/*
 * 過去開催レポート（single-past_event.php）
 *
 * 出典: docs/design_handoff_wordpress/reference/past-event-single.html の <style> を逐語移植。
 * 色・余白・タイポは確定値。参照ごとに :root の値が異なるため統一しない。
 */

:root {
  --bg: #e8f5fb;
  --bg2: #f4f9fd;
  --bg3: #ffffff;
  --gold: #c8a060;
  --red: #e63329;
  --red-dark: #b02020;
  --text: #1a1a2e;
  --text-dim: #5a6a78;
  --border: rgba(90,140,180,0.25);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Serif JP', serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
}
img { max-width: 100%; height: auto; display: block; }

/* NAV */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 3rem; height: 64px;
  background: rgba(232,245,251,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(90,168,200,0.2);
}
.nav-logo img { height: 32px; }
.nav-back {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 0.8rem; color: var(--text-dim);
  text-decoration: none; letter-spacing: 0.1em;
  transition: color 0.2s;
}
.nav-back:hover { color: var(--red); }

/* Nav links */
.nav-links { display: flex; gap: 2rem; list-style: none; align-items: center; }
.nav-links a {
  color: var(--text-dim); text-decoration: none; font-size: 0.8rem;
  font-family: 'Noto Sans JP', sans-serif; font-weight: 500;
  letter-spacing: 0.1em; transition: color 0.2s;
}
.nav-links a:hover { color: var(--red); }
.nav-cta {
  padding: 0.5rem 1.2rem; border: 1px solid var(--red);
  color: var(--red) !important; border-radius: 20px;
}
.hamburger {
  display: none;
  background: none; border: none; cursor: pointer;
  width: 32px; height: 32px;
  padding: 0; position: relative; z-index: 110;
}
.hamburger span {
  display: block; position: absolute;
  left: 4px; right: 4px; height: 2px;
  background: var(--text); border-radius: 1px;
  transition: transform 0.3s, opacity 0.2s, top 0.3s;
}
.hamburger span:nth-child(1) { top: 10px; }
.hamburger span:nth-child(2) { top: 15px; }
.hamburger span:nth-child(3) { top: 20px; }
.hamburger.open span:nth-child(1) { top: 15px; transform: rotate(45deg); background: var(--red); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { top: 15px; transform: rotate(-45deg); background: var(--red); }

/* HERO */
header.page-hero {
  padding: 7rem 2rem 3rem;
  text-align: center;
  background: linear-gradient(180deg, #c2e8f8 0%, #eef8fd 100%);
}
.page-hero-eyebrow {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 0.75rem; font-weight: 500;
  letter-spacing: 0.35em; color: var(--gold);
  margin-bottom: 1rem;
}
.page-hero h1 {
  font-size: 2.4rem; font-weight: 900;
  letter-spacing: 0.08em; margin-bottom: 0.5rem;
}
.page-hero-sub {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 0.95rem; color: var(--text-dim);
  letter-spacing: 0.1em;
}

/* CONTENT */
main {
  max-width: 900px; margin: 0 auto;
  padding: 3rem 2rem 5rem;
}

.lead-photo {
  margin-bottom: 3rem;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(95,168,200,0.2);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 3rem;
}
.stat {
  background: #fff;
  border: 1px solid var(--border);
  padding: 1.5rem 1rem;
  text-align: center;
  border-radius: 4px;
}
.stat-num {
  font-size: 2.4rem; font-weight: 900;
  color: var(--red); line-height: 1;
}
.stat-num small { font-size: 1rem; font-weight: 400; margin-left: 0.2em; }
.stat-label {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 0.75rem; color: var(--text-dim);
  letter-spacing: 0.15em; margin-top: 0.6rem;
}

h2.section-h {
  font-size: 1.5rem; font-weight: 700;
  letter-spacing: 0.1em;
  padding-bottom: 0.8rem; margin: 3rem 0 1.5rem;
  border-bottom: 2px solid var(--gold);
  position: relative;
}
h2.section-h::before {
  content: ''; display: inline-block;
  width: 4px; height: 1.3rem;
  background: var(--red); margin-right: 0.7rem;
  vertical-align: -0.15em;
}

p.body {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 0.95rem; line-height: 2;
  margin-bottom: 1.2rem;
  color: var(--text);
}
p.body strong { color: var(--red); font-weight: 700; }

.info-list {
  background: var(--bg2);
  border-left: 3px solid var(--gold);
  padding: 1.5rem 1.5rem;
  margin: 1.5rem 0 2rem;
  font-family: 'Noto Sans JP', sans-serif;
}
.info-list dt {
  font-size: 0.75rem; color: var(--gold);
  letter-spacing: 0.2em; font-weight: 700;
  margin-bottom: 0.2rem;
}
.info-list dd {
  font-size: 0.95rem;
  margin-bottom: 1rem; color: var(--text);
}
.info-list dd:last-child { margin-bottom: 0; }
.info-list a { color: var(--red); }

/* GALLERY */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  margin: 2rem 0 3rem;
}
.gallery-item {
  aspect-ratio: 4/3;
  overflow: hidden;
  border-radius: 4px;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
}
.gallery-item img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.gallery-item:hover { box-shadow: 0 10px 30px rgba(0,0,0,0.15); }
.gallery-item:hover img { transform: scale(1.06); }

.gallery-item.featured { grid-column: span 2; grid-row: span 2; aspect-ratio: 1; }

/* LIGHTBOX */
.lightbox {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,0.92);
  display: none; align-items: center; justify-content: center;
  cursor: pointer; padding: 2rem;
}
.lightbox.active { display: flex; }
.lightbox img { max-width: 95vw; max-height: 90vh; border-radius: 4px; }
.lightbox-close {
  position: absolute; top: 1.5rem; right: 2rem;
  color: #fff; font-size: 2rem; cursor: pointer;
  background: none; border: none;
}

/* CTA */
.cta-wrap {
  margin-top: 4rem;
  padding: 2.5rem 2rem;
  text-align: center;
  background: linear-gradient(135deg, var(--bg2), var(--bg));
  border: 1px solid var(--border);
  border-radius: 6px;
}
.cta-wrap h3 {
  font-size: 1.5rem; font-weight: 700;
  letter-spacing: 0.08em; margin-bottom: 0.6rem;
}
.cta-wrap p {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 0.85rem; color: var(--text-dim);
  margin-bottom: 1.5rem;
}
.cta-btn {
  display: inline-block;
  padding: 0.9rem 2.5rem;
  background: linear-gradient(135deg, #f04040, var(--red));
  color: #fff;
  font-family: 'Noto Sans JP', sans-serif; font-weight: 700;
  letter-spacing: 0.2em; font-size: 0.85rem;
  text-decoration: none; border-radius: 2px;
  box-shadow: 0 4px 20px rgba(230,51,41,0.3);
  transition: transform 0.15s;
}
.cta-btn:hover { transform: translateY(-2px); }

/* FOOTER */
footer {
  background: #020810;
  padding: 2rem;
  text-align: center;
}
footer p {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 0.7rem; color: var(--text-dim);
  letter-spacing: 0.15em;
}

@media (max-width: 768px) {
  nav { padding: 0 1rem; }
  .hamburger { display: block; }
  .nav-back { display: none; }
  .nav-links {
    position: fixed;
    top: 64px; left: 0; right: 0;
    background: rgba(232,245,251,0.98);
    backdrop-filter: blur(12px);
    flex-direction: column; gap: 0;
    padding: 1rem 1.5rem 2rem;
    border-bottom: 1px solid rgba(90,168,200,0.2);
    transform: translateY(-110%);
    transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    align-items: stretch;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links li {
    width: 100%;
    border-bottom: 1px solid rgba(90,168,200,0.15);
    list-style: none;
  }
  .nav-links li:last-child { border-bottom: none; }
  .nav-links a {
    display: block;
    padding: 1rem 0.5rem;
    font-size: 0.95rem; letter-spacing: 0.15em;
  }
  .nav-links .nav-cta {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.7rem 1.5rem;
  }
  .page-hero { padding: 5rem 1rem 2rem; }
  .page-hero h1 { font-size: 1.6rem; }
  main { padding: 2rem 1rem 3rem; }
  .stats { grid-template-columns: repeat(3, 1fr); gap: 0.5rem; }
  .stat { padding: 1rem 0.5rem; }
  .stat-num { font-size: 1.6rem; }
  .stat-label { font-size: 0.65rem; letter-spacing: 0.1em; }
  .gallery { grid-template-columns: repeat(2, 1fr); gap: 0.4rem; }
  .gallery-item.featured { grid-column: span 2; grid-row: span 1; aspect-ratio: 4/3; }
  h2.section-h { font-size: 1.2rem; }
}