/* =========================================
   Colour palette and typography
   ========================================= */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600&display=swap');

:root {
  --site-background: #e8e9e5;
  --site-panel: #fafaf7;
  --site-text: #252b27;
  --site-accent: #526b46;
  --site-accent-hover: #354d2d;
  --site-border: #c8cdc5;
  --site-muted: #899188;

  --body-font: "Tamzen", monospace;
  --display-font: "Tamzen", monospace;
  --heading-font: "Space Grotesk", sans-serif;

  /* --container-width: 64ch; from theme CSS */
  --grid-columns: 26;
  --strip-padding-cells: 2;
  --content-width: min(
    var(--container-width),
    calc(100vw - 2 * var(--spacing-lg))
  );
  --grid-size: round(
    nearest,
    calc(
      var(--content-width) /
      (var(--grid-columns) - 2 * var(--strip-padding-cells))
    ),
    1px
  );
  --strip-padding: calc(
    var(--grid-size) * var(--strip-padding-cells)
  );
  --strip-width: calc(
    var(--grid-size) * var(--grid-columns)
  );
}

/* Tamzen bitmap font */

@font-face {
  font-family: "Tamzen";
  src: url("/fonts/Tamzen8x16r.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Tamzen";
  src: url("/fonts/Tamzen8x16b.ttf") format("truetype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* IBM Plex Sans */

@font-face {
  font-family: "IBM Plex Sans";
  src: url("/fonts/IBMPlexSans-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Sans";
  src: url("/fonts/IBMPlexSans-Italic.ttf") format("truetype");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Sans";
  src: url("/fonts/IBMPlexSans-Bold.ttf") format("truetype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* =========================================
   Base styles
   ========================================= */

html {
  color: var(--site-text);
  background-color: var(--site-background) !important;
  background-image:
    linear-gradient(to right, #d4dbd0 1px, transparent 1px),
    linear-gradient(to bottom, #d4dbd0 1px, transparent 1px);
  background-size: var(--grid-size) var(--grid-size);
  background-position:
    calc(50% + var(--grid-size) / 2) 0,
    0 0;
  margin: 0;
}

body {
  background: transparent !important;
  position: relative;
  isolation: isolate;
  color: var(--site-text) !important;
  font-family: var(--body-font);
  padding-top: 15px;
  padding-bottom: 15px;
  gap: 0 !important;
  margin: 0;
}

/* Solid background behind header, main and footer */
body::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0;
  bottom: 0;
  left: calc(50% + 0.5px);
  transform: translateX(-50%);
  width: calc(var(--strip-width) - 1px);
  background: var(--site-background);
  pointer-events: none;
}

main,
header,
footer,
nav,
p,
li,
h1, h2, h3, h4, h5, h6 {
  color: var(--site-text);
}

/* Long-form content */

main p,
main li,
main blockquote {
  font-family: var(--body-font) !important;
  font-size: 14px;
  line-height: 1.4;
}

/* Headings */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--display-font) !important;
  font-size: 16px !important;
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0;
  text-transform: uppercase;
}

/* Contrasting font for headings and navigation */

h1, h2, h3, h4, h5, h6,
.site-name {
  font-family: var(--heading-font) !important;
  font-weight: 600 !important;
}

/* Interface typography */

header,
nav,
footer,
button,
label,
time {
  font-family: var(--display-font) !important;
  font-size: 16px;
}

/* =========================================
   Links and separators
   ========================================= */

a,
a:visited {
  color: var(--site-accent) !important;
  text-decoration: none !important;
  border-bottom: none !important;
}

a:hover,
a:focus-visible {
  color: var(--site-accent-hover) !important;
  text-decoration: underline !important;
  text-decoration-style: solid !important;
}

/* Visible keyboard focus */

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--site-accent);
  outline-offset: 3px;
}

/* Content links remain identifiable without relying on colour */

main p a,
main li a,
main blockquote a {
  text-decoration: underline !important;
  text-underline-offset: 2px;
}

main p a:hover,
main li a:hover,
main blockquote a:hover {
  text-decoration-thickness: 2px !important;
}

hr {
  border: 0;
  border-top: 1px solid var(--site-border);
}

/* =========================================
   Layout
   ========================================= */

main {
  box-sizing: border-box;
  background: var(--site-panel) !important;
  border: 1px solid var(--site-border);
  border-radius: 2px;
  box-shadow: 3px 3px 0 rgba(37, 43, 39, 0.09);
  padding: 28px 32px;
}

body > main {
  margin-top: 15px;
  margin-bottom: 12px;
}

body > header {
  box-sizing: border-box;
  padding: 12px 32px 8px !important;
  margin: 0 !important;
}

body > footer {
  padding: 12px 0 !important;
  color: var(--site-panel);
  font-size: 14px !important;
}

footer p {
   margin: 0;
}

body > footer a,
body > footer a:visited {
  color: var(--site-muted) !important;
}

/* =========================================
   Site header and navigation
   ========================================= */

.site-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.site-name,
.site-name:visited,
.site-name:hover {
  font-family: var(--display-font);
  font-size: 16px;
  font-weight: 400;
  color: var(--site-text) !important;
  text-transform: uppercase;
  text-decoration: none !important;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.site-nav a,
.site-nav a:visited {
  font-family: var(--display-font) !important;
  font-size: 16px !important;
  font-weight: 400;
  text-transform: uppercase;
  text-decoration: none !important;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  text-decoration: underline !important;
}

/* =========================================
   Content spacing and heading hierarchy
   ========================================= */

/* Main page heading */
main h1 {
  margin-top: 0;
  margin-bottom: 1.5rem;
}

/* Section headings: more space above than below */
main h2 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

/* Subsection headings */
main h3,
main h4,
main h5,
main h6 {
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

/* Paragraphs and lists */
main p {
  margin-top: 0;
  margin-bottom: 1rem;
}

main ul,
main ol {
  margin-top: 0.5rem;
  margin-bottom: 1.25rem;
}

/* Avoid extra space at the bottom of the panel */
main > :last-child {
  margin-bottom: 0;
}

/* Horizontal rules as section dividers */
main hr {
  margin: 1.75rem 0;
}

/* =========================================
   Generative ASCII artwork
   ========================================= */

.ascii-art {
  margin-bottom: 1.5rem;
}

.ascii-art pre {
  font-family: var(--display-font);
  font-size: 14px;
  line-height: 1.15;
  color: var(--site-accent);
  background: transparent;
  border: none;
  padding: 0;
  margin: 0 0 0.75rem;
  overflow: hidden;
  white-space: pre;
}

.ascii-art button {
  font-family: var(--display-font);
  font-size: 14px;
  color: var(--site-accent);
  background: transparent;
  border: 1px solid var(--site-border);
  padding: 4px 9px;
  cursor: pointer;
}

.ascii-art button:hover {
  color: var(--site-accent-hover);
  background: var(--site-background);
}

.selected-projects ul {
  list-style: none !important;
  list-style-type: none !important;
  padding-left: 0 !important;
  margin-left: 0 !important;
}

.selected-projects li {
  list-style: none !important;
  display: block;
  margin-bottom: 1rem;
}

.selected-projects li::marker {
  content: "";
}

.selected-projects li p {
  margin-top: 0.25rem;
  color: var(--site-muted);
}

/* Disable Shibui's automatic heading numbering */
main h2::before {
  content: none !important;
}

/* =========================================
   Responsive adjustments
   ========================================= */

@media (max-width: 600px) {
  main {
    padding: 20px 18px;
  }

  body > header {
    padding: 12px 18px 8px !important;
  }

  body > main {
    margin-top: 8px;
  }
}

/* =========================================
   Projects listing
   ========================================= */

.project-entry {
  margin-bottom: 1rem;
}

.project-entry time,
p > time {
  color: var(--site-muted);
  font-size: 14px;
}

p:has(time) {
  margin-bottom: 0;
}

.project-entry h2 {
  margin: 0;
  font-size: 14px !important;
}

.project-entry p {
  margin: 0 0 8px;
}

.project-external a {
  font-size: 14px;
}

.project-external {
  white-space: nowrap;
}