:root {
  --bg: #fbf9f5;
  --bg-alt: #f2ede4;
  --ink: #1c2230;
  --ink-soft: #55606f;
  --accent: #0e7c72;
  --accent-soft: #dcf1ee;
  --coral: #f0603f;
  --coral-soft: #fde5df;
  --gold: #f2a33c;
  --violet: #6d5ae0;
  --violet-soft: #ece7fb;
  --grad: linear-gradient(120deg, #0e7c72 0%, #6d5ae0 55%, #f0603f 100%);
  --rule: #e2dacb;
  --card: #fff;
  --serif: "Source Serif 4", Georgia, serif;
  --sans: "Inter", -apple-system, "Segoe UI", sans-serif;
  --maxw: 1060px;
  --header-height: 72px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: var(--sans); font-size: 16.5px; line-height: 1.65; color: var(--ink); background: var(--bg); }
h1, h2, h3 { font-family: var(--serif); line-height: 1.18; margin: 0 0 .55em; }
a { color: var(--accent); }
p { margin: 0 0 1em; }
section[id] { scroll-margin-top: calc(var(--header-height) + 1rem); }

.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 100; padding: .7rem 1rem; border-radius: 8px; background: var(--ink); color: white; text-decoration: none; }
.skip-link:focus { top: 1rem; }
:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; }

.site-header { position: sticky; top: 0; z-index: 50; background: rgba(250,247,242,.94); backdrop-filter: blur(9px); border-bottom: 1px solid var(--rule); }
.nav { max-width: var(--maxw); min-height: var(--header-height); margin: 0 auto; padding: .75rem 1.25rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.nav-brand { font-family: var(--serif); font-weight: 700; font-size: 1.18rem; color: var(--ink); text-decoration: none; white-space: nowrap; }
.nav-links { display: flex; align-items: center; gap: 1.05rem; list-style: none; margin: 0; padding: 0; }
.nav-links a { color: var(--ink-soft); text-decoration: none; font-size: .9rem; font-weight: 600; }
.nav-links a:hover { color: var(--accent); }
.nav-links a.nav-cv { color: var(--accent); border: 1.5px solid var(--accent); border-radius: 7px; padding: .25rem .65rem; }
.nav-links a.nav-cv:hover { background: var(--accent); color: white; }
.nav-toggle { display: none; background: transparent; border: 1px solid var(--rule); border-radius: 7px; font-size: 1.2rem; padding: .3rem .65rem; cursor: pointer; color: var(--ink); }

.hero { padding: 6rem 1.25rem 5rem; position: relative; overflow: hidden; background: radial-gradient(900px 460px at 12% -5%, var(--coral-soft), transparent 60%), radial-gradient(1000px 520px at 88% 0%, var(--accent-soft), transparent 62%), radial-gradient(700px 420px at 60% 120%, var(--violet-soft), transparent 60%), var(--bg); }
.hero::before { content: ""; position: absolute; inset: auto 0 0; height: 5px; background: var(--grad); }
.hero-inner { max-width: var(--maxw); margin: 0 auto; display: flex; align-items: center; gap: 3.5rem; }
.hero-text { flex: 1; }
.hero-photo { width: 280px; height: 280px; object-fit: cover; border-radius: 50%; border: 6px solid white; box-shadow: 0 0 0 4px var(--coral), 0 18px 45px rgba(28,34,48,.22); flex-shrink: 0; }
.hero-kicker, .eyebrow { text-transform: uppercase; letter-spacing: .14em; font-size: .72rem; font-weight: 700; color: var(--coral); }
.hero-kicker { display: inline-block; background: var(--coral-soft); padding: .35rem .85rem; border-radius: 99px; margin-bottom: 1.1rem; }
.hero h1 { font-size: clamp(2.6rem, 6vw, 4.2rem); font-weight: 700; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .phd { font-weight: 400; font-style: italic; -webkit-text-fill-color: var(--ink-soft); color: var(--ink-soft); }
.hero-sub { max-width: 680px; font-size: 1.14rem; color: var(--ink-soft); margin-top: 1rem; }
.hero-actions, .section-actions, .contact-links { display: flex; gap: .8rem; flex-wrap: wrap; margin-top: 1.6rem; }

.btn { display: inline-block; padding: .68rem 1.25rem; border-radius: 8px; text-decoration: none; font-weight: 650; font-size: .94rem; transition: transform .15s, box-shadow .15s, background-position .4s; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--grad); background-size: 160% 160%; color: white; box-shadow: 0 6px 16px rgba(240,96,63,.25); }
.btn-primary:hover { background-position: 100% 0; box-shadow: 0 10px 25px rgba(109,90,224,.34); }
.btn-ghost { border: 1.5px solid var(--rule); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--coral); color: var(--coral); }

.section { padding: 4.5rem 1.25rem; }
.section-alt { background: var(--bg-alt); }
.section-inner { max-width: var(--maxw); margin: 0 auto; }
.section h2 { font-size: clamp(1.75rem, 3.5vw, 2.35rem); margin-bottom: 1.45rem; }
.section-num { display: inline-block; font-family: var(--sans); font-size: .88rem; font-weight: 700; color: white; background: var(--accent); vertical-align: middle; margin-right: .7rem; width: 2.1rem; height: 2.1rem; line-height: 2.1rem; text-align: center; border-radius: 8px; box-shadow: 0 4px 10px rgba(14,124,114,.3); }
#research .section-num, #contact .section-num { background: var(--coral); }
#projects .section-num { background: var(--gold); }
#books .section-num { background: var(--violet); }
#media .section-num { background: var(--coral); }
.section-lede { color: var(--ink-soft); margin-top: -.75rem; margin-bottom: 2rem; max-width: 70ch; }
.text-link { font-weight: 650; text-decoration: none; }
.text-link:hover { text-decoration: underline; }

.about-grid { display: grid; grid-template-columns: 1.7fr 1fr; gap: 3rem; align-items: start; }
.about-facts { background: var(--card); border: 1px solid var(--rule); border-radius: 12px; padding: 1.5rem; display: grid; gap: 1.1rem; }
.fact { display: grid; gap: .12rem; font-size: .94rem; }
.fact-label { text-transform: uppercase; letter-spacing: .12em; font-size: .7rem; font-weight: 700; color: var(--accent); }

.pub-list { list-style: none; margin: 0; padding: 0; }
.pub-list li { display: flex; gap: 1.25rem; padding: 1rem 0; border-bottom: 1px solid var(--rule); align-items: baseline; }
.pub-year { font-weight: 700; color: var(--accent); min-width: 3.5rem; font-size: .8rem; text-align: center; background: var(--accent-soft); border-radius: 99px; padding: .2rem 0; align-self: flex-start; margin-top: .15rem; }
.pub-title { font-weight: 650; }
.pub-authors { color: var(--ink-soft); font-size: .92rem; }

.subscribe-card { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; margin-bottom: 2rem; padding: 1.6rem 1.8rem; border-radius: 14px; color: white; background: var(--grad); box-shadow: 0 12px 30px rgba(109,90,224,.25); }
.subscribe-text { flex: 1; min-width: 250px; }
.subscribe-card h3 { color: white; font-size: 1.35rem; margin-bottom: .3rem; }
.subscribe-card p { color: rgba(255,255,255,.92); margin: 0; font-size: .94rem; }
.subscribe-card .btn-primary { background: white; color: var(--accent); box-shadow: 0 6px 16px rgba(0,0,0,.15); }
.subscribe-cta-wrap { display: flex; flex-direction: column; gap: .45rem; min-width: 250px; }
.subscribe-form { display: flex; gap: .55rem; flex-wrap: wrap; }
.subscribe-form input { flex: 1; min-width: 190px; padding: .68rem .9rem; border-radius: 8px; border: 1px solid var(--rule); font: inherit; }
.subscribe-note { font-size: .78rem !important; color: rgba(255,255,255,.82) !important; }

.repo-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; align-items: stretch; }
.repo-card, .feature-card { background: var(--card); border: 1px solid var(--rule); border-top: 4px solid var(--accent); border-radius: 12px; padding: 1.5rem; color: var(--ink); }
.repo-card { text-decoration: none; display: flex; flex-direction: column; min-width: 0; height: 100%; transition: transform .15s, box-shadow .15s; }
.repo-card:hover { transform: translateY(-3px); box-shadow: 0 10px 26px rgba(31,35,40,.12); }
.repo-card:nth-child(2n) { border-top-color: var(--coral); }
.repo-card:nth-child(3n) { border-top-color: var(--violet); }
.repo-head { display: flex; align-items: center; gap: .75rem; margin-bottom: .5rem; }
.repo-icon { flex-shrink: 0; width: 42px; height: 42px; border-radius: 11px; display: inline-flex; align-items: center; justify-content: center; color: var(--accent); background: var(--accent-soft); }
.repo-icon svg { width: 23px; height: 23px; }
.repo-name { font-family: var(--serif); font-weight: 700; font-size: 1.23rem; color: var(--accent); }
.repo-desc { color: var(--ink-soft); font-size: .94rem; flex: 1; }
.repo-meta { display: flex; gap: 1rem; font-size: .8rem; font-weight: 600; color: var(--ink-soft); margin-top: .9rem; flex-wrap: wrap; }
.project-tag { align-self: flex-start; margin: .05rem 0 .8rem; padding: .25rem .65rem; border-radius: 999px; background: var(--coral-soft); color: #a33722; font-size: .68rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.repo-card-game { position: relative; overflow: hidden; border-color: transparent; border-top-color: transparent !important; background: linear-gradient(145deg, #0e7c72 0%, #6d5ae0 55%, #f0603f 115%); box-shadow: 0 12px 28px rgba(83,63,184,.24); }
.repo-card-game::after { content: ""; position: absolute; width: 150px; height: 150px; right: -65px; bottom: -80px; border-radius: 50%; background: rgba(255,255,255,.12); pointer-events: none; }
.repo-card-game:hover { box-shadow: 0 18px 36px rgba(83,63,184,.34); }
.repo-card-game .repo-name, .repo-card-game .repo-desc, .repo-card-game .repo-meta { color: #fff; }
.repo-card-game .repo-icon { color: #fff; background: rgba(255,255,255,.18); }
.repo-card-game .project-tag { color: #fff; background: rgba(255,255,255,.18); border: 1px solid rgba(255,255,255,.32); }

.repo-loading, .repo-error { color: var(--ink-soft); font-style: italic; }

.tracker-card { margin-top: 2rem; padding: 1.6rem; border-radius: 16px; background: var(--card); border: 1px solid var(--rule); display: grid; grid-template-columns: minmax(260px,.85fr) minmax(0,1.5fr); gap: 1.5rem; align-items: center; }
.tracker-copy h3 { font-size: 1.55rem; }

.data-card { margin: 0; padding: .8rem; border-radius: 12px; background: var(--bg-alt); border: 1px solid var(--rule); }


.data-card figcaption { color: var(--ink-soft); font-size: .78rem; margin-top: .45rem; }

.section-heading-row { display: flex; justify-content: space-between; gap: 1rem; align-items: flex-start; }
.carousel-controls { display: flex; gap: .55rem; }
.carousel-btn { width: 42px; height: 42px; border: 1px solid var(--rule); border-radius: 50%; background: var(--card); color: var(--ink); font-size: 1.2rem; cursor: pointer; }
.carousel-btn:hover { border-color: var(--violet); color: var(--violet); }
.book-carousel { display: grid; grid-auto-flow: column; grid-auto-columns: calc((100% - 3rem) / 3); gap: 1.5rem; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: thin; padding: .2rem .15rem 1rem; }
.book-card { scroll-snap-align: start; background: var(--card); border: 1px solid var(--rule); border-top: 4px solid var(--violet); border-radius: 12px; padding: 1.3rem; display: flex; flex-direction: column; min-height: 270px; transition: transform .15s, box-shadow .15s; }
.book-card:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(28,34,48,.1); }
.book-featured { border-top-color: var(--coral); }
.book-card h3 { font-size: 1.08rem; }
.book-lang { text-transform: uppercase; letter-spacing: .1em; font-size: .68rem; font-weight: 700; color: var(--ink-soft); margin-bottom: .45rem; }
.book-card .text-link { margin-top: auto; }

.feature-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.25rem; }
.feature-grid-three { grid-template-columns: repeat(3,1fr); }
.feature-card:nth-child(2) { border-top-color: var(--coral); }
.feature-card:nth-child(3) { border-top-color: var(--violet); }
.feature-card h3 { font-size: 1.3rem; }
.feature-card p:last-child { margin-bottom: 0; }

.section-contact { text-align: center; padding-bottom: 5.5rem; }
.contact-lede { color: var(--ink-soft); }
.contact-links { justify-content: center; }
.site-footer { border-top: 1px solid var(--rule); padding: 1.5rem 1.25rem; text-align: center; font-size: .83rem; color: var(--ink-soft); }
.site-footer p { margin: 0; }

@media (max-width: 980px) {
  .nav-toggle { display: block; }
  .nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; background: var(--bg); border-bottom: 1px solid var(--rule); padding: .5rem 1.25rem 1rem; box-shadow: 0 14px 24px rgba(28,34,48,.08); }
  .nav-links.open { display: flex; }
  .nav-links a { display: block; padding: .62rem 0; font-size: 1rem; }
  .nav-links a.nav-cv { border: 0; padding: .62rem 0; }
  .about-grid, .tracker-card { grid-template-columns: 1fr; }
  .repo-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-grid-three { grid-template-columns: 1fr 1fr; }
  .book-carousel { grid-auto-columns: calc((100% - 1.5rem) / 2); }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .hero { padding: 4rem 1.1rem 3.5rem; }
  .hero-inner { flex-direction: column-reverse; align-items: flex-start; gap: 2rem; }
  .hero-photo { width: 165px; height: 165px; }
  .hero-sub { font-size: 1.04rem; }
  .section { padding: 3.6rem 1.1rem; }
  .about-grid, .repo-grid, .feature-grid, .feature-grid-three { grid-template-columns: 1fr; }
  .pub-list li { flex-direction: column; gap: .25rem; }
  .book-carousel { grid-auto-columns: 84%; gap: 1rem; }
  .section-heading-row { align-items: center; }
  .tracker-card { padding: 1.25rem; }
  
  .hero-actions .btn, .section-actions .btn { text-align: center; }
}

@media (max-width: 430px) {
  .hero-actions, .section-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn, .section-actions .btn { width: 100%; }
  .subscribe-card { padding: 1.35rem; }
  .subscribe-form { flex-direction: column; }
  .subscribe-form input, .subscribe-form .btn { width: 100%; }
  .book-carousel { grid-auto-columns: 91%; }
  .carousel-controls { display: none; }
  .contact-links { flex-direction: column; align-items: stretch; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}

/* ===== Walmart static chart ===== */
.tracker-result {
  display: inline-flex;
  flex-direction: column;
  gap: .1rem;
  margin: .35rem 0 1.15rem;
  padding: .9rem 1.05rem;
  border-radius: 12px;
  background: var(--coral-soft);
  border: 1px solid rgba(240,96,63,.22);
}
.tracker-result-label {
  color: #9b3d2b;
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.tracker-result strong {
  color: var(--coral);
  font-family: var(--serif);
  font-size: clamp(1.85rem, 4vw, 2.55rem);
  line-height: 1.05;
}
.tracker-result-detail {
  color: var(--ink-soft);
  font-size: .82rem;
  font-weight: 600;
}
.tracker-static-chart {
  overflow: hidden;
  background: #fff;
}
.tracker-static-chart img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 9px;
}
.tracker-static-chart figcaption {
  padding: .35rem .1rem 0;
}

@media (max-width: 720px) {
  .tracker-result { width: 100%; }
  .tracker-static-chart { padding: .55rem; }
}

/* ===== Walmart live Google Sheets data ===== */
.tracker-result span,
.tracker-result strong {
  display: block;
}

.tracker-sync-status {
  display: inline-flex;
  align-items: center;
  gap: .42rem;
  margin: -.55rem 0 1rem;
  color: var(--ink-soft);
  font-size: .76rem;
  font-weight: 650;
}

.tracker-sync-status::before {
  content: "";
  width: .52rem;
  height: .52rem;
  flex: 0 0 auto;
  border-radius: 50%;
  background: #a7a198;
}

.tracker-sync-status.is-live::before {
  background: #159a7d;
  box-shadow: 0 0 0 4px rgba(21,154,125,.12);
}

.tracker-chart-svg {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 9px;
}

@media (max-width: 720px) {
  .tracker-result strong {
    font-size: 2rem;
  }

  .tracker-sync-status {
    margin-top: -.45rem;
  }
}

/* ===== New-book launch banner ===== */
.book-banner-bar { background: var(--grad); background-size: 160% 160%; border-bottom: 1px solid rgba(0,0,0,.08); }
.book-banner { display: flex; align-items: center; gap: .9rem; flex-wrap: wrap; max-width: var(--maxw); margin: 0 auto; padding: .55rem 1.25rem; color: #fff; text-decoration: none; font-size: .95rem; }
.book-banner-flag { flex-shrink: 0; text-transform: uppercase; letter-spacing: .1em; font-size: .66rem; font-weight: 700; background: rgba(255,255,255,.22); padding: .28rem .7rem; border-radius: 99px; }
.book-banner-text { display: flex; align-items: baseline; gap: .6rem; flex-wrap: wrap; flex: 1; }
.book-banner-text strong { font-family: var(--serif); font-size: 1.02rem; font-weight: 700; }
.book-banner-sub { color: rgba(255,255,255,.9); font-size: .9rem; font-style: italic; }
.book-banner-cta { flex-shrink: 0; font-weight: 700; }
.book-banner:hover .book-banner-cta { text-decoration: underline; }

/* ===== Featured book (launch) ===== */
.book-hero { display: grid; grid-template-columns: 190px 1fr; gap: 2rem; align-items: start; background: var(--card); border: 1px solid var(--rule); border-top: 4px solid var(--coral); border-radius: 16px; padding: 2rem; margin: 1.5rem 0 2rem; box-shadow: 0 14px 34px rgba(28,34,48,.08); }
.book-hero-cover { position: relative; border-radius: 10px; overflow: hidden; aspect-ratio: 2 / 3; background: var(--grad); display: flex; align-items: center; justify-content: center; box-shadow: 0 10px 26px rgba(28,34,48,.22); }
.book-hero-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.cover-fallback { display: none; color: #fff; font-family: var(--serif); text-align: center; font-size: 1.05rem; line-height: 1.4; padding: 1rem; }
.book-hero-cover.cover-missing .cover-fallback { display: block; }
.book-hero-flag { display: inline-block; text-transform: uppercase; letter-spacing: .1em; font-size: .72rem; font-weight: 700; color: var(--coral); background: var(--coral-soft); padding: .3rem .8rem; border-radius: 99px; margin-bottom: .8rem; }
.book-hero-title { font-size: 1.7rem; margin-bottom: .15rem; }
.book-hero-sub { font-family: var(--serif); font-style: italic; font-size: 1.15rem; color: var(--ink-soft); margin-bottom: .5rem; }
.book-hero-meta { text-transform: uppercase; letter-spacing: .12em; font-size: .72rem; font-weight: 600; color: var(--ink-soft); margin-bottom: 1rem; }
.book-hero-desc { margin-bottom: 1.2rem; }
.book-hero-quote { margin: 0 0 1.3rem; padding: .5rem 0 .5rem 1.1rem; border-left: 3px solid var(--coral); font-style: italic; }
.book-hero-quote cite { display: block; margin-top: .4rem; font-style: normal; font-size: .85rem; color: var(--ink-soft); }
.book-hero-actions { display: flex; gap: .8rem; flex-wrap: wrap; }

/* ===== Clickable publication titles ===== */
a.pub-title { color: var(--ink); text-decoration: none; background-image: linear-gradient(var(--accent), var(--accent)); background-size: 0% 1.5px; background-position: 0 100%; background-repeat: no-repeat; transition: background-size .2s, color .2s; }
a.pub-title:hover, a.pub-title:focus-visible { color: var(--accent); background-size: 100% 1.5px; }

@media (max-width: 620px) {
  .book-banner-cta { display: none; }
  .book-hero { grid-template-columns: 1fr; }
  .book-hero-cover { max-width: 180px; margin: 0 auto; }
}