h1 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid #3498db;
}

.intro {
    text-align: center;
    margin-bottom: 40px;
    color: #555;
    line-height: 1.8;
}

.form-container {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

.form-row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px 20px;
}

.form-group {
    flex: 1 0 50%;
    padding: 0 15px;
    margin-bottom: 20px;
    box-sizing: border-box;
}

.form-group.full-width {
    flex: 1 0 100%;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
}

label:after {
    content: " *";
    color: #e74c3c;
}

label.no-start::after {
    content: '';
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    transition: border-color 0.3s;
}

textarea {
    height: 150px;
    resize: vertical;
}

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

.submit-btn {
    display: block;
    width: 200px;
    margin: 30px auto 0;
    padding: 12px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.submit-btn:hover {
    background-color: #2980b9;
}

@media (max-width: 600px) {
    .form-group {
        flex: 1 0 100%;
    }
}