html,
body {
    height: 100%;
}

.my_base {
    margin: 0;
    height: 100%;
    background-color: #fdfdfd;
}

.holy-grail {

    margin: 0;
    background-color: #fdfdfd;

    min-height: 100vh;
    position: relative;
    /*←相対位置*/
    padding-bottom: 120px;
    /*←footerの高さ*/
    box-sizing: border-box;
    /*←全て含めてmin-height:100vhに*/
}

.holy-grail__main {
    /* Take the remaining height */
    flex-grow: 1;

    /* Layout the left sidebar, main content and right sidebar */
    display: flex;
    flex-direction: row;

    height: 100%;
}

.holy-grail__left {
    width: 0%;

    background-color: #95afb1;
    background-color: #a1acad1c;
}

.holy-grail__middle {
    /* Take the remaining width */
    flex-grow: 1;

    margin: 2rem;

    background-color: #fdfdfd;
}

.holy-grail__right {
    width: 0%;

    background-color: #a1acad1c;
}

header{
    
    /*←絶対位置*/
    top: 0;
    /*上に固定*/
}

.head_card {
    display: flex;
    flex-direction: column;
    background-color: #2a3752;

    /*背景画像のサイズ指定*/
    /*background-size: auto 100%;*/
    /*background-image: url("../test.jpg");*/
}

.head_card__cover {
    margin: 1rem;
    height: 5rem;
    width: 100%;
    color: #fdfdfd;
}

.head_card__cover a,
.head_card__cover:hover a,
.head_card__cover:visited a {
    color: inherit;
}

.head_card__content {
    /* Take available height */
    flex: 1;
    font-size: 4rem;
    text-align: center;

    color: #fdfdfd;
}

.my_space {
    height: 1rem;
}

.my_text {
    font-size: 1.5rem;
}
.my_function_list {
    font-size: 1.5rem;
}
.my_release {
    font-size: 1.5rem;
}

.my_link {
    font-size: 1.5rem;
}

.layered-card {
    position: relative;

    margin: 0.5rem;
    margin-top: 1rem;

    /* Demo */
    height: 8rem;
    width: 95%;

    background: rgb(255, 246, 118);
}


.layered-card__content {
    /* Position */
    top: 1px;
    left: 1px;
    position: absolute;

    /* Size */
    height: 100%;
    width: 100%;

    z-index: 1;

    background: rgb(252, 253, 237);
}


.card {
    display: flex;
    flex-direction: column;

    font-size: 3rem;
}

.card__cover {
    height: 2.1rem;
    font-size: 2rem;
    width: 100%;
    background-color: #ececec;
}

.card__content {
    /* Take available height */
    flex: 1;
    font-size: 1.5rem;
}


.button-with-icon {
    /* Center the content */
    align-items: center;
    display: flex;
    flex-direction: row;
    justify-content: center;
}

.button-with-icon__label {
    margin-left: 0.5rem;
}




.separator {
    /* Content is centered horizontally */
    align-items: center;
    display: flex;

    /* Used to set the position of text */
    position: relative;

}

.separator__content {
    /* We won't see the separator line */
    background: #fff;

    /* Displayed at the center of separator */
    left: 50%;
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);


    /* Spacing */
    padding: 0 0.25rem;

    /* Demo */
    width: 60%;
}

.separator__separator {
    border-bottom: 1px solid #d1d5db;
    height: 1px;
    width: 100%;
}



.calendar {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
}

.calendar__weekday {
    border-bottom: 1px solid #d1d5db;
    padding: 0.125rem;
}

.calendar__day {
    border-bottom: 1px solid #d1d5db;
    border-right: 1px solid #d1d5db;
    padding: 0.25rem;
    text-align: center;
}

.calendar__day--current {
    background-color: #3b82f6;
    color: #fff;
}

.calendar__day:nth-child(7n + 1) {
    border-left: 1px solid #d1d5db;
}

.calendar__day--disabled {
    color: #d1d5db;
}

.previous-next-buttons {
    align-items: center;
    display: flex;
    justify-content: space-between;
}

.arrow-button {
    /* Transparent background */
    background-color: transparent;

    /* Size */
    height: 12px;
    width: 12px;
}

.arrow-button--t {
    /* Edges */
    border-left: 1px solid #d1d5db;
    border-top: 1px solid #d1d5db;
    transform: translateY(25%) rotate(45deg);
}

.arrow-button--r {
    /* Edges */
    border-right: 1px solid #d1d5db;
    border-top: 1px solid #d1d5db;
    transform: translateX(-25%) rotate(45deg);
}

.arrow-button--b {
    /* Edges */
    border-bottom: 1px solid #d1d5db;
    border-right: 1px solid #d1d5db;
    transform: translateY(-25%) rotate(45deg);
}

.arrow-button--l {
    /* Edges */
    border-bottom: 1px solid #d1d5db;
    border-left: 1px solid #d1d5db;
    transform: translateX(25%) rotate(45deg);
}

footer {
    width: 100%;
    height: 3rem;
    text-align: center;
    background-color: #f5f5ff;

    position: absolute;
    /*←絶対位置*/
    bottom: 0;
    /*下に固定*/

}

*,
*:before,
*:after {
    -webkit-box-sizing: inherit;
    box-sizing: inherit;
}

html {
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    font-size: 62.5%;
}

.btn,
a.btn,
button.btn {
    font-size: 1.6rem;
    font-weight: 700;
    line-height: 1.5;
    position: relative;
    display: inline-block;
    padding: 1rem 4rem;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-transition: all 0.3s;
    transition: all 0.3s;
    text-align: center;
    vertical-align: middle;
    text-decoration: none;
    letter-spacing: 0.1em;
    color: #212529;
    border-radius: 0.5rem;
}

a.btn-flat {
    overflow: hidden;
    padding: 1.5rem 6rem;
    color: #fff;
    border-radius: 0;
    background: #000;
}

a.btn-flat span {
    position: relative;
}

a.btn-flat:before {
    position: absolute;
    top: 0;
    left: 30px;
    width: 150%;
    height: 500%;
    content: '';
    transition: all .5s ease-in-out;
    transform: translateX(-98%) translateY(-70%) rotate(135deg);
    background: #fff100;
}

a.btn-flat:hover:before {
    transform: translateX(-9%) translateY(-25%) rotate(135deg);

}

/* アコーディオン */
.toggle {
    display: none;
}

.Label {
    /*タイトル*/
    padding: 0.1rem;
    padding-left: 1rem;
    display: block;
    color: rgba(12, 12, 12, 0.582);
    background: #e9e9e9;
}

.Label_function {
    /*タイトル*/
    padding: 0.1rem;
    padding-left: 1rem;
    display: block;
    color: rgb(34, 33, 33);
    background: #e9e9e9;
}

.my_section {
    /*タイトル*/
    padding: 0.1rem;
    padding-left: 1rem;
    display: block;
}

.Label::before {
    /*タイトル横の矢印*/
    content: "";
    width: 6px;
    height: 6px;
    border-top: 2px solid #fff;
    border-right: 2px solid #fff;
    -webkit-transform: rotate(45deg);
    position: absolute;
    top: calc(50% - 3px);
    right: 20px;
    transform: rotate(135deg);
}

.Label_function::before {
    /*タイトル横の矢印*/
    content: "";
    width: 6px;
    height: 6px;
    border-top: 2px solid rgb(0, 0, 0);
    border-right: 2px solid rgb(0, 0, 0);
    -webkit-transform: rotate(45deg);
    position: absolute;
    top: calc(50% - 3px);
    right: 20px;
    transform: rotate(135deg);
}

.Label,
.Label_function,
.toggle_content {
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    transform: translateZ(0);
    transition: all 0.3s;
}

.toggle_content {
    /*本文*/
    height: 0;
    margin-bottom: 10px;
    padding: 0 5px;
    overflow: hidden;
}

.toggle:checked+.Label+.toggle_content,
.toggle:checked+.Label_function+.toggle_content {
    /*開閉時*/
    height: auto;
    padding: 5px;
    transition: all .3s;
}

.toggle:checked+.Label::before,
.toggle:checked+.Label_function::before {
    transform: rotate(-45deg) !important;
}