/* 日本語比較メディア — 本番静的サイト用スタイル
   公開前にブランド色・ロゴを差し替え可。CDN依存なし。 */

:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --text: #1c2430;
  --muted: #5a6573;
  --border: #dfe4ea;
  --border-strong: #c8d0da;
  --accent: #1d4ed8;
  --accent-hover: #1e40af;
  --accent-soft: #eff4ff;
  --accent-line: #bfdbfe;
  --ink-soft: #334155;
  --success-soft: #ecfdf5;
  --success-border: #a7f3d0;
  --warn-bg: #fffbeb;
  --warn-border: #fde68a;
  --max: 760px;
  --max-wide: 960px;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 2px rgba(28, 36, 48, 0.04), 0 4px 16px rgba(28, 36, 48, 0.05);
  --font: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP",
    "Yu Gothic UI", "Yu Gothic", YuGothic, Meiryo, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
  letter-spacing: 0.01em;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-hover);
  text-decoration-thickness: 2px;
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

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

/* —— Header —— */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8);
}

.site-header-inner {
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: 0.85rem 1.35rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
}

.site-logo {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.site-logo::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 2px;
  background: var(--accent);
  flex-shrink: 0;
}

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

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.15rem;
  font-size: 0.9rem;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
}

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

.site-nav a[aria-current="page"] {
  color: var(--accent);
  background: var(--accent-soft);
  font-weight: 600;
}

/* —— Layout —— */
.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1.35rem 3.5rem;
}

.wrap--wide {
  max-width: var(--max-wide);
}

.page-title {
  font-size: clamp(1.45rem, 3.5vw, 1.85rem);
  line-height: 1.4;
  margin: 0 0 0.85rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--text);
}

.lead {
  color: var(--ink-soft);
  font-size: 1.05rem;
  line-height: 1.85;
  margin: 0 0 1.75rem;
}

.meta {
  font-size: 0.875rem;
  color: var(--muted);
  margin: 0 0 1.35rem;
}

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

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

.breadcrumb {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0 0 1rem;
}

.section-label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.65rem;
}

.section-heading {
  font-size: 1.25rem;
  margin: 0 0 1rem;
  font-weight: 700;
  line-height: 1.4;
}

/* —— Hero (index) —— */
.hero {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 2px);
  padding: 1.75rem 1.6rem;
  margin: 0 0 2rem;
  box-shadow: var(--shadow);
}

.hero .page-title {
  margin-bottom: 0.65rem;
}

.hero .lead {
  margin-bottom: 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.35rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  font-size: 0.925rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
  text-decoration: none;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
}

.btn--primary:hover {
  background: var(--accent-hover);
  color: #fff;
}

.btn--ghost {
  background: var(--surface);
  color: var(--accent);
  border-color: var(--accent-line);
}

.btn--ghost:hover {
  background: var(--accent-soft);
  color: var(--accent-hover);
}

/* —— Cards —— */
.card-list {
  list-style: none;
  padding: 0;
  margin: 0 0 2.25rem;
  display: grid;
  gap: 1rem;
}

.card-list--2col {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .card-list--2col {
    grid-template-columns: 1fr 1fr;
  }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.3rem 1.4rem;
  box-shadow: var(--shadow);
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.card:hover {
  border-color: var(--accent-line);
  box-shadow: 0 2px 8px rgba(29, 78, 216, 0.08);
}

.card h2,
.card .card-title {
  font-size: 1.08rem;
  margin: 0 0 0.5rem;
  line-height: 1.45;
  font-weight: 700;
}

.card h2 a,
.card .card-title a {
  color: var(--text);
  text-decoration: none;
}

.card h2 a:hover,
.card .card-title a:hover {
  color: var(--accent);
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.7;
  flex-grow: 1;
}

.card .card-link {
  margin-top: 0.85rem;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}

.card .card-link:hover {
  text-decoration: underline;
}

.tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  margin-bottom: 0.55rem;
  width: fit-content;
}

.tag--hub {
  color: #0f766e;
  background: var(--success-soft);
}

.tag--guide {
  color: #7c3aed;
  background: #f5f3ff;
}

/* —— Article —— */
.article h2 {
  font-size: 1.32rem;
  margin: 2.35rem 0 0.85rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--border);
  font-weight: 700;
  line-height: 1.4;
  scroll-margin-top: 4.5rem;
}

.article h3 {
  font-size: 1.08rem;
  margin: 1.65rem 0 0.55rem;
  font-weight: 700;
  color: var(--ink-soft);
  scroll-margin-top: 4.5rem;
}

.article p,
.article ul,
.article ol {
  margin: 0 0 1.05rem;
}

.article ul,
.article ol {
  padding-left: 1.45rem;
}

.article li {
  margin-bottom: 0.4rem;
}

.article li::marker {
  color: var(--accent);
}

.article strong {
  font-weight: 700;
  color: var(--text);
}

.toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  margin: 0 0 1.75rem;
  font-size: 0.92rem;
}

.toc strong {
  display: block;
  margin-bottom: 0.45rem;
  font-size: 0.85rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.toc ol {
  margin: 0;
  padding-left: 1.25rem;
}

.toc li {
  margin-bottom: 0.25rem;
}

.toc a {
  text-decoration: none;
}

.toc a:hover {
  text-decoration: underline;
}

.article table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin: 0.25rem 0 1.4rem;
  background: var(--surface);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: 0 0 0 1px var(--border);
}

.article th,
.article td {
  border: 1px solid var(--border);
  padding: 0.65rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

.article th {
  background: #eef2f7;
  font-weight: 600;
  white-space: nowrap;
}

.article tbody th {
  background: #f7f9fb;
  font-weight: 600;
  width: 7.5rem;
}

.table-note {
  font-size: 0.85rem;
  color: var(--muted);
  margin: -0.5rem 0 1.25rem;
}

.placeholder {
  background: #fef3c7;
  color: #92400e;
  padding: 0.08em 0.3em;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.88em;
  font-weight: 500;
}

.callout {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  border-left: 4px solid #f59e0b;
  border-radius: var(--radius-sm);
  padding: 0.95rem 1.15rem;
  margin: 1.35rem 0;
  font-size: 0.95rem;
}

.callout strong {
  display: block;
  margin-bottom: 0.3rem;
  color: var(--text);
}

.callout--info {
  background: var(--accent-soft);
  border-color: var(--accent-line);
  border-left-color: var(--accent);
}

.callout--ok {
  background: var(--success-soft);
  border-color: var(--success-border);
  border-left-color: #10b981;
}

.pr-note {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  padding: 0.9rem 1.1rem;
  margin: 0 0 1.5rem;
  font-size: 0.9rem;
  color: var(--muted);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.related {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.3rem;
  margin: 1.75rem 0;
}

.related h2 {
  font-size: 1.05rem;
  margin: 0 0 0.65rem;
  padding: 0;
  border: none;
}

.related ul {
  margin: 0;
  padding-left: 1.2rem;
}

.cta-box {
  background: linear-gradient(180deg, #f8faff 0%, var(--surface) 100%);
  border: 1px solid var(--accent-line);
  border-radius: var(--radius);
  padding: 1.2rem 1.35rem;
  margin: 1.5rem 0;
}

.cta-box p {
  margin: 0 0 0.65rem;
}

.cta-box p:last-child {
  margin-bottom: 0;
}

.checklist {
  list-style: none;
  padding: 0;
  margin: 0 0 1.25rem;
}

.checklist li {
  position: relative;
  padding: 0.55rem 0.75rem 0.55rem 2.1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 0.45rem;
}

.checklist li::before {
  content: "";
  position: absolute;
  left: 0.75rem;
  top: 0.85rem;
  width: 0.85rem;
  height: 0.85rem;
  border: 2px solid var(--accent);
  border-radius: 3px;
}

.footnotes {
  margin-top: 2.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
}

.footnotes h2 {
  font-size: 1rem;
  margin: 0 0 0.65rem;
  padding: 0;
  border: none;
  color: var(--muted);
}

.footnotes ol {
  padding-left: 1.25rem;
  margin: 0;
}

.footnotes a {
  word-break: break-all;
}

.policy-list {
  margin: 0 0 1.5rem;
  padding-left: 1.35rem;
}

.policy-list li {
  margin-bottom: 0.45rem;
  color: var(--ink-soft);
}

/* —— Footer —— */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 1.75rem 1.35rem 2.25rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.site-footer-inner {
  max-width: var(--max-wide);
  margin: 0 auto;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  margin-bottom: 0.85rem;
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.site-footer .footer-note {
  margin: 0;
  line-height: 1.65;
}

/* —— Mobile —— */
@media (max-width: 640px) {
  .site-header-inner {
    padding: 0.75rem 1rem;
  }

  .site-nav {
    width: 100%;
    gap: 0.25rem;
  }

  .site-nav a {
    padding: 0.3rem 0.5rem;
    font-size: 0.85rem;
  }

  .wrap {
    padding: 1.5rem 1rem 2.75rem;
  }

  .hero {
    padding: 1.35rem 1.15rem;
  }

  .article table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .article th,
  .article td {
    padding: 0.5rem 0.55rem;
  }
}

@media (max-width: 400px) {
  .page-title {
    font-size: 1.35rem;
  }
}

@media print {
  .site-header,
  .site-footer,
  .hero-actions {
    position: static;
    box-shadow: none;
  }

  body {
    background: #fff;
  }

  .card,
  .hero,
  .toc {
    box-shadow: none;
  }
}