@charset "utf-8";
html {
  font-size: 62.5%;
  overflow-x: hidden;
  scroll-behavior: smooth;
  scroll-padding-top: 70px; 
}
body {
  font-family: "ヒラギノ角ゴ ProN", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "メイリオ", Meiryo, "游ゴシック Medium", "游ゴシック体", "Yu Gothic Medium", YuGothic, "ＭＳ Ｐゴシック", "MS PGothic", sans-serif;
  font-size: 1.8em;
  font-weight: 500;
  line-height: 1.9;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
}

a {
  color: #369;
}
ul li {
  margin-left: 2.5rem;
}
.small, small {
  font-size: 80%;
  line-height: 1.5;
}

.break-word {
  overflow-wrap: break-word;
}
.hover:hover {
  opacity: .8!important;
  transition: .3s;  
}
.font-bold {
  font-weight: 700;
}
.font-red {
  color: #f60;
  font-weight: 700;
}
.font-white {
  color: #fff;
}

.inner-white {
  background-color: #fff;
  padding: 4rem 4rem 3rem;
  color: #000;
}
.inner-white p a,
.inner-white li a {
  color: #369!important;
}

.fade-in-up {
  animation: fadeInUp .8s ease-out forwards;
  opacity: 0; 
}
@keyframes fadeInUp {
  0% {
    opacity: 0;
    transform: translateY(30px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 577px) {
  body {
    font-size: 1.4em;
  }
  .inner-white {
    padding: 2rem 1.5rem;
  }
}

.main {
  background-color: #02132d;
  color: #fff; 
}

/* ボタン */

.btn-app {
  background: linear-gradient(180deg, #f47607, #f30);
  box-shadow: 3px 3px 10px 0px rgba(0, 0, 0, 0.3);
}
.btn-tt {
  background: linear-gradient(180deg, #4d7597, #214667);
  box-shadow: 3px 3px 10px 0px rgba(0, 0, 0, 0.3);
}
.btn-app:hover,
.btn-tt:hover {
  filter: brightness(1.2);
  transform: translateY(3px);
  transition: .2s; 
}
a.btn-app,
a.btn-tt {
  color: #fff;
}

.btn-width {
  max-width: 440px;
  position: relative;
  display: block;
  padding: 2.8rem 1rem; 
  border-radius: 100px;
  margin: auto;
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
  font-size: 2.2rem;
  font-weight: 600;
  transition: all 0.2s;
}

.arrow-r::after {
  content: '';
  border: 0;
  border-top: solid 3px #fff;
  border-right: solid 3px #fff;
  display: inline-block;
  width: 10px;
  height: 10px;
  position: absolute;
  top: 50%;
  right: 22px;
  transform: translateY(-45%) rotate(45deg);
}
.btn-txt {
  font-size: 1.2rem;
}

@media (max-width: 577px) {
  .btn-width {
    max-width: 85%;
    padding: 1.8rem 1rem; 
    font-size: 1.7rem;
  }
}

@media (max-width: 480px) {
  .btn-width {
    max-width: 90%;
  }
  .btn-txt {
    font-size: 1rem;
  }
}

/* 見出し */

.headline-en {
  margin-bottom: 4rem;
  color: #fff;
  font-size: 1.5rem;
  text-align: center;
  line-height: 1.4;
}
.headline-en span {
  font-family: "Noto Serif JP", serif;
  font-size: 6rem;
  font-weight: 800;
  color: #f90;
}

.headline-small {
  margin-bottom: 2rem;
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.6;
  text-align: center;
}

.headline-border {
  margin-bottom: 3rem;
  padding: .7rem 0 1rem;
  border-bottom: 1px solid #000;
  border-top: 1px solid #000;
  color: #000;
  font-weight: 700;
  font-size: 2.2rem;
  text-align: center;
  line-height: 1.5;
}

@media (max-width: 768px) {
  .headline-en {
    font-size: 1.4rem;
  }
  .headline-en span {
    font-size: 6rem;
  }
  .headline-small {
    font-size: 2.6rem;
  }
}

@media (max-width: 577px) {
  .headline-en {
    font-size: 1.2rem;
    margin-bottom: 3rem;
  }
  .headline-en span {
    font-size: 4rem;
  }
  .headline-small {
    font-size: 2rem;
  }
  .headline-border {
    font-size: 1.7rem;
    margin-bottom: 1.5rem;
  }
}

/*--------------------
      トップページ
--------------------*/

/* トップ */

#title {
  padding: 4rem 2rem 0;
  background-image: url(../images/back.jpg?v=1788746773) ;
  background-position: bottom;
  background-repeat: no-repeat;
  background-size: cover;
}

@media (max-width: 768px) {
  #title {
    background-position: top;
    background-size: 170%;
  }
}

.container.title-width {
  max-width: 1250px;
}
.lead {
  margin-top: 4rem;
  font-size: 2rem;
}

#point {
  padding: 4rem 0 6rem;
  font-size: 2rem;
  line-height: 1.7;
}
.point-box {
  padding: 2rem 3.5rem 3.5rem;
  background-color: #fff;
  border-radius: 1.2rem;
  color: #000;
  font-weight: 700;
}
.point-box h2 {
  margin-bottom: 1rem;
  font-size: 3.6rem;
  font-family: "Noto Serif JP", serif;
  font-size: 700;
  color: #062d4c;
  text-align: center;
}
.point-box span {
  color: #f60;
}

@media (max-width: 577px) {
  #title {
    padding: 3rem 0 2rem;
  }
  #title .photo {
    width: 80%;
    margin: auto;
  }
  .lead {
    margin-top: 3rem;
    font-size: 1.4rem;
  }
  #point {
    padding: 1rem 0 4rem;
    font-size: 1.5rem;
  }
  .point-box {
    padding: 1.5rem 1rem 2rem;
    border-radius: 1rem;
  }
  .point-box h2 {
    font-size: 2.4rem;
  }
}

/* お知らせ */

#top_news {
  padding: 4.5rem 0 6rem;
  background-color: #062d4c;
}

#top_news .news {
  max-width: 950px;
  margin: 0 auto 4rem;
}

#top_news .news p {
  padding: 2rem 0;
  border-bottom: 1px solid #999;
}

#top_news p:first-child {
  padding-top: 0;
}

#top_news p:last-child {
  border-bottom: none;
}

@media (max-width: 577px) {
  #top_news {
    padding: 3rem 0 4rem;
  }
  #top_news p:last-child {
    padding-bottom: 0;
  }
}

/* タイムテーブル */

#top_timetable {
  padding: 4.5rem 0 6rem;
  background-image: url(../images/back.jpg?v=1788746773), url(../images/back2.jpg?v=1788746773);
  background-position: top, bottom;
  background-repeat: no-repeat, no-repeat;
  background-size: contain, contain;
}

.tt-box {
  margin-bottom: 1rem;
  box-shadow: 3px 3px 15px 0px rgba(0, 0, 0, 0.5);
}
.tt-time {
  padding: .7rem;
  background-color: #f90;
  border-radius: 12px 12px 0 0;
  color: #02132d;
  font-size: 110%;
  font-weight: 700;
  text-align: center;
}
.tt-contents {
  padding: 2rem 3rem;
  background-color: #fff;
  border-radius: 0 0 12px 12px;
  color: #000;
}
.tt-contents.closed {
  background-color: #ddd;
  color: #666;
  text-align: center;
  vertical-align: middle;
}

#top_timetable .session_no {
  padding: 2px 10px;
  background-color: #000;
  color: #fff;
}

#top_timetable p a {
  color: #369;
  font-size: 2.4rem;
  line-height: 1.7;
  font-weight: 700;
}

#top_timetable .badge {
  padding: 3px 6px;
  border-radius: 3px;
  font-size: 14px;
  font-weight: 600;
  color: #000;
}
#top_timetable .badge.badge-warning,
#top_timetable .badge.badge-danger {
  margin-right: 0!important;
  padding: 1px 5px;
  border: 1px solid #f33;
  border-radius: 0;
  background-color: #fff!important;
  color: #f33;
  font-size: 14px;
  font-weight: 700;
}

#top_timetable .name {
  margin-left: -12px;
  line-height: 1.6;
}

@media (max-width: 768px) {
  #top_timetable {
    background-image: none;
  }
  #top_timetable .name {
    font-size: 90%;
  }
}

@media (max-width: 577px) {
  #top_timetable {
    padding: 3rem 0 4rem;
  }
  .tt-box {
    margin-bottom: 1rem;
  }
  .tt-time {
    border-radius: 10px 10px 0 0;
  }
  .tt-contents {
    padding: 2rem 1.5rem 1.5rem;
    border-radius: 0 0 10px 10px;
  }

  #top_timetable p a {
    font-size: 1.5rem;
  }
  #top_timetable .badge {
    font-size: 12px;
  }
  #top_timetable .badge.badge-warning,
  #top_timetable .badge.badge-danger {
    font-size: 12px;
  }
  #top_timetable .session_no {
    font-size: 15px;
  }
}

/* スポンサー */

#top_sponsor {
  padding: 5rem 0 6rem;
  background-color: #062d4c;
}

#top_sponsor h3 {
  margin-bottom: 2rem;
  padding: .2rem 1rem;
  background-color: #ebebeb;
  text-align: center;
}

.diamond {
  background: linear-gradient(135deg, #ffcce6 0%, #fff5ba 12%, #fff 25%, #d4f0d4 37%, #ecfcfe 50%, #cce6ff 62%, #fff 75%, #e6ccff 87%, #ffccf2 100%);
}
.platinum {
  background: linear-gradient(135deg, #757575 0%, #fff 50%, #bdbdbd 100%);
}
.gold {
  background: linear-gradient(135deg, #d4c4a8 0%, #fff 50%, #bca578 100%);
}
.silver {
  background: linear-gradient(135deg, #a6a6a6 0%, #fff 50%, #999 100%);
}

#top_sponsor p {
  text-align: center;
}

@media (max-width: 577px) {
  #top_sponsor {
    padding: 3rem 0 4rem;
  }
  #top_sponsor p {
    font-size: 1.4rem;
    text-align: left;
  }
  #top_sponsor p br {
    display: none;
  } 
}

/* 開催概要 */

#top_overview {
  padding: 5rem 0;
  background-image: url(../images/back.jpg?v=1788746773) ;
  background-position: bottom;
  background-repeat: no-repeat;
  background-size: cover;
}
@media (max-width: 768px) {
  #top_overview {
    background-position: top;
    background-size: 170%;
  }
}

.box {
  max-width: 950px;
  margin: auto;
  padding: 3.5rem 4rem;
  border: 2px solid #fff;
  border-radius: 13px;
  box-shadow: 0px 5px 20px 0px rgba(0, 0, 0, 0.3);
  background-color: rgba(2, 19, 45, .6);
  backdrop-filter: blur(10px);
  color: #fff;
}
.box a {
  color: #fff !important;
}

#top_overview table {
  line-height: 1.7;
  font-size: 1.8rem;
}
#top_overview tr {
  border-bottom: 1px solid #999;
}
#top_overview tr:last-child {
  border-bottom: none;
}
#top_overview th,
#top_overview td {
  padding: 2rem 0;
}
#top_overview th {
  width: 120px;
}
#top_overview ul {
  font-size: 1.5rem;
}

#top_overview p {
  margin-bottom: 1.5rem;
}
#rules p {
  font-size: 1.4rem;
  line-height: 1.7;
}

@media (max-width: 991px) {
  #top_overview table {
    width: 100%;
  } 
  #top_overview th {
    width: 75px;
  }
}
@media (max-width: 577px) {
  #top_overview {
    padding: 3rem 0rem;
  }
  .box {
    padding: 1rem 1.5rem;
  }
  #top_overview table {
    font-size: 1.4rem;
  }
  #top_overview th,
  #top_overview td {
    padding: 1.5rem 0;
  }
  #top_overview ul {
    font-size: 1.2rem;
  }
}

/* 行動規範 */

#top_check {
  padding: 0 0 6rem;
}

.accordion-item {
  background-color: #fff;
  margin-bottom: .8rem;
  overflow: hidden;
  border-radius: 4px;
  border: 1px solid #ddd;
  color: #000;
}
.accordion-header {
  width: 100%;
  padding: .6rem 2rem;
  background-color: #fff;
  border: none;
  font-weight: bold;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.2s ease;
}
.accordion-icon {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-right: 2px solid #666;
  border-bottom: 2px solid #666;
  transform: rotate(45deg);
  transition: transform 0.3s ease;
  margin-top: -4px; 
}
.accordion-item.is-open .accordion-icon {
  transform: rotate(-135deg);
  margin-top: 2px;
}
.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  background-color: #fafafa;
}
.accordion-text {
  padding: 1.5rem 2rem;
  border-top: 1px solid #eee;
  line-height: 1.7;
  margin: 0;
  font-size: 1.6rem;
}

@media (max-width: 577px) {
  #top_check {
    padding: 0 0 4rem;
  }
  .accordion-header {
    padding: .6rem 1.5rem;
    font-size: 1.4rem;
  }
  .accordion-text {
    padding: 1rem 1.5rem;
    font-size: 1.3rem;
  }
}

/*--------------------
      共通フッター
--------------------*/

footer {
  padding: 3rem 0;
  background-color: #000;
  color: #fff;
  font-size: 1.4rem;
  line-height: 1.8;
  text-align: center;
}
footer a {
  color: #fff;
}
.sns {
  text-align: center;
}
.sns img {
  display: inline-block;
}
.sns img.x {
  width: 35px;

}
.sns img.facebook {
  width: 40px;
}

@media (max-width: 577px) {
  footer {
    font-size: 1rem;
  }
}

/* トップへ戻るボタン */

.scroll-to-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  background-color: #666;
  color: #fff;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  font-size: 1.5em;
  opacity: 0;
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: none;
  z-index: 1000;
}

.scroll-to-top.is-visible {
  opacity: .8;
  pointer-events: auto;
  transform: translateY(0);
}