/* ============================================================
   Yuchen Lu · academic homepage
   Pure white and typographic first, with a few details borrowed
   from a camera and a darkroom: the portrait sits in the main site's
   viewfinder, the photographs sit on strips of film cut to each
   picture's shape, and opening one dims the room.
   ============================================================ */

@font-face {
  font-family: 'Newsreader';
  font-style: normal;
  font-weight: 200 800;
  font-display: swap;
  src: url('../fonts/newsreader-latin.woff2') format('woff2');
}
@font-face {
  font-family: 'Newsreader';
  font-style: italic;
  font-weight: 200 800;
  font-display: swap;
  src: url('../fonts/newsreader-italic-latin.woff2') format('woff2');
}
@font-face {
  font-family: 'Caveat';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('../fonts/caveat-latin.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('../fonts/inter-var-latin.woff2') format('woff2');
}

:root {
  --paper: #ffffff;
  --ink: #19191b;
  --graphite: #56585d; /* secondary text, 7:1 on white */
  --quiet: #75777c; /* dates and small print, 4.6:1 */
  --rule: #e8e8e5;
  --film: #141414;
  --gate: #070707;
  --edge-print: #d9a441; /* the amber of film edge numbers */
  --rec: #c8321e; /* a camera's record light */
  /* the main site's star gold, in the deeper shade it uses on light ground,
     and the soft glow around it */
  --star: hsl(36 85% 38%);
  --star-glow: hsl(45 95% 60%);

  --serif: 'Newsreader', 'Iowan Old Style', 'Palatino Linotype', Georgia, serif;
  --hand: 'Caveat', 'Bradley Hand', 'Segoe Print', cursive;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;

  --glide: cubic-bezier(0.22, 1, 0.36, 1);
  --spring: cubic-bezier(0.25, 1.4, 0.4, 1);

  --measure: 56rem;
  --wide: 78rem;
  --gutter: 1.5rem;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 0.9375rem;
  line-height: 1.58;
  font-feature-settings: 'kern', 'liga', 'calt';
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: #f4e7c6;
  color: var(--ink);
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-decoration-color: #cfcfcb;
  text-underline-offset: 0.24em;
  transition:
    text-decoration-color 180ms ease,
    color 180ms ease;
}
a:hover {
  text-decoration-color: currentColor;
}

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip {
  position: absolute;
  left: var(--gutter);
  top: -3rem;
  padding: 0.5rem 0.75rem;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  z-index: 10;
}
.skip:focus {
  top: 1rem;
}

/* ---------- column ---------- */

main,
.photography-head,
.albums-head,
.colophon {
  max-width: calc(var(--measure) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

main {
  padding-top: clamp(3rem, 9vh, 5.5rem);
}

p {
  margin: 0 0 1rem;
}

h2 {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0 0 1.15rem;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.375rem;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
/* the rule after a heading marks where a section starts at a glance */
h2::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--rule);
}

h3 {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 560;
  line-height: 1.45;
  letter-spacing: -0.004em;
}

section {
  margin-top: 3.6rem;
}

/* compound words stay whole at a line end */
.nobr {
  white-space: nowrap;
}

/* credits: people and venues are set in the serif italic throughout */
.with,
.venue {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.45;
  color: var(--graphite);
}

/* ---------- intro ---------- */

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 8.5rem;
  gap: 3rem;
  align-items: start;
}

.name {
  margin: 0 0 1.15rem;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(2.5rem, 5vw, 3rem);
  line-height: 1;
  letter-spacing: -0.028em;
}

.intro-text p:not(.status) {
  font-size: 1rem;
  line-height: 1.6;
  text-wrap: pretty;
}

.status {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  margin: 1.3rem 0 0.9rem;
  font-size: 0.9375rem;
}

/* centred on the first line, so it stays put if the line wraps */
.rec {
  flex: none;
  width: 7px;
  height: 7px;
  margin-top: calc(0.79em - 3.5px);
  border-radius: 50%;
  background: var(--rec);
  box-shadow: 0 0 0 3px rgb(200 50 30 / 0.12);
  animation: rec 2.4s ease-in-out infinite;
}

@keyframes rec {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.35;
  }
}

/* contact and profiles as a row of icons; each one names itself on hover */
.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin: 0 0 0 -0.55rem; /* the first glyph lines up with the text above */
  padding: 0;
  list-style: none;
}

.links a {
  position: relative;
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  color: var(--graphite);
  text-decoration: none;
  transition:
    color 200ms ease,
    background-color 200ms ease;
}
.links a:hover,
.links a:focus-visible {
  color: var(--ink);
  background: #f1f1ef;
}

.links a svg {
  width: 1.2rem;
  height: 1.2rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.links a::after {
  content: attr(data-tip);
  position: absolute;
  top: calc(100% + 0.3rem);
  left: 50%;
  z-index: 2;
  padding: 0.2rem 0.55rem;
  border-radius: 5px;
  background: var(--ink);
  color: var(--paper);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.35;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transform: translate(-50%, -3px);
  transition:
    opacity 160ms ease,
    transform 260ms var(--glide);
}
.links a:hover::after,
.links a:focus-visible::after {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* the main site's icon, in its gold, with a note in the margin pointing at it */
.home-item {
  display: flex;
  align-items: center;
}

.links a.home {
  color: var(--star);
}
.links a.home svg {
  filter: drop-shadow(0 0 3px hsl(45 95% 58% / 0.65));
}
.links a.home:hover,
.links a.home:focus-visible {
  color: var(--star);
  background: hsl(45 90% 60% / 0.14);
}

.handnote {
  display: flex;
  align-items: center;
  margin-left: 0.15rem;
  color: var(--star);
  pointer-events: none;
}

.hand-arrow {
  flex: none;
  width: 3.4rem;
  height: auto;
  margin-top: 0.35rem;
  overflow: visible;
}
.hand-arrow path {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.4;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 1;
  stroke-dashoffset: 0;
}

.hand-text {
  max-width: 9.5rem;
  margin: -0.55rem 0 0 0.3rem;
  font-family: var(--hand);
  font-size: 1.1875rem;
  line-height: 1.05;
  transform: rotate(-3deg);
  transform-origin: left center;
}

/* drawn once, after the portrait has come into focus */
.js .hand-line {
  stroke-dashoffset: 1;
  animation: hand-draw 1.1s cubic-bezier(0.45, 0.05, 0.3, 1) 1.5s forwards;
}
.js .hand-head {
  stroke-dashoffset: 1;
  animation: hand-draw 0.3s ease-out 2.5s forwards;
}
.js .hand-text {
  opacity: 0;
  animation: hand-ink 0.9s ease 1.3s forwards;
}
@keyframes hand-draw {
  to {
    stroke-dashoffset: 0;
  }
}
@keyframes hand-ink {
  to {
    opacity: 1;
  }
}

/* ---------- portrait: the main site's viewfinder ---------- */

/* As on yuchenlu.me: a small lit screen held in gold viewfinder corners,
   the picture drifting a little as if the phone were held in hand, and
   film grain on top.
   Here it also comes into focus once when the page opens. */
.portrait {
  position: relative;
  width: 8.5rem;
  margin: 0.5rem 0 0;
  justify-self: end;
}

/* a soft gold light around the screen */
.portrait-glow {
  position: absolute;
  inset: -1.75rem;
  z-index: -1;
  background: radial-gradient(closest-side, hsl(45 95% 60% / 0.2), hsl(45 95% 60% / 0.06) 60%, transparent);
  pointer-events: none;
}

.portrait-lens {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: 3px;
  background: #efefed;
  box-shadow:
    0 0 0 1px hsl(36 85% 38% / 0.16),
    0 12px 30px -14px rgb(0 0 0 / 0.4);
}

/* handheld: the whole picture drifts and turns a
   little; scaled up 8% so the drift never shows an edge */
.portrait-plate {
  position: absolute;
  inset: 0;
  transform: scale(1.08);
  animation: vf-handheld 9s ease-in-out infinite;
}

.portrait-plate img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* film grain, overlaid so mid grey leaves the brightness alone */
.grain {
  position: absolute;
  inset: -100%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='96' height='96'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.95' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 96px 96px;
  opacity: 0.4;
  mix-blend-mode: overlay;
  pointer-events: none;
  animation: vf-grain 0.6s steps(1) infinite;
}

.vignette {
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 22px rgb(0 0 0 / 0.3);
  pointer-events: none;
}

/* four L-shaped gold corners, 7px outside the picture, sharing one glow */
.viewfinder {
  position: absolute;
  inset: 0;
  pointer-events: none;
  filter: drop-shadow(0 0 4px hsl(45 95% 55% / 0.55));
}
.viewfinder i {
  position: absolute;
  width: 12px;
  height: 12px;
  border: 0 solid hsl(38 85% 46% / 0.9);
}
.viewfinder i:nth-child(1) {
  left: -7px;
  top: -7px;
  border-left-width: 1.5px;
  border-top-width: 1.5px;
  border-top-left-radius: 2px;
}
.viewfinder i:nth-child(2) {
  right: -7px;
  top: -7px;
  border-right-width: 1.5px;
  border-top-width: 1.5px;
  border-top-right-radius: 2px;
}
.viewfinder i:nth-child(3) {
  left: -7px;
  bottom: -7px;
  border-left-width: 1.5px;
  border-bottom-width: 1.5px;
  border-bottom-left-radius: 2px;
}
.viewfinder i:nth-child(4) {
  right: -7px;
  bottom: -7px;
  border-right-width: 1.5px;
  border-bottom-width: 1.5px;
  border-bottom-right-radius: 2px;
}

@keyframes vf-handheld {
  0%,
  100% {
    transform: translate3d(0, 0, 0) rotate(0deg) scale(1.08);
  }
  25% {
    transform: translate3d(3px, -2px, 0) rotate(0.7deg) scale(1.08);
  }
  50% {
    transform: translate3d(-1px, 3px, 0) rotate(-0.5deg) scale(1.08);
  }
  75% {
    transform: translate3d(-3px, -1px, 0) rotate(0.3deg) scale(1.08);
  }
}

@keyframes vf-grain {
  0%,
  100% {
    transform: translate3d(0, 0, 0);
  }
  10% {
    transform: translate3d(-5%, -10%, 0);
  }
  20% {
    transform: translate3d(-15%, 5%, 0);
  }
  30% {
    transform: translate3d(7%, -25%, 0);
  }
  40% {
    transform: translate3d(-5%, 25%, 0);
  }
  50% {
    transform: translate3d(-15%, 10%, 0);
  }
  60% {
    transform: translate3d(15%, 0, 0);
  }
  70% {
    transform: translate3d(0, 15%, 0);
  }
  80% {
    transform: translate3d(3%, 28%, 0);
  }
  90% {
    transform: translate3d(-10%, 10%, 0);
  }
}

/* coming into focus once the photo has loaded: the picture sharpens and
   the corners close in */
.js .portrait:not(.is-locked) .portrait-plate img {
  opacity: 0.35;
  filter: blur(10px) saturate(0.5) brightness(1.12);
  transform: scale(1.06);
}
.js .portrait:not(.is-locked) .viewfinder {
  opacity: 0;
  transform: scale(1.18);
}

.portrait.is-locked .portrait-plate img {
  transition:
    opacity 600ms ease,
    filter 1150ms var(--glide) 200ms,
    transform 1400ms var(--glide) 100ms;
}
.portrait.is-locked .viewfinder {
  transition:
    opacity 260ms ease,
    transform 900ms var(--spring);
}

/* ---------- research interests: two abilities ---------- */

.interests-lede {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  line-height: 1.6;
  text-wrap: pretty;
}

/* the full column, like everything else below the intro */
.abilities {
  margin: 0;
  padding: 0;
  list-style: none;
}

.abilities > li + li {
  margin-top: 0.7rem;
}

.abilities p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.6;
  text-wrap: pretty;
}

.abilities b {
  font-weight: 600;
}

.interests-close {
  margin: 1rem 0 0;
  font-size: 1rem;
  line-height: 1.6;
  text-wrap: pretty;
}

/* a thought added under an ability */
.abilities .insight {
  margin-top: 0.4rem;
  padding-left: 0.85rem;
  border-left: 2px solid var(--rule);
  font-size: 0.9375rem;
  color: var(--graphite);
}

/* ---------- research: the paper as a card ---------- */

.paper-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr);
  border: 1px solid var(--rule);
  border-radius: 14px;
  overflow: hidden;
  background: var(--paper);
  transition:
    border-color 400ms ease,
    box-shadow 700ms var(--glide);
}
.paper-card:hover {
  border-color: #dadad6;
  box-shadow: 0 24px 46px -32px rgb(25 25 27 / 0.3);
}

/* the overview figure, matted on a light grey plate; multiply lets the
   figure's white ground take the plate's tone */
.paper-plate {
  display: grid;
  place-items: center;
  padding: 1.25rem 1rem;
  background: #f4f4f2;
  border-right: 1px solid var(--rule);
  overflow: hidden;
}

.paper-plate img {
  width: 100%;
  mix-blend-mode: multiply;
  transition: transform 1.6s var(--glide);
}
@media (hover: hover) {
  .paper-card:hover .paper-plate img {
    transform: scale(1.05);
    transition: transform 7s cubic-bezier(0.16, 0.5, 0.3, 1);
  }
}

.paper-card-body {
  display: flex;
  flex-direction: column;
  padding: 1.35rem 1.5rem 1.4rem;
}

.paper-card h3 {
  margin: 0 0 0.45rem;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.1875rem;
  line-height: 1.3;
  letter-spacing: -0.008em;
  text-wrap: balance;
}

.paper-card h3 a {
  text-decoration-color: transparent;
}
.paper-card h3 a:hover {
  text-decoration-color: currentColor;
}

.paper-card .summary {
  margin-top: 0.6rem;
}

.paper-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: auto 0 0;
  padding-top: 1.05rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.36rem 0.75rem 0.36rem 0.85rem;
  border: 1px solid #dadad6;
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 500;
  line-height: 1.2;
  text-decoration: none;
  transition:
    background-color 220ms ease,
    border-color 220ms ease,
    color 220ms ease;
}
.chip:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}
/* live Hugging Face upvotes, shown once the count arrives */
.chip .upvotes {
  margin-left: 0.15rem;
  color: var(--star);
  font-variant-numeric: tabular-nums;
  transition: color 220ms ease;
}
.chip:hover .upvotes {
  color: var(--star-glow);
}
.chip svg {
  width: 0.7rem;
  height: 0.7rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------- projects: a picture, then the words ---------- */

.paper {
  display: grid;
  grid-template-columns: 13rem minmax(0, 1fr);
  gap: 1.85rem;
  align-items: start;
}

.paper-figure {
  display: block;
  margin-top: 0.3rem;
  border: 1px solid var(--rule);
  border-radius: 5px;
  overflow: hidden;
  background: #fff;
}

.paper-figure img {
  width: 100%;
  transition: transform 1.6s var(--glide);
}
@media (hover: hover) {
  .paper:hover .paper-figure img {
    transform: scale(1.06);
    transition: transform 7s cubic-bezier(0.16, 0.5, 0.3, 1);
  }
}

/* amber, like a frame still in the developer */
.paper-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.4rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--graphite);
}
.paper-status::before {
  content: '';
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--edge-print);
}

.paper h3 {
  margin: 0 0 0.4rem;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.25rem;
  line-height: 1.28;
  letter-spacing: -0.008em;
  text-wrap: balance;
}

.paper h3 a {
  text-decoration-color: transparent;
}
.paper h3 a:hover {
  text-decoration-color: currentColor;
}

.authors,
.summary {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--graphite);
}

.authors strong {
  color: var(--ink);
  font-weight: 560;
}

.summary {
  text-wrap: pretty;
}

/* the headline numbers, so a skim still finds them */
.fig {
  color: var(--ink);
  font-weight: 560;
  font-variant-numeric: tabular-nums;
}

.tags {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--quiet);
}

/* links under a paper or project */
.paper-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0 1.15rem;
  margin: 0.5rem 0 0.7rem;
  font-size: 0.9375rem;
  font-weight: 500;
}

/* the project plays on a small dark screen; site.js mounts the live
   portrait once it comes near the viewport */
.project-preview {
  aspect-ratio: 729 / 705;
  margin-top: 0.3rem;
  border-radius: 5px;
  overflow: hidden;
  background: #000;
}

.project-preview ascii-portrait {
  display: block;
  width: 100%;
  min-height: 0;
  pointer-events: none;
}

/* ---------- experience and education: two timelines, side by side ---------- */

.tracks {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 3.25rem;
  margin-top: 3.6rem;
}
.tracks > section {
  margin-top: 0;
}

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

.track > li {
  position: relative;
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  column-gap: 0.95rem;
  align-items: start;
  padding-bottom: 1.15rem;
}

/* the thread from one mark to the next */
.track > li::before {
  content: '';
  position: absolute;
  left: calc(1.25rem - 0.5px);
  top: 2.85rem;
  bottom: 0.3rem;
  width: 1px;
  background: var(--rule);
}
.track > li:last-child {
  padding-bottom: 0;
}
.track > li:last-child::before {
  display: none;
}

/* the school's mark in a small round frame; seals fill it */
.mark {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--rule);
  border-radius: 50%;
  background: var(--paper);
  overflow: hidden;
}
.mark img {
  width: 74%;
  height: 74%;
  object-fit: contain;
}
.mark-fill {
  border: 0;
}
.mark-fill img {
  width: 100%;
  height: 100%;
}
.track-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin: 0;
  padding-top: 0.1rem;
}
.track-name {
  font-weight: 560;
  letter-spacing: -0.004em;
}

.when {
  flex: none;
  color: var(--quiet);
  font-size: 0.8125rem;
  letter-spacing: 0.005em;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.track .with,
.track .degree,
.track .topic {
  margin: 0.05rem 0 0;
  text-wrap: pretty;
}
.track .with {
  font-size: 1rem;
}
.track .degree,
.track .topic {
  color: var(--graphite);
}

/* ---------- photography: a contact sheet ---------- */

.photography {
  margin-top: 5rem;
}

.photography-head h2 {
  margin-bottom: 0.7rem;
}

.photography-head p {
  margin: 0;
  max-width: 34rem;
  color: var(--graphite);
}

/* strips of film, each frame cut to its photograph's own proportions.
   Without script this is a plain justified wrap; site.js then splits the
   frames into strips of even height that all run the full width, and
   lines the perforations up so each strip reads as one piece of film. */
.contact-sheet {
  display: flex;
  flex-wrap: wrap;
  row-gap: 1.6rem;
  max-width: calc(var(--wide) + 2 * var(--gutter));
  margin: 2.5rem auto 0;
  padding: 0 var(--gutter);
  list-style: none;
}

.frame {
  --ar: 3 / 2;
  --pitch: 1.5rem; /* perforation spacing along the strip */
  position: relative;
  flex: calc(var(--ar)) 1 calc(var(--ar) * 9rem + 0.6rem);
  min-width: 0;
  padding: 1.2rem 0.3rem 1.45rem;
  background: var(--film);
}

.frame::before,
.frame::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 7px;
  /* a perforation is a rounded rectangle a little wider than tall */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 7' preserveAspectRatio='xMidYMid meet'%3E%3Crect width='10' height='7' rx='1.7' fill='%23ffffff'/%3E%3C/svg%3E");
  background-size: var(--pitch) 7px;
  background-position-x: var(--perf-x, 0px);
  background-repeat: repeat-x;
}
.frame::before {
  top: 0.38rem;
}
.frame::after {
  bottom: 0.38rem;
}

.frame-window {
  display: block;
  width: 100%;
  aspect-ratio: var(--ar);
  padding: 0;
  border: 0;
  background: var(--gate);
  cursor: zoom-in;
  overflow: hidden;
}

.frame-window img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: none;
  transition:
    transform 1.6s var(--glide),
    filter 600ms ease;
}

/* held under the cursor, the picture drifts in slowly, each frame
   its own way (site.js sets --dx / --dy) */
@media (hover: hover) {
  .frame-window:hover img {
    transform: scale(1.08) translate3d(var(--dx, 0%), var(--dy, 0%), 0);
    filter: brightness(1.06);
    transition:
      transform 9s cubic-bezier(0.16, 0.5, 0.3, 1),
      filter 600ms ease;
  }
}

.frame-window:focus-visible {
  outline: 2px solid var(--edge-print);
  outline-offset: -2px;
  border-radius: 0;
}

.edge {
  position: absolute;
  left: 0.55rem;
  bottom: 0.82rem;
  color: var(--edge-print);
  font-size: 0.56rem;
  line-height: 1;
  letter-spacing: 0.14em;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}
.edge::before {
  content: '\25B8';
  margin-right: 0.25em;
}

/* ---------- albums: the main site's crate of records ---------- */

/* Same staging as on yuchenlu.me: the sleeves stand in a stack, each over
   the next; under the cursor one is drawn down out of the stack, the
   record slides out of the sleeve and starts to turn, and the cover
   throws a soft reflection on the shelf. */
.albums {
  margin-top: 5rem;
}

.albums-head h2 {
  margin: 0;
}

.crate {
  position: relative;
  display: flex;
  max-width: calc(var(--wide) + 2 * var(--gutter));
  margin: 2.75rem auto 0;
  /* room below for a record drawn down out of the stack */
  padding: 0 var(--gutter) 9rem;
  list-style: none;
}

/* each sleeve steps 60% of its width from the last; the width is solved
   so the last record, slid out, still ends inside the row */
.lp {
  --n: 8;
  --w: calc(96% / (1.564 + 0.6 * (var(--n) - 1)));
  position: relative;
  z-index: var(--z);
  flex: none;
  width: var(--w);
  margin-left: calc(var(--w) * -0.4);
}
.lp:first-child {
  margin-left: 0;
}

.lp-pull {
  transition: transform 600ms cubic-bezier(0.215, 0.61, 0.355, 1);
}

.lp-body {
  position: relative;
}

.lp-disc {
  position: absolute;
  top: 3%;
  bottom: 3%;
  right: 0;
  aspect-ratio: 1;
  pointer-events: none;
  transition: transform 700ms cubic-bezier(0.215, 0.61, 0.355, 1);
}

/* the turning part: grooves, label and spindle hole */
.lp-spin {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background:
    repeating-radial-gradient(circle at 50% 50%, rgb(255 255 255 / 0.085) 0 1px, transparent 1px 14px),
    repeating-radial-gradient(circle at 50% 50%, rgb(255 255 255 / 0.05) 0 1px, transparent 1px 3px),
    radial-gradient(circle at 50% 50%, #121212 0%, #121212 56%, #080808 93%, #080808 100%);
  animation: vinyl-spin 7s linear infinite paused;
}

.lp-label-ground,
.lp-label,
.lp-hole {
  position: absolute;
  left: 50%;
  top: 50%;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}
.lp-label-ground {
  width: 47%;
  height: 47%;
  background: #1a1a1a;
}
.lp-label {
  width: 40%;
  height: 40%;
  object-fit: cover;
}
.lp-hole {
  width: 3.6%;
  height: 3.6%;
  background: var(--paper);
}

/* the highlight comes from the room, so it stays put while the record turns */
.lp-sheen {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: linear-gradient(
    115deg,
    transparent 34%,
    rgb(255 255 255 / 0.11) 44%,
    rgb(255 255 255 / 0.02) 51%,
    transparent 58%
  );
  box-shadow: inset 0 0 0 1px rgb(255 255 255 / 0.09);
}

@keyframes vinyl-spin {
  to {
    transform: rotate(1turn);
  }
}

/* the cover's reflection on the shelf: blurred, fading downward */
.lp-reflect {
  position: absolute;
  left: -16px;
  right: -16px;
  top: 100%;
  height: 52%;
  overflow: hidden;
  pointer-events: none;
  opacity: 0;
  transition: opacity 500ms ease;
  -webkit-mask-image: linear-gradient(to bottom, rgb(0 0 0 / 0.9) 0%, rgb(0 0 0 / 0.62) 22%, rgb(0 0 0 / 0.34) 44%, rgb(0 0 0 / 0.15) 64%, rgb(0 0 0 / 0.05) 80%, transparent 96%);
  mask-image: linear-gradient(to bottom, rgb(0 0 0 / 0.9) 0%, rgb(0 0 0 / 0.62) 22%, rgb(0 0 0 / 0.34) 44%, rgb(0 0 0 / 0.15) 64%, rgb(0 0 0 / 0.05) 80%, transparent 96%);
}
.lp-reflect img {
  position: absolute;
  left: 16px;
  top: 0;
  width: calc(100% - 32px);
  transform: scaleY(-1);
  opacity: 0.27;
  filter: blur(6px);
}

/* the sleeve; its shadow falls on the one behind, so each reads as its own */
.lp-sleeve {
  position: relative;
  display: block;
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: 2px;
  box-shadow: 12px 0 24px -8px rgb(0 0 0 / 0.42);
}
.lp-sleeve img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.lp-caption {
  margin: 5.5rem 0 0;
  opacity: 0;
  transition: opacity 300ms ease;
}
.lp-title {
  display: block;
  font-family: var(--serif);
  font-size: 0.9375rem;
  line-height: 1.3;
}
.lp-meta {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.75rem;
  color: var(--star);
}

@media (hover: hover) and (min-width: 641px) {
  .lp:hover .lp-pull {
    transform: translateY(40%);
  }
  .lp:hover .lp-disc {
    transform: translateX(60%);
  }
  .lp:hover .lp-spin {
    animation-play-state: running;
  }
  .lp:hover .lp-reflect,
  .lp:hover .lp-caption {
    opacity: 1;
  }
}

/* where you are on the phone's shelf */
.crate-count {
  display: none;
  align-items: center;
  gap: 1rem;
  margin-top: 1.1rem;
  padding: 0 var(--gutter);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  color: var(--quiet);
  font-variant-numeric: tabular-nums;
}
.crate-index b {
  font-weight: 500;
  color: var(--star);
}
.crate-track {
  position: relative;
  width: 6rem;
  height: 1px;
  overflow: hidden;
  background: rgb(0 0 0 / 0.12);
}
.crate-track span {
  position: absolute;
  inset: 0 auto 0 0;
  width: calc(100% / 8);
  background: var(--star);
  transition: transform 500ms cubic-bezier(0.215, 0.61, 0.355, 1);
}

/* ---------- footer ---------- */

.colophon {
  margin-top: 3.5rem;
  padding-bottom: 3.5rem;
  color: var(--quiet);
  font-size: 0.875rem;
}

.colophon p {
  margin: 0 0 0.3rem;
}

.glow-link {
  color: var(--star);
  text-decoration: none;
  text-shadow: 0 0 12px hsl(45 95% 60% / 0.5);
}
.glow-link:hover {
  text-decoration: underline;
  text-decoration-color: currentColor;
}

/* ---------- the screening room ---------- */

.screening {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  background: #060606;
  touch-action: none;
}

.screening[hidden] {
  display: none;
}

/* faint film grain on the dark, so the room reads as projected light */
.screening::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.screening-frame {
  position: relative;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.screening-frame img {
  width: auto;
  height: auto;
  max-width: min(90vw, 1400px);
  max-height: 80vh;
  max-height: 80svh;
  box-shadow: 0 30px 80px rgb(0 0 0 / 0.6);
  will-change: transform, opacity;
}

.screening-count {
  margin-top: 1.1rem;
  color: var(--edge-print);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  font-variant-numeric: tabular-nums;
}

.screening button {
  position: absolute;
  border: 0;
  background: none;
  color: #e9e9e6;
  cursor: pointer;
  font: inherit;
}

.screening-close {
  top: 1.1rem;
  right: 1.25rem;
  padding: 0.5rem 0.6rem;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  opacity: 0.8;
}
.screening-close:hover {
  opacity: 1;
}

.screening-nav {
  top: 50%;
  width: 3.25rem;
  height: 3.25rem;
  margin-top: -1.625rem;
  display: grid;
  place-items: center;
  opacity: 0.7;
}
.screening-nav:hover {
  opacity: 1;
}
.screening-nav svg {
  width: 1.5rem;
  height: 1.5rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.screening-prev {
  left: 0.75rem;
}
.screening-next {
  right: 0.75rem;
}

.screening :focus-visible {
  outline-color: var(--edge-print);
}

/* ---------- smaller screens ---------- */

@media (max-width: 640px) {
  :root {
    --gutter: 1.25rem;
  }

  main {
    padding-top: 3.25rem;
  }

  .intro {
    grid-template-columns: 1fr;
    gap: 2.4rem;
  }

  .portrait {
    order: -1;
    width: 6.5rem;
    margin: 0.5rem 0 0 7px;
    justify-self: start;
  }

  .links {
    gap: 0.3rem 1.1rem;
  }

  section {
    margin-top: 3.25rem;
  }

  .paper {
    grid-template-columns: 1fr;
    gap: 1.1rem;
  }

  .paper-card {
    grid-template-columns: 1fr;
  }

  .paper-plate {
    padding: 1.1rem 1.25rem;
    border-right: 0;
    border-bottom: 1px solid var(--rule);
  }

  .paper-card-body {
    padding: 1.15rem 1.2rem 1.25rem;
  }

  .project-preview {
    width: min(100%, 15rem);
  }


  /* the date drops under the name rather than squeezing it */
  .track-head {
    flex-direction: column;
    gap: 0;
  }

  .tracks {
    grid-template-columns: 1fr;
    row-gap: 3.25rem;
    margin-top: 3.25rem;
  }

  /* on a phone the crate becomes a shelf you swipe along: the record in
     position is drawn out and turns, its neighbours wait beside it */
  .crate {
    gap: 0.75rem;
    margin-top: 2rem;
    padding: 0.5rem 0 0.5rem var(--gutter);
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scroll-snap-type: x mandatory;
    scroll-padding-left: var(--gutter);
    scrollbar-width: none;
    -webkit-tap-highlight-color: transparent;
  }
  .crate::-webkit-scrollbar {
    display: none;
  }
  /* lets the last record come to rest at the left margin too */
  .crate::after {
    content: '';
    flex: none;
    width: calc(20vw - var(--gutter) - 0.75rem);
  }
  .lp {
    z-index: auto;
    width: 80vw;
    margin-left: 0;
    scroll-snap-align: start;
  }
  .lp-body {
    width: 64%;
  }
  .lp-reflect {
    display: none;
  }
  .lp-sleeve {
    box-shadow: 12px 0 24px -8px rgb(0 0 0 / 0.3);
  }
  .lp-caption {
    margin-top: 1.1rem;
    padding-right: 0.75rem;
    opacity: 0.3;
    transition: opacity 500ms cubic-bezier(0.215, 0.61, 0.355, 1);
  }
  .lp-title {
    font-size: 1.1875rem;
  }
  .lp.is-lit .lp-disc {
    transform: translateX(55%);
  }
  .lp.is-lit .lp-spin {
    animation-play-state: running;
  }
  .lp.is-lit .lp-caption {
    opacity: 1;
  }
  .crate-count {
    display: flex;
  }

  .albums {
    margin-top: 5rem;
  }

  .screening-nav {
    top: auto;
    bottom: 1rem;
    margin-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .rec,
  .portrait-plate,
  .grain {
    animation: none;
  }
  .js .portrait .portrait-plate img,
  .js .portrait .viewfinder {
    opacity: 1;
    filter: none;
    transform: none;
    transition: none;
  }
  a,
  .links a,
  .links a::after,
  .frame-window img,
  .paper-figure img,
  .paper-plate img,
  .lp-pull,
  .lp-disc,
  .lp-reflect,
  .lp-caption,
  .crate-track span {
    transition: none;
  }
  .lp-spin,
  .js .hand-line,
  .js .hand-head,
  .js .hand-text {
    animation: none;
    stroke-dashoffset: 0;
    opacity: 1;
  }
  .lp:hover .lp-pull,
  .lp:hover .lp-disc {
    transform: none;
  }
  .frame-window:hover img {
    transform: none;
  }
}