:root {
  --text: #1f2428;
  --muted: #667078;
  --line: #e7e9eb;
  --soft: #f7f7f7;
  --accent: #ba1428;
  --accent-dark: #8f0e1e;
  --ink: #111;
  --white: #fff;
  --shadow: 0 18px 45px rgba(20, 24, 28, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--white);
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Yu Gothic", YuGothic, "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  line-height: 1.75;
}

main {
  background: var(--white);
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  min-height: 76px;
  padding: 14px clamp(18px, 4vw, 58px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-width: 0;
}

.brand img {
  display: block;
  width: min(360px, 58vw);
  height: auto;
}

.hero {
  min-height: clamp(360px, 62vh, 640px);
  display: grid;
  align-items: center;
  padding: 82px clamp(22px, 5vw, 78px);
  color: var(--ink);
  background-color: var(--white);
  background-image: url("https://feda.kyushu-u.ac.jp/wp-content/uploads/2026/02/thumb1.png");
  background-position: center;
  background-repeat: no-repeat;
  background-size: min(1220px, 88vw) auto;
}

.hero-inner {
  width: min(1080px, 100%);
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.3;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: var(--white);
}

h1,
h2 {
  margin: 0;
  color: inherit;
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: 0;
}

h1 {
  max-width: 780px;
  font-size: clamp(48px, 8vw, 104px);
}

h2 {
  font-size: clamp(28px, 4vw, 48px);
}

.lead {
  max-width: 720px;
  margin: 22px 0 0;
  font-size: clamp(17px, 2.1vw, 24px);
  font-weight: 600;
}

.portal-section {
  width: min(1180px, calc(100% - 44px));
  margin: 0 auto;
  padding: clamp(60px, 8vw, 104px) 0;
  background: var(--white);
}

.section-head {
  display: block;
  margin-bottom: 32px;
}

.section-head .eyebrow {
  margin-bottom: 8px;
}

.portal-list {
  display: grid;
  border-top: 1px solid var(--line);
}

.portal-item {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: clamp(18px, 3vw, 34px);
  padding: clamp(26px, 4vw, 42px) 0;
  border-bottom: 1px solid var(--line);
}

.portal-item__number {
  color: #c8cdd1;
  font-size: clamp(16px, 2vw, 22px);
  font-weight: 800;
  line-height: 1.45;
}

.portal-item__body {
  display: grid;
  gap: 16px;
}

.portal-item h3 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(22px, 3vw, 36px);
  line-height: 1.3;
  letter-spacing: 0;
}

.portal-status {
  margin: 0;
  color: var(--muted);
  font-size: clamp(15px, 1.5vw, 18px);
  font-weight: 700;
}

.portal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.portal-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  color: var(--accent);
  background: var(--white);
  border: 1px solid var(--accent);
  border-radius: 999px;
  font-size: clamp(14px, 1.35vw, 16px);
  font-weight: 800;
}

.portal-links a:hover,
.portal-links a:focus-visible {
  color: var(--white);
  background: var(--accent);
  outline: 0;
}

.site-footer {
  background: #fff;
}

.footer-gradient {
  min-height: 56px;
  background: url("https://feda.kyushu-u.ac.jp/wp-content/uploads/2025/09/グラデーション@4x-100.jpg") center / cover;
}

.footer-inner {
  width: min(1180px, calc(100% - 44px));
  display: grid;
  grid-template-columns: minmax(260px, 420px) minmax(280px, 1fr);
  gap: clamp(36px, 7vw, 96px);
  align-items: end;
  margin: 0 auto;
  padding: clamp(42px, 7vw, 82px) 0;
}

.footer-logos {
  display: grid;
  gap: clamp(14px, 2.5vw, 22px);
  align-content: end;
  justify-items: start;
}

.footer-logos img {
  display: block;
  width: min(380px, 100%);
  height: auto;
}

.footer-address {
  color: var(--accent-dark);
  font-style: normal;
  font-size: clamp(15px, 1.55vw, 22px);
  font-weight: 500;
  line-height: 1.58;
  max-width: 620px;
  justify-self: end;
}

.footer-address p {
  margin: 0 0 clamp(16px, 2.2vw, 28px);
}

.footer-address p:last-child {
  margin-bottom: 0;
}

.footer-address__title {
  line-height: 1.45;
}

.footer-address strong {
  display: block;
  color: var(--accent-dark);
  font-weight: 800;
}

.copyright {
  margin: 0;
  padding: 16px 22px;
  color: var(--muted);
  background: var(--soft);
  font-size: 12px;
  text-align: center;
}

@media (max-width: 720px) {
  .site-header {
    position: static;
    align-items: center;
  }

  .hero {
    min-height: 420px;
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .portal-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .footer-address {
    justify-self: start;
    max-width: 100%;
    font-size: clamp(15px, 4vw, 20px);
  }
}