/* ================================================================
   common.css — PC互換性チェッカー 共通スタイル
   ================================================================ */

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

:root {
  --c-primary:  #4f46e5;
  --c-primary2: #7c3aed;
  --c-surface:  #ffffff;
  --c-border:   #e5e7eb;
  --c-text:     #111827;
  --c-muted:    #6b7280;
  --c-ok:       #16a34a;
  --c-warn:     #ca8a04;
  --c-ng:       #dc2626;
  --radius:     12px;
  --shadow:     0 1px 3px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.06);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", sans-serif;
  background: #f3f4f6;
  color: var(--c-text);
  min-height: 100vh;
}

/* ── ナビゲーション ── */
.site-nav {
  background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,.18);
}
.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px;
  display: flex;
  align-items: center;
  gap: 4px;
  height: 56px;
}
.nav-logo {
  font-size: 15px;
  font-weight: 800;
  color: #fff;
  text-decoration: none;
  white-space: nowrap;
  margin-right: 12px;
  letter-spacing: -.02em;
}
.nav-logo span { opacity: .75; font-weight: 400; }

/* ドロップダウン */
.nav-group { position: relative; }
.nav-group-btn {
  background: none;
  border: none;
  color: rgba(255,255,255,.88);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 10px;
  cursor: pointer;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: background .15s;
}
.nav-group-btn:hover { background: rgba(255,255,255,.12); color: #fff; }
.nav-group-btn::after { content: '▾'; font-size: 10px; }

.nav-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0,0,0,.14);
  min-width: 180px;
  padding: 6px 0;
  z-index: 200;
}
.nav-group:hover .nav-dropdown { display: block; }
.nav-dropdown a {
  display: block;
  padding: 9px 16px;
  font-size: 13px;
  color: var(--c-text);
  text-decoration: none;
  transition: background .1s;
}
.nav-dropdown a:hover { background: #f3f4f6; color: var(--c-primary); }

/* 通常リンク */
.nav-link {
  color: rgba(255,255,255,.88);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 10px;
  text-decoration: none;
  border-radius: 6px;
  transition: background .15s;
}
.nav-link:hover { background: rgba(255,255,255,.12); color: #fff; }

.nav-spacer { flex: 1; }

/* CTAボタン */
.nav-cta {
  background: #fff;
  color: var(--c-primary);
  font-size: 12px;
  font-weight: 700;
  padding: 8px 14px;
  border-radius: 20px;
  text-decoration: none;
  white-space: nowrap;
  transition: opacity .15s;
  letter-spacing: .01em;
}
.nav-cta:hover { opacity: .88; }

/* ── ページヘッダー ── */
.page-hero {
  background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  color: #fff;
  padding: 48px 20px 40px;
  text-align: center;
}
.page-hero h1 {
  font-size: clamp(22px, 5vw, 32px);
  font-weight: 800;
  letter-spacing: -.03em;
  margin-bottom: 10px;
}
.page-hero p {
  font-size: 15px;
  opacity: .85;
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ── コンテナ ── */
.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

/* ── カード ── */
.card {
  background: var(--c-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  margin-bottom: 24px;
}
.card h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid #f3f4f6;
  display: flex;
  align-items: center;
  gap: 8px;
}
.card h2 .icon { font-size: 20px; }
.card h3 { font-size: 15px; font-weight: 700; margin: 18px 0 8px; color: var(--c-text); }
.card p  { font-size: 14px; line-height: 1.75; color: #374151; margin-bottom: 10px; }
.card ul, .card ol {
  font-size: 14px;
  line-height: 1.75;
  color: #374151;
  padding-left: 20px;
  margin-bottom: 10px;
}
.card li { margin-bottom: 4px; }

/* ── 商品リンクカード ── */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 16px;
}
.product-item {
  border: 1.5px solid var(--c-border);
  border-radius: 10px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.product-item-name {
  font-size: 13px;
  font-weight: 700;
  color: var(--c-text);
  line-height: 1.4;
}
.product-item-desc {
  font-size: 12px;
  color: var(--c-muted);
  flex: 1;
  line-height: 1.5;
}
.btn-amazon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 8px 14px;
  background: #FF9900;
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  border-radius: 6px;
  text-decoration: none;
  transition: opacity .15s;
  white-space: nowrap;
  letter-spacing: .02em;
}
.btn-amazon:hover { opacity: .88; }

/* ── CTA バナー ── */
.cta-banner {
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  color: #fff;
  margin-bottom: 24px;
}
.cta-banner h2 { font-size: 18px; font-weight: 700; margin-bottom: 8px; border: none; padding: 0; color: #fff; }
.cta-banner p  { font-size: 13px; opacity: .85; margin-bottom: 16px; }
.btn-cta {
  display: inline-block;
  background: #fff;
  color: var(--c-primary);
  font-size: 14px;
  font-weight: 700;
  padding: 12px 28px;
  border-radius: 24px;
  text-decoration: none;
  transition: opacity .15s, transform .1s;
  letter-spacing: .01em;
}
.btn-cta:hover  { opacity: .92; }
.btn-cta:active { transform: scale(.97); }

/* ── 構成テーブル ── */
.build-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin: 16px 0;
}
.build-table th {
  background: #f3f4f6;
  padding: 10px 14px;
  text-align: left;
  font-weight: 700;
  color: var(--c-muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.build-table td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--c-border);
  vertical-align: middle;
}
.build-table tr:last-child td { border-bottom: none; }
.build-table td:last-child { text-align: right; }
.build-table .part-name { font-weight: 600; color: var(--c-text); }
.build-table .part-model { color: var(--c-muted); font-size: 12px; display: block; margin-top: 2px; }
.build-total td { font-weight: 700; font-size: 15px; border-top: 2px solid var(--c-border); }

/* ── バッジ ── */
.badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 20px;
  letter-spacing: .04em;
}
.badge-green  { background: #dcfce7; color: #16a34a; }
.badge-blue   { background: #dbeafe; color: #1d4ed8; }
.badge-orange { background: #ffedd5; color: #c2410c; }
.badge-purple { background: #ede9fe; color: #7c3aed; }

/* ── フッター ── */
.site-footer {
  background: #1f2937;
  color: #9ca3af;
  font-size: 12px;
  padding: 32px 20px;
  margin-top: 0;
}
.footer-inner {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: space-between;
}
.footer-col h4 { color: #e5e7eb; font-size: 13px; margin-bottom: 10px; }
.footer-col a  { display: block; color: #9ca3af; text-decoration: none; margin-bottom: 6px; }
.footer-col a:hover { color: #e5e7eb; }
.footer-copy {
  max-width: 860px;
  margin: 24px auto 0;
  padding-top: 16px;
  border-top: 1px solid #374151;
  text-align: center;
}
.footer-copy a { color: #9ca3af; text-decoration: underline; }

/* ── レスポンシブ ── */
@media (max-width: 640px) {
  .nav-group-btn::after { display: none; }
  .nav-link, .nav-group-btn { font-size: 12px; padding: 7px 8px; }
  .nav-cta { padding: 7px 11px; }
  .page-hero { padding: 36px 16px 28px; }
  .container { padding: 20px 12px 48px; }
  .card { padding: 20px 16px; }
  .product-grid { grid-template-columns: 1fr 1fr; }
  .footer-inner { flex-direction: column; gap: 16px; }
}
@media (max-width: 400px) {
  .product-grid { grid-template-columns: 1fr; }
}