*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --orange: #F57C00;
  --orange-light: #FFB74D;
  --navy: #1A237E;
  --navy-light: #283593;
  --bg: #FFF8F0;
  --text: #333;
  --white: #fff;
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

/* ========== HEADER ========== */
header {
  background: var(--navy);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.header-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.logo {
  color: var(--white);
  font-weight: 900;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
.logo-ball { font-size: 1.4rem; }
nav { display: flex; gap: 24px; }
nav a {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 700;
  transition: color 0.2s;
}
nav a:hover { color: var(--orange-light); }
nav a.active { color: var(--orange-light); border-bottom: 2px solid var(--orange-light); }

/* ========== SECTION COMMON ========== */
section { padding: 60px 20px; }
.section-inner { max-width: 900px; margin: 0 auto; }
.section-title {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--navy);
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-title::after {
  content: '';
  flex: 1;
  height: 3px;
  background: linear-gradient(to right, var(--orange), transparent);
  border-radius: 2px;
}

/* ========== REPORT CARDS ========== */
.reports-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 12px;
}
.reports-count {
  background: var(--navy);
  color: var(--white);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
}
.report-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.report-card {
  background: var(--white);
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(26,35,126,0.08);
  overflow: hidden;
}
.report-card-header {
  background: var(--navy);
  color: var(--white);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.report-date {
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 0.03em;
}
.report-meta { display: flex; gap: 10px; flex-wrap: wrap; }
.report-chip {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 6px;
  padding: 3px 10px;
  font-size: 0.78rem;
  font-weight: 700;
}
.report-chip.highlight {
  background: var(--orange);
  border-color: var(--orange);
}
.report-card-body { padding: 20px; }
.report-summary {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
}
.report-menu-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}
.menu-tag {
  background: #E8EAF6;
  color: var(--navy);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
}
.report-note {
  font-size: 0.88rem;
  color: #555;
  border-left: 3px solid var(--orange);
  padding-left: 12px;
  line-height: 1.7;
}
.report-highlight-box {
  background: #FFF3E0;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--orange);
  margin-top: 10px;
  display: flex;
  align-items: flex-start;
  gap: 6px;
}

/* ========== REPORT PAGE ========== */
main { background: var(--bg); padding: 60px 20px; }

.members-box {
  background: #E8EAF6;
  border-radius: 8px;
  padding: 14px 18px;
  margin-bottom: 20px;
  font-size: 0.9rem;
}
.members-box strong {
  color: var(--navy);
  display: block;
  margin-bottom: 4px;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}
.members-count {
  display: inline-block;
  background: var(--navy);
  color: var(--white);
  font-weight: 900;
  font-size: 0.8rem;
  padding: 2px 10px;
  border-radius: 10px;
  margin-top: 8px;
}

.video-wrap {
  position: relative;
  padding-top: 56.25%;
  margin: 16px 0;
  border-radius: 10px;
  overflow: hidden;
  background: #000;
}
.video-wrap iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* Markdownレンダリング出力 */
.md-content { margin-top: 16px; font-size: 0.92rem; color: #444; line-height: 1.9; }
.md-content h2 {
  font-size: 1rem;
  font-weight: 900;
  color: var(--navy);
  margin: 24px 0 10px;
  padding-bottom: 4px;
  border-bottom: 2px solid #E8EAF6;
}
.md-content h3 {
  font-size: 0.92rem;
  font-weight: 900;
  color: var(--orange);
  margin: 16px 0 6px;
}
.md-content p { margin-bottom: 10px; }
.md-content ul { padding-left: 1.4em; margin-bottom: 10px; }
.md-content li { margin-bottom: 4px; }
.md-content strong { color: var(--navy); }
.md-content hr { border: none; border-top: 1px solid #EEE; margin: 20px 0; }
.md-content blockquote {
  background: #FFF3E0;
  border-left: 3px solid var(--orange);
  padding: 10px 14px;
  border-radius: 0 8px 8px 0;
  color: var(--orange);
  font-weight: 700;
  margin: 12px 0;
}

.page-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 32px;
  flex-wrap: wrap;
  gap: 10px;
}
.page-nav a {
  color: var(--navy);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 700;
}
.page-nav a:hover { color: var(--orange); }

/* ========== FOOTER ========== */
footer {
  background: var(--navy);
  color: rgba(255,255,255,0.7);
  text-align: center;
  padding: 32px 20px;
  font-size: 0.85rem;
}
footer a { color: var(--orange-light); text-decoration: none; }
.footer-contact {
  font-size: 1rem;
  color: var(--white);
  font-weight: 700;
  margin-bottom: 8px;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
  nav { gap: 12px; }
  nav a { font-size: 0.78rem; }
}
@media (max-width: 480px) {
  .logo { font-size: 0.95rem; }
  nav { display: none; }
}