body {
    font-family: Arial, sans-serif;
    margin: 20px;
}

h1 {
    text-align: center;
    margin-bottom: 20px;
    padding: 70px;
    letter-spacing: 3px;
    background-color: #c7c7c7;
}

.radio-button {
    display: inline-block;
    background-color: #c3c3c3;
    border: 2px solid #000000;
    padding: 8px 16px;
    margin-right: 10px;
    border-radius: 4px;
    cursor: pointer;
}

.radio-button.selected {
    background-color: #000000;
    color: #fff;
}

input[type="numbers"] {
    padding: 5px;
    margin-bottom: 10px;
}

button {
    padding: 8px 20px;
    background-color: #989898;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background-color: #000000;
}

#search_option {
    margin-bottom: 10px;
    display: flex;
    justify-content: center;
}

#student_list,
#search_result {
    margin-top: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: left;
}

th {
    background-color: #c3c3c3;
    /* color: #fff; */
}

#student_list table,
#search_result table {
    margin-top: 10px;
}

#search {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 20px;
}

#search_by_enrollment, #search_by_course {
    width: 300px;
    height: 50px;
    font-size: 18px;
}

#search_text {
    height: 40px;
    width: 100%;
    font-size: 20px;
    padding-left: 14px;
}

#click {
    width: 20%;
    /* height: 51px; */
    font-size: 20px;
}