
    font-style: normal;
    margin-top: 10px;
}