body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f7f6;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 500px;
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
    font-size: 1.5rem;
}

.section-title {
    font-weight: bold;
    color: #2c3e50;
    margin-top: 20px;
    margin-bottom: 10px;
    border-bottom: 2px solid #eee;
    padding-bottom: 5px;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    color: #666;
}

input[type="text"],
select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box; /* Important for padding */
    font-size: 16px;
}

input[type="text"]:focus,
select:focus {
    border-color: #3498db;
    outline: none;
}

.checkbox-group {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.checkbox-group input {
    margin-right: 10px;
    width: auto;
}

.checkbox-group label {
    margin-bottom: 0;
    font-weight: normal;
    cursor: pointer;
}

button {
    width: 100%;
    padding: 12px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
    margin-top: 20px;
}

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

.message {
    margin-top: 20px;
    text-align: center;
    padding: 10px;
    border-radius: 4px;
}

.success {
    background-color: #d4edda;
    color: #155724;
}

.error {
    background-color: #f8d7da;
    color: #721c24;
}

.closed-message {
    text-align: center;
}

/* Mobile optimizations */
@media (max-width: 480px) {
    .container {
        padding: 20px;
    }
}