@charset "UTF-8";

/* 研究テーマ一覧専用。詳細ページへ進む8つの入口を、写真と短い説明で見渡せるようにする。 */
.research-index-themes {
  padding: clamp(54px, 6vw, 82px) clamp(24px, 5vw, 76px) clamp(66px, 7vw, 96px);
  background: #edf5fb;
}

.research-index-themes-inner {
  width: min(100%, 1160px);
  margin: 0 auto;
}

.research-index-heading {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(300px, .72fr);
  gap: clamp(30px, 5vw, 72px);
  align-items: end;
  margin-bottom: clamp(30px, 4vw, 48px);
}

.research-index-heading span {
  display: block;
  margin-bottom: 9px;
  color: #176ea9;
  font-size: 11px;
  font-weight: 850;
  letter-spacing: .14em;
}

.research-index-heading h2 {
  margin: 0;
  color: var(--navy-950);
  font-size: clamp(31px, 3.5vw, 46px);
  line-height: 1.28;
  letter-spacing: -.045em;
}

.research-index-heading p {
  max-width: 520px;
  margin: 0;
  color: #536d80;
  font-size: 15px;
  line-height: 1.9;
}

.research-index-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.research-index-card {
  min-width: 0;
  overflow: hidden;
  background: #fff;
  border: 1px solid #cfdfeb;
  border-radius: 12px;
  box-shadow: 0 9px 24px rgba(14, 53, 85, .055);
}

.research-index-card > a {
  display: grid;
  grid-template-columns: minmax(170px, 38%) minmax(0, 1fr);
  min-height: 258px;
  color: inherit;
  transition: box-shadow .2s ease, transform .2s ease;
}

.research-index-card > a:hover,
.research-index-card > a:focus-visible {
  color: inherit;
  box-shadow: 0 15px 30px rgba(12, 55, 91, .12);
  transform: translateY(-2px);
}

.research-index-card > a:focus-visible {
  outline: 3px solid rgba(8, 119, 232, .25);
  outline-offset: -3px;
}

.research-index-card-media {
  position: relative;
  min-width: 0;
  min-height: 100%;
  overflow: hidden;
  margin: 0;
  background: #dceaf4;
}

.research-index-card-media::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 62%, rgba(4, 38, 68, .18));
  content: "";
  pointer-events: none;
}

.research-index-card-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .35s ease;
}

.research-index-card > a:hover .research-index-card-media img,
.research-index-card > a:focus-visible .research-index-card-media img {
  transform: scale(1.025);
}

.research-index-card-copy {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 25px 24px 22px;
}

.research-index-card-number {
  color: #2877ac;
  font-size: 10px;
  font-weight: 850;
  letter-spacing: .12em;
}

.research-index-card-copy h3 {
  margin: 10px 0 10px;
  color: var(--navy-950);
  font-size: clamp(19px, 1.75vw, 23px);
  line-height: 1.45;
  letter-spacing: -.025em;
}

.research-index-card-copy p {
  margin: 0;
  color: #526b7e;
  font-size: 14px;
  line-height: 1.82;
}

.research-index-card-action {
  display: inline-flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  min-height: 43px;
  margin-top: auto;
  padding-top: 17px;
  color: #0968b5;
  font-size: 12px;
  font-weight: 850;
}

.research-index-card-action i {
  display: inline-grid;
  width: 30px;
  height: 30px;
  place-items: center;
  color: #fff;
  background: var(--navy-800);
  border-radius: 50%;
  font-size: 15px;
  font-style: normal;
  transition: background .2s ease, transform .2s ease;
}

.research-index-card > a:hover .research-index-card-action i,
.research-index-card > a:focus-visible .research-index-card-action i {
  background: var(--blue-600);
  transform: translateX(3px);
}

@media (min-width: 761px) and (max-width: 1180px) {
  .research-index-themes { padding-right: 38px; padding-left: 38px; }
  .research-index-heading { grid-template-columns: minmax(0, 1fr) minmax(260px, .75fr); gap: 30px; }
  .research-index-grid { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .research-index-card > a { grid-template-columns: minmax(210px, 34%) minmax(0, 1fr); min-height: 238px; }
}

@media (max-width: 760px) {
  .research-index-themes { padding: 42px 18px 58px; }
  .research-index-heading { grid-template-columns: minmax(0, 1fr); gap: 13px; margin-bottom: 25px; }
  .research-index-heading span { margin-bottom: 6px; font-size: 9px; }
  .research-index-heading h2 { font-size: 29px; }
  .research-index-heading p { font-size: 13px; line-height: 1.75; }
  .research-index-grid { grid-template-columns: minmax(0, 1fr); gap: 14px; }
  .research-index-card { border-radius: 9px; }
  .research-index-card > a { grid-template-columns: 118px minmax(0, 1fr); min-height: 194px; }
  .research-index-card-copy { padding: 17px 16px 14px; }
  .research-index-card-number { font-size: 8px; }
  .research-index-card-copy h3 { margin: 7px 0 7px; font-size: 18px; }
  .research-index-card-copy p { display: -webkit-box; overflow: hidden; font-size: 12px; line-height: 1.7; -webkit-box-orient: vertical; -webkit-line-clamp: 3; }
  .research-index-card-action { min-height: 38px; padding-top: 10px; font-size: 11px; }
  .research-index-card-action i { width: 27px; height: 27px; }
}

@media (max-width: 430px) {
  .research-index-card > a { grid-template-columns: 104px minmax(0, 1fr); min-height: 184px; }
  .research-index-card-copy { padding-right: 13px; padding-left: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  .research-index-card > a,
  .research-index-card-media img,
  .research-index-card-action i { transition: none; }
}