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

:root {
  --primary: #1a5276;
  --accent: #2e86c1;
  --light: #eaf4fb;
  --text: #2c3e50;
  --muted: #7f8c8d;
  --white: #ffffff;
  --border: #d5e8f3;
  --max-width: 960px;
}

body {
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  color: var(--text);
  line-height: 1.8;
  font-size: 15px;
}

a { color: inherit; text-decoration: none; }

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

/* Header */
header {
  background: var(--white);
  border-bottom: 2px solid var(--primary);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo-wrap {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.logo-ja {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.05em;
}

.logo-en {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.03em;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 30px;
}

nav a {
  font-size: 13px;
  color: var(--text);
  font-weight: 500;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s, color 0.2s;
}

nav a:hover,
nav a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: var(--white);
  padding: 80px 20px;
  text-align: center;
}

.hero-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.15em;
  border: 1px solid rgba(255,255,255,0.6);
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.6;
  margin-bottom: 20px;
}

.hero p {
  font-size: 15px;
  opacity: 0.9;
  max-width: 560px;
  margin: 0 auto 36px;
}

.btn {
  display: inline-block;
  background: var(--white);
  color: var(--primary);
  font-weight: 700;
  font-size: 14px;
  padding: 12px 32px;
  border-radius: 4px;
  transition: opacity 0.2s;
}

.btn:hover { opacity: 0.85; }

/* Page Header */
.page-header {
  background: var(--light);
  padding: 40px 20px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  font-size: 24px;
  color: var(--primary);
  font-weight: 700;
}

.page-header p {
  font-size: 13px;
  color: var(--muted);
  margin-top: 6px;
  letter-spacing: 0.1em;
}

/* Sections */
section {
  padding: 64px 20px;
}

section:nth-of-type(even) {
  background: var(--light);
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}

.section-sub {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.1em;
  margin-bottom: 36px;
}

/* Greeting */
.greeting-text {
  font-size: 15px;
  line-height: 2;
  max-width: 720px;
}

/* About Table */
.about-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 24px;
}

.about-table th,
.about-table td {
  padding: 14px 20px;
  border: 1px solid var(--border);
  font-size: 14px;
  text-align: left;
  vertical-align: top;
}

.about-table th {
  background: var(--light);
  color: var(--primary);
  font-weight: 600;
  width: 160px;
  white-space: nowrap;
}

/* Activities Grid */
.activities-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 32px;
}

.activity-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: 4px;
  padding: 24px 20px;
}

.activity-card .num {
  font-size: 11px;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.activity-card h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}

.activity-card p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.8;
}

/* CTA Section */
.cta-section {
  background: var(--primary);
  color: var(--white);
  text-align: center;
  padding: 60px 20px;
}

.cta-section h2 {
  font-size: 20px;
  margin-bottom: 12px;
}

.cta-section p {
  font-size: 14px;
  opacity: 0.85;
  margin-bottom: 28px;
}

.btn-outline {
  display: inline-block;
  border: 2px solid var(--white);
  color: var(--white);
  font-weight: 700;
  font-size: 14px;
  padding: 11px 32px;
  border-radius: 4px;
  transition: background 0.2s, color 0.2s;
}

.btn-outline:hover {
  background: var(--white);
  color: var(--primary);
}

/* Contact */
.privacy-box {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 24px 28px;
  margin-bottom: 36px;
}

.privacy-box h3 {
  font-size: 14px;
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 16px;
}

.privacy-box ol {
  padding-left: 20px;
}

.privacy-box li {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 8px;
  line-height: 1.8;
}

.contact-form {
  max-width: 640px;
}

.form-row {
  margin-bottom: 20px;
}

.form-row label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 6px;
}

.form-row label span.required {
  color: #e74c3c;
  font-size: 11px;
  margin-left: 4px;
}

.form-row input,
.form-row textarea,
.form-row select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  transition: border-color 0.2s;
  background: var(--white);
}

.form-row input:focus,
.form-row textarea:focus,
.form-row select:focus {
  outline: none;
  border-color: var(--accent);
}

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

.submit-btn {
  display: block;
  width: 100%;
  max-width: 320px;
  margin: 28px auto 0;
  background: var(--primary);
  color: var(--white);
  font-size: 15px;
  font-weight: 700;
  padding: 13px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s;
}

.submit-btn:hover { background: var(--accent); }

/* Footer */
footer {
  background: var(--text);
  color: rgba(255,255,255,0.75);
  padding: 40px 20px 24px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(255,255,255,0.15);
  margin-bottom: 20px;
}

.footer-logo {
  color: var(--white);
  font-weight: 700;
  font-size: 15px;
}

.footer-logo small {
  display: block;
  font-size: 11px;
  color: rgba(255,255,255,0.55);
  font-weight: 400;
  margin-bottom: 4px;
}

.footer-address {
  font-size: 12px;
  line-height: 1.8;
  margin-top: 8px;
  color: rgba(255,255,255,0.6);
}

.footer-nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-nav a {
  font-size: 12px;
  color: rgba(255,255,255,0.65);
  transition: color 0.2s;
}

.footer-nav a:hover { color: var(--white); }

.footer-copy {
  font-size: 11px;
  color: rgba(255,255,255,0.4);
  text-align: center;
}

/* Responsive */
@media (max-width: 640px) {
  .header-inner { height: 56px; }
  .logo-en { font-size: 14px; }
  nav ul { gap: 14px; }
  nav a { font-size: 12px; }
  .hero h1 { font-size: 21px; }
  .activities-grid { grid-template-columns: 1fr; }
  .footer-top { flex-direction: column; gap: 20px; }
  .footer-nav ul { gap: 14px; }
  .about-table th { width: 110px; }
}