@charset "UTF-8";

/*
GENERAL STYLING
================================================ */
html {
  font-size: 100%;
  /* スムーズスクロール */
  scroll-behavior: smooth;
}

body {
  color: #fff;
  font-size: 14px;
  font-family: "Noto Sans JP", "Jost", sans-serif;
  line-height: 2;
  letter-spacing: 0.1em;
  background-image: url(../img/AdobeStock_825227351.gif);
  background-size: cover;
  margin: 0;
  min-height: 100vh;
  border: 10px solid #947C43;
  box-sizing: border-box;
}

/*
COMMON
================================================ */
p {
  line-height: 1.5;
}

img {
  max-width: 100%;
  height: auto;
  vertical-align: bottom;
}

h1,
h2 {
  text-align: center;
  font-family: "Noto Sans JP", sans-serif;
  color: #333;
  font-size: 36px;
  line-height: 1.5;
  font-weight: 600;
}

h2 {
  font-size: 3rem;
  text-shadow:
    1px 1px 3px white,
    -1px 1px 3px white,
    1px -1px 3px white,
    -1px -1px 3px white;
}

h3 {
  font-family: "Noto Sans JP", sans-serif;
  font-size: 36px;
  letter-spacing: -0.01em;
  font-weight: 700;
}

h4 {
  color: #395CA3;
  font-size: 24px;
  font-weight: 600;
  line-height: 1.5;
}

h5 {
  color: #395CA3;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.5;
}

/* Layout */
.wrapper {
  max-width: 1280px;
  width: 80%;
  margin: 60px auto;
  padding: 0 20px;
  box-sizing: border-box;
}

/*
btn
================================================ */
.entry-btn {
  display: flex;
  justify-content: center;
  text-align: center;
  height: 180px;
  background-image: linear-gradient(#997f45, #816d3a);

}

.entry-btn_inner {
  width: 100%;
  max-width: 600px;
  height: 75px;
  padding: 33px 0;
}

.entry-btn_text {
  font-size: 40px;
  font-weight: 700;
  display: inline-block;
  padding: 10px 60px;
  background: #595757;
  border: 2px solid #fff;
}
.entry-btn_text:hover {
  opacity: 0.7;
}

/* tooltip */
.tooltip {
  position: relative;
  cursor: pointer;
  padding: 0 5px;
  font-size: 0.9em;
  color: #395CA3;
}

.description_top { /* ツールチップのスタイル */
  width: 150px; /* 横幅 */
  position: absolute;
  left: 50%;
  bottom: 80%; /* Y軸の位置 */
  transform: translateX(-50%);
  margin-bottom: 8px; /* テキストとの距離 */
  padding: 8px;
  border-radius: 10px; /* 角の丸み */
  background-color: #666;
  font-size: 1em;
  line-height: 1.2;
  color: #fff;
  text-align: center;
  visibility: hidden; /* ツールチップを非表示に */
  opacity: 0; /* 不透明度を0％に */
  z-index: 1;
  transition: 0.5s all; /* マウスオーバー時のアニメーション速度 */
}

.tooltip:hover .description_top { /* マウスオーバー時のスタイル */
  bottom: 100%; /* Y軸の位置 */
  visibility: visible; /* ツールチップを表示 */
  opacity: 1; /* 不透明度を100％に */
}

/*
main-visual
================================================ */
.nano-info {
  font-family: "Jost";
  color: #ffffff;
  text-shadow: 1px 1px 10px #0067b5, 1px 1px 10px #0067b5, 1px 1px 10px #0067b5;
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  align-items: flex-end;
  justify-content: center;
  gap: 10px;
  width: 100%;
  max-width: 1280px;
}

.nano-date {
  font-weight: 600;
  line-height: normal;
  letter-spacing: -0.03em;
  display: flex;
  align-items: flex-end;
  gap: 10px;
  padding-top: 30px;
}

.nano-date_year {
  font-size: 40px;
  margin-right: -0.8em;
}

.nano-date_date {
  font-size: 160px;
  line-height: 1;
  letter-spacing: -0.05em;
}

.nano-date_group {
  display: flex;
  flex-direction: column;
  align-items: center;
  white-space:nowrap;
}

.nano-date_text {
  font-size: 120px;
  margin-bottom: 40px;
  line-height: 0;
}

.nano-date_week {
  font-size: 30px;
}

.nano-text {
  font-size: 36px;
  font-weight: 500;
  display: flex;
  flex-direction: column;
}


/*
concept
================================================ */
.concept_inner {
  background-image: linear-gradient(90deg, #ffffff1a, #ffffffb3 25%, #ffffff 50%, #ffffffb3 75%, #ffffff1a);
  padding: 20px 20px;
}

.concept_img{
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  padding: 20px 0;
  gap: 20px;
}

/* 画像4枚並びの可変対応 */
.concept_item {
  /* gapを考慮して4分割 */
  width: calc(25% - 15px);
  min-width: 200px; /* 小さくなりすぎないように */
  flex-grow: 1;     /* 余白があれば埋める */
}

.concept_sentence {
  color: #333;
  font-size: 16px;
  background-color: rgba(255, 255, 255, 0.6);
  padding: 20px 10px;
}

.concept_text {
  margin-bottom: 2em;
}

.concept_text_decorate {
  font-weight: 800;
}

/*
keynote
================================================ */
.keynote-info {
  width: 100%;
  font-weight: 700;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  gap: 10px;
  background-color: #000;
  padding: 30px 20px;
  box-sizing: border-box;
}

.logo {
  width: 85px;
  height: auto;
  display: flex;
  align-items: center;
  margin-right: 10px;
}

.logo img {
  width: 100%;
  height: auto;
}

.keynote-info_inner,
.keynote-info_group {
  display: flex;
  flex-direction: column;
  justify-content: center;
  margin-right: 10px;
}

.keynote-date-group {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.keynote-info_text {
  font-size: 20px;
  letter-spacing: -0.05em;
}

.keynote-info_box {
  color: #333;
  font-size: 18px;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  gap: 10px;
  background-color: #ffffff;
  height: auto;
  padding:5px;
}

.keynote-info_sub {
  font-size: 16px;
}

.keynote-date {
  font-size: 90px;
  letter-spacing: -0.02em;
}

.keynote-week {
  font-size: 24px;
  margin-top: 70px;
}

.keynote-time {
  font-size: 36px;
  letter-spacing: -0.01em;
}

.keynote-text_main {
  font-size: 20px;
  color: #ffffff;
  text-shadow: 1px 1px 10px #0067b5, 1px 1px 10px #0067b5, 1px 1px 10px #0067b5;
  text-align: center;
  padding-top: 30px;
}

/*
speakers
================================================ */
.keynote_list {
  display: grid;
  grid-template-rows: auto auto;
  grid-template-columns: 1fr 1fr;
  gap: 30px 40px;
}

#speakers_itemA {
  grid-row: 1;
  grid-column: 1;
}

#speakers_itemB {
  grid-row: 1;
  grid-column: 2;
}

#speakers_itemC {
  grid-row: 2;
  grid-column: 1/3;
  width: 80%;
  margin: 0 auto;
}

.keynote_item {
  position: relative;
  color: #333;
  background-color: rgba(255, 255, 255, 0.85);
  display: flex;
  flex-direction: row;
  justify-content: flex-start;
  align-items: flex-start;
  gap: 10px;
  padding: 25px 25px 70px 25px;
}

.keynote_item img {
    width:auto;
    max-width: 110px;
    height: auto;
    object-fit: cover;
    margin-right: 10px;
    margin-bottom: 0;
    flex-shrink: 0;
  }


.speakers-name_group {
  display: flex;
  flex-direction: column;
}

.speakers-name {
  font-size: 20px;
  font-weight: 700;
  padding-top: 10px;
}

.speakers-btn {
  width: 150px;
  font-size: 18px;
  font-weight: 600;
  white-space: nowrap;
  background-color: #fff;
  padding: 2px 15px;
  position: absolute;
  bottom: 20px;
  right: 20px;
  margin-top:20px;
    color:#395CA3;
}


/*
special
================================================ */
.special-info {
  text-align: center;
  background-color: #000;
  height: auto;
  padding: 35px 0;
}

#container {
  display: grid;
  grid-template-rows: auto auto;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

#special_itemA {
  grid-row: 1 / 3;
	grid-column: 1 / 2;
  background-color: rgba(255, 255, 255, 0.85);
  padding: 35px 25px;
  margin-right: 40px;
}

#special_itemB {
	grid-row: 1 / 2;
	grid-column: 2 / 3;
  background-color: rgba(255, 255, 255, 0.85);
  padding: 15px 25px;
  margin-bottom: 20px;
}
#special_itemC {
	grid-row: 2 / 3;
	grid-column: 2 / 3;
  background-color: rgba(255, 255, 255, 0.85);
  padding: 15px 25px;
}

.special_item {
  display: flex;
  place-items: center;
  gap: 10px;
}

.special_item h4 {
  font-size: 20px;
}

.special_contents p {
  color: #000;
  padding-top: 20px;
}

/*
FOOTER
================================================ */
.footer {
  text-align: center;
  font-size: 0.875rem;
  background-color: #656364;
  padding: 20px 0;
}


/* ================================================
      SP版レスポンシブ
      ブレークポイント：768px
 ================================================ */
@media screen and (max-width: 768px) {

  /* ---  全体 --- */
  body {
    border-width: 5px;
    min-width: 320px;
    background-position: center top;
    background-attachment: fixed;
  }

  .wrapper {
    width: 100%;
    margin: 40px auto;
    padding: 0 20px;
    box-sizing: border-box;
  }

  /* フォントサイズの全体調整（スマホで読みやすいサイズへ） */
  p {
    font-size: 14px;
  }

  h2.heading_h2 {
    font-size: 20px;
    line-height: 1.5;
    letter-spacing: -0.01em;
    }

  h3.heading_h3,
  h4 {
    font-size: 20px;
  }


  /* --- Main Visual --- */
.nano-date_year {
  font-size: 20px;
  margin-right: -0.4em;
}
.nano-date_date {
  font-size: 60px;
}
.nano-date_text {
  font-size: 30px;
  margin-bottom: 10px;
  line-height: 0;
}
.nano-text {
  font-size: 24px;
  display: flex;
  flex-direction: column;
}
.nano-date_week {
  font-size:16px;
}
  /* --- Entry Btn --- */
  .entry-btn {
    height: auto;
    padding: 30px 50px;
  }

  .entry-btn_inner {
    width: 100%;
    height: auto;
    padding: 0;
  }

  .entry-btn_text {
    width: 100%;
    padding: 12px 0;
    font-size: 20px;
    box-sizing: border-box;
    text-align: center;
    display: block;
  }

  /* --- Concept --- */
  .concept_inner {
    background-image: none; /* グラデーションを無効化 */
    background-color: rgba(255, 255, 255, 0.85);
    padding: 30px 10px;
  }

  .concept_sentence {
    background-color: transparent; /* 背景を透明にする */
    padding: 0;
  }

  .concept_img {
      padding: 15px 0;
      display: flex;
      justify-content: space-between;
      gap: 10px;
  }

  .concept_item {
    width: calc(50% - 5px);
    min-width: 0;
  }

  .concept_item img {
    width: 100%;
    height: auto;
    object-fit: cover;
  }

  .concept_text {
    text-align: justify;
    font-size: 14px;
    margin-bottom: 1.5em;
  }

  /* ---  Keynote --- */
  .keynote-info {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
    width: 100%;
    height: auto;
    box-sizing: border-box;
    background-color: #000;
    padding: 25px 10px;
    gap: 0;
  }

  .logo {
    width: 60px;
    height: auto;
    margin-right: 15px;
    margin-bottom: 15px;
    flex-shrink: 0;
  }

  .logo img {
    width: 100%;
    height: auto;
    display: block;
  }

  .keynote-info_inner {
    width: calc(100% - 90px);
    margin-bottom: 15px;
    min-width: 0;
    box-sizing: border-box;
    flex: none;
    display: block;
  }

  .keynote-info_inner h3.heading_h3 {
    font-size: 20px;
    margin-bottom: 5px;
    line-height: 1.4;
  }

  .keynote-info_text {
    font-size: 14px;
  }

  .keynote-date-group {
    display: flex;
    align-items: baseline;
    flex-wrap: nowrap;
    width: auto;
    margin: 0;
    gap: 5px;
  }

  .keynote-date {
    font-size: 60px;
    line-height: 1;
    letter-spacing: -0.02em;
    width: auto;
    margin: 0;
    padding: 0;
  }

  .keynote-week {
    font-size: 14px;
    transform: none;
    width: auto;
    margin-top: 20px;
    margin-bottom: 0;
  }

  .keynote-info_group {
    width: auto;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    margin-right: 0;
    height: auto;
  }

  .keynote-time {
    font-size: 26px;
    line-height: 1;
    margin-bottom: 8px;
  }

  .keynote-info_box {
    background-color: #fff;
    height: auto;
    padding: 2px 8px;
    display: inline-block;
  }

.keynote-info_box .keynote-info_text {
  color: #333;
  font-size: 14px;
  margin: 0;
}

.keynote-info_sub {
  font-size: 12px;
}

  .keynote-text_main {
    font-size: 14px;
    padding: 20px 15px;
    line-height: 1.6;
  }

  /* ▼ 講演者リスト（Grid解除→Flex縦積み） */
  .keynote_list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 20px;
  }

  /* ID指定されているGrid設定を強制リセット */
  #speakers_itemA,
  #speakers_itemB,
  #speakers_itemC {
    grid-row: auto;
    grid-column: auto;
    width: 100%;
    margin: 0;
  }

  .keynote_item {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: flex-start;
    padding: 25px 20px;
    box-sizing: border-box;
  }

  .keynote_item img {
    width: 110px;
    height: auto;
    object-fit: cover;
    margin-right: 10px;
    margin-bottom: 0;
    flex-shrink: 0;
  }

  .speakers-name_group {
    flex: 1;
    width: auto;
    min-width: 0;
    margin-top: 0;
    text-align: left;
    display: block;
    box-sizing: border-box;
  }

  .speakers-name_group h4 {
    margin-top: 0;
    font-size: 16px;
    line-height: 1.4;
    margin-bottom: 5px;
  }

  .speakers-name {
    font-size: 18px;
    margin: 3px 0;
  }

  .speakers-btn {
    position: static;
    transform: none;
    width: 100%;
    font-size: 18px;
    text-align: center;
    margin-left: auto;
    margin-right: auto;
    white-space: nowrap;
  }

  .speakers-link {
    display: inline-block;
    margin: 0 auto;
    width: 100%;
    max-width: 300px;
    height: 100%;
    padding: 8px 0;
    color:#395CA3;
  }

  /* ---  Special Contents --- */
  .special-info {
    height: auto;
    padding: 30px 15px;
  }

  /* Grid解除 */
  #container {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  #special_itemA,
  #special_itemB,
  #special_itemC {
    grid-row: auto;
    grid-column: auto;
    margin: 0;
    width: 100%;
    padding: 15px 10px;
  }

  /* 余白調整 */
  #special_itemA { margin-right: 0; }
  #special_itemB { margin-bottom: 0; }

  .special_item {
    display: flex;
    place-items: center;
  }

  .special_item h4 {
    font-size: 18px;
    letter-spacing: -0.03em;
  }

  /* --- footer --- */
  .footer {
    padding: 20px 10px;
  }

  .footer-copyright {
    font-size: 10px;
    display: block;
    line-height: 1.4;
  }
}