:root {
  color-scheme: light;
  --note-bg: #f4f6f8;
  --note-surface: #ffffff;
  --note-text: #2c3e50;
  --note-muted: #6b7a8a;
  --note-border: #d1d9e0;
  --note-border-soft: #e4e9ee;
  --note-accent: #2a5caa;
  --note-accent-hover: #1f477f;
  --note-quote-bg: #f8fafc;
  --note-code-bg: #eceff1;
  --note-code-text: #263238;
  --note-table-head: #f1f4f7;
  --note-tag-bg: #eef3f8;
  --note-danger-bg: #f8ecea;
  --note-danger-text: #8a2e26;
  --note-danger-border: #d9a39e;
  --note-shadow: 0 18px 46px rgb(44 62 80 / 8%);
  --note-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --note-sans: system-ui, -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--note-bg);
  color: var(--note-text);
  font-family: var(--note-sans);
  line-height: 1.75;
}

body {
  min-width: 320px;
  margin: 0;
}

a {
  color: var(--note-accent);
  text-decoration: underline;
  text-decoration-thickness: 0.075em;
  text-underline-offset: 0.16em;
}

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

a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible {
  outline: 3px solid rgb(42 92 170 / 25%);
  outline-offset: 2px;
}

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

/* ---- Sidebar layout shell ---- */

:root {
  --note-sidebar-width: 220px;
}

.nav-toggle-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

/* ---- Dark mode toggle (CSS-only, checkbox-driven, floating button) ---- */

.theme-toggle-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.theme-toggle-input:checked ~ .mobile-topbar,
.theme-toggle-input:checked ~ .site-shell {
  --note-bg: #1a1d21;
  --note-surface: #23272c;
  --note-text: #e4e8ec;
  --note-muted: #9aa5b1;
  --note-border: #3a3f45;
  --note-border-soft: #2e3237;
  --note-accent: #6fa4e8;
  --note-accent-hover: #8fb9ee;
  --note-quote-bg: #262b31;
  --note-code-bg: #2b3036;
  --note-code-text: #dbe2e8;
  --note-table-head: #2a2f35;
  --note-tag-bg: #262b31;
  --note-danger-bg: #3a2422;
  --note-danger-text: #e2a29b;
  --note-danger-border: #6b3b36;
  --note-shadow: 0 18px 46px rgb(0 0 0 / 35%);
  background: var(--note-bg);
  color: var(--note-text);
}

.theme-toggle-input:checked ~ .theme-toggle {
  --note-bg: #1a1d21;
  --note-surface: #23272c;
  --note-text: #e4e8ec;
  --note-muted: #9aa5b1;
  --note-border: #3a3f45;
  --note-border-soft: #2e3237;
  --note-accent: #6fa4e8;
  --note-accent-hover: #8fb9ee;
  --note-quote-bg: #262b31;
  --note-shadow: 0 18px 46px rgb(0 0 0 / 35%);
}

.theme-toggle {
  display: flex;
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 20;
}

.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  padding: 0;
  background: var(--note-surface);
  border: 1px solid var(--note-border);
  border-radius: 4px;
  box-shadow: var(--note-shadow);
  color: var(--note-muted);
  cursor: pointer;
  position: relative;
}

.theme-toggle-btn:hover {
  color: var(--note-accent);
  border-color: var(--note-accent);
}

.theme-toggle-icon {
  position: absolute;
}

.theme-toggle-icon--moon {
  display: none;
}

.theme-toggle-input:checked ~ .theme-toggle .theme-toggle-icon--sun {
  display: none;
}

.theme-toggle-input:checked ~ .theme-toggle .theme-toggle-icon--moon {
  display: block;
}

.site-shell {
  display: flex;
  align-items: flex-start;
  min-height: 100vh;
}

.site-sidebar {
  width: var(--note-sidebar-width);
  flex: 0 0 var(--note-sidebar-width);
  box-sizing: border-box;
  min-height: 100vh;
  padding: 2.25rem 1.5rem;
  background: var(--note-surface);
  border-right: 1px solid var(--note-border);
}

.site-brand {
  margin-bottom: 1.75rem;
}

.site-title {
  color: var(--note-text);
  display: inline-block;
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3;
  text-decoration: none;
}

.site-title:hover,
.site-title:visited {
  color: var(--note-text);
}

.site-description {
  color: var(--note-muted);
  font-size: 0.9rem;
  margin: 0.5rem 0 0;
}

.site-nav {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.site-nav a {
  color: var(--note-muted);
  border-radius: 4px;
  padding: 0.5rem 0.6rem;
  margin: 0 -0.6rem;
  text-decoration: none;
  font-size: 0.95rem;
}

.site-nav a:hover {
  color: var(--note-accent);
  background: var(--note-quote-bg);
}

.site-content {
  flex: 1 1 auto;
  min-width: 0;
}

.site-main {
  padding: 2.5rem 0 3.25rem;
}

/* ---- Mobile top bar (site name / description) ---- */

.mobile-topbar {
  display: none;
}

/* ---- Mobile nav toggle ---- */

.nav-toggle-btn {
  display: none;
  align-items: center;
  justify-content: center;
  position: fixed;
  top: 0.9rem;
  right: 0.9rem;
  width: 42px;
  height: 42px;
  background: var(--note-surface);
  border: 1px solid var(--note-border);
  border-radius: 4px;
  box-shadow: var(--note-shadow);
  cursor: pointer;
  z-index: 30;
}

.nav-toggle-btn span,
.nav-toggle-btn span::before,
.nav-toggle-btn span::after {
  background: currentColor;
  color: var(--note-muted);
  content: "";
  display: block;
  height: 2px;
  width: 18px;
}

.nav-toggle-btn span {
  position: relative;
}

.nav-toggle-btn span::before,
.nav-toggle-btn span::after {
  left: 0;
  position: absolute;
}

.nav-toggle-btn span::before {
  top: -6px;
}

.nav-toggle-btn span::after {
  top: 6px;
}

.nav-toggle-input:checked ~ .nav-toggle-btn {
  color: var(--note-accent);
  border-color: var(--note-accent);
}

.nav-overlay {
  display: none;
}

.page-card,
.page-list,
.search-page,
.tag-index,
.tag-page {
  max-width: 720px;
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 2.4rem);
  background: var(--note-surface);
  border: 1px solid var(--note-border);
  box-shadow: var(--note-shadow);
}

.breadcrumbs {
  color: var(--note-muted);
  font-size: 0.86rem;
  margin: 0 0 1.4rem;
}

.breadcrumbs a {
  color: var(--note-muted);
  text-decoration: none;
}

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

.page-header {
  border-bottom: 1px solid var(--note-border-soft);
  margin: 0 0 1.8rem;
  padding-bottom: 1.2rem;
}

.page-title {
  color: var(--note-text);
  font-size: clamp(1.8rem, 4vw, 2.45rem);
  line-height: 1.28;
  margin: 0;
}

.page-description {
  color: var(--note-muted);
  font-size: 1rem;
  margin: 0.75rem 0 0;
}

.page-description:empty {
  display: none;
}

.page-meta {
  color: var(--note-muted);
  display: flex;
  flex-wrap: wrap;
  font-family: var(--note-mono);
  font-size: 0.82rem;
  gap: 0.35rem 0.8rem;
  margin: 0.65rem 0 0;
}

.page-content {
  font-size: 1rem;
}

.page-content > :first-child {
  margin-top: 0;
}

.page-content > :last-child {
  margin-bottom: 0;
}

.page-content h1,
.page-content h2,
.page-content h3,
.page-content h4,
.page-content h5,
.page-content h6 {
  color: var(--note-text);
  line-height: 1.35;
}

.page-content h1 {
  border-bottom: 1px solid var(--note-border-soft);
  font-size: 1.65rem;
  margin: 2.2rem 0 1rem;
  padding-bottom: 0.35rem;
}

.page-content h2 {
  background: var(--note-quote-bg);
  border-left: 4px solid var(--note-accent);
  font-size: 1.35rem;
  margin: 2rem 0 0.9rem;
  padding: 0.28rem 0 0.28rem 0.75rem;
}

.page-content h3 {
  font-size: 1.12rem;
  margin: 1.6rem 0 0.7rem;
}

.page-content h4,
.page-content h5,
.page-content h6 {
  font-size: 1rem;
  margin: 1.4rem 0 0.55rem;
}

.page-content p,
.page-content ul,
.page-content ol,
.page-content blockquote,
.page-content pre,
.page-content .table-scroll,
.page-content table {
  margin: 0 0 1.4em;
}

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

.page-content li {
  margin: 0.28rem 0;
}

.page-content li::marker {
  color: var(--note-accent);
}

.page-content blockquote {
  background: var(--note-quote-bg);
  border-left: 3px solid var(--note-accent);
  color: var(--note-text);
  margin-left: 0;
  margin-right: 0;
  padding: 0.9rem 1rem;
}

.page-content code {
  background: var(--note-code-bg);
  border-radius: 3px;
  color: var(--note-code-text);
  font-family: var(--note-mono);
  font-size: 0.92em;
  padding: 0.1em 0.35em;
}

.page-content pre {
  background: var(--note-code-bg);
  border: 1px solid var(--note-border);
  border-radius: 4px;
  color: var(--note-code-text);
  overflow-x: auto;
  padding: 1rem;
}

.page-content pre code {
  background: transparent;
  color: inherit;
  padding: 0;
}

.page-content .table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-content .table-scroll table {
  margin: 0;
}

.page-content table {
  border-collapse: collapse;
  font-size: 0.94rem;
  min-width: 640px;
  width: 100%;
}

.page-content th,
.page-content td {
  border: 1px solid var(--note-border);
  padding: 0.58rem 0.7rem;
  text-align: left;
  vertical-align: top;
}

.page-content th {
  background: var(--note-table-head);
  color: var(--note-text);
  font-weight: 700;
}

.page-content th.align-center,
.page-content td.align-center {
  text-align: center;
}

.page-content th.align-right,
.page-content td.align-right {
  text-align: right;
}

.page-content img {
  border: 1px solid var(--note-border);
  border-radius: 3px;
  display: block;
  margin: 1.4rem auto;
}

.image-missing {
  background: var(--note-danger-bg);
  border: 1px dashed var(--note-danger-border);
  border-radius: 3px;
  color: var(--note-danger-text);
  display: inline-block;
  font-size: 0.9em;
  padding: 0.25rem 0.45rem;
}

hr {
  border: 0;
  border-top: 1px solid var(--note-border-soft);
  margin: 2rem 0;
}

.page-tags {
  border-top: 1px solid var(--note-border-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 2rem;
  padding-top: 1.15rem;
}

.tag-link,
.page-tags a {
  align-items: center;
  background: var(--note-tag-bg);
  border: 1px solid var(--note-border);
  border-radius: 4px;
  color: var(--note-accent);
  display: inline-flex;
  font-family: var(--note-mono);
  font-size: 0.82rem;
  line-height: 1.4;
  min-height: 1.85rem;
  padding: 0.22rem 0.55rem;
  text-decoration: none;
}

.tag-link:hover,
.page-tags a:hover {
  border-color: var(--note-accent);
  color: var(--note-accent-hover);
}

.tag-index ul,
.tag-page-list,
.search-results,
.page-list-items {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
}

.tag-index li {
  align-items: center;
  display: inline-flex;
  gap: 0.45rem;
  margin: 0 0.45rem 0.55rem 0;
}

.tag-count {
  color: var(--note-muted);
  font-family: var(--note-mono);
  font-size: 0.8rem;
}

.tag-page-list li,
.search-results li,
.page-list-items li {
  border-bottom: 1px solid var(--note-border-soft);
  padding: 0.95rem 0;
}

.tag-page-list li:last-child,
.search-results li:last-child,
.page-list-items li:last-child {
  border-bottom: 0;
}

.tag-page-list a,
.search-results a,
.page-list-items a {
  color: var(--note-text);
  font-weight: 700;
  text-decoration: none;
}

.tag-page-list a:hover,
.search-results a:hover,
.page-list-items a:hover {
  color: var(--note-accent);
}

.tag-page-list p,
.search-results p {
  color: var(--note-muted);
  margin: 0.25rem 0 0;
}

.folder-page-list .page-list-items {
  margin-top: 0.75rem;
}

.folder-page-list .page-list-items li {
  padding: 0.32rem 0;
}

.folder-page-summary { color: var(--note-muted); font-family: var(--note-mono); font-size: 0.8rem; }
.folder-pagination { display: grid; grid-template-columns: minmax(4.5rem, 1fr) auto minmax(4.5rem, 1fr); align-items: center; gap: 0.8rem; margin-top: 1.4rem; font-family: var(--note-mono); font-size: 0.82rem; }
.folder-pagination > a, .folder-pagination > span { padding: 0.4rem 0.65rem; border: 1px solid var(--note-border); border-radius: 4px; text-align: center; text-decoration: none; }
.folder-pagination-prev { justify-self: start; }
.folder-pagination-next { justify-self: end; }
.folder-pagination .is-disabled { color: var(--note-muted); background: var(--note-surface); }
.folder-pagination-pages { display: flex; align-items: center; justify-content: center; gap: 0.25rem; margin: 0; padding: 0; list-style: none; }
.folder-pagination-pages a, .folder-pagination-pages span { display: grid; min-width: 2rem; height: 2rem; padding: 0 0.25rem; place-items: center; border-radius: 4px; text-decoration: none; }
.folder-pagination-pages span[aria-current="page"] { color: #fff; background: var(--note-accent); }
.folder-pagination-ellipsis { color: var(--note-muted); }

.search-form {
  display: flex;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.search-form label {
  align-self: center;
  color: var(--note-muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.search-form input[type="search"] {
  background: var(--note-surface);
  border: 1px solid var(--note-border);
  border-radius: 4px;
  color: var(--note-text);
  flex: 1;
  font: inherit;
  min-width: 0;
  padding: 0.68rem 0.78rem;
}

.search-form input[type="search"]:focus {
  border-color: var(--note-accent);
  box-shadow: 0 0 0 3px rgb(42 92 170 / 14%);
  outline: none;
}

.search-form button {
  background: var(--note-accent);
  border: 1px solid var(--note-accent);
  border-radius: 4px;
  color: #ffffff;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  padding: 0.68rem 1rem;
}

.search-form button:hover {
  background: var(--note-accent-hover);
  border-color: var(--note-accent-hover);
}

.search-summary {
  color: var(--note-muted);
}

.wiki-link {
  text-decoration-thickness: 0.08em;
}

.wiki-link.is-broken,
.tomos-missing-link {
  color: inherit;
  text-decoration: underline dotted;
  text-underline-offset: 0.18em;
}

.site-footer {
  border-top: 1px solid var(--note-border);
  color: var(--note-muted);
  font-size: 0.84rem;
  padding: 1.4rem 0 2.2rem;
  text-align: center;
}

.site-footer p {
  line-height: 1.3;
  margin: 0;
}

@media (max-width: 760px) {
  .mobile-topbar {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    z-index: 26;
    background: var(--note-surface);
    border-bottom: 1px solid var(--note-border);
    box-shadow: var(--note-shadow);
    padding: 0.5rem 4.5rem 0.5rem 1rem;
    box-sizing: border-box;
    overflow: hidden;
  }

  .mobile-topbar .site-title {
    font-size: 1.05rem;
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .mobile-topbar .site-description {
    font-size: 0.78rem;
    margin: 0.15rem 0 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .nav-toggle-btn {
    display: inline-flex;
    top: 7px;
    z-index: 30;
  }

  .site-shell {
    display: block;
    min-height: 0;
  }

  .site-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(80%, 300px);
    flex: none;
    min-height: 100vh;
    padding: 3.75rem 1.5rem 1.5rem;
    box-shadow: var(--note-shadow);
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    z-index: 25;
    overflow-y: auto;
  }

  .site-sidebar .site-brand {
    display: none;
  }

  .nav-toggle-input:checked ~ .site-shell .site-sidebar {
    transform: translateX(0);
  }

  .nav-overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgb(44 62 80 / 35%);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    z-index: 24;
  }

  .nav-toggle-input:checked ~ .nav-overlay {
    opacity: 1;
    pointer-events: auto;
  }

  .site-content {
    width: min(100% - 28px, 720px);
    margin: 0 auto;
  }

  .site-main {
    padding: calc(56px + 1.5rem) 0 2rem;
  }

  .page-card,
  .page-list,
  .search-page,
  .tag-index,
  .tag-page {
    border-left: 0;
    border-right: 0;
    box-shadow: none;
    padding: 1.35rem 16px;
  }

  .page-content ul,
  .page-content ol {
    padding-left: 1.25rem;
  }

  .search-form {
    flex-direction: column;
  }

  .search-form label {
    align-self: flex-start;
  }

  .folder-pagination { grid-template-columns: 1fr 1fr; }
  .folder-pagination-pages { grid-column: 1 / -1; grid-row: 1; }
}

@media (max-width: 560px) {
  .site-content {
    width: 100%;
  }

  .site-footer {
    margin-left: 16px;
    margin-right: 16px;
  }
}

.page-content .youtube-embed {
  width: 100%;
  aspect-ratio: 16 / 9;
  margin: 1.5em 0;
}

.page-content .youtube-embed iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}