/* =====================
   Base & Reset
   ===================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #3a3a3a;
  --color-accent: #6e6e6e;
  --color-accent-light: #999999;
  --color-bg: #f8f8f6;
  --color-bg-alt: #efefed;
  --color-text: #3a3a3a;
  --color-text-muted: #888888;
  --color-border: #d8d8d8;
  --font-sans: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
  --radius: 12px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.14);
  --transition: 0.2s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: opacity var(--transition);
}
a:hover { opacity: 0.75; }

/* =====================
   Header
   ===================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: baseline;
  gap: 8px;
  text-decoration: none;
}

.logo-text {
  font-size: 1.6rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  color: var(--color-primary);
}

.logo-sub {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.nav {
  display: flex;
  gap: 28px;
}

.nav a {
  color: var(--color-text);
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
  padding-bottom: 2px;
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition);
}
.nav a:hover::after { width: 100%; }
.nav a:hover { opacity: 1; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text);
  padding: 4px 8px;
}

/* =====================
   Buttons
   ===================== */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: all var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn-primary:hover {
  background: #c0251c;
  border-color: #c0251c;
  opacity: 1;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.6);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
  opacity: 1;
}

/* =====================
   Hero
   ===================== */
.hero {
  position: relative;
  background: #3a3a3a;
  color: #fff;
  padding: 56px 0 48px;
  overflow: hidden;
  text-align: center;
}

.hero-label {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  margin-bottom: 10px;
}

.hero-title {
  font-size: clamp(2.4rem, 7vw, 4.5rem);
  font-weight: 900;
  letter-spacing: 0.1em;
  line-height: 1;
  margin-bottom: 16px;
  color: #ffffff;
}

.hero-tagline {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.8);
  max-width: 480px;
  margin: 0 auto 28px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-decoration {
  position: absolute;
  top: 50%;
  right: -40px;
  transform: translateY(-50%);
  display: flex;
  gap: 4px;
  pointer-events: none;
  opacity: 0.04;
  font-size: 14vw;
  font-weight: 900;
  letter-spacing: -0.02em;
  user-select: none;
}

/* =====================
   Stats
   ===================== */
.stats {
  background: var(--color-primary);
  padding: 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid rgba(255,255,255,0.1);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 16px;
  border-right: 1px solid rgba(255,255,255,0.1);
  color: #fff;
}
.stat-item:last-child { border-right: none; }

.stat-number {
  font-size: 2.2rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1;
}

.stat-unit {
  font-size: 1rem;
  font-weight: 500;
}

.stat-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.75);
  margin-top: 6px;
}

/* =====================
   Sections
   ===================== */
.section {
  padding: 96px 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 900;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: 56px;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 48px;
  height: 4px;
  background: var(--color-accent);
  border-radius: 2px;
  margin: 16px auto 0;
}

/* =====================
   Announcement Bar
   ===================== */
.announcement-bar {
  background: linear-gradient(135deg, #1a1a1a 0%, #2e2e2e 100%);
  border-bottom: 3px solid #c0251c;
  overflow: hidden;
}

.announcement-track {
  display: flex;
  align-items: center;
  width: max-content;
  padding: 18px 0;
  animation: ticker 22s linear infinite;
}

.announcement-track:hover {
  animation-play-state: paused;
}

@keyframes ticker {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

.announcement-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-shrink: 0;
  white-space: nowrap;
}

.announcement-pipe {
  display: inline-block;
  width: 1px;
  height: 20px;
  background: rgba(255, 255, 255, 0.2);
  flex-shrink: 0;
  margin: 0 40px;
}

.announcement-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #c0251c;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  padding: 5px 14px;
  border-radius: 4px;
  white-space: nowrap;
  flex-shrink: 0;
  position: relative;
  animation: pulse-badge 2.4s ease-in-out infinite;
}

@keyframes pulse-badge {
  0%, 100% { box-shadow: 0 0 0 0 rgba(192, 37, 28, 0.5); }
  50%       { box-shadow: 0 0 0 7px rgba(192, 37, 28, 0); }
}

.announcement-badge--info {
  background: #2a7abf;
  animation: none;
}

.announcement-divider {
  width: 100%;
  height: 1px;
  background: rgba(255, 255, 255, 0.12);
  margin: 14px 0;
}

.announcement-link {
  color: #8ecdf5;
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid rgba(142, 205, 245, 0.4);
  transition: color var(--transition), border-color var(--transition);
}
.announcement-link:hover {
  color: #c6e7fc;
  border-color: #c6e7fc;
  opacity: 1;
}

.announcement-body {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.announcement-meta {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.55);
  font-weight: 500;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.announcement-sep {
  display: inline-block;
  width: 1px;
  height: 16px;
  background: rgba(255, 255, 255, 0.2);
  flex-shrink: 0;
}

.announcement-text {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.9);
  letter-spacing: 0.02em;
}

.announcement-text strong {
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 900;
  letter-spacing: 0.04em;
}

@media (max-width: 680px) {
  .announcement-track {
    animation-duration: 16s;
  }
}

/* =====================
   About
   ===================== */
.about {
  background: var(--color-bg);
}

.about-description {
  font-size: 1.1rem;
  line-height: 2;
  color: var(--color-text);
  text-align: center;
}

/* =====================
   Schedule
   ===================== */
.schedule {
  background: var(--color-bg-alt);
  padding: 80px 0;
}

.schedule-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 560px;
  margin: 0 auto 28px;
}

.schedule-item {
  display: flex;
  align-items: center;
  gap: 24px;
  background: var(--color-bg);
  border-radius: var(--radius);
  padding: 20px 28px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--color-accent);
}

.schedule-month {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  white-space: nowrap;
  min-width: 4.5em;
}

.schedule-detail {
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
}

.schedule-date {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
}

.schedule-dow {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-text-muted);
}

.schedule-dow--sat {
  color: #2a7abf;
}

.schedule-dow--sun {
  color: #c0251c;
}

.schedule-dow--mon {
  color: var(--color-primary);
}

.schedule-time {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.schedule-note {
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.schedule-cta {
  text-align: center;
}

.btn-schedule {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  font-weight: 700;
  padding: 12px 32px;
  border-radius: 8px;
  display: inline-block;
  transition: all var(--transition);
  border: 2px solid var(--color-primary);
}
.btn-schedule:hover {
  background: #555;
  border-color: #555;
  opacity: 1;
  transform: translateY(-1px);
}

/* =====================
   Join
   ===================== */
.join {
  background: var(--color-bg);
}

.join-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.join-message h3,
.join-steps h3 {
  font-size: 1.2rem;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.join-message p {
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.join-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.join-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--color-text);
}

.join-list li::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
}

.step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 20px;
}

.step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 900;
  font-size: 0.9rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.step strong {
  display: block;
  font-size: 0.95rem;
  color: var(--color-text);
  margin-bottom: 4px;
}

.step p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* =====================
   Publications
   ===================== */
.publications {
  background: var(--color-bg-alt);
}

.publications-lead {
  text-align: center;
  color: var(--color-text-muted);
  margin-top: -36px;
  margin-bottom: 40px;
  font-size: 0.95rem;
}

.pub-platform {
  margin-bottom: 56px;
}
.pub-platform:last-child {
  margin-bottom: 0;
}

.pub-platform-name {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 10px;
  margin-bottom: 28px;
}

.pub-group {
  margin-bottom: 32px;
}
.pub-group:last-child {
  margin-bottom: 0;
}

.pub-shop-name {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 8px;
  margin-bottom: 16px;
}

.publications-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.pub-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
  background: var(--color-bg);
  border: 2px solid transparent;
  border-radius: var(--radius);
  padding: 0;
  color: var(--color-text);
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  overflow: hidden;
}

.pub-thumb {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  display: block;
  background: var(--color-bg-alt);
}

.pub-title,
.pub-price {
  padding: 0 16px;
}

.pub-title {
  padding-top: 12px;
}

.pub-price {
  padding-bottom: 14px;
}

.pub-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
  opacity: 1;
}

.pub-title {
  font-size: 0.925rem;
  line-height: 1.6;
  color: var(--color-primary);
  font-weight: 600;
}

.pub-price {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-accent);
  align-self: flex-end;
}

.pub-free {
  color: var(--color-text-muted);
}

.pub-library {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 32px;
}

.pub-library-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin-bottom: 20px;
}

.pub-library-list li {
  font-size: 0.925rem;
  color: var(--color-text);
  padding-left: 12px;
  position: relative;
}

.pub-library-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-accent-light);
}

.pub-library-note {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.pub-library-link {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 2px;
  transition: opacity var(--transition);
}

.pub-library-link:hover {
  opacity: 0.6;
}

/* =====================
   Contact
   ===================== */
.contact {
  background: var(--color-bg-alt);
}

.contact-grid {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--color-bg);
  padding: 28px 36px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: var(--color-text);
  min-width: 280px;
  transition: all var(--transition);
  border: 2px solid transparent;
}

.contact-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
  opacity: 1;
}

.contact-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.x-icon {
  background: #000;
  color: #fff;
  font-size: 1.2rem;
  font-weight: 900;
  font-family: Georgia, serif;
}

.mail-icon {
  background: var(--color-primary);
  color: #fff;
  font-size: 1.4rem;
}

.wiki-icon {
  background: #6e6e6e;
  color: #fff;
  font-size: 1.3rem;
}

.contact-card strong {
  display: block;
  font-size: 1rem;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.contact-card span {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* =====================
   Footer
   ===================== */
.site-footer {
  background: var(--color-primary);
  color: rgba(255,255,255,0.6);
  padding: 40px 0;
  text-align: center;
}

.footer-logo {
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  color: #fff;
  margin-bottom: 8px;
}

.footer-copy {
  font-size: 0.8rem;
}

/* =====================
   Scroll Animations
   ===================== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =====================
   Responsive
   ===================== */
@media (max-width: 900px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat-item:nth-child(2) { border-right: none; }
  .stat-item:nth-child(3) { border-right: 1px solid rgba(255,255,255,0.1); }
  .stat-item:nth-child(3),
  .stat-item:nth-child(4) {
    border-top: 1px solid rgba(255,255,255,0.1);
  }

  .join-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .publications-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 680px) {
  .nav { display: none; }
  .nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    padding: 16px 24px;
    gap: 16px;
    box-shadow: var(--shadow);
    z-index: 99;
  }
  .nav-toggle { display: block; }

  .activities-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero {
    padding: 40px 0 36px;
  }

  .hero-decoration {
    font-size: 20vw;
    opacity: 0.03;
    right: -20px;
  }

  .section {
    padding: 72px 0;
  }

  .contact-card {
    min-width: 0;
    width: 100%;
  }

  .publications-grid {
    grid-template-columns: 1fr;
  }
}

/* =====================
   Contact Form Button
   ===================== */
.contact-card--form {
  background: var(--color-bg);
  font-family: var(--font-sans);
  text-align: left;
  cursor: pointer;
}

.form-icon {
  background: var(--color-primary);
  color: #fff;
  font-size: 1.2rem;
}

/* =====================
   Modal
   ===================== */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal[hidden] {
  display: none;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
}

.modal-content {
  position: relative;
  background: var(--color-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 36px;
  animation: modal-in 0.2s ease;
}

@keyframes modal-in {
  from { opacity: 0; transform: translateY(12px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--color-accent);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: background var(--transition), color var(--transition);
}

.modal-close:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

/* =====================
   Contact Form
   ===================== */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.form-required {
  font-size: 0.7rem;
  color: #c0392b;
  background: #fdecea;
  padding: 1px 6px;
  border-radius: 4px;
  font-weight: 600;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.95rem;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: #fff;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(58, 58, 58, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.form-charcount {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-align: right;
  margin-top: 4px;
}

.form-status {
  font-size: 0.9rem;
  padding: 12px 16px;
  border-radius: var(--radius);
  display: none;
}

.form-status.success {
  display: block;
  background: #eaf7f0;
  color: #1a7a4a;
  border: 1.5px solid #a8e6c3;
}

.form-status.error {
  display: block;
  background: #fdecea;
  color: #c0392b;
  border: 1.5px solid #f5b7b1;
}

.form-submit {
  align-self: flex-start;
  padding: 14px 36px;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  position: relative;
}

.form-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

@media (max-width: 600px) {
  .modal-content {
    padding: 24px 20px;
  }
  .form-submit {
    width: 100%;
    text-align: center;
  }
}

/* =====================
   Records
   ===================== */
.records-lead {
  color: var(--color-text-muted);
  font-size: 1rem;
  margin-bottom: 28px;
  text-align: center;
}

.records-btn {
  display: block;
  width: fit-content;
  margin: 0 auto;
  font-size: 1rem;
}