/* palette: cool ink + paper, with a teal primary and a coral secondary.
   --accent is for links and interactive things, --accent-2 for emphasis. */
:root {
  --bg: #eceee6;
  --fg: #0d1013;
  --muted: #54585e;
  --rule: #e0ddd4;
  --accent: #1d7a63;
  --accent-2: #dc7150;
  --sans: ui-sans-serif, -apple-system, "Segoe UI", Inter, Helvetica, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, monospace;
}

:root[data-theme="dark"] {
  --bg: #0d1513;
  --fg: #f0f4f2;
  --muted: #a6b1ab;
  --rule: #212b2e;
  --accent: #4fcfa5;
  --accent-2: #f7a183;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d1513;
    --fg: #f0f4f2;
    --muted: #a6b1ab;
    --rule: #212b2e;
    --accent: #4fcfa5;
    --accent-2: #f7a183;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  /* three soft teal washes — upper left, upper right, and a pool along the
     bottom — over the flat page colour. fixed, so they don't scroll away. */
  background:
    radial-gradient(60rem 38rem at 8% -8%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 68%),
    radial-gradient(55rem 34rem at 105% 12%, color-mix(in srgb, var(--accent) 15%, transparent), transparent 70%),
    radial-gradient(70rem 40rem at 50% 108%, color-mix(in srgb, var(--accent) 12%, transparent), transparent 72%),
    var(--bg);
  background-attachment: fixed;
  position: relative;
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;   /* a scaled-up photo must never widen the page */
  -webkit-font-smoothing: antialiased;
  transition: background 0.25s ease, color 0.25s ease;
}

/* a whisper of grain over the whole page — keeps the gradients from banding */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* a faint dot grid, fading out towards the bottom so the page ends quietly */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: radial-gradient(
    circle at 1px 1px,
    color-mix(in srgb, var(--accent-2) 55%, transparent) 1.1px,
    transparent 0
  );
  background-size: 24px 24px;
  opacity: 0.4;
  -webkit-mask-image: radial-gradient(90rem 65rem at 50% 0%, #000 35%, transparent 85%);
  mask-image: radial-gradient(90rem 65rem at 50% 0%, #000 35%, transparent 85%);
}

main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 5rem 1.5rem 5rem;
  /* sits above the backdrop layers (.theme and .blog-fab are already fixed) */
  position: relative;
  z-index: 1;
}

/* --- intro --- */

h1::after {
  content: '.';
  color: var(--accent-2);
  display: inline-block;
  /* a slow pulse, so the page has a heartbeat even when nothing is happening */
  animation: pulse 4s ease-in-out infinite 1s;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.9); }
}

h1 {
  font-size: clamp(2.25rem, 8vw, 3.25rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.05;
  margin: 0;
}

.tagline {
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  line-height: 1.4;
  color: color-mix(in srgb, var(--accent-2) 75%, var(--muted));
  margin: 0.9rem 0 0;
}

.blurb {
  margin: 1.75rem 0 0;
  max-width: 34rem;
  color: var(--muted);
}

.blurb .hl { color: var(--accent-2); font-weight: 500; }

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 1.75rem;
  font-family: var(--mono);
  font-size: 0.8125rem;
}

.links a {
  position: relative;
  color: var(--fg);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 2px;
  transition: color 0.15s;
}

/* a coral rule sweeps across the grey one on hover */
.links a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: var(--accent-2);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

.links a:hover::after { transform: scaleX(1); }

.links a:hover { color: var(--accent-2); }

/* --- sections --- */

section { margin-top: 4.5rem; }

/* the about copy follows straight on from the header links */
.about { margin-top: 2.5rem; }

h2::before {
  content: '';
  display: inline-block;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 1px;
  background: var(--accent-2);
  margin-right: 0.6rem;
  vertical-align: middle;
}

h2 {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 1.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid color-mix(in srgb, var(--accent-2) 30%, var(--rule));
}

.entries { list-style: none; margin: 0; padding: 0; }

.entries > li + li {
  margin-top: 2.25rem;
  padding-top: 2.25rem;
  border-top: 1px solid var(--rule);
}

.row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
}

.what { font-size: 1rem; }
.what strong { font-weight: 600; }

.when {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
  white-space: nowrap;
}

.entries p {
  margin: 0.6rem 0 0;
  color: var(--muted);
  font-size: 0.9375rem;
}

.stack {
  font-family: var(--mono);
  font-size: 0.75rem !important;
  color: var(--muted);
  opacity: 0.75;
  margin-top: 0.75rem !important;
}

/* --- skills --- */

.skills { margin: 0; }

.skills > div {
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: 1rem;
  padding: 0.75rem 0;
}

.skills > div + div { border-top: 1px solid var(--rule); }

dt {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
  padding-top: 0.2rem;
}

dd { margin: 0; font-size: 0.9375rem; }

/* --- footer --- */

footer {
  margin-top: 5rem;
  padding-top: 1.75rem;
  /* same tint as the rule under section headings */
  border-top: 1px solid color-mix(in srgb, var(--accent-2) 30%, var(--rule));
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
}

footer a { color: var(--muted); }
footer a:hover { color: var(--accent-2); }

/* --- theme toggle --- */

.theme {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid var(--rule);
  border-radius: 50%;
  background: var(--bg);
  color: var(--muted);
  font-size: 0.875rem;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.theme:hover { color: var(--accent-2); border-color: var(--accent-2); transform: rotate(180deg); }
.theme:active { transform: rotate(180deg) scale(0.92); }

/* --- entrance --- */

.intro {
  animation: rise 0.6s ease backwards;
}

/* sections fade up as they come into view — js adds .reveal, then .in.
   without js they simply render, so nothing is ever stuck hidden. */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.in { opacity: 1; transform: none; }

/* photos in the gallery arrive one after another */
.reveal .gallery figure {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.in .gallery figure { opacity: 1; transform: none; }
.reveal.in .gallery figure:nth-child(2) { transition-delay: 0.1s; }
.reveal.in .gallery figure:nth-child(3) { transition-delay: 0.2s; }

/* the heading marker draws itself in */
.reveal h2::before { transform: scale(0); transition: transform 0.5s cubic-bezier(0.34, 1.4, 0.64, 1) 0.15s; }
.reveal.in h2::before { transform: scale(1); }

/* the header lands in three beats — name, tagline, links — rather than at once */
.intro h1 { animation: rise 0.6s ease backwards; animation-delay: 0.05s; }
.intro .tagline { animation: rise 0.6s ease backwards; animation-delay: 0.18s; }
.intro .links { animation: rise 0.6s ease backwards; animation-delay: 0.3s; }

@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* --- breadcrumb / lede --- */

.crumb {
  font-family: var(--mono);
  font-size: 0.75rem;
  margin: 0 0 1.5rem;
}

.crumb a { color: var(--muted); text-decoration: none; }
.crumb a:hover { color: var(--accent-2); }

.lede {
  margin: -0.75rem 0 1.5rem;
  color: var(--muted);
  font-size: 0.9375rem;
}

kbd {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent-2);
  border: 1px solid color-mix(in srgb, var(--accent-2) 40%, transparent);
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--fg);
}

/* --- project links --- */

.title-link { color: inherit; text-decoration: none; border-bottom: 1px solid var(--rule); }
.title-link:hover { color: var(--accent-2); border-color: var(--accent-2); }

.projlinks {
  display: flex;
  gap: 1rem;
  font-family: var(--mono);
  font-size: 0.75rem !important;
  margin-top: 0.75rem !important;
}

.projlinks a { color: var(--accent); text-decoration: none; }
.projlinks a:hover { text-decoration: underline; }

/* --- about --- */

/* the prose intro — wider measure than .blurb, since it's the main read */
.about p {
  /* the gap between paragraphs has to beat the gap between lines, or the
     block reads as one wall of text */
  margin: 0 0 1.6rem;
  max-width: 36rem;
  line-height: 1.7;
  color: var(--muted);
}

.about p:last-child { margin-bottom: 0; }

.about .hl { color: var(--accent-2); }

.about a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
}

.about a:hover { border-bottom-color: var(--accent); }

/* a photo inside a blog post */
.post-photo { margin: 1.5rem 0; }

/* floated inside a paragraph, so the text wraps around it */
.post-photo.float {
  float: right;
  width: 15rem;
  max-width: 45%;
  margin: 0.25rem 0 1rem 1.5rem;
}

@media (max-width: 34rem) {
  .post-photo.float { float: none; width: 100%; max-width: none; margin: 1.25rem 0; }
}

.post-photo img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 6px;
  display: block;
  cursor: pointer;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease;
}

.post-photo img:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.22);
}

.post-photo figcaption {
  margin-top: 0.6rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
}

/* biometric os has no url yet — it still reads like the links around it */
.about .faux-link {
  color: var(--accent);
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
}

/* the blog link is pinned bottom-right so it's reachable from anywhere on the page */
.blog-fab {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 20;
  padding: 0.6rem 1.15rem;
  border: 1px solid var(--accent-2);
  border-radius: 999px;
  /* filled, not outlined — it should read as the one thing to click down here */
  background: var(--accent-2);
  color: var(--bg);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  box-shadow: 0 6px 20px color-mix(in srgb, var(--accent-2) 35%, transparent);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.blog-fab:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 26px color-mix(in srgb, var(--accent-2) 45%, transparent);
}

.blog-fab::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: 999px;
  border: 1px solid var(--accent-2);
  /* a ring drifts outward every few seconds, then rests */
  animation: ripple 6s ease-out infinite 2s;
  pointer-events: none;
}

@keyframes ripple {
  0% { opacity: 0.55; transform: scale(1); }
  35%, 100% { opacity: 0; transform: scale(1.35); }
}

.blog-btn-arrow { display: inline-block; transition: transform 0.15s ease; }
.blog-fab:hover .blog-btn-arrow { transform: translateX(3px); }

/* --- gallery --- */

/* a little extra bottom space for the hover lift */
.gallery-section { margin-top: 3.5rem; margin-bottom: 4rem; }

/* between paragraphs: same measure as the prose, and even space either side
   (the paragraph above already contributes its own 1.15rem bottom margin) */
.about .gallery-section {
  max-width: 36rem;
  margin: 0.4rem 0 2rem;
}

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

.gallery figure {
  margin: 0;
  position: relative;
  /* grow downward only — the intro copy sits directly above the gallery */
  transform-origin: top center;
  /* promote to its own layer so the scale is composited, not repainted */
  will-change: transform;
  backface-visibility: hidden;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* hover lifts the photo above its neighbours instead of pushing them around */
.gallery figure:hover,
.gallery figure:focus-within {
  transform: scale(1.06);
  z-index: 3;
}

/* edge photos grow inward so they don't run off the page */
.gallery figure:first-child { transform-origin: top left; }
.gallery figure:last-child { transform-origin: top right; }

/* placeholder box — replace the div with an <img> and this rule stops applying */
.gallery .ph {
  aspect-ratio: 3 / 2;
  border: 1px dashed var(--rule);
  border-radius: 6px;
  background:
    repeating-linear-gradient(45deg, transparent 0 8px, var(--rule) 8px 9px);
  display: grid;
  place-items: center;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.gallery .ph::after { content: attr(data-label); }

/* the photos open in the lightbox on click */
.gallery img { cursor: pointer; }

/* photos are 3:2 out of the camera — match it so nothing gets cropped away */
.gallery img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 6px;
  display: block;
  transition: box-shadow 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.gallery figure:hover img,
.gallery figure:focus-within img {
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

.gallery figure:hover figcaption,
.gallery figure:focus-within figcaption {
  color: var(--accent-2);
}

/* --- lightbox --- */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-content: center;
  gap: 0.9rem;
  padding: 2rem;
  background: rgba(0, 0, 0, 0.82);
}

.lightbox[hidden] { display: none; }

.lightbox img {
  max-width: min(70vw, 820px);
  max-height: 66vh;
  width: auto;
  height: auto;
  border-radius: 6px;
  cursor: default;
}

.lightbox-caption {
  margin: 0;
  text-align: center;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: #d8d8d8;
}

/* flip through photos */
.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 2.75rem;
  height: 2.75rem;
  display: grid;
  place-items: center;
  border: 1px solid color-mix(in srgb, #fff 35%, transparent);
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.35);
  color: #fff;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.15s;
}

.lightbox-prev:hover,
.lightbox-next:hover {
  background: rgba(0, 0, 0, 0.6);
  border-color: #fff;
}

.lightbox-prev { left: 1.25rem; }
.lightbox-next { right: 1.25rem; }

.lightbox-prev:hover { transform: translateY(-50%) translateX(-2px); }
.lightbox-next:hover { transform: translateY(-50%) translateX(2px); }

.lightbox-prev[hidden],
.lightbox-next[hidden],
.lightbox-count[hidden] { display: none; }

.lightbox-count {
  margin: 0;
  text-align: center;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: #b9b9b9;
}

@media (max-width: 34rem) {
  .lightbox-prev { left: 0.4rem; }
  .lightbox-next { right: 0.4rem; }
}

.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  background: none;
  border: 0;
  color: #fff;
  font-size: 2rem;
  line-height: 1;
  cursor: pointer;
}

.gallery figcaption {
  margin-top: 0.5rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
  transition: color 0.28s ease;
}

/* --- blog posts --- */

.post { border-bottom: 1px solid var(--rule); }
.post:first-of-type { border-top: 1px solid var(--rule); }

.post-head {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  background: none;
  border: 0;
  padding: 1.25rem 0;
  cursor: pointer;
  text-align: left;
  color: inherit;
  font: inherit;
}

.post-title { font-size: 1rem; transition: color 0.15s; }
.post-head:hover .post-title { color: var(--accent-2); }

.post-title::before {
  content: '+';
  font-family: var(--mono);
  color: var(--accent-2);
  margin-right: 0.6rem;
}

.post.open .post-title::before { content: '–'; }

/* the grid 0fr trick only collapses the first row, so a post with several
   paragraphs leaked everything after the first one. clip the whole body instead. */
.post-body {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
}

.post.open .post-body {
  max-height: 200rem;
  opacity: 1;
}

.post-body p {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.9375rem;
  max-width: 34rem;
}

.post.open .post-body p:first-child { margin-top: 0.25rem; }
.post.open .post-body p:last-child { margin-bottom: 1.5rem; }

/* --- terminal frame (game) --- */

.term {
  border: 1px solid var(--rule);
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg);
}

.term-head {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 0.85rem;
  border-bottom: 1px solid var(--rule);
}

.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--rule); }
.dot.r { background: #e06c5a; }
.dot.y { background: #d9a84e; }
.dot.g { background: #6fae72; }

.term-head .dot { animation: blink 5s ease-in-out infinite; }
.term-head .dot.y { animation-delay: 0.8s; }
.term-head .dot.g { animation-delay: 1.6s; }

@keyframes blink {
  0%, 82%, 100% { opacity: 1; }
  88% { opacity: 0.35; }
}

.term-title {
  margin-left: 0.5rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
}

.term-body { padding: 0.85rem; }

.hud {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.hud b { color: var(--accent-2); font-weight: 500; }

.stage { position: relative; }

#invaders {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 4px;
  outline: none;
  touch-action: manipulation;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 0.4rem;
  text-align: center;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  border-radius: 4px;
}

.overlay[hidden] { display: none; }

.ov-title {
  color: var(--accent-2);
  margin: 0;
  font-family: var(--mono);
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.ov-sub {
  margin: 0 0 0.5rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  max-width: 22rem;
}

.btn {
  font-family: var(--mono);
  font-size: 0.75rem;
  padding: 0.45rem 1.1rem;
  border: 1px solid var(--rule);
  border-radius: 5px;
  background: var(--bg);
  color: var(--fg);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.btn:hover { border-color: var(--accent-2); color: var(--accent-2); }

.btn.primary { border-color: var(--accent-2); color: var(--accent-2); }
.btn.primary:hover { background: var(--accent-2); color: var(--bg); }

@media (max-width: 34rem) {
  main { padding-top: 5rem; }
  .when { font-size: 0.7rem; }
  .skills > div { grid-template-columns: 1fr; gap: 0.25rem; }
  .gallery { grid-template-columns: 1fr; }
  /* full-width photos can't grow much without leaving the screen */
  .gallery-section { margin-bottom: 0; }
  .gallery figure:hover,
  .gallery figure:focus-within { transform: scale(1.03); }
  .hud { gap: 0.9rem; }
}