:root {
  --primary-color: #0f172a;       /* スレートネイビー */
  --primary-light: #f1f5f9;
  --primary-hover: #1e293b;
  --secondary-color: #0284c7;     /* スカイブルー */
  --accent-color: #ea580c;        /* 活力あるオレンジCTA */
  --accent-hover: #c2410c;
  --success-color: #059669;       /* エメラルドグリーン */
  --warning-bg: #fffbeb;
  --warning-border: #fcd34d;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --bg-light: #f8fafc;
  --card-bg: #ffffff;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -1px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.04);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --max-width: 1040px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.8;
  color: var(--text-main);
  background-color: var(--bg-light);
  font-size: 16px;
}

/* 景品表示法対応 PR表記バー */
.ad-disclosure-bar {
  background-color: #f1f5f9;
  color: #475569;
  font-size: 12px;
  padding: 6px 16px;
  text-align: center;
  border-bottom: 1px solid #cbd5e1;
}

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

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.site-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-badge {
  background: linear-gradient(135deg, #0284c7, #0f172a);
  color: #ffffff;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}

.site-nav ul {
  display: flex;
  list-style: none;
  gap: 16px;
  flex-wrap: wrap;
}

.site-nav a {
  text-decoration: none;
  color: var(--text-main);
  font-size: 14px;
  font-weight: 500;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.site-nav a:hover {
  color: var(--secondary-color);
  background-color: var(--primary-light);
}

/* コンテナレイアウト */
.container {
  max-width: var(--max-width);
  margin: 32px auto;
  padding: 0 20px;
}

.main-content {
  background-color: var(--card-bg);
  padding: 36px 40px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

/* ヒーローセクション */
.hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #ffffff;
  padding: 40px 32px;
  border-radius: var(--radius-md);
  margin-bottom: 36px;
  box-shadow: var(--shadow-md);
}

.hero-tag {
  display: inline-block;
  background-color: rgba(255, 255, 255, 0.15);
  color: #38bdf8;
  font-size: 13px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 14px;
}

.hero h1 {
  font-size: 1.85rem;
  line-height: 1.4;
  margin-bottom: 16px;
  font-weight: 800;
}

.hero p {
  font-size: 1.05rem;
  opacity: 0.92;
  line-height: 1.7;
}

/* 見出しスタイル */
h2 {
  font-size: 1.5rem;
  color: var(--primary-color);
  border-left: 5px solid var(--secondary-color);
  padding-left: 14px;
  margin: 40px 0 20px 0;
  font-weight: 700;
}

h3 {
  font-size: 1.25rem;
  color: var(--primary-color);
  margin: 28px 0 14px 0;
  font-weight: 600;
}

p {
  margin-bottom: 18px;
}

/* カードグリッド */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin: 24px 0;
}

.card {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.card-badge {
  display: inline-block;
  align-self: flex-start;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

.badge-blue { background-color: #e0f2fe; color: #0369a1; }
.badge-green { background-color: #d1fae5; color: #047857; }
.badge-purple { background-color: #f3e8ff; color: #7e22ce; }
.badge-orange { background-color: #ffedd5; color: #c2410c; }

.card h4 {
  font-size: 1.2rem;
  color: var(--primary-color);
  margin-bottom: 10px;
}

.card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  flex-grow: 1;
  margin-bottom: 16px;
}

/* 比較テーブル */
.comparison-table-wrapper {
  overflow-x: auto;
  margin: 28px 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background-color: #ffffff;
  text-align: left;
  font-size: 14px;
}

.comparison-table th,
.comparison-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
  background-color: #f8fafc;
  color: var(--primary-color);
  font-weight: 600;
  white-space: nowrap;
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-table tr.highlight {
  background-color: #f0fdf4;
}

.table-badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 12px;
  border-radius: 4px;
  font-weight: 600;
}
.badge-best { background-color: #dcfce7; color: #15803d; }
.badge-good { background-color: #e0f2fe; color: #0369a1; }

/* ボックススタイル */
.info-box {
  background-color: var(--primary-light);
  border-left: 4px solid var(--secondary-color);
  padding: 18px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
}

.info-box-title {
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 8px;
}

.warning-box {
  background-color: var(--warning-bg);
  border-left: 4px solid var(--warning-border);
  padding: 18px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
}

.warning-box-title {
  font-weight: 700;
  color: #92400e;
  margin-bottom: 8px;
}

/* CTAボタンスタイル */
.cta-container {
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border: 2px solid #cbd5e1;
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 32px 0;
  text-align: center;
}

.cta-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 10px;
}

.cta-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.btn-cta {
  display: inline-block;
  background-color: var(--accent-color);
  color: #ffffff !important;
  font-size: 1.05rem;
  font-weight: 700;
  padding: 14px 32px;
  border-radius: 30px;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(234, 88, 12, 0.35);
  transition: all 0.2s ease;
}

.btn-cta:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(234, 88, 12, 0.45);
}

.btn-cta-sub {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 8px;
}

/* フッター */
.site-footer {
  background-color: #0f172a;
  color: #94a3b8;
  padding: 40px 20px 24px 20px;
  margin-top: 60px;
  font-size: 14px;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid #1e293b;
}

.footer-col h5 {
  color: #ffffff;
  font-size: 15px;
  margin-bottom: 12px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 8px;
}

.footer-col a {
  color: #94a3b8;
  text-decoration: none;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: #38bdf8;
}

.footer-bottom {
  max-width: var(--max-width);
  margin: 20px auto 0 auto;
  text-align: center;
  font-size: 12px;
}

/* レスポンシブ */
@media (max-width: 768px) {
  .main-content {
    padding: 24px 18px;
  }
  .hero {
    padding: 28px 20px;
  }
  .hero h1 {
    font-size: 1.45rem;
  }
  .header-container {
    flex-direction: column;
    align-items: flex-start;
  }
}