/* ============================================
   Harmonized Interactions - Corporate Site
   ============================================ */

:root {
  --primary: #1A5F8B;
  --primary-dark: #134A6E;
  --secondary: #3AAFDA;
  --secondary-light: #6CC4E4;
  --text: #333333;
  --text-light: #555555;
  --text-muted: #888888;
  --bg-white: #FFFFFF;
  --bg-light: #F5F7FA;
  --bg-dark: #1A2332;
  --border: #E0E4E8;
  --shadow: rgba(26, 95, 139, 0.1);
  --font-ja: 'Noto Sans JP', sans-serif;
  --font-en: 'Noto Sans', sans-serif;
  --max-width: 1100px;
  --header-height: 72px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: var(--header-height); }

body {
  font-family: var(--font-ja);
  color: var(--text);
  line-height: 1.8;
  background: var(--bg-white);
  -webkit-font-smoothing: antialiased;
}

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

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

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ---- Header ---- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-height);
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-logo img { height: 40px; width: auto; }

.header-nav { display: flex; align-items: center; gap: 8px; }

.header-nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-light);
  padding: 8px 14px;
  border-radius: 6px;
  transition: background 0.2s, color 0.2s;
}

.header-nav a:hover,
.header-nav a.active {
  color: var(--primary);
  background: var(--bg-light);
}

.lang-switch {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  border: 1.5px solid var(--primary);
  padding: 5px 12px;
  border-radius: 20px;
  margin-left: 8px;
  transition: background 0.2s, color 0.2s;
}

.lang-switch:hover {
  background: var(--primary);
  color: #fff;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ---- Hero ---- */
.hero {
  padding: 160px 0 100px;
  background: linear-gradient(135deg, var(--bg-light) 0%, #E8F4FD 100%);
  text-align: center;
}

.hero-logo { max-width: 200px; margin: 0 auto 32px; }

.hero h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary-dark);
  line-height: 1.5;
  margin-bottom: 20px;
}

.hero p {
  font-size: 16px;
  color: var(--text-light);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.9;
}

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

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

.section-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 48px;
}

.section-lead {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 40px;
  line-height: 1.9;
}

/* ---- Company Info Table ---- */
.info-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 48px;
}

.info-table th,
.info-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  font-size: 15px;
  vertical-align: top;
}

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

/* ---- Member Cards ---- */
.members-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(480px, 1fr));
  gap: 28px;
}

.member-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  transition: box-shadow 0.3s;
}

.member-card:hover {
  box-shadow: 0 8px 24px var(--shadow);
}

.member-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 4px;
}

.member-name-en {
  font-size: 13px;
  color: var(--text-muted);
  font-family: var(--font-en);
  margin-bottom: 8px;
}

.member-role {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: #E8F4FD;
  padding: 3px 10px;
  border-radius: 12px;
  margin-bottom: 12px;
}

.member-affiliation {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.member-desc {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.8;
}

/* ---- Business Cards ---- */
.business-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.business-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  transition: box-shadow 0.3s, transform 0.3s;
}

.business-card:hover {
  box-shadow: 0 8px 24px var(--shadow);
  transform: translateY(-2px);
}

.business-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 24px;
  color: #fff;
}

.business-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 10px;
}

.business-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ---- Technology ---- */
.tech-category {
  margin-bottom: 40px;
}

.tech-category h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--secondary);
  display: inline-block;
}

.tech-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  list-style: none;
}

.tech-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  transition: box-shadow 0.3s;
}

.tech-item:hover {
  box-shadow: 0 4px 16px var(--shadow);
}

.tech-item strong {
  display: block;
  font-size: 16px;
  color: var(--primary-dark);
  margin-bottom: 4px;
}

.tech-item span {
  font-size: 13px;
  color: var(--text-muted);
}

/* ---- Contact ---- */
.contact-box {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 48px 40px;
}

.contact-box p {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 24px;
  line-height: 1.8;
}

.contact-email {
  display: inline-block;
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
  background: var(--bg-light);
  padding: 12px 28px;
  border-radius: 8px;
  font-family: var(--font-en);
}

/* ---- Footer ---- */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.6);
  padding: 40px 0;
  text-align: center;
  font-size: 13px;
}

.footer-logo { max-width: 160px; margin: 0 auto 16px; filter: brightness(0) invert(1); opacity: 0.7; }

.site-footer a { color: rgba(255,255,255,0.8); }
.site-footer a:hover { color: #fff; }

/* ---- Page Header ---- */
.page-header {
  padding: 120px 0 48px;
  background: linear-gradient(135deg, var(--bg-light) 0%, #E8F4FD 100%);
}

.page-header h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 8px;
}

.page-header p {
  font-size: 15px;
  color: var(--text-muted);
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  :root { --header-height: 60px; }

  .hamburger { display: flex; }

  .header-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0; right: 0;
    background: var(--bg-white);
    flex-direction: column;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 24px var(--shadow);
  }

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

  .header-nav a { padding: 12px 0; font-size: 15px; }

  .lang-switch { margin: 8px 0 0; align-self: flex-start; }

  .hero { padding: 120px 0 64px; }
  .hero h1 { font-size: 22px; }
  .hero p { font-size: 14px; }

  .section { padding: 56px 0; }
  .section-title { font-size: 24px; }

  .members-grid { grid-template-columns: 1fr; }
  .business-grid { grid-template-columns: 1fr; }
  .tech-list { grid-template-columns: 1fr; }

  .info-table th { width: 120px; font-size: 13px; }
  .info-table td { font-size: 14px; }

  .page-header { padding: 100px 0 36px; }
  .page-header h1 { font-size: 26px; }

  .contact-box { padding: 32px 24px; }
}

@media (max-width: 480px) {
  .info-table th,
  .info-table td {
    display: block;
    width: 100%;
  }
  .info-table th { border-bottom: none; padding-bottom: 4px; }
  .info-table td { padding-top: 0; }
}