/* ============================================================
   Personal academic page — shared stylesheet
   Palette, type and layout tokens live at the top so the whole
   site can be restyled by editing this one block.
   ============================================================ */

:root {
  /* Colour */
  --color-paper: #f7f5f0;      /* page background, warm paper white */
  --color-ink: #1b2a4a;        /* headings, nav, primary accent (deep ink-blue) */
  --color-ink-hover: #142038;  /* darker ink for hover states */
  --color-text: #2b2b28;       /* body copy, warm near-black */
  --color-muted: #6b675e;      /* secondary text */
  --color-gold: #a6803d;       /* accent rule/role colour, muted brass */
  --color-line: #dad5c8;       /* hairline borders */

  /* Type */
  --font-serif: "Newsreader", Georgia, "Times New Roman", serif;
  --font-sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  /* Layout */
  --content-width: 760px;
  --page-pad: 32px;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

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

/* -------------------- Navigation -------------------- */

.site-header {
  border-bottom: 1px solid var(--color-line);
}

.nav {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 22px var(--page-pad);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
}

.nav-name {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-ink);
  text-decoration: none;
  letter-spacing: 0.01em;
}

.home-icon {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-muted);
  font-size: 0.95rem;
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--color-ink);
}

.nav-links a[aria-current="page"] {
  color: var(--color-ink);
  border-bottom-color: var(--color-gold);
}

/* -------------------- Page shell -------------------- */

main {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 64px var(--page-pad) 96px;
}

/* -------------------- About page -------------------- */

.about-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 44px;
  align-items: start;
}

.about-photo {
  border: 1px solid var(--color-line);
  aspect-ratio: 5 / 7;
  overflow: hidden;
  background: #eeece5;
}

.about-photo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.photo-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 16px;
  font-size: 0.85rem;
  color: var(--color-muted);
  line-height: 1.4;
}

.about-name {
  font-family: var(--font-serif);
  font-size: 2.1rem;
  font-weight: 600;
  color: var(--color-ink);
  margin: 0 0 6px;
}

.about-role {
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-gold);
  margin: 0 0 22px;
}

.about-bio p {
  margin: 0 0 16px;
  max-width: 62ch;
}

.cv-link {
  display: inline-block;
  margin-top: 8px;
  padding: 10px 22px;
  border: 1px solid var(--color-ink);
  color: var(--color-ink);
  text-decoration: none;
  font-size: 0.95rem;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.cv-link:hover,
.cv-link:focus-visible {
  background: var(--color-ink);
  color: var(--color-paper);
}

@media (max-width: 620px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
  .about-photo {
    width: 180px;
    aspect-ratio: 4 / 5;
  }
}

/* -------------------- Research: coming soon -------------------- */

.coming-soon h1 {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--color-ink);
  margin: 0 0 14px;
}

.coming-soon p {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--color-muted);
  font-size: 1.1rem;
  margin: 0;
}

/* -------------------- Research: dossier list (future) -------------------- */

.research-section {
  margin-top: 48px;
}

.research-section:first-of-type {
  margin-top: 8px;
}

.research-section > h2 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-ink);
  margin: 0 0 4px;
}

.project {
  border-top: 1px solid var(--color-line);
  padding: 20px 0;
}

.project-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 8px;
  color: var(--color-text);
}

.project-links {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 10px;
}

.project-links a {
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--color-line);
}

.project-links a:hover,
.project-links a:focus-visible {
  border-bottom-color: var(--color-ink);
}

.project-links .sep {
  margin: 0 8px;
  color: var(--color-line);
}

.abstract {
  margin-top: 4px;
}

.abstract summary {
  cursor: pointer;
  list-style: none;
  font-size: 0.9rem;
  color: var(--color-gold);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  user-select: none;
}

.abstract summary::-webkit-details-marker {
  display: none;
}

.abstract summary::before {
  content: "▸";
  font-size: 0.75em;
  transition: transform 0.15s ease;
}

.abstract[open] summary::before {
  transform: rotate(90deg);
}

.abstract p {
  margin: 10px 0 0;
  max-width: 68ch;
  color: var(--color-text);
  font-size: 0.96rem;
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}