/* ベース */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "ヒラギノ角ゴ ProN",
    "Hiragino Kaku Gothic ProN", "Yu Gothic", "メイリオ", sans-serif;
  color: #222;
  background-color: #f5f7fb;
  line-height: 1.6;
}

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

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

/* レイアウト */
.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ヘッダー */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
}

.logo {
  font-weight: 700;
  font-size: 16px;
}

.site-nav a {
  margin-left: 16px;
  font-size: 14px;
  opacity: 0.8;
}

.site-nav a:hover {
  opacity: 1;
}

/* ヒーロー */
.hero {
  padding: 72px 0 56px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: 32px;
  align-items: center;
}

.hero-tagline {
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #2b6cb0;
  margin-bottom: 8px;
}

.hero-title {
  font-size: 28px;
  line-height: 1.5;
  margin: 0 0 16px;
}

.hero-lead {
  font-size: 15px;
  margin-bottom: 20px;
  color: #444;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 8px;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  font-size: 14px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.1s ease, box-shadow 0.1s ease, background 0.15s ease;
}

.btn-primary {
  background: #2b6cb0;
  color: #fff;
  box-shadow: 0 6px 16px rgba(43, 108, 176, 0.35);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(43, 108, 176, 0.4);
}

.btn-secondary {
  background: #fff;
  color: #2b6cb0;
  border-color: rgba(43, 108, 176, 0.25);
}

.btn-secondary:hover {
  background: #ebf4ff;
}

.hero-note {
  font-size: 12px;
  color: #666;
}

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-placeholder {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: 18px;
  background: linear-gradient(135deg, #edf2ff, #e6fffa);
  border: 1px solid rgba(0, 0, 0, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #4a5568;
  font-size: 14px;
  text-align: center;
  padding: 12px;
}

/* セクション共通 */
.section {
  padding: 56px 0;
}

.section-title {
  font-size: 22px;
  margin: 0 0 12px;
}

.section-lead {
  font-size: 15px;
  color: #444;
  margin-bottom: 16px;
}

.section-text {
  font-size: 14px;
  color: #555;
}

/* 特徴セクション */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.feature-card {
  background: #fff;
  border-radius: 16px;
  padding: 16px 18px;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.05);
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.feature-title {
  font-size: 16px;
  margin: 0 0 8px;
}

.feature-text {
  font-size: 13px;
  color: #444;
}

/* フッター */
.site-footer {
  padding: 24px 0 32px;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  background: #fff;
}

.footer-text {
  font-size: 12px;
  color: #666;
  text-align: center;
}

/* フェードイン（JS連動） */
.fade-target {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-target.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* レスポンシブ（スマホ） */

/* お問い合わせフォーム */
.contact-form {
  margin-top: 24px;
  max-width: 640px;
}

.form-row {
  display: flex;
  flex-direction: column;
  margin-bottom: 14px;
}

.form-row label {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 4px;
}

.form-row input,
.form-row select,
.form-row textarea {
  border-radius: 8px;
  border: 1px solid rgba(148, 163, 184, 0.8);
  padding: 8px 10px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  background-color: #fff;
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  border-color: #2b6cb0;
  box-shadow: 0 0 0 1px rgba(43, 108, 176, 0.15);
}

.form-actions {
  margin-top: 12px;
}

/* 今後の展望セクション */
.roadmap-list {
  margin: 8px 0 0;
  padding-left: 1.4rem;
  font-size: 14px;
  color: #555;
}

.section-actions {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
@media (max-width: 768px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero {
    padding-top: 56px;
  }

  .hero-title {
    font-size: 24px;
  }

  .features-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .site-nav {
    display: none; /* 必要ならハンバーガーメニューを後で追加 */
  }
}