/* ============================================================
   kubik.au — Czech Cubist design layer for MkDocs Material
   ------------------------------------------------------------
   Palette is plaster + graphite + brass. Structure is faceted:
   chamfered corners, hard offset shadows, a triangular lattice.
   No blur, no border-radius, no gradients-as-decoration.
   ============================================================ */

/* --- 1. Fonts ------------------------------------------------
   theme.font is false in mkdocs.yml, so nothing calls out to
   Google. All six files are vendored in docs/assets/fonts/ and
   served from kubik.au — see the colophon's privacy claim, which
   this section is what makes true.

   Vendored 2026-07-28 from Fontsource (the packages are named
   differently to the note that used to live here — the variable
   faces are under the @fontsource-variable scope):
       npm i @fontsource-variable/familjen-grotesk \
             @fontsource-variable/source-serif-4 \
             @fontsource/ibm-plex-mono

   Each family is declared TWICE, latin and latin-ext, rather than
   once against a single combined file. That is not pedantry:
   latin-ext is U+0100-02BA, which is where č ř ž ě ů live. Without
   it Gočár silently falls back to another face mid-word, while
   Kubík — whose í sits in the latin range — looks fine. The split
   also means a reader who never hits a diacritic never downloads
   the second file.

   unicode-range values are copied verbatim from Fontsource's own
   generated CSS, not hand-derived.
   ------------------------------------------------------------ */

/* Familjen Grotesk — display: headings, nav, buttons */
@font-face {
  font-family: "Familjen Grotesk";
  src: url("../assets/fonts/familjen-grotesk-latin-wght-normal.woff2") format("woff2");
  font-weight: 400 700;
  font-display: swap;
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: "Familjen Grotesk";
  src: url("../assets/fonts/familjen-grotesk-latin-ext-wght-normal.woff2") format("woff2");
  font-weight: 400 700;
  font-display: swap;
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}

/* Source Serif 4 — body: long-form reading */
@font-face {
  font-family: "Source Serif 4";
  src: url("../assets/fonts/source-serif-4-latin-wght-normal.woff2") format("woff2");
  font-weight: 300 700;
  font-display: swap;
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: "Source Serif 4";
  src: url("../assets/fonts/source-serif-4-latin-ext-wght-normal.woff2") format("woff2");
  font-weight: 300 700;
  font-display: swap;
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}

/* IBM Plex Mono — utility: eyebrows, metadata, code. Static 400. */
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../assets/fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../assets/fonts/ibm-plex-mono-latin-ext-400-normal.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}

/* --- 2. Colour schemes --------------------------------------- */

[data-md-color-scheme="kubik"] {
  --k-bg:      #ddded8;   /* cool lime plaster                    */
  --k-surface: #eaebe5;   /* the lit face of a form               */
  --k-facet:   #b7bab1;   /* the shaded face                      */
  --k-ink:     #17191a;   /* graphite                             */
  --k-accent:  #8a6420;   /* brass, darkened to sit on plaster    */
  --k-rule:    #17191a;

  --md-default-bg-color:        var(--k-bg);
  --md-default-fg-color:        var(--k-ink);
  --md-default-fg-color--light: #4a4d4e;
  --md-default-fg-color--lighter: #7c807f;
  --md-default-fg-color--lightest: var(--k-facet);
  --md-primary-fg-color:        var(--k-ink);
  --md-primary-bg-color:        var(--k-bg);
  --md-accent-fg-color:         var(--k-accent);
  --md-typeset-color:           var(--k-ink);
  --md-typeset-a-color:         var(--k-accent);
  --md-code-bg-color:           #e4e5df;
  --md-code-fg-color:           #24272a;
  --md-footer-bg-color:         var(--k-ink);
  --md-footer-bg-color--dark:   #0e0f10;
  color-scheme: light;
}

[data-md-color-scheme="kubik-night"] {
  --k-bg:      #16181a;   /* graphite                             */
  --k-surface: #1e2124;
  --k-facet:   #383c40;
  --k-ink:     #ddded8;
  --k-accent:  #c79a45;   /* brass, lifted for contrast on dark   */
  --k-rule:    #6d726f;

  --md-default-bg-color:        var(--k-bg);
  --md-default-fg-color:        var(--k-ink);
  --md-default-fg-color--light: #b6b8b3;
  --md-default-fg-color--lighter: #8b8f8b;
  --md-default-fg-color--lightest: var(--k-facet);
  --md-primary-fg-color:        var(--k-bg);
  --md-primary-bg-color:        var(--k-ink);
  --md-accent-fg-color:         var(--k-accent);
  --md-typeset-color:           var(--k-ink);
  --md-typeset-a-color:         var(--k-accent);
  --md-code-bg-color:           #1c1f21;
  --md-code-fg-color:           #d3d5cf;
  --md-footer-bg-color:         #0e0f10;
  --md-footer-bg-color--dark:   #0a0b0c;
  color-scheme: dark;
}

:root {
  --md-text-font: "Source Serif 4";
  --md-code-font: "IBM Plex Mono";
  --k-display: "Familjen Grotesk", "Source Serif 4", system-ui, sans-serif;
  --k-chamfer: 18px;
}

/* --- 3. Type -------------------------------------------------- */

body {
  font-family: var(--md-text-font), Georgia, serif;
}

.md-typeset {
  font-size: 0.82rem;
  line-height: 1.72;
}

.md-typeset h1,
.md-typeset h2,
.md-typeset h3,
.md-typeset h4 {
  font-family: var(--k-display);
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--k-ink);
}

.md-typeset h1 {
  font-size: 2.1rem;
  line-height: 1.06;
  margin-bottom: 1.2rem;
}

/* Section heads carry a facet marker instead of a rule. The
   triangle is the corner of a cube seen edge-on. */
.md-typeset h2 {
  font-size: 1.35rem;
  margin-top: 2.6em;
  padding-top: 0.55em;
  border-top: 1px solid var(--k-facet);
}
.md-typeset h2::before {
  content: "";
  display: block;
  width: 0;
  height: 0;
  margin-bottom: 0.5em;
  border-left: 11px solid var(--k-accent);
  border-bottom: 11px solid transparent;
}

.md-nav,
.md-header,
.md-tabs,
.md-footer {
  font-family: var(--k-display);
}

.md-header__title {
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* --- 4. Chrome ------------------------------------------------ */

.md-header {
  background: var(--md-default-bg-color);
  color: var(--k-ink);
  border-bottom: 1px solid var(--k-rule);
  box-shadow: none;
}

.md-tabs {
  background: transparent;
  color: var(--k-ink);
  border-bottom: 1px solid var(--k-facet);
}

.md-tabs__link {
  opacity: 0.72;
}
.md-tabs__link--active,
.md-tabs__link:hover {
  opacity: 1;
}

.md-search__form {
  border-radius: 0;
  background: var(--k-surface);
  border: 1px solid var(--k-facet);
}
.md-search__input::placeholder {
  color: var(--md-default-fg-color--lighter);
}

/* Active nav item gets a facet, not a highlight bar. */
.md-nav__link--active {
  font-weight: 600;
}
.md-nav__item .md-nav__link--active::before {
  content: "◣";
  color: var(--k-accent);
  margin-right: 0.4em;
  font-size: 0.7em;
  vertical-align: 0.15em;
}

/* --- 5. The signature: chamfered, facet-shadowed blocks ------- */

/* Grid cards are the primary structural unit on the home page.
   drop-shadow (not box-shadow) is used so the offset plate
   follows the chamfered clip-path instead of being cut off. */
.md-typeset .grid.cards > ul > li,
.k-plate {
  border: 1px solid var(--k-rule);
  border-radius: 0;
  background: var(--k-surface);
  padding: 1.1rem 1.2rem 1.3rem;
  clip-path: polygon(
    var(--k-chamfer) 0, 100% 0, 100% 100%,
    0 100%, 0 var(--k-chamfer)
  );
  filter: drop-shadow(6px 6px 0 var(--k-facet));
  transition: transform 180ms ease, filter 180ms ease, clip-path 180ms ease;
}

.md-typeset .grid.cards > ul > li:hover,
.k-plate:hover {
  transform: translate(-3px, -3px);
  filter: drop-shadow(9px 9px 0 var(--k-accent));
  --k-chamfer: 30px;
  border-color: var(--k-accent);
}

.md-typeset .grid.cards > ul > li > hr {
  border-color: var(--k-facet);
  margin: 0.7em 0;
}

/* Everything else Material rounds, we square off. */
.md-typeset code,
.md-typeset pre > code,
.md-typeset .admonition,
.md-typeset details,
.md-typeset .tabbed-set > .tabbed-content,
.md-typeset table:not([class]) {
  border-radius: 0;
}

.md-typeset .admonition,
.md-typeset details {
  border: 1px solid var(--k-rule);
  border-left-width: 4px;
  box-shadow: none;
  background: var(--k-surface);
}

.md-typeset pre > code {
  border: 1px solid var(--k-facet);
}

.md-typeset table:not([class]) {
  border: 1px solid var(--k-rule);
}
.md-typeset table:not([class]) th {
  background: var(--k-facet);
  color: var(--k-ink);
  font-family: var(--k-display);
  font-weight: 600;
}

.md-typeset blockquote {
  border-left: 3px solid var(--k-accent);
  color: var(--md-default-fg-color--light);
}

.md-typeset .md-button {
  border-radius: 0;
  border: 1px solid var(--k-rule);
  font-family: var(--k-display);
  font-weight: 600;
  letter-spacing: 0.02em;
  clip-path: polygon(12px 0, 100% 0, 100% 100%, 0 100%, 0 12px);
  transition: background-color 160ms ease, color 160ms ease;
}
.md-typeset .md-button--primary {
  background: var(--k-ink);
  color: var(--k-bg);
  border-color: var(--k-ink);
}
.md-typeset .md-button:hover {
  background: var(--k-accent);
  color: var(--k-bg);
  border-color: var(--k-accent);
}

/* --- 6. Home hero --------------------------------------------- */

.k-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--k-rule);
  padding: 5.5rem 0 4.5rem;
}

/* The lattice: three sets of hairlines at 60° to each other,
   i.e. the drafting grid an isometric cube is built on.
   Masked so it dissolves before it reaches the text. */
.k-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient( 60deg, var(--k-facet) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(-60deg, var(--k-facet) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(  0deg, var(--k-facet) 0 1px, transparent 1px 55.4px);
  -webkit-mask-image: linear-gradient(200deg, #000 0%, transparent 62%);
          mask-image: linear-gradient(200deg, #000 0%, transparent 62%);
  opacity: 0.85;
}

.k-hero__inner {
  position: relative;
  max-width: 61rem;
  margin: 0 auto;
  padding: 0 1.2rem;
}

.k-hero__eyebrow {
  font-family: var(--md-code-font), monospace;
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--md-default-fg-color--light);
  margin: 0 0 1.4rem;
}

.k-hero__title {
  font-family: var(--k-display);
  font-weight: 700;
  font-size: clamp(2.1rem, 6.2vw, 3.6rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
  max-width: 15ch;
  margin: 0 0 1.1rem;
  color: var(--k-ink);
}

.k-hero__lede {
  font-size: 0.95rem;
  line-height: 1.65;
  max-width: 46ch;
  color: var(--md-default-fg-color--light);
  margin: 0 0 2.2rem;
}

.k-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* Home page drops Material's content max-width so the hero
   can run edge to edge. */
.k-home .md-main__inner { margin-top: 0; }
.k-home .md-content__inner { padding-top: 0; }
.k-home .md-content__inner::before { display: none; }

/* --- 7. Blog listing ------------------------------------------ */

.md-post--excerpt {
  background: transparent;
  border-bottom: 1px solid var(--k-facet);
  padding-bottom: 1.4rem;
}
.md-post__meta {
  font-family: var(--md-code-font), monospace;
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* --- 8. Footer ------------------------------------------------ */

.md-footer-meta {
  font-family: var(--k-display);
  font-size: 0.7rem;
}

/* --- 9. Quality floor ----------------------------------------- */

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

@media (prefers-reduced-motion: reduce) {
  .md-typeset .grid.cards > ul > li,
  .k-plate,
  .md-typeset .md-button {
    transition: none;
  }
  .md-typeset .grid.cards > ul > li:hover,
  .k-plate:hover {
    transform: none;
  }
}

@media screen and (max-width: 44.9375em) {
  .k-hero { padding: 3.2rem 0 2.8rem; }
  .k-hero__title { max-width: 100%; }
  .md-typeset .grid.cards > ul > li { filter: drop-shadow(4px 4px 0 var(--k-facet)); }
}