/* ============================================================
   Antoine Toisoul — personal site
   ============================================================ */

:root {
  --bg:        #f6ece1;   /* warm cream page ground            */
  --bg-alt:    #f0e2d2;   /* very slightly darker cream        */
  --text:      #2b2b2b;   /* body copy                         */
  --muted:     #6b6257;   /* captions, footer                  */
  --accent:    #4f74ab;   /* blue — links, section headings    */
  --accent-dk: #3c5a88;   /* blue hover                        */
  --hero-text: #ffffff;
  --rule:      #d9c9b6;   /* hairline dividers                 */
  --maxw:      960px;
  --font-body:    "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-display: var(--font-body);   /* headings share the body font */
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.9;
  font-weight: 400;
}

img { max-width: 100%; height: auto; display: block; }

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover { color: var(--accent-dk); text-decoration: underline; }

strong, b { font-weight: 600; }

/* ---------- Header (sticky bar, always visible) ------------ */

.site-header {
  position: fixed;              /* out of flow, so the hero starts at the very top */
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.0rem clamp(1rem, 4vw, 2.5rem);
  background: rgba(246, 236, 225, 0.3);   /* --bg (#f6ece1) at 80% */
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.wordmark {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text);
  white-space: nowrap;
}
.wordmark:hover { color: var(--accent); text-decoration: none; }

.site-nav {
  margin-left: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 1.4rem;
}

.site-nav a {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text);
}
.site-nav a:hover { text-decoration: none; color: var(--accent); }
.site-nav a[aria-current="page"] { color: var(--accent); }

.site-social {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}
.site-header .site-social { margin-left: 2rem; }   /* breathing room between the menu and the icons */
.site-social a { display: inline-flex; color: var(--muted); }
.site-social a:hover { color: var(--accent); }
.site-social svg { width: 20px; height: 20px; fill: currentColor; }

/* ---------- Hero (decorative image band, no text) --------- */

.hero {
  min-height: 500px;
  background-color: #7a8ba0;
  background-position: center 40%;
  background-size: cover;
  background-repeat: no-repeat;
}

/* Left-aligned page heading inside <main>, replaces the old hero title */
.page-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.9rem, 4vw, 2.4rem);
  color: var(--text);
  margin: 0 0 2rem;
}
.page-title--center { text-align: center; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip: rect(0 0 0 0); clip-path: inset(50%);
  overflow: hidden; white-space: nowrap;
}

/* Per-page hero images. */
.hero--home         { background-image: url("img/home/royal_albert_hall.jpg"); }
.hero--news         { background-image: url("img/news/dolphin.jpg"); }
.hero--publications { background-image: url("img/publications/tokyo.jpg"); background-position: center 60%; }
.hero--cv           { background-image: url("img/cv/IMG_5321.jpg"); }

/* ---------- Layout --------------------------------------- */

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 3.5rem clamp(1.1rem, 4vw, 2rem) 1rem;
}

section { margin-bottom: 3.5rem; }

.section-heading {
  text-align: center;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.8rem, 4.5vw, 2.4rem);
  color: var(--accent);
  margin: 0 0 2rem;
}
.section-heading a { color: inherit; text-decoration: none; }
.section-heading a:hover { color: var(--accent-dk); text-decoration: underline; }

h2.plain {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--text);
  margin: 2.4rem 0 0.8rem;
  text-align: center;
}

p { margin: 0 0 1.1rem; }

.center { text-align: center; }
.more-link { display: inline-block; margin-top: 0.5rem; font-family: var(--font-display); }

/* ---------- Intro block (home) --------------------------- */

.intro {
  display: flex;
  align-items: flex-start;
  gap: 1.8rem;
}
.intro img {
  flex: 0 0 340px;
  width: 340px;
  align-self: flex-start;   /* whole photo, natural aspect ratio */
  border-radius: 2px;
}
.intro-text { flex: 1 1 auto; min-width: 0; }
.intro-text > p:first-child { margin-top: 0; }
.contact { color: var(--muted); font-size: 0.98rem; }

/* ---------- News list ------------------------------------ */

.news-year {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  margin: 2rem 0 0.4rem;
  color: var(--text);
  text-align: center;
}
.news-list { margin: 0 0 1rem; padding-left: 1.3rem; }
.news-list li { margin-bottom: 0.7rem; }

/* ---------- Publication rows ---------------------------- */

.pub {
  display: flex;
  gap: 1.6rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--rule);
}
.pub:last-child { border-bottom: 1px solid var(--rule); }

.pub-thumb {
  flex: 0 0 160px;
  width: 160px;
}
.pub-thumb img { border-radius: 2px; background: var(--bg-alt); }

.pub-body { flex: 1 1 auto; min-width: 0; }
.pub-title {
  font-family: var(--font-display);
  font-size: 1.18rem;
  line-height: 1.4;
  margin-bottom: 0.3rem;
}
.pub-authors { margin-bottom: 0.15rem; }
.pub-venue { color: var(--muted); }
.pub-links { margin-top: 0.35rem; font-size: 0.98rem; }
.pub-links a { white-space: nowrap; }
.pub-links .sep { color: var(--rule); margin: 0 0.35rem; }

.pub-list { margin: 0 0 1rem; padding-left: 1.3rem; }
.pub-list li { margin-bottom: 0.7rem; }
.pub-list p { margin: 0; }

/* ---------- CV ------------------------------------------ */

.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 1rem;
  padding: 0.55rem 1.4rem;
  border: 1px solid var(--accent);
  border-radius: 3px;
  color: var(--accent);
  margin-bottom: 1.5rem;
}
.btn:hover { background: var(--accent); color: #fff; text-decoration: none; }

.cv-subtitle {
  font-family: var(--font-display);
  color: var(--muted);
  margin: -0.6rem 0 1.6rem;
}

.cv-entry {
  display: flex;
  gap: 1.75rem;
  margin-bottom: 1.9rem;
}
.cv-entry .when {
  flex: 0 0 9.5rem;
  color: var(--muted);
  font-size: 0.96rem;
  padding-top: 0.15rem;
}
.cv-body { flex: 1 1 auto; min-width: 0; }
.cv-body p { margin: 0 0 0.55rem; }
.cv-body p:last-child { margin-bottom: 0; }
.cv-role { font-weight: 700; }
.cv-entry .news-list { margin-top: 0.5rem; }

/* ---------- Footer ------------------------------------- */

.site-footer {
  border-top: 1px solid var(--rule);
  margin-top: 3rem;
  padding: 2.2rem 1rem 2.6rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.95rem;
}

/* ---------- Mobile ------------------------------------ */

@media (max-width: 640px) {
  .site-header {
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    padding: 0.8rem 1rem;
  }
  .wordmark { font-size: 1rem; letter-spacing: 0.04em; }
  .site-nav { flex-basis: 100%; margin-left: 0; justify-content: flex-start; gap: 1rem; row-gap: 0.3rem; }
  .site-social { position: absolute; right: 1rem; top: 0.8rem; }
  .hero { min-height: 220px; }

  .intro { flex-direction: column; }
  .intro img { flex-basis: auto; width: 220px; max-width: 60%; margin: 0 auto 1.2rem; align-self: center; }

  .pub { flex-direction: column; gap: 0.9rem; }
  .pub-thumb { flex-basis: auto; width: 200px; }

  .cv-entry { flex-direction: column; gap: 0.3rem; }
  .cv-entry .when { padding-top: 0; }
}