@charset "utf-8";

body {
    margin: 0;
    padding: 0;
    font-size: 18px;
    font-family: "SF Pro JP", "SF Pro Text", "SF Pro Icons", "Hiragino Kaku Gothic Pro", "ヒラギノ角ゴ Pro W3", メイリオ, Meiryo, "ＭＳ Ｐゴシック", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-weight: normal;
}

strong {
    color: red;
}

a {
    color: #0366D6;
    text-decoration: none
}

a:hover {
    color: #1A0DAB;
    text-decoration: underline;
}

a:hover img {
    opacity: 0.7;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    margin-top: 3;
}

p {
    line-height: 1.6;
}

header {
    width: 980px;
    margin: 0 auto;
}

header h1 {
    padding: 3px;
    float: left;
}

#main h1 {
    color: black;
    font-size: 26px;
    position: relative;
    padding: 3px 20px 15px 20px;
    animation-name: fadein;
    animation-duration: 0.4s;
}

#main h1:before {
    content: "";
    position: absolute;
    margin: auto;
}

#main h1:before {
    width: 100%;
    height: 5px;
    bottom: 0px;
    left: 0px;
    border-radius: 4px;
    background: linear-gradient(to bottom, #0047b6, #003b99);
    box-shadow: 3px 3px 4px #c3c3c3,
        -3px -3px 4px #f5f5f5;
}

h2 {
    font-size: 23px;
    padding: 8px 14px;
    position: relative;
}

h2:before {
    content: "";
    position: absolute;
    margin: auto;
}

h2:before {
    width: 100%;
    height: 4px;
    bottom: 0px;
    left: 0px;
    border-radius: 4px;
    background: -webkit-linear-gradient(top, #FFF, #fdfdfd);
    background: linear-gradient(to bottom, #FFF, #fdfdfd);
    box-shadow: 1px 1px 2px #c3c3c3,
        -1px -1px 2px #f5f5f5;
}

.h2margin {
    margin-top: 6em;
}

h3 {
    font-size: 19px;
    padding: 4px 9px 4px 14px;
    position: relative;
}

h3:before {
    content: "";
    position: absolute;
    margin: auto;
    width: 3px;
    height: 100%;
    bottom: 0px;
    left: 0px;
    border-radius: 4px;
    background: #ffffff;
    box-shadow: 1px 1px 2px #b3b3b3,
        -1px -1px 2px #f0f0f0;
}

.h3margin {
    margin-top: 4em;
}

.pointmargin {
    margin-top: 3em;
}

h4 {
    font-size: 18px;
    border-left: solid 3px #926875;
    padding: 4px 9px 4px 14px;
}

#global_navi {
    width: 980px;
    clear: both;
    overflow: hidden;
    margin: 0px auto;
}

#global_navi ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

#global_navi ul li {
    background-color: midnightblue;
    width: 162.3333333px;
    font-size: 12px;
    float: left;
    margin-top: auto;
    padding: 0.5px;
    text-align: center;
}

#global_navi ul li a {
    display: block;
    padding: 7px;
    color: #fff;
    text-decoration: none;
    transition: background-color 0.8s linear;
}

#global_navi ul li a:hover {
    background-color: black;
}

#global_navi ul li.current a {
    background-color: black;
}

#main_visual {
    width: 980px;
    height: 330px;
    margin: 0 auto 1px;
    position: relative;
}

#wrapper {
    width: 980px;
    margin: 0 auto;
    overflow: hidden;
}

#main {
    width: 660px;
    padding: 0 0.7%;
    float: left;
}

#sidebar {
    width: 300px;
    float: right;
}

footer {
    background-color: midnightblue;
    text-align: center;
}

footer #footer_nav {
    background-color: #efefef;
    padding: 10px 0;
}

footer #footer_nav ul {
    list-style: none;
    margin: 0;
    padding: 10px 0;
}

footer #footer_nav li {
    display: inline;
    border-left: solid 1px #aaa;
    margin-left: 8px;
    padding-left: 8px;
    font-size: smaller;
}

footer #footer_nav li:last-child {
    display: inline;
    border-right: solid 1px #aaa;
    padding: 0 8px;
}

footer small {
    display: block;
    padding: 8px 0;
    color: #fff;
}

#breadcrumb {
    font-size: smaller;
    padding: 1px;
    margin-top: 5px;
}

#breadcrumb ol {
    list-style: none;
    margin: 0;
    padding: 0;
}

#breadcrumb ol li {
    display: inline;
}

#breadcrumb ol li::after {
    content: ">";
    padding-left: 7px;
}

#breadcrumb ol li:last-child::after {
    content: none;
}

#news dl {
    overflow: hidden;
}

#news dt {
    width: 8em;
    float: left;
    margin-bottom: 10px;
    clear: both;
}

#news dd {
    margin-left: 8em;
    margin-bottom: 10px;
}

#responsive-unit {
    max-width: 336px;
}

#eyecatcharea {
    margin-top: 1em;
    text-align: center
}

.adsense-area,
.adsense-area2 {
    margin-top: 2em;
    text-align: center
}

.mokuji {
    margin-top: 4em;
    margin-bottom: 2em;
    position: relative;
    padding: 0.3em 1.5em;
}

.mokuji:before,
.mokuji:after {
    content: "";
    position: absolute;
    margin: auto;
}

.mokuji:before {
    width: 96%;
    height: 4px;
    bottom: 0px;
    left: 2%;
    border-radius: 4px;
    background: #FFF;
    box-shadow: inset 1px 1px 2px #c3c3c3,
        inset -1px -1px 2px #f5f5f5;
}

.mokuji:after {
    width: 96%;
    height: 4px;
    top: 0px;
    left: 2%;
    border-radius: 4px;
    background: #FFF;
    box-shadow: inset 1px 1px 2px #c3c3c3,
        inset -1px -1px 2px #f5f5f5;
}

.waku {
    padding: 8px;
    overflow: auto;
    border-radius: 6px;
    background: #ffffff;
    box-shadow: 2px 2px 4px #e0e0e0,
        -2px -2px 4px #f9f9f9;
}

.waku2 {
    padding: 8px;
    border: 1px solid;
    border-color: #f8f8f8;
    overflow: auto;
    background: #fdfdfd;
    border-radius: 5px;
    background: #ffffff;
    box-shadow: inset 2px 2px 4px #e0e0e0,
        inset -2px -2px 4px #f9f9f9;
}

.wakumei {
    color: blue;
}

.type-level_color {
    color: blue;
}

.type-level_type:before {
    content: "type：";
}

.type-level_level:before {
    content: "level：";
}

.type-level_title {
    padding: 0.2em 0.5em;
    color: #494949;
    background: #fff;
    font-size: 13px;
    border-radius: 5px;
    box-shadow: 0px 0px 1px #AAA;
    cursor: pointer;
    position: relative;
}

.type-level_title:after {
    font-family: "Font Awesome 5 Free";
    content: "\f107";
    font-weight: 900;
    position: absolute;
    top: 50%;
    right: 8px;
    transform: translateY(-50%);
    transition: 0.1s;
}

.type-level_title.selected:after {
    transform: translateY(-60%) rotateX(180deg);
}

.type-level_txt {
    display: none;
}

.toggle-prac_title:before {
    content: "練習の解答";
}

.toggle-prac_title {
    border-radius: 6px;
    background: #ffffff;
    box-shadow: 2px 2px 4px #e0e0e0,
        -2px -2px 4px #f9f9f9;
    font-size: 16px;
    color: black;
    cursor: pointer;
    width: 98px;
    padding: 5px;
    position: relative;
}

.toggle-prac_title:after {
    font-family: "Font Awesome 5 Free";
    content: "\f107";
    font-weight: 900;
    position: absolute;
    top: 50%;
    right: 8px;
    transform: translateY(-50%);
    transition: 0.1s;
}

.toggle-prac_title.selected:after {
    transform: translateY(-60%) rotateX(180deg);
}

.toggle-prac_txt {
    display: none;
}

.toggle-proof_title:before {
    content: "証明";
}

.toggle-proof_title {
    border-radius: 6px;
    background: #ffffff;
    box-shadow: 2px 2px 4px #e0e0e0,
        -2px -2px 4px #f9f9f9;
    font-size: 16px;
    color: black;
    cursor: pointer;
    width: 50px;
    padding: 5px;
    position: relative;
}

.toggle-proof_title:after {
    font-family: "Font Awesome 5 Free";
    content: "\f107";
    font-weight: 900;
    position: absolute;
    top: 50%;
    right: 8px;
    transform: translateY(-50%);
    transition: 0.1s;
}

.toggle-proof_title.selected:after {
    transform: translateY(-60%) rotateX(180deg);
}

.toggle-proof_txt {
    display: none;
}

/* pracやproofと違ってボタンの文が自由記述なのでwidthはhtmlの方で指定 */
.toggle-free_title {
    border-radius: 6px;
    background: #ffffff;
    box-shadow: 2px 2px 4px #e0e0e0,
        -2px -2px 4px #f9f9f9;
    font-size: 16px;
    color: black;
    cursor: pointer;
    padding: 5px;
    position: relative;
}

.toggle-free_title:after {
    font-family: "Font Awesome 5 Free";
    content: "\f107";
    font-weight: 900;
    position: absolute;
    top: 50%;
    right: 8px;
    transform: translateY(-50%);
    transition: 0.1s;
}

.toggle-free_title.selected:after {
    transform: translateY(-60%) rotateX(180deg);
}

.toggle-free_txt {
    display: none;
}

.returnbox {
    margin-top: 4em;
    margin-bottom: 2em;
    text-align: right;
}

#scrollTop {
    width: 90px;
    height: 90px;
    position: fixed;
    right: 0;
    bottom: 0;
    opacity: 0.6;
    margin-right: 20px;
    margin-bottom: 20px;
}

#scrollTop a {
    position: relative;
    display: block;
    width: 90px;
    height: 90px;
    text-decoration: none;
}

#scrollTop a::before {
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    content: '\f102';
    font-size: 25px;
    color: #003b99;
    position: absolute;
    width: 25px;
    height: 25px;
    top: -40px;
    bottom: 0;
    right: 0;
    left: 0;
    margin: auto;
    text-align: center;
}

#scrollTop a::after {
    content: 'PAGE TOP';
    font-size: 13px;
    color: #fff;
    position: absolute;
    top: 45px;
    bottom: 0;
    right: 0;
    left: 0;
    margin: auto;
    text-align: center;
    color: #003b99;
}

.imp {
    color: red;
}

.aoiro {
    color: blue;
}

.kakomoncolor {
    color: navy;
}

.black {
    color: black;
}

/* アプリ版積分ガチャのタイマーのcss */
#stopwatcharea {
    float: right;
    text-align: center;
    margin-top: 1em;
    margin-bottom: 1em;
    border-radius: 6px;
    background: #ffffff;
    box-shadow: 2px 2px 4px #e0e0e0,
        -2px -2px 4px #f9f9f9;
    font-size: 16px;
    color: black;
    cursor: pointer;
    width: 108px;
    padding: 5px;
    position: relative;
}

#stopwatchareaclicked {
    float: right;
    display: none;
    text-align: right;
    margin-top: 1em;
    margin-bottom: 1em;
    border-radius: 6px;
    border: 1px solid;
    border-color: #f8f8f8;
    background: #ffffff;
    box-shadow: inset 2px 2px 4px #e0e0e0,
        inset -2px -2px 4px #f9f9f9;
    font-size: 16px;
    color: black;
    cursor: pointer;
    width: 108px;
    height: 22px;
    /* 高さ指定しないと解答が全領域に及ばない．22pxが限界 */
    padding: 5px;
    position: relative;
}

.fade-in1 {
    animation-name: fadeinindex;
    animation-duration: 2.7s;
}

.fade-ininf {
    animation-name: fadeininf;
    animation-duration: 2s;
    animation-iteration-count: infinite;
}

@keyframes fadein {
    from {
        opacity: 0.1;
        transform: translateY(9px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeinindex {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeininf {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

canvas {
    display: block;
    vertical-align: bottom;
}

/* ---- particles.js container ---- */

#menu-check {
    display: none;
}

.arrow-pp::before,
.arrow-pp::after,
.arrow-pm::before,
.arrow-pm::after,
.arrow-mp::before,
.arrow-mp::after,
.arrow-mm::before,
.arrow-mm::after {
    content: "";
    position: absolute;
    margin: auto;
}

.arrow-pp {
    left: 3px;
    box-sizing: border-box;
    border: 1px solid transparent;
    border-right: 1px solid #000;
    border-bottom: 1px solid #000;
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
    display: inline-block;
    width: 14px;
    height: 14px;
    border-radius: 0 0 100% 0;
    background: #fff;
}

.arrow-pp::after {
    left: 11px;
    top: -4px;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 2px 5px 2px;
    border-color: transparent transparent #000 transparent;
    transform: rotate(9deg);
}

.arrow-pm {
    left: 3px;
    box-sizing: border-box;
    border: 1px solid transparent;
    border-left: 1px solid #000;
    border-top: 1px solid #000;
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
    display: inline-block;
    width: 14px;
    height: 14px;
    border-radius: 100% 0 0 0;
    background: #fff;
}

.arrow-pm::after {
    left: 12px;
    top: -3px;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 2px 5px 2px;
    border-color: transparent transparent #000 transparent;
    transform: rotate(87deg);
}

.arrow-mp {
    left: 3px;
    box-sizing: border-box;
    border: 1px solid transparent;
    border-bottom: 1px solid #000;
    border-left: 1px solid #000;
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
    display: inline-block;
    width: 14px;
    height: 14px;
    border-radius: 0 0 0 100%;
    background: #fff;
}

.arrow-mp::after {
    left: 12px;
    top: 10px;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 2px 5px 2px;
    border-color: transparent transparent #000 transparent;
    transform: rotate(91deg);
}

.arrow-mm {
    left: 3px;
    box-sizing: border-box;
    border: 1px solid transparent;
    border-right: 1px solid #000;
    border-top: 1px solid #000;
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
    display: inline-block;
    width: 14px;
    height: 14px;
    border-radius: 0 100% 0 0;
    background: #fff;
}

.arrow-mm::after {
    left: 11px;
    top: 10px;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 2px 5px 2px;
    border-color: transparent transparent #000 transparent;
    transform: rotate(165deg);
}

.gaming {
    /* アニメーションの長さ */
    animation: gaming 4s linear infinite;
}

@keyframes gaming {

    /* 色の指定 */
    0% {
        color: red;
    }

    60% {
        color: orangered;
    }

    70% {
        color: magenta;
    }

    80% {
        color: cyan;
    }

    85% {
        color: yellow;
    }

    90% {
        color: limegreen;
    }

    100% {
        color: red;
    }
}

/* 2022年2月8日にiPad mini6対策で767pxまでから変更 */
@media screen and (max-width : 743px) {
    body {
        font-size: 16px;
    }

    header {
        padding: 5px;
        box-sizing: border-box;
        overflow: hidden;
    }

    header,
    #wrapper {
        width: 100%;
    }

    header h1 {
        width: 70%;
        margin-top: 5px;
        margin-bottom: inherit;
        margin-right: auto;
        margin-left: auto;
        float: left;
        text-align: right;
    }

    header h1 img {
        width: 65%;
    }

    #main {
        width: 100%;
        padding: 0 3% 0 3%;
        box-sizing: border-box;
    }

    #main_visual {
        width: 100%;
        height: 290px;
        clear: both;
    }

    #main h1 {
        padding: 1px 15px 15px 10px;
        font-size: 21px;
        position: relative;
    }

    #main h1:before {
        content: "";
        position: absolute;
        margin: auto;
    }

    #main h1:before {
        width: 100%;
        height: 3.5px;
        bottom: 0px;
        left: 0px;
        border-radius: 4px;
        background: linear-gradient(to bottom, #0047b6, #003b99);
        box-shadow: 2px 2px 4px #c3c3c3,
            -2px -2px 4px #f5f5f5;
    }

    #breadcrumb {
        margin-top: 1px;
    }

    h2 {
        font-size: 19px;
        padding: 6px 14px;
        position: relative;
    }

    h2:before {
        content: "";
        position: absolute;
        margin: auto;
    }

    h2:before {
        width: 100%;
        height: 3px;
        bottom: 0px;
        left: 0px;
        border-radius: 3px;
        background: -webkit-linear-gradient(top, #FFF, #fdfdfd);
        background: linear-gradient(to bottom, #FFF, #fdfdfd);
        box-shadow: 1px 1px 2px #c3c3c3,
            -1px -1px 2px #f5f5f5;
    }

    h3 {
        font-size: 16px;
        padding: 3px 9px 3px 14px;
        position: relative;
    }

    h3:before {
        content: "";
        position: absolute;
        margin: auto;
        width: 3px;
        height: 100%;
        bottom: 0px;
        left: 0px;
        border-radius: 3px;
        background: #ffffff;
        box-shadow: 1px 1px 2px #b3b3b3,
            -1px -1px 2px #f2f2f2;
    }

    img {
        max-width: 100%;
    }

    #sidebar {
        width: 100%;
        text-align: left;
        margin: 11px auto;
        padding: 0 3%;
        box-sizing: border-box;
    }

    .iframe-wrap {
        position: relative;
        width: 100%;
        padding-top: 1120px;
        margin-left: auto;
        margin-right: auto;
    }

    .iframe-wrap iframe {
        position: absolute;
        top: 0;
        left: 0;
        height: 100%;
        width: 100%;
    }

    .menu {
        position: relative;
        display: block;
        width: 40px;
        height: 40px;
        margin-right: 5.5%;
        margin-top: 0.9%;
        font-size: 0;
        float: right;
        cursor: pointer;
    }

    .menu-line {
        display: flex;
        height: 50px;
        width: 50px;
        justify-content: center;
        align-items: center;
        position: relative;
    }

    .menu-line span:before,
    .menu-line span:after {
        content: '';
        display: block;
        width: 30px;
        height: 2px;
        margin: 10px 0px;
        background-color: #333;
        border-radius: 4px;
        transition: all 0.4s;
    }

    #menu-check:checked ~ .menu-line span::before {
        /*checkboxがチェックされたときの挙動*/
        animation: menutopline .4s forwards;
    }

    #menu-check:checked ~ .menu-line span::after {
        /*checkboxがチェックされたときの挙動*/
        animation: menuunderline .4s forwards;
    }

    @keyframes menutopline {
        0% {
            transform: translateY(0px) rotate(0);
        }

        50% {
            transform: translateY(6px) rotate(0);
        }

        100% {
            transform: translateY(6px) rotate(45deg);
        }
    }

    @keyframes menuunderline {
        0% {
            transform: translateY(0px) rotate(0);
        }

        50% {
            transform: translateY(-6px) rotate(0);
        }

        100% {
            transform: translateY(-6px) rotate(-45deg);
        }
    }

    #global_navi {
        overflow: auto;
        position: fixed;
        top: 0;
        left: 0;
        z-index: 9999;
        /*最前面に*/
        width: 77%;
        /*右側に隙間を作る（閉じるカバーを表示）*/
        max-width: 743px;
        /*最大幅（調整してください）*/
        height: 100%;
        background: #fff;
        /*背景色*/
        transition: 0.4s cubic-bezier(0.06, 0.94, 0.13, 0.96);
        /*滑らかに表示*/
        -webkit-transform: translateX(-105%);
        transform: translateX(-105%);
        /*左に隠しておく*/
        opacity: 0.98;
    }

    #global_navi ul li {
        background-color: #fff;
        font-size: 16px;
        width: 100%;
        padding: 0.5px;
        margin: 0px;
        box-sizing: border-box;
    }

    #global_navi ul li a {
        color: #000;
        margin: 0;
        padding: 9px 2px;
    }

    #global_navi ul li a:hover {
        background-color: #fff;
    }

    #global_navi ul li.current a {
        background-color: #fff;
    }

    #global_navi ul li .list1 {
        transition: 0.2s cubic-bezier(0.06, 0.94, 0.13, 0.96);
        -webkit-transform: translateX(-150%);
        transform: translateX(-150%);
        /*左に隠しておく*/
    }

    #global_navi ul li .list2 {
        transition: 0.2s cubic-bezier(0.06, 0.94, 0.13, 0.96) 0.025s;
        -webkit-transform: translateX(-150%);
        transform: translateX(-150%);
        /*左に隠しておく*/
    }

    #global_navi ul li .list3 {
        transition: 0.2s cubic-bezier(0.06, 0.94, 0.13, 0.96) 0.025s;
        -webkit-transform: translateX(-150%);
        transform: translateX(-150%);
        /*左に隠しておく*/
    }

    #global_navi ul li .list4 {
        transition: 0.2s cubic-bezier(0.06, 0.94, 0.13, 0.96) 0.025s;
        -webkit-transform: translateX(-150%);
        transform: translateX(-150%);
        /*左に隠しておく*/
    }

    #global_navi ul li .list5 {
        transition: 0.2s cubic-bezier(0.06, 0.94, 0.13, 0.96) 0.025s;
        -webkit-transform: translateX(-150%);
        transform: translateX(-150%);
        /*左に隠しておく*/
    }

    #global_navi ul li .list6 {
        transition: 0.2s cubic-bezier(0.06, 0.94, 0.13, 0.96) 0.025s;
        -webkit-transform: translateX(-150%);
        transform: translateX(-150%);
        /*左に隠しておく*/
    }

    .mobilemenutop {
        background-color: #fff !important;
        padding: 13px !important;
    }

    .mobilemenubottom {
        background-color: #fff !important;
        position: absolute;
        padding: 8px !important;
        bottom: 0;
    }

    #menu-check:checked ~ #global_navi {
        -webkit-transform: translateX(0%);
        transform: translateX(0%);
        /*中身を表示（右へスライド）*/
        box-shadow: 6px 0 25px rgba(0, 0, 0, .15);
    }

    #menu-check:checked ~ #global_navi ul li .list1 {
        -webkit-transform: translateX(0%);
        transform: translateX(0%);
        /*中身を表示（右へスライド）*/
    }

    #menu-check:checked ~ #global_navi ul li .list2 {
        -webkit-transform: translateX(0%);
        transform: translateX(0%);
        /*中身を表示（右へスライド）*/
    }

    #menu-check:checked ~ #global_navi ul li .list3 {
        -webkit-transform: translateX(0%);
        transform: translateX(0%);
        /*中身を表示（右へスライド）*/
    }

    #menu-check:checked ~ #global_navi ul li .list4 {
        -webkit-transform: translateX(0%);
        transform: translateX(0%);
        /*中身を表示（右へスライド）*/
    }

    #menu-check:checked ~ #global_navi ul li .list5 {
        -webkit-transform: translateX(0%);
        transform: translateX(0%);
        /*中身を表示（右へスライド）*/
    }

    #menu-check:checked ~ #global_navi ul li .list6 {
        -webkit-transform: translateX(0%);
        transform: translateX(0%);
        /*中身を表示（右へスライド）*/
    }

    #menu-background {
        background-color: #666;
        /*黒背景*/
        display: block;
        height: 100%;
        position: fixed;
        right: 0;
        top: 0;
        opacity: 0;
        width: 100%;
        -webkit-transition: all 0.001s linear 0.02s;
        /*0.3s はアニメーションにかかる時間*/
        transition: all 0.001s linear 0s;
        /*0.3s はアニメーションにかかる時間*/
        z-index: -1;
    }

    #menu-check:checked ~ #menu-background {
        opacity: 0.3;
        z-index: 1;
    }
}

@media screen and (min-width : 743px) {
    #menu-check .menu-line {
        display: none;
    }

    .mobilemenutop {
        display: none;
    }

    .mobilemenubottom {
        display: none;
    }
}

/* 2022/10/23にiPhone 14 Pro Max対策でmin-width:430pxからテキトーに変更 */
@media screen and (min-width:450px) and (max-width:1024px) {

    body,
    html {
        font-size: 18px;
        min-width: 980px;
    }
}