/* Minimal Material overrides for Vitruvyan KB.
   Keep behavior close to upstream Material to avoid regressions. */

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Inconsolata:wght@400;500;600;700&family=Libre+Baskerville:wght@400;700&display=swap");

:root {
  /* Login control follows navbar tabs typography. */
  --kb-login-font-size: var(--kb-tabs-font-size, 0.95rem);
  --kb-tabs-font-size: 0.95rem;
  --vit-font-sans: "Inter", system-ui, sans-serif;
  --vit-font-mono: "Inconsolata", ui-monospace, monospace;
  --vit-font-serif: "Libre Baskerville", Georgia, serif;
  --md-text-font-family: var(--vit-font-sans);
  --md-code-font-family: var(--vit-font-mono);
  --md-primary-fg-color: #ffffff;
  --md-primary-fg-color--light: #ffffff;
  --md-primary-fg-color--dark: #f5f5f2;
  --md-primary-bg-color: #1b1b18;
  --md-primary-bg-color--light: #6b6b63;
  --md-default-bg-color: #fafaf8;
  --md-default-fg-color: #1b1b18;
  --md-default-fg-color--light: #6b6b63;
  --md-default-fg-color--lighter: #a8a89e;
  --md-default-fg-color--lightest: #e8e5de;
  --md-accent-fg-color: #1b1b18;
  --md-accent-fg-color--transparent: rgba(27, 27, 24, 0.12);
  --md-typeset-a-color: #1b1b18;
  --md-typeset-color: #1b1b18;
  --md-typeset-table-color: rgba(27, 27, 24, 0.12);
  --md-typeset-table-color--light: rgba(27, 27, 24, 0.04);
  --md-footer-bg-color: #fafaf8;
  --md-footer-bg-color--dark: #f0ebe1;
  --md-footer-fg-color: #1b1b18;
  --md-footer-fg-color--light: #6b6b63;
  --md-footer-fg-color--lighter: #a8a89e;
}

body,
.md-header,
.md-tabs,
.md-nav,
.md-search__form,
.md-search__input,
.md-search-result,
.md-ellipsis,
.md-typeset,
.md-content,
.md-sidebar,
.md-nav__link,
.md-tab,
.md-header__topic,
.md-header__button {
  font-family: var(--vit-font-sans);
}

body {
  font-size: 1rem;
  line-height: 1.6;
}

code,
pre,
.md-typeset code,
.md-typeset pre,
.md-typeset kbd,
.md-search__input::placeholder {
  font-family: var(--vit-font-mono);
}

.md-typeset blockquote,
.md-typeset .admonition-title,
.md-typeset .tabbed-labels > label {
  font-family: var(--vit-font-sans);
}

.md-header {
  background: #ffffff !important;
  color: #1b1b18 !important;
  box-shadow: none;
  border-bottom: 1px solid #e8e5de;
}

.md-header__title,
.md-header__topic,
.md-header__button,
.md-header__option,
.md-search__icon,
.md-search__input,
.md-search__input::placeholder {
  color: #1b1b18;
}

.md-header__button.md-logo {
  padding-inline: 0 0.35rem;
}

.md-header__button.md-logo img,
.md-header__button.md-logo svg,
.md-logo img,
.md-logo svg {
  width: auto !important;
  height: 1.2rem !important;
  max-width: min(11rem, 24vw);
  filter: none;
}

/* Keep title as flex spacer so search + auth push to the right.
   visibility:hidden hides the text but preserves the flex grow space. */
.md-header__title {
  flex: 1 1 auto;
  min-width: 0;
  visibility: hidden;
}

.md-tabs {
  background: #ffffff !important;
  color: #1b1b18 !important;
  border-bottom: 1px solid #e8e5de;
}

.md-tabs__link {
  color: #6b6b63 !important;
}

/* Hover: subtle bg, always readable. Prevents Material dark-mode black flash. */
.md-tabs__link:hover,
.md-tabs__link:focus {
  background-color: rgba(27, 27, 24, 0.07) !important;
  color: #1b1b18 !important;
  opacity: 1 !important;
}

.md-tabs__link--active,
.md-tabs__link:hover,
.md-tabs__link:focus {
  color: #1b1b18 !important;
}

.md-header__source,
.md-header__option,
.md-tabs__link,
.md-tabs__item,
.md-nav__title,
.md-nav__button,
.md-nav__link,
.md-nav__item .md-nav__link,
.md-search__form,
.md-search__input,
.md-search__icon {
  color: #1b1b18 !important;
}

[data-md-color-primary="black"] .md-header,
[data-md-color-primary="black"] .md-tabs,
[data-md-color-primary="white"] .md-header,
[data-md-color-primary="white"] .md-tabs {
  background: #ffffff !important;
  color: #1b1b18 !important;
}

.md-search__form {
  background: rgba(240, 235, 225, 0.72);
  border: 1px solid #e8e5de;
  box-shadow: none;
}

.md-search__form:hover {
  background: rgba(240, 235, 225, 0.92);
}

.md-search__input + .md-search__icon {
  color: #6b6b63;
}

.md-main {
  background: #fafaf8;
}

.md-typeset h1,
.md-typeset h2,
.md-typeset h3,
.md-typeset h4,
.md-typeset h5,
.md-typeset h6 {
  font-family: var(--vit-font-sans);
  color: #1b1b18;
  letter-spacing: -0.02em;
}

.md-typeset h1 {
  font-size: 2.1rem;
  line-height: 1.08;
  font-weight: 700;
  margin: 0 0 1.1rem;
}

.md-typeset h2 {
  font-size: 1.38rem;
  line-height: 1.18;
  font-weight: 700;
  margin: 1.9rem 0 0.75rem;
}

.md-typeset h3 {
  font-size: 1.08rem;
  line-height: 1.24;
  font-weight: 600;
}

.md-typeset p,
.md-typeset li,
.md-typeset td,
.md-typeset th {
  font-family: var(--vit-font-serif);
  color: #1b1b18;
  font-size: 0.92rem;
  line-height: 1.58;
}

.md-typeset strong,
.md-typeset b,
.md-typeset summary,
.md-typeset .admonition-title,
.md-typeset .tabbed-labels > label {
  font-family: var(--vit-font-sans);
}

.md-typeset ul li::marker,
.md-typeset ol li::marker {
  color: #6b6b63;
}

.md-typeset a {
  color: #1b1b18;
  text-decoration-thickness: 0.06em;
  text-underline-offset: 0.12em;
  text-decoration-color: rgba(27, 27, 24, 0.45);
}

.md-typeset a:hover,
.md-typeset a:focus,
.md-nav__link:hover,
.md-nav__link:focus,
.md-nav__link--active {
  color: #1b1b18 !important;
  text-decoration-color: #1b1b18;
}

.md-content__button,
.md-content__button:hover,
.md-content__button:focus {
  color: #6b6b63 !important;
}

/* Top navigation tabs: force left alignment. */
.md-tabs__inner {
  justify-content: flex-start;
}

.md-tabs__list {
  justify-content: flex-start;
  margin-left: 0;
  margin-inline-start: 0;
  margin-inline-end: auto;
}

/* Keep active state visible when mega menu is open.
   bg = dark (#1b1b18), text = white — avoids dark-on-dark unreadable state. */
.md-tabs__item.kb-mega-tab--open > .md-tabs__link {
  background: var(--md-accent-fg-color) !important;
  color: #ffffff !important;
  opacity: 1 !important;
}

.md-sidebar {
  color: #1b1b18;
}

.md-sidebar__scrollwrap {
  scrollbar-color: #a8a89e #f0ebe1;
}

.md-sidebar__scrollwrap::-webkit-scrollbar {
  width: 10px;
}

.md-sidebar__scrollwrap::-webkit-scrollbar-track {
  background: #f0ebe1;
}

.md-sidebar__scrollwrap::-webkit-scrollbar-thumb {
  background: #a8a89e;
  border-radius: 999px;
}

.md-nav--secondary,
.md-sidebar--secondary .md-sidebar__inner,
.md-sidebar--secondary .md-nav {
  background: transparent !important;
}

.md-sidebar--secondary {
  border-left: 1px solid #e8e5de;
  padding-left: 1.25rem;
}

.md-sidebar .md-nav__title,
.md-sidebar .md-nav__title[for="__toc"],
.md-sidebar .md-nav__title[for="__drawer"] {
  background: transparent !important;
  box-shadow: none !important;
  color: #6b6b63 !important;
  font-family: var(--vit-font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 0.2rem 0 0.9rem;
}

.md-sidebar .md-nav__link,
.md-nav--secondary .md-nav__link,
.md-nav--primary .md-nav__link {
  background: transparent !important;
  color: #1b1b18 !important;
  font-family: var(--vit-font-sans);
  font-size: 0.82rem;
  line-height: 1.45;
}

.md-nav__item--active > .md-nav__link,
.md-sidebar .md-nav__link:hover,
.md-sidebar .md-nav__link:focus,
.md-nav--secondary .md-nav__link:hover,
.md-nav--secondary .md-nav__link:focus,
.md-nav--secondary .md-nav__link--active {
  background: transparent !important;
  color: #1b1b18 !important;
  text-decoration: underline;
  text-underline-offset: 0.16em;
}

.md-nav--secondary .md-nav__link--active::before,
.md-nav--secondary .md-nav__link:hover::before,
.md-nav--secondary .md-nav__link:focus::before {
  background: #1b1b18 !important;
}

/* Material header account dropdown (injected by vitruvyan.js). */
.kb-auth-controls-material {
  display: inline-flex;
  align-items: center;
  margin-left: 0.5rem;
  position: relative;
  z-index: 1200;
  font-size: var(--kb-login-font-size);
  font-family: var(--kb-tabs-font-family, inherit);
}

.kb-auth-controls-material__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2rem;
  min-width: 5.6rem;
  padding: 0.2rem 0.62rem;
  border: 1px solid var(--md-default-fg-color--lighter);
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
  border-radius: 0.2rem;
  font: inherit;
  cursor: pointer;
}

.kb-auth-controls-material__toggle:hover,
.kb-auth-controls-material__toggle:focus {
  border-color: var(--md-accent-fg-color);
}

.kb-auth-controls-material__menu {
  position: absolute;
  top: calc(100% + 0.35rem);
  right: 0;
  min-width: 15rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
  font-size: var(--kb-login-font-size);
  font-family: var(--kb-tabs-font-family, inherit);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition: opacity 120ms ease, transform 120ms ease;
}

.kb-auth-controls-material[data-open="true"] .kb-auth-controls-material__menu {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.kb-auth-controls-material__header {
  padding: 0.58rem 0.74rem 0.52rem;
  border-bottom: 1px solid var(--md-default-fg-color--lightest);
  font-weight: 700;
  color: var(--md-default-fg-color);
}

.kb-auth-controls-material__actions {
  display: flex;
  flex-direction: column;
}

.kb-auth-controls-material__item {
  display: flex;
  align-items: center;
  min-height: 2.05rem;
  padding: 0.42rem 0.74rem;
  border-top: 1px solid var(--md-default-fg-color--lightest);
  color: var(--md-default-fg-color);
  text-decoration: none;
}

.kb-auth-controls-material__item:hover,
.kb-auth-controls-material__item:focus {
  background: var(--md-default-fg-color--lightest);
}

.kb-auth-controls-material__item--danger {
  color: #c62828;
}

/* Desktop mega-menu styling (injected by vitruvyan.js). */
.kb-mega-menu {
  border-top: 1px solid var(--md-default-fg-color--lightest);
  border-bottom: 1px solid var(--md-default-fg-color--lightest);
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
  font-size: var(--kb-tabs-font-size, 1rem);
  font-family: var(--kb-tabs-font-family, inherit);
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity 140ms ease, transform 140ms ease;
  position: relative;
  z-index: 950;
}

.kb-mega-menu.is-open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.kb-mega-menu__inner {
  padding-top: 0.75rem;
  padding-bottom: 0.9rem;
}

.kb-mega-menu__title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--md-default-fg-color--light);
  margin-bottom: 0.55rem;
}

.kb-mega-menu__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 0.75rem 1rem;
}

.kb-mega-menu__col {
  border: 1px solid var(--md-default-fg-color--lightest);
  background: var(--md-default-bg-color);
  padding: 0.55rem 0.62rem 0.62rem;
}

.kb-mega-menu__heading {
  font-weight: 600;
  margin-bottom: 0.35rem;
  line-height: 1.25;
  color: var(--md-default-fg-color);
  font-size: var(--kb-tabs-font-size, 1rem);
  font-family: var(--kb-tabs-font-family, inherit);
}

.kb-mega-menu__desc {
  margin: 0 0 0.5rem 0;
  line-height: 1.25;
  color: var(--md-default-fg-color--light);
  font-size: var(--kb-tabs-font-size, 1rem);
  font-family: var(--kb-tabs-font-family, inherit);
}

.kb-mega-menu__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.kb-mega-menu__link {
  display: block;
  line-height: 1.3;
  color: var(--md-typeset-a-color);
  font-weight: 600;
  font-size: var(--kb-tabs-font-size, 1rem);
  font-family: var(--kb-tabs-font-family, inherit);
  text-decoration: none;
  padding: 0.24rem 0.1rem;
}

.kb-mega-menu__link-label {
  display: block;
}

.kb-mega-menu__link-desc {
  display: block;
  margin-top: 0.15rem;
  font-size: var(--kb-tabs-font-size, 1rem);
  line-height: 1.24;
  color: var(--md-default-fg-color--light);
  font-family: var(--kb-tabs-font-family, inherit);
}

.kb-mega-menu__link:hover,
.kb-mega-menu__link:focus {
  color: var(--md-accent-fg-color);
  text-decoration: underline;
  text-underline-offset: 0.14em;
}

@media screen and (max-width: 76.2344em) {
  .kb-mega-menu {
    display: none;
  }
}