/* ===========================================================================
   Oduflow docs — Material theme customisation
   Dark-first, blue brand accent (matches oduflow.dev), seamless header,
   landing hero + cards.
   =========================================================================== */

:root {
  --odu-brand:        #2e79f5;  /* brand primary (oduflow.dev) */
  --odu-brand-bright: #4f8dff;  /* accent / hover            */
  --odu-brand-link:   #74a8ff;  /* dark-mode links           */
  --odu-brand-glow:   rgba(46, 121, 245, .30);
}

/* --- Custom primary / accent (applies to both colour schemes) ------------- */
[data-md-color-primary="custom"] {
  --md-primary-fg-color:         #2e79f5;
  --md-primary-fg-color--light:  #4f8dff;
  --md-primary-fg-color--dark:   #1f5fd0;
  --md-primary-bg-color:         #ffffff;
  --md-primary-bg-color--light:  rgba(255, 255, 255, .7);
}
[data-md-color-accent="custom"] {
  --md-accent-fg-color:             #4f8dff;
  --md-accent-fg-color--transparent: rgba(46, 121, 245, .1);
  --md-accent-bg-color:             #ffffff;
  --md-accent-bg-color--light:      rgba(255, 255, 255, .7);
}

/* --- Dark scheme: blue-tinted near-black (matches oduflow.dev) ------------ */
[data-md-color-scheme="slate"] {
  --md-default-bg-color:          #060a12;
  --md-default-bg-color--light:   rgba(6, 10, 18, .7);
  --md-default-bg-color--lighter: rgba(6, 10, 18, .3);
  --md-default-bg-color--lightest:rgba(6, 10, 18, .12);

  --md-default-fg-color:          rgba(230, 232, 235, .92);
  --md-default-fg-color--light:   rgba(230, 232, 235, .70);
  --md-default-fg-color--lighter: rgba(230, 232, 235, .42);
  --md-default-fg-color--lightest:rgba(230, 232, 235, .10);

  --md-code-bg-color:  #0c1322;
  --md-code-fg-color:  #d6dee8;

  --md-typeset-a-color: var(--odu-brand-link);

  --md-footer-bg-color:      #04070d;
  --md-footer-bg-color--dark:#03050a;

  --odu-surface:        #0b1220;
  --odu-surface-2:      #111a2b;
  --odu-border:         rgba(140, 170, 225, .12);
  --odu-border-strong:  rgba(140, 170, 225, .20);
}

/* --- Light scheme: cool white + soft blue borders ------------------------ */
[data-md-color-scheme="default"] {
  --md-default-bg-color: #ffffff;
  --md-typeset-a-color:  #1b5fd0;

  --odu-surface:        #f4f8ff;
  --odu-surface-2:      #e9f1ff;
  --odu-border:         rgba(20, 60, 140, .10);
  --odu-border-strong:  rgba(20, 60, 140, .16);
}

/* ===========================================================================
   Seamless header — page-coloured bar instead of a solid blue band
   =========================================================================== */
.md-header {
  background-color: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
  border-bottom: 1px solid var(--odu-border);
  box-shadow: none;
  transition: background-color .25s, border-color .25s;
}
.md-header[data-md-state="shadow"],
.md-header--shadow {
  box-shadow: 0 0 .4rem rgba(0, 0, 0, .08), 0 .2rem .4rem rgba(0, 0, 0, .12);
}
.md-tabs { background-color: var(--md-default-bg-color); }

/* White logo PNG → flip to dark in light mode */
[data-md-color-scheme="default"] .md-header__button.md-logo img,
[data-md-color-scheme="default"] .md-nav__title .md-logo img {
  filter: invert(1);
}
.md-header__button.md-logo img,
.md-nav__title .md-logo img { height: 1.4rem; width: auto; }

/* Search field on the seamless header */
.md-search__form {
  background-color: var(--odu-surface);
  border: 1px solid var(--odu-border);
  border-radius: .6rem;
  box-shadow: none;
}
.md-search__form:hover { background-color: var(--odu-surface-2); }
[data-md-toggle="search"]:checked ~ .md-header .md-search__form {
  border-color: var(--odu-brand);
}

/* ===========================================================================
   Typography & global polish
   =========================================================================== */
.md-typeset { font-feature-settings: "kern", "liga", "calt"; }

.md-typeset h1,
.md-typeset h2,
.md-typeset h3 { letter-spacing: -.01em; font-weight: 700; }
.md-typeset h2 {
  margin-top: 2.4em;
  padding-bottom: .3em;
  border-bottom: 1px solid var(--odu-border);
}

.md-typeset a { transition: color .15s, opacity .15s; }
.md-typeset a:hover { color: var(--odu-brand-bright); }

/* Inline code + fenced blocks */
.md-typeset code { border-radius: .35rem; }
.md-typeset pre > code {
  border: 1px solid var(--odu-border);
  border-radius: .7rem;
}
.md-typeset .highlight { border-radius: .7rem; }

/* Tables */
.md-typeset table:not([class]) {
  border: 1px solid var(--odu-border);
  border-radius: .7rem;
  overflow: hidden;
  box-shadow: none;
}
.md-typeset table:not([class]) th {
  background-color: var(--odu-surface-2);
  font-weight: 600;
}
.md-typeset table:not([class]) tr:hover { background-color: var(--odu-surface); }

/* Slim, themed scrollbar (WebKit) */
* { scrollbar-width: thin; scrollbar-color: var(--odu-border-strong) transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-thumb {
  background: var(--odu-border-strong);
  border-radius: 8px;
  border: 2px solid transparent;
  background-clip: content-box;
}
*::-webkit-scrollbar-thumb:hover { background: var(--md-default-fg-color--lighter); background-clip: content-box; }

/* Sidebar section labels (navigation.sections) */
.md-nav__item--section > .md-nav__link {
  font-size: .66rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--md-default-fg-color--light);
}

/* Active nav link accent */
.md-nav__link--active,
.md-nav__link--active:focus { color: var(--odu-brand); font-weight: 600; }

/* Headerlinks (kept from previous theme) */
.headerlink { opacity: 0; transition: opacity .2s; text-decoration: none; color: inherit; }
h1:hover .headerlink, h2:hover .headerlink, h3:hover .headerlink,
h4:hover .headerlink, h5:hover .headerlink, h6:hover .headerlink { opacity: 1; }

/* ===========================================================================
   Landing hero
   =========================================================================== */
.odu-hero {
  position: relative;
  margin: -1rem -.8rem 3rem;
  padding: 4.5rem 1.5rem 3.5rem;
  text-align: center;
  border-radius: 1.2rem;
  overflow: hidden;
  isolation: isolate;
}
/* Layered blue glow + grid texture */
.odu-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(120% 120% at 50% -10%, var(--odu-brand-glow) 0%, transparent 55%),
    radial-gradient(80% 80% at 85% 20%, rgba(46, 121, 245, .18) 0%, transparent 60%);
}
.odu-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--odu-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--odu-border) 1px, transparent 1px);
  background-size: 38px 38px;
  -webkit-mask-image: radial-gradient(100% 80% at 50% 0%, #000 30%, transparent 75%);
          mask-image: radial-gradient(100% 80% at 50% 0%, #000 30%, transparent 75%);
  opacity: .6;
}

.odu-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .5em;
  margin: 0 0 1.1rem;
  padding: .32rem .8rem;
  font-family: var(--md-code-font-family, "JetBrains Mono", monospace);
  font-size: .66rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--odu-brand);
  background: var(--md-accent-fg-color--transparent);
  border: 1px solid var(--odu-brand-glow);
  border-radius: 2rem;
}

.md-typeset .odu-hero__title {
  margin: 0;
  font-size: clamp(2.4rem, 7vw, 4.6rem);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -.035em;
  background: linear-gradient(180deg, var(--md-default-fg-color) 25%, var(--odu-brand) 130%);
  -webkit-background-clip: text;
          background-clip: text;
  color: transparent;
}

.odu-hero__subtitle {
  max-width: 40rem;
  margin: 1.2rem auto 0;
  font-size: 1.06rem;
  line-height: 1.6;
  color: var(--md-default-fg-color--light);
}
.odu-hero__subtitle strong { color: var(--md-default-fg-color); font-weight: 600; }

.odu-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  justify-content: center;
  margin-top: 2rem;
}
.md-typeset .odu-btn {
  display: inline-flex;
  align-items: center;
  gap: .5em;
  padding: .62rem 1.3rem;
  font-size: .82rem;
  font-weight: 600;
  border-radius: .65rem;
  border: 1px solid transparent;
  transition: transform .15s ease, box-shadow .2s ease, background-color .2s, border-color .2s;
}
.md-typeset .odu-btn:hover { transform: translateY(-2px); }
.md-typeset .odu-btn--primary {
  color: #ffffff;
  background: var(--odu-brand);
  box-shadow: 0 .4rem 1.2rem var(--odu-brand-glow);
}
.md-typeset .odu-btn--primary:hover {
  color: #ffffff;
  background: var(--odu-brand-bright);
  box-shadow: 0 .7rem 1.6rem var(--odu-brand-glow);
}
.md-typeset .odu-btn--ghost {
  color: var(--md-default-fg-color);
  background: var(--odu-surface);
  border-color: var(--odu-border-strong);
}
.md-typeset .odu-btn--ghost:hover {
  color: var(--md-default-fg-color);
  border-color: var(--odu-brand-bright);
  background: var(--odu-surface-2);
}
.md-typeset .odu-btn--changelog {
  color: #ffffff;
  background: linear-gradient(135deg, #2e79f5 0%, #4a00e0 100%);
  border-color: transparent;
  border-right: 1px solid #4a00e0 !important;
  box-shadow: 0 .4rem 1.2rem rgba(64, 25, 95, .30);
}
.md-typeset .odu-btn--changelog:hover {
  color: #ffffff;
  background: linear-gradient(135deg, #4f8dff 0%, #5a1dff 100%);
  border-right: 1px solid #5a1dff !important;
  box-shadow: 0 .7rem 1.6rem rgba(64, 25, 95, .35);
}

/* ===========================================================================
   Feature card grid (Material `grid cards`)
   =========================================================================== */
.md-typeset .grid.cards > ul > li,
.md-typeset .grid > .card {
  border: 1px solid var(--odu-border);
  border-radius: .9rem;
  padding: 1.1rem 1.2rem;
  background: var(--odu-surface);
  transition: transform .18s ease, border-color .18s ease, box-shadow .25s ease, background-color .2s;
}
.md-typeset .grid.cards > ul > li:hover {
  transform: translateY(-4px);
  border-color: var(--odu-brand-bright);
  background: var(--odu-surface-2);
  box-shadow: 0 .6rem 1.6rem rgba(0, 0, 0, .18);
}
.md-typeset .grid.cards > ul > li > hr {
  margin: .8rem 0;
  border-color: var(--odu-border);
}
.md-typeset .grid.cards .twemoji.lg,
.md-typeset .grid.cards .twemoji svg {
  height: 1.6rem;
  width: 1.6rem;
}
.md-typeset .grid.cards > ul > li .twemoji {
  color: var(--odu-brand);
}

/* ===========================================================================
   Screenshot frame
   =========================================================================== */
.odu-shot {
  margin: 2.5rem 0;
  border-radius: 1rem;
  border: 1px solid var(--odu-border-strong);
  overflow: hidden;
  box-shadow: 0 1.2rem 3rem rgba(0, 0, 0, .25);
}
.odu-shot img { display: block; width: 100%; }

/* ===========================================================================
   Footer + misc
   =========================================================================== */
.md-footer-meta { backdrop-filter: none; }

@media screen and (max-width: 44.9em) {
  .odu-hero { padding: 3rem 1rem 2.5rem; margin: -1rem -.6rem 2rem; }
}

/* Platform architecture: semantic cards with decorative connection paths. */
.odu-architecture {
  --map-control: #639aff;
  --map-network: #31c7b4;
  --map-ai: #b598ff;
  padding: clamp(1rem, 3vw, 2rem);
  margin: 1rem 0 3rem;
  border: 1px solid var(--odu-border-strong);
  border-radius: 1.2rem;
  background: var(--odu-surface);
}
[data-md-color-scheme="default"] .odu-architecture {
  --map-control: #245fc7;
  --map-network: #087f72;
  --map-ai: #7347be;
}
.odu-architecture__eyebrow,
.odu-map__category {
  display: block;
  font-family: var(--md-code-font-family);
  font-size: .58rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.odu-architecture__eyebrow { color: var(--map-control); }
.md-typeset .odu-architecture__heading h2 {
  margin: .55rem 0 .6rem;
  padding: 0;
  border: 0;
  font-size: clamp(1.35rem, 2.6vw, 1.8rem);
  line-height: 1.25;
  letter-spacing: -.035em;
}
.odu-architecture__heading > p {
  max-width: 42rem;
  margin: 0 0 1.8rem;
  color: var(--md-default-fg-color--light);
  font-size: .78rem;
}
.odu-map {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-template-rows: 164px 66px 172px 66px auto;
  column-gap: 24px;
}
.odu-map__connections {
  position: absolute;
  inset: 0 0 auto;
  width: 100%;
  height: 468px;
  overflow: visible;
  pointer-events: none;
}
.odu-map__connections path {
  fill: none;
  stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
}
.odu-map__line--control, .odu-map__arrow--control { stroke: var(--map-control); }
.odu-map__line--network, .odu-map__arrow--network { stroke: var(--map-network); }
.odu-map__line--network { stroke-dasharray: 5 5; }
.odu-map__line--ai, .odu-map__arrow--ai { stroke: var(--map-ai); }
.md-typeset .odu-map__node {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  padding: 16px 20px;
  color: var(--md-default-fg-color);
  background: var(--md-default-bg-color);
  border: 1px solid var(--odu-border-strong);
  border-top: 2px solid var(--node-accent, var(--map-control));
  border-radius: .7rem;
  transition: border-color .2s, box-shadow .2s;
}
.md-typeset .odu-map__node:hover,
.md-typeset .odu-map__node:focus-visible {
  border-color: var(--node-accent, var(--map-control));
  box-shadow: 0 0 0 3px var(--odu-border), 0 .4rem 1.2rem rgba(0, 0, 0, .12);
}
.odu-map__node--control { grid-area: 1 / 2; }
.odu-map__node--headscale { grid-area: 3 / 1; --node-accent: var(--map-network); }
.odu-map__node--salt { grid-area: 3 / 2; }
.odu-map__node--litellm { grid-area: 3 / 3; --node-accent: var(--map-ai); }
.odu-map__category { color: var(--node-accent, var(--map-control)); }
.md-typeset .odu-map h3 {
  margin: 7px 0 6px;
  font-size: 1.02rem;
  line-height: 1.25;
  letter-spacing: -.02em;
}
.odu-map__node h3 > span { color: var(--map-control); }
.md-typeset .odu-map__node p {
  margin: 0;
  font-size: .65rem;
  line-height: 1.5;
  color: var(--md-default-fg-color--light);
}
.odu-map__more {
  display: flex;
  justify-content: space-between;
  gap: .4rem;
  margin-top: auto;
  padding-top: 8px;
  font-size: .57rem;
  color: var(--node-accent, var(--map-control));
}
.odu-map__edge {
  z-index: 1;
  place-self: center;
  padding: 3px 7px;
  background: var(--odu-surface);
  font-size: .57rem;
  font-weight: 500;
  line-height: 1.35;
  text-align: center;
  color: var(--map-control);
}
.odu-map__edge--enrollment { grid-area: 2 / 1; }
.odu-map__edge--dispatch { grid-area: 2 / 2; }
.odu-map__edge--budgets { grid-area: 2 / 3; }
.odu-map__edge--network { grid-area: 4 / 1; color: var(--map-network); }
.odu-map__edge--configuration { grid-area: 4 / 2; }
.odu-map__edge--inference { grid-area: 4 / 3; color: var(--map-ai); }
.odu-map__clients {
  position: relative;
  grid-area: 5 / 1 / 6 / 4;
  padding: 20px;
  border: 1px solid var(--odu-border-strong);
  border-radius: .8rem;
  background: var(--md-default-bg-color);
}
.odu-map__clients-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 16px;
}
.md-typeset .odu-map__clients-heading h3 a { color: var(--md-default-fg-color); }
.odu-map__clients-heading h3 span { font-size: .7rem; color: var(--map-control); }
.odu-map__isolation {
  padding: 6px 10px;
  border: 1px solid var(--odu-border-strong);
  border-radius: 2rem;
  color: var(--md-default-fg-color--light);
  font-size: .58rem;
}
.odu-map__instances { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.odu-map__instance {
  padding: 14px;
  border: 1px dashed var(--odu-border-strong);
  border-radius: .6rem;
  background: var(--odu-surface);
}
.odu-map__instance-heading { display: flex; justify-content: space-between; gap: .5rem; margin-bottom: 10px; }
.odu-map__instance-heading strong { font-size: .68rem; }
.odu-map__instance-heading > span { font-size: .55rem; color: var(--md-default-fg-color--light); }
.odu-map__production {
  padding: 10px 12px;
  background: var(--md-accent-fg-color--transparent);
  border: 1px solid var(--odu-brand-glow);
  border-radius: .35rem;
  color: var(--map-control);
  font-size: .7rem;
  font-weight: 600;
}
.odu-map__production > span { display: block; margin-top: 2px; font-size: .55rem; font-weight: 400; color: var(--md-default-fg-color--light); }
.odu-map__runtime { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 8px; }
.odu-map__runtime > span { padding: 8px 10px; border: 1px solid var(--odu-border); border-radius: .35rem; font-size: .65rem; }
.odu-map__runtime small { display: block; margin-top: 2px; font-size: .52rem; color: var(--md-default-fg-color--light); }
.odu-map__foundation { display: flex; flex-wrap: wrap; gap: 6px 12px; padding-top: 10px; font-size: .55rem; color: var(--md-default-fg-color--light); }
.odu-map__foundation span::before { content: ""; display: inline-block; width: 4px; height: 4px; margin: 0 5px 2px 0; border-radius: 50%; background: var(--map-network); }
.md-typeset .odu-map__clients-caption { margin: 14px 0 0; font-size: .6rem; color: var(--md-default-fg-color--light); }
.odu-map__legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 22px; margin: 20px 0; font-size: .57rem; color: var(--md-default-fg-color--light); }
.odu-map__legend > span { display: inline-flex; align-items: center; gap: 7px; }
.odu-map__key { width: 17px; border-top: 2px solid var(--map-control); }
.odu-map__key--network { border-color: var(--map-network); border-top-style: dashed; }
.odu-map__key--ai { border-color: var(--map-ai); }
.odu-map__notes { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; border-top: 1px solid var(--odu-border); padding-top: 16px; }
.md-typeset .odu-map__notes p { margin: 0; font-size: .64rem; line-height: 1.65; color: var(--md-default-fg-color--light); }
.odu-map__notes strong { display: block; margin-bottom: 4px; color: var(--md-default-fg-color); font-weight: 600; }

@media screen and (max-width: 1000px) {
  .odu-map { display: flex; flex-direction: column; gap: 12px; }
  .odu-map__connections, .odu-map__edge { display: none; }
  .md-typeset .odu-map__node { min-height: 140px; padding: 18px; }
  .odu-map__node--control { order: 0; }
  .odu-map__node--salt { order: 2; }
  .odu-map__node--headscale { order: 1; }
  .odu-map__node--litellm { order: 3; }
  .odu-map__clients { order: 4; padding: 16px; }
  .odu-map__clients-heading { align-items: flex-start; flex-direction: column; gap: 6px; }
  .odu-map__instances, .odu-map__notes { grid-template-columns: 1fr; }
  .odu-map__instance-heading { flex-wrap: wrap; }
  .odu-map__node--control::after { content: "↓ Dispatch jobs to Salt · Manage network & AI access"; }
  .odu-map__node--salt::after { content: "↓ Configure & update client instances"; }
  .odu-map__node--headscale::after { content: "↓ Coordinate the private Tailscale network"; }
  .odu-map__node--litellm::after { content: "↑ AI requests from client instances"; }
  .odu-map__node::after { padding-top: 12px; margin-top: 12px; border-top: 1px solid var(--odu-border); font-size: .58rem; color: var(--node-accent, var(--map-control)); }
}