@charset "UTF-8";

/* ============================================================ */
/* 学校課題用ページ school.html 専用スタイル                       */
/* デザイン: 学校課題用_全体pc/sp@4x.png                          */
/* Figma 1920px基準で clamp 設定                                  */
/* ============================================================ */

:root {
  --school-navy: #092e82;
  --school-hero-bg: #e0f4fc;
  --school-cta-bg: #092e82;
}

.school-illust,
.school-video {
  background: #fff;
}

/* ============================================================ */
/* HERO（PCは水色背景でタイトル＋リード一体 / SPはタイトルのみ水色）  */
/* ============================================================ */
.school-hero {
  background: var(--school-hero-bg);
  /* PC: 下paddingは school-lead と連結するよう小さめ */
  padding: clamp(56px, 6vw, 110px) 24px clamp(28px, 3vw, 56px);
  text-align: center;
}
.school-hero__inner {
  max-width: 1240px;
  margin: 0 auto;
}
.school-hero__title {
  font-family: var(--font-display, "Zen Old Mincho", serif);
  font-weight: 700;
  color: var(--school-navy);
  /* hint-intro__title (clamp(2.2rem, 2.34vw, 4.5rem)) と同等トーン */
  font-size: clamp(22px, 2.34vw, 45px);
  line-height: 1.6;
  letter-spacing: 0.04em;
  margin: 0;
}

/* ============================================================ */
/* LEAD（PCは水色背景続き / SPは白背景に分離）                      */
/* ============================================================ */
.school-lead {
  background: var(--school-hero-bg);
  padding: 0 24px clamp(56px, 6vw, 110px);
  text-align: center;
}
.school-lead__inner {
  max-width: 1240px;
  margin: 0 auto;
}
.school-lead__text {
  color: #000;
  /* hint-intro__lead と同等 (1920px時 30px / 1440px時 22.5px / clamp min 14px) */
  font-size: clamp(14px, 1.5625vw, 30px);
  line-height: 1.8;
  letter-spacing: 0.04em;
  margin: 0;
}

/* ============================================================ */
/* どんな文房具にする？ イラスト                                    */
/* ============================================================ */
.school-illust {
  padding: clamp(60px, 6vw, 110px) 24px clamp(60px, 6vw, 100px);
  background: #fff;
}
.school-illust__inner {
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}
.school-illust__image {
  display: block;
  width: 100%;
  height: auto;
  max-width: 720px;
  margin: 0 auto;
}

/* ============================================================ */
/* 授業で使用可能な動画                                            */
/* ============================================================ */
.school-video {
  padding: 0 24px clamp(80px, 8vw, 140px);
  background: #fff;
}
.school-video__inner {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}
.school-video__lead {
  font-family: var(--font-display, "Zen Old Mincho", serif);
  font-weight: 700;
  font-size: clamp(18px, 1.4vw, 26px);
  color: #000;
  letter-spacing: 0.04em;
  margin: 0 0 clamp(20px, 2vw, 36px);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.school-video__arrow img {
  width: clamp(16px, 1.2vw, 22px);
  height: auto;
  display: block;
}

/* 16:9 レスポンシブ iframe */
.school-video__frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #d9d9d9;
  margin: 0 auto clamp(40px, 4vw, 70px);
  overflow: hidden;
  border-radius: 4px;
}
.school-video__frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* CTAボタン（紺色、押し込みアニメ amatuf#14 と同パターン）*/
.school-video__cta-wrap {
  display: flex;
  justify-content: center;
}
.school-video__cta {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  font-family: var(--font-display, "Zen Old Mincho", serif);
  font-weight: 700;
  color: #fff;
  background: var(--school-cta-bg);
  font-size: clamp(15px, 1.1vw, 20px);
  line-height: 1.5;
  letter-spacing: 0.04em;
  padding: clamp(20px, 2vw, 30px) clamp(40px, 4vw, 70px);
  text-decoration: none;
  border-radius: 6px;
  min-width: clamp(280px, 25vw, 420px);
  filter: drop-shadow(0 6px 0 #cccccc);
  transition: filter 0.2s ease, transform 0.2s ease;
}
.school-video__cta:hover {
  filter: drop-shadow(0 0 0 #cccccc);
  transform: translateY(6px);
  opacity: 1;
}

/* ============================================================ */
/* SP (max-width: 768px)                                          */
/* ============================================================ */
@media (max-width: 768px) {
  .school-hero {
    /* SP: タイトルのみ水色 + 上下padding バランス */
    padding: 40px 20px 40px;
  }
  .school-hero__title {
    font-size: 22px;
    line-height: 1.7;
  }
  /* SP: 水色背景を文章まで伸ばす (hero と lead を一体表示) */
  .school-lead {
    padding: 8px 20px 32px;
  }
  .school-lead__text {
    font-size: 13px;
    line-height: 1.9;
  }

  .school-illust {
    padding: 40px 24px 40px;
  }
  .school-illust__image {
    max-width: 100%;
  }

  .school-video {
    padding: 0 20px 60px;
  }
  .school-video__lead {
    font-size: 16px;
  }
  .school-video__cta {
    font-size: 14px;
    min-width: 240px;
    padding: 18px 24px;
  }
}

/* PC専用 br */
.u-br-pc-only {
  display: inline;
}
@media (max-width: 768px) {
  .u-br-pc-only {
    display: none;
  }
}