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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #f9fafb;
  background: #020617;
  min-height: 100vh;
}

/* 背景動画（画面全体・常に背面・操作不可） */
.bg-video {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
  filter: grayscale(0.3) contrast(1.1) brightness(0.6);
  pointer-events: none; /* クリックしても反応させない → コントローラも出ない */
}

/* 暗くするオーバーレイ */
.overlay {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at top, rgba(15, 23, 42, 0.2), rgba(15, 23, 42, 0.6)),
    linear-gradient(to bottom, rgba(15, 23, 42, 0.95), rgba(2, 6, 23, 0.1));
}

/* 全体ラッパー */
.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ヘッダー */
header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 10;
  padding: 10px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(10px);
  background: rgba(15, 23, 42, 0.65);
  border-bottom: 1px solid rgba(51, 65, 85, 0.9);
}

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

.logo-mark {
  width: 30px;
  height: 30px;
  border-radius: 10px;
  background: linear-gradient(135deg, #22d3ee, #7c3aed);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
}

.logo-text {
  font-size: 12px;
  line-height: 1.2;
}

.logo-text span {
  display: block;
}

.logo-text .title {
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.logo-text .subtitle {
  font-size: 11px;
  color: #9ca3af;
}

.nav-cta {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  border-radius: 999px;
  padding: 7px 14px;
  border: 1px solid rgba(148, 163, 184, 0.9);
  background: rgba(15, 23, 42, 0.7);
  text-decoration: none;
  color: #e5e7eb;
}

.nav-cta:hover {
  border-color: #22d3ee;
  color: #a5f3fc;
}

/* メイン（中央にまとめて配置） */
main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 16px 40px;
}

.hero {
  max-width: 720px;
  width: 100%;
  text-align: center;
}

.hero-tag {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: #a5f3fc;
  margin-bottom: 14px;
}

.hero-title {
  font-size: clamp(28px, 7vw, 46px);
  line-height: 1.2;
  font-weight: 700;
  margin-bottom: 12px;
}

.hero-title span {
  display: inline-block;
  background: linear-gradient(90deg, #7c3aed, #22d3ee, #38bdf8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-text {
  font-size: 14px;
  color: #e5e7eb;
  max-width: 480px;
  margin: 0 auto;
  margin-bottom: 24px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-bottom: 22px;
}

.btn-primary {
  font-size: 13px;
  padding: 10px 20px;
  border-radius: 999px;
  border: none;
  background: linear-gradient(90deg, #7c3aed, #22d3ee);
  color: #020617;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.9);
}

.btn-secondary {
  font-size: 13px;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.9);
  background: rgba(15, 23, 42, 0.75);
  color: #e5e7eb;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn-secondary:hover {
  border-color: #22d3ee;
  color: #a5f3fc;
}

.hero-info {
  font-size: 11px;
  color: #9ca3af;
}

.hero-info code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  background: rgba(15, 23, 42, 0.8);
  border-radius: 999px;
  padding: 4px 10px;
  border: 1px solid rgba(51, 65, 85, 0.9);
}

/* ABOUT セクション（1画面分だけ） */
.about {
  padding: 32px 16px 28px;
  text-align: center;
  font-size: 13px;
  color: #e5e7eb;
}

.about-title {
  font-size: 12px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: #9ca3af;
  margin-bottom: 10px;
}

.about-text {
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.8;
}

/* 共通セクションヘッダー */
.section-kicker {
  font-size: 11px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: #9ca3af;
  margin-bottom: 6px;
}

.section-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
}

.section-lead {
  font-size: 13px;
  color: #cbd5f5;
  margin-bottom: 20px;
}

/* Features */
.features {
  padding: 28px 16px 20px;
  color: #e5e7eb;
}

.features-inner {
  max-width: 960px;
  margin: 0 auto;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 8px;
}

.feature-card {
  background: rgba(15, 23, 42, 0.85);
  border-radius: 16px;
  border: 1px solid rgba(51, 65, 85, 0.9);
  padding: 14px 16px;
  font-size: 13px;
}

.feature-tag {
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #a5f3fc;
  margin-bottom: 6px;
}

.feature-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
}

.feature-text {
  font-size: 12px;
  color: #e5e7eb;
  line-height: 1.7;
}

/* News */
.news {
  padding: 24px 16px 20px;
  color: #e5e7eb;
}

.news-inner {
  max-width: 960px;
  margin: 0 auto;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 8px;
}

.news-card {
  background: rgba(15, 23, 42, 0.85);
  border-radius: 16px;
  border: 1px solid rgba(51, 65, 85, 0.9);
  padding: 14px 16px;
  font-size: 12px;
}

.news-date {
  font-size: 11px;
  color: #9ca3af;
  margin-bottom: 4px;
}

.news-title {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
}

.news-text {
  font-size: 12px;
  color: #e5e7eb;
  line-height: 1.7;
}

/* Media */
.media {
  padding: 24px 16px 40px;
  color: #e5e7eb;
}

.media-inner {
  max-width: 960px;
  margin: 0 auto;
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 8px;
}

.media-item {
  font-size: 12px;
}

.media-thumb-placeholder {
  border-radius: 16px;
  border: 1px solid rgba(51, 65, 85, 0.9);
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at top, rgba(56, 189, 248, 0.25), rgba(15, 23, 42, 0.9));
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #e5e7eb;
}

.media-caption {
  margin-top: 6px;
  color: #cbd5f5;
  line-height: 1.6;
}

/* スマホ向け調整 */
@media (max-width: 640px) {
  header {
    padding-inline: 12px;
  }

  .hero-text {
    font-size: 13px;
  }

  .feature-grid,
  .news-grid,
  .media-grid {
    grid-template-columns: 1fr;
  }
}