/* ============================================
   明日のために for-tomorrow — 共通スタイル
   カラーテーマ: 落ち着いたブルー系
   ============================================ */

:root {
  --blue-dark:    #1E3A5F;
  --blue-mid:     #2E6DA4;
  --blue-light:   #5B9BD5;
  --blue-pale:    #EAF2FB;
  --blue-border:  #B5D4F4;

  --text-primary:   #1a2e3f;
  --text-secondary: #4a6078;
  --text-muted:     #7a95aa;

  --bg-page:    #f5f8fc;
  --bg-white:   #ffffff;
  --bg-surface: #f0f6fc;

  --accent:     #2E6DA4;
  --accent-hover: #1E3A5F;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 4px rgba(30,58,95,.08);
  --shadow-md: 0 4px 16px rgba(30,58,95,.12);

  --font-body: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;
  --font-heading: 'Noto Serif JP', 'Hiragino Mincho ProN', serif;

  --max-width: 860px;
  --content-width: 680px;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

/* ---- Header ---- */
.site-header {
  background: var(--blue-dark);
  color: #fff;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,.2);
}
.site-header .inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.site-logo {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  letter-spacing: .03em;
}
.site-logo span {
  font-size: .75rem;
  font-weight: 400;
  opacity: .75;
  display: block;
  letter-spacing: .05em;
}
.site-nav a {
  color: rgba(255,255,255,.85);
  text-decoration: none;
  font-size: .875rem;
  margin-left: 24px;
  transition: color .2s;
}
.site-nav a:hover { color: #fff; }

/* ---- Hero ---- */
.hero {
  background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue-mid) 100%);
  color: #fff;
  padding: 64px 24px;
  text-align: center;
}
.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 16px;
}
.hero p {
  font-size: 1rem;
  opacity: .85;
  max-width: 540px;
  margin: 0 auto 28px;
}
.btn-primary {
  display: inline-block;
  background: #fff;
  color: var(--blue-dark);
  font-weight: 700;
  font-size: .9rem;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: transform .15s, box-shadow .15s;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,.2);
}

/* ---- Layout ---- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 56px 0; }
.section-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  color: var(--blue-dark);
  margin-bottom: 8px;
  padding-bottom: 12px;
  border-bottom: 3px solid var(--blue-mid);
  display: inline-block;
}
.section-lead {
  font-size: .9rem;
  color: var(--text-secondary);
  margin: 8px 0 32px;
}

/* ---- Card ---- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.card {
  background: var(--bg-white);
  border: 1px solid var(--blue-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: box-shadow .2s, transform .2s;
  box-shadow: var(--shadow-sm);
}
.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.card-tag {
  display: inline-block;
  background: var(--blue-pale);
  color: var(--blue-mid);
  font-size: .72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 10px;
  letter-spacing: .04em;
}
.card h3 {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.card p {
  font-size: .83rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ---- Affiliate disclosure ---- */
.affiliate-note {
  background: var(--bg-surface);
  border-left: 3px solid var(--blue-light);
  padding: 10px 16px;
  font-size: .78rem;
  color: var(--text-muted);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
}

/* ---- Article layout ---- */
.article-wrap {
  max-width: var(--content-width);
  margin: 48px auto;
  padding: 0 24px;
}
.article-header { margin-bottom: 32px; }
.article-header .tag { /* same as card-tag */ }
.article-title {
  font-family: var(--font-heading);
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  line-height: 1.45;
  color: var(--blue-dark);
  margin: 12px 0;
}
.article-meta {
  font-size: .78rem;
  color: var(--text-muted);
}
.article-body h2 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--blue-dark);
  margin: 40px 0 12px;
  padding-left: 14px;
  border-left: 4px solid var(--blue-mid);
}
.article-body h3 {
  font-size: 1.05rem;
  color: var(--text-primary);
  margin: 28px 0 8px;
}
.article-body p { margin-bottom: 1.2em; }
.article-body ul, .article-body ol {
  margin: 12px 0 20px 24px;
}
.article-body li { margin-bottom: 6px; }

/* ---- Product box (アフィリエイト商品) ---- */
.product-box {
  border: 1px solid var(--blue-border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--bg-white);
  margin: 24px 0;
}
.product-box img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}
.product-box .product-info h4 { font-size: .95rem; margin-bottom: 6px; }
.product-box .product-info p { font-size: .82rem; color: var(--text-secondary); margin-bottom: 10px; }
.btn-shop {
  display: inline-block;
  padding: 7px 16px;
  border-radius: var(--radius-sm);
  font-size: .8rem;
  font-weight: 700;
  text-decoration: none;
  margin-right: 8px;
  transition: opacity .15s;
}
.btn-shop:hover { opacity: .85; }
.btn-amazon { background: #FF9900; color: #111; }
.btn-rakuten { background: #BF0000; color: #fff; }

/* ---- Footer ---- */
.site-footer {
  background: var(--blue-dark);
  color: rgba(255,255,255,.7);
  padding: 40px 24px;
  margin-top: 80px;
  font-size: .82rem;
  text-align: center;
}
.site-footer a { color: rgba(255,255,255,.7); text-decoration: none; }
.site-footer a:hover { color: #fff; }
.footer-links { margin-bottom: 12px; }
.footer-links a { margin: 0 12px; }

/* ---- Utility ---- */
.text-center { text-align: center; }
.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-32 { margin-top: 32px; }

/* ---- Responsive ---- */
@media (max-width: 600px) {
  .site-nav { display: none; }
  .card-grid { grid-template-columns: 1fr; }
  .product-box { flex-direction: column; }
  .hero { padding: 40px 16px; }
}