body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    background-color: #f4f7f6;
    color: #333;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

h1, h2 {
    color: #2c3e50;
    text-align: center;
}

p {
    text-align: center;
    color: #7f8c8d;
    margin-bottom: 30px;
}

form {
    margin-bottom: 40px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input, textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 16px;
}

textarea {
    height: 120px;
    resize: vertical;
}

button {
    width: 100%;
    padding: 12px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 18px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

hr {
    border: 0;
    border-top: 1px solid #eee;
    margin: 40px 0;
}

.message-card {
    background: #f9f9f9;
    padding: 15px;
    border-left: 4px solid #3498db;
    margin-bottom: 20px;
    border-radius: 4px;
}

.message-card .meta {
    font-size: 0.85em;
    color: #7f8c8d;
    margin-bottom: 10px;
}

.message-card .sender {
    font-weight: bold;
    color: #2c3e50;
}

.message-card .content {
    font-style: italic;
}