:root {
  --bg: #e9e8df;
  --surface: #f8f7f1;
  --paper: #fffefa;
  --ink: #182c29;
  --muted: #586861;
  --accent: #28776d;
  --line: #c7d0c8;
  --dark: #183a34;
  --dark-ink: #f4f4e9;
  --gallery: #192c29;
  --font-serif: 'Newsreader', Georgia, serif;
  --font-sans: 'DM Sans', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: #101c1a;
    --surface: #162723;
    --paper: #1b2d28;
    --ink: #edf1e8;
    --muted: #b3c2b8;
    --accent: #8ed1c0;
    --line: #365148;
    --dark: #0c1815;
    --gallery: #0d1715;
  }
}

html[data-theme='dark'] {
  --bg: #101c1a;
  --surface: #162723;
  --paper: #1b2d28;
  --ink: #edf1e8;
  --muted: #b3c2b8;
  --accent: #8ed1c0;
  --line: #365148;
  --dark: #0c1815;
  --gallery: #0d1715;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--font-sans); line-height: 1.6; }
img { max-width: 100%; display: block; }
button { font: inherit; }
a { color: inherit; }
::selection { background: var(--accent); color: var(--surface); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.shell { width: min(calc(100% - 64px), 1460px); margin-inline: auto; }
.skip-link { position: absolute; left: 12px; top: -100px; z-index: 100; padding: 10px 16px; background: var(--ink); color: var(--bg); }
.skip-link:focus { top: 10px; }
.version-note { border-bottom: 1px solid var(--line); font: 400 .68rem/1.4 var(--font-mono); }
.version-note .shell { padding-block: 10px; text-align: right; }
.version-note a { color: var(--accent); text-decoration: none; }
.version-note a:hover { text-decoration: underline; }

body.page-home { min-height: 100vh; display: flex; flex-direction: column; }
body.page-home .home-main { flex: 1; }
body.page-home .site-footer { margin-top: auto; }

.site-header { display: flex; align-items: center; gap: 32px; min-height: 102px; border-bottom: 1px solid var(--line); }
.site-brand { display: flex; align-items: center; gap: 12px; text-decoration: none; flex-shrink: 0; }
.brand-initials { display: inline-flex; align-items: center; gap: 9px; font: 500 2.2rem/1 var(--font-serif); letter-spacing: -.09em; }
.brand-icon { display: block; width: 21px; height: 21px; flex: none; color: var(--accent); }
.brand-icon svg { display: block; width: 100%; height: 100%; fill: currentColor; }
.brand-text { display: block; font: 700 .78rem/1.25 var(--font-sans); letter-spacing: .04em; }
.brand-text small { display: block; margin-top: 4px; font: 400 .57rem/1.4 var(--font-mono); letter-spacing: .04em; color: var(--muted); }
.site-nav { display: flex; align-items: center; gap: clamp(16px, 2.8vw, 40px); margin-left: auto; }
.site-nav a { position: relative; font: 500 .69rem/1.2 var(--font-mono); letter-spacing: .04em; text-decoration: none; padding-block: 10px; }
.site-nav a::after { content: ''; position: absolute; left: 0; right: 0; bottom: 4px; height: 2px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform .2s; }
.site-nav a:hover::after, .site-nav a[aria-current='page']::after { transform: scaleX(1); }
.theme-toggle { border: 1px solid var(--line); background: transparent; color: var(--ink); padding: 8px 10px; cursor: pointer; font: 500 .65rem/1.2 var(--font-mono); white-space: nowrap; }
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

.kicker, .observation-label, .label { display: block; font: 500 .65rem/1.6 var(--font-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--accent); }
h1, h2, p { margin-top: 0; }
h1, h2 { font-family: var(--font-serif); font-weight: 400; letter-spacing: -.04em; }
h1 { font-size: clamp(4.3rem, 7.2vw, 8.5rem); line-height: .98; margin-bottom: 30px; }
h1 i { font-weight: 300; }
h1 span[style] { color: var(--accent) !important; }

.home-main { padding-block: 78px 115px; }
.home-hero { display: grid; grid-template-columns: minmax(0, 1.48fr) minmax(300px, .68fr); gap: clamp(40px, 6vw, 105px); align-items: stretch; }
.home-intro { padding-block: 22px; }
.home-intro h1 { margin: 20px 0 32px; max-width: 920px; }
.home-intro > p { font: 400 clamp(1.3rem, 1.7vw, 1.7rem)/1.47 var(--font-serif); max-width: 760px !important; margin: 0 !important; color: var(--muted); }
.home-intro .btn { margin-top: 2.25rem; }
.home-aside { display: flex; align-items: center; background: var(--dark); color: var(--dark-ink); padding: clamp(30px, 4vw, 65px); border-top: 6px solid #7dc0b0; }
.home-aside .sidebar-note { display: flex; flex-direction: column; gap: 1.25rem; margin: 0; }
.home-aside .observation-label { margin-bottom: .5rem; color: #9bd6c6; }
.home-aside p { font: 400 clamp(1.4rem, 2vw, 2.15rem)/1.35 var(--font-serif); margin: 0; }
.home-aside p span { color: #b8d6c9; font-style: italic; }

.page-intro { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(330px, .85fr); gap: 7%; align-items: end; padding-block: 75px 65px; border-bottom: 1px solid var(--line); }
.page-intro h1 { margin: 18px 0 0; font-size: clamp(4.3rem, 6.8vw, 7.7rem); }
.page-intro > p, .gallery-intro-layout > div:last-child > p { font: 400 clamp(1.35rem, 1.8vw, 1.8rem)/1.45 var(--font-serif); color: var(--muted); max-width: none !important; margin: 0 0 6px !important; }
.research-overview { padding: 22px 0; border-bottom: 1px solid var(--line); }
.research-overview .sidebar-note { display: grid; grid-template-columns: 210px 1fr; gap: 32px; margin: 0; }
.research-overview .observation-label { padding-top: 5px; }
.interest-list { display: flex; flex-wrap: wrap; align-items: center; gap: 7px 0; padding: 0; margin: 0; list-style: none; color: var(--muted); font: 500 .75rem/1.6 var(--font-sans); }
.interest-list li { white-space: nowrap; }
.interest-list li:not(:last-child)::after { content: "·"; display: inline-block; margin-inline: 10px; color: var(--accent); }
.research-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; padding-block: 42px 110px; }
.research-entry { min-width: 0; background: var(--paper); border: 1px solid var(--line); border-top: 4px solid var(--accent); padding: clamp(27px, 3.1vw, 50px); }
.research-entry h2 { font-size: clamp(2.35rem, 3.4vw, 4.35rem); line-height: 1.06; margin: 17px 0 24px; }
.research-entry > p { font-size: .95rem; line-height: 1.78; color: var(--muted); margin-bottom: 1.2rem; }
.research-entry .label { margin: -6px 0 23px; }
.project-note { border-top: 1px solid var(--line); padding-top: 17px; margin-top: 28px; font: 400 .72rem/1.7 var(--font-mono) !important; color: var(--muted); }
.btn { display: inline-block; padding: 11px 14px; border: 1px solid var(--accent); color: var(--accent); font: 500 .68rem/1.2 var(--font-mono); letter-spacing: .05em; text-decoration: none; transition: background .2s, color .2s; }
.btn:hover { background: var(--accent); color: var(--paper); }
.research-entry .btn { margin-top: 12px; }
.research-wide { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: clamp(36px, 6vw, 100px); align-content: start; }
.research-wide > .observation-label, .research-wide > h2, .research-wide > .data-box, .research-wide > .project-note, .research-wide > .publication-detail { grid-column: 1 / -1; }
.research-wide h2 { max-width: 1080px; }
.research-wide > p:not(.project-note) { margin-bottom: 24px; }
.data-box { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; margin: 18px 0 0; background: var(--line); border: 1px solid var(--line); }
.data-row { display: flex; flex-direction: column; gap: 10px; min-width: 0; background: var(--surface); padding: 20px; font: 400 .8rem/1.5 var(--font-sans); }
.data-key { font: 500 .62rem/1.4 var(--font-mono); letter-spacing: .08em; color: var(--accent); }
.publication-detail { border-top: 1px solid var(--line); padding-top: 18px; margin-top: 12px; color: var(--muted); font-size: .86rem; }
.publication-detail summary { cursor: pointer; color: var(--ink); font-weight: 600; }
.publication-detail p { margin: 16px 0 0; max-width: 900px; }

.gallery-intro-layout { grid-template-columns: minmax(0, 1.2fr) minmax(330px, .8fr); }
.gallery-intro-layout .sidebar-note { margin: 29px 0 0; padding-top: 21px; border-top: 1px solid var(--line); }
.gallery-intro-layout .sidebar-note p { font: 400 .92rem/1.7 var(--font-sans); color: var(--muted); margin: 8px 0; }
.gallery-intro-layout .sidebar-note a { color: var(--accent); font: 600 .78rem/1.3 var(--font-sans); text-decoration: none; }
.gallery-intro-layout .sidebar-note a:hover { text-decoration: underline; }
.photo-gallery { margin: 48px 0 110px; padding: 26px; background: var(--gallery); }
.photo-wall { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 28px 17px; }
.photo-artifact { grid-column: span 4; min-width: 0; margin: 0; }
.photo-artifact:first-child, .photo-artifact:nth-child(6), .photo-artifact:nth-child(9) { grid-column: span 8; }
.photo-open { display: block; width: 100%; padding: 0; border: 0; background: none; cursor: zoom-in; overflow: hidden; }
.photo-open img { width: 100%; height: clamp(300px, 30vw, 430px); object-fit: cover; transition: transform .3s, filter .3s; }
.photo-open:hover img { transform: scale(1.025); filter: saturate(1.08); }
.photo-artifact figcaption { display: flex; justify-content: space-between; align-items: baseline; gap: 15px; padding: 12px 0 0; color: #f0f3e9; }
.photo-artifact figcaption span { font: 500 .68rem/1.4 var(--font-mono); letter-spacing: .045em; overflow-wrap: anywhere; }
.photo-artifact figcaption small { font: 400 .64rem/1.4 var(--font-sans); color: #adcbc0; text-align: right; }

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  border-top: 1px solid var(--line);
  padding-block: 26px 40px;
  font: 400 .65rem/1.4 var(--font-mono);
  color: var(--muted);
}

.profile-links {
  display: flex;
  align-items: center;
  gap: 18px;
}

.profile-links > a {
  display: inline-flex;
  align-items: center;
  color: var(--muted);
  text-decoration: none;
  transition: color .2s;
}

.profile-links > a:hover,
.profile-links > a:focus-visible {
  color: var(--accent);
}

.footer-easter-egg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.15rem;
  height: 1.15rem;
  margin-left: 1px;

  color: var(--muted);
  text-decoration: none;
  opacity: .7;

  transition:
    color .2s,
    opacity .2s,
    transform .2s;
}

.game-icon {
  display: block;
  width: 14px;
  height: 14px;

  background-color: currentColor;

  -webkit-mask: url("icon/gamepad.svg") center / contain no-repeat;
  mask: url("icon/gamepad.svg") center / contain no-repeat;
}

.footer-easter-egg:hover,
.footer-easter-egg:focus-visible {
  color: var(--accent);
  opacity: 1;
  transform: translateY(-1px);
}
.profile-links { display: flex; flex-wrap: wrap; align-items: center; gap: 20px; }
.profile-links a { color: var(--accent); text-decoration: none; }
.profile-links a:hover { text-decoration: underline; }

.photo-lightbox { position: fixed; inset: 0; z-index: 10; display: flex; align-items: center; justify-content: center; background: #08100feb; color: white; padding: 60px; opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .2s, visibility .2s; }
.photo-lightbox.is-open { opacity: 1; visibility: visible; pointer-events: auto; }
.lightbox-content { display: flex; flex-direction: column; align-items: center; max-width: 90vw; max-height: 90vh; }
.lightbox-content img { display: block; width: auto; height: auto; max-width: 100%; max-height: 78vh; object-fit: contain; }
.lightbox-caption { margin-top: 14px; text-align: center; font: 500 .75rem/1.5 var(--font-mono); }
.lightbox-caption span, .lightbox-caption small { display: block; }
.lightbox-caption small { color: #bbd2c8; font-size: .65rem; margin-top: 4px; }
.lightbox-close, .lightbox-nav { position: absolute; border: 0; background: none; color: #fff; cursor: pointer; }
.lightbox-close { top: 13px; right: 24px; font-size: 2.5rem; }
.lightbox-nav { top: 50%; transform: translateY(-50%); font-size: 2rem; }
.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }
.lightbox-close:hover, .lightbox-nav:hover { color: #9bd6c6; }

.github-activity { margin-top: 4rem; padding: 2.5rem 0 0; border-top: 1px solid var(--line); }
.github-activity-header { display: flex; align-items: flex-end; justify-content: space-between; gap: 2rem; margin-bottom: 3rem; }
.github-activity h2 { margin: 0.3rem 0 0; font-family: var(--font-serif); font-size: clamp(2rem, 3vw, 3rem); font-weight: 400; line-height: 1; letter-spacing: -0.04em; color: var(--ink); }
.github-activity-link { display: inline-flex; align-items: center; justify-content: center; padding: 0.7rem 0.95rem; border: 1px solid var(--accent); font: 500 0.65rem/1 var(--font-mono); letter-spacing: 0.09em; color: var(--accent); text-decoration: none; white-space: nowrap; transition: background-color 0.2s, color 0.2s; }
.github-activity-link:hover, .github-activity-link:focus-visible { background: var(--accent); color: var(--bg); }
.github-calendar { width: 100%; margin: 0; font-family: var(--font-mono); color: var(--ink); }
.github-calendar .calendar { width: 100% !important; margin: 0 !important; padding: 0 !important; border: 0 !important; border-radius: 0 !important; background: transparent !important; box-shadow: none !important; font-family: var(--font-mono) !important; color: var(--ink) !important; }
.github-calendar .sr-only { position: absolute !important; width: 1px !important; height: 1px !important; padding: 0 !important; margin: -1px !important; overflow: hidden !important; clip: rect(0, 0, 0, 0) !important; clip-path: inset(50%) !important; white-space: nowrap !important; border: 0 !important; }
.github-calendar .js-calendar-graph { width: 100% !important; margin: 0 !important; padding: 0 !important; overflow: visible !important; }
.github-calendar .js-calendar-graph-svg { display: block; width: 100% !important; height: auto !important; margin: 0 !important; overflow: visible !important; }
.github-calendar .contrib-legend, .github-calendar .ContributionCalendar-legend { font-size: 0.58rem !important; color: var(--muted) !important; opacity: 0.8; }
.github-calendar .ContributionCalendar-day { outline: none !important; rx: 1.5px; ry: 1.5px; transition: opacity 0.15s, filter 0.15s; }
.github-calendar .ContributionCalendar-day[data-level="0"] { fill: color-mix( in srgb, var(--ink) 5%, transparent ) !important; background-color: color-mix( in srgb, var(--ink) 5%, transparent ) !important; }
.github-calendar .ContributionCalendar-day[data-level="1"] { fill: color-mix( in srgb, var(--accent) 20%, transparent ) !important; background-color: color-mix( in srgb, var(--accent) 20%, transparent ) !important; }
.github-calendar .ContributionCalendar-day[data-level="2"] { fill: color-mix( in srgb, var(--accent) 40%, transparent ) !important; background-color: color-mix( in srgb, var(--accent) 40%, transparent ) !important; }
.github-calendar .ContributionCalendar-day[data-level="3"] { fill: color-mix( in srgb, var(--accent) 67%, transparent ) !important; background-color: color-mix( in srgb, var(--accent) 67%, transparent ) !important; }
.github-calendar .ContributionCalendar-day[data-level="4"] { fill: var(--accent) !important; background-color: var(--accent) !important; }
.github-calendar .ContributionCalendar-day:hover { opacity: 0.72; filter: brightness(0.92); }
.github-calendar .svg-tip { padding: 0.5rem 0.65rem !important; border: 1px solid var(--line) !important; border-radius: 0 !important; background: var(--ink) !important; box-shadow: none !important; font: 400 0.62rem/1.4 var(--font-mono) !important; color: var(--bg) !important; }
.github-calendar .svg-tip::after { display: none !important; }
.github-activity-note { margin: 0.75rem 0 0; font: italic 400 0.95rem/1.4 var(--font-serif); color: var(--muted); }

@media (max-width: 1100px) {
  .home-hero { grid-template-columns: minmax(0, 1.25fr) minmax(285px, .75fr); gap: 35px; }
  .home-intro h1 { font-size: clamp(3.8rem, 6.6vw, 6.5rem); }
  .research-entry h2 { font-size: clamp(2.25rem, 3vw, 3.3rem); }
}

@media (max-width: 1180px) {
  .page-intro { grid-template-columns: 1fr; gap: 10px; padding-block: 45px 36px; }
  .page-intro > p, .gallery-intro-layout > div:last-child > p { max-width: 760px !important; }
}

@media (max-width: 800px) {
  .shell { width: min(calc(100% - 36px), 1460px); }
  .site-header { min-height: 85px; flex-wrap: wrap; gap: 10px; padding-block: 14px; }
  .site-nav { order: 3; width: 100%; margin-left: 0; justify-content: space-between; gap: 10px; overflow-x: auto; }
  .site-nav a { font-size: .62rem; white-space: nowrap; }
  .theme-toggle { margin-left: auto; }
  .home-main { padding-block: 45px 70px; }
  .home-hero { grid-template-columns: 1fr; gap: 35px; }
  .home-intro { padding: 0; }
  .home-intro h1 { font-size: clamp(3.6rem, 11vw, 6.5rem); }
  .home-aside { min-height: 250px; }
  .page-intro { grid-template-columns: 1fr; gap: 12px; padding-block: 40px 32px; }
  .page-intro h1 { font-size: clamp(3.6rem, 11vw, 6.5rem); }
  .research-overview .sidebar-note { grid-template-columns: 1fr; gap: 8px; }
  .research-grid { gap: 16px; }
  .research-card, .research-wide { grid-column: 1 / -1; }
  .research-wide { grid-template-columns: 1fr; }
  .research-wide > * { grid-column: 1 / -1; }
  .photo-gallery { padding: 16px; margin-block: 30px 70px; }
  .photo-wall { gap: 22px 12px; }
  .photo-artifact { grid-column: span 6 !important; }
  .photo-open img { height: 290px; }
  .photo-artifact figcaption { display: block; }
  .photo-artifact figcaption small { display: block; text-align: left; margin-top: 4px; }
}

@media (max-width: 700px) {

  .github-activity { margin-top: 2.5rem; padding-top: 2rem; }
  .github-activity-header { flex-direction: column; align-items: flex-start; gap: 1rem; margin-bottom: 1.5rem; }
  .github-calendar { overflow-x: auto; padding-bottom: 0.5rem; }
  .github-calendar .calendar { min-width: 680px !important; }
}

@media (max-width: 520px) {
  .brand-initials { gap: 6px; }
  .brand-icon { width: 18px; height: 18px; }
  .brand-text small { font-size: .49rem; }
  .site-nav a { font-size: .54rem; }
  .home-intro h1, .page-intro h1 { font-size: clamp(3.05rem, 11vw, 4.4rem); }
  .home-intro > p, .page-intro > p, .gallery-intro-layout > div:last-child > p { font-size: 1.25rem; }
  .home-aside { padding: 30px; }
  .home-aside p { font-size: 1.55rem; }
  .research-grid { grid-template-columns: 1fr; padding-top: 25px; }
  .research-entry { padding: 24px; }
  .research-entry h2 { font-size: 2.4rem; }
  .data-box { grid-template-columns: 1fr; }
  .photo-artifact { grid-column: 1 / -1 !important; }
  .photo-open img { height: auto; max-height: 520px; }
  .photo-artifact figcaption { display: flex; }
  .photo-artifact figcaption small { text-align: right; }
  .photo-lightbox { padding: 50px 14px 80px; }
  .lightbox-nav { top: auto; bottom: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}

@media (max-width: 600px) {
  .research-overview .sidebar-note { justify-items: center; text-align: center; }
  .interest-list { justify-content: center; }
}

.research-wide { display: block; }
.research-columns { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(36px, 6vw, 100px); }
.research-column p { font-size: .95rem; line-height: 1.78; color: var(--muted); margin: 0 0 1.2rem; }

@media (max-width: 800px) { .research-columns { grid-template-columns: 1fr; gap: 0; } }
.research-card { display: flex; flex-direction: column; }
.research-card .project-note, .research-card .btn { margin-top: auto; align-self: flex-start; }

@media (max-width: 360px) { .theme-toggle span { display: none; } }