@charset "utf-8";
/* =================================================================
   1. 基本設定（変数、リセット、基本スタイル）
================================================================== */
:root {
  --color-dark: #1A202C;
  --color-light: #F7FAFC;
  --color-text-light: #EDF2F7;
  --color-text-dark: #2D3748;
  --color-text-gray: #718096;
  --color-accent: #38B2AC;
  --border-color: #E2E8F0;
  --font-base: 'Noto Sans JP', sans-serif;
  --border-radius: 8px;
  --transition: all 0.3s ease-in-out;
}

html {
  font-size: 62.5%;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  font-family: var(--font-base);
  background-color: var(--color-light);
  color: var(--color-text-dark);
  margin: 0;
  font-size: 1.6rem;
  line-height: 1.8;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
}

.container {
  width: 100%;
  max-width: 1024px;
  margin: 0 auto;
}

.highlight {
  color: var(--color-accent);
  font-weight: 700;
}

/* =================================================================
   2. ヘッダー & ヒーロー
================================================================== */
.hero {
  text-align: center;
  padding: 4rem 2rem;
  background: var(--color-dark);
  background: url(./images/2025_nft/top_image.jpg) no-repeat;
  color: var(--color-text-light);
}

.hero__logo-sp {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.hero__logo-pc {
  display: none;
}

.hero__period {
  display: inline-flex;
  align-items: stretch;
  margin: 2rem 0 3rem;
  font-size: 1.8rem;
  font-weight: 700;
  color: #FFFFFF;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 8px;
  overflow: hidden;
  backdrop-filter: blur(4px);
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

/* アイコン部分のスタイル */
.hero__period-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 2rem;
  background-color: rgba(255, 255, 255, 0.1);
  font-size: 2.8rem;
}

/* テキスト部分のスタイル */
.hero__period-text {
  padding: 1rem 2rem;
  font-size: 2.8rem;
}

.hero__sub-text {
  position: relative;
  padding: 1rem 0;
  font-size: 3.2rem;
  font-weight: 900;
  color: #FFFFFF;
  letter-spacing: 0.1em;
  text-shadow: 0 2px 4px rgba(36,98,51,0.9), 0 0 10px rgba(58,137,64,0.5);
}

/* =================================================================
   3. 追従CTAボタン
================================================================== */
.floating-cta {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--color-accent);
  color: var(--color-text-light);
  padding: 1.5rem 2.5rem;
  border-radius: 50px;
  font-weight: 900;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
  z-index: 20;
  transition: var(--transition);
  transform: translateY(200%);
  opacity: 0;
  text-decoration: none;
}

.floating-cta.is-visible {
  transform: translateY(0);
  opacity: 1;
}

.floating-cta:hover {
  transform: translateY(-5px);
}

/* =================================================================
   4. 共通セクションスタイル
================================================================== */
.section {
  padding: 6rem 1.5rem;
}

.section--dark {
  background-color: var(--color-dark);
  color: var(--color-text-light);
}

.section__title {
  font-size: 3.2rem;
  font-weight: 900;
  text-align: center;
  margin: 0 0 4rem;
}

.section__lead {
  font-size: 1.8rem;
  text-align: center;
  max-width: 60rem;
  margin: -2rem auto 4rem;
  color: var(--color-text-gray);
}

/* セクション全体の背景色と余白 */
.section--about-reimagined {
  background-color: var(--color-dark, #1A202C);
  color: #fff;
  padding: 12rem 0;
  overflow: hidden;
}

/* 画面幅いっぱいのグリッドコンテナを作成 */
.full-width-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 2rem 4rem;
  align-items: center;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 4rem;
}

/* --- グリッド内の各要素の配置 --- */
/* タイトル (左側に配置) */
.grid-item--title {
  grid-column: 2 / 6;
  grid-row: 1 / 2;
}
.grid-item--title .section__title {
  font-family: var(--font-serif);
  font-size: 5.6rem;
  text-align: left;
  line-height: 1.3;
}

/* スマートフォン画像 (右側に配置) */
.grid-item--image {
  grid-column: 7 / 12;
  grid-row: 1 / 4;
  text-align: center;
}
.grid-item--image img {
  max-width: 40rem;
  filter: drop-shadow(0 20px 30px rgba(0,0,0,0.3));
}

/* NFTの定義 (タイトルの下に配置) */
.grid-item--definition {
  grid-column: 2 / 7;
  grid-row: 2 / 3;
}
.about-definition {
  display: flex;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 2rem;
  border-radius: 1.2rem;
  font-size: 2.4rem;
}

.about-definition p:first-child {
  padding-right: 2rem;
}

/* 特徴リスト (定義の下に配置) */
.grid-item--features {
  grid-column: 2 / 6;
  grid-row: 3 / 4;
}
.feature-list {
  list-style: none;
  padding: 0;
}
.feature-list li {
  padding-left: 2rem;
  border-left: 3px solid var(--accent-color, #E07A5F);
  margin-bottom: 2rem;
}
.feature-list .highlight {
  font-weight: 700;
  color: var(--accent-color, #E07A5F);
}

/* 最後のサマリーテキスト */
.grid-item--summary {
  grid-column: 2 / 8;
  grid-row: 4 / 5;
  font-size: 2rem;
  font-weight: 700;
}

/* === レスポンシブ対応 (スマートフォン表示) === */
@media (max-width: 768px) {
  .hero__sub-text {
    font-size: 3rem;
  }

  .section--about-reimagined {
    padding: 8rem 0;
  }
  .full-width-grid {
    display: flex;
    flex-direction: column;
    padding: 0 2rem;
    gap: 4rem;
  }
  .grid-item--title .section__title {
    font-size: 4rem;
    text-align: center;
  }
  .grid-item--image {
    order: -1;
  }
}


/* =================================================================
   5. 各コンテンツ要素
================================================================== */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 3rem;
}

.gallery__item {
  text-align: center;
}

.gallery__item img {
  border-radius: var(--border-radius);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.gallery__item figcaption {
  margin-top: 1.5rem;
  font-weight: 700;
}

.about-content {
  text-align: center;
}

.about-content ul {
  list-style: none;
  padding: 0;
  margin: 3rem 0;
  display: inline-flex;
  flex-direction: column;
  gap: 1.5rem;
}

.about-content li {
  background: var(--color-text-dark);
  padding: 1rem 1.5rem;
  border-radius: var(--border-radius);
}

.about-content__image {
  max-width: 300px;
  margin: 2rem auto;
}

.about-content__summary {
  font-size: 2rem;
  font-weight: 900;
}

.steps-overview {
  text-align: center;
}

/* 親コンテナにカウンターをセット */
.process-overview {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin: 3rem 0;
  counter-reset: step-counter;
}

/* 各ステップのボックス */
.process-overview > div {
  position: relative;
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-weight: 700;
  padding: 2rem;
  padding-top: 5rem;
  cursor: pointer;
  transition: all 0.3s ease;
  overflow: hidden;
}

.process-overview > div:hover {
  transform: translateY(-5px);
  background-color: #e2e8f0;
  box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

/* ステップ番号のデザイン */
.process-overview > div::before {
  counter-increment: step-counter;
  content: "STEP " counter(step-counter);
  position: absolute;
  top: 1.5rem;
  left: 2rem;
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--color-accent);
  line-height: 1;
}

.process-overview .large {
  font-size: 2rem;
  display: block;
}

.process-complete-text {
  font-weight: 700;
}

.steps-wrapper {
  max-width: 80rem;
  margin: 6rem auto 0;
}

.step-group {
  background-color: #FFF;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 3rem;
  margin-top: 4rem;
}

.step-group:first-child {
  margin-top: 0;
}

.step-group h2 {
  font-size: 2.8rem;
  font-weight: 900;
  margin: 0 0 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
}

.step-group h3 {
  font-size: 2rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 4rem;
}

.step-group h3 span {
  background-color: var(--color-accent);
  color: var(--color-text-light);
  border-radius: 50%;
  width: 4.8rem;
  height: 4.8rem;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  font-size: 2.0rem;
}

.step-group img {
  margin: 1.5rem 0;
  border-radius: var(--border-radius);
}

.youtube-container {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  margin: 2rem 0;
}

.youtube-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
  border-radius: var(--border-radius);
}

.dl-btnlist {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 1rem;
}

.dl-btn {
  display: block;
  text-align: center;
  background-color: var(--color-light);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  color: var(--color-text-dark);
}

.dl-btn:hover {
  background-color: #38c2ac;
  color: #fff;
  transition: all .2s ease;
}

.dl-text {
  font-size: 2.0rem;
  font-weight: 700;
}

.img-side {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.form-period-promo {
  background: var(--color-dark);
  color: var(--color-text-light);
  text-align: center;
  padding: 3rem;
  margin: 4rem 0;
  border-radius: var(--border-radius);
}

.form-period-promo .wave {
  font-size: 2.4rem;
  font-weight: 900;
}

/* 全体を囲むコンテナ */
.promo-container {
  position: relative;
  display: grid;
  grid-template-columns: 2fr 1fr;
  grid-template-rows: auto 0fr;
  gap: 2rem 4rem;
  align-items: center;
  background: #fff;
  border: 1px solid var(--border-color, #eae2d9);
  padding: 6rem;
  border-radius: 1.6rem;
}

/* 背景に表示する巨大なテキスト */
.promo-container::before {
  content: attr(data-title);
  position: absolute;
  top: 50%;
  left: -5%;
  transform: translateY(-50%);
  font-family: var(--font-serif, serif);
  font-size: 24rem;
  font-weight: 700;
  color: var(--color-bg, #FDFCF8);
  line-height: 1;
  z-index: 1;
  text-shadow: 4px 4px 0px var(--border-color, #eae2d9);
  white-space: nowrap;
}

.promo-title {
  grid-column: 1 / 2;
  grid-row: 1 / 2;
  font-family: var(--font-serif);
  font-size: 18rem;
  line-height: 0.3;
  color: var(--color-accent);
}

.promo-text {
  grid-column: 1 / 2;
  grid-row: 2 / 3;
  z-index: 2;
}

.promo-text p {
  margin: 0;
  font-size: 1.8rem;
}

.promo-text span {
  display: inline-block;
  margin-top: 1.5rem;
  font-size: 1.8rem;
  font-weight: 700;
}

/* 吹き出し本体のスタイル（モバイルファーストで記述） */
.speech-bubble {
  position: relative;
  background-color: #f2fcdf;
  color: #555;
  border-radius: 12px;
  padding: 2rem;
  margin: 4rem 0;
  max-width: 500px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

/* 吹き出しの「しっぽ」部分の共通スタイル */
.speech-bubble::before {
  content: '';
  position: absolute;
  width: 3rem;
  height: 3rem;
  background-color: #f2fcdf;
  transform: rotate(45deg);
}

/* 吹き出し内のpタグのスタイル（余分な余白をリセット） */
.speech-bubble p {
  margin: 0;
}

/* * -----------------------------------------------------------------
 * デフォルト（スマホサイズ）のスタイル：下向きのしっぽ
 * -----------------------------------------------------------------
 */
.speech-bubble::before {
  bottom: -1.5rem;
  left: 15rem;
  border-top-color: transparent;
  border-left-color: transparent;
}


/* キャラクター画像 (右側に配置) */
.promo-character {
  grid-column: 2 / 3;
  grid-row: 1 / 3;
  text-align: center;
  z-index: 2;
  transition: transform 0.4s ease;
}

.promo-character:hover {
  transform: scale(1.05);
}

.promo-character img {
  max-width: 100%;
  height: auto;
  object-fit: contain;
}

/* アニメーションの基準位置と、テキスト自体の設定 */
.highlight-animated {
  position: relative;
  z-index: 1;
  display: inline;
  background: transparent;
  color: inherit;
}

/* 蛍光マーカー本体を擬似要素で作成 */
.highlight-animated::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0.1em;
  width: 100%;
  height: 1.5rem;
  background-color: #ffe277;
  z-index: -1;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 2.5s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* JavaScriptによってis-visibleクラスが付与されたらアニメーションを開始 */
.highlight-animated.is-visible::after {
  transform: scaleX(1);
}

.contact .btn {
  display: block;
  max-width: 24rem;
  margin: 2rem auto 0;
  padding: 2rem;
  background-color: #38c2ac;
  color: #fff;
  border-radius: 5rem;
  transition: all .3s ease;
}

.contact .btn:hover {
  background-color: #718096;
  transition: all .3s ease;
}


/* スマートフォン表示への対応 */
@media (max-width: 768px) {
  .promo-container {
    grid-template-columns: 1fr;
    padding: 4rem 1.5rem;
    text-align: center;
  }

  /* 各要素を縦に並べる */
  .promo-title,
  .promo-text,
  .promo-character {
    grid-column: 1 / -1;
    grid-row: auto;
    font-size: 11rem;
  }

  /* 背景テキストは非表示にするか、サイズを調整 */
  .promo-container::before {
    font-size: 15rem;
    left: 50%;
    top: 20%;
    transform: translate(-50%, -50%);
    opacity: 0.5;
  }

  .hero__period-icon {
    font-size: 2.0rem;
  }

  .hero__period-text {
    font-size: 1.8rem;
  }

  .promo-text::after {
    clip-path: polygon(0 0, 100% 0, 50% 80%);
    top: 33rem;
    right: 12rem;
  }

}

.contact-box {
  text-align: center;
  background: var(--color-light);
  border: 1px solid var(--border-color);
  padding: 4rem;
  border-radius: var(--border-radius);
}

.footer {
  background-color: var(--color-dark);
  color: var(--color-text-light);
  text-align: center;
  padding: 3rem 0;
  font-size: 1.4rem;
}

/* =================================================================
   6. アニメーション
================================================================== */
.animate-on-load {
  animation: fadeIn 0.8s ease-out forwards;
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(2rem);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(1rem);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* =================================================================
   7. レスポンシブ (PC表示)
================================================================== */
@media (min-width: 768px) {
  .section {
    padding: 10rem 0;
  }

  .section__title {
    font-size: 4rem;
  }

  .hero {
    padding: 8rem 0;
  }

  .hero__logo-sp {
    display: none;
  }

  .hero__logo-pc {
    display: block;
  }

  .about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    text-align: left;
    align-items: center;
  }

  .about-content__image {
    order: 2;
  }

  .process-overview {
    grid-template-columns: repeat(4, 1fr);
  }

  .dl-btnlist {
    grid-template-columns: repeat(3, 1fr);
  }

  /* PCでは吹き出しの最大幅を広げる */
  .speech-bubble {
    max-width: 600px;
  }

  /* * -----------------------------------------------------------------
   * PCサイズのスタイル：右向きのしっぽ
   * -----------------------------------------------------------------
   */
  .speech-bubble::before {
    /* 位置を右側に変更 */
    top: 3rem;
    right: -1.5rem;

    /* 位置指定をリセット */
    bottom: auto;
    left: auto;

    /* 消す枠線を変更して、右向きの三角形に見せる */
    border-bottom-color: transparent;
    border-left-color: transparent;
    border-top-color: #2d3748;
  }
}