html, body, div, span, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, address, em, img, dl, dt, dd, ol, ul, li, form, label,
table, caption, tbody, tfoot, thead, tr, th, td, article, aside, figcaption, figure, footer, header, menu, nav, section, time, video {
    margin: 0px;
    padding: 0px;
    border: none;
    outline: none;
    box-sizing: border-box;
}

button {
    border: none;
    background-color: transparent;
    outline: none;
    appearance: none;
    cursor: pointer;
}

html {
    touch-action: manipulation;
    font-size: 12px;
}
@media print, (min-width: 600px) {
    html {
        font-size: 16px;
    }
}

body {
    color: #000;
    font-family: "Noto Sans Japanese", sans-serif;
}

.header {
    position: relative;
    background-color: #000;
    text-align: center;
    color: #fff;
}

.header h1 {
    padding: 1em 0px;
    font-size: 1.5rem;
}

.button_option,
.button_help {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 2rem;
    height: 2rem;
}
.button_option {
    left: 1rem;
}
.button_help {
    right: 1rem;
}
.button_option::before,
.button_help::before {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
    color: #fff;
    font-size: 2rem;
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
}
.button_option::before {
    content: "\f013";
}
.button_help::before {
    content: "\f059";
}

.list li {
    margin: 1em 0px 0px 1.5em;
}

.footer {
    padding: 1em 0px;
    background-color: #000;
    text-align: center;
}

.footer a {
    color: #fff;
    text-decoration: none;
}

.footer a + a:before {
    margin: 0px 1em;
    content: "/";
}

article {
    width: 98%;
    padding: 20px 0px;
    margin: 0px auto;
}
@media print, (min-width: 900px) {
    article {
        width: 900px;
    }
}

input {
    padding: 0px;
    box-sizing: border-box;
}
input:focus {
    outline: none;
}
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    -moz-appearance: textfield;
}

button {
    outline: none;
    border: none;
    appearance: none;
    cursor: pointer;
}

.items {
    display: flex;
    flex-wrap: wrap;
    margin: -20px 0px 0px;
}

.item {
    position: relative;
    padding: 10px;
    margin: 20px 10px 0px;
    width: calc(100% - 20px);
    box-shadow: 0px 3px 6px rgba(0, 0, 0, 0.4);
    overflow: hidden;
}
@media print, (min-width: 600px) {
    .item {
        width: calc(50% - 20px);
    }
}

.item_timestamp {
    position: absolute;
    top: 0px;
    right: 1em;
    color: #ddd;
    font-size: 12px;
}

.item_title {
    position: relative;
    border-bottom: 2px solid #000;
    text-align: center;
}

.item_title input {
    padding: 10px 0px;
    width: calc(100% - 6em);
    border: none;
    background-color: transparent;
    font-size: 1.25rem;
    text-align: center;
}

.btn_reset {
    position: absolute;
    top: 50%;
    left: 0px;
    transform: translateY(-50%);
    padding: 1.5rem 0px 0px;
    width: 3rem;
    height: 0px;
    background: none;
    color: currentColor;
}
.btn_reset::before {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
    color: currentColor;
    font-size: 1.5rem;
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    content: "\f0e2";
}

.item_count {
    position: relative;
    margin-top: 10px;
    text-align: center;
}

.item_count input {
    width: calc(100% - 3em);
    border: none;
    font-size: 3rem;
    text-align: center;
}

.item_count button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    padding: 3rem 0px 0px;
    width: 3rem;
    height: 0px;
    background: none;
    color: currentColor;
}
.item_count button::before,
.item_count button::after {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
    background-color: currentColor;
    content: "";
}
.item_count button::before {
    width: 100%;
    height: 15%;
}

.btn_minus {
    left: 0px;
}

.btn_plus {
    right: 0px;
}
.btn_plus::after {
    width: 15%;
    height: 100%;
}

.popup_main_content button {
    display: block;
    width: 90%;
    max-width: 500px;
    padding: 1em 2em;
    margin: 0px auto;
    background-color: #000;
    color: #fff;
    font-size: 18px;
    text-align: center;
}

.popup_main_content button + button {
    margin-top: 2em;
}

.popup_main_content .btn_sort_title_asc {
    margin-top: 4em;
}

.popup {
    position: fixed;
    top: 0px;
    left: 0px;
    right: 0px;
    bottom: 0px;
    z-index: 9999;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.5);
    font-size: 16px;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.5s;
}

.popup.js_open {
    visibility: visible;
    opacity: 1;
}

.popup_main {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
    width: 90vw;
    max-width: 800px;
    height: 75vh;
    border: 2px solid #000;
    background-color: #fff;
}

.popup_main_button {
    position: absolute;
    top: 0px;
    right: 0px;
    width: 3em;
    height: 3em;
    background: none;
}
.popup_main_button::before {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
    color: #000;
    font-size: 2em;
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    content: "\f00d";
}

.popup_main_content {
    position: absolute;
    top: 2em;
    left: 2em;
    right: 2em;
    bottom: 2em;
    overflow-y: auto;
}

.popup_main_content h2 {
    padding: 0px 0.5em 0.5em;
    border-bottom: solid 2px #000;
    text-align: center;
}

.popup_main_content .list {
    display: table;
    margin: 1em auto 0px;
}