@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,100..900;1,9..144,100..900&family=Plus+Jakarta+Sans:ital,wght@0,200..800;1,200..800&family=Zen+Dots&family=Zen+Kaku+Gothic+New:wght@300;400;500;700;900&family=Zen+Maru+Gothic:wght@300;400;500;700;900&display=swap');

:root {
    --color-primary: #00BE8A;
    --color-secondary: #FFEC5F;
    --light--background: #F3F3F3;
    --font-color: #432C24;
    --color-bg: #ffffff;
    color-scheme: only light;
    --font-zen: 'Zen Dots', sans-serif;
    --font-maru: 'Zen Maru Gothic', sans-serif;
    --font-fra: 'Fraunces', serif;
    --font-jak: 'Plus Jakarta Sans', sans-serif;
    --font-kaku: 'Zen Kaku Gothic New', sans-serif;
    --font-size1: 1px;
    --font-size2: 2px;
    --font-size3: 3px;
    --font-size4: 4px;
    --font-size5: 5px;
    --font-size6: 6px;
    --font-size7: 7px;
    --font-size8: 8px;
    --font-size9: 9px;
    --font-size10: 10px;
    --font-size11: 11px;
    --font-size12: 12px;
    --font-size13: max(1.3rem, 12px);
    --font-size14: max(1.4rem, 12px);
    --font-size15: max(1.5rem, 13px);
    --font-size16: max(1.6rem, 14px);
    --font-size17: max(1.7rem, 15px);
    --font-size18: max(1.8rem, 16px);
    --font-size19: max(1.9rem, 17px);
    --font-size20: max(2.0rem, 18px);
    --font-size21: max(2.1rem, 18px);
    --font-size22: max(2.2rem, 18px);
    --font-size23: max(2.3rem, 20px);
    --font-size24: max(2.4rem, 20px);
    --font-size25: max(2.5rem, 21px);
    --font-size26: max(2.6rem, 22px);
    --font-size27: max(2.7rem, 22px);
    --font-size28: max(2.8rem, 24px);
    --font-size29: max(2.9rem, 25px);
    --font-size30: max(3.0rem, 26px);
    --font-size31: max(3.1rem, 26px);
    --font-size32: max(3.2rem, 27px);
    --font-size33: max(3.3rem, 28px);
    --font-size34: max(3.4rem, 29px);
    --font-size35: max(3.5rem, 30px);
    --font-size36: max(3.6rem, 30px);
    --font-size37: max(3.7rem, 31px);
    --font-size38: max(3.8rem, 32px);
    --font-size39: max(3.9rem, 32px);
    --font-size40: 4.0rem;
    --font-size41: 4.1rem;
    --font-size42: 4.2rem;
    --font-size43: 4.3rem;
    --font-size44: 4.4rem;
    --font-size45: 4.5rem;
    --font-size46: 4.6rem;
    --font-size47: 4.7rem;
    --font-size48: 4.8rem;
    --font-size49: 4.9rem;
    --font-size50: 5.0rem;
    --font-size51: 5.1rem;
    --font-size52: 5.2rem;
    --font-size53: 5.3rem;
    --font-size54: 5.4rem;
    --font-size55: 5.5rem;
    --font-size56: 5.6rem;
    --font-size57: 5.7rem;
    --font-size58: 5.8rem;
    --font-size59: 5.9rem;
    --font-size60: 6.0rem;
    --font-size61: 6.1rem;
    --font-size62: 6.2rem;
    --font-size63: 6.3rem;
    --font-size64: 6.4rem;
    --font-size65: 6.5rem;
    --font-size66: 6.6rem;
    --font-size67: 6.7rem;
    --font-size68: 6.8rem;
    --font-size69: 6.9rem;
    --font-size70: 7.0rem;
    --font-size71: 7.1rem;
    --font-size72: 7.2rem;
    --font-size73: 7.3rem;
    --font-size74: 7.4rem;
    --font-size75: 7.5rem;
    --font-size76: 7.6rem;
    --font-size77: 7.7rem;
    --font-size78: 7.8rem;
    --font-size79: 7.9rem;
    --font-size80: 8.0rem;
    --font-size81: 8.1rem;
    --font-size82: 8.2rem;
    --font-size83: 8.3rem;
    --font-size84: 8.4rem;
    --font-size85: 8.5rem;
    --font-size86: 8.6rem;
    --font-size87: 8.7rem;
    --font-size88: 8.8rem;
    --font-size89: 8.9rem;
    --font-size90: 9.0rem;
    --font-size91: 9.1rem;
    --font-size92: 9.2rem;
    --font-size93: 9.3rem;
    --font-size94: 9.4rem;
    --font-size95: 9.5rem;
    --font-size96: 9.6rem;
    --font-size97: 9.7rem;
    --font-size98: 9.8rem;
    --font-size99: 9.9rem;
    --font-size100: 10.0rem;
}

html {
    font-size: 62.5%;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

body {
    overflow-x: hidden;
    margin: 0;
    padding: 0;
    font-family: var(--font-maru);
    color: var(--font-color);
    background: url(../images/icons/Mathematics.svg);
    background-size: contain;
    height: auto;
}

::-webkit-scrollbar {
    background: #F2F2F2;
    width: 0.45rem;
}
::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: 6px;
}

/* LOADER */
.content {
    display: none;
}
.loader {
    height: 100vh;
    width: 100vw;
    position: fixed;
    inset: 0;
    background: #ffffff;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}
.loader__gif {
    width: 160px;
    height: auto;
}

/* SWITCH */
.switch__sticky {
    position: fixed;
    bottom: 20px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    z-index: 3;
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
    transition: opacity 0.5s ease;
}
.switch__sticky.is-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}
.switch {
    cursor: pointer;
    display: flex;
    width: 75%;
    margin: 0;
    padding: 0;
    color: var(--color-primary);
    background-color: #fff;
    box-shadow: 0 1px 4px 0 rgba(0, 0, 0, 0.25);
    z-index: 3;
    border-radius: 30px;
}
.switch li {
    flex: 1;
    min-height: 52px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: clamp(16px, 2vw, 30px);
    font-weight: bold;
    line-height: clamp(52px, 5.5vw, 80px);
    list-style: none;
    text-align: center;
}
.switch li.active {
    background-color: var(--color-primary);
    border: 1px solid #fff;
    color: #FFFFFF;
    border-radius: 30px;
}

/* CONTENTS */
.img-fluid {
    width: 571px;
    height: auto;
}
.contents {
    display: none;
}
.quiz_title {
    font-weight: 450;
}
.quiz {
    font-size: 16px!important;
    text-align: right;
}
.quiz__bottom {
    font-size: 16px!important;
    text-align: right;
}
.contents.active {
    display: block;
    padding: 0 8%;
}
.title {
    margin: 0px auto 40px;
}
.contents h3 {
    text-align: center;
    font-size: 50px;
    font-weight: bold;
    letter-spacing: -0.1em;
}
h3 .subtitle {
    display: block;
    font-size: 20px;
    font-weight: 900;
    color: var(--color-primary);
    letter-spacing: 0em;
}
.competitions h3 {
    letter-spacing: 0em;
}
.section-description {
    font-size: 24px;
    font-weight: medium;
    text-align: center;
    margin-top: 12px;
}
ol {
    padding: 0;
}
.item {
    display: flex;
    padding: 0 30px;
    align-items: center;
    justify-content: space-between;
    border-bottom: 0.2px solid #000;
}
.item__img {
    max-width: 100%;
    height: auto;
    padding-top: 40px;
    padding-bottom: 18px;
    position: relative;
    display: inline-block;
}
.item__img-sub{
    padding: 40px;
}
.item__text {
    display: flex;
    flex: 1;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    font-size: 24px;
}
.item__text--inner {
    max-width: 480px;
    width: 100%;
}
.item__text h4 {
    font-size: 36px;
    margin: 0 0 16px;
}
.item__text_small {
    font-size: 32px !important;
    margin-top: 4rem !important;
}
.item__text_time{
    margin-top: 2.2rem;
}
.item__text_time span{
    font-weight: 450;
}
.item__text_small_time{
    font-weight: 450;
}
.item__text__small{
   font-size: 26px;
}
.item-sm{
    font-size: 20px;
    display: block;
    text-align: right;
}
.item__text h4 .name {
    font-size: 28px;
}
.item__text p {
    font-size: 20px;
}
.item:nth-child(even) {
    flex-direction: row-reverse;
}
.item:nth-child(4) .item__img {
    padding-top: 40px;
}
.item:nth-child(7) {
    padding-left: 0;
}
.item:nth-child(7) .item__img {
    padding-top: 40px;
    padding-bottom: 40px;
}
.item:nth-child(7) .item__text--inner {
    max-width: 450px;
    width: 100%;
}
.item:last-child {
    border: none;
}

@media (600px <= width < 1200px) {
    .contents h3 {
        font-size: 42px;
    }
    h3 .subtitle {
        font-size: 16px;
    }
    .section-description {
        font-size: 24px;
    }
    .item {
        display: block;
        padding: 0 0 40px;
        text-align: center;
    }
    .item__text h4 {
        font-size: 28px;
    }
    .item__text h4 .name {
        font-size: 24px;
    }
    .item__text p {
        font-size: 20px;
    }
    .pc-br {
        display: none;
    }
}
@media (width < 600px) {
   
    .switch {
        width: 100%;
        margin-top: 300px;
    }
    .switch li {
        font-size: clamp(12px, 2vw, 30px);
        max-height: 0.2dvh;
        height: auto;
        line-height: normal;
    }
    .contents h3 {
        font-size: 32px;
    }
    h3 .subtitle {
        font-size: 16px;
    }
    .section-description {
        font-size: 16px;
    }
    .item {
        display: block;
        padding: 0 0 40px;
        text-align: center;
    }
    .item__text h4 {
        font-size: 24px;
    }
    .item__text h4 .name {
        font-size: 20px;
    }
    .item__text p {
        font-size: 16px;
    }
}

/* HEADER */
header {
    position: relative;
    z-index: 99;
}
header .nav__logo-sp {
    display: none;
}
header .nav__logo-pc{
    display: block;
}
html.menu-open,
body.menu-open {
    overflow: hidden;
}
header .nav__menu-inner {
    width: 100%;
    height: 100vh;
    padding: 120px 70px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #F5F5F5;
    position: fixed;
    top: 0;
    left: 0;
    transform: translateY(-100%);
    opacity: 0;
    transition: transform 0.7s ease, opacity 0.7s ease;
    pointer-events: none;
    z-index: 99;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
}
header .nav__menu-inner::-webkit-scrollbar {
    display: none;
}
header .nav__menu.is-open .nav__menu-inner {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}
header .nav__toggle button {
    z-index: 100;
    position: fixed;
    top: 5%;
    right: 3%;
    background: var(--color-bg);
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}
header .nav__hamburger-icon {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 6px;
}
header .nav__hamburger-bar {
    display: block;
    width: 40px;
    height: 6px;
    border-radius: 10px;
    background-color: var(--color-primary);
    transition: transform 0.4s ease;
}
header .nav__menu.is-open .nav__hamburger-bar--1 {
    transform: translateY(6px) rotate(45deg);
}
header .nav__menu.is-open .nav__hamburger-bar--2 {
    transform: translateY(-6px) rotate(-45deg);
}
header .nav__menu-content {
    padding-left: 110px;
}
header .nav__group-title {
    font-size: var(--font-size18);
    color: var(--font-color);
    opacity: 0.8;
    margin-bottom: 24px;
    font-weight: 200;
    font-family: var(--font-maru);
    pointer-events: none;
}
header .nav__list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    font-family: var(--font-maru);
    margin-top: 20px;
}
header .nav__link {
    display: inline-block;
    font-size: var(--font-size16);
    text-decoration: none;
    font-weight: 450;
    color: var(--font-color);
    margin-top: 20px;
}

/* MAIN VISUAL */
.mv-container {
    height: 100vh;
    position: relative;
    padding-bottom: 700px;
}
.mv {
    position: relative;
    background-image: url("../images/kv/competition/compe-kv.png");
    background-size: cover;
    background-position: center;
    max-width: 100%;
    height: 95vh;
    overflow: visible;
}
.mv-logo {
    position: relative;
    background-color: var(--color-bg);
    background-image: url("../images/icons/Mathematics.svg");
    width: fit-content;
    padding: 20px 40px;
    border-radius: 0 30px 30px 0;
    top: 4%;
}
.mv .mv-logo img {
    width: 400px;
    height: auto;
}
.mv-logo-sp {
    display: none;
}
.mv-bottom-text {
    position: absolute;
    right: 0;
    bottom: -40px;
    background: url("../images/icons/Mathematics.svg"), var(--color-bg);
    padding: 20px 60px;
    z-index: 1;
}
.mv-bottom-text h2 {
    color: var(--color-primary);
    font-size: var(--font-size30);
    font-weight: 600;
}
.mv-bottom-text p {
    font-size: var(--font-size16);
    font-weight: 450;
    line-height: 1.8;
    color: var(--font-color);
}

/* FOOTER */
footer {
    position: relative;
    background-color: var(--color-primary);
    padding: 80px 60px 0 60px;
}
.footer__logos {
    display: flex;
    align-items: center;
    gap: 16px;
}
.footer__logo {
    width: 92px;
    height: 68px;
}
.footer__nav-label {
    font-size: var(--font-size18);
    color: #ffffff;
    margin-bottom: 24px;
    font-weight: 200;
    font-family: var(--font-maru);
}
.footer__nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 15px;
    font-family: var(--font-maru);
}
.footer__nav-link {
    font-size: var(--font-size16);
    color: var(--color-bg);
    text-decoration: none;
    font-weight: 450;
}
.footer__nav-link:hover {
    transition: 0.5s ease;
    opacity: 0.8;
}
.footer__bottom {
    margin-top: 80px;
    border-top: 1px solid rgba(255, 255, 255, 0.3);
    padding: 40px 0;
}
.footer__bottom .footer__bottom-inner {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size16);
    color: var(--color-bg);
    margin: 0;
    font-family: var(--font-maru);
}
.footer__bottom .footer__bottom-inner a {
    color: var(--color-bg);
    transition: 0.5s ease;
}
.footer__bottom .footer__bottom-inner a:hover {
    opacity: 0.8;
}

/*after the festival is finished*/
.item__img_one_crown img{
    width: 105px;
    position: absolute;
    top: 0px;
    left: -20px;
}
.item__img_two_crown{
    display: flex;
}
.item__img_two_crown img{
    width: 105px;
    position: absolute;
    top: 0;
    left: -20px;
}
.item__img_two_crown img:last-child{
    left: 55px;
}

/* MOBILE */
@media screen and (max-width: 998px) {
     h3 {
        margin-top: 100px;
    }
    header .nav__logo-pc {
        display: none;
    }
    header .nav__logo-sp {
        display: block;
    }
    header .nav__menu-inner {
        width: 100%;
        padding: 50px 20px;
        background-color: #F5F5F5;
        display: block;
    }
    header .nav__toggle button {
        position: fixed;
        top: 4%;
        right: 3%;
        background: var(--color-bg);
        width: 50px;
        height: 50px;
    }
    header .nav__hamburger-icon {
        gap: 4px;
    }
    header .nav__hamburger-bar {
        display: block;
        width: 25px;
        height: 4px;
        border-radius: 10px;
    }
    header .nav__menu.is-open .nav__hamburger-bar--1 {
        transform: translateY(4px) rotate(45deg);
    }
    header .nav__menu.is-open .nav__hamburger-bar--2 {
        transform: translateY(-4px) rotate(-45deg);
    }
    header .nav__menu-content {
        padding-left: 0;
    }
    header .nav__group-title {
        margin-top: 40px;
    }
    header .nav__list {
        margin-top: 0;
    }
    header .nav__item:first-child .nav__link {
        margin-top: 18px;
    }
    header .nav__link {
        margin-top: 14px;
    }
    header .nav__groups {
        padding: 0 40px;
    }
    .mv-container {
        height: 65vh;
        padding-bottom: 400px;
    }
    .mv-bottom-text br {
        display: none;
    }
    .mv {
        height: 45vh;
    }
    .mv-logo {
        display: none;
    }
    .mv-logo-sp {
        display: block;
        position: absolute;
        top: 20px;
        background: url("../images/icons/Mathematics.svg") var(--color-bg);
        padding: 15px 25px;
        border-radius: 0 20px 20px 0;
    }
    .mv-bottom-text {
        padding: 10px;
        bottom: -220px;
        right: 0;
        max-width: 900px;
        background: none;
    }
    .mv-bottom-text h2 {
        font-size: var(--font-size30);
        font-weight: 600;
    }
    .mv-bottom-text p {
        font-size: var(--font-size18);
        font-weight: 450;
    }
    .title{
        margin: 0px;
    }

    .item__text_time{
        margin-top: 2.2rem;
    }
    .item__text_time span{
        font-weight: 420;
    }
    .item__text_small_time{
        font-weight: 420;
    }
    .item__text__small{
    font-size: 20px;
  
    }
    .item-sm{
        font-size: 16px;
        
    }
    footer {
        background-color: var(--color-primary);
        padding: 80px 20px 0 20px;
    }
    footer .footer__nav-label {
        font-size: var(--font-size18);
        color: #ffffff;
        margin-top: 45px;
        margin-bottom: 24px;
        font-weight: 300;
        font-family: var(--font-maru);
    }
    footer .footer__bottom .footer__inner {
        display: block;
    }
    footer .footer__nav-label {
        margin-top: 0;
    }
    footer .footer__group {
        gap: 40px;
        display: flex;
    }
    footer .footer__group:first-child {
        margin-top: 24px;
    }
    footer .footer__group:not(:first-child) {
        margin-top: 40px;
    }
}