/* Photography site: white by default, dark at night or on request. Editorial layout, slow and quiet motion. */

@font-face {
  font-family: "Instrument Serif";
  src: url("../fonts/instrument-serif-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Instrument Serif";
  src: url("../fonts/instrument-serif-400-italic.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

:root {
  --bg: #ffffff;
  --fg: #141414;
  --muted: #8d8d8a;
  --line: #e8e7e3;
  --pad: 48px;
  --max: 1560px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --serif: "Instrument Serif", "Songti SC", "STSong", "Noto Serif SC", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #0f0f0f;
  --fg: #ececea;
  --muted: #8a8a87;
  --line: #262625;
  color-scheme: dark;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.5s var(--ease), color 0.5s var(--ease);
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
img { -webkit-user-drag: none; -webkit-touch-callout: none; user-select: none; }

/* Small uppercase labels used across the site */
.brand__tag,
.home-link,
.theme-toggle,
.switch button,
.back-link,
.tile__date,
.work-head__meta,
.plate__detail,
.work-nav__label {
  font: 500 11px/1 var(--sans);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

/* Header */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 30px var(--pad);
}

.brand { display: flex; align-items: baseline; gap: 14px; white-space: nowrap; }
.brand__name { font: 400 27px/1 var(--serif); letter-spacing: 0.005em; }
.brand__tag { color: var(--muted); }

.site-header__actions { display: flex; align-items: center; gap: 28px; }

.home-link { color: var(--muted); white-space: nowrap; transition: color 0.3s; }
.home-link:hover { color: var(--fg); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  border: 0;
  background: none;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.3s;
}
.theme-toggle:hover { color: var(--fg); }
.theme-toggle[hidden] { display: none; }
.theme-toggle svg { display: none; width: 14px; height: 14px; }
.theme-toggle[data-mode="auto"] .icon-auto,
.theme-toggle[data-mode="light"] .icon-light,
.theme-toggle[data-mode="dark"] .icon-dark { display: block; }

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
}

/* Home: order and size switches */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 6px 0 0;
}
.toolbar[hidden] { display: none; }

.switch { display: flex; align-items: center; gap: 26px; }

.switch button {
  position: relative;
  padding: 8px 0;
  border: 0;
  background: none;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.3s;
}
.switch button::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--ease);
}
.switch button:hover { color: var(--fg); }
.switch button[aria-pressed="true"] { color: var(--fg); }
.switch button[aria-pressed="true"]::after { transform: scaleX(1); }

.switch--icons { gap: 14px; }
.switch--icons button::after { display: none; }
.switch--icons svg { display: block; width: 15px; height: 15px; fill: currentColor; }

/* Cover photo: the first selected work */
.feature { display: block; margin-top: 36px; }

.feature__frame,
.plate__link {
  display: block;
  width: min(100%, calc(76svh * var(--ar)));
  aspect-ratio: var(--ar);
  margin: 0 auto;
  overflow: hidden;
  background: var(--ph, var(--line));
}

.feature__frame img,
.plate__link img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.6s var(--ease), opacity 1s var(--ease);
}
.feature:hover img { transform: scale(1.015); }
.feature .tile__caption { width: min(100%, calc(76svh * var(--ar))); margin: 18px auto 0; }

/* Section titles */
.section-title {
  margin: 128px 0 40px;
  font: 400 clamp(32px, 3.4vw, 48px)/1.05 var(--serif);
  letter-spacing: -0.005em;
}
.section-title sup {
  position: relative;
  top: -0.9em;
  margin-left: 10px;
  font: 500 11px/1 var(--sans);
  letter-spacing: 0.12em;
  color: var(--muted);
}
.view > .section-title:first-child { margin-top: 56px; }

/* Masonry columns: tiles go into the shortest column (home.js); a plain grid without JavaScript. */
.masonry {
  --cols: 2;
  --gx: 56px;
  --gy: 88px;
  display: grid;
  grid-template-columns: repeat(var(--cols), minmax(0, 1fr));
  gap: var(--gy) var(--gx);
  align-items: start;
}
.masonry.is-laid { display: flex; align-items: flex-start; gap: var(--gx); }
.masonry__col { display: flex; flex: 1 1 0; flex-direction: column; gap: var(--gy); min-width: 0; }

.tile { display: block; }
.tile--dup { display: none; }

.tile__frame { display: block; overflow: hidden; background: var(--ph, var(--line)); }
.tile__frame img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform 1.4s var(--ease), opacity 1s var(--ease);
}
.tile:hover .tile__frame img { transform: scale(1.03); }

.tile__caption { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-top: 16px; }
.tile__title {
  font: 400 20px/1.25 var(--serif);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition: text-decoration-color 0.4s;
}
.tile:hover .tile__title,
.feature:hover .tile__title { text-decoration-color: currentColor; }
.tile__date { flex: none; color: var(--muted); }

/* Small photos: more at once, no captions */
main[data-size="small"] .masonry { --cols: 4; --gx: 16px; --gy: 16px; }
main[data-size="small"] .tile__caption { display: none; }
main[data-size="small"] .tile--dup { display: block; }
main[data-size="small"] .feature { display: none; }
main[data-size="small"] .feature + .section-title { margin-top: 56px; }
main[data-size="small"] .tile:hover .tile__frame img { transform: scale(1.02); }

/* Work page: one work (a single photo or a series), shown like an exhibition */
.back-link { display: inline-block; color: var(--muted); transition: color 0.3s; }
.back-link:hover { color: var(--fg); }

.work-head { padding: 5svh 0 5svh; text-align: center; }
.work-head h1 { margin: 0; font: 400 clamp(40px, 5.2vw, 76px)/1 var(--serif); letter-spacing: -0.01em; }
.work-head__meta { margin: 26px 0 0; color: var(--muted); }
.work-head__note { max-width: 560px; margin: 28px auto 0; font: italic 400 22px/1.5 var(--serif); }

html.snap { scroll-snap-type: y proximity; }

.plate {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100svh;
  margin: 0;
  padding: 6svh 0;
  scroll-snap-align: center;
}
/* The first photo sits right under the title, so title and photo share the first screen. */
.plate:first-child { min-height: 0; padding-top: 0; }
.plate:first-child .plate__link { width: min(100%, calc(64svh * var(--ar))); }
.plate__link { cursor: zoom-in; }
.plate__link:hover img { transform: scale(1.01); }

.plate__label { max-width: 640px; margin-top: 24px; text-align: center; }
.plate__label p { margin: 0; }
.plate__caption { font: italic 400 21px/1.45 var(--serif); }
.plate__caption + p { margin-top: 12px; }
.plate__detail { color: var(--muted); }
.plate__label .plate__exif { margin-top: 8px; font-size: 12px; letter-spacing: 0.02em; color: var(--muted); }

.counter {
  position: fixed;
  right: var(--pad);
  bottom: 30px;
  z-index: 5;
  font: 400 17px/1 var(--serif);
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.counter__now { color: var(--fg); }

.work-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-top: 12svh;
  padding-top: 40px;
  border-top: 1px solid var(--line);
}
.work-nav a { display: block; }
.work-nav__next { text-align: right; }
.work-nav__label { color: var(--muted); }
.work-nav__title {
  display: block;
  margin-top: 14px;
  font: 400 clamp(26px, 2.6vw, 36px)/1.1 var(--serif);
  transition: opacity 0.3s;
}
.work-nav__thumb {
  display: block;
  width: min(100%, 300px);
  aspect-ratio: var(--ar);
  margin-top: 22px;
  overflow: hidden;
  background: var(--ph, var(--line));
}
.work-nav__next .work-nav__thumb { margin-left: auto; }
.work-nav__thumb img { display: block; width: 100%; height: 100%; object-fit: cover; transition: transform 1.4s var(--ease), opacity 1s var(--ease); }
.work-nav a:hover .work-nav__thumb img { transform: scale(1.04); }

/* Footer: copyright and contact */
.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 160px var(--pad) 48px;
}

.site-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: 24px 48px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.8;
  color: var(--muted);
}
.site-footer__name { margin: 0; font: 400 20px/1.3 var(--serif); color: var(--fg); }
.site-footer__text p { max-width: 640px; margin: 0 0 10px; }
.site-footer a { text-decoration: underline; text-underline-offset: 3px; transition: color 0.3s; }
.site-footer a:hover { color: var(--fg); }

/* Lightbox follows the theme: white by day, black at night */
.pswp {
  --pswp-bg: var(--bg);
  --pswp-placeholder-bg: var(--line);
  --pswp-icon-color: var(--fg);
  --pswp-icon-color-secondary: var(--bg);
  --pswp-icon-stroke-color: var(--bg);
  --pswp-icon-stroke-width: 0;
}
.pswp__counter { font: 400 16px/1 var(--serif); color: var(--muted); text-shadow: none; opacity: 1; }
.pswp__button { opacity: 0.6; transition: opacity 0.3s; }
.pswp__button:hover { opacity: 1; }

/* Motion: blocks rise in as they scroll into view; photos fade in once loaded (motion.js) */
.js .reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 1.1s var(--ease) var(--delay, 0ms), transform 1.4s var(--ease) var(--delay, 0ms);
}
.js .reveal.is-in { opacity: 1; transform: none; }
.js img.fade { opacity: 0; }
.js img.fade.is-loaded { opacity: 1; }
.no-motion .reveal,
.no-motion img.fade { opacity: 1 !important; transform: none !important; }

/* Page changes: the clicked photo flies into place on the work page (browsers with view transitions) */
@view-transition { navigation: auto; }
::view-transition-group(photo) { animation-duration: 0.8s; animation-timing-function: var(--ease); }
::view-transition-old(root),
::view-transition-new(root) { animation-duration: 0.5s; }

@media (prefers-reduced-motion: reduce) {
  @view-transition { navigation: none; }
  .js .reveal,
  .js img.fade { opacity: 1; transform: none; transition: none; }
  html.snap { scroll-snap-type: none; }
}

@media (max-width: 1100px) {
  :root { --pad: 32px; }
  .masonry { --gx: 40px; --gy: 68px; }
  main[data-size="small"] .masonry { --cols: 3; }
}

@media (max-width: 700px) {
  :root { --pad: 18px; }
  .site-header { padding-top: 20px; padding-bottom: 20px; }
  .brand__name { font-size: 23px; }
  .brand__tag { display: none; }
  .site-header__actions { gap: 18px; }
  .masonry { --cols: 1; --gy: 52px; }
  main[data-size="small"] .masonry { --cols: 2; --gx: 8px; --gy: 8px; }
  .section-title { margin-top: 88px; }
  .feature__frame,
  .plate__link { width: min(100%, calc(70svh * var(--ar))); }
  .plate { min-height: 0; padding: 7svh 0; }
  .work-head { padding-top: 7svh; }
  .work-nav { grid-template-columns: 1fr; gap: 40px; }
  .work-nav__next { text-align: left; }
  .work-nav__next .work-nav__thumb { margin-left: 0; }
  .counter { display: none; }
  .site-footer { padding-top: 110px; }
  .site-footer__inner { grid-template-columns: 1fr; }
}