:root {
  --bg: #060b16;
  --bg-alt: #101b2f;
  --text: #f2f6ff;
  --muted: #c1cce6;
  --primary: #6cb6ff;
  --primary-dark: #2d7dd2;
  --card: #14233e;
  --border: #2b3f67;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

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

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

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(6, 11, 22, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

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

.logo {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
}

.nav-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.nav-list a {
  text-decoration: none;
  color: var(--muted);
}

.hero {
  padding: 72px 0 48px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  align-items: center;
  gap: 36px;
}

.eyebrow {
  color: var(--primary);
  font-weight: 700;
  letter-spacing: 0.04em;
}

h1,
h2,
h3 {
  line-height: 1.3;
  margin-top: 0;
}

h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
}

.section {
  padding: 56px 0;
}

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

.grid {
  display: grid;
  gap: 20px;
}

.two-cols {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.three-cols {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
}

.button-group {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--text);
  text-decoration: none;
}

.button.primary {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}

.hero-image {
  border-radius: 16px;
  border: 1px solid var(--border);
}

.timeline {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.timeline li {
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #0b1529;
}

.date {
  color: var(--primary);
  font-weight: 700;
}

.text-link {
  font-weight: 700;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px 0;
}

@media (max-width: 800px) {
  .hero-grid,
  .two-cols,
  .three-cols {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 40px;
  }
}


table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  border-bottom: 1px solid var(--border);
  padding: 10px;
  text-align: left;
}

code {
  background: #0b1529;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 6px;
}

.lang-switch {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.lang-button {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
}

.lang-button.active {
  color: var(--text);
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}