:root {
  color-scheme: light dark;
  --page-bg: var(--kata-color-background, #f4f7fb);
  --surface: var(--kata-color-surface, #ffffff);
  --surface-muted: var(--kata-color-surface-muted, #eef3f9);
  --text: var(--kata-color-text, #172033);
  --muted: var(--kata-color-text-muted, #5c687d);
  --border: var(--kata-color-border, #d7dfeb);
  --accent: var(--kata-color-primary, #2457d6);
  --accent-strong: var(--kata-color-primary, #173fa9);
  --shadow: var(--kata-shadow-md, 0 18px 50px rgba(31, 50, 81, 0.08));
  --header-text: #ffffff;
  --header-lead: rgba(255, 255, 255, 0.86);
  --header-link-border: rgba(255, 255, 255, 0.35);
  --header-link-hover: rgba(255, 255, 255, 0.12);
  --header-decoration: rgba(255, 255, 255, 0.28);
  --header-background:
    radial-gradient(circle at 82% 20%, rgba(100, 170, 255, 0.4), transparent 30%),
    linear-gradient(135deg, #0333c4a4, #3162dfa9 58%, #93c5fa81);
}

:root[data-theme="facility"],
:root[data-theme="winforms"] {
  --header-text: var(--kata-color-text);
  --header-lead: var(--kata-color-text-muted);
  --header-link-border: var(--kata-color-border);
  --header-link-hover: var(--kata-color-secondary);
  --header-decoration: var(--kata-color-border);
  --header-background: var(--kata-color-surface-muted);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--page-bg);
  color: var(--text);
  font-family: var(--kata-font-family, Inter, "Noto Sans JP", system-ui, sans-serif);
  line-height: var(--kata-line-height-content, 1.7);
}

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

.skip-link {
  position: fixed;
  z-index: 10;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.9rem;
  border-radius: 0.5rem;
  background: var(--surface);
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: relative;
  overflow: hidden;
  padding: 5rem 1.5rem 4.5rem;
  color: var(--header-text);
  background: var(--header-background);
}

.site-header::after {
  position: absolute;
  right: -5rem;
  bottom: -8rem;
  width: 22rem;
  height: 22rem;
  border: 1px solid var(--header-decoration);
  border-radius: 50%;
  content: "";
}

.site-header__content,
.catalog,
footer {
  width: min(1180px, calc(100% - 2rem));
  margin-inline: auto;
}

.eyebrow {
  margin: 0 0 0.4rem;
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.site-header h1 {
  max-width: 800px;
  margin: 0;
  font-size: clamp(2.4rem, 7vw, 5rem);
  line-height: 1.05;
  letter-spacing: -0.05em;
}

.lead {
  max-width: 760px;
  margin: 1.5rem 0 0;
  color: var(--header-lead);
  font-size: clamp(1rem, 2vw, 1.2rem);
}

.header-links,
.component-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.header-links { margin-top: 2rem; }

.header-links a {
  padding: var(--kata-space-md) var(--kata-space-lg);
  border: 1px solid var(--header-link-border);
  border-radius: var(--kata-radius-pill);
  color: var(--header-text);
  text-decoration: none;
}

.header-links a:hover { background: var(--header-link-hover); }

.theme-control {
  display: inline-grid;
  gap: var(--kata-space-sm);
  margin-top: var(--kata-space-xl);
  font-size: var(--kata-font-size-sm);
  font-weight: 700;
}

.theme-control select {
  min-width: 10rem;
  margin: 0;
}

.catalog { padding-block: 4rem; }

.catalog > section + section { margin-top: 5rem; }

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.7fr);
  gap: calc(2 * var(--kata-space-xl));
  align-items: end;
  margin-bottom: var(--kata-space-3xl);
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.65rem);
  letter-spacing: -0.035em;
}

.section-heading > p { margin: 0; color: var(--muted); }

.component-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--kata-space-xl);
}

.component-card {
  min-width: 0;
  border: 1px solid var(--border);
  border-radius: var(--kata-radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.component-card--wide { grid-column: 1 / -1; }

.component-card details { padding: var(--kata-space-2xl); }

.component-card summary {
  display: flex;
  flex-wrap: wrap;
  gap: var(--kata-space-md) var(--kata-space-xl);
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: var(--kata-font-size-lg);
  font-weight: 720;
}

.component-card summary::marker { color: var(--accent); }

.component-card summary code {
  padding: var(--kata-space-sm) var(--kata-space-md);
  border-radius: var(--kata-radius-md);
  background: var(--surface-muted);
  color: var(--accent-strong);
  font-size: var(--kata-font-size-xs);
  font-weight: 600;
}

.component-card details > p {
  margin: var(--kata-space-xl) 0 var(--kata-space-lg);
  color: var(--muted);
}

.component-links { margin-bottom: var(--kata-space-xl); }

.component-links a {
  font-size: var(--kata-font-size-sm);
  font-weight: 650;
  text-underline-offset: 0.2em;
}

iframe {
  display: block;
  width: 100%;
  min-height: 300px;
  border: 1px solid var(--border);
  border-radius: var(--kata-radius-lg);
  background: #ffffff;
}

.component-frame--tall { min-height: 520px; }

footer {
  padding-block: 1rem 3rem;
  color: var(--muted);
  text-align: center;
}

:root[data-theme="dark"] {
  --shadow: 0 18px 50px rgb(0 0 0 / 0.35);
}

:root[data-theme="facility"] .site-header,
:root[data-theme="winforms"] .site-header {
  padding: calc(2 * var(--kata-space-3xl)) var(--kata-space-3xl);
  border-bottom: 1px solid var(--border);
}

:root[data-theme="facility"] .catalog,
:root[data-theme="winforms"] .catalog {
  padding-block: calc(2 * var(--kata-space-3xl));
}

:root[data-theme="facility"] .catalog > section + section,
:root[data-theme="winforms"] .catalog > section + section {
  margin-top: calc(2 * var(--kata-space-3xl));
}

@media (max-width: 760px) {
  .site-header { padding-block: 3.5rem; }
  .section-heading { grid-template-columns: 1fr; gap: 0.6rem; }
  .component-grid { grid-template-columns: 1fr; }
  .component-card--wide { grid-column: auto; }
  iframe { min-height: 360px; }
}

/* Documentation reader */
.docs-page { min-height: 100vh; }

.docs-header {
  position: sticky;
  z-index: 5;
  top: 0;
  display: flex;
  gap: var(--kata-space-xl);
  align-items: center;
  min-height: 4rem;
  padding: var(--kata-space-md) max(1rem, calc((100vw - 1280px) / 2));
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  backdrop-filter: blur(12px);
}

.docs-brand {
  color: var(--text);
  font-size: var(--kata-font-size-lg);
  font-weight: 800;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.docs-header__links {
  display: flex;
  gap: var(--kata-space-lg);
  margin-left: auto;
}

.docs-header__links a { font-weight: 650; }

.docs-theme-control {
  grid-template-columns: auto minmax(7rem, 9rem);
  align-items: center;
  margin-top: 0;
}

.docs-layout {
  display: grid;
  grid-template-columns: minmax(13rem, 17rem) minmax(0, 54rem);
  gap: clamp(2rem, 6vw, 6rem);
  justify-content: center;
  width: min(1280px, calc(100% - 2rem));
  margin-inline: auto;
  padding-block: clamp(2rem, 5vw, 4rem);
}

.docs-sidebar {
  position: sticky;
  top: 6rem;
  align-self: start;
  max-height: calc(100vh - 7rem);
  overflow-y: auto;
  padding-right: var(--kata-space-xl);
}

.docs-sidebar nav { display: grid; gap: var(--kata-space-sm); }

.docs-sidebar nav a {
  padding: var(--kata-space-sm) var(--kata-space-md);
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: var(--kata-font-size-sm);
  text-decoration: none;
}

.docs-sidebar nav a:hover {
  border-left-color: var(--accent);
  color: var(--text);
}

.docs-sidebar nav a[aria-current="page"] {
  border-left-color: var(--accent);
  background: var(--surface-muted);
  color: var(--text);
  font-weight: 700;
}

.docs-sidebar__heading {
  margin: var(--kata-space-2xl) 0 var(--kata-space-sm);
  font-size: var(--kata-font-size-sm);
  font-weight: 750;
}

.docs-toc__nested { margin-left: var(--kata-space-lg); }

.docs-document { min-width: 0; }

.docs-status {
  padding: var(--kata-space-lg);
  border: 1px solid var(--border);
  border-radius: var(--kata-radius-md);
  background: var(--surface-muted);
}

.docs-status--error { border-color: var(--kata-color-danger); }

.docs-raw-link {
  margin-top: calc(2 * var(--kata-space-3xl));
  padding-top: var(--kata-space-xl);
  border-top: 1px solid var(--border);
  font-size: var(--kata-font-size-sm);
}

.markdown-body {
  font-size: var(--kata-font-size-md);
  line-height: max(1.65, var(--kata-line-height-content));
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  color: var(--text);
  line-height: 1.25;
  scroll-margin-top: 6rem;
}

.markdown-body h1 {
  margin: 0 0 1.5rem;
  font-size: clamp(2rem, 5vw, 3.5rem);
  letter-spacing: -0.04em;
}

.markdown-body h2 {
  margin: 3rem 0 1rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--border);
  font-size: clamp(1.45rem, 3vw, 2rem);
}

.markdown-body h3 { margin: 2rem 0 0.75rem; }

.markdown-body p,
.markdown-body ul,
.markdown-body ol,
.markdown-body blockquote { max-width: 75ch; }

.markdown-body li + li { margin-top: var(--kata-space-sm); }

.markdown-body table {
  display: block;
  width: max-content;
  max-width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
}

.markdown-body th,
.markdown-body td {
  padding: var(--kata-space-md) var(--kata-space-lg);
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.markdown-body th { background: var(--surface-muted); }

.markdown-body pre {
  max-width: 100%;
  overflow-x: auto;
  padding: var(--kata-space-xl);
  border: 1px solid var(--border);
  border-radius: var(--kata-radius-md);
  background: var(--surface-muted);
}

.markdown-body :not(pre) > code {
  padding: 0.1em 0.3em;
  border-radius: var(--kata-radius-sm);
  background: var(--surface-muted);
}

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

.markdown-body blockquote {
  margin-left: 0;
  padding-left: var(--kata-space-xl);
  border-left: 3px solid var(--accent);
  color: var(--muted);
}

@media (max-width: 820px) {
  .docs-header { flex-wrap: wrap; }
  .docs-header__links { margin-left: 0; }
  .docs-theme-control { width: 100%; }
  .docs-layout { grid-template-columns: 1fr; }
  .docs-sidebar { position: static; max-height: none; }
  .docs-toc { display: none; }
}