/* ========================================
   本アプリ — GitHub Pages 共通スタイル
   フォレストグリーン基調・レスポンシブ対応
   ======================================== */

:root {
  --color-primary: #1b4332;
  --color-primary-dark: #081c15;
  --color-primary-light: #2d6a4f;
  --color-accent: #40916c;
  --color-bg: #f8f9f8;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #4a5568;
  --color-border: #e2e8e4;
  --color-footer-bg: #1b4332;
  --color-footer-text: #d8f3dc;
  --max-width: 720px;
  --header-height: 64px;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(27, 67, 50, 0.08);
  --shadow-hover: 0 4px 12px rgba(27, 67, 50, 0.12);
}

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

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

body {
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP",
    Meiryo, sans-serif;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------- Header ---------- */

.site-header {
  background-color: var(--color-primary);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(8, 28, 21, 0.2);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
  gap: 1rem;
  flex-wrap: wrap;
}

.site-brand {
  font-size: 1.125rem;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.site-brand:hover {
  color: #d8f3dc;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
  list-style: none;
}

.site-nav a {
  color: rgba(255, 255, 255, 0.88);
  text-decoration: none;
  font-size: 0.875rem;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: #fff;
  border-bottom-color: #95d5b2;
}

/* ---------- Main ---------- */

.site-main {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.page-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 0.75rem;
  line-height: 1.35;
}

.page-lead {
  color: var(--color-text-muted);
  margin-bottom: 2rem;
  font-size: 1rem;
}

.page-toc {
  margin: 0 0 1.5rem;
}

.page-toc ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-toc a {
  color: var(--color-primary-light);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 600;
  border-bottom: 1px solid transparent;
}

.page-toc a:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-accent);
}

.site-main > .content-body + .content-body {
  margin-top: 1.25rem;
}

#faq,
#operator-info {
  scroll-margin-top: calc(var(--header-height) + 1rem);
}

.content-body {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--shadow);
}

.content-body p {
  margin-bottom: 1rem;
  color: var(--color-text);
}

.content-body p:last-child {
  margin-bottom: 0;
}

.content-body h2 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 2rem 0 0.75rem;
  padding-bottom: 0.375rem;
  border-bottom: 1px solid var(--color-border);
  line-height: 1.4;
}

.content-body h2:first-of-type {
  margin-top: 1.5rem;
}

.content-body ul,
.content-body ol {
  margin: 0.75rem 0 1.25rem 1.25rem;
  color: var(--color-text);
}

.content-body ol {
  padding-left: 0.5rem;
}

.content-body li {
  margin-bottom: 0.5rem;
}

.content-body li:last-child {
  margin-bottom: 0;
}

.content-body li ul {
  margin: 0.5rem 0 0.25rem 1.25rem;
}

.content-body strong {
  font-weight: 700;
  color: var(--color-primary-dark);
}

.content-body a {
  color: var(--color-primary-light);
  text-decoration: underline;
  word-break: break-all;
}

.content-body a:hover {
  color: var(--color-primary);
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 1rem 0 1.25rem;
  -webkit-overflow-scrolling: touch;
}

.content-body table {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  font-size: 0.875rem;
  line-height: 1.6;
}

.content-body th,
.content-body td {
  border: 1px solid var(--color-border);
  padding: 0.625rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

.content-body th {
  background-color: #f0faf4;
  color: var(--color-primary-dark);
  font-weight: 700;
}

.legal-operator {
  margin-top: 1.5rem;
  font-weight: 600;
  color: var(--color-primary-dark);
}

.updated-date {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.notice {
  margin-top: 1.25rem;
  padding: 0.875rem 1rem;
  background-color: #f0faf4;
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.9375rem;
  color: var(--color-primary-dark);
}

.email-display {
  display: inline-block;
  margin: 0.75rem 0 1.25rem;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-primary-light);
  text-decoration: none;
  word-break: break-all;
}

.email-display:hover {
  text-decoration: underline;
  color: var(--color-primary);
}

.section-heading {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 1rem;
}

/* ---------- FAQ accordion ---------- */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background-color: var(--color-surface);
  overflow: hidden;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 1rem 2.5rem 1rem 1.25rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  position: relative;
  user-select: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-accent);
  line-height: 1;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item summary:hover {
  background-color: #f0faf4;
}

.faq-answer {
  padding: 0 1.25rem 1rem;
  color: var(--color-text);
  border-top: 1px solid var(--color-border);
}

.faq-answer p {
  margin-top: 0.875rem;
  margin-bottom: 0;
}

/* ---------- Link cards (index) ---------- */

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.875rem;
}

.card-link {
  display: block;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  text-decoration: none;
  color: var(--color-primary-dark);
  font-weight: 600;
  font-size: 1.0625rem;
  box-shadow: var(--shadow);
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
  position: relative;
}

.card-link::after {
  content: "→";
  position: absolute;
  right: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-accent);
  font-weight: 400;
}

.card-link:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-1px);
  color: var(--color-primary);
}

/* ---------- Button ---------- */

.btn {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.75rem 1.5rem;
  background-color: var(--color-primary);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: var(--radius);
  border: none;
  transition: background-color 0.15s;
  text-align: center;
}

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

/* ---------- Footer ---------- */

.site-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: 2rem 1.25rem;
  margin-top: auto;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  font-size: 0.875rem;
  line-height: 1.8;
}

.footer-inner a {
  color: #95d5b2;
  text-decoration: none;
}

.footer-inner a:hover {
  text-decoration: underline;
  color: #fff;
}

.footer-copyright {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(149, 213, 178, 0.25);
  color: rgba(216, 243, 220, 0.7);
  font-size: 0.8125rem;
}

/* ---------- Responsive ---------- */

@media (min-width: 480px) {
  .card-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    padding-top: 0.875rem;
    padding-bottom: 0.875rem;
  }

  .site-nav {
    width: 100%;
    gap: 0.5rem 1rem;
  }

  .page-title {
    font-size: 1.5rem;
  }

  .content-body {
    padding: 1.25rem 1rem;
  }
}