:root {
  --primary: #1a5276;
  --primary-light: #2980b9;
  --primary-dark: #0e2f44;
  --accent: #27ae60;
  --bg: #f5f6f8;
  --bg-white: #ffffff;
  --text: #333333;
  --text-light: #666666;
  --border: #dee2e6;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --radius: 8px;
}

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

body {
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 2;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary-light); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary-dark); }

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

/* Header */
.site-header {
  background: var(--bg-white);
  border-bottom: 3px solid var(--primary);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.header-top {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.5;
}

.site-logo small {
  display: block;
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
}

.header-contact {
  font-size: 14px;
  color: var(--text-light);
  text-align: right;
}

/* Navigation */
.main-nav {
  background: var(--primary);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  position: relative;
}

.nav-item {
  position: relative;
}

.nav-item > a {
  display: block;
  padding: 14px 20px;
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.5px;
  transition: background 0.2s;
}

.nav-item > a:hover,
.nav-item.active > a {
  background: var(--primary-light);
  color: #fff;
}

.nav-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--bg-white);
  min-width: 240px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
  border-radius: 0 0 var(--radius) var(--radius);
  z-index: 200;
}

.nav-item:hover .nav-dropdown {
  display: block;
}

.nav-dropdown a {
  display: block;
  padding: 12px 20px;
  color: var(--text);
  font-size: 14px;
  border-bottom: 1px solid var(--border);
  line-height: 1.6;
}

.nav-dropdown a:last-child { border-bottom: none; }
.nav-dropdown a:hover { background: var(--bg); color: var(--primary); }

/* Mobile nav */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 28px;
  cursor: pointer;
  padding: 12px 20px;
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-inner {
    flex-direction: column;
    display: none;
    padding: 0;
  }
  .nav-inner.open { display: flex; }
  .nav-item > a { padding: 14px 20px; border-bottom: 1px solid rgba(255,255,255,0.1); }
  .nav-dropdown {
    position: static;
    box-shadow: none;
    border-radius: 0;
  }
  .nav-dropdown a { padding-left: 40px; }
  .nav-item:hover .nav-dropdown { display: none; }
  .nav-item.mobile-open .nav-dropdown { display: block; }
  .header-top { flex-direction: column; text-align: center; gap: 4px; }
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  padding: 60px 20px;
  text-align: center;
}

.hero h1 {
  font-size: 28px;
  margin-bottom: 12px;
  font-weight: 700;
}

.hero p {
  font-size: 16px;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

/* Hero with video background */
.hero-video {
  position: relative;
  overflow: hidden;
  padding: 0;
  min-height: 450px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-video-bg {
  position: absolute;
  top: 50%;
  left: 50%;
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  transform: translate(-50%, -50%);
  object-fit: cover;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 40, 70, 0.55);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 70px 20px;
}

.hero-sub {
  font-size: 13px;
  letter-spacing: 6px;
  text-transform: uppercase;
  opacity: 0.7;
  margin-bottom: 12px;
  font-weight: 400;
}

.hero-content h1 {
  font-family: "Noto Serif JP", serif;
  font-size: 32px;
  margin-bottom: 0;
  font-weight: 300;
  letter-spacing: 4px;
  line-height: 1.6;
  text-shadow: 0 2px 12px rgba(0,0,0,0.5);
}

.hero-line1 {
  font-weight: 300;
  font-size: 28px;
  letter-spacing: 6px;
}

.hero-line2 {
  font-weight: 600;
  font-size: 36px;
  letter-spacing: 3px;
}

.hero-divider {
  width: 60px;
  height: 2px;
  background: rgba(255,255,255,0.6);
  margin: 24px auto;
}

.hero-motto {
  font-size: 15px;
  opacity: 0.85;
  max-width: 600px;
  margin: 0 auto;
  letter-spacing: 3px;
  font-weight: 300;
  text-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

@media (max-width: 768px) {
  .hero-video { min-height: 300px; }
  .hero-content h1 { font-size: 22px; }
  .hero-content p { font-size: 15px; }
  .hero-line1 { font-size: 20px; }
  .hero-line2 { font-size: 26px; }
}

/* Content */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 48px 24px;
}

.page-header {
  border-bottom: 3px solid var(--primary);
  padding-bottom: 14px;
  margin-bottom: 36px;
}

.page-header h1 {
  font-size: 26px;
  color: var(--primary);
  font-weight: 700;
  letter-spacing: 1px;
}

.breadcrumb {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 24px;
}

.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--primary); }

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
  margin: 36px 0;
}

.card {
  background: var(--bg-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
  border: 1px solid var(--border);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}

.card-body { padding: 28px; }

.card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 14px;
  display: block;
}

.card-body h3 {
  font-size: 20px;
  color: var(--primary);
  margin-bottom: 10px;
  font-weight: 700;
}

.card-body p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.8;
}

.card-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 768px) {
  .card-grid-3 { grid-template-columns: 1fr; }
}

/* Staff */
.staff-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}

.staff-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  text-align: center;
  border: 1px solid var(--border);
}

.staff-photo {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 10%;
  margin: 0 auto 18px;
  display: block;
  border: 3px solid var(--border);
}

.staff-photo-placeholder {
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: 48px;
}

.staff-card h3 {
  font-size: 20px;
  color: var(--primary);
  margin-bottom: 4px;
  font-weight: 700;
}

.staff-card .position {
  font-size: 15px;
  color: var(--primary-light);
  font-weight: 600;
  margin-bottom: 8px;
}

.staff-card .en-name {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}

.staff-card .qualifications {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.8;
  text-align: left;
}

/* Schedule table */
.schedule-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  margin: 16px 0;
  table-layout: auto;
}

@media (max-width: 768px) {
  .schedule-table { font-size: 13px; overflow-x: auto; display: block; }
}

.schedule-table th {
  background: var(--primary);
  color: #fff;
  padding: 14px 20px;
  font-size: 14px;
  font-weight: 500;
  text-align: left;
  white-space: nowrap;
}

.schedule-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  line-height: 1.8;
}

.schedule-table td:first-child {
  white-space: nowrap;
}

.schedule-table tr:last-child td { border-bottom: none; }
.schedule-table tr:hover td { background: #f0f7ff; }

/* Timeline */
.timeline {
  position: relative;
  padding-left: 30px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  margin-bottom: 24px;
  padding-left: 20px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -26px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--primary);
}

.timeline-year {
  font-weight: 700;
  color: var(--primary);
  font-size: 15px;
}

.timeline-text {
  font-size: 15px;
  color: var(--text);
}

/* News */
.news-list { list-style: none; }

.news-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 20px;
  align-items: baseline;
}

.news-date {
  font-size: 14px;
  color: var(--text-light);
  white-space: nowrap;
  font-weight: 500;
}

.news-title a {
  font-size: 16px;
  color: var(--text);
}

.news-title a:hover { color: var(--primary); }

/* Section */
.content-section {
  background: var(--bg-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 36px;
  margin-bottom: 28px;
  border: 1px solid var(--border);
}

.content-section h2 {
  font-size: 22px;
  color: var(--primary);
  border-left: 4px solid var(--primary);
  padding-left: 14px;
  margin-bottom: 20px;
  font-weight: 700;
  line-height: 1.5;
}

.content-section h3 {
  font-size: 18px;
  color: var(--primary-dark);
  margin: 28px 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}

.content-section p {
  margin-bottom: 16px;
}

.content-section ul,
.content-section ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

.content-section li {
  margin-bottom: 6px;
}

/* Footer */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.8);
  padding: 48px 24px;
  margin-top: 48px;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 28px;
}

.footer-info h3 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 10px;
}

.footer-info p {
  font-size: 14px;
  line-height: 2;
}

.footer-bottom {
  max-width: 1100px;
  margin: 28px auto 0;
  padding-top: 18px;
  border-top: 1px solid rgba(255,255,255,0.2);
  font-size: 12px;
  text-align: center;
}

/* Home sections */
.home-sections {
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 24px;
}

.home-news {
  background: var(--bg-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 36px;
  margin-bottom: 36px;
  border: 1px solid var(--border);
}

.home-news h2 {
  font-size: 22px;
  color: var(--primary);
  margin-bottom: 18px;
  border-bottom: 3px solid var(--primary);
  padding-bottom: 10px;
  font-weight: 700;
}

.section-link {
  display: inline-block;
  margin-top: 16px;
  padding: 10px 24px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  transition: background 0.2s;
}

.section-link:hover { background: var(--primary-light); color: #fff; }

/* Prose content */
.prose p { margin-bottom: 18px; }
.prose ul, .prose ol { margin-bottom: 18px; padding-left: 28px; }
.prose li { margin-bottom: 6px; }
.prose strong { color: var(--primary-dark); }
.prose hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

/* Contact form */
.contact-form { max-width: 600px; }
.form-group { margin-bottom: 24px; }
.form-group label {
  display: block;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
}
.form-group .required {
  color: #e74c3c;
  font-size: 12px;
  margin-left: 4px;
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.2s;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary-light);
  outline: none;
  box-shadow: 0 0 0 3px rgba(41,128,185,0.1);
}
.form-group textarea { min-height: 160px; resize: vertical; }
.btn-submit {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 14px 36px;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}
.btn-submit:hover { background: var(--primary-light); }

/* Tabs */
.tab-container { margin-top: 8px; }

.tab-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.tab-btn {
  padding: 10px 20px;
  border: 2px solid var(--primary);
  background: var(--bg-white);
  color: var(--primary);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.tab-btn:hover {
  background: var(--bg);
}

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

.presenter {
  display: inline-block;
  color: var(--primary);
  font-weight: 600;
  margin-left: 8px;
}

@media (max-width: 768px) {
  .tab-buttons { gap: 6px; }
  .tab-btn { padding: 8px 14px; font-size: 13px; }
}