/* ------------------------------------------------------------------
   jean-sebastienfontaine.com
   One stylesheet for the whole site. No frameworks, no dependencies.
   Fonts are served from your own server (see /fonts), so this page
   makes no requests to anyone else.
   ------------------------------------------------------------------ */

/* ---------- fonts ---------- */

/* Source Serif 4 — body text, headings, paper titles. Variable weight. */
@font-face {
  font-family: 'Source Serif 4';
  font-style: normal;
  font-weight: 200 900;
  font-display: swap;
  src: url('fonts/source-serif-4.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6,
                 U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122,
                 U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Source Serif 4';
  font-style: normal;
  font-weight: 200 900;
  font-display: swap;
  src: url('fonts/source-serif-4-ext.woff2') format('woff2');
  unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB,
                 U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Source Serif 4';
  font-style: italic;
  font-weight: 200 900;
  font-display: swap;
  src: url('fonts/source-serif-4-italic.woff2') format('woff2');
}

/* Inter — navigation, labels, citation metadata. */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/inter-400.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6,
                 U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122,
                 U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('fonts/inter-600.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6,
                 U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122,
                 U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Inter'; font-style: normal; font-weight: 400;
  font-display: swap;
  src: url('fonts/inter-ext-400.woff2') format('woff2');
  unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB,
                 U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Inter'; font-style: normal; font-weight: 600;
  font-display: swap;
  src: url('fonts/inter-ext-600.woff2') format('woff2');
  unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB,
                 U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

/* ---------- design tokens ---------- */

:root {
  --ink:       #1e2140;   /* main text                                */
  --ink-soft:  #5f6480;   /* authors, journals, dates                 */
  --ink-faint: #8b90a6;   /* footer                                   */
  --accent:    #2c698d;   /* links — your original blue               */
  --rule:      #e6ebeb;   /* hairlines                                */
  --rule-firm: #cbdcdc;   /* section rules, slightly teal             */
  --page:      #fdfdfc;   /* a hair off pure white, easier on the eye */

  --serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI',
           Roboto, 'Helvetica Neue', Arial, sans-serif;

  --measure: 44rem;
}

/* ---------- base ---------- */

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0 2rem;
  background: var(--page);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.125rem;      /* 18px */
  line-height: 1.72;
  font-feature-settings: 'kern' 1, 'liga' 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.wrap {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 4.5rem 0 5rem;
}

p { margin: 0 0 1.25rem; }
p:last-child { margin-bottom: 0; }

a {
  color: var(--accent);
  text-decoration: none;
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
  transition: color 0.12s ease;
}
a:hover, a:focus-visible { text-decoration: underline; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ---------- masthead ---------- */

header.site { margin-bottom: 3.5rem; }

.site-name {
  margin: 0;
  font-family: var(--serif);
  font-size: 2.1rem;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.015em;
}

.site-role {
  margin: 0.55rem 0 0;
  font-family: var(--sans);
  font-size: 0.94rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--ink-soft);
}

nav.site {
  margin-top: 1.9rem;
  padding-top: 1.15rem;
  border-top: 1px solid var(--rule-firm);
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  font-family: var(--sans);
  font-size: 0.95rem;
}

nav.site a { color: var(--ink-soft); }
nav.site a:hover { color: var(--accent); }
nav.site a[aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- about page ---------- */

.intro {
  display: flex;
  gap: 2.5rem;
  align-items: flex-start;
}

/* The portrait, and the photo hiding behind it.
   A hidden checkbox drives the swap — no JavaScript involved. */

.photo-toggle { display: none; }

.photo-swap {
  flex: 0 0 auto;
  display: block;
  cursor: pointer;
  border-radius: 50%;
}
.photo-swap:focus-within { outline: 2px solid var(--accent); outline-offset: 3px; }

.photo-swap img {
  display: block;
  width: 158px;
  height: 158px;
  border-radius: 50%;
  object-fit: cover;
}

.photo-swap .photo-a { object-position: center center; }
.photo-swap .photo-b { display: none; object-position: 42% 42%; }

.photo-toggle:checked + .photo-swap .photo-a { display: none; }
.photo-toggle:checked + .photo-swap .photo-b { display: block; }

/* Text for screen readers only — visible to assistive software, not on screen */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.intro > div { max-width: 34rem; }

.links {
  margin: 3rem 0 0;
  padding: 1.2rem 0 0;
  border-top: 1px solid var(--rule);
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  font-family: var(--sans);
  font-size: 0.94rem;
}
.links li { margin: 0; }

/* ---------- research / policy pages ---------- */

.lede {
  margin: 0 0 1rem;
  max-width: 36rem;
  color: var(--ink-soft);
  font-size: 1.06rem;
  line-height: 1.65;
}

/* ---------- sections ---------- */

h2.section {
  margin: 4rem 0 0;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--rule-firm);
  font-family: var(--sans);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
h2.section:first-of-type { margin-top: 1rem; }
p.lede + h2.section { margin-top: 2.75rem; }

h3.subhead {
  margin: 2.5rem 0 0;
  font-family: var(--sans);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--ink);
}

ul.papers { margin: 0; padding: 0; list-style: none; }

.paper {
  padding: 1.7rem 0;
  border-bottom: 1px solid var(--rule);
}
.paper:last-child { border-bottom: none; }

.paper .title {
  display: block;
  font-family: var(--serif);
  font-size: 1.135rem;
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: -0.005em;
  text-wrap: pretty;
}

/* A linked title stays a title: it takes the text colour, and only
   reveals itself as a link on hover. Keeps long lists calm. */
.paper .title a {
  color: inherit;
  text-decoration: none;
}
.paper .title a:hover,
.paper .title a:focus-visible {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
}

.paper .meta {
  display: block;
  margin-top: 0.4rem;
  font-family: var(--sans);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--ink-soft);
}

.paper .venue { font-style: italic; }

.paper .status {
  font-style: normal;
  font-weight: 600;
  color: var(--accent);
}

.paper .actions {
  margin-top: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
  font-family: var(--sans);
  font-size: 0.855rem;
  letter-spacing: 0.005em;
}

/* the compact Bank of Canada listing */
.compact .paper .actions { margin-top: 0.3rem; font-size: 0.82rem; }
.compact { margin-top: 0.4rem; }
.compact .paper { padding: 0.85rem 0; border-bottom: none; }
.compact .paper .title { font-size: 1.05rem; font-weight: 500; }
.compact .paper .meta { margin-top: 0.15rem; font-size: 0.875rem; }

/* ---------- contact ---------- */

.portrait-figure {
  margin: 3rem 0 0;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
}
.portrait-figure img {
  display: block;
  width: 100%;
  max-width: 26rem;   /* kept modest — it is a photograph, not a hero image */
  height: auto;
  border-radius: 2px;
}
.portrait-figure figcaption {
  margin-top: 0.7rem;
  font-family: var(--sans);
  font-size: 0.86rem;
  color: var(--ink-soft);
}

.contact p { margin: 0 0 1.1rem; }

/* ---------- footer ---------- */

footer.site {
  margin-top: 5rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: 0.84rem;
  color: var(--ink-faint);
}

/* ------------------------------------------------------------------
   Phones and narrow windows — the part the old site never had.
   ------------------------------------------------------------------ */

@media (max-width: 44rem) {
  body { padding: 0 1.35rem; font-size: 1.0625rem; }
  .wrap { padding: 2.75rem 0 3.5rem; }

  header.site { margin-bottom: 2.5rem; }
  .site-name { font-size: 1.72rem; }
  nav.site { margin-top: 1.5rem; gap: 1.5rem; }

  .intro { flex-direction: column; gap: 1.5rem; }
  .photo-swap img { width: 124px; height: 124px; }

  .links { gap: 1.3rem; }
  h2.section { margin-top: 3rem; }
  .paper { padding: 1.45rem 0; }
  .paper .title { font-size: 1.08rem; }
}

/* Readers who prefer less motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}