.contact-form {
    max-width: 600px;
    margin: 0 auto;
    padding: 30px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.contact-form h3 {
    color: #2c3e50;
    margin-bottom: 20px;
    text-align: center;
}

.contact-form .form-row {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.contact-form .form-group {
    flex: 1;
    margin-bottom: 20px;
}

.contact-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #34495e;
}

.contact-form input,
.contact-form textarea,
.contact-form select {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    box-sizing: border-box;
}

.contact-form input:required,
.contact-form textarea:required,
.contact-form select:required {
    border-left: 4px solid #3498db;
}

.contact-form input:optional,
.contact-form textarea:optional,
.contact-form select:optional {
    border-left: 4px solid #95a5a6;
}

.contact-form input:required:valid,
.contact-form textarea:required:valid,
.contact-form select:required:valid {
    border-color: #27ae60;
}

.contact-form input:required:invalid:not(:placeholder-shown),
.contact-form textarea:required:invalid:not(:placeholder-shown),
.contact-form select:required:invalid:not(:placeholder-shown) {
    border-color: #e74c3c;
}

.contact-form .form-group:has(input:required) label::after,
.contact-form .form-group:has(textarea:required) label::after,
.contact-form .form-group:has(select:required) label::after {
    content: " *";
    color: #e74c3c;
    font-weight: bold;
}

.contact-form .form-group:has(input:optional) label::after,
.contact-form .form-group:has(textarea:optional) label::after,
.contact-form .form-group:has(select:optional) label::after {
    content: " (optional)";
    color: #7f8c8d;
    font-size: 0.9em;
    font-weight: normal;
}

.contact-form textarea {
    min-height: 120px;
    resize: vertical;
}

.contact-form .submit-button {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    padding: 16px 32px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.contact-form .submit-button:hover {
    background: linear-gradient(135deg, #2980b9, #1f4e79);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

@media (max-width: 768px) {
    .contact-form .form-row {
        flex-direction: column;
        gap: 0;
    }
}