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

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #222;
  line-height: 1.6;
  background-color: #f7f7f9;
}

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

.container {
  width: 90%;
  max-width: 1080px;
  margin: 0 auto;
}

/* ヘッダー */

.site-header {
  background-color: #ffffff;
  border-bottom: 1px solid #e0e0e5;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0;
}

.logo {
  display: flex;
  flex-direction: column;
}

.logo-main {
  font-weight: 700;
  font-size: 1.2rem;
  color: #0052cc;
}

.logo-sub {
  font-size: 0.8rem;
  color: #666;
}

.nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
}

.nav a {
  text-decoration: none;
  color: #333;
  font-size: 0.95rem;
}

.nav a:hover {
  color: #0052cc;
}

/* スマホ用メニュー */

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
}

/* ヒーロー */

.hero {
  background: linear-gradient(135deg, #0052cc, #00a3ff);
  color: #fff;
  padding: 4rem 0 3rem;
}

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

.hero h1 {
  font-size: 2.2rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1rem;
  margin-bottom: 1.5rem;
}

.btn-primary {
  display: inline-block;
  padding: 0.7rem 1.6rem;
  background-color: #ffb300;
  color: #222;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  background-color: #ffca3a;
}

/* セクション */

.section {
  padding: 3rem 0;
  background-color: #f7f7f9;
}

.section-alt {
  background-color: #ffffff;
}

.section h2 {
  font-size: 1.6rem;
  margin-bottom: 1.5rem;
  border-left: 4px solid #0052cc;
  padding-left: 0.6rem;
}

/* レイアウト */

.two-column {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2rem;
}

.three-column {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

/* 会社概要テーブル */

.company-table {
  width: 100%;
  border-collapse: collapse;
  background-color: #fff;
  font-size: 0.9rem;
}

.company-table th,
.company-table td {
  border: 1px solid #ddd;
  padding: 0.5rem 0.7rem;
}

.company-table th {
  width: 30%;
  background-color: #f0f4ff;
  text-align: left;
}

/* カード */

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.card {
  background-color: #f7f9ff;
  border-radius: 8px;
  padding: 1.2rem;
  border: 1px solid #e0e4ff;
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.6rem;
  font-size: 1.1rem;
}

/* ポイント */

.point {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 1.2rem;
  border: 1px solid #e0e0e5;
}

.point h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.05rem;
}

/* お問い合わせフォーム */

.contact-form {
  max-width: 520px;
  background-color: #ffffff;
  padding: 1.5rem;
  border-radius: 8px;
  border: 1px solid #e0e0e5;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.3rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.5rem;
  border-radius: 4px;
  border: 1px solid #ccc;
  font-size: 0.95rem;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #0052cc;
  box-shadow: 0 0 0 1px rgba(0, 82, 204, 0.2);
}

.form-message {
  margin-top: 0.8rem;
  font-size: 0.9rem;
}

/* フッター */

.site-footer {
  background-color: #111827;
  color: #e5e7eb;
  padding: 1.5rem 0;
  font-size: 0.85rem;
}

.footer-inner {
  text-align: center;
}

.footer-note {
  color: #9ca3af;
  margin-top: 0.3rem;
}

/* レスポンシブ */

@media (max-width: 900px) {
  .two-column {
    grid-template-columns: 1fr;
  }

  .cards,
  .three-column {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .header-inner {
    align-items: center;
  }

  .nav {
    display: none;
    position: absolute;
    top: 56px;
    right: 0;
    background-color: #ffffff;
    width: 100%;
    border-bottom: 1px solid #e0e0e5;
  }

  .nav ul {
    flex-direction: column;
    padding: 0.8rem 1rem 1rem;
    gap: 0.8rem;
  }

  .nav-toggle {
    display: block;
  }

  .nav.open {
    display: block;
  }

  .hero {
    padding: 3rem 0 2.5rem;
  }

  .hero h1 {
    font-size: 1.7rem;
  }

  .cards,
  .three-column {
    grid-template-columns: 1fr;
  }
}