@charset "UTF-8";

/* ===================================================
   リセットCSS & 全体共通設定
   =================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #1e3a5f;       /* 信頼感のあるディープネイビー */
  --color-primary-light: #2a5286; /* 明るめネイビー */
  --color-accent: #e65100;        /* 活気あるアンバーオレンジ */
  --color-accent-sub: #0284c7;    /* 情報リンク用のシアンブルー */
  --color-text-main: #2b2f38;     /* 視認性の高いダークチャコール */
  --color-text-muted: #64748b;    /* 補足用グレー */
  --color-bg-body: #f8fafc;       /* 背景色（淡いソフトグレー） */
  --color-bg-card: #ffffff;       /* カード背景（純白） */
  --color-border: #e2e8f0;        /* 枠線 */
  --font-base: "Helvetica Neue", "Arial", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
}

body {
  font-family: var(--font-base);
  font-size: 16px;
  line-height: 1.85;
  color: var(--color-text-main);
  background-color: var(--color-bg-body);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-accent-sub);
  text-decoration: none;
  transition: opacity 0.2s ease, color 0.2s ease;
}

a:hover {
  text-decoration: underline;
  opacity: 0.85;
}

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

/* ===================================================
   サイトヘッダー
   =================================================== */
.site-header {
  background-color: #ffffff;
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-logo a {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-primary);
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.site-logo a span {
  font-size: 0.72rem;
  font-weight: normal;
  color: var(--color-text-muted);
  margin-top: 3px;
}

.site-nav ul {
  display: flex;
  list-style: none;
  gap: 20px;
}

.site-nav a {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text-main);
}

.site-nav a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

/* ===================================================
   パンくずリスト
   =================================================== */
.breadcrumb-wrapper {
  background-color: #ffffff;
  border-bottom: 1px solid var(--color-border);
}

.breadcrumbs {
  max-width: 860px;
  margin: 0 auto;
  padding: 10px 20px;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.breadcrumbs li + li::before {
  content: "›";
  margin: 0 8px;
  color: #94a3b8;
}

.breadcrumbs a {
  color: var(--color-text-muted);
}

/* ===================================================
   メインコンテナ・記事レイアウト
   =================================================== */
.main-container {
  max-width: 860px;
  margin: 32px auto 60px;
  padding: 0 16px;
}

.post-content {
  background: var(--color-bg-card);
  padding: 44px 48px;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

/* 記事ヘッダー */
.post-header {
  margin-bottom: 24px;
}

.post-category {
  display: inline-block;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: bold;
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 14px;
  letter-spacing: 0.05em;
}

.post-title {
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1.45;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.post-meta {
  display: flex;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 16px;
}

/* アイキャッチプレースホルダー */
.eyecatch-area {
  margin: 24px 0 32px;
}

.eyecatch-placeholder {
  background: linear-gradient(135deg, #1e3a5f 0%, #3b82f6 100%);
  color: #ffffff;
  padding: 45px 20px;
  border-radius: 10px;
  text-align: center;
  box-shadow: var(--shadow-md);
}

.eyecatch-icon {
  font-size: 2.8rem;
  display: block;
  margin-bottom: 8px;
}

.eyecatch-caption {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin: 0;
}

/* リード文 */
.lead-box {
  background-color: #f1f5f9;
  border-left: 5px solid var(--color-primary);
  padding: 22px 26px;
  border-radius: 0 8px 8px 0;
  margin-bottom: 36px;
  font-size: 1.02rem;
}

.lead-box p + p {
  margin-top: 12px;
}

/* ===================================================
   目次 (TOC)
   =================================================== */
.toc-card {
  background-color: #f8fafc;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  padding: 22px 28px;
  margin: 36px 0 48px;
}

.toc-title {
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--color-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
}

.toc-title::before {
  content: "📑";
  margin-right: 8px;
  font-size: 1.2rem;
}

.toc-list {
  padding-left: 20px;
}

.toc-list li {
  margin-bottom: 8px;
}

.toc-list a {
  color: var(--color-text-main);
  font-weight: 500;
}

.toc-list a:hover {
  color: var(--color-accent);
}

/* ===================================================
   見出しスタイル (h2, h3)
   =================================================== */
article section {
  margin-bottom: 48px;
}

h2 {
  font-size: 1.45rem;
  color: var(--color-primary);
  background-color: #edf2f7;
  padding: 12px 18px;
  border-left: 6px solid var(--color-accent);
  border-radius: 0 6px 6px 0;
  margin: 44px 0 20px;
  position: relative;
  line-height: 1.4;
}

h3 {
  font-size: 1.2rem;
  color: #1e293b;
  border-bottom: 2px solid #e2e8f0;
  padding-bottom: 8px;
  margin: 30px 0 16px;
  position: relative;
}

h3::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 50px;
  height: 2px;
  background-color: var(--color-primary);
}

p {
  margin-bottom: 18px;
}

ul, ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

li {
  margin-bottom: 8px;
}

/* ===================================================
   パーツ＆装飾ボックス（用語解説・ポイント・比較表）
   =================================================== */

/* 用語解説ボックス */
.glossary-box {
  background-color: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 8px;
  padding: 18px 22px;
  margin: 22px 0 26px;
}

.glossary-badge {
  display: inline-block;
  background-color: #2563eb;
  color: #ffffff;
  font-size: 0.72rem;
  font-weight: bold;
  padding: 3px 8px;
  border-radius: 4px;
  margin-bottom: 8px;
}

.glossary-term {
  font-weight: 800;
  color: #1e40af;
  font-size: 1rem;
  margin-bottom: 6px;
}

.glossary-desc {
  font-size: 0.94rem;
  margin-bottom: 0;
  color: #1e293b;
}

/* ポイント枠（通常・警告） */
.point-box {
  border-radius: 8px;
  padding: 18px 22px;
  margin: 24px 0;
}

.point-box.info {
  background-color: #f0fdf4;
  border-left: 5px solid #22c55e;
}

.point-box.warning {
  background-color: #fff7ed;
  border-left: 5px solid #f97316;
}

.point-title {
  font-weight: bold;
  margin-bottom: 8px;
  font-size: 1.02rem;
}

.point-box p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* テーブルスタイル */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 26px 0;
  border-radius: 8px;
  border: 1px solid var(--color-border);
}

.custom-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
  text-align: left;
}

.custom-table th {
  background-color: #f1f5f9;
  color: var(--color-primary);
  font-weight: 700;
  padding: 12px 16px;
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
}

.custom-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.custom-table tbody tr:nth-child(even) {
  background-color: #fafbfc;
}

/* カードグリッド（社外品3大テクニック） */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 24px 0 30px;
}

.feature-card {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-top: 4px solid var(--color-primary);
  border-radius: 8px;
  padding: 18px 16px;
  box-shadow: var(--shadow-sm);
}

.card-num {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.feature-card h4 {
  font-size: 1rem;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.88rem;
  color: #475569;
  margin-bottom: 0;
  line-height: 1.6;
}

/* DO / DONT グリッド */
.do-dont-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 24px 0 32px;
}

.do-box, .dont-box {
  padding: 22px 20px;
  border-radius: 8px;
  font-size: 0.92rem;
}

.do-box {
  background-color: #f0fdf4;
  border: 1px solid #bbf7d0;
}

.dont-box {
  background-color: #fef2f2;
  border: 1px solid #fecaca;
}

.box-badge {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 14px;
}

.do-badge {
  background-color: #16a34a;
  color: #ffffff;
}

.dont-badge {
  background-color: #dc2626;
  color: #ffffff;
}

.do-box ul, .dont-box ul {
  padding-left: 18px;
  margin-bottom: 0;
}

.do-box li, .dont-box li {
  margin-bottom: 10px;
}

/* まとめボックス */
.summary-box {
  background-color: #f8fafc;
  border: 2px dashed #94a3b8;
  border-radius: 10px;
  padding: 24px 28px;
  margin: 24px 0 28px;
}

.summary-list {
  list-style: none;
  padding-left: 0;
  margin-bottom: 0;
}

.summary-list li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 12px;
  font-weight: 500;
}

.summary-list li::before {
  content: "✔";
  position: absolute;
  left: 0;
  color: #16a34a;
  font-weight: bold;
}

/* ===================================================
   お問い合わせフォーム
   =================================================== */
.contact-section {
  margin-top: 64px;
  padding-top: 36px;
  border-top: 2px dashed var(--color-border);
}

.contact-header {
  text-align: center;
  margin-bottom: 28px;
}

.contact-header h2 {
  background: none;
  border: none;
  padding: 0;
  margin: 0 0 10px 0;
  font-size: 1.6rem;
  color: var(--color-primary);
  text-align: center;
}

.contact-header p {
  color: var(--color-text-muted);
  font-size: 0.94rem;
  margin-bottom: 0;
}

.contact-form {
  background-color: #f8fafc;
  border: 1px solid var(--color-border);
  padding: 32px 36px;
  border-radius: 10px;
  max-width: 650px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 22px;
}

.form-group label {
  display: block;
  font-size: 0.94rem;
  font-weight: bold;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.required {
  background-color: #ef4444;
  color: #ffffff;
  font-size: 0.72rem;
  font-weight: bold;
  padding: 2px 6px;
  border-radius: 3px;
  margin-left: 6px;
}

.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.96rem;
  background-color: #ffffff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-submit {
  text-align: center;
  margin-top: 28px;
}

.submit-btn {
  background-color: var(--color-accent);
  color: #ffffff;
  border: none;
  font-size: 1.05rem;
  font-weight: 700;
  padding: 14px 44px;
  border-radius: 50px;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(230, 81, 0, 0.25);
  transition: transform 0.15s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.submit-btn:hover {
  background-color: #c94400;
  box-shadow: 0 6px 14px rgba(230, 81, 0, 0.35);
  transform: translateY(-2px);
}

/* ===================================================
   フッター
   =================================================== */
.site-footer {
  background-color: #1e293b;
  color: #94a3b8;
  padding: 32px 20px;
  font-size: 0.86rem;
  text-align: center;
}

.footer-inner {
  max-width: 860px;
  margin: 0 auto;
}

.footer-links {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 10px;
}

.footer-links a {
  color: #cbd5e1;
}

/* ===================================================
   レスポンシブ対応（メディアクエリ）
   =================================================== */
@media (max-width: 768px) {
  body {
    font-size: 15px;
  }

  .main-container {
    padding: 0 10px;
    margin: 16px auto 40px;
  }

  .post-content {
    padding: 24px 18px;
  }

  .post-title {
    font-size: 1.4rem;
  }

  h2 {
    font-size: 1.25rem;
    padding: 10px 14px;
  }

  h3 {
    font-size: 1.1rem;
  }

  .eyecatch-placeholder {
    padding: 30px 16px;
  }

  .eyecatch-caption {
    font-size: 0.92rem;
  }

  .lead-box {
    padding: 18px 16px;
    font-size: 0.95rem;
  }

  .toc-card {
    padding: 18px 18px;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .do-dont-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .contact-form {
    padding: 22px 18px;
  }

  .submit-btn {
    width: 100%;
    padding: 14px 20px;
  }
}