/* ===== CSS Variables & Reset ===== */
:root {
  --primary: #0a7e8c;
  --primary-dark: #065a64;
  --primary-light: #0fb8cc;
  --accent: #00c9db;
  --dark: #1a2332;
  --dark-light: #2a3a4e;
  --text: #333;
  --text-light: #666;
  --text-muted: #999;
  --bg: #ffffff;
  --bg-alt: #f5f8fa;
  --bg-highlight: linear-gradient(135deg, #0a7e8c 0%, #065a64 50%, #1a2332 100%);
  --border: #e2e8f0;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --radius: 8px;
  --radius-lg: 16px;
  --transition: 0.3s ease;
  --font-main: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

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

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

a:hover {
  color: var(--primary-dark);
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Top Bar ===== */
.top-bar {
  background: var(--dark);
  color: #fff;
  padding: 8px 0;
  font-size: 13px;
}

.top-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.top-contact a {
  color: rgba(255,255,255,0.8);
  font-size: 13px;
}

.top-contact a:hover {
  color: #fff;
}

.top-contact i {
  margin-right: 6px;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lang-btn {
  background: none;
  border: 1px solid rgba(255,255,255,0.3);
  color: rgba(255,255,255,0.7);
  padding: 3px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  font-family: var(--font-main);
  transition: all var(--transition);
}

.lang-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.lang-btn:hover {
  border-color: var(--accent);
  color: #fff;
}

.lang-divider {
  color: rgba(255,255,255,0.3);
}

/* ===== Navbar ===== */
.navbar {
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 1px 8px rgba(0,0,0,0.06);
  transition: box-shadow var(--transition);
}

.navbar.scrolled {
  box-shadow: 0 2px 16px rgba(0,0,0,0.1);
}

.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav-logo {
  display: flex;
  align-items: center;
}

.logo-img {
  height: 45px;
  width: auto;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 4px;
}

.nav-links a {
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius);
  transition: all var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
  background: rgba(10, 126, 140, 0.06);
}

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #e8f4f6 0%, #f0f9fa 30%, #ffffff 60%, #e8f4f6 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(10, 126, 140, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 30%, rgba(0, 201, 219, 0.06) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  text-align: center;
  padding: 60px 24px;
}

.hero-logo {
  width: 280px;
  margin-bottom: 30px;
  filter: drop-shadow(0 4px 20px rgba(10, 126, 140, 0.15));
}

.hero h1 {
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--dark);
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-light);
  font-weight: 300;
  max-width: 600px;
  margin: 0 auto 40px;
}

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

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  font-family: var(--font-main);
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  text-align: center;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(10, 126, 140, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

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

.btn-small {
  padding: 8px 20px;
  font-size: 13px;
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.btn-small:hover {
  background: var(--primary-dark);
  color: #fff;
}

.btn-full {
  width: 100%;
}

/* ===== Sections ===== */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section-highlight {
  background: var(--bg-highlight);
  color: #fff;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  color: var(--dark);
  margin-bottom: 8px;
}

.section-title.light {
  color: #fff;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 400;
  margin-bottom: 50px;
}

.section-subtitle.light {
  color: rgba(255,255,255,0.7);
}

/* ===== About ===== */
.about-grid {
  display: grid;
  gap: 50px;
}

.about-text p {
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--text-light);
  margin-bottom: 20px;
}

.about-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.info-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  text-align: center;
  transition: all var(--transition);
}

.info-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.info-card-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, rgba(10,126,140,0.1), rgba(0,201,219,0.1));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 24px;
  color: var(--primary);
}

.info-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--dark);
}

.info-card p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.6;
}

/* ===== Activities ===== */
.activities-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.activity-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
}

.activity-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.activity-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: #fff;
  margin-bottom: 18px;
}

.activity-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 12px;
}

.activity-card p {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===== Events ===== */
.events-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.event-card {
  display: flex;
  gap: 24px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
}

.event-card:hover {
  box-shadow: var(--shadow);
  border-color: var(--primary-light);
}

.event-date {
  min-width: 80px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: var(--radius);
  padding: 16px 12px;
  color: #fff;
}

.event-month {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.event-day {
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1;
  margin-top: 4px;
}

.event-details h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 8px;
}

.event-meta {
  display: flex;
  gap: 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.event-meta i {
  margin-right: 5px;
  color: var(--primary);
}

.event-details p {
  font-size: 0.95rem;
  color: var(--text-light);
  margin-bottom: 14px;
}

.event-placeholder {
  opacity: 0.7;
  border-style: dashed;
}

/* ===== Reports ===== */
.reports-grid {
  max-width: 800px;
  margin: 0 auto;
  display: grid;
  gap: 20px;
}

.report-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
}

.report-card:hover {
  box-shadow: var(--shadow);
}

.placeholder-card {
  text-align: center;
  border-style: dashed;
  opacity: 0.8;
}

.report-icon {
  font-size: 40px;
  color: var(--primary-light);
  margin-bottom: 16px;
}

.report-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 10px;
}

.report-card p {
  color: var(--text-light);
  font-size: 0.95rem;
}

.report-date {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

/* ===== Team ===== */
.team-grid {
  display: flex;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
}

.team-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  max-width: 380px;
  width: 100%;
  transition: all var(--transition);
}

.team-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.team-avatar {
  font-size: 80px;
  color: var(--primary-light);
  margin-bottom: 16px;
}

.team-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 4px;
}

.team-role {
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 14px;
}

.team-card p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

.team-social a {
  display: inline-flex;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(10,126,140,0.1);
  color: var(--primary);
  font-size: 16px;
  transition: all var(--transition);
}

.team-social a:hover {
  background: var(--primary);
  color: #fff;
}

/* ===== Support ===== */
.support-content {
  max-width: 900px;
  margin: 0 auto;
}

.support-text {
  text-align: center;
  font-size: 1.1rem;
  color: rgba(255,255,255,0.85);
  line-height: 1.8;
  margin-bottom: 40px;
}

.support-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.support-card {
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
}

.support-card:hover {
  background: rgba(255,255,255,0.18);
  transform: translateY(-3px);
}

.support-icon {
  font-size: 32px;
  color: var(--accent);
  margin-bottom: 16px;
}

.support-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.support-card p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.75);
  line-height: 1.6;
  margin-bottom: 20px;
}

.support-card .btn-primary {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.4);
}

.support-card .btn-primary:hover {
  background: #fff;
  color: var(--primary-dark);
  border-color: #fff;
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 50px;
  max-width: 900px;
  margin: 0 auto;
}

.contact-item {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
}

.contact-item > i {
  width: 44px;
  height: 44px;
  background: rgba(10,126,140,0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 18px;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 4px;
}

.contact-item p,
.contact-item a {
  font-size: 0.9rem;
  color: var(--text-light);
}

.contact-form {
  background: var(--bg-alt);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--dark);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: var(--font-main);
  color: var(--text);
  background: #fff;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(10,126,140,0.1);
}

/* ===== Footer ===== */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,0.7);
  padding: 50px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 30px;
}

.footer-logo {
  height: 40px;
  margin-bottom: 12px;
  filter: brightness(0) invert(1) opacity(0.8);
}

.footer-brand p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
}

.footer-links h4 {
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 14px;
}

.footer-links a {
  display: block;
  color: rgba(255,255,255,0.6);
  font-size: 0.85rem;
  margin-bottom: 8px;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px;
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 16px;
    box-shadow: var(--shadow-lg);
    border-top: 1px solid var(--border);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 12px 16px;
    font-size: 15px;
  }

  .hero {
    min-height: 70vh;
  }

  .hero-logo {
    width: 200px;
  }

  .hero h1 {
    font-size: 1.3rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .about-cards {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  .event-card {
    flex-direction: column;
    gap: 16px;
  }

  .event-date {
    flex-direction: row;
    gap: 8px;
    padding: 10px 16px;
    width: fit-content;
  }

  .event-day {
    font-size: 1.2rem;
    margin-top: 0;
  }

  .support-options {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .section {
    padding: 60px 0;
  }

  .top-bar-inner {
    flex-direction: column;
    gap: 6px;
  }
}

@media (max-width: 480px) {
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 280px;
  }
}