/* =========================================================================
   Design tokens
   ========================================================================= */

@font-face {
  font-family: Newsreader;
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url(./assets/fonts/newsreader-latin-400-italic.woff2) format("woff2"),
       url(./assets/fonts/newsreader-all-400-italic.woff) format("woff");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215,
    U+FEFF, U+FFFD;
}
@font-face {
  font-family: Newsreader;
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url(./assets/fonts/newsreader-latin-ext-400-italic.woff2) format("woff2"),
       url(./assets/fonts/newsreader-all-400-italic.woff) format("woff");
  unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB,
    U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: Newsreader;
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url(./assets/fonts/newsreader-vietnamese-400-italic.woff2) format("woff2"),
       url(./assets/fonts/newsreader-all-400-italic.woff) format("woff");
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1,
    U+01AF-01B0, U+1EA0-1EF9, U+20AB;
}

:root {
  /* Type families */
  --font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif,
    "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  --font-serif: Newsreader, ui-serif, Georgia, Cambria, "Times New Roman", Times,
    serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;

  /* Neutral scale */
  --c-black: #000;
  --c-ink: #404040; /* body copy */
  --c-secondary: #737373; /* dates, labels, stats */
  --c-muted: #a3a3a3; /* de-emphasised words, markers, arrows */
  --c-rule: #d4d4d4; /* dotted leader rules */
  --c-line: #e5e5e5; /* borders, selection, pill hover */
  --c-hairline: #e5e7eb; /* image hairline border */
  --c-surface: #f5f5f5; /* pills, hover fills */

  /* Containers */
  --container-md: 768px;
  --container-lg: 1152px;
  --gutter: 1rem;
}

@media (min-width: 640px) {
  :root {
    --gutter: 1.5rem;
  }
}

/* =========================================================================
   Reset
   ========================================================================= */

*,
*::before,
*::after {
  box-sizing: border-box;
  border: 0 solid var(--c-hairline);
}

html {
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  tab-size: 4;
  font-family: var(--font-sans);
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

/* Cross-document page transitions: a fast crossfade between pages. Pure CSS,
   progressively enhanced — browsers without view transitions (e.g. Firefox)
   fall back to an instant navigation. */
@view-transition {
  navigation: auto;
}

::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 120ms;
}

@media (prefers-reduced-motion: reduce) {
  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation: none;
  }
}

body {
  margin: 0;
  line-height: inherit;
  color: var(--c-ink);
  padding: 3rem 0;
}

@media (min-width: 640px) {
  body {
    padding: 6rem 0;
  }
}

@media (min-width: 768px) {
  body {
    padding: 8rem 0;
  }
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-size: inherit;
  font-weight: inherit;
}

blockquote,
dl,
dd,
h1,
h2,
h3,
h4,
h5,
h6,
hr,
figure,
p,
pre {
  margin: 0;
}

ol,
ul,
menu {
  list-style: none;
  margin: 0;
  padding: 0;
}

a {
  color: inherit;
  text-decoration: inherit;
}

b,
strong {
  font-weight: bolder;
}

small {
  font-size: 80%;
}

sub,
sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}
sub {
  bottom: -0.25em;
}
sup {
  top: -0.5em;
}

code,
kbd,
samp,
pre {
  font-family: var(--font-mono);
  font-size: 1em;
}

hr {
  height: 0;
  color: inherit;
  border-top-width: 1px;
  border-color: var(--c-line);
}

img,
svg,
video,
canvas,
audio,
iframe,
embed,
object {
  display: block;
  vertical-align: middle;
}

img,
video {
  max-width: 100%;
  height: auto;
}

::selection {
  background-color: var(--c-line);
}

/* =========================================================================
   Containers
   ========================================================================= */

.layout-md {
  margin-left: auto;
  margin-right: auto;
  max-width: var(--container-md);
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* The wide measure, used by project entries so the screenshot column fits. */
.layout-lg {
  margin-left: auto;
  margin-right: auto;
  max-width: var(--container-lg);
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* A page section inside the narrow column. */
.section {
  padding-top: 3rem;
  padding-bottom: 3rem;
}

/* =========================================================================
   Links
   ========================================================================= */

/* One colour transition, shared by every element with a hover state. */
.link,
.site-nav a,
.project-pair,
.post {
  transition-property: color, background-color, border-color, text-decoration-color,
    fill, stroke;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 0.15s;
}

.link {
  text-decoration-line: underline;
  text-decoration-color: var(--c-muted);
  text-underline-offset: 3px;
}

.link:hover {
  color: var(--c-black);
  text-decoration-color: var(--c-black);
}

/* Inline "open in new tab" glyph that trails a label. */
.arrow {
  display: inline;
  color: var(--c-muted);
}

/* =========================================================================
   Header + nav
   ========================================================================= */

.site-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.site-title {
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
  line-height: 2rem;
  font-weight: 700;
  color: var(--c-black);
}

.page-title {
  font-weight: 300;
}

.page-title .dash {
  color: var(--c-muted);
}

.site-nav {
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  padding-top: 0.125rem;
  padding-bottom: 0.125rem;
  font-size: 1.125rem;
  line-height: 1.75rem;
  color: var(--c-secondary);
}

.site-nav > * + * {
  margin-left: 1.5rem;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--c-black);
}

@media (max-width: 580px) {
  .page-title {
    display: block;
    font-size: 1.25rem;
    line-height: 1.75rem;
  }
  .page-title .dash {
    display: none;
  }
}

@media (max-width: 420px) {
  .site-nav {
    flex-direction: column;
    align-items: flex-end;
  }
  .site-nav > * + * {
    margin-left: 0;
  }
}

/* =========================================================================
   Headings + prose
   ========================================================================= */

.heading2 {
  margin-bottom: 1.5rem;
  font-size: 1.25rem;
  line-height: 1.75rem;
  font-weight: 600;
  color: var(--c-black);
}

.prose {
  font-size: 1.125rem;
  line-height: 1.75rem;
}

.prose + .prose {
  margin-top: 1rem;
}

/* Serif italic, used for bylines and blurbs. Plain <em> stays sans italic. */
.serif {
  font-family: var(--font-serif);
  font-style: italic;
}

/* Serif italic accent set slightly larger than the sans text it sits in. */
.accent {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 110%;
  line-height: 100%;
}

/* =========================================================================
   Home — body stack
   ========================================================================= */

.stack > * + * {
  margin-top: 3.5rem;
}

.copy > * + * {
  margin-top: 1.25rem;
}

/* =========================================================================
   Two-column rows (home lists)
   ========================================================================= */

.project-pair {
  margin-left: -0.75rem;
  margin-right: -0.75rem;
  display: grid;
  row-gap: 0.25rem;
  padding: 0.5rem 0.75rem;
}

.project-pair:hover {
  background-color: var(--c-surface);
}

@media (min-width: 640px) {
  .project-pair {
    grid-template-columns: 1fr 2fr;
  }
}

.project-pair-name {
  color: var(--c-black);
  font-weight: 500;
}

.project-pair aside {
  margin-top: 0.125rem;
  font-size: 1rem;
  line-height: 1.5rem;
  color: var(--c-secondary);
}

/* =========================================================================
   Footer
   ========================================================================= */

.site-footer {
  margin-top: 5rem;
  font-size: 1.125rem;
  line-height: 1.75rem;
  display: flex;
  flex-direction: column;
}

.footer-row {
  display: flex;
  align-items: center;
}

.footer-row > * + * {
  margin-left: 1rem;
}

.footer-row span {
  color: var(--c-secondary);
}

.footer-row hr {
  margin-top: 0.125rem;
  width: 100%;
  border-style: dotted;
  border-color: var(--c-rule);
}


/* =========================================================================
   Colophon
   ========================================================================= */

.colophon {
  margin-top: 1.5rem;
  font-size: 1rem;
  line-height: 1.5rem;
  color: var(--c-muted);
}

/* =========================================================================
   Home — portrait + intro
   ========================================================================= */

/* Same 1fr/2fr split as the project rows, so the portrait column lines up
   with the names below it. */
.intro {
  display: grid;
  row-gap: 1.5rem;
  margin-bottom: 3.5rem;
}

@media (min-width: 640px) {
  .intro {
    grid-template-columns: 1fr 2fr;
    column-gap: 2rem;
  }
}

.portrait img {
  width: 100%;
  max-width: 240px;
  border-radius: 0.375rem;
}

/* =========================================================================
   Two-column rows (selected work, experience)
   ========================================================================= */

.pair-list {
  line-height: 1.375;
}

.pair-list > * + * {
  margin-top: 1rem;
}

.pair-list-label {
  padding-bottom: 0.5rem;
}

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

.project {
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
}

.project-title {
  color: var(--c-black);
  font-size: 1.25rem;
  line-height: 1.75rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.pills {
  display: flex;
  flex-wrap: wrap;
  margin-bottom: 0.25rem;
}

.pill {
  display: flex;
  align-items: center;
  font-size: 0.875rem;
  line-height: 1.25rem;
  font-weight: 500;
  margin-right: 0.375rem;
  margin-bottom: 0.5rem;
  border-radius: 9999px;
  background-color: var(--c-surface);
  padding: 1px 0.375rem;
}

.project-tagline {
  font-size: 1.125rem;
  line-height: 1.75rem;
  font-weight: 300;
  margin-bottom: 0.75rem;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

@media (min-width: 768px) {
  .project-grid {
    gap: 2rem;
  }
}

@media (min-width: 1024px) {
  .project-grid {
    gap: 3rem;
  }
}

.project-main,
.project-aside {
  grid-column: span 3 / span 3;
}

@media (min-width: 768px) {
  .project-main {
    grid-column: span 2 / span 2;
  }
  .project-aside {
    grid-column: span 1 / span 1;
  }
}

.project-body p {
  margin-bottom: 1rem;
}

.project-body strong {
  font-weight: 600;
}

.project-body code {
  font-size: 95%;
}

/* Screenshot treatments. Pick one per image, or neither: rounded when the shot
   has no frame of its own, bordered when it's light to the edge. */
.shot-rounded {
  border-radius: 0.375rem;
}

.shot-bordered {
  border-width: 1px;
}

/* The tetrahedron easter egg, sized to the frame its canvas reports. */
.tetra-line {
  display: flex;
  align-items: center;
}

.tetra {
  flex: 0 0 auto;
  width: 58px;
  height: 58px;
  margin-left: -0.5rem;
  margin-right: 0.5rem;
  border: 0;
}

/* =========================================================================
   Random — figure + quotes
   ========================================================================= */

.figure {
  margin: 2.5rem 0;
  text-align: center;
}

.figure img {
  max-width: min(350px, 100%);
  margin: 0 auto 0.25rem;
}

.figure figcaption {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--c-secondary);
}

.quote-list {
  line-height: 1.375;
}

.quote-list > * + * {
  margin-top: 1rem;
}

.quote-list li .who {
  display: block;
  margin-top: 0.125rem;
  color: var(--c-muted);
}

/* =========================================================================
   Writing
   ========================================================================= */

.post-list {
  display: grid;
  row-gap: 1rem;
}

.post {
  display: block;
  margin-left: -0.75rem;
  margin-right: -0.75rem;
  padding: 0.5rem 0.75rem;
}

.post:hover {
  background-color: var(--c-surface);
}

.post-head {
  display: flex;
  flex-direction: column;
  margin-bottom: 0.375rem;
}

.post-title {
  font-size: 1.125rem;
  line-height: 1.75rem;
  color: var(--c-black);
}

.post-date {
  margin-bottom: 0.125rem;
  color: var(--c-secondary);
}

.post-blurb {
  font-size: 1.125rem;
  line-height: 1.375;
  font-family: var(--font-serif);
  font-style: italic;
}

@media (min-width: 640px) {
  .post-head {
    flex-direction: row;
    align-items: flex-end;
  }
  .post-date {
    margin-left: auto;
  }
}

/* Placeholder rows, until the real thing exists. */
.is-placeholder {
  color: var(--c-muted);
}

.is-placeholder .post-title,
.is-placeholder .post-date {
  color: var(--c-muted);
}