/* ===========================
   阪神つばめ学習会 - メインスタイル
   =========================== */

/* ── CSS変数 ── */
:root {
  --color-primary:    #3a7d8c;
  --color-primary-dk: #2d626f;
  --color-accent:     #f0a500;
  --color-accent-dk:  #d49200;
  --color-text:       #333333;
  --color-text-light: #666666;
  --color-bg:         #ffffff;
  --color-bg-light:   #f5f7f8;
  --color-border:     #dcdcdc;
  --color-line:       #00b900;

  --font-serif: 'Noto Serif JP', 'ヒラギノ明朝 ProN W3', serif;
  --font-sans:  'Noto Sans JP', 'ヒラギノ角ゴ ProN W3', sans-serif;

  --radius: 6px;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --shadow-hover: 0 6px 24px rgba(0,0,0,0.14);
  --transition: 0.22s ease;

  --container: 1100px;
  --gap: 32px;
}

/* ── リセット・ベース ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-dk); }
ul { list-style: none; }

/* ── コンテナ ── */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── セクション共通 ── */
.section-pad { padding: 72px 0; }
.bg-light { background: var(--color-bg-light); }
.bg-primary { background: var(--color-primary); }
.text-center { text-align: center; }
.mt-8  { margin-top:  8px; }
.mt-16 { margin-top: 16px; }
.mt-32 { margin-top: 32px; }

.section-title {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--color-text);
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}
.section-title::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: var(--color-accent);
  margin: 10px auto 0;
  border-radius: 2px;
}
.section-lead {
  text-align: center;
  color: var(--color-text-light);
  margin-bottom: 40px;
  font-size: 0.98rem;
}

/* ============================
   ヘッダー
   ============================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 1px 6px rgba(0,0,0,0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}

/* ロゴ */
.site-logo a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
  text-decoration: none;
}
.logo-icon { font-size: 1.6rem; line-height: 1; }
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-main {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
}
.logo-sub {
  font-size: 0.68rem;
  color: var(--color-text-light);
  letter-spacing: 0.05em;
}

/* グローバルナビ */
.global-nav ul {
  display: flex;
  gap: 2px;
  align-items: center;
}
.global-nav ul li a {
  display: block;
  padding: 6px 10px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}
.global-nav ul li a:hover,
.global-nav ul li a.active {
  background: var(--color-primary);
  color: #fff;
}

/* ハンバーガー */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

/* ============================
   HERO
   ============================ */
.hero {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  background:
    linear-gradient(135deg, #1a4f5c 0%, #2d7a8a 50%, #3a9aaa 100%);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(240,165,0,0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255,255,255,0.08) 0%, transparent 50%);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(20, 60, 72, 0.35);
}
.hero-content {
  position: relative;
  z-index: 1;
  color: #fff;
  padding-top: 40px;
  padding-bottom: 60px;
}
.hero-catch-sub {
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  opacity: 0.9;
  margin-bottom: 12px;
}
.hero-catch {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 20px;
  letter-spacing: 0.04em;
}
.hero-desc {
  font-size: 1rem;
  line-height: 1.9;
  opacity: 0.92;
  margin-bottom: 36px;
}
.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ============================
   お知らせバー
   ============================ */
.news-bar {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 0;
}
.news-bar .container {
  display: flex;
  align-items: stretch;
  min-height: 44px;
}
.news-label {
  display: flex;
  align-items: center;
  padding: 10px 16px;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  white-space: nowrap;
  flex-shrink: 0;
}
.news-list {
  display: flex;
  align-items: center;
  gap: 0;
  overflow-x: auto;
  padding: 0 16px;
}
.news-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  font-size: 0.82rem;
  white-space: nowrap;
  border-right: 1px solid var(--color-border);
}
.news-list li:last-child { border-right: none; }
.news-date { color: var(--color-text-light); font-size: 0.76rem; }

/* ============================
   特徴カード
   ============================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
}
.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-primary);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition);
}
.feature-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.feature-icon { font-size: 2.4rem; margin-bottom: 16px; }
.feature-card h3 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-primary);
}
.feature-card p { font-size: 0.88rem; color: var(--color-text-light); line-height: 1.8; }

/* ============================
   スケジュール
   ============================ */
.calendar-wrap {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.calendar-wrap iframe { display: block; }
.calendar-note {
  padding: 8px 16px;
  font-size: 0.78rem;
  color: var(--color-text-light);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-light);
}

/* ============================
   教室MAP
   ============================ */
.classroom-info-wrap {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--gap);
  align-items: start;
}
.classroom-name {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent);
}
.info-table { display: grid; grid-template-columns: 80px 1fr; gap: 10px 16px; }
.info-table dt {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--color-text-light);
  padding-top: 2px;
}
.info-table dd { font-size: 0.9rem; }
.classroom-map {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.classroom-map iframe { display: block; }

/* ============================
   ボランティアCTA
   ============================ */
.cta-title {
  font-family: var(--font-serif);
  font-size: 1.7rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}
.cta-desc {
  color: rgba(255,255,255,0.9);
  font-size: 0.95rem;
  line-height: 1.9;
  margin-bottom: 32px;
}
.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ============================
   活動報告カード
   ============================ */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
}
.blog-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition);
}
.blog-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.blog-thumb {
  width: 100%;
  height: 180px;
  object-fit: cover;
}
.blog-thumb-placeholder {
  background: linear-gradient(135deg, var(--color-primary) 0%, #5aa8b8 100%);
}
.blog-body { padding: 20px; }
.blog-date { font-size: 0.76rem; color: var(--color-text-light); }
.blog-body h3 {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 700;
  margin: 6px 0 10px;
  line-height: 1.5;
}
.blog-body h3 a { color: var(--color-text); }
.blog-body h3 a:hover { color: var(--color-primary); }
.blog-body p { font-size: 0.83rem; color: var(--color-text-light); line-height: 1.7; }

/* ============================
   寄付セクション
   ============================ */
.donate-section { border-top: 1px solid var(--color-border); }

/* ============================
   フッター
   ============================ */
.site-footer {
  background: #1e3a42;
  color: rgba(255,255,255,0.85);
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 40px;
  padding-top: 56px;
  padding-bottom: 40px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}
.footer-logo .logo-icon { font-size: 1.4rem; }
.footer-logo .logo-main {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
}
.footer-desc { font-size: 0.82rem; line-height: 1.8; color: rgba(255,255,255,0.7); }
.footer-col h4 {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.2);
}
.footer-nav li { margin-bottom: 6px; }
.footer-nav li a {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.7);
  transition: color var(--transition);
}
.footer-nav li a:hover { color: var(--color-accent); }
.footer-col p { font-size: 0.82rem; line-height: 1.8; color: rgba(255,255,255,0.7); margin-bottom: 12px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding: 16px 24px;
  text-align: center;
}
.footer-bottom p { font-size: 0.76rem; color: rgba(255,255,255,0.5); }