:root {
  --paper: #fbfaf7;
  --paper-deep: #f3f2ed;
  --panel: #f5f5f1;
  --surface: #ffffff;
  --ink: #1f2428;
  --ink-soft: #5b6268;
  --accent: #23466e;
  --accent-dark: #142f4f;
  --accent-wash: rgba(35, 70, 110, 0.12);
  --warm: #a4542f;
  --line: #d9d9d3;
  --footer: #232a31;
  --footer-ink: #c5ccd2;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #15191d;
    --paper-deep: #1b2025;
    --panel: #1c2127;
    --surface: #15191d;
    --ink: #e6e4de;
    --ink-soft: #a3a9ae;
    --accent: #8db4dd;
    --accent-dark: #b4cfeb;
    --accent-wash: rgba(141, 180, 221, 0.14);
    --warm: #e09468;
    --line: #2f363d;
    --footer: #0f1215;
    --footer-ink: #9aa2a9;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #15191d; --paper-deep: #1b2025; --panel: #1c2127; --surface: #15191d;
  --ink: #e6e4de; --ink-soft: #a3a9ae; --accent: #8db4dd; --accent-dark: #b4cfeb;
  --accent-wash: rgba(141, 180, 221, 0.14); --warm: #e09468; --line: #2f363d;
  --footer: #0f1215; --footer-ink: #9aa2a9; color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: clip;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16.5px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; height: auto; }
a {
  color: var(--accent-dark);
  text-decoration-color: color-mix(in srgb, var(--accent) 35%, transparent);
  text-underline-offset: 0.18em;
}
a:hover { color: var(--accent); text-decoration-color: currentColor; }
a:focus-visible { outline: 3px solid var(--warm); outline-offset: 4px; }
.skip-link {
  position: fixed; top: 1rem; left: 1rem; z-index: 100;
  transform: translateY(-180%);
  padding: 0.6rem 1rem; background: var(--ink); color: var(--paper); border-radius: 999px;
}
.skip-link:focus { transform: none; }
.shell { width: min(1120px, calc(100% - 3rem)); margin-inline: auto; }

/* Header */
.site-header { border-bottom: 1px solid var(--line); }
.nav-shell { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.wordmark { color: var(--ink); font-size: 1.2rem; font-weight: 700; text-decoration: none; }
.home-header .wordmark { visibility: hidden; }
.site-nav { display: flex; flex-wrap: wrap; align-items: center; gap: 0.4rem clamp(1rem, 2.4vw, 1.8rem); font-size: 0.94rem; font-weight: 600; }
.site-nav a { position: relative; color: var(--ink-soft); text-decoration: none; }
.site-nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -0.35rem; height: 1px;
  background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform 160ms ease;
}
.site-nav a:hover, .site-nav a.active { color: var(--ink); }
.site-nav a:hover::after, .site-nav a.active::after { transform: scaleX(1); }

/* Light/dark toggle */
.theme-toggle {
  display: inline-grid; place-items: center; width: 34px; height: 34px; margin-left: 0.15rem; padding: 0;
  border: 1px solid var(--line); border-radius: 50%; background: transparent; color: var(--ink-soft);
  cursor: pointer; transition: color 150ms ease, border-color 150ms ease;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }
.theme-toggle:focus-visible { outline: 2px solid var(--warm); outline-offset: 3px; }
.theme-toggle svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: block; }
  :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: none; }
}

/* Hero */
.profile-hero {
  display: grid; grid-template-columns: minmax(0, 1fr) 300px; align-items: start;
  gap: clamp(2.5rem, 7vw, 6rem); padding-block: clamp(3rem, 6vw, 5rem) clamp(2.5rem, 5vw, 4rem);
}
.profile-hero h1 { margin: 0; font-size: clamp(2.6rem, 5.5vw, 4.1rem); font-weight: 600; line-height: 1.05; letter-spacing: -0.02em; }
.profile-tagline { margin: 0.6rem 0 0; color: var(--accent); font-size: 1.02rem; font-weight: 600; letter-spacing: 0.01em; }
.profile-role { margin: 1.6rem 0 0; font-size: clamp(1.08rem, 1.6vw, 1.2rem); }
.profile-research { margin: 1rem 0 0; color: var(--ink-soft); font-size: 1.05rem; }
.quick-links { display: flex; flex-wrap: wrap; gap: 0.45rem 1.25rem; margin-top: 1.4rem; font-size: 0.92rem; font-weight: 600; }
.profile-aside { margin: 0.6rem 0 0; }
.portrait { position: relative; aspect-ratio: 1; border-radius: 50%; background: var(--panel); overflow: hidden; box-shadow: 0 0 0 1px var(--line), 0 0 0 7px var(--paper), 0 0 0 8px var(--line); }
.portrait img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.portrait-fallback { position: absolute; inset: 0; width: 100%; height: 100%; }
.portrait-fallback text { fill: var(--accent); font-family: var(--serif); font-size: 64px; font-weight: 600; letter-spacing: 0.04em; }
.portrait-fallback .grid-line { stroke: var(--line); stroke-width: 1; }
.portrait-fallback .curve { fill: none; stroke: var(--accent); stroke-width: 1.6; opacity: 0.55; }

/* Sections */
.section-pad { padding-block: clamp(2.75rem, 5vw, 4rem); }
.tinted { background: var(--paper-deep); }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; padding-bottom: 0.9rem; border-bottom: 1px solid var(--ink); }
.section-heading h2 { margin: 0; font-size: clamp(1.7rem, 2.8vw, 2.15rem); font-weight: 600; letter-spacing: -0.015em; }
.section-heading a { font-size: 0.9rem; font-weight: 600; }
.rule-label { margin: 0 0 0.5rem; color: var(--accent); font-size: 0.86rem; font-weight: 600; letter-spacing: 0.02em; }

/* Research topics */
.research-topic { display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: clamp(1.5rem, 4vw, 3rem); padding-block: clamp(2.2rem, 4vw, 3rem); border-bottom: 1px solid var(--line); }
.research-topic:last-child { border-bottom: 0; }
.topic-label p { position: sticky; top: 1.5rem; margin: 0.35rem 0 0; color: var(--accent); font-size: 0.82rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; }
.research-topic h3 { margin: 0; font-size: clamp(1.35rem, 2.3vw, 1.7rem); font-weight: 600; line-height: 1.25; letter-spacing: -0.01em; }
.home-paper { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: clamp(1.4rem, 3vw, 2.2rem); align-items: start; margin-top: 1.6rem; }
.home-paper h4 { margin: 0; font-size: 1.2rem; font-weight: 600; line-height: 1.3; }
.home-paper h4 a { text-decoration-color: transparent; }
.home-paper h4 a:hover { text-decoration-color: currentColor; }
.home-paper-copy > p { margin: 0.7rem 0 0; color: var(--ink-soft); }
.home-paper-copy .rule-label { margin: 0 0 0.45rem; }
.collaborators { font-size: 0.9rem; }

/* Diagrams */
.work-concept { margin: 0; padding: 0.6rem; display: grid; place-items: center; background: var(--panel); border: 1px solid var(--line); }
.work-concept svg { width: 100%; height: auto; overflow: visible; }
.d-overline { fill: var(--ink-soft); font-family: var(--serif); font-size: 11px; font-weight: 700; letter-spacing: 0.13em; }
.d-label { fill: var(--ink-soft); font-family: var(--serif); font-size: 11.5px; font-weight: 700; letter-spacing: 0.05em; }
.d-note { fill: var(--ink-soft); font-family: var(--serif); font-size: 12px; font-weight: 600; }
.d-math { fill: var(--ink); font-family: var(--serif); font-size: 18px; font-weight: 700; }
.d-math-i { fill: var(--ink); font-family: var(--serif); font-size: 18px; font-style: italic; }
.d-accent { fill: var(--accent); }
.d-warm { fill: var(--warm); }
.d-divider { stroke: var(--line); stroke-width: 1; }
.d-axis { stroke: var(--ink-soft); stroke-width: 1.3; fill: none; }
.d-bar { fill: var(--accent); opacity: 0.85; }
.d-bar-soft { fill: var(--accent); opacity: 0.35; }
.d-arrow { fill: none; stroke: var(--accent); stroke-width: 2.4; }
.d-arrowhead { fill: var(--accent); }
.d-box { fill: var(--surface); stroke: var(--accent); stroke-width: 1.8; }
.d-edge { stroke: var(--accent); stroke-width: 2; opacity: 0.5; }
.d-node { fill: var(--surface); stroke: var(--accent); stroke-width: 2.2; }
.d-node-hot { fill: var(--warm); stroke: var(--surface); stroke-width: 2.5; }
.d-node-near { fill: var(--accent); stroke: var(--surface); stroke-width: 2; }
.d-hood { fill: var(--accent-wash); stroke: var(--accent); stroke-width: 1.4; stroke-dasharray: 5 5; }
.d-ellipse { fill: var(--accent-wash); stroke: var(--accent); stroke-width: 2.2; }
.d-ray { stroke: var(--warm); stroke-width: 2.2; }
.d-dot { fill: var(--warm); }
.d-curve { fill: none; stroke: var(--ink); stroke-width: 2.6; }
.g-roll { fill: var(--accent); opacity: 0.85; }
.g-train { fill: var(--warm); opacity: 0.85; }
.g-idle { fill: none; stroke: var(--ink-soft); stroke-width: 1.1; stroke-dasharray: 3 3; opacity: 0.7; }

.d-tick { fill: var(--ink-soft); font-family: var(--serif); font-size: 11px; }
.d-key { fill: var(--ink); font-family: var(--serif); font-size: 13px; font-weight: 700; }
.d-key.d-accent, .d-tick.d-accent { fill: var(--accent); }
.d-key.d-warm, .d-tick.d-warm { fill: var(--warm); }
.d-gridline { stroke: var(--line); stroke-width: 1; }
.d-guide { stroke: var(--ink-soft); stroke-width: 1; stroke-dasharray: 3 4; opacity: 0.8; }
.c-accent, .c-warm, .c-ink { fill: none; stroke-linecap: round; stroke-linejoin: round; }
.c-accent { stroke: var(--accent); }
.c-warm { stroke: var(--warm); }
.c-ink { stroke: var(--ink); stroke-width: 3.2; }
.c-thin { stroke-width: 1.8; }
.c-mid { stroke-width: 2.4; }
.c-band { fill: none; stroke: var(--ink); stroke-width: 9; stroke-linecap: round; stroke-linejoin: round; opacity: 0.12; }
.d-gap { fill: var(--panel); }
.c-dash { stroke-width: 1.5; stroke-dasharray: 5 5; opacity: 0.7; }
.d-star { fill: var(--warm); stroke: var(--panel); stroke-width: 2.5; }
.d-hoodarc { fill: none; stroke: var(--accent); stroke-width: 22; stroke-linecap: round; opacity: 0.16; }
.d-keep { fill: var(--accent-wash); }
.d-fiber { stroke: var(--accent); stroke-width: 4.5; stroke-linecap: round; }
.d-bar-warm { fill: var(--warm); opacity: 0.9; }
.d-thresh { stroke: var(--warm); stroke-width: 1.5; stroke-dasharray: 6 4; }
.d-arrow-thin { fill: none; stroke: var(--accent); stroke-width: 1.4; opacity: 0.7; }
.d-square { fill: var(--surface); stroke: var(--ink-soft); stroke-width: 1.2; }
.d-win { fill: var(--accent); opacity: 0.85; }
.d-win-warm { fill: var(--warm); opacity: 0.8; }
.tex { fill: var(--ink); }
.tex.t-warm { fill: var(--warm); }
.tex.t-accent { fill: var(--accent); }
.tex.t-soft { fill: var(--ink-soft); }
.g-edge { stroke: color-mix(in srgb, var(--accent) 30%, var(--panel)); stroke-width: 1.3; }
.g-edge-in { stroke: var(--accent); stroke-width: 2.4; }
.g-node { fill: color-mix(in srgb, var(--accent) 16%, var(--surface)); stroke: var(--accent); stroke-width: 1.6; }
.g-node-in { fill: var(--surface); stroke: var(--warm); stroke-width: 2.2; }
.g-node-i { fill: var(--warm); stroke: var(--surface); stroke-width: 2.5; }
.g-hood { fill: color-mix(in srgb, var(--warm) 12%, transparent); stroke: var(--warm); stroke-width: 2; stroke-dasharray: 7 6; }
.g-keep { fill: color-mix(in srgb, var(--warm) 9%, transparent); stroke: var(--warm); stroke-width: 1.5; stroke-dasharray: 6 5; }
.g-arrow { fill: none; stroke: var(--ink-soft); stroke-width: 1.3; }
.g-arrowhead { fill: var(--ink-soft); }
.d-dot-accent { fill: var(--accent); stroke: var(--panel); stroke-width: 1.5; }
.g-bubble { fill: var(--warm); opacity: 0.22; }

/* Figure animations: hooks are data-a attributes, the class .anim is set by script */
.anim [data-a] {
  animation-duration: 0.7s; animation-delay: var(--d, 0s); animation-fill-mode: both;
  animation-timing-function: cubic-bezier(0.2, 0.7, 0.2, 1); animation-play-state: paused;
}
.anim.is-in [data-a] { animation-play-state: running; }
.anim [data-a="fade"] { animation-name: a-fade; }
.anim [data-a="pop"] { animation-name: a-pop; animation-duration: 0.5s; animation-timing-function: cubic-bezier(0.34, 1.56, 0.64, 1); transform-box: fill-box; transform-origin: center; }
.anim [data-a="growx"] { animation-name: a-growx; transform-box: fill-box; transform-origin: left center; }
.anim [data-a="growy"] { animation-name: a-growy; transform-box: fill-box; transform-origin: center bottom; }
.anim [data-a="draw"] { stroke-dasharray: 1; animation-name: a-draw; animation-duration: 1.3s; animation-timing-function: ease-in-out; }
.calm .anim [data-a] { animation-name: a-fade; animation-duration: 0.6s; animation-timing-function: ease; }
.calm .anim [data-a="draw"] { stroke-dasharray: none; }
@media print { .anim [data-a] { animation: none !important; } .anim [data-a="draw"] { stroke-dasharray: none; } }
@keyframes a-fade { from { opacity: 0; } }
@keyframes a-pop { from { transform: scale(0); } }
@keyframes a-growx { from { transform: scaleX(0); } }
@keyframes a-growy { from { transform: scaleY(0); } }
@keyframes a-draw { from { stroke-dashoffset: 1; } }

/* Levine hats figure */
.levine-figure { margin: 0; }
.levine-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.75rem; }
.levine-tile { margin: 0; padding: 0.75rem 0.75rem 0.6rem; background: var(--panel); border: 1px solid var(--line); }
.levine-tile svg { display: block; width: 100%; height: auto; }
.levine-tile p { margin: 0.5rem 0 0; color: var(--ink-soft); font-size: 0.82rem; line-height: 1.45; text-align: center; }
.mask-frame { width: 72%; margin: 0.35rem auto 0; aspect-ratio: 1; background: #ffffff; border: 1px solid #15181b; }
.mask-tile { width: 100%; height: 100%; background: #15181b; -webkit-mask: var(--mask) center / 100% 100% no-repeat; mask: var(--mask) center / 100% 100% no-repeat; }
.h-black { fill: #15181b; stroke: var(--ink); stroke-width: 1.6; }
.h-white { fill: #fbfaf7; stroke: var(--ink); stroke-width: 1.6; }
.h-brim { fill: none; stroke: var(--ink); stroke-width: 1.6; stroke-linecap: round; }
.h-pick { fill: none; stroke: var(--warm); stroke-width: 2.6; }
.h-dots { stroke: var(--ink); stroke-width: 1.6; stroke-dasharray: 2 3; }
.h-tip { fill: none; stroke: var(--ink); stroke-width: 1.6; }
.h-head, .h-eye { fill: var(--surface); stroke: var(--ink); stroke-width: 1.8; }
.h-pupil { fill: var(--ink); }
.h-mouth { fill: var(--surface); stroke: var(--ink); stroke-width: 1.4; }
.h-bubble { fill: var(--surface); stroke: var(--ink); stroke-width: 1.6; }
.h-bubble-fill { fill: var(--surface); }
.h-say { fill: var(--ink); font-family: var(--serif); font-size: 18px; }

/* Lists: news, timeline, publications */
.timeline { list-style: none; margin: 0; padding: 0; }
.timeline li { display: grid; grid-template-columns: 150px 1fr; gap: 1.5rem; padding: 1.15rem 0; border-bottom: 1px solid var(--line); }
.timeline time, .timeline .when { color: var(--accent); font-size: 0.9rem; font-weight: 600; }
.timeline strong { display: block; font-size: 1.1rem; font-weight: 600; }
.timeline p { margin: 0.2rem 0 0; color: var(--ink-soft); }
.timeline p strong { display: inline; font-size: inherit; color: var(--ink); }
.two-col .timeline li { grid-template-columns: 96px 1fr; gap: 1rem; }
.timeline .where { color: var(--ink-soft); font-size: 0.92rem; }
.timeline ul { margin: 0.5rem 0 0; padding-left: 1.1rem; color: var(--ink-soft); }
.timeline ul li { display: list-item; padding: 0.15rem 0; border: 0; }

.two-col { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(2rem, 5vw, 4rem); }

.page-hero { padding-block: clamp(3rem, 6vw, 5rem) clamp(2rem, 4vw, 3rem); border-bottom: 1px solid var(--line); }
.page-hero h1 { margin: 0; font-size: clamp(2.3rem, 4.6vw, 3.6rem); font-weight: 600; line-height: 1.1; letter-spacing: -0.02em; }
.page-lede { max-width: 760px; margin: 1.1rem 0 0; color: var(--ink-soft); font-size: clamp(1.05rem, 1.7vw, 1.18rem); }

.pub-shell { max-width: 930px; }
.publication-group + .publication-group { margin-top: 3.5rem; }
.publication-group h2 { margin: 0 0 1rem; font-size: clamp(1.5rem, 2.4vw, 1.9rem); font-weight: 600; }
.publication-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ink); }
.publication-item { display: grid; grid-template-columns: 82px 1fr; gap: 1.5rem; padding: 1.6rem 0; border-bottom: 1px solid var(--line); }
.pub-year { color: var(--accent); font-size: 0.98rem; }
.publication-item h3 { margin: 0; font-size: clamp(1.12rem, 1.8vw, 1.28rem); font-weight: 600; line-height: 1.32; }
.publication-item h3 a { text-decoration-color: transparent; }
.publication-item h3 a:hover { text-decoration-color: currentColor; }
.pub-authors, .pub-venue { margin: 0.35rem 0 0; color: var(--ink-soft); font-size: 0.93rem; }
.pub-authors strong { color: var(--ink); }
.pub-venue em { color: var(--ink); font-style: italic; }
.badge { display: inline-block; margin-left: 0.4rem; padding: 0 0.5rem; border: 1px solid var(--accent); border-radius: 999px; color: var(--accent); font-size: 0.74rem; font-weight: 700; letter-spacing: 0.04em; vertical-align: 0.1em; }
.pub-abstract { margin: 0.6rem 0 0; color: var(--ink-soft); font-size: 0.95rem; }
.pub-links { display: flex; flex-wrap: wrap; gap: 0.3rem 1.1rem; margin-top: 0.6rem; font-size: 0.88rem; font-weight: 600; }
.footnote { margin-top: 1.2rem; color: var(--ink-soft); font-size: 0.86rem; }

.stat-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; margin-top: 1.5rem; }
.stat { padding: 1.1rem 1.2rem; border: 1px solid var(--line); background: var(--surface); }
.stat b { display: block; color: var(--accent); font-size: 1.9rem; font-weight: 600; line-height: 1.1; }
.stat span { color: var(--ink-soft); font-size: 0.9rem; }

/* Place band */
.place-band { position: relative; margin: 0; background: #1a1f2b; }
.place-band img { width: 100%; height: clamp(260px, 42vw, 560px); object-fit: cover; object-position: 50% 55%; }
.place-band::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to bottom, transparent 55%, rgba(10, 12, 18, 0.72)); pointer-events: none; }
.place-band figcaption { position: absolute; left: 0; right: 0; bottom: clamp(1rem, 3vw, 2rem); z-index: 1; display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 0.3rem 1.5rem; color: #fff; }
.place-name { font-size: clamp(1.1rem, 2.2vw, 1.5rem); font-weight: 600; text-shadow: 0 1px 12px rgba(0, 0, 0, 0.5); }
.place-credit { color: rgba(255, 255, 255, 0.72); font-size: 0.78rem; }
.place-credit a { color: inherit; }

/* Course notes */
.course-note { display: grid; grid-template-columns: 170px minmax(0, 1fr); gap: clamp(1.5rem, 4vw, 3rem); align-items: start; padding-top: 1.6rem; }
.course-note h3 { margin: 0; font-size: 1.3rem; font-weight: 600; line-height: 1.3; }
.course-note h3 a { text-decoration-color: transparent; }
.course-note h3 a:hover { text-decoration-color: currentColor; }
.course-note p { color: var(--ink-soft); }
.course-links { font-size: 0.92rem; font-weight: 600; }
.course-cover {
  display: block; aspect-ratio: 210 / 297; padding: 0; overflow: hidden;
  background: #fff; border: 1px solid var(--line); box-shadow: 0 10px 24px rgba(20, 30, 40, 0.10), 4px 4px 0 var(--paper-deep);
  color: var(--ink); text-decoration: none; transition: transform 200ms ease;
}
.course-cover:hover { transform: translateY(-3px); color: var(--ink); }
.course-cover img { display: block; width: 100%; height: 100%; object-fit: cover; }
.course-cover-title { font-size: 1rem; font-weight: 700; line-height: 1.25; }
.course-cover-sub { margin-top: 0.5rem; color: var(--ink-soft); font-size: 0.72rem; line-height: 1.35; }
.course-cover-author { margin-top: auto; color: var(--accent); font-size: 0.78rem; font-weight: 600; }

/* Selected readings carousel */
.shelf { position: relative; display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: clamp(0.5rem, 2vw, 1.5rem); margin-top: 2rem; outline: none; }
.shelf:focus-visible { outline: 2px solid var(--warm); outline-offset: 8px; }
.shelf-stage { display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; min-height: 290px; }
.shelf-stage.in-right { animation: shelf-in-right 420ms cubic-bezier(0.2, 0.7, 0.2, 1); }
.shelf-stage.in-left { animation: shelf-in-left 420ms cubic-bezier(0.2, 0.7, 0.2, 1); }
@keyframes shelf-in-right { from { opacity: 0; transform: translateX(28px); } }
@keyframes shelf-in-left { from { opacity: 0; transform: translateX(-28px); } }
.book-cover {
  display: block; width: 100%; height: auto; border-radius: 2px 4px 4px 2px;
  box-shadow: 0 14px 28px rgba(10, 15, 25, 0.18), 0 2px 6px rgba(10, 15, 25, 0.10);
}
.book {
  --h: var(--book-hue, 210);
  position: relative; display: flex; flex-direction: column; aspect-ratio: 2 / 3; padding: 1.3rem 1rem 1.1rem 1.5rem;
  background: linear-gradient(90deg, hsl(var(--h) 32% 22%) 0 9px, hsl(var(--h) 36% 30%) 9px 11px, hsl(var(--h) 34% 27%) 11px);
  color: #f5f1e8; border-radius: 2px 6px 6px 2px;
  box-shadow: 0 18px 30px rgba(10, 15, 25, 0.22), inset -2px 0 0 rgba(255, 255, 255, 0.06);
  transform: perspective(900px) rotateY(-8deg); transition: transform 300ms ease;
}
.book:hover { transform: perspective(900px) rotateY(0deg); }
.book-title { padding-bottom: 0.8rem; border-bottom: 1px solid rgba(245, 241, 232, 0.35); font-size: 1.12rem; font-weight: 700; line-height: 1.22; }
.book-author { margin-top: auto; font-size: 0.8rem; letter-spacing: 0.04em; opacity: 0.85; }
.book-count { margin: 0 0 0.4rem; color: var(--accent); font-size: 0.86rem; font-weight: 600; }
.book-name { margin: 0; font-size: clamp(1.3rem, 2.4vw, 1.6rem); font-weight: 600; line-height: 1.25; }
.book-by { margin: 0.3rem 0 0; color: var(--ink-soft); }
.book-note { margin: 1.1rem 0 0; padding-left: 1rem; border-left: 2px solid var(--warm); color: var(--ink); font-size: 1.05rem; line-height: 1.65; }
.shelf-arrow { display: grid; place-items: center; width: 44px; height: 44px; padding: 0; border: 1px solid var(--line); border-radius: 50%; background: var(--surface); color: var(--ink); cursor: pointer; transition: border-color 150ms ease, transform 150ms ease; }
.shelf-arrow:hover { border-color: var(--accent); color: var(--accent); }
.shelf-arrow:active { transform: scale(0.94); }
.shelf-arrow:focus-visible { outline: 2px solid var(--warm); outline-offset: 3px; }
.shelf-arrow svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.shelf-dots { grid-column: 1 / -1; display: flex; justify-content: center; gap: 0.5rem; margin-top: 0.6rem; }
.shelf-dots button { width: 8px; height: 8px; padding: 0; border: 0; border-radius: 50%; background: var(--line); cursor: pointer; }
.shelf-dots button[aria-selected="true"] { background: var(--accent); }
.shelf-stage:has(.paper-page) { grid-template-columns: 230px minmax(0, 1fr); }
.paper-page { border: 1px solid var(--line); border-radius: 0; background: #fff; }
.book-name a { color: inherit; text-decoration-color: transparent; }
.book-name a:hover { color: var(--accent); text-decoration-color: currentColor; }
.timeline-gap { margin-top: 1.5rem; border-top: 1px solid var(--line); }
@media (max-width: 640px) {
  .shelf { grid-template-columns: 1fr 1fr; }
  .shelf-stage { grid-column: 1 / -1; grid-row: 1; grid-template-columns: 1fr; justify-items: center; text-align: center; }
  .book, .book-cover { width: 150px; }
  .book-note { text-align: left; }
  .shelf-arrow.prev { justify-self: end; } .shelf-arrow.next { justify-self: start; }
  .course-note { grid-template-columns: 1fr; }
  .course-cover { width: 150px; }
}
@media (prefers-reduced-motion: reduce) { .shelf-stage.in-right, .shelf-stage.in-left { animation-name: a-fade; } }

/* Footer */
.site-footer { padding-block: 2.4rem; background: var(--footer); color: var(--footer-ink); }
.footer-grid { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 1.5rem 2rem; }
.footer-grid p { margin: 0; }
.footer-name { color: #fff; font-size: 1.25rem; font-weight: 700; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1rem; }
.footer-links a { color: #fff; font-size: 0.9rem; font-weight: 600; }
.footer-meta { font-size: 0.78rem; }

@media (max-width: 900px) {
  .profile-hero { grid-template-columns: 1fr; }
  .profile-aside { width: 180px; order: -1; margin: 0; }
  .research-topic { grid-template-columns: 1fr; gap: 0.6rem; }
  .topic-label p { position: static; }
  .home-paper { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .shell { width: calc(100% - 2rem); }
  .nav-shell { flex-direction: column; align-items: flex-start; gap: 0.6rem; padding-block: 1rem; min-height: 0; }
  .home-header .wordmark { display: none; }
  .timeline li, .publication-item { grid-template-columns: 1fr; gap: 0.3rem; }
  .stat-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }