/* ---------- Design tokens ---------- */
:root {
  --color-bg: #ffffff;
  --color-bg-subtle: #f5f6f8;
  --color-surface: #ffffff;
  --color-border: #e3e5e9;
  --color-text: #16181d;
  --color-text-muted: #5b6070;
  --color-accent: #1d4ed8;
  --color-accent-contrast: #ffffff;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --content-width: 1080px;
  --radius: 10px;
  --shadow-sm: 0 1px 2px rgba(16, 18, 22, 0.06);
  --shadow-md: 0 8px 24px rgba(16, 18, 22, 0.08);

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #101114;
    --color-bg-subtle: #16181d;
    --color-surface: #1a1c21;
    --color-border: #2a2d34;
    --color-text: #eef0f3;
    --color-text-muted: #9aa0ad;
    --color-accent: #6f95f7;
    --color-accent-contrast: #101114;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  }
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img,
video {
  max-width: 100%;
  display: block;
  height: auto;
  border-radius: var(--radius);
}

a {
  color: inherit;
  text-decoration: none;
}

h1,
h2,
h3,
h4 {
  line-height: 1.2;
  margin: 0 0 var(--space-2);
  font-weight: 700;
  letter-spacing: -0.01em;
}

p {
  margin: 0 0 var(--space-2);
}

ul,
ol {
  padding-left: 1.25em;
  margin: 0 0 var(--space-2);
}

li + li {
  margin-top: 0.35em;
}

.wrap {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-1);
}

.lede {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 60ch;
}

/* ---------- Buttons ---------- */
.button {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  padding: 0.6em 1.1em;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.button:hover {
  opacity: 0.88;
}

.button--small {
  padding: 0.45em 0.95em;
  font-size: 0.85rem;
}

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(8px);
  z-index: 10;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
}

.site-header__name {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-header__nav a:not(.button) {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 0.95rem;
}

.site-header__nav a:not(.button):hover {
  color: var(--color-text);
}

/* ---------- Hero ---------- */
.hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  align-items: center;
  padding-top: var(--space-5);
  padding-bottom: var(--space-5);
}

.hero h1 {
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  margin-bottom: var(--space-2);
}

.hero__image img {
  aspect-ratio: 4 / 3;
  object-fit: cover;
  width: 100%;
  box-shadow: var(--shadow-md);
}

/* The hero photo is the Corvair, so it links through to that project. */
.hero__image-link {
  display: block;
  border-radius: var(--radius);
}

.hero__image-link img {
  transition: transform 0.15s ease;
}

.hero__image-link:hover img,
.hero__image-link:focus-visible img {
  transform: translateY(-2px);
}

@media (min-width: 800px) {
  .hero {
    grid-template-columns: 1.1fr 0.9fr;
  }
}

/* ---------- Section titles ---------- */
.section-title {
  font-size: 1.6rem;
  margin-bottom: var(--space-3);
}

/* ---------- Project grid ---------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-3);
  padding-bottom: var(--space-6);
}

.project-card {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.project-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in srgb, var(--color-accent) 40%, var(--color-border));
}

.project-card__thumb {
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.project-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
}

.project-card__body {
  padding: var(--space-2) var(--space-3) var(--space-3);
}

.project-card__body h3 {
  font-size: 1.1rem;
  margin-bottom: 0.35em;
}

.project-card__body p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin: 0;
}

/* ---------- Project page ---------- */
.project-page {
  padding-top: var(--space-5);
  padding-bottom: var(--space-4);
}

.project-page h1 {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
}

.project-page__hero {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  margin-top: var(--space-3);
  box-shadow: var(--shadow-md);
}

.prose {
  margin-top: var(--space-4);
}

/*
  The prose column now spans the full container so images can use the width.
  Running text is capped per-block instead, to keep the line length readable;
  visual blocks opt back out below.
*/
.prose > * {
  max-width: 72ch;
}

.prose > .split,
.prose > .gallery,
.prose > figure,
.prose > p:has(img) {
  max-width: none;
}

.prose h2 {
  font-size: 1.5rem;
  margin-top: var(--space-5);
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-border);
}

.prose h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.prose h3 {
  font-size: 1.15rem;
  margin-top: var(--space-3);
}

.prose img,
.prose video {
  margin: var(--space-3) 0;
  box-shadow: var(--shadow-sm);
}

/*
  Several of the technical images are screenshots exported as PNGs with a
  transparent background and dark text — spreadsheets of calculations, mostly.
  Against the dark theme that text vanishes. A white backdrop keeps them
  readable; opaque photos cover it completely, so it costs them nothing.
*/
.prose img {
  background-color: #fff;
}

.prose figure {
  margin: var(--space-3) 0;
}

.prose figure > img,
.prose figure > video {
  margin: 0;
}

.prose figcaption {
  margin-top: var(--space-1);
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.prose a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--color-accent) 40%, transparent);
  text-underline-offset: 0.15em;
}

.prose blockquote {
  margin: var(--space-3) 0;
  padding-left: var(--space-2);
  border-left: 3px solid var(--color-accent);
  color: var(--color-text-muted);
}

.wip-badge {
  display: inline-block;
  background: color-mix(in srgb, var(--color-accent) 12%, transparent);
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 0.3em 0.8em;
  border-radius: 999px;
  margin-bottom: var(--space-3);
}

.todo-note {
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-3);
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin: var(--space-3) 0;
}

/* ---------- Two-column sections ---------- */
/*
  Built by the `splitProse` filter in .eleventy.js, which pairs a run of images
  with the prose above it. Text left, images right.
*/
.split {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: var(--space-3) var(--space-4);
  align-items: start;
  margin: var(--space-3) 0 var(--space-4);
}

.split__text > :first-child {
  margin-top: 0;
}

.split__text > :last-child {
  margin-bottom: 0;
}

/*
  A single image fills the column so hero shots stay large; a run of several
  wraps into a grid instead, which keeps the block roughly as tall as the text
  beside it rather than trailing far below it.
*/
.split__media {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 210px), 1fr));
  gap: var(--space-2);
  align-items: start;
}

/* Markdown wraps each image run in a <p>; unwrap it so the images
   themselves become the flex items and pick up the gap. */
.split__media p {
  display: contents;
}

.split__media img {
  width: 100%;
  margin: 0;
  box-shadow: var(--shadow-sm);
}

@media (max-width: 860px) {
  .split {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }
}

/* ---------- Gallery ---------- */
.gallery {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  margin: var(--space-3) 0;
  padding-bottom: var(--space-1);
  max-width: 100vw;
  margin-left: calc(var(--space-3) * -1);
  margin-right: calc(var(--space-3) * -1);
  padding-left: var(--space-3);
  padding-right: var(--space-3);
}

.gallery__item {
  flex: 0 0 auto;
  width: min(78vw, 360px);
  scroll-snap-align: start;
  margin: 0;
}

.gallery__item img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* ---------- Prev/Next ---------- */
.project-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-3);
  padding-bottom: var(--space-5);
}

.project-nav__link {
  display: flex;
  flex-direction: column;
  padding: var(--space-2);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  transition: border-color 0.15s ease, background 0.15s ease;
}

.project-nav__link:hover {
  border-color: var(--color-accent);
  background: var(--color-bg-subtle);
}

.project-nav__link--next {
  text-align: right;
  align-items: flex-end;
}

.project-nav__label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: 0.25em;
}

.project-nav__title {
  font-weight: 600;
}

.project-nav__link.is-hidden {
  visibility: hidden;
}

@media (max-width: 560px) {
  .project-nav {
    grid-template-columns: 1fr;
  }
  .project-nav__link.is-hidden {
    display: none;
  }
}

/* ---------- Contact page ---------- */
.contact-page {
  padding-top: var(--space-5);
  padding-bottom: var(--space-6);
}

.contact-list {
  margin: var(--space-4) 0 0;
  max-width: 40ch;
}

.contact-list__row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border);
}

.contact-list__row dt {
  color: var(--color-text-muted);
  font-weight: 500;
}

.contact-list__row dd {
  margin: 0;
  font-weight: 600;
  text-align: right;
}

.contact-list__row a:hover {
  color: var(--color-accent);
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-5);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2);
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.site-footer__inner p {
  margin: 0;
}

.site-footer__links {
  display: flex;
  gap: var(--space-2);
}

.site-footer__links a:hover {
  color: var(--color-text);
}