/* Kerbalism documentation — restrained aerospace UI */

:root {
  --md-grid-width: 78rem;
  --kb-radius: 0.5rem;
  --kb-radius-sm: 0.3rem;
  /* Light mode keeps a restrained teal; dark mode overrides to steel blue */
  --kb-accent: #187f88;
  --kb-accent-bright: #3aa8b0;
  --kb-accent-rgb: 58 168 176;
  --kb-cyan: var(--kb-accent);
  --kb-cyan-bright: var(--kb-accent-bright);
  --kb-amber: #e5a424;
  --kb-dark: #080d16;
  --kb-dark-2: #0d1421;
  --kb-dark-3: #131d2c;
}

/* Color systems */
[data-md-color-scheme="default"] {
  --md-default-bg-color: #f6f8fa;
  --md-default-bg-color--light: #fbfcfd;
  --md-default-bg-color--lighter: #ffffff;
  --md-default-bg-color--lightest: #ffffff;
  --md-default-fg-color: #17212b;
  --md-default-fg-color--light: #4c5b68;
  --md-default-fg-color--lighter: #71808d;
  --md-code-bg-color: #edf1f4;
  --md-code-fg-color: #263441;
  --md-typeset-a-color: #087d80;
  --md-footer-bg-color: #101820;
  --md-footer-bg-color--dark: #0a1016;
  --kb-surface: #ffffff;
  --kb-surface-raised: #ffffff;
  --kb-border: #dce3e8;
  --kb-border-strong: #cbd5dc;
  --kb-muted-surface: #f0f4f6;
  --kb-shadow: 0 8px 28px rgb(23 33 43 / 7%);
}

[data-md-color-scheme="slate"] {
  --kb-accent: #8aa4bd;
  --kb-accent-bright: #b7c9db;
  --kb-accent-rgb: 138 164 189;
  --kb-cyan: var(--kb-accent);
  --kb-cyan-bright: var(--kb-accent-bright);
  --md-default-bg-color: #101824;
  --md-default-bg-color--light: #15202d;
  --md-default-bg-color--lighter: #1a2736;
  --md-default-bg-color--lightest: #213143;
  --md-default-fg-color: #f1f5f9;
  --md-default-fg-color--light: #c7d1dc;
  --md-default-fg-color--lighter: #9aa9b8;
  --md-code-bg-color: #172230;
  --md-code-fg-color: #edf3f7;
  --md-typeset-a-color: #b7c9db;
  --md-footer-bg-color: #0b121b;
  --md-footer-bg-color--dark: #070c12;
  --kb-surface: #172230;
  --kb-surface-raised: #1b2939;
  --kb-border: #314154;
  --kb-border-strong: #43566b;
  --kb-muted-surface: #1c2a39;
  --kb-shadow: 0 12px 32px rgb(0 0 0 / 24%);
}

/* Page background */
.md-main {
  background: var(--md-default-bg-color);
}

.md-main__inner {
  margin-top: 1.35rem;
}

.md-content__inner {
  padding-top: 0.5rem;
  padding-bottom: 2.5rem;
}

/* Header and primary navigation — always dark aerospace chrome */
.md-header {
  color: #eef6f7;
  background: #070c12;
  border-bottom: 1px solid rgb(var(--kb-accent-rgb) / 32%);
  box-shadow: 0 8px 28px rgb(0 0 0 / 35%);
  backdrop-filter: blur(12px);
}

.md-header__title {
  color: #f3fafb;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.md-header__button {
  color: #d7e6ea;
}

.md-header__button:hover {
  color: var(--kb-accent-bright);
}

.md-header__button.md-logo {
  color: var(--kb-cyan-bright);
}

.md-header .md-source {
  color: #d7e6ea;
}

.md-header .md-source:hover {
  color: var(--kb-accent-bright);
}

/* Repo stats (stars/forks) — Material lets the 1st fact flex-shrink away */
.md-header__source {
  width: auto;
  min-width: 8.5rem;
  max-width: 16rem;
}

.md-source__repository {
  max-width: none;
  overflow: visible;
}

.md-source__repository--active .md-source__facts,
.md-source__facts {
  height: 0.65rem !important;
  overflow: visible !important;
  opacity: 0.9;
  animation: none !important;
}

.md-source__repository--active .md-source__fact,
.md-source__fact {
  flex-shrink: 0 !important;
  overflow: visible !important;
  opacity: 1 !important;
  transform: none !important;
  animation: none !important;
}

.md-tabs {
  background: #0b1219;
  border-bottom: 1px solid rgb(var(--kb-accent-rgb) / 22%);
}

.md-tabs__link {
  margin-top: 0.55rem;
  font-size: 0.68rem;
  font-weight: 550;
  color: #dce6ec;
  opacity: 0.9;
  transition: color 150ms ease, opacity 150ms ease;
}

.md-tabs__link:hover,
.md-tabs__link--active {
  color: var(--kb-accent-bright);
  opacity: 1;
}

.md-search__form {
  border: 1px solid rgb(255 255 255 / 22%);
  border-radius: 0.4rem;
  background: rgb(255 255 255 / 8%);
  box-shadow: none;
}

.md-search__form:hover {
  border-color: rgb(var(--kb-accent-rgb) / 40%);
  background: rgb(255 255 255 / 11%);
}

.md-search__input,
.md-search__input::placeholder,
.md-search__icon {
  color: #d7e6ea;
}

.md-search__input:focus {
  outline: none;
}

/* Expanded search — one dark panel, not form + mismatched dropdown */
@media screen and (min-width: 60em) {
  [data-md-toggle="search"]:checked ~ .md-header .md-search__inner {
    border-radius: 0.5rem;
    box-shadow: 0 16px 40px rgb(0 0 0 / 45%);
  }

  [data-md-toggle="search"]:checked ~ .md-header .md-search__form {
    border: 1px solid rgb(var(--kb-accent-rgb) / 34%);
    border-bottom-color: rgb(var(--kb-accent-rgb) / 16%);
    border-radius: 0.5rem 0.5rem 0 0;
    background: #0f1a24;
    color: #eef6f7;
    box-shadow: none;
  }

  [data-md-toggle="search"]:checked ~ .md-header .md-search__input,
  [data-md-toggle="search"]:checked ~ .md-header .md-search__input + .md-search__icon,
  [data-md-toggle="search"]:checked ~ .md-header .md-search__options .md-search__icon {
    color: #d7e6ea;
  }

  [data-md-toggle="search"]:checked ~ .md-header .md-search__output {
    border: 1px solid rgb(var(--kb-accent-rgb) / 34%);
    border-top: 0;
    border-radius: 0 0 0.5rem 0.5rem;
    box-shadow: none;
    overflow: hidden;
  }

  [data-md-toggle="search"]:checked ~ .md-header .md-search__scrollwrap {
    width: 100%;
    max-width: none;
    background: #121f2b;
  }

  .md-search-result__meta {
    border-bottom: 1px solid rgb(var(--kb-accent-rgb) / 12%);
    background: #0f1a24;
    color: #9eb0bf;
  }

  .md-search-result__item {
    box-shadow: 0 -1px 0 rgb(var(--kb-accent-rgb) / 10%);
  }

  .md-search-result__link:focus,
  .md-search-result__link:hover {
    background: rgb(var(--kb-accent-rgb) / 10%);
  }

  .md-search-result mark {
    color: var(--kb-accent-bright);
  }
}

@media screen and (max-width: 59.984375em) {
  [data-md-toggle="search"]:checked ~ .md-header .md-search__form {
    border: 0;
    border-radius: 0;
    background: #0f1a24;
    color: #eef6f7;
  }

  [data-md-toggle="search"]:checked ~ .md-header .md-search__scrollwrap {
    background: #121f2b;
  }
}

/* Language switcher — match dark header (not page light surface) */
.md-header .md-select {
  z-index: 2;
}

.md-header .md-select__inner {
  left: auto;
  right: 0;
  top: calc(100% - 0.15rem); /* overlap button so hover doesn't drop */
  min-width: 7.5rem;
  margin-top: 0;
  padding: 0.45rem 0.3rem 0.3rem;
  overflow: hidden;
  border: 1px solid rgb(var(--kb-accent-rgb) / 28%);
  border-radius: 0.45rem;
  background: #142630;
  color: #e8eef3;
  box-shadow: 0 10px 28px rgb(0 0 0 / 35%);
  transform: translate3d(0, 0.25rem, 0);
  /* Collapsed menu still overlays the tabs; ignore it until open */
  pointer-events: none;
  visibility: hidden;
}

.md-header .md-select:focus-within .md-select__inner,
.md-header .md-select:hover .md-select__inner {
  transform: translate3d(0, 0, 0);
  pointer-events: auto;
  visibility: visible;
}

.md-header .md-select__inner:after {
  left: auto;
  right: 0.85rem;
  margin-left: 0;
  border-bottom-color: #142630;
}

.md-header .md-select__list {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  border-radius: 0.3rem;
  font-size: 0.72rem;
}

.md-header .md-select__item {
  line-height: 1.45rem;
}

.md-header .md-select__link {
  padding: 0.32rem 0.75rem;
  border-radius: 0.28rem;
  color: #d3dde5;
  font-weight: 550;
  transition: background-color 130ms ease, color 130ms ease;
}

.md-header .md-select__link:hover,
.md-header .md-select__link:focus {
  color: var(--kb-accent-bright);
  background: rgb(var(--kb-accent-rgb) / 12%);
}

.md-header .md-select__item--active .md-select__link,
.md-header .md-select__link[aria-current="true"] {
  color: var(--kb-accent-bright);
  background: rgb(var(--kb-accent-rgb) / 16%);
}

/* Typography */
.md-typeset {
  color: var(--md-default-fg-color);
  font-size: 0.8rem;
  line-height: 1.72;
}

.md-typeset h1,
.md-typeset h2,
.md-typeset h3,
.md-typeset h4 {
  color: var(--md-default-fg-color);
  font-weight: 700;
  letter-spacing: -0.025em;
}

[data-md-color-scheme="slate"] .md-typeset {
  color: #e5edf4;
}

[data-md-color-scheme="slate"] .md-typeset h1 {
  color: #ffffff;
  text-shadow: 0 1px 18px rgb(var(--kb-accent-rgb) / 10%);
}

[data-md-color-scheme="slate"] .md-typeset h2 {
  color: #f4f8fb;
  border-bottom-color: #3b4d61;
}

[data-md-color-scheme="slate"] .md-typeset h3,
[data-md-color-scheme="slate"] .md-typeset h4 {
  color: #d5e0eb;
}

.md-typeset h1 {
  margin: 0 0 1.2rem;
  font-size: 2.1rem;
  line-height: 1.18;
}

.md-typeset h2 {
  margin-top: 2.25rem;
  padding-bottom: 0.42rem;
  border-bottom: 1px solid var(--kb-border);
  font-size: 1.45rem;
  line-height: 1.28;
}

.md-typeset h3 {
  margin-top: 1.7rem;
  font-size: 1.12rem;
}

.md-typeset p,
.md-typeset ul,
.md-typeset ol {
  margin-top: 0.75em;
  margin-bottom: 0.75em;
}

.md-typeset a {
  font-weight: 520;
  text-decoration-color: transparent;
  text-underline-offset: 0.15em;
  transition: color 130ms ease, text-decoration-color 130ms ease;
}

.md-typeset a:hover {
  color: var(--md-accent-fg-color);
  text-decoration-color: currentColor;
}

.md-typeset hr {
  border-bottom-color: var(--kb-border);
}

/* Banner: exact image bounds, no phantom white footer */
.md-typeset > p:has(> img[alt*="Banner" i]) {
  margin: 0 0 1.7rem;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--kb-border);
  border-radius: 0.7rem;
  background: #000;
  box-shadow: var(--kb-shadow);
  font-size: 0;
  line-height: 0;
}

.md-typeset img[alt*="Banner" i] {
  display: block;
  width: 100%;
  max-width: none;
  height: auto;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  vertical-align: top;
}

.md-typeset img:not([alt*="Banner" i]) {
  border-radius: var(--kb-radius-sm);
}

/* Tables */
.md-typeset .md-typeset__table {
  display: block;
  width: 100%;
  margin: 1rem 0 1.4rem;
  overflow-x: auto;
  overflow-y: visible;
  overscroll-behavior-x: contain;
  overscroll-behavior-y: auto;
  border: 1px solid var(--kb-border);
  border-radius: var(--kb-radius);
  background: var(--kb-surface);
  box-shadow: var(--kb-shadow);
}

.md-typeset table:not([class]) {
  display: table;
  width: 100%;
  min-width: 34rem;
  margin: 0;
  border: 0;
  border-collapse: separate;
  border-spacing: 0;
  background: transparent;
  font-size: 0.7rem;
  line-height: 1.45;
}

.md-typeset table:not([class]) th {
  padding: 0.68rem 0.78rem;
  border-bottom: 1px solid var(--kb-border-strong);
  color: var(--md-default-fg-color--light);
  background: var(--kb-muted-surface);
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.055em;
  text-align: left;
  text-transform: uppercase;
  white-space: nowrap;
}

.md-typeset table:not([class]) td {
  padding: 0.65rem 0.78rem;
  border-bottom: 1px solid var(--kb-border);
  vertical-align: top;
}

.md-typeset table:not([class]) tbody tr:last-child td {
  border-bottom: 0;
}

.md-typeset table:not([class]) tbody tr:hover td {
  background: color-mix(in srgb, var(--md-primary-fg-color) 5%, transparent);
}

.md-typeset table:not([class]) td:first-child {
  color: var(--md-default-fg-color);
  font-weight: 650;
  white-space: nowrap;
}

/* Code */
.md-typeset code {
  border-radius: 0.23rem;
}

.md-typeset :not(pre) > code {
  padding: 0.1em 0.35em;
  border: 1px solid var(--kb-border);
  background: var(--md-code-bg-color);
}

.md-typeset .highlight,
.md-typeset pre {
  border-radius: var(--kb-radius);
}

.md-typeset .highlight {
  overflow: hidden;
  border: 1px solid var(--kb-border);
  box-shadow: 0 5px 20px rgb(0 0 0 / 8%);
}

.md-typeset pre > code {
  border-radius: 0;
  font-variant-ligatures: none;
}

/* Notes and expandable sections */
.md-typeset .admonition,
.md-typeset details {
  border-width: 0 0 0 0.18rem;
  border-radius: var(--kb-radius-sm);
  background: var(--kb-surface);
  box-shadow: 0 4px 18px rgb(0 0 0 / 6%);
}

[data-md-color-scheme="slate"] .md-typeset .admonition,
[data-md-color-scheme="slate"] .md-typeset details {
  box-shadow: 0 6px 22px rgb(0 0 0 / 18%);
}

.md-typeset blockquote {
  border-left-color: var(--kb-cyan);
  color: var(--md-default-fg-color--light);
}

/* Side navigation */
.md-sidebar__scrollwrap {
  /* Material paints scroll-linked fade masks here; they read as a foggy
     overlay just above the footer when you try to reach lower content. */
  -webkit-mask-image: none !important;
  mask-image: none !important;
  scrollbar-width: thin;
  scrollbar-color: var(--kb-border-strong) transparent;
}

/* Keep sidebars / TOC from stacking over the footer prev-next bar */
.md-sidebar {
  z-index: 1;
}

.md-sidebar--secondary {
  z-index: 1;
}

.md-nav {
  font-size: 0.66rem;
}

.md-nav__title {
  color: var(--md-default-fg-color);
  font-weight: 700;
}

.md-nav__link {
  color: var(--md-default-fg-color--light);
  transition: color 130ms ease;
}

[data-md-color-scheme="slate"] .md-nav__title {
  color: #f1f5f9;
}

[data-md-color-scheme="slate"] .md-nav__link {
  color: #b8c5d1;
}

[data-md-color-scheme="slate"] .md-nav__link:hover,
[data-md-color-scheme="slate"] .md-nav__link--active {
  color: var(--kb-accent-bright);
}

.md-nav__link:hover,
.md-nav__link--active {
  color: var(--md-typeset-a-color);
}

.md-nav__item--active > .md-nav__link {
  font-weight: 650;
}

.md-sidebar--secondary .md-nav {
  padding-left: 0.55rem;
  border-left: 1px solid var(--kb-border);
}

/* Footer — stay in document flow, never a sticky/fixed overlay */
.md-footer {
  position: relative;
  z-index: 3;
  margin-top: 1.25rem;
  border-top: 1px solid var(--kb-border);
}

.md-footer__inner,
.md-footer-meta {
  position: relative;
  z-index: 3;
}

/* Compact prev/next bar — keep height low without collapsing title width */
.md-footer__inner {
  padding: 0.15rem 0.2rem;
}

.md-footer__link {
  align-items: center;
  flex: 1 1 0;
  max-width: 50%;
  min-width: 8rem;
  margin-top: 0.35rem;
  margin-bottom: 0.35rem;
  overflow: hidden;
}

.md-footer__link--next {
  justify-content: flex-end;
}

.md-footer__title {
  flex: 1 1 auto;
  min-width: 0;
  max-width: none;
  margin-bottom: 0;
  padding: 0 0.55rem;
  font-size: 0.78rem;
  line-height: 1.25;
}

.md-footer__direction {
  font-size: 0.58rem;
  line-height: 1.2;
}

.md-footer__button {
  flex: 0 0 auto;
  margin: 0;
  padding: 0.15rem;
}

/* Back-to-top shouldn't sit in a fog layer over page content */
.md-top {
  z-index: 2;
}

/* Selection and focus */
::selection {
  color: #071013;
  background: var(--kb-accent-bright);
}

:focus-visible {
  outline: 2px solid var(--md-accent-fg-color);
  outline-offset: 2px;
}

/* Mobile */
@media screen and (max-width: 76.234375em) {
  .md-main__inner {
    margin-top: 1rem;
  }
}

@media screen and (max-width: 44.984375em) {
  .md-content__inner {
    padding-top: 0.25rem;
  }

  .md-typeset {
    font-size: 0.73rem;
  }

  .md-typeset h1 {
    font-size: 1.65rem;
  }

  .md-typeset h2 {
    font-size: 1.2rem;
  }

  .md-typeset > p:has(> img[alt*="Banner" i]) {
    margin-right: -0.8rem;
    margin-left: -0.8rem;
    border-right: 0;
    border-left: 0;
    border-radius: 0;
  }

  .md-typeset .md-typeset__table {
    width: calc(100% + 1.6rem);
    margin-right: -0.8rem;
    margin-left: -0.8rem;
    border-right: 0;
    border-left: 0;
    border-radius: 0;
  }

  .md-typeset table:not([class]) {
    min-width: 30rem;
    font-size: 0.66rem;
  }
}

/* Respect reduced-motion preference — keep final keyframe state */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    animation-fill-mode: forwards !important;
  }
}