/* ========================================
   common.css - 共通スタイル
   ======================================== */

/* 簡易リセット */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Meiryo", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: #333;
  background-color: #fff;
}

a {
  color: #0066cc;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

ul {
  list-style: none;
}

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

/* コンテナ */
.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
}

/* セクション */
.section {
  padding: 60px 0;
}

.section-title {
  font-size: 1.75rem;
  font-weight: bold;
  margin-bottom: 24px;
  text-align: center;
}

/* ボタン */
.btn {
  display: inline-block;
  padding: 12px 32px;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: bold;
  text-align: center;
  cursor: pointer;
  transition: opacity 0.2s;
}

.btn:hover {
  opacity: 0.85;
  text-decoration: none;
}

.btn-primary {
  background-color: #0066cc;
  color: #fff;
}

.btn-small {
  padding: 8px 20px;
  font-size: 0.875rem;
}

.btn-large {
  padding: 16px 48px;
  font-size: 1.125rem;
}

/* ヘッダー */
.site-header {
  background-color: #fff;
  border-bottom: 1px solid #e0e0e0;
  padding: 12px 0;
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-logo {
  font-size: 1.25rem;
  font-weight: bold;
  color: #333;
}

.site-nav ul {
  display: flex;
  gap: 24px;
}

.site-nav a {
  color: #333;
  font-size: 0.875rem;
}

/* フッター */
.site-footer {
  background-color: #f5f5f5;
  padding: 24px 0;
  text-align: center;
  font-size: 0.875rem;
  color: #666;
}

/* レスポンシブ */
@media (max-width: 768px) {
  .section {
    padding: 40px 0;
  }

  .section-title {
    font-size: 1.375rem;
  }

  .site-header .container {
    flex-direction: column;
    gap: 8px;
  }

  .site-nav ul {
    gap: 16px;
  }
}