@charset "utf-8";
html {
  font-size: 62.5%;
  overflow-x: hidden;
  scroll-behavior: smooth;
  scroll-padding-top: 70px; 
}
body {
  color: #000;
  font-family: 'Noto Sans JP',"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%;
  overflow-x: hidden;
}

a {
  color: #369;
}

.break-word {
  overflow-wrap: break-word;
}

.hover:hover {
  opacity: .8!important;
  transition: .3s;  
}
.font-bold {
  font-weight: 700;
}
.font-red {
  color: #ff4800;
  font-weight: 700;
}
.font-white {
  color: #fff;
}
.small, small {
  font-size: 80%;
  line-height: 1.5;
}
ul li {
  margin-left: 2.5rem;
}

@media (max-width: 577px) {
  body {
    font-size: 1.4em;
  }
}

.box {
  max-width: 950px;
  margin: auto;
  padding: 3.5rem 4rem;
  border: 1px solid #fff;
  border-radius: 15px;
  box-shadow: 0px 5px 20px 0px rgba(0, 0, 0, 0.1);
  background-color: rgba(255, 255, 255, .7);
  backdrop-filter: blur(8px);
}

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

@media (max-width: 577px) {
  .box {
    padding: 1.5rem;
    border-radius: 10px;
  }
  .inner-white {
    padding: 1.5rem;
  }
}

.bg {
  background-color: #f3f3f3;
  background-image: url(../images/back.png?a=&v=1781497845) ;
  background-position: center -550px;
  background-repeat: no-repeat;
  background-attachment: fixed;
}
@media (max-width: 577px) {
  .bg {
    background-size: 220%;
    background-position: center -35px;
  }
}

/* 見出し */

.headline-en {
  font-size: 1.5rem;
  margin-bottom: 4rem;
  text-align: center;
  line-height: 1.4;
}
.headline-en span {
  color: #010060;
  font-size: 6rem;
  font-weight: 800;
  background: linear-gradient(180deg, #162871, #384786);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.headline-border {
  color: #000;
  font-weight: 700;
  font-size: 2.2rem;
  text-align: center;
  margin-bottom: 3rem;
  padding: .7rem 0 1rem;
  border-bottom: 1px solid #000;
  border-top: 1px solid #000;
  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: 4.2rem;
  }
  .headline-small {
    font-size: 2rem;
  }
  .headline-border {
    font-size: 1.7rem;
    margin-bottom: 1.5rem;
  }
}

/* ボタン */

.btn-app {
  background: linear-gradient(180deg, #ff4800, #ff6325);
  box-shadow: 5px 5px 10px 0px rgba(0, 0, 0, 0.1);
}
.btn-tt {
  background: linear-gradient(180deg, #162871, #384786);
  box-shadow: 5px 5px 10px 0px rgba(0, 0, 0, 0.1);
}
.btn-app:hover,
.btn-tt:hover {
  filter: brightness(1.2);
  box-shadow: none;
  transform: translateY(3px);
  transition: .2s; 
}
a.btn-app,
a.btn-tt,
a.btn-menu {
  color: #fff;
}

.btn-width {
  max-width: 450px;
  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: 2rem;
  font-weight: 600;
  transition: all 0.2s;
}

.arrow-d::after {
  content: '';
  border: 0;
  border-top: solid 3px #fff;
  border-right: solid 3px #fff;
  display: inline-block;
  width: 7px;
  height: 7px;
  position: absolute;
  top: 47%;
  right: 24px;
  transform: translateY(-45%) rotate(135deg);
}
.arrow-r::after {
  content: '';
  border: 0;
  border-top: solid 3px #fff;
  border-right: solid 3px #fff;
  display: inline-block;
  width: 6px;
  height: 7px;
  position: absolute;
  top: 50%;
  right: 27px;
  transform: translateY(-45%) rotate(45deg);
}
.btn-txt {
  font-size: 1.2rem;
}

.btn-menu {
  position: relative;
  display: block;
  margin: 0 auto;
  padding: 1.4rem 1rem; 
  border-radius: 100px;
  color: #fff!important;
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.5rem;
}

@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: 92%;
  }
  .btn-txt {
    font-size: 1rem;
  }
}

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

/* トップ */

#title {
  padding: 6rem 0 0;
}

.title-logo {
  margin-bottom: 3rem;
}
.title-place {
  font-size: 2.6rem;
  font-weight: 700;
  margin-bottom: 4rem;
  line-height: 1.5;
  text-align: center;
}

#title .catch {
  text-align: center;
  line-height: 1;
  font-weight: 900;
  color: rgba(255, 255, 255, .7);
  font-size: 11rem;
  margin-bottom: -2.5rem;
}

.lead {
  text-align: center;
  margin-bottom: 4rem;
}

@media (max-width: 991px) {
  #title .catch {
    font-size: 8rem;
  }
  .lead {
    text-align: left;
  }
  .lead br {
    display: none;
  }
}

@media (max-width: 577px) {
  #title {
    padding: 4rem 0 2rem;
  }
  .title-logo {
    width: 95%;
    margin-bottom: 1.5rem;
  }
  .title-place {
    margin-bottom: 3rem;
    font-size: 1.5rem;
  }
  #title .catch {
    margin-bottom: -1.5rem;
    font-size: 5.5rem;
  }
  .lead {
    font-size: 1.4rem;
    margin-bottom: 3rem;
  }
}

/* 注目セッション */

.slick-track {
  display: flex !important;
  align-items: stretch !important;
}
.slick-slide {
  height: auto !important;
  display: flex !important;
}
.slick-slide > div {
  width: 100%;
  display: flex !important;
}

.slick-prev, .slick-next {
  width: 40px !important;
  height: 40px !important;
  background: transparent!important;
  border-radius: 50% !important;
  z-index: 10;
}
.slick-prev:hover, .slick-next:hover,
.slick-prev:focus, .slick-next:focus {
  opacity: .7;
}

.slick-prev {
  left: -30px !important;
}
.slick-next {
  right: -30px !important;
}
.slick-prev:before, .slick-next:before {
  font-size: 40px !important;
  color: #333 !important;
  opacity: .3 !important;
}

.my-slick-slider a {
  text-decoration: none;
}

.session-card {
  background: #fff;
  padding: 2rem 3.5rem 3rem;
  margin: 0 10px 15px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  width: 100%;
  display: flex;
  flex-direction: column;
  /*justify-content: space-between;*/
}

.session-card .session-ttl {
  font-weight: 600;
  line-height: 1.7;
  font-size: 2rem;
  text-decoration: underline;
}
.session-card .speaker-name {
  color: #000;
  font-size: 1.4rem;
  text-align: center;
  line-height: 1.3;
  font-weight: 600;
}

.session-card .speaker-name span {
  font-size: 1.1rem;
}
.session-card .row {
  margin-right: -5px;
  margin-left: -5px;
}
.session-card .col-3 {
  padding-right: 5px;
  padding-left: 5px;
}

@media (max-width: 577px) {
  .session-card {
    padding: 2rem;
    margin: 0 15px 15px;
  }
  .session-card .session-ttl {
    font-size: 1.6rem;
  }
  .slick-prev {
    left: -10px !important;
    z-index: 20;
  }
  .slick-next {
    right: -10px !important;
    z-index: 20;
  }
}

/* お知らせ */

#top_news {
  padding: 5rem 0 6rem;
}

#top_news p {
  padding: 2rem;
  border-bottom: 1px solid #999;
  font-size: 1.6rem;
}

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

@media (max-width: 577px) {
  #top_news {
    padding: 2rem 0 5rem;
  }
  #top_news p {
    font-size: 1.4rem;
    line-height: 1.7;
  }
}

/* スポンサー */

#top_sponsor {
  padding: 5rem 0 6rem;
  background: linear-gradient(120deg, rgba(255, 192, 43, .8), rgba(255, 124, 80, .8));
  backdrop-filter: blur(10px);
}
#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 6rem;
}

#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 3rem;
  }
  #top_overview table {
    font-size: 1.4rem;
  }
  #top_overview th,
  #top_overview td {
    padding: 1.5rem 0;
  }
  #top_overview ul {
    font-size: 1.2rem;
  }
  #rules p {
    font-size: 1.2rem;
  }
}

/* 行動規範 */

#top_check {
  padding: 0 0 8rem;
}

.accordion-item {
  background-color: #fff;
  margin-bottom: .8rem;
  overflow: hidden;
  border-radius: 4px;
  border: 1px solid #ddd;
}
.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);
}