/* ===== base ===== */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  color: #fff;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans JP",
               "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
}

/* ===== background ===== */
.page-bg{
  position: fixed;
  inset: 0;
  z-index: -1;

  /* 背景画像を差し替え（キャンパス/並木道など） */
  background-image:
    linear-gradient(rgba(0,0,0,.55), rgba(0,0,0,.55)),
    url("img/bg.jpg");
  background-size: cover;
  background-position: center;
}

.container{
  max-width: 980px;
  margin: 0 auto;
  padding: 0 18px 40px;
}

/* ===== header ===== */
.header{
  margin-top: 16px;
  display: grid;
  grid-template-columns: 1fr 300px;
  align-items: stretch;
  background: #1b5f96; /* 上部の青帯 */
  border-radius: 2px;
  overflow: hidden;
}

.header__left{
  padding: 22px 24px;
}

.header__en{
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 700;
  font-size: 34px;
  letter-spacing: .02em;
}

.header__ja{
  margin: 6px 0 0;
  font-size: 18px;
  opacity: .95;
}

.header__title{
  margin: 12px 0 0;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 700;
  font-size: 34px;
  letter-spacing: .02em;
}

.header__right{
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: rgba(255,255,255,.08);
}

.header__img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ===== main ===== */
.main{
  margin-top: 14px;
}

.main__headline{
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: .02em;
}

.main__grid{
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 22px;
  align-items: start;
  margin-bottom: 0px;
}

/* left info */
.info{
  padding: 8px 6px;
}
.info__block + .info__block{ margin-top: 26px; }

.info__h{
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 800;
}
.info__p{
  margin: 6px 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .02em;
}

/* right cards */
.cards{
  display: grid;
  gap: 18px;
  padding-top: 6px;
}

.card{
  position: relative;
  padding: 13px 18px 16px;
  border-radius: 2px;
  overflow: hidden;
  box-shadow: 0 10px 24px rgba(0,0,0,.18);
}

.card--blue{ background: #E58961; }
.card--green{ background: #00A29A; }
.card--purple{ background: #708090; }


.card__badge{
  position: absolute;
  right: 12px;
  top: 12px;
  width: 72px;
  height: 72px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 13px;
  color: #fff;
  background: rgba(0,0,0,.22);
  box-shadow: 0 4px 12px rgba(0,0,0,.3);
}

.card__badge--blue{ background: #E58961; }
.card__badge--green{ background: #00A29A; }
.card__badge--purple{ background: #708090; }
.card__title{
  margin: 0 0 10px;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: .02em;
}

.card__text, .card__note{
  margin: 10px 0 0;
  line-height: 1.75;
  font-size: 14px;
  opacity: .95;
}

.card__link{
  color: #e8f3ff;
  font-weight: 900;
  text-decoration: underline;
}

.card__cta{
  margin: 10px 0 0;
}

.card__btn{
  display: inline-block;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,.14);
  color: #fff;
  text-decoration: underline;
  font-weight: 900;
  letter-spacing: .02em;
}
.card__btn:hover{
  background: rgba(255,255,255,.22);
}

/* anchors (demo) */
.anchor{
  margin-top: 26px;
  padding: 12px 14px;
  background: rgba(0,0,0,.25);
  border-radius: 2px;
}
.anchor h2{
  margin: 0 0 6px;
  font-size: 18px;
}

/* ===== responsive ===== */
@media (max-width: 860px){
  .header{
    grid-template-columns: 1fr;
  }
  .header__right{
    grid-template-columns: 1fr 1fr;
    height: 140px;
  }
  .main__grid{
    grid-template-columns: 1fr;
  }
}