/* ===== Fonts (self-hosted subsets; licences in fonts/OFL.txt) ===== */
@font-face { font-family: "EB Garamond"; src: url("../fonts/eb-garamond.woff2") format("woff2"); font-weight: 400 600; font-style: normal; font-display: swap; }
@font-face { font-family: "EB Garamond"; src: url("../fonts/eb-garamond-italic.woff2") format("woff2"); font-weight: 400 500; font-style: italic; font-display: swap; }
@font-face { font-family: "Cormorant Garamond"; src: url("../fonts/cormorant-garamond.woff2") format("woff2"); font-weight: 500 700; font-style: normal; font-display: swap; }
@font-face { font-family: "Cormorant Garamond"; src: url("../fonts/cormorant-garamond-italic.woff2") format("woff2"); font-weight: 500; font-style: italic; font-display: swap; }

/* ===== Theme colours (edit here) ===== */
:root, [data-theme="light"] {
  --bg: #f6f1e7;          /* warm ivory */
  --bg-alt: #ede5d6;
  --text: #1c1714;
  --muted: #6e6359;
  --accent: #7b1626;      /* oxblood */
  --accent-ink: #7b1626;  /* accent as TEXT (links, labels, focus): equals --accent here; lifted in the dark theme to pass 4.5:1 */
  --border: #ddd2bf;
  --nav-bg: rgba(246, 241, 231, .9);
  --font-display: "Cormorant Garamond", "EB Garamond", Georgia, serif;
  --font-serif: "EB Garamond", Georgia, "Times New Roman", serif;
  --label-track: .08em;   /* tracking of the small-caps labels (nav, dates, links) */
  --label-weight: 460;     /* their weight; one step heavier in the dark theme */
  --maxw: 780px;
  --radius: 6px;          /* small controls, thumbnails, code blocks (the portrait keeps its own 14px) */
  color-scheme: light;    /* native scrollbars follow the theme */
}
/* Dark theme, "Tsukuyomi" */
[data-theme="dark"] {
  --bg: #0d0a0b;
  --bg-alt: #161112;
  --text: #e6dfda;
  --muted: #9d938d;
  --accent: #cf3a4c;
  --label-weight: 500;
  --accent-ink: #df4a5c;  /* same hue, a touch lighter: 4.1:1 -> 5.0:1 on the warm black, so links and small labels pass AA */
  --border: #2a2123;
  --nav-bg: rgba(13, 10, 11, .88);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
html.intro-active { overflow: hidden; }
::selection { background: color-mix(in srgb, var(--accent) 26%, var(--bg)); color: var(--text); }
/* very faint paper grain (the same noise tile as the intro; set by js/main.js) */
body::before { content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: .04; mix-blend-mode: multiply; background-size: 128px 128px; background-image: var(--grain, none); }
[data-theme="dark"] body::before { opacity: .03; mix-blend-mode: overlay; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: var(--font-serif); font-size: 19px; line-height: 1.62; font-optical-sizing: auto; font-variant-numeric: oldstyle-nums; font-feature-settings: "kern", "liga", "onum";
  -webkit-font-smoothing: antialiased;
  transition: background .3s, color .3s; overflow-x: hidden;
}
[data-theme="dark"] body { font-weight: 440; letter-spacing: .005em; } /* light text on dark wants a touch more weight (variable font) */
@media (max-width: 600px) { body { font-size: 18px; } }
main, .nav-inner, .site-footer, #about { max-width: var(--maxw); margin: 0 auto; padding-left: 16px; padding-right: 16px; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.2; margin: 0 0 .5rem; font-weight: 600; text-wrap: balance; }
h1 { font-size: clamp(2.2rem, 7vw, 3.1rem); }
h2 { font-size: 2.3rem; font-weight: 500; letter-spacing: .005em; padding-bottom: .35rem; border-bottom: 1px solid var(--border); margin-bottom: 1.3rem; position: relative; }
/* tiny crow motif at the end of each section rule */
/* tiny crow ornament at the end of each section rule (a real element, inserted by js/main.js; clickable easter egg) */
.crow-orn { position: absolute; right: 0; bottom: -9px; width: 26px; height: 13px; background-color: var(--bg); cursor: inherit;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 60 30'%3E%3Cpath fill='%23b3001b' d='M30 14C24 6 12 2 0 6c10 2 16 6 20 12-6-2-12-1-16 2 10 0 18 2 26 4 8-2 16-4 26-4-4-3-10-4-16-2 4-6 10-10 20-12C48 2 36 6 30 14z'/%3E%3C/svg%3E");
  background-size: 22px 11px; background-repeat: no-repeat; background-position: center; }
h3 { font-size: 1.25rem; }
@media (max-width: 600px) { h2 { font-size: 2rem; } }
strong { font-weight: 600; }
p { margin: 0 0 .8rem; }
p, li { text-wrap: pretty; } /* no one-word last lines */
/* The one label role: real small caps (smcp + c2sc, via font-variant-caps) in the text face, never uppercase-transformed.
   Sizes, tracking and colours are set per element below. */
.nav-links a, .hero-title p, .interests .label, .links, .news time, .pub-links, .intro-skip {
  font-family: var(--font-serif); font-weight: var(--label-weight); font-variant-caps: all-small-caps; text-transform: none; letter-spacing: var(--label-track); font-feature-settings: "kern", "liga", "onum", "pnum";
}
section { padding: 3.2rem 0 .5rem; }
a { color: var(--accent-ink); text-decoration: underline; text-decoration-thickness: 1px; text-decoration-color: color-mix(in srgb, var(--accent-ink) 50%, transparent); text-underline-offset: .22em; transition: text-decoration-color .2s, text-decoration-thickness .2s, color .2s; }
a:hover { text-decoration-color: var(--accent-ink); text-decoration-thickness: 2px; color: color-mix(in srgb, var(--accent-ink) 80%, var(--text)); }
:focus-visible { outline: 2px solid var(--accent-ink); outline-offset: 2px; }
a, summary { -webkit-tap-highlight-color: color-mix(in srgb, var(--accent) 14%, transparent); }
ul { padding: 0; margin: 0; list-style: none; }

/* ===== Nav ===== */
.site-nav { position: sticky; top: 0; z-index: 50; background: var(--nav-bg); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; gap: 1rem; min-height: 56px; position: relative; }
.brand { font-family: var(--font-display); font-size: 1.4rem; font-weight: 700; color: var(--text); text-decoration: none; margin-right: auto; }
.nav-links { display: flex; gap: .3rem; }
.nav-links a { position: relative; display: block; padding: .35rem .6rem; color: var(--text); text-decoration: none; font-size: 1.06rem; }
.nav-links a:hover, .nav-links a.active { color: var(--accent-ink); }
.nav-links a.active { box-shadow: inset 0 -2px 0 var(--accent); }
/* crow flourish: a tiny crow lifts off on hover */
.nav-links a::before {
  content: ""; position: absolute; left: 50%; top: -4px; width: 16px; height: 8px; margin-left: -8px; opacity: 0; pointer-events: none;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 60 30'%3E%3Cpath fill='%23b3001b' d='M30 14C24 6 12 2 0 6c10 2 16 6 20 12-6-2-12-1-16 2 10 0 18 2 26 4 8-2 16-4 26-4-4-3-10-4-16-2 4-6 10-10 20-12C48 2 36 6 30 14z'/%3E%3C/svg%3E") center/contain no-repeat;
}
.nav-links a:hover::before { animation: crow-off .7s ease-out; }
@keyframes crow-off { 0% { opacity: 0; transform: translate(0, 6px) scale(.6); } 25% { opacity: 1; } 100% { opacity: 0; transform: translate(14px, -16px) scale(1) rotate(-12deg); } }
.theme-toggle, .nav-toggle, .replay-btn { background: none; border: 1px solid var(--border); color: var(--text); border-radius: var(--radius); width: 36px; height: 36px; cursor: pointer; display: grid; place-items: center; padding: 0; transition: color .2s, border-color .2s; }
.theme-toggle:hover, .nav-toggle:hover { color: var(--accent-ink); border-color: var(--accent); }
/* replay-the-intro button: a small Sharingan that turns on hover */
.replay-btn { color: var(--text); text-decoration: none; }
.replay-btn:hover { color: var(--accent-ink); border-color: var(--accent); }
.replay-btn svg { transition: transform .9s cubic-bezier(.2,.7,.2,1); }
.replay-btn:hover svg, .replay-btn:focus-visible svg { transform: rotate(240deg); }
@media (prefers-reduced-motion: reduce) { .replay-btn svg { transition: none; } .nav-links a:hover::before { animation: none; } }
.nav-toggle { display: none; flex-direction: column; align-items: center; justify-content: center; gap: 4px; }
.nav-toggle span { display: block; width: 16px; height: 2px; background: currentColor; }

@media (max-width: 680px) {
  .nav-toggle { display: flex; }
  .js .nav-links { display: none; position: absolute; top: 56px; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--bg); border-bottom: 1px solid var(--border); padding: .5rem 16px; }
  .js .nav-links.open { display: flex; }
  .nav-links a { padding: .7rem 0; }
  .nav-links a.active { box-shadow: none; } /* the full-width underline is too heavy in the dropdown; the accent colour is enough */
  .nav-links { flex-wrap: wrap; } /* without JS: links simply wrap */
  html:not(.js) .nav-inner { flex-wrap: wrap; }
  /* phones: one row, always. The name may shrink a little; the three controls become light round icons
     grouped on the right (Sharingan replay, theme, then the menu at the far edge) */
  .js .nav-inner { flex-wrap: nowrap; gap: .15rem; }
  .brand { min-width: 0; font-size: clamp(1.12rem, 5.6vw, 1.4rem); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-right: auto; padding-right: .4rem; }
  .theme-toggle, .nav-toggle, .replay-btn { flex: none; width: 40px; height: 40px; border: 0; border-radius: 50%; -webkit-tap-highlight-color: transparent; transition: background-color .2s, color .2s; }
  .theme-toggle:hover, .nav-toggle:hover, .replay-btn:hover, .theme-toggle:active, .nav-toggle:active, .replay-btn:active,
  .nav-toggle[aria-expanded="true"] { color: var(--accent-ink); background: color-mix(in srgb, var(--accent) 9%, transparent); }
  .replay-btn { order: 1; } .theme-toggle { order: 2; } .nav-toggle { order: 3; margin-right: -6px; }
  .theme-toggle, .nav-toggle, .replay-btn { position: relative; }
  .theme-toggle::after, .nav-toggle::after, .replay-btn::after { content: ""; position: absolute; inset: -2px; } /* 44px tap target */
  .theme-toggle svg, .replay-btn svg { width: 19px; height: 19px; }
  .nav-toggle span { width: 18px; height: 1.5px; border-radius: 1px; }
}
@media (max-width: 340px) { .theme-toggle, .nav-toggle, .replay-btn { width: 34px; } .js .nav-inner { gap: 0; } } /* very narrow phones: more room for the name */
@media (min-width: 681px) and (max-width: 720px) { .nav-links a { padding-left: .5rem; padding-right: .5rem; } } /* the small-caps links are a touch wider: keep one row just above the menu breakpoint */

/* ===== Hero banner (full-bleed picture with the name over its lower part; one layout for both themes, only colours differ) ===== */
.hero-banner { position: relative; height: clamp(300px, 58vh, 620px); overflow: hidden; background: #0a0506; }
.hero-media { position: absolute; inset: 0; transform-origin: 50% 45%; animation: hero-drift 20s ease-in-out infinite alternate; }
.hero-imgs { position: absolute; inset: 0; transform-origin: 50% 45%; }
.hero-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: opacity .6s ease; }
.hero-img-sun { object-position: var(--pos-sun, 50% 40%); opacity: 0; transition: opacity var(--sun-fade, 2s) ease-in-out; }
.hero-img-sun.is-on { opacity: 1; }
.hero-img-night { object-position: var(--pos-night, 50% 50%); opacity: 0; filter: brightness(1.15) contrast(1.05); } /* gentle lift: the picture is very dark */
[data-theme="dark"] .hero-img-sun, [data-theme="dark"] .hero-img-sun.is-on { opacity: 0; }
[data-theme="dark"] .hero-img-night { opacity: 1; }
[data-theme="dark"] .hero-glow { display: none; }
/* red glow over the sun picture's eyes (positions and size set by js/main.js); a very slow, subtle pulse */
.hero-glow { position: absolute; border-radius: 50%; pointer-events: none; transform: translate(-50%, -50%);
  background: radial-gradient(circle, #ff2a2a 0%, rgba(255, 42, 42, .75) 18%, rgba(200, 0, 20, .28) 45%, rgba(200, 0, 20, 0) 70%);
  animation: hero-glow-pulse 3s ease-in-out infinite alternate; }
@keyframes hero-glow-pulse { from { opacity: .55; } to { opacity: .9; } }
@keyframes hero-drift { to { transform: scale(1.04); } }
/* the bottom of the picture melts into the page colour (light: parchment, dark: near-black) */
.hero-shade { position: absolute; inset: 0; background: linear-gradient(to bottom, transparent 0%, transparent 38%, color-mix(in srgb, var(--bg) 50%, transparent) 60%, color-mix(in srgb, var(--bg) 90%, transparent) 80%, var(--bg) 96%); }
[data-theme="dark"] .hero-shade { background: linear-gradient(to bottom, rgba(13,10,11,.25) 0%, rgba(13,10,11,.55) 60%, var(--bg) 100%); }
/* the name: centred at the foot of the picture, the same place in both themes; light = dark ink with an ivory glow, dark = white over a soft dark scrim */
.hero-title { position: absolute; left: 0; right: 0; bottom: clamp(1rem, 3vh, 1.8rem); text-align: center; color: #1c1714; padding: 0 16px; isolation: isolate; --scrim: rgba(246, 241, 231, .8); }
.hero-title::before { content: ""; position: absolute; z-index: -1; left: 0; right: 0; bottom: -2rem; height: calc(100% + 2.6rem); width: min(100%, 54rem); margin: 0 auto; pointer-events: none; background: radial-gradient(ellipse at 50% 62%, var(--scrim) 0%, transparent 70%); }
.hero-title h1 { font-family: var(--font-display); font-size: clamp(2.6rem, 7.4vw, 4.4rem); font-weight: 600; letter-spacing: .01em; margin: 0 0 .4rem; color: #1c1714; text-shadow: 0 0 18px rgba(246,241,231,.9), 0 0 4px rgba(246,241,231,.9), 0 0 44px rgba(246,241,231,.75); }
.hero-title p { margin: 0; font-size: 1.12rem; letter-spacing: .2em; color: #5a4f46; text-shadow: 0 0 18px rgba(246,241,231,.9), 0 0 4px rgba(246,241,231,.9); }
[data-theme="dark"] .hero-title { color: #fff; --scrim: rgba(6, 4, 5, .62); }
[data-theme="dark"] .hero-title h1 { color: #fff; text-shadow: 0 2px 16px rgba(0,0,0,.7), 0 0 40px rgba(0,0,0,.6); }
[data-theme="dark"] .hero-title p { color: rgba(255,255,255,.9); text-shadow: 0 1px 12px rgba(0,0,0,.8); }
/* >=900px: the first screen is one flex column, banner + About block. The About block keeps its natural height and the banner takes
   whatever the window has left after the nav (57px), within 300-760px, so nothing is cut by the fold and no script measures anything */
@media (min-width: 900px) {
  .first-screen { display: flex; flex-direction: column; min-height: calc(100vh - 57px); min-height: calc(100svh - 57px); }
  .hero-banner { flex: 1 1 auto; height: auto; min-height: 300px; max-height: 760px; }
  .hero-media, .hero-imgs { transform-origin: 50% 35%; } /* the drift grows the picture from about the figure's head, so the head stays clear of the name */
  .hero-title h1 { font-size: clamp(3.8rem, 6.4vw, 5.8rem); line-height: 1.1; letter-spacing: .015em; }
  .hero-title p { font-size: 1.2rem; letter-spacing: .2em; }
  #about { flex: none; width: 100%; padding-top: 20px; padding-bottom: 1.1rem; }
  :root { --photo-h: clamp(232px, 31svh, 266px); }
}
/* short desktop windows (1280x720, 1366x768): a slightly tighter About block keeps the links above the fold at the 19px body size */
@media (min-width: 900px) and (max-height: 800px) {
  #about { padding-top: 16px; padding-bottom: .9rem; }
  .hero-text p { line-height: 1.5; margin-bottom: .7rem; }
  .hero-foot { margin-top: .8rem; padding-top: .6rem; }
}
@media (prefers-reduced-motion: reduce) { .hero-media, .hero-glow { animation: none; } }

/* ===== Hero ===== */
.hero { padding-top: 0; }
.hero-row { display: flex; gap: 2rem; align-items: flex-start; }
.photo { width: 200px; height: 266px; border-radius: 14px; object-fit: cover; flex: none; border: 4px solid var(--bg); box-shadow: 0 0 0 2px var(--accent), 0 12px 22px -12px rgba(28, 23, 20, .4); position: relative; z-index: 3; } /* the ring is the frame; the lift underneath is a real offset shadow, not a coloured halo */
[data-theme="dark"] .photo { box-shadow: 0 0 0 2px var(--accent), 0 12px 26px -10px rgba(0, 0, 0, .9); }
#about { scroll-margin-top: 100vh; } /* part of the first screen: its links scroll to the very top (the banner), not to this block */
@media (min-width: 900px) { .photo { height: var(--photo-h); width: calc(var(--photo-h) * .75); } } /* scales a little with the window height */
.photo-ph { display: grid; place-items: center; background: var(--bg-alt); color: var(--muted); font-size: .9rem; }
.hero-text p { margin-bottom: .95rem; }
.hero-text p:first-child { margin-top: -.4rem; } /* first line's cap height lines up with the top of the photo */
.hero-text p:last-child { margin-bottom: 0; }
/* under the photo + bio, across the full width: research interests, then the links */
.hero-foot { margin-top: 1.1rem; padding-top: .8rem; border-top: 1px solid var(--border); }
.interests { margin: 0; font-size: 1.1rem; color: var(--muted); }
.interests .label { display: inline-block; margin-right: .9rem; font-size: 1.02rem; color: var(--accent-ink); }
.links { display: flex; flex-wrap: wrap; gap: .3rem 1.4rem; margin-top: .5rem; font-size: 1.06rem; }
.links a { text-decoration: none; padding-bottom: 2px; border-bottom: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); transition: border-bottom-color .2s, color .2s; }
.links a:hover { border-bottom-color: var(--accent); }
@media (max-width: 600px) { .hero-row { flex-direction: column; align-items: center; text-align: center; } .hero-foot { text-align: center; } .interests .label { display: block; margin: 0 0 .15rem; } .links { justify-content: center; margin-top: 1.1rem; } .photo { width: 150px; height: 200px; } .hero-text p:first-child { margin-top: 0; } }

/* ===== News ===== */
.news li { display: flex; align-items: baseline; gap: 1.2rem; padding: .45rem 0; }
.news time { flex: none; width: 5.2rem; color: var(--muted); font-size: 1rem; font-variant-numeric: tabular-nums oldstyle-nums; font-feature-settings: "kern", "onum", "tnum"; }
@media (max-width: 480px) { .news li { flex-direction: column; gap: 0; } .news time { padding-top: 0; } }

/* ===== Publications ===== */
.pub { display: flex; gap: 1.2rem; padding: 1.2rem 0; border-bottom: 1px solid var(--border); }
.pub:first-child { padding-top: 0; }
.pub:last-child { border-bottom: 0; }
.thumb { flex: none; width: 168px; height: 116px; border-radius: var(--radius); object-fit: cover; border: 1px solid var(--border); background: var(--bg-alt); margin-top: .2rem; }
.pub-body { min-width: 0; }
.pub h3 { font-family: var(--font-display); font-size: 1.42rem; font-weight: 600; line-height: 1.2; margin-bottom: .3rem; font-feature-settings: "kern", "liga"; }
.authors { margin: 0 0 .2rem; font-size: .95rem; line-height: 1.5; letter-spacing: 0; color: var(--muted); }
.authors strong { color: var(--text); font-weight: 600; }
.venue { margin: 0 0 .35rem; font-size: 1.05rem; font-style: italic; color: var(--text); }
.venue em { font-style: italic; }
.pub-links { margin: 0; font-size: 1rem; }
.pub-links > a, .bibtex summary { display: inline-block; text-decoration: none; margin-right: 1rem; padding-bottom: 1px; border-bottom: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); transition: border-bottom-color .2s, color .2s; }
.pub-links > a:hover, .bibtex summary:hover { border-bottom-color: var(--accent); }
.bibtex { display: inline-block; margin: 0; }
.bibtex[open] { display: block; margin-top: .5rem; }
.bibtex summary { cursor: pointer; color: var(--accent-ink); list-style: none; margin-right: 0; }
.bibtex summary::-webkit-details-marker { display: none; }
pre { overflow-x: auto; background: var(--bg-alt); border: 1px solid var(--border); padding: .8rem .9rem; border-radius: var(--radius); font-family: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace; font-size: .74rem; line-height: 1.55; letter-spacing: 0; text-transform: none; font-weight: 400; color: var(--text); margin: .6rem 0 0; white-space: pre-wrap; overflow-wrap: anywhere; } /* wrap long BibTeX lines instead of a keyboard-unreachable sideways scroll */
[data-theme="dark"] .thumb { filter: brightness(.9); } /* the figures are light; take the glare off on the dark page */
@media (max-width: 560px) { .pub { flex-direction: column; gap: .7rem; } .thumb { width: 100%; height: auto; aspect-ratio: 400 / 280; max-height: 220px; object-position: 50% 0; margin-top: 0; } } /* phones: full width above the text */

/* ===== Teaching ===== */
.plain li { padding: .3rem 0; max-width: 70ch; } /* same measure as the news lines */
.note { display: block; margin-top: .15rem; font-size: .95rem; letter-spacing: 0; color: var(--muted); }

/* ===== Footer ===== */
.site-footer { margin-top: 3rem; padding-top: 1.5rem; padding-bottom: 2rem; border-top: 1px solid var(--border); text-align: center; color: var(--muted); font-size: .92rem; letter-spacing: 0; }
.site-footer p { margin: 0 0 .4rem; }
.site-footer a { white-space: nowrap; }
.credit { font-size: .82rem; } /* quieter by size, not by opacity (opacity .7 dropped it to 2.9:1) */

/* ===== Intro overlay (content built by js/intro.js) ===== */
.intro-overlay { display: none; position: fixed; inset: 0; z-index: 9999; background: #000; overflow: hidden; }
html.intro-active .intro-overlay, html.intro-flash .intro-overlay { display: block; }
.intro-layer { position: absolute; inset: 0; }
.intro-seq { transform-origin: 50% 50%; will-change: transform, opacity; }
.intro-canvas { width: 100%; height: 100%; display: block; }
/* portrait phones: the picture is a letterboxed strip; soft dark edges make it read as cinematic */
.intro-vignette { position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(to bottom, rgba(0,0,0,.65), transparent 22%, transparent 78%, rgba(0,0,0,.65)),
              radial-gradient(ellipse at center, transparent 62%, rgba(0,0,0,.5) 100%); }
/* ----- Title card (film-style): near-black field, a deep-crimson glow, grain and vignette ----- */
.intro-eye { background: #070405; will-change: opacity; overflow: hidden; }
.eye-glow { position: absolute; inset: 0; background: radial-gradient(ellipse 60% 55% at 50% 38%, rgba(90, 6, 16, .75), transparent 70%); pointer-events: none; }
.eye-vig { position: absolute; inset: 0; background: radial-gradient(ellipse at center, transparent 45%, rgba(0, 0, 0, .7) 100%); pointer-events: none; }
.intro-grain { position: absolute; inset: 0; background-size: 128px 128px; opacity: .09; mix-blend-mode: overlay; pointer-events: none; }
.eye-stage { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: clamp(.4rem, 1.5vh, 1rem);
  padding: 0 16px 4vh; transform: translateY(-3vh); z-index: 2; }
/* drawn Mangekyo: smaller, finely textured, with a soft static bloom behind it */
.eye-wrap { position: relative; width: clamp(170px, 34vmin, 340px); aspect-ratio: 1; will-change: transform, opacity; }
.eye-wrap::before { content: ""; position: absolute; inset: -38%; border-radius: 50%; background: radial-gradient(circle, rgba(190, 14, 36, .38), transparent 62%); z-index: -1; }
.eye-wrap svg { width: 100%; height: 100%; display: block; }
/* real eye footage: borderless; its edges are feathered into the black by a mask in the canvas */
.eye-band { position: relative; width: min(1200px, 100vw); aspect-ratio: 2.39 / 1; will-change: transform, opacity; }
.eye-band-media { width: 100%; height: 100%; display: block; }
.eye-copy { display: flex; flex-direction: column; align-items: center; text-align: center; max-width: 92vw; }
.eye-text { font-family: "Cormorant Garamond", Georgia, serif; font-style: italic; font-weight: 500; font-size: clamp(1.5rem, 3.6vw, 2.9rem); letter-spacing: .07em;
  color: #ebe3d9; margin: 0; line-height: 1.25; text-wrap: balance; }
.eye-band.bw .eye-band-media, .eye-wrap.bw svg { filter: grayscale(1) contrast(1.15); } /* static class, toggled (never animated) */
.eye-jit { position: absolute; left: 0; top: 0; width: 100%; height: 100%; display: block; }
.eye-jit-split { mix-blend-mode: screen; }
.eye-text .w { display: inline-block; will-change: transform, opacity; }
.intro-shard { position: absolute; inset: 0; }
.intro-crows { pointer-events: none; }
.intro-defs { position: absolute; width: 0; height: 0; }
/* Crow: one frame of the 8-frame raven sprite strip (frames 256x380, facing right).
   --w = on-screen frame width, --ratio = frame height / width (from CONFIG.crowFrame), --flap = flap period, --phase = random start point (all set in JS). */
.intro-crow { --w: 256px; position: absolute; left: 0; top: 0; visibility: hidden; will-change: transform, opacity;
  width: var(--w); height: calc(var(--w) * var(--ratio, 1.484));
  background: url(../assets/intro/crow/crow-side.png) 0 0 / calc(var(--w) * 8) 100% no-repeat;
  animation: crow-flap var(--flap, .667s) steps(8) infinite; animation-delay: calc(var(--flap, .667s) * var(--phase, 0)); }
@keyframes crow-flap { to { background-position: calc(var(--w) * -8) 0; } }
/* tiny red Sharingan eye on a few crows (the anime crows have red eyes) */
/* A little static blur on a big foreground crow suggests depth (rendered once, then just moved). */
.intro-crow.crow-mid { filter: blur(1px); }
.intro-crow-nb { position: absolute; left: 0; top: 0; visibility: hidden; will-change: transform, opacity; }
.nb-img { display: block; width: 100%; height: auto; transform-origin: 50% 55%; animation: nb-flutter .3s ease-in-out infinite alternate;
  filter: brightness(.75) contrast(1.15); } /* near-black silhouette like the anime crows; calm ~3 Hz wingbeat */
@keyframes nb-flutter { from { transform: translateY(-2px) scaleY(1); } to { transform: translateY(2px) scaleY(.95); } }
.nb-blur { filter: blur(2px); } /* static blur on the rushing-at-camera crows only */
.nb-blur .nb-img { animation: none; } /* big blurred crows skip the wingbeat */
.intro-feather { position: absolute; left: 0; top: 0; visibility: hidden; will-change: transform, opacity; }
.intro-feather img { height: 100%; width: auto; display: block; }
/* loading spinner: a tiny spinning tomoe on black, only shown if loading is slow */
.intro-spinner { position: absolute; left: 50%; top: 50%; width: 28px; height: 28px; margin: -14px 0 0 -14px; }
.intro-spinner svg { width: 100%; height: 100%; animation: intro-spin 1.1s linear infinite; }
@keyframes intro-spin { to { transform: rotate(360deg); } }
/* skip hint: small text bottom-right, hidden at first (js/intro.js adds .show-skip ~1.5 s in). Any click or key skips anyway.
   Opacity comes from a one-shot keyframe + the class, not a transition, so the timeline's inline opacity fade at the shatter is not fought. */
.intro-skip { position: absolute; z-index: 10; right: max(2px, calc(env(safe-area-inset-right) - 18px)); bottom: max(4px, calc(env(safe-area-inset-bottom) - 16px));
  min-width: 44px; min-height: 44px; padding: 16px 18px; border: 0; background: none; cursor: pointer; opacity: 0; -webkit-tap-highlight-color: transparent;
  font-size: 1rem; line-height: 1; letter-spacing: .12em; white-space: nowrap;
  color: rgba(255, 255, 255, .5); text-shadow: 0 0 8px rgba(0, 0, 0, .6); text-decoration: underline transparent 1px; text-underline-offset: 6px;
  transition: color .2s, text-decoration-color .2s; }
.intro-overlay.show-skip .intro-skip { opacity: 1; animation: intro-skip-in .6s ease; }
@keyframes intro-skip-in { from { opacity: 0; } }
.intro-skip:hover, .intro-skip:focus-visible { color: rgba(255, 255, 255, .9); text-decoration-color: rgba(255, 255, 255, .45); }
.intro-skip:focus-visible { outline: 2px solid rgba(255, 255, 255, .85); outline-offset: -6px; border-radius: 2px; }
/* (reduced motion: the head script in index.html only skips the AUTOMATIC intro; an explicit replay, ?intro=1, still plays) */

/* ===== Homepage feathers (a few drift through the banner; a puff comes out of the theme button) ===== */
.hero-feathers { position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 1; }
.fx-feather { position: absolute; left: 0; top: 0; pointer-events: none; will-change: transform, opacity; }
.fx-puff { position: fixed; z-index: 60; }
@media (prefers-reduced-motion: reduce) { .hero-feathers, .fx-puff { display: none; } }
[data-theme="dark"] .hero-feathers .fx-feather { filter: brightness(2.2) contrast(.9); } /* charcoal feathers need a lift on the dark banner */

/* ===== Feather cursor (mouse / fine pointers only) ===== */
@media (hover: hover) and (pointer: fine) {
  body { cursor: auto; cursor: url("../assets/cursor-feather.png") 4 4, auto; cursor: image-set(url("../assets/cursor-feather.png") 1x, url("../assets/cursor-feather@2x.png") 2x) 4 4, auto; }
  a, button, summary, [role="button"] { cursor: pointer; }
  p, h1, h2, h3, li, pre, time { cursor: text; }
  input, textarea, select { cursor: revert; }
}
/* the "sharingan" easter egg: a spinning Mangekyo follows the mouse and the cursor is hidden for a few seconds */
html.sharingan-mode, html.sharingan-mode * { cursor: none !important; }
.sharingan-cursor { position: fixed; left: 0; top: 0; width: 28px; height: 28px; margin: -14px 0 0 -14px; pointer-events: none; z-index: 99999; animation: intro-spin .9s linear infinite; }
.sharingan-cursor svg { width: 100%; height: 100%; display: block; }

/* carry the page's paper grain over the banner's fade, so there is no visible edge where the banner ends */
.hero-shade::after { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .04; mix-blend-mode: multiply; background-size: 128px 128px; background-image: var(--grain, none);
  -webkit-mask-image: linear-gradient(to bottom, transparent 40%, #000 90%); mask-image: linear-gradient(to bottom, transparent 40%, #000 90%); }

/* ===== 404 page (404.html): centred block with a faint Sharingan behind the number ===== */
.nf { position: relative; min-height: calc(100vh - 57px); min-height: calc(100svh - 57px); display: grid; place-items: center; text-align: center; padding-top: 1rem; padding-bottom: 8vh; }
.nf-eye { position: absolute; inset: 0; display: grid; place-items: center; pointer-events: none; color: var(--accent); opacity: .08; }
[data-theme="dark"] .nf-eye { opacity: .13; }
.nf-eye svg { width: min(86vw, 440px); height: auto; margin-bottom: calc(8vh - 1rem); animation: intro-spin 120s linear infinite; }
.nf-body { position: relative; }
.nf-code { font-size: clamp(6rem, 26vw, 11.5rem); font-weight: 500; line-height: .95; letter-spacing: .02em; color: var(--accent); margin: 0 0 .5rem; font-feature-settings: "kern", "liga", "lnum"; font-variant-numeric: lining-nums; } /* lining figures: oldstyle made it read "4o4" */
.nf-line { font-family: var(--font-display); font-style: italic; font-weight: 500; font-size: clamp(1.45rem, 4.4vw, 2rem); line-height: 1.3; margin: 0 0 .5rem; }
.nf-sub { margin: 0; color: var(--muted); font-size: 1.05rem; text-wrap: balance; }
.nf-links { justify-content: center; margin-top: 1.6rem; }
@media (prefers-reduced-motion: reduce) { .nf-eye svg { animation: none; } }

/* ===== Print: a plain, black-on-white CV-like page ===== */
@media print {
  .intro-overlay, .site-nav, .theme-toggle, .replay-btn, .hero-media, .hero-shade, .hero-title::before, .hero-feathers, .intro-crow, .intro-crow-nb, .intro-feather,
  .fx-puff, .sharingan-sw, .sharingan-cursor, .crow-orn, .site-footer .credit, #replay-intro, .thumb, .photo, body::before, .bibtex { display: none !important; }
  html, body { background: #fff !important; color: #000 !important; font-size: 11pt; }
  * { background: transparent !important; box-shadow: none !important; text-shadow: none !important; animation: none !important; }
  h1, h2, h3, body { font-family: Georgia, "Times New Roman", serif; color: #000 !important; }
  h2 { border-bottom: 1px solid #000; }
  .hero-banner { height: auto; overflow: visible; background: none; }
  .hero-title { position: static; color: #000 !important; padding: 0 0 .5rem; text-align: left; }
  .hero-title h1 { color: #000 !important; font-size: 26pt; margin: 0; }
  .hero-title p { color: #000 !important; letter-spacing: .1em; }
  .hero-row { display: block; }
  .hero-text p:first-child { margin-top: .6rem; }
  .first-screen { display: block; min-height: 0; }
  .hero-banner { flex: none; min-height: 0; max-height: none; }
  #about { padding-top: 0; }
  a { color: #000 !important; text-decoration: underline; }
  .pub-links > a::after, .links a::after { content: " (" attr(href) ")"; font-size: 9pt; color: #333; }
  .venue, .authors, .interests, .note, .news time, .site-footer { color: #333 !important; }
  .hero-banner { padding: 0 16px; max-width: var(--maxw); margin: 0 auto; }
  .pub { break-inside: avoid; page-break-inside: avoid; }
  .site-footer { border: 0; }
}

/* touch screens: the small small-caps links get a 44px-high hit area without changing how they look */
@media screen and (pointer: coarse) {
  .links { row-gap: .7rem; }
  .links a, .pub-links > a, .bibtex summary { position: relative; }
  .links a::after, .pub-links > a::after, .bibtex summary::after { content: ""; position: absolute; inset: -11px -5px; }
}
@media screen and (pointer: coarse) and (min-width: 681px) { .nav-links a::after { content: ""; position: absolute; inset: -6px 0; } }

/* narrow phones: keep the banner subtitle on one line */
@media (max-width: 600px) { .hero-title p { font-size: .95rem; letter-spacing: .1em; } }
@media (max-width: 380px) { .hero-title p { font-size: .9rem; letter-spacing: .06em; } }
@media (max-width: 340px) { .hero-title p { letter-spacing: .02em; } }
/* phones: long bio paragraphs read better left-aligned (photo, interests and links stay centred) */
@media (max-width: 600px) { .hero-text p { text-align: left; } }