/* スマホ料金比較 — 記事ページ共通スタイル（お金診断テンプレを移植、sim カラー #4facfe に調整） */
:root {
  --color-bg: #faf8f5;
  --color-bg-soft: #f3efe8;
  --color-text: #1a1a1a;
  --color-muted: #6b6b6b;
  --color-subtle: #9a9a9a;
  --color-navy: #1a1a1a;
  --color-navy-light: #4a4a4a;
  --color-accent: #4facfe;
  --color-accent-soft: #e6f4ff;
  --color-border: #e8e4dc;
  --color-card-bg: #f3efe8;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --max-width: 880px;
  --max-width-wide: 1100px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --radius: 12px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", "Helvetica Neue", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--color-navy); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--color-navy-light); }
img { max-width: 100%; height: auto; }

/* ========== Header ========== */
.site-header {
  background: var(--color-bg);
  color: var(--color-text);
  padding: 16px;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: saturate(180%) blur(8px);
}
.site-header-inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.site-logo {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.site-logo:hover { color: var(--color-text); }
.site-nav { display: flex; gap: 24px; }
.site-nav a {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  white-space: nowrap;
}
.site-nav a:hover { color: var(--color-text); }

/* ========== Main ========== */
main { padding: 0 16px 60px; }
.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

/* ========== Article ========== */
.article-page main { padding-top: 32px; }
.article-page article {
  max-width: 720px;
  margin: 0 auto;
}
.article-page article h1 {
  font-size: 28px;
  color: var(--color-navy);
  line-height: 1.4;
  margin: 0 0 8px;
}
.article-page .article-meta {
  color: var(--color-muted);
  font-size: 13px;
  margin-bottom: 28px;
}
.article-page .pr-notice {
  font-size: 12px;
  background: #f3f4f6;
  color: var(--color-muted);
  padding: 6px 10px;
  border-radius: 4px;
  margin-bottom: 16px;
  display: inline-block;
}
.article-page article h2 {
  font-size: 20px;
  border-left: 4px solid var(--color-accent);
  padding-left: 10px;
  margin: 36px 0 14px;
}
.article-page article h3 {
  font-size: 17px;
  color: var(--color-navy);
}
.article-page article p { margin: 12px 0; }
.article-page article ul, .article-page article ol { margin: 12px 0; padding-left: 24px; }
.article-page article li { margin: 4px 0; }
.article-page article table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}
.article-page article th, .article-page article td {
  border: 1px solid var(--color-border);
  padding: 8px 10px;
  text-align: left;
}
.article-page article th { background: var(--color-card-bg); }
.article-page article .table-wrapper {
  overflow-x: auto;
  margin: 16px 0;
  -webkit-overflow-scrolling: touch;
}
.article-page article .table-wrapper table {
  margin: 0;
  min-width: 540px;
}
.article-page article blockquote {
  border-left: 4px solid var(--color-accent);
  background: var(--color-card-bg);
  padding: 12px 16px;
  margin: 16px 0;
  color: var(--color-muted);
  font-size: 14px;
}
.cross-tool {
  background: var(--color-accent-soft);
  border: 1px dashed var(--color-accent);
  border-radius: var(--radius);
  padding: 18px;
  margin: 28px 0;
}
.cross-tool h4 { margin: 0 0 8px; color: var(--color-navy); font-size: 15px; }
.cross-tool a { font-weight: 600; }

/* ========== Footer ========== */
.site-footer {
  background: var(--color-bg);
  color: var(--color-muted);
  padding: 40px 16px 30px;
  margin-top: 80px;
  border-top: 1px solid var(--color-border);
}
.site-footer-inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  text-align: center;
  font-size: 0.85rem;
}
.site-footer-inner a { color: var(--color-muted); }
.site-footer-inner a:hover { color: var(--color-text); }
.site-footer-inner .links {
  margin-bottom: 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}
.site-footer-inner .copyright {
  color: var(--color-subtle);
  font-size: 0.8rem;
}
.site-footer-inner .related {
  background: var(--color-bg-soft);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 20px;
  font-size: 0.85rem;
}
.site-footer-inner .related strong { display: block; margin-bottom: 8px; color: var(--color-text); }
.site-footer-inner .related .tools-list { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.site-footer-inner .related .tools-list a {
  background: #fff;
  border: 1px solid var(--color-border);
  padding: 4px 12px;
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.8rem;
  color: var(--color-text);
}
.site-footer-inner .related .tools-list a:hover {
  border-color: var(--color-accent);
}

/* ========== Compare 記事カード一覧 ========== */
.compare-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin: 24px 0;
}
.compare-card {
  display: block;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  text-decoration: none;
  color: var(--color-text);
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
}
.compare-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  color: var(--color-text);
}
.compare-card .tag {
  display: inline-block;
  font-size: 11px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  padding: 2px 10px;
  border-radius: 999px;
  font-weight: 600;
  margin-bottom: 8px;
}
.compare-card h3 {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-navy);
}
.compare-card p {
  margin: 0;
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.6;
}
.compare-card .date {
  display: block;
  margin-top: 10px;
  font-size: 11px;
  color: var(--color-subtle);
}

/* ========== FAQ list (dl) ========== */
.faq-list {
  margin: 16px 0 24px;
  padding: 0;
}
.faq-list dt {
  font-weight: 700;
  color: var(--color-navy);
  margin: 14px 0 6px;
  padding: 10px 12px;
  background: var(--color-accent-soft);
  border-left: 3px solid var(--color-accent);
  border-radius: 4px;
  font-size: 15px;
  line-height: 1.5;
}
.faq-list dd {
  margin: 0 0 8px;
  padding: 6px 12px 10px;
  line-height: 1.7;
  color: var(--color-text);
}

/* ========== TL;DR (3行サマリー) ========== */
.tldr {
  margin: 18px 0 26px;
  padding: 16px 20px;
  background: var(--color-accent-soft);
  border-left: 4px solid var(--color-accent);
  border-radius: 6px;
}
.tldr strong:first-child {
  display: block;
  margin-bottom: 8px;
  color: var(--color-navy);
  font-size: 15px;
}
.tldr ul {
  margin: 0 0 6px;
  padding-left: 20px;
}
.tldr li {
  margin: 6px 0;
  line-height: 1.7;
}
.tldr .tldr-note {
  margin: 8px 0 0;
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.65;
}

/* ========== Table of Contents (TOC) ========== */
.toc {
  margin: 18px 0 26px;
  padding: 14px 18px;
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.7;
}
.toc strong {
  display: block;
  margin-bottom: 6px;
  color: var(--color-navy);
  font-size: 15px;
}
.toc ol {
  margin: 0;
  padding-left: 22px;
  columns: 2;
  column-gap: 24px;
}
.toc li {
  margin: 2px 0;
  break-inside: avoid;
}
.toc a {
  color: var(--color-accent);
  text-decoration: none;
}
.toc a:hover {
  text-decoration: underline;
}
@media (max-width: 600px) {
  .toc ol { columns: 1; }
}

/* ========== Responsive ========== */
@media (max-width: 600px) {
  .site-header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .site-nav {
    gap: 10px 14px;
    width: 100%;
    flex-wrap: wrap;
  }
  .site-nav a { font-size: 0.85rem; }
  .article-page article h1 { font-size: 22px; }
  .faq-list dt { font-size: 14px; }
}