/* Placeholder for style.css */
body {
    font-family: Arial, sans-serif;
    background-color: #f2f3f5;
    margin: 0;
    padding: 0;
    color: #333;
}

header {
    background-color: #2c3e50;
    padding: 15px 20px;
    color: white;
}

header h1 {
    margin: 0;
    font-size: 24px;
}

nav a {
    color: white;
    margin-right: 15px;
    text-decoration: none;
    font-weight: bold;
}

nav a:hover {
    text-decoration: underline;
}

.container {
    max-width: 800px;
    margin: 30px auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

form input[type="text"],
form input[type="email"],
form input[type="password"] {
    width: 100%;
    padding: 10px;
    margin-bottom: 12px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

form button {
    padding: 10px 15px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

form button:hover {
    background-color: #2980b9;
}

#chat-box {
    height: 300px;
    overflow-y: auto;
    border: 1px solid #ccc;
    padding: 10px;
    background: #fafafa;
    margin-bottom: 15px;
}

#chat-box p {
    margin: 5px 0;
}

footer {
    text-align: center;
    padding: 20px;
    background-color: #ecf0f1;
    margin-top: 30px;
}
.message {
    position: relative;
}

.message.sender::after {
    content: '';
    position: absolute;
    top: 10px;
    right: -10px;
    border: 10px solid transparent;
    border-left-color: #dcf8c6;
}

.message.receiver::after {
    content: '';
    position: absolute;
    top: 10px;
    left: -10px;
    border: 10px solid transparent;
    border-right-color: #f1f0f0;
}
.message {
    max-width: 70%;
    margin: 5px 0;
    padding: 10px;
    border-radius: 10px;
    clear: both;
}

.message.sender {
    background-color: #dcf8c6;
    float: right;
    text-align: right;
}

.message.receiver {
    background-color: #f1f0f0;
    float: left;
    text-align: left;
}