/* ===========================
   教育推進部門 サイトスタイル
   =========================== */

/* カラー変数 */
:root {
  --color-primary: #5b2d8e;      /* NAIST パープル */
  --color-primary-dark: #4a2270;
  --color-accent: #e8a000;       /* ゴールド アクセント */
  --color-text: #222;
  --color-bg: #fff;
  --color-header-bg: #fff;
  --color-nav-bg: #5b2d8e;
  --color-border: #ddd;
  --color-muted: #666;
  --color-light-bg: #f7f5fb;     /* 薄紫の背景 */
}

/* リセット・ベース */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP",
               "Yu Gothic", "Meiryo", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ===========================
   ヘッダー
   =========================== */

header {
  background: var(--color-header-bg);
  border-bottom: 1px solid #e0d6f0;
  box-shadow: 0 1px 4px rgba(91,45,142,0.07);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 960px;
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
}

.site-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.site-logo {
  height: 52px;
  width: auto;
}

.site-title-text {
  display: flex;
  flex-direction: column;
}

.site-title-text .org {
  font-size: 0.72rem;
  color: #555;
  line-height: 1.4;
}

.site-title-text a {
  color: var(--color-primary);
  font-size: 1.35rem;
  font-weight: bold;
  line-height: 1.4;
  letter-spacing: 0.12em;
}

.lang-en .site-title-text a {
  letter-spacing: 0.01em;
  font-size: 1.2rem;
}

.lang-switch {
  color: #fff;
  font-size: 0.8rem;
  background: var(--color-primary);
  padding: 0.25rem 0.75rem;
  border-radius: 3px;
}

.lang-switch:hover {
  background: var(--color-primary-dark);
  text-decoration: none;
}

/* ===========================
   ナビゲーション
   =========================== */

.main-nav {
  background: var(--color-nav-bg);
  max-width: 100%;
  padding: 0 1.5rem;
}

.main-nav a {
  display: inline-block;
  color: rgba(255,255,255,0.88);
  padding: 0.6rem 1.1rem;
  font-size: 0.88rem;
}

.main-nav a:hover {
  color: #fff;
  text-decoration: none;
  background: rgba(255,255,255,0.12);
}

/* ===========================
   ヒーロー
   =========================== */

.hero {
  position: relative;
  height: 320px;
  overflow: hidden;
}

.hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  display: block;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    transparent 30%,
    rgba(91, 45, 142, 0.55) 60%,
    rgba(74, 34, 112, 0.85) 100%
  );
}

.hero-text {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  padding: 2rem 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-end;
  max-width: 55%;
  text-align: right;
}

.hero-label {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.75);
  letter-spacing: 0.12em;
  margin: 0 0 0.5rem;
}

.hero-title {
  font-size: 1.55rem;
  font-weight: 500;
  color: #fff;
  line-height: 1.65;
  margin: 0 0 0.75rem;
}

.hero-subtitle {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.85);
  line-height: 1.8;
  margin: 0;
}

@media (max-width: 600px) {
  .hero {
    height: 240px;
  }

  .hero-overlay {
    background: linear-gradient(
      to bottom,
      transparent 20%,
      rgba(74, 34, 112, 0.78) 100%
    );
  }

  .hero-text {
    max-width: 100%;
    right: 0;
    left: 0;
    top: auto;
    bottom: 0;
    align-items: flex-start;
    text-align: left;
    padding: 1.25rem;
  }

  .hero-title {
    font-size: 1.15rem;
  }
}

/* ===========================
   メインコンテンツ
   =========================== */

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

h1 {
  font-size: 1.55rem;
  font-weight: bold;
  color: var(--color-primary);
  margin-top: 0;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-accent);
}

h2 {
  font-size: 1.15rem;
  color: var(--color-primary);
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  padding-left: 0.75rem;
  border-left: 4px solid var(--color-accent);
}

h3 {
  font-size: 1rem;
  color: #444;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

p {
  margin: 0.75rem 0 1rem;
}

ul, ol {
  padding-left: 1.5rem;
  margin: 0.5rem 0 1rem;
}

li {
  margin-bottom: 0.5rem;
}

li a {
  font-weight: bold;
}

/* ===========================
   お知らせ
   =========================== */

.news-list {
  border-left: 4px solid var(--color-accent);
  padding-left: 1rem;
  margin: 0.75rem 0 2rem;
}

.news-list li {
  font-size: 0.9rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid #e8e0f2;
}

.news-list li:last-child {
  border-bottom: none;
}

/* ===========================
   カードグリッド（取り組み一覧）
   =========================== */

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-top: 1.25rem;
}

.card {
  position: relative;
  background: var(--color-light-bg);
  border-top: 3px solid var(--color-accent);
  border-left: 3px solid var(--color-accent);
  border-radius: 6px;
  padding: 1rem 1.1rem;
  transition: box-shadow 0.15s, background 0.15s;
}

.card:has(h3 a):hover {
  background: #ede8f5;
  box-shadow: 0 2px 8px rgba(91,45,142,0.12);
}

.card h3 {
  font-size: 0.95rem;
  color: var(--color-primary);
  margin: 0 0 0.5rem;
}

/* 見出しリンクでカード全体をクリック可能にする */
.card h3 a {
  color: var(--color-primary);
  text-decoration: none;
}

.card h3 a::after {
  content: '';
  position: absolute;
  inset: 0;
}

.card h3 a:hover {
  text-decoration: none;
}

.card p {
  font-size: 0.88rem;
  color: #444;
  line-height: 1.7;
  margin: 0;
}

@media (max-width: 600px) {
  .card-grid {
    grid-template-columns: 1fr;
  }
}

/* ===========================
   テーブル
   =========================== */

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  margin: 1rem 0 2rem;
}

th {
  background: var(--color-primary);
  color: #fff;
  padding: 0.6rem 1rem;
  text-align: left;
  font-weight: normal;
}

td {
  padding: 0.55rem 1rem;
  border-bottom: 1px solid #e0d6f0;
  vertical-align: top;
}

tr:last-child td {
  border-bottom: none;
}

tr:nth-child(even) td {
  background: var(--color-light-bg);
}

/* ===========================
   メンバーカード
   =========================== */

.member-card {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid #e0d6f0;
}

.member-card:last-of-type {
  border-bottom: none;
}

.member-photo {
  width: 100px;
  height: 100px;
  object-fit: cover;
  object-position: center top;
  border-radius: 50%;
  flex-shrink: 0;
  border: 3px solid var(--color-light-bg);
  box-shadow: 0 1px 4px rgba(91,45,142,0.15);
}

.member-info {
  flex: 1;
}

.member-info h3 {
  font-size: 1.05rem;
  color: var(--color-primary);
  margin-top: 0.25rem;
  margin-bottom: 0.5rem;
}

.member-info ul {
  margin: 0;
  padding-left: 0;
  list-style: none;
  font-size: 0.88rem;
  color: #444;
}

.member-info li {
  margin-bottom: 0.2rem;
}

@media (max-width: 600px) {
  .member-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .member-info ul {
    text-align: left;
  }
}

/* ===========================
   フッター
   =========================== */

footer {
  background: var(--color-light-bg);
  border-top: 1px solid #e0d6f0;
  text-align: center;
  padding: 1.5rem;
  font-size: 0.8rem;
  color: var(--color-muted);
}

/* ===========================
   レスポンシブ
   =========================== */

@media (max-width: 600px) {
  .site-title .org {
    display: none;
  }

  .main-nav a {
    padding: 0.5rem 0.6rem;
    font-size: 0.82rem;
  }

  main {
    padding: 1.5rem 1rem 3rem;
  }

  h1 {
    font-size: 1.3rem;
  }
}