/* استایل فرم همکاری */
.collaborate-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 16px;
    background: linear-gradient(135deg, #f1f3f4, #e8eaed);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.form-field select {
    width: 100%;
    padding: 10px;
    font-size: 14px;
    border: 1px solid #dadce0;
    border-radius: 6px;
    background-color: #fff;
    transition: border-color 0.2s;
    color: #2c2f33;
}

.form-field select:focus {
    border-color: #4285f4;
    outline: none;
}

.form-field select:invalid {
    color: #5f6368; /* رنگ placeholder */
}