:root {
  color-scheme: light;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { min-width: 320px; background: #f4f4f4; }

body {
  min-width: 320px;
  margin: 0;
  background: #f4f4f4;
  color: #171717;
  font-family: inherit;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.research-page {
  width: calc(100% - 48px);
  max-width: 820px;
  margin: 0 auto;
  padding: 28px 0 100px;
}

.research-back {
  display: inline-block;
  margin-bottom: 34px;
  color: #666;
  font-size: 15px;
  text-decoration: none;
}

.research-back:hover,
.research-back:focus-visible { color: #171717; text-decoration: underline; }

.research-header { padding-bottom: 38px; border-bottom: 1px solid #d7d7d7; }

.research-kicker {
  margin: 0 0 13px;
  color: #767676;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.3;
}

h1, h2, h3, p, blockquote { margin-top: 0; }

h1 {
  max-width: 780px;
  margin-bottom: 0;
  font-size: clamp(38px, 5vw, 58px);
  font-weight: 800;
  letter-spacing: -0.055em;
  line-height: 1.02;
}

.research-content {
  padding-top: 42px;
  font-size: 18px;
  letter-spacing: -0.018em;
  line-height: 1.58;
}

.research-content h2 {
  margin: 70px 0 22px;
  font-size: clamp(28px, 3.4vw, 38px);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 1.08;
}

.research-content h2:first-child { margin-top: 0; }

.research-content h3 {
  margin: 42px 0 17px;
  font-size: 23px;
  font-weight: 800;
  letter-spacing: -0.033em;
  line-height: 1.18;
}

.research-content p { margin-bottom: 18px; }

.research-content blockquote {
  margin: 26px 0;
  padding: 18px 21px;
  border-radius: 16px;
  background: #fff;
  font-weight: 500;
  line-height: 1.45;
}

.research-content a {
  overflow-wrap: anywhere;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.research-source__title {
  margin-top: 30px !important;
  margin-bottom: 4px !important;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.35;
}

.research-source__link {
  margin-bottom: 12px !important;
  color: #555;
  font-size: 14px;
  line-height: 1.35;
}

.research-citation {
  color: inherit;
  font-weight: inherit;
  text-decoration-thickness: 1px;
}

.research-index-page {
  max-width: 980px;
}

.research-index__header {
  margin-bottom: 34px;
}

.research-index__header h1 {
  font-size: clamp(42px, 5vw, 58px);
}

.research-list {
  display: grid;
  gap: 14px;
}

.research-list-card {
  display: flex;
  min-height: 122px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 25px 28px;
  border-radius: 22px;
  background: #fff;
  color: #171717;
  font-size: 23px;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  text-decoration: none;
  transition: box-shadow 180ms ease;
}

.research-list-card:hover,
.research-list-card:focus-visible {
  box-shadow: inset 0 0 0 2px #171717;
}

.research-list-card:focus-visible {
  outline: 3px solid #5a36d6;
  outline-offset: 4px;
}

.research-list-card time {
  flex: 0 0 auto;
  color: #767676;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: -0.02em;
}

@media (max-width: 767px) {
  .research-page { width: calc(100% - 32px); padding: 20px 0 72px; }
  .research-back { margin-bottom: 28px; }
  .research-header { padding-bottom: 30px; }
  .research-content { padding-top: 32px; font-size: 17px; line-height: 1.55; }
  .research-content h2 { margin-top: 52px; }
  .research-content h3 { margin-top: 34px; font-size: 21px; }
  .research-content blockquote { margin: 22px 0; padding: 16px 17px; }
  .research-index__header { margin-bottom: 28px; }
  .research-list-card {
    min-height: 0;
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    padding: 20px;
    font-size: 21px;
  }
  .research-list-card time { font-size: 15px; }
}