/* ==========================================================================
   Pressbook — styles
   Sections: tokens · base · topbar · hero · toolbar · cards ·
             chips · footer · lightbox · motion / responsive
   ========================================================================== */

:root {
  --font-display: "Montserrat", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-serif: "Century Schoolbook", "New Century Schoolbook", "Century Schoolbook L", "C059", "TeX Gyre Schola", "Libre Baskerville", Georgia, serif;
  --font-body: "Montserrat", system-ui, -apple-system, "Segoe UI", sans-serif;

  --accent: #8b5cf6;      /* violet */
  --accent-2: #5b6cff;    /* periwinkle blue */
  --accent-3: #c27bff;    /* orchid */

  --radius: 22px;
  --ease: cubic-bezier(.22, 1, .36, 1);
  --ease-spring: cubic-bezier(.34, 1.56, .64, 1);
  --topbar-h: 68px;
}

/* night mode only */
:root {
  color-scheme: dark;
  --bg: #080b22;
  --bg-2: #0d1230;
  --ink: #eef0ff;
  --muted: #9aa2d6;
  --card: #121843;
  --card-2: #171e55;
  --line: rgba(165, 175, 255, .15);
  --line-strong: rgba(180, 190, 255, .30);
  --glass: rgba(8, 11, 34, .72);
  --shadow: 0 1px 0 rgba(190,200,255,.06) inset, 0 20px 50px -22px rgba(2,3,18,.85);
  --shadow-hover: 0 1px 0 rgba(190,200,255,.08) inset, 0 40px 80px -24px rgba(4,4,30,.95), 0 0 0 1px rgba(139,92,246,.25);
  --blob-op: .5;
  --grid-line: rgba(165,175,255,.05);
  --chip-bg: rgba(165,175,255,.08);
}

/* ───────── base ───────── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--topbar-h) + 12px); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  overflow-x: hidden;
  }
img { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; cursor: pointer; }
svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
::selection { background: var(--accent); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 8px; }

.skip { position: fixed; left: 12px; top: -60px; z-index: 100; background: var(--accent); color: #fff; padding: .6rem 1rem; border-radius: 10px; text-decoration: none; transition: top .2s; }
.skip:focus { top: 12px; }

/* scrollbar */
html { scrollbar-width: thin; scrollbar-color: var(--line-strong) transparent; }

/* neurons / synapses background */
.neural { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }
main, .footer { position: relative; z-index: 1; }

/* scroll progress */
.progress { position: fixed; inset: 0 0 auto 0; height: 3px; z-index: 60; pointer-events: none; }
.progress i { display: block; height: 100%; transform-origin: 0 50%; transform: scaleX(var(--p, 0)); background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3)); }

/* ───────── top bar ───────── */
.topbar {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 1.5rem;
  padding: 0 clamp(16px, 4vw, 48px);
  background: var(--glass);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid var(--line);
  transition: transform .45s var(--ease), background .5s;
}
.topbar.is-hidden { transform: translateY(-100%); }
.brand { display: flex; align-items: center; gap: .65rem; text-decoration: none; font-weight: 700; letter-spacing: .01em; }
.brand-mark {
  width: 22px; height: 22px; border-radius: 7px;
  background: conic-gradient(from 210deg, var(--accent), var(--accent-2), var(--accent-3), var(--accent));
  animation: spin 9s linear infinite;
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 18%, transparent);
}
.nav { display: flex; gap: .25rem; margin-left: auto; }
.nav a {
  position: relative; text-decoration: none; font-size: .88rem; font-weight: 600; color: var(--muted);
  padding: .5rem .8rem; border-radius: 999px; transition: color .25s;
}
.nav a::after { content: ""; position: absolute; left: .8rem; right: .8rem; bottom: .28rem; height: 2px; background: var(--accent); transform: scaleX(0); transform-origin: 0 50%; transition: transform .4s var(--ease); }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }
.nav a:hover::after, .nav a[aria-current="page"]::after { transform: scaleX(1); }
.tools { display: flex; gap: .5rem; }
.tool {
  min-width: 40px; height: 40px; padding: 0 .75rem; display: grid; place-items: center;
  background: var(--chip-bg); border: 1px solid var(--line); border-radius: 999px;
  font-size: .78rem; font-weight: 800; letter-spacing: .06em;
  transition: transform .3s var(--ease-spring), border-color .25s, background .25s;
}
.tool:hover { transform: translateY(-2px); border-color: var(--line-strong); }
.tool svg { width: 18px; height: 18px; }

/* ───────── hero ───────── */
.hero {
  position: relative; isolation: isolate;
  min-height: 100svh; padding: calc(var(--topbar-h) + 4rem) clamp(16px, 4vw, 48px) 5rem;
  display: grid; place-items: center; text-align: center; overflow: hidden;
}
.blobs { position: absolute; inset: 0; z-index: -1; pointer-events: none; }
.blob { position: absolute; border-radius: 50%; filter: blur(70px); opacity: var(--blob-op); will-change: transform; transform: translate3d(calc(var(--px, 0) * var(--k, 1) * 1px), calc(var(--py, 0) * var(--k, 1) * 1px), 0); transition: transform .8s var(--ease); }
.blob::after { content: ""; position: absolute; inset: 0; border-radius: inherit; background: inherit; animation: float 16s ease-in-out infinite alternate; }
.b1 { --k: -30; width: 46vmax; height: 46vmax; left: -12vmax; top: -14vmax; background: radial-gradient(circle at 30% 30%, var(--accent), transparent 68%); }
.b2 { --k: 40; width: 42vmax; height: 42vmax; right: -14vmax; top: 6vmax; background: radial-gradient(circle at 60% 40%, var(--accent-2), transparent 68%); }
.b2::after { animation-duration: 21s; animation-delay: -6s; }
.b3 { --k: -18; width: 34vmax; height: 34vmax; left: 28%; bottom: -20vmax; background: radial-gradient(circle, var(--accent-3), transparent 68%); }
.b3::after { animation-duration: 25s; animation-delay: -11s; }
.grid-lines {
  position: absolute; inset: 0;
  background-image: linear-gradient(var(--grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse at 50% 40%, #000 20%, transparent 72%);
          mask-image: radial-gradient(ellipse at 50% 40%, #000 20%, transparent 72%);
}
.hero-inner { max-width: 1050px; }
.eyebrow {
  display: inline-flex; align-items: center; justify-content: center; gap: .85rem; margin: 0 0 clamp(1.4rem, 3vw, 2.2rem); max-width: 100%;
  padding: clamp(.7rem, 1.6vw, 1rem) clamp(1.1rem, 2.6vw, 2rem) clamp(.7rem, 1.6vw, 1rem) clamp(1rem, 2.2vw, 1.6rem); border-radius: 999px;
  background: var(--chip-bg); border: 1px solid var(--line-strong);
  font-size: clamp(.82rem, 3.3vw, 1.6rem); font-weight: 800; letter-spacing: .14em; line-height: 1.25; text-transform: uppercase; color: var(--ink);
  box-shadow: 0 10px 40px -14px color-mix(in srgb, var(--accent) 55%, transparent);
}
@media (max-width: 560px) { .eyebrow { border-radius: 26px; letter-spacing: .1em; text-align: center; } }
.eyebrow .dot { flex: none; width: .55em; height: .55em; min-width: 9px; min-height: 9px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 0 var(--accent); animation: pulse 2.4s infinite; }
.hero-title {
  margin: 0; font-family: var(--font-serif); font-weight: 700;
  font-size: clamp(2.4rem, 8.6vw, 7rem); line-height: 1.04; letter-spacing: -.025em;
}
.hero-title.is-long { font-size: clamp(2.1rem, 6.6vw, 5.6rem); }
.hero-title .w { display: inline-block; overflow: hidden; vertical-align: top; padding: .06em .04em .14em; margin: -.06em -.04em -.14em; }
.hero-title .w > span { display: inline-block; transform: translateY(110%) rotate(4deg); transition: transform 1.1s var(--ease); transition-delay: calc(var(--i) * 110ms + 150ms); }
.is-ready .hero-title .w > span { transform: none; }
.hero-title .em { font-style: italic; font-weight: 400; background: linear-gradient(100deg, var(--accent), var(--accent-2) 55%, var(--accent-3)); background-size: 200% 100%; -webkit-background-clip: text; background-clip: text; color: transparent; animation: shimmer 7s linear infinite; padding-right: .08em; }
.cue { position: absolute; left: 50%; bottom: 1.8rem; width: 26px; height: 42px; margin-left: -13px; border: 1.5px solid var(--line-strong); border-radius: 14px; }
.cue span { position: absolute; left: 50%; top: 8px; width: 4px; height: 8px; margin-left: -2px; border-radius: 2px; background: var(--accent); animation: wheel 1.8s var(--ease) infinite; }

/* ───────── toolbar ───────── */
.gallery { max-width: 1480px; margin: 0 auto; padding: clamp(3rem, 7vw, 6rem) clamp(16px, 4vw, 48px) 6rem; }
.toolbar { display: flex; justify-content: center; margin-bottom: 2.6rem; }
.search { position: relative; flex: 0 1 420px; }
.search svg { position: absolute; left: 14px; top: 50%; width: 18px; height: 18px; margin-top: -9px; color: var(--muted); pointer-events: none; }
.search input {
  width: 100%; height: 44px; padding: 0 1rem 0 2.6rem; border-radius: 999px;
  background: color-mix(in srgb, var(--bg-2) 78%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border: 1px solid var(--line-strong); color: var(--ink); font: inherit; font-size: .92rem;
  transition: border-color .25s, box-shadow .25s, background .25s;
}
.search input::placeholder { color: var(--muted); }
.search input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 20%, transparent); }
.empty { text-align: center; color: var(--muted); padding: 4rem 0; font-family: var(--font-display); font-size: 1.2rem; font-weight: 500; }

/* ───────── groups (citations page) ───────── */
.group + .group { margin-top: clamp(3.5rem, 8vw, 6.5rem); }
.group-head { max-width: 62rem; margin: 0 auto clamp(1.6rem, 3.5vw, 2.6rem); text-align: center; }
.group-kicker { display: inline-flex; align-items: center; gap: .6rem; margin: 0 0 .9rem; padding: .4rem .95rem; border-radius: 999px; background: var(--chip-bg); border: 1px solid var(--line); font-size: .74rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: var(--accent-3); }
.group-title { margin: 0; font-family: var(--font-display); font-weight: 700; font-size: clamp(1.45rem, 3.6vw, 2.5rem); line-height: 1.12; letter-spacing: -.03em; text-wrap: balance; }
.group-title .y { font-weight: 400; color: var(--muted); letter-spacing: -.01em; }
.group-meta { margin: .8rem 0 0; font-size: clamp(.86rem, 1.5vw, 1rem); font-weight: 500; color: var(--muted); }
.group-meta strong { color: var(--ink); font-weight: 700; }
.group.is-empty { display: none; }

/* ───────── grid + cards ───────── */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 250px), 1fr)); gap: clamp(14px, 1.8vw, 26px); perspective: 1400px; }

.card {
  --rx: 0deg; --ry: 0deg; --mx: 50%; --my: 50%;
  position: relative; display: flex; flex-direction: column;
  transform: translateY(0) rotateX(var(--rx)) rotateY(var(--ry));
  transform-style: preserve-3d;
  transition: transform .6s var(--ease);
}
.card.is-tilting { transition: transform .12s linear; }
.card-media {
  position: relative; display: block; width: 100%; aspect-ratio: var(--thumb-ratio, 1 / 1); padding: 0; overflow: hidden;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
  cursor: zoom-in; isolation: isolate; transition: box-shadow .5s var(--ease), border-color .4s;
}
.card:hover .card-media { box-shadow: var(--shadow-hover); border-color: var(--line-strong); }
@property --ang { syntax: "<angle>"; initial-value: 0deg; inherits: false; }
/* animated gradient ring on hover (image only) */
.card-media::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 2px; pointer-events: none; z-index: 3;
  background: conic-gradient(from var(--ang, 0deg), var(--accent), var(--accent-2), var(--accent-3), var(--accent));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor;
          mask: linear-gradient(#000 0 0) content-box exclude, linear-gradient(#000 0 0);
  opacity: 0; transition: opacity .5s; animation: ring 6s linear infinite;
}
.card:hover .card-media::before, .card-media:focus-visible::before { opacity: 1; }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.1s var(--ease), filter .6s, opacity .6s; opacity: 0; }
.card-media img.is-loaded { opacity: 1; }
.card:hover .card-media img { transform: scale(1.07); }
.card-media::after { /* glare following the pointer */
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: radial-gradient(420px circle at var(--mx) var(--my), rgba(255,255,255,.55), transparent 42%);
  mix-blend-mode: soft-light; opacity: 0; transition: opacity .4s;
}
.card:hover .card-media::after { opacity: 1; }
.card-media .shine { position: absolute; inset: 0; z-index: 1; pointer-events: none; background: linear-gradient(105deg, transparent 40%, rgba(255,255,255,.7) 50%, transparent 60%); transform: translateX(-120%); }
.card:hover .card-media .shine { transform: translateX(120%); transition: transform 1s var(--ease); }
.open-hint {
  position: absolute; z-index: 2; left: 50%; bottom: 14px; display: inline-flex; align-items: center; gap: .5rem;
  padding: .55rem .95rem; border-radius: 999px; font-size: .78rem; font-weight: 800; letter-spacing: .04em; white-space: nowrap;
  color: #fff; background: rgba(9, 12, 38, .82); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  transform: translate(-50%, 140%); opacity: 0; transition: transform .55s var(--ease), opacity .4s;
}
.open-hint svg { width: 15px; height: 15px; }
.card:hover .open-hint, .card-media:focus-visible .open-hint { transform: translate(-50%, 0); opacity: 1; }
.card-media:focus-visible { outline-offset: 4px; }

.card-body { display: flex; flex-direction: column; align-items: center; padding: 1rem .25rem 0; flex: 1; }
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

/* ───────── link buttons (chips) ───────── */
.links { display: flex; flex-wrap: wrap; justify-content: center; gap: .55rem; }
.chip {
  --c: var(--accent);
  position: relative; display: inline-flex; align-items: center; gap: .5rem; overflow: hidden;
  padding: .5rem .85rem .5rem .7rem; border-radius: 999px; text-decoration: none;
  font-size: .62rem; font-weight: 500; letter-spacing: .12em; text-transform: uppercase; line-height: 1;
  color: var(--ink); background: var(--chip-bg); border: 1px solid var(--line);
  transition: color .3s, border-color .3s, transform .35s var(--ease-spring);
  isolation: isolate;
}
.chip::before { content: ""; position: absolute; inset: 0; z-index: -1; background: var(--c); transform: translateY(101%); transition: transform .45s var(--ease); border-radius: inherit; }
.chip:hover { color: #fff; border-color: transparent; transform: translateY(-2px); }
.chip:hover::before { transform: none; }
.chip svg { width: 20px; height: 20px; flex: none; transition: transform .4s var(--ease-spring); }
.chip:hover svg { transform: rotate(-8deg) scale(1.15); }
.chip .ext { width: 10px; height: 10px; opacity: .55; margin-left: .1rem; }
button.chip { font-family: inherit; cursor: pointer; }
.chip--view { --c: var(--accent); }

/* ───────── footer ───────── */
.footer { border-top: 1px solid var(--line); background: color-mix(in srgb, var(--bg-2) 72%, transparent); }
.footer-in { max-width: 1480px; margin: 0 auto; padding: 2.4rem clamp(16px, 4vw, 48px); display: flex; flex-wrap: wrap; align-items: center; gap: 1.2rem 2rem; }
.footer-name { margin: 0; font-family: var(--font-display); font-size: 1.15rem; font-weight: 700; letter-spacing: -.01em; }
.footer-name em { color: var(--muted); font-weight: 300; }
.socials { display: flex; flex-wrap: wrap; gap: .5rem; margin-left: auto; }
.socials a { text-decoration: none; font-size: .82rem; font-weight: 700; padding: .5rem .9rem; border-radius: 999px; background: var(--chip-bg); border: 1px solid var(--line); transition: background .3s, color .3s, transform .3s var(--ease-spring); }
.socials a:hover { background: var(--accent); color: #fff; transform: translateY(-2px); }
.totop { font-size: .82rem; font-weight: 800; text-decoration: none; color: var(--muted); }
.totop:hover { color: var(--accent); }

/* ───────── scroll reveal ───────── */
.reveal { opacity: 0; transform: translateY(30px) scale(.985); transition: opacity .9s var(--ease), transform 1s var(--ease); transition-delay: var(--d, 0s); }
.reveal.in, .is-ready .hero .reveal { opacity: 1; transform: none; }
.card.reveal { transition: opacity .9s var(--ease) var(--d, 0s), transform .6s var(--ease); }
.card.reveal:not(.in) { transform: translateY(46px) scale(.97); }
.card.reveal.in { transform: translateY(0) rotateX(var(--rx)) rotateY(var(--ry)); }
.card.reveal.in.is-tilting { transition: opacity .9s var(--ease) var(--d, 0s), transform .12s linear; }
.card.is-filtered-out { display: none; }

/* ═════════════════ LIGHTBOX ═════════════════ */
.lb { position: fixed; inset: 0; z-index: 200; display: grid; grid-template-columns: minmax(0, 1fr); grid-template-rows: auto minmax(0, 1fr) auto; color: #fff; --lb-pad: clamp(10px, 2.5vw, 28px); }
.lb[hidden] { display: none; }
.lb-backdrop { position: absolute; inset: 0; background: rgba(5, 7, 26, .88); backdrop-filter: blur(22px) saturate(1.2); -webkit-backdrop-filter: blur(22px) saturate(1.2); opacity: 0; transition: opacity .45s var(--ease); }
.lb.is-open .lb-backdrop { opacity: 1; }

.lb-top, .lb-bottom { position: relative; z-index: 3; display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: var(--lb-pad); opacity: 0; transition: opacity .5s var(--ease), transform .6s var(--ease); }
.lb-top { transform: translateY(-14px); }
.lb-bottom { transform: translateY(14px); justify-content: center; flex-wrap: wrap; padding-top: 0; }
.lb.is-open .lb-top, .lb.is-open .lb-bottom { opacity: 1; transform: none; transition-delay: .12s; }
.lb-id { display: flex; align-items: center; gap: .9rem; min-width: 0; }
.lb-count { font-variant-numeric: tabular-nums; font-size: .78rem; font-weight: 800; letter-spacing: .12em; padding: .45rem .7rem; border-radius: 999px; background: rgba(255,255,255,.1); white-space: nowrap; }
.lb-titles { min-width: 0; }
.lb-titles h2 { margin: 0; font-family: var(--font-display); font-weight: 600; letter-spacing: -.01em; font-size: clamp(1.05rem, 2vw, 1.5rem); line-height: 1.15; display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.lb-titles p { margin: .1rem 0 0; font-size: .8rem; color: rgba(255,255,255,.62); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lb-actions { display: flex; gap: .45rem; flex: none; }
.lb-btn { display: grid; place-items: center; min-width: 42px; height: 42px; padding: 0; border-radius: 50%; border: 1px solid rgba(255,255,255,.16); background: rgba(255,255,255,.08); color: #fff; text-decoration: none; transition: background .3s, transform .35s var(--ease-spring), border-color .3s; }
.lb-btn svg { width: 19px; height: 19px; }
.lb-btn:hover { background: rgba(255,255,255,.2); transform: translateY(-2px); border-color: rgba(255,255,255,.4); }
.lb-close:hover { background: var(--accent); border-color: transparent; transform: rotate(90deg); }
.lb-reset { width: auto; padding: 0 .85rem; border-radius: 999px; font-size: .76rem; font-weight: 800; font-variant-numeric: tabular-nums; letter-spacing: .04em; }

.lb-stage { position: relative; z-index: 2; display: grid; grid-template: minmax(0, 1fr) / minmax(0, 1fr); place-items: center; min-height: 0; overflow: hidden; padding: 0 clamp(8px, 7vw, 110px); touch-action: none; user-select: none; -webkit-user-select: none; }
.lb-figure { margin: 0; display: grid; place-items: center; will-change: transform, opacity; max-width: 100%; max-height: 100%; }
.lb-figure.is-tall { height: 100%; grid-template-rows: minmax(0, 1fr); }
.lb-img {
  max-width: 100%; max-height: calc(100svh - 190px); width: auto; height: auto; border-radius: 10px;
  background: #fff; box-shadow: 0 50px 120px -20px rgba(0,0,0,.8), 0 0 0 1px rgba(255,255,255,.08);
  transform: translate3d(var(--tx, 0px), var(--ty, 0px), 0) scale(var(--s, 1)); transform-origin: 50% 50%;
  cursor: zoom-in; opacity: 0; transition: opacity .35s;
}
.lb-img.is-ready { opacity: 1; }
.lb-img.is-zoomed { cursor: grab; }
.lb-img.is-dragging, .lb-img.is-anim { will-change: transform; }
.lb-img.is-dragging { cursor: grabbing; transition: opacity .35s; }
.lb-img.is-anim { transition: opacity .35s, transform .45s var(--ease); }
.lb-spinner { position: absolute; width: 38px; height: 38px; border-radius: 50%; border: 3px solid rgba(255,255,255,.18); border-top-color: var(--accent); animation: spin .8s linear infinite; opacity: 0; transition: opacity .3s; }
.lb-spinner.on { opacity: 1; }

.lb-nav { position: absolute; z-index: 4; top: 50%; width: 52px; height: 52px; margin-top: -26px; display: grid; place-items: center; padding: 0; border-radius: 50%; border: 1px solid rgba(255,255,255,.16); background: rgba(255,255,255,.08); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); color: #fff; opacity: 0; transition: opacity .5s, background .3s, transform .4s var(--ease-spring); }
.lb.is-open .lb-nav { opacity: 1; transition-delay: .2s; }
.lb-prev { left: clamp(8px, 2vw, 28px); } .lb-next { right: clamp(8px, 2vw, 28px); }
.lb-nav svg { width: 22px; height: 22px; }
.lb-nav:hover { background: var(--accent); transform: scale(1.1); }
.lb-nav:disabled { opacity: .25 !important; pointer-events: none; }

.lb-links { display: flex; flex-wrap: wrap; justify-content: center; gap: .5rem; }
.lb-links .chip { padding: .6rem 1rem .6rem .8rem; font-size: .82rem; color: #fff; background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.16); }
.lb-links .chip svg { width: 16px; height: 16px; }
.lb-pages { display: flex; gap: .4rem; margin-right: .6rem; }
.lb-pages button { width: 34px; height: 34px; border-radius: 50%; border: 1px solid rgba(255,255,255,.2); background: rgba(255,255,255,.08); color: #fff; font-size: .78rem; font-weight: 800; transition: background .3s, transform .3s var(--ease-spring); }
.lb-pages button[aria-current="true"] { background: #fff; color: #111; }
.lb-pages button:hover { transform: translateY(-2px); }

/* ───────── keyframes ───────── */
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes float { 0% { transform: translate3d(0,0,0) scale(1); } 50% { transform: translate3d(5%,-6%,0) scale(1.08); } 100% { transform: translate3d(-6%,5%,0) scale(.95); } }
@keyframes pulse { 70% { box-shadow: 0 0 0 9px transparent; } 100% { box-shadow: 0 0 0 0 transparent; } }
@keyframes shimmer { to { background-position: -200% 0; } }
@keyframes wheel { 0% { transform: translateY(0); opacity: 1; } 70% { transform: translateY(14px); opacity: 0; } 100% { opacity: 0; } }
@keyframes ring { to { --ang: 360deg; } }

/* ───────── responsive ───────── */
@media (max-width: 860px) {
  .tools { margin-left: auto; }
  .search { flex: 1 1 100%; }
  }
@media (max-width: 560px) {
  :root { --radius: 14px; }
  .grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
  .card-body { padding: .6rem 0 0; }
  .links { gap: 5px; }
  /* compact icon-only buttons in the grid (labels stay available to screen readers + tooltips) */
  .card .chip { width: 36px; height: 36px; padding: 0; justify-content: center; border-radius: 50%; }
  .card .chip span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .card .chip svg { width: 20px; height: 20px; }
  .card .chip .ext { display: none; }
  .open-hint { display: none; }
  .lb-nav { top: auto; bottom: 74px; margin: 0; width: 46px; height: 46px; }
  .lb-stage { padding: 0 6px; }
  .lb-reset, #lbZoomOut, #lbZoomIn { display: none; }
  .lb-img { max-height: calc(100svh - 210px); }
  .lb-bottom { padding-inline: 68px; padding-bottom: 14px; }
  .lb-nav { bottom: 14px; }
}
@media (hover: none) {
  .card:hover { box-shadow: var(--shadow); }
  .card:hover .card-media img { transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; transition-delay: 0s !important; }
  .reveal, .card.reveal:not(.in), .hero-title .w > span { opacity: 1; transform: none; }
}

/* ═════════════════ MENU: drop-down + phone panel ═════════════════ */
.tool-menu { display: none; }
.tool-menu svg { width: 22px; height: 22px; }
.tool-menu path { transform-box: fill-box; transform-origin: center; transition: transform .4s var(--ease), opacity .25s; }
body.menu-open .tool-menu .l1 { transform: translateY(5px) rotate(45deg); }
body.menu-open .tool-menu .l2 { opacity: 0; }
body.menu-open .tool-menu .l3 { transform: translateY(-5px) rotate(-45deg); }
.dd { position: relative; }
.dd-btn { display: inline-flex; align-items: center; gap: .35rem; font: inherit; font-size: .88rem; font-weight: 600; color: var(--muted); background: none; border: 0; padding: .5rem .8rem; border-radius: 999px; transition: color .25s; }
.dd-btn svg { width: 14px; height: 14px; transition: transform .3s var(--ease); }
.dd:hover .dd-btn, .dd.is-open .dd-btn, .dd:focus-within .dd-btn { color: var(--ink); }
.dd:hover .dd-btn svg, .dd.is-open .dd-btn svg { transform: rotate(180deg); }
.dd-menu {
  position: absolute; top: 100%; right: 0; min-width: 270px; padding: .5rem;
  background: color-mix(in srgb, var(--bg-2) 94%, transparent); border: 1px solid var(--line-strong); border-radius: 16px;
  box-shadow: var(--shadow-hover); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  opacity: 0; visibility: hidden; transform: translateY(-6px); transition: opacity .25s, transform .35s var(--ease), visibility .25s;
}
.dd:hover .dd-menu, .dd.is-open .dd-menu, .dd:focus-within .dd-menu { opacity: 1; visibility: visible; transform: none; }
.nav .dd-menu a { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .65rem .85rem; border-radius: 10px; font-size: .85rem; color: var(--ink); }
.nav .dd-menu a::after { display: none; }
.nav .dd-menu a:hover { background: var(--chip-bg); }
.dd-menu .ext { width: 12px; height: 12px; opacity: .5; flex: none; }
@media (max-width: 860px) {
  .tool-menu { display: grid; }
  .nav {
    position: absolute; top: 100%; left: 0; right: 0; margin: 0; display: flex; flex-direction: column; align-items: stretch; gap: .1rem;
    padding: .6rem clamp(16px, 4vw, 48px) 1.2rem; max-height: calc(100svh - var(--topbar-h)); overflow: auto;
    background: var(--bg); border-bottom: 1px solid var(--line); box-shadow: 0 30px 50px -20px rgba(2,3,18,.8);
    opacity: 0; visibility: hidden; transform: translateY(-10px); transition: opacity .3s, transform .45s var(--ease), visibility .3s;
  }
  body.menu-open .nav { opacity: 1; visibility: visible; transform: none; }
  .nav > a { padding: .9rem .6rem; font-size: 1rem; border-radius: 12px; }
  .nav > a::after { display: none; }
  .nav > a[aria-current="page"] { background: var(--chip-bg); }
  .dd-btn { width: 100%; justify-content: space-between; padding: .9rem .6rem; font-size: 1rem; }
  .dd-btn svg { display: none; }
  .dd-menu { position: static; opacity: 1; visibility: visible; transform: none; min-width: 0; box-shadow: none; background: none; border: 0; border-left: 2px solid var(--line-strong); border-radius: 0; margin: 0 0 .5rem .6rem; padding: 0 0 0 .4rem; backdrop-filter: none; -webkit-backdrop-filter: none; }
  .nav .dd-menu a { font-size: .95rem; color: var(--muted); }
}

/* ═════════════════ PUBLICATIONS: 2 big columns, no cropping, zoom-only buttons ═════════════════ */
.cols-2 .gallery { max-width: 1180px; }
.cols-2 .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(12px, 2.4vw, 34px); align-items: start; }
.is-natural .card-media { aspect-ratio: auto; }
.is-natural .card-media img { height: auto; object-fit: contain; }
.chip--icon { width: 46px; height: 46px; padding: 0; justify-content: center; border-radius: 50%; }
.chip--icon svg { width: 24px; height: 24px; }
.cols-2 .open-hint { padding: .7rem; }
.cols-2 .open-hint svg { width: 22px; height: 22px; }
@media (max-width: 560px) {
  .cols-2 .grid { gap: 12px; }
  .cols-2 .card .chip { width: 42px; height: 42px; }
  .cols-2 .card .chip svg { width: 22px; height: 22px; }
}

/* ═════════════════ HOME ═════════════════ */
.btn { display: inline-flex; align-items: center; gap: .6rem; padding: .85rem 1.35rem; border-radius: 999px; text-decoration: none; font-size: .72rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--ink); background: var(--chip-bg); border: 1px solid var(--line-strong); transition: transform .35s var(--ease-spring), box-shadow .35s, border-color .3s; }
.btn:hover { transform: translateY(-3px); border-color: var(--accent); box-shadow: 0 14px 34px -14px color-mix(in srgb, var(--accent) 80%, transparent); }
.btn svg { width: 18px; height: 18px; }
.btn--primary { color: #fff; border-color: transparent; background: linear-gradient(100deg, var(--accent), var(--accent-2)); }
.hero--home .hero-title { font-size: clamp(3.4rem, 13vw, 9.5rem); }
.hero-lede { margin: clamp(1.2rem, 3vw, 2rem) auto 0; max-width: 44rem; font-size: clamp(1rem, 2vw, 1.28rem); line-height: 1.6; color: var(--muted); }
.hero-lede strong { color: var(--ink); font-weight: 600; }
.hero-cta { display: flex; flex-wrap: wrap; justify-content: center; gap: .75rem; margin-top: clamp(1.4rem, 3vw, 2.2rem); }

.section, .other { text-shadow: 0 0 14px var(--bg), 0 0 5px var(--bg); }
.section { position: relative; max-width: 1180px; margin: 0 auto; padding: clamp(3.2rem, 8vw, 6.2rem) clamp(16px, 4vw, 48px); }
.sec-head { margin-bottom: clamp(1.8rem, 4vw, 3rem); }
.sec-kicker { display: inline-flex; align-items: center; gap: .6rem; margin: 0 0 1rem; padding: .4rem .95rem; border-radius: 999px; background: var(--chip-bg); border: 1px solid var(--line); font-size: .72rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--accent-3); }
.sec-title { margin: 0; font-family: var(--font-serif); font-weight: 700; font-size: clamp(1.8rem, 4.6vw, 3.2rem); line-height: 1.1; letter-spacing: -.02em; text-wrap: balance; }
.sec-title em { font-weight: 400; background: linear-gradient(100deg, var(--accent), var(--accent-2) 55%, var(--accent-3)); -webkit-background-clip: text; background-clip: text; color: transparent; padding-right: .06em; }
.sec-lede { margin: 1rem 0 0; max-width: 46rem; color: var(--muted); font-size: clamp(1rem, 1.6vw, 1.12rem); }
.panel { background: color-mix(in srgb, var(--card) 62%, transparent); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }

/* about */
.about { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: clamp(1.5rem, 4vw, 3.5rem); align-items: start; }
.about p { margin: 0 0 1rem; color: var(--muted); font-size: clamp(1rem, 1.5vw, 1.08rem); }
.about p strong { color: var(--ink); font-weight: 600; }
.focus { margin-top: 1.6rem; padding: 1.4rem 1.5rem; position: relative; overflow: hidden; }
.focus::before { content: ""; position: absolute; inset: 0; background: radial-gradient(120% 140% at 0% 0%, color-mix(in srgb, var(--accent) 28%, transparent), transparent 60%); pointer-events: none; }
.focus small { position: relative; display: block; font-size: .7rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--accent-3); }
.focus b { position: relative; display: block; margin-top: .3rem; font-family: var(--font-serif); font-size: clamp(1.6rem, 3.4vw, 2.3rem); font-weight: 700; letter-spacing: -.02em; }
.focus span { position: relative; display: block; margin-top: .35rem; color: var(--muted); font-size: .92rem; }
.degrees { display: grid; gap: 1rem; }
.degree { display: flex; gap: 1rem; align-items: flex-start; padding: 1.25rem 1.3rem; }
.degree svg { flex: none; width: 34px; height: 34px; color: var(--accent-3); }
.degree h3 { margin: 0; font-size: 1.02rem; font-weight: 700; line-height: 1.3; }
.degree p { margin: .3rem 0 0; font-size: .88rem; color: var(--muted); }
.ribbon { display: block; width: 100%; margin-top: clamp(2rem, 5vw, 3.4rem); padding: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; cursor: zoom-in; position: relative; box-shadow: var(--shadow); background: #000; }
.ribbon img { width: 100%; height: auto; transition: transform 1.2s var(--ease), filter .6s; filter: saturate(.9) brightness(.92); }
.ribbon:hover img { transform: scale(1.025); filter: none; }
.ribbon figcaption, .ribbon .cap { position: absolute; left: 0; right: 0; bottom: 0; padding: 1.6rem 1.2rem .8rem; text-align: left; font-size: .68rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: rgba(255,255,255,.85); background: linear-gradient(0deg, rgba(5,7,26,.85), transparent); }

/* expertise */
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 330px), 1fr)); gap: clamp(12px, 1.8vw, 22px); }
.tile { position: relative; padding: 1.5rem 1.5rem 1.6rem; transition: transform .5s var(--ease), border-color .4s, box-shadow .5s var(--ease); }
.tile:hover { transform: translateY(-5px); border-color: var(--line-strong); box-shadow: var(--shadow-hover); }
.tile i { font-style: normal; display: block; font-family: var(--font-serif); font-size: 1.1rem; color: var(--accent-3); margin-bottom: .8rem; }
.tile h3 { margin: 0 0 .5rem; font-size: 1.08rem; font-weight: 700; line-height: 1.25; }
.tile p { margin: 0; font-size: .92rem; color: var(--muted); }
.tile.is-focus { border-color: color-mix(in srgb, var(--accent) 60%, transparent); }
.tile.is-focus i::after { content: "  ·  current focus"; font-family: var(--font-body); font-size: .62rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--ink); }

/* affiliations */
.aff { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr)); gap: clamp(12px, 1.8vw, 20px); }
.aff a { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .9rem; min-height: 190px; padding: 1.4rem 1rem; text-align: center; text-decoration: none; transition: transform .5s var(--ease), border-color .4s; }
.aff a:hover { transform: translateY(-5px); border-color: var(--accent); }
.aff img { width: auto; height: 62px; max-width: 100%; object-fit: contain; }
.aff .wordmark { font-family: var(--font-serif); font-size: 1.5rem; font-weight: 700; line-height: 1.1; letter-spacing: -.01em; }
.aff small { font-size: .68rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); line-height: 1.5; }

/* research projects */
.project { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr); gap: clamp(1.5rem, 4.5vw, 4rem); align-items: center; }
.project + .project { margin-top: clamp(3.5rem, 8vw, 6.5rem); }
.project--flip .project-media { order: 2; }
.pmedia { position: relative; display: block; width: 100%; padding: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #fff; box-shadow: var(--shadow); cursor: zoom-in; isolation: isolate; transition: box-shadow .5s var(--ease), border-color .4s; }
.pmedia img { width: 100%; height: auto; transition: transform 1.1s var(--ease); }
.pmedia:hover img { transform: scale(1.03); }
.pmedia:hover { box-shadow: var(--shadow-hover); border-color: var(--line-strong); }
.pmedia::before { content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 2px; pointer-events: none; z-index: 3; background: conic-gradient(from var(--ang, 0deg), var(--accent), var(--accent-2), var(--accent-3), var(--accent)); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask: linear-gradient(#000 0 0) content-box exclude, linear-gradient(#000 0 0); opacity: 0; transition: opacity .5s; animation: ring 6s linear infinite; }
.pmedia:hover::before, .pmedia:focus-visible::before { opacity: 1; }
.zoom-badge { position: absolute; z-index: 2; right: 12px; bottom: 12px; width: 44px; height: 44px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: rgba(9, 12, 38, .82); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
.zoom-badge svg { width: 22px; height: 22px; }
.media-sub { display: flex; align-items: center; gap: 1rem; margin-top: 1rem; }
.media-sub .pmedia { width: 112px; flex: none; border-radius: 14px; }
.media-sub .zoom-badge { width: 30px; height: 30px; right: 6px; bottom: 6px; }
.media-sub .zoom-badge svg { width: 16px; height: 16px; }
.media-sub p { margin: 0; font-size: .78rem; color: var(--muted); line-height: 1.5; }
.ptag { margin: 0 0 .8rem; font-size: .7rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--accent-3); }
.ptitle { margin: 0; font-family: var(--font-serif); font-size: clamp(1.9rem, 4.2vw, 3rem); font-weight: 700; line-height: 1.05; letter-spacing: -.02em; }
.psub { margin: .55rem 0 0; font-size: clamp(.95rem, 1.5vw, 1.1rem); font-weight: 500; color: var(--ink); }
.project-text p { margin: 1rem 0 0; color: var(--muted); font-size: .98rem; }
.project-text p strong { color: var(--ink); font-weight: 600; }
.project-text .links { justify-content: flex-start; margin-top: 1.4rem; }
.hexcloud { position: relative; padding: clamp(1.2rem, 3vw, 2rem); display: flex; flex-wrap: wrap; gap: .5rem; align-content: flex-start; overflow: hidden; }
.hexcloud::before { content: ""; position: absolute; inset: 0; background: radial-gradient(90% 70% at 100% 0%, color-mix(in srgb, var(--accent-2) 26%, transparent), transparent 60%); pointer-events: none; }
.hexcloud .stat { position: relative; flex: 0 0 100%; margin-bottom: .6rem; display: flex; align-items: baseline; gap: .8rem; }
.hexcloud .stat b { font-family: var(--font-serif); font-size: clamp(3rem, 8vw, 5rem); line-height: 1; font-weight: 700; background: linear-gradient(100deg, var(--accent), var(--accent-3)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hexcloud .stat span { font-size: .72rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
.hexcloud em { position: relative; font-style: normal; font-size: .68rem; font-weight: 600; letter-spacing: .08em; padding: .42rem .65rem; border-radius: 10px; border: 1px solid var(--line-strong); background: var(--chip-bg); color: var(--ink); transition: background .3s, color .3s, transform .3s var(--ease-spring); }
.hexcloud em:nth-of-type(5n+1) { border-color: color-mix(in srgb, var(--accent) 70%, transparent); }
.hexcloud em:nth-of-type(7n+3) { border-color: color-mix(in srgb, var(--accent-2) 70%, transparent); }
.hexcloud em:hover { background: var(--accent); color: #fff; transform: translateY(-2px); }

/* other areas (small print) */
.other { max-width: 1180px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 48px) clamp(3rem, 6vw, 4.5rem); }
.other-in { border-top: 1px solid var(--line); padding-top: 1.6rem; font-size: .8rem; line-height: 1.7; color: var(--muted); }
.other h2 { margin: 0 0 .6rem; font-size: .66rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--accent-3); }
.other ul { margin: 0; padding: 0; list-style: none; display: grid; gap: .45rem; }
.other li::before { content: "◆"; font-size: .55em; margin-right: .6rem; color: var(--accent); vertical-align: .15em; }
.other a { color: var(--ink); text-underline-offset: 3px; text-decoration-color: var(--line-strong); }
.other a:hover { text-decoration-color: var(--accent); }

@media (max-width: 860px) {
  .about, .project { grid-template-columns: minmax(0, 1fr); }
  .project--flip .project-media { order: 0; }
}
@media (max-width: 560px) {
  .btn { padding: .8rem 1.1rem; }
  .aff a { min-height: 150px; }
  .tile { padding: 1.25rem; }
}