@import url('https://fonts.googleapis.com/css2?family=Montserrat:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400;1,500;1,600&display=swap');

body {
  font-family: 'Montserrat', sans-serif;
  font-weight: 300;
  /* --gutter-width:40px; */
}

a {
  color: rgb(32, 32, 228);
}

/* ヒーロースライド */
.bl_heroEvent {
  position: relative;
  height: 375px;
  display: flex;
  flex-flow: column;
  justify-content: center;
  align-items: center;
}

/* スマホ対応 */
@media (max-width: 768px) {
  .ok_photos {
    grid-template-columns: repeat(2, 1fr);
  }
}


.bl_heroEvent_slideer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 375px;
  background-color: #000;
  overflow: hidden;
}

.bl_heroEvent_title {
  background-color: rgba(105, 105, 105, 0.3);
  width: 100%;
  /* height: 140px; */
  padding: .875rem 1rem;
  margin: 0;
  z-index: 2;
  display: flex;
  flex-flow: column;
  justify-content: center;
  align-items: center;
  color: #fff;
  font-size: 29px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: .1em;
  text-shadow: 0 0 10px #000;
  text-align: center;
}

.bl_heroEvent_title .main {
  font-size: 27px;
}

.bl_heroEvent_title .sub {
  font-size: 14px;
  margin-bottom: .5em;
}

.bl_heroEvent_title span {
  display: block;
}

.bl_heroEvent_slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 375px;
  background-position: center bottom;
  background-size: cover;
  z-index: 1;
  animation-name: anime;
  animation-delay: 0;
  animation-iteration-count: infinite;
  animation-duration: 30s;
  /* ①で設定したanimation-delayを合計を挿入 */
  opacity: 0;
}

.bl_heroEvent,
.bl_heroEvent_slideer,
.bl_heroEvent_slide {
  aspect-ratio: 4 / 2.3;
  height: auto;
}

.bl_heroEvent_slide:nth-child(2) {
  animation-delay: 10s;
}

.bl_heroEvent_slide:nth-child(3) {
  animation-delay: 20s;
}

@keyframes anime {
  0% {
    opacity: 0;
  }

  16% {
    opacity: 1;
  }

  33% {
    opacity: 1;
  }

  49% {
    opacity: 0;
  }

  100% {
    opacity: 0;
    transform: scale(1.18);
  }
}


@media (min-width: 768px) {

  .bl_heroEvent,
  .bl_heroEvent_slideer,
  .bl_heroEvent_slide {
    aspect-ratio: auto;
    height: 450px;
  }

  .bl_heroEvent_title {
    min-height: 150px;
    padding: 1rem;
  }

  .bl_heroEvent_title .main {
    font-size: 46px;
  }

  .bl_heroEvent_title .sub {
    font-size: 29px;
    margin-bottom: .1em;
  }

  .bl_heroEvent_title span {
    display: inline;
  }
}

/* ページ内メニュー */
.bg_menuEvent {
  background-color: #F2F2F2;
}

.bl_menuEvent {
  max-width: 1130px;
  list-style-type: none;
  margin: 0 auto;
  padding: 10px 16px;
  display: flex;
  flex-wrap: wrap;
  row-gap: 8px;
  font-size: .875rem;
}

.bl_menuEvent li {
  width: 50%;
}

.bl_menuEvent li a {
  display: flex;
  flex-flow: column;
  justify-content: center;
  align-items: center;
  text-decoration: none;
  color: #000;
  border-right: 1px solid #999999;
  line-height: 1;
  padding: .9375rem 0;
}

.bl_menuEvent li:nth-child(3) a,
.bl_menuEvent li:first-child a {
  border-left: 1px solid #999999;
}

@media (min-width: 768px) {
  .bl_menuEvent {
    font-size: 1rem;
  }

  .bl_menuEvent li {
    width: 25%;
  }

  .bl_menuEvent li:nth-child(3) a {
    border-left: none;
  }

  .bl_menuEvent li a:hover {
    background-color: #000000;
    color: #ffffff;
  }
}



/* 見出し */
.article_base .el_headingEvent_large {
  font-size: 1.625rem;
  font-weight: 400;
  text-align: center;
  line-height: 1.2;
  margin: 0;
  padding: 0;
}

.article_base .el_headingEvent_middle {
  display: flex;
  flex-flow: column;
  justify-content: center;
  align-items: center;
  gap: .5em;
  position: relative;
  font-size: 1.125rem;
  font-weight: 400;
  text-align: center;
  line-height: 1.2;
  color: #696969;
  margin: 0;
}

.article_base .el_headingEvent_middle::after {
  display: block;
  content: '';
  width: 15em;
  height: 1px;
  background-color: #808080;
}

.article_base .el_headingEvent_small {
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.2;
}

@media (min-width: 768px) {
  .article_base .el_headingEvent_large {
    font-size: 2.3125rem;
  }

  .article_base .el_headingEvent_middle {
    font-size: 1.8125rem;
  }

  .article_base .el_headingEvent_small {
    font-size: 1.25rem;
  }
}

/* Overview */
.bl_overview {
  position: relative;
}

.bl_overview::before {
  position: absolute;
  top: 0;
  left: calc(var(--gutter-width) * -1);
  z-index: -1;
  content: '';
  display: block;
  width: 100px;
  height: 96px;
  background-color: #F5F5F5;
}

.bl_overview .bl_overview_title {
  font-size: 1.625rem;
  font-weight: 400;
  color: #A9A9A9;
  margin: 0 0 .5em;
  padding-top: .5em;
  line-height: 1;

}

.bl_overview_lead {
  font-feature-settings: "palt";
}

@media (min-width: 768px) {
  .bl_overview {
    display: flex;
    justify-content: space-between;
    gap: 74px;
  }

  .bl_overview::before {
    position: absolute;
    top: 0;
    left: calc((100% - 100vw) / 2);
    width: calc((100vw - (100% - 450px)) / 2);
    height: 256px;
  }

  .bl_overview .bl_overview_title {
    font-size: 3.6875rem;
    padding-top: .2em;
  }

  .bl_overview_lead {
    padding-top: 2em;
  }
}

/* スケジュール */
.bg_schedule {
  background-image: url(../img/ic_mlphys2023/bg_schedule.jpg);
  background-size: cover;
  background-position: 50% 50%;
  padding-top: 50px;
  padding-bottom: 50px;
}

.bl_schedule {
  display: flex;
  flex-flow: column;
  align-items: center;
  line-height: 1;
  row-gap: 2rem;
}

.bl_schedule_item {
  display: flex;
  flex-flow: column;
  align-items: center;
}

.bl_schedule_year {
  font-size: .875rem;
  color: #696969;
  margin-bottom: 1.4em;
}

.bl_schedule_date {
  font-size: 2.625rem;
  font-weight: 400;
  margin-bottom: .4em;
}

.bl_schedule_text {
  font-size: 1.125rem;
  font-weight: 400;
}

@media (min-width: 768px) {
  .bg_schedule {
    background-attachment: fixed;
    padding-top: 75px;
    padding-bottom: 100px;
  }

  .bl_schedule {
    flex-flow: row;
    align-items: stretch;
    justify-content: space-between;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
  }

  .bl_schedule_year {
    font-size: 1.125rem;
  }

  .bl_schedule_date {
    font-size: 3.4375rem;
  }

  .bl_schedule_text {
    font-size: 1.4375rem;
  }
}

/* スピーカー */
.bl_spearkers+.bl_spearkers {
  margin-top: 40px;
  padding-top: 40px;
  border-top: 1px solid #808080;
}

.article_base .bl_spearkers_title {
  font-weight: 400;
  color: #696969;
  line-height: 1;
}

.bl_spearkers_info {
  margin-top: 2em;
}

.bl_spearkers_list {
  list-style-type: none;
  margin: 0;
  padding: 0;
  line-height: 1.4;
}

.bl_spearkers_list li+li {
  margin-top: 1.5em;
}

.bl_spearkers_year {
  font-size: .75rem;
  margin-bottom: 1em;
}

.bl_spearkers_date {
  font-size: 2.125rem;
  margin-bottom: .5em;
}

.bl_spearkers_text {
  font-size: 1.125rem;
  line-height: 1.4;
}

@media (min-width: 768px) {
  .bl_spearkers {
    display: flex;
    justify-content: space-between;
    gap: 65px;
  }

  .bl_spearkers+.bl_spearkers {
    margin-top: 60px;
    padding-top: 60px;
  }

  .article_base .bl_spearkers_title {
    flex: 0 0 270px;
  }

  .bl_spearkers_info {
    flex: 1 1 auto;
  }

  .bl_spearkers_year {
    font-size: 1.125rem;
  }

  .bl_spearkers_date {
    font-size: 3.6875rem;
  }

  .bl_spearkers_text {
    font-size: 1.8125rem;
  }
}

/* Registration */
.bg_gray {
  background-color: #F5F5F5;
  margin-top: 100px;
  padding-bottom: 100px;
}

.bl_regist {
  background-color: #ffffff;
  padding: 30px;
}

.bl_regist+.bl_regist {
  margin-top: 30px;
}

.article_base .bl_regist_title {
  font-size: 1.125rem;
  font-weight: 400;
  line-height: 1.2;
  position: relative;
  padding-bottom: .75em;
  margin: 0 0 1em;
}

.article_base .bl_regist_title::after {
  content: '';
  display: block;
  width: calc(80% + 30px);
  height: 1px;
  background-color: #999999;
  position: absolute;
  bottom: 0;
  left: -30px;
}

@media (min-width: 768px) {
  .bl_regist {
    background-color: #ffffff;
    padding: 30px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 40px;
  }

  .bl_regist+.bl_regist {
    margin-top: 35px;
  }

  .article_base .bl_regist_title {
    flex: 0 0 305px;
    font-size: 1.3125rem;
    line-height: 1.2;
    position: relative;
    padding-bottom: .75em;
  }

  .article_base .bl_regist_title::after {
    content: '';
    display: block;
    width: calc(100% + 30px);
    height: 1px;
    background-color: #999999;
    position: absolute;
    bottom: 0;
    left: -30px;
  }

  .bl_regist_text {
    flex: 1 1 auto;
    padding-top: 1em;
  }
}


/* タイムテーブル */
.bl_timeTable {
  font-size: .875rem;
  overflow-x: scroll;
  width: 100%;
}

.bl_timeTable table {
  border-collapse: collapse;
  width: 960px;
}

@media (min-width: 960px) {
  .bl_timeTable {
    font-size: 1rem;
    overflow-x: auto;

  }

  .bl_timeTable table {
    width: 100%;
  }
}

.bl_timeTable table {
  border-collapse: collapse;
}

.bl_timeTable table tbody td:nth-child(1) {
  width: 10em;
  position: sticky;
  left: -1px;
}

.bl_timeTable table tbody td:nth-child(2),
.bl_timeTable table tbody td:nth-child(3),
.bl_timeTable table tbody td:nth-child(4),
.bl_timeTable table tbody td:nth-child(5),
.bl_timeTable table tbody td:nth-child(6),
.bl_timeTable table tbody td:nth-child(7) {
  width: 10em;
}

.bl_timeTable table td,
.bl_timeTable table th {
  padding: .5em;
  border: 1px solid #ccc;
  text-align: center;
  font-weight: 500;
  line-height: 1.4;
}

.bl_timeTable table thead tr {
  background-color: #e2e0e0;
}

.bl_timeTable table tbody tr {
  background-color: #f7f7f7;
}

.bl_timeTable table tbody tr:nth-child(even) {
  background-color: #f5f5ff;
}

.bl_timeTable table tbody tr td:nth-child(1) {
  background-color: #f7f7f7;
}

.bl_timeTable table tbody tr:nth-child(even) td:nth-child(1) {
  background-color: #f5f5ff;
}

/* PDFリンク */
.el_linkIcon__pdf {
  display: inline-flex;
  flex-flow: column;
  justify-content: flex-start;
  align-items: center;
  gap: .75em;
  padding: .5em;
  position: relative;
  text-decoration: none;
  color: #000000;
  line-height: 1;
}

.el_linkIcon__pdf::before {
  content: '';
  display: block;
  background-image: url(../img/ic_mlphys2023/icon_pdf.png);
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center center;
  width: 35px;
  height: 35px;
}

.el_linkIcon__pdf:hover {
  opacity: .7;
}

/* MAPリンク */
.el_linkIcon__map {
  display: inline-flex;
  flex-flow: column;
  justify-content: flex-start;
  align-items: center;
  gap: .75em;
  padding: .5em;
  position: relative;
  text-decoration: none;
  color: #000000;
  line-height: 1;
}

.el_linkIcon__map::before {
  content: '';
  display: block;
  background-image: url(../img/ic_mlphys2023/icon_map.png);
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center center;
  width: 35px;
  height: 35px;
}

.el_linkIcon__map:hover {
  opacity: .7;
}


/* Venue写真 */
.bl_photoVenue {
  list-style-type: none;
  max-width: 640px;
  margin: 2rem auto;
  padding: 0;
  display: flex;
  flex-flow: column;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .bl_photoVenue {
    flex-flow: row;
    justify-content: space-around;
    gap: 38px;
  }
}

/* ヘルパー */


.hp_colorAlert {
  color: rgb(201, 12, 12) !important
}

/* ===== hero image position fix ===== */
.bl_heroEvent_slide {
  height: 60vh;
  /* 高さ（必要に応じて調整） */
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center top;
}

/* Schedule を1件だけ中央寄せ */
.bl_schedule {
  justify-content: center;
}

.bl_schedule_item {
  margin: 0 auto;
}