/* ==========================================================================
   Juan Felipe Imbet — design system
   Palette and type pairing taken from EDHEC's production theme:
   https://www.edhec.edu/themes/custom/edhec/css/variables.css
   ========================================================================== */

:root {
  --grenat: #5F1937;
  --ink: #0E0E0E;
  --paper: #FFFFFF;
  --grenat-pastel: #ECE4E7;
  --coral: #FF6E6E;        /* decorative fills only — 2.72:1 on white */
  --bleu: #00B9FF;         /* decorative fills only — 2.24:1 on white */
  --coral-ink: #A63446;    /* interactive text/borders — 6.56:1 on white */
  --bleu-ink: #007FB0;     /* focus rings — 4.50:1 on white */
  --border: #DCDCDC;
  --muted: #5A5A5A;

  /* Research-map series. One per agenda slug in build.py's AGENDAS; the
     scatter reads these by name, so a new agenda needs a token here. */
  --plot-social-media: #A63446;          /* 6.56:1 on white */
  --plot-corporate-finance: #5F1937;     /* 12.49:1 on white */
  --plot-asset-pricing: #007FB0;         /* 4.50:1 on white */
  --plot-computational-finance: #6B5300; /* 7.34:1 on white */

  --display: "Montserrat", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --body: "Open Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;

  --step--1: clamp(0.80rem, 0.77rem + 0.15vw, 0.88rem);
  --step-0:  clamp(1.00rem, 0.96rem + 0.20vw, 1.13rem);
  --step-1:  clamp(1.25rem, 1.18rem + 0.35vw, 1.45rem);
  --step-2:  clamp(1.56rem, 1.44rem + 0.60vw, 1.94rem);
  --step-3:  clamp(1.95rem, 1.74rem + 1.05vw, 2.63rem);
  --step-4:  clamp(2.44rem, 2.08rem + 1.80vw, 3.75rem);

  --wrap: 1200px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --rhythm: clamp(3rem, 7vw, 6rem);
}

@media (prefers-color-scheme: dark) {
  :root {
    --grenat: #D4849F;
    --ink: #F2ECEE;
    --paper: #0E0E0E;
    --grenat-pastel: #1B1216;
    --border: #33282C;
    --muted: #A79AA0;
    /* On near-black these pass comfortably, so the bright originals return. */
    --coral-ink: #FF6E6E;
    --bleu-ink: #00B9FF;
    --plot-social-media: #FF8A8A;
    --plot-corporate-finance: #D4849F;
    --plot-asset-pricing: #4FC9FF;
    --plot-computational-finance: #E0B84C;
  }
}

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

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: var(--step-0);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 700;
  line-height: 1.15;
  color: var(--grenat);
  margin: 0 0 0.5em;
  letter-spacing: -0.015em;
}

p { margin: 0 0 1.15em; max-width: 68ch; }

a { color: var(--grenat); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--coral-ink); }

:focus-visible {
  outline: 3px solid var(--bleu-ink);
  outline-offset: 2px;
  border-radius: 2px;
}

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

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }

.skip-link {
  position: absolute; left: -9999px;
  background: var(--grenat); color: #FFFFFF;
  padding: 0.75rem 1.25rem; z-index: 100;
}
.skip-link:focus { left: 1rem; top: 1rem; }

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

.site-nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.site-nav__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 0.75rem 1.5rem; min-height: 4.25rem;
  /* Below ~360px the brand and the four controls no longer fit on one line;
     wrapping keeps the page from scrolling sideways. */
  flex-wrap: wrap;
}
.site-nav__brand {
  font-family: var(--display); font-weight: 700; font-size: var(--step--1);
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--grenat); text-decoration: none; white-space: nowrap;
}
.site-nav__links {
  display: flex; gap: clamp(0.85rem, 3vw, 2.25rem); align-items: center;
  flex-wrap: wrap;
}
.site-nav__links a {
  font-family: var(--display); font-weight: 600; font-size: var(--step--1);
  color: var(--ink); text-decoration: none;
  padding-block: 0.35rem; border-bottom: 2px solid transparent;
}
.site-nav__links a:hover { color: var(--grenat); border-bottom-color: var(--coral-ink); }
.site-nav__links a[aria-current="page"] { color: var(--grenat); border-bottom-color: var(--grenat); }

/* --- Hero ---------------------------------------------------------------- */

.hero { padding-block: clamp(3rem, 8vw, 6rem) clamp(2rem, 5vw, 4rem); }
.hero__grid {
  display: grid; gap: clamp(2rem, 5vw, 4rem);
  grid-template-columns: 1fr;
  align-items: center;
}
@media (min-width: 900px) {
  .hero__grid { grid-template-columns: 1.15fr 0.85fr; }
}
.hero__title {
  font-size: var(--step-4); margin-bottom: 0.35em;
  text-wrap: balance;
}
.hero__role {
  font-family: var(--display); font-weight: 600; font-size: var(--step-1);
  color: var(--ink); margin: 0 0 0.15em;
}
.hero__institution { color: var(--muted); font-size: var(--step-0); margin-bottom: 1.5rem; }

/* EDHEC's mark. Its official grenat is the same #5F1937 the site is built on,
   so it is drawn with the theme tokens and follows light and dark mode. */
.edhec { display: block; width: 8.25rem; height: auto; }
.edhec__ink { fill: var(--grenat); }
.edhec__paper { fill: var(--paper); }
.edhec-link { display: inline-block; text-decoration: none; opacity: 0.85; transition: opacity 0.15s; }
.edhec-link:hover, .edhec-link:focus-visible { opacity: 1; }

.hero__institution .edhec { width: 9.5rem; margin-top: 0.55rem; }

.site-footer__mark { margin-top: -0.35rem; }
.site-footer__mark .edhec { width: 7rem; }

.rule { border: 0; height: 3px; width: 4.5rem; background: var(--coral); margin: 1.75rem 0; }

.hero__portrait {
  /* Native size is 369x560; never upscale it. */
  display: block; width: min(100%, 369px); margin-inline: auto;
  border: 1px solid var(--border);
}

/* --- Research map (scatter of papers in embedding space) ----------------- */

.plot { position: relative; margin: 1.5rem 0 0; }
.plot__canvas {
  display: block; width: 100%; aspect-ratio: 1 / 1;
  background: var(--paper); border: 1px solid var(--border);
  touch-action: manipulation;
}
@media (min-width: 700px) {
  .plot__canvas { aspect-ratio: 16 / 10; }
}
.plot__canvas:focus-visible { outline: 3px solid var(--bleu-ink); outline-offset: 2px; }

.plot__tooltip {
  position: absolute; pointer-events: none; z-index: 2;
  max-width: min(22rem, 70%);
  font-family: var(--body); font-size: var(--step--1); line-height: 1.35;
  background: var(--grenat); color: #FFFFFF;
  padding: 0.4rem 0.6rem; opacity: 0; transition: opacity 120ms;
}
.plot__tooltip[data-visible="true"] { opacity: 1; }

.plot__legend {
  display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem;
  list-style: none; padding: 0; margin: 1rem 0 0;
  font-size: var(--step--1); color: var(--ink);
}
.plot__legend li { display: flex; align-items: center; gap: 0.5rem; }
.plot__swatch {
  /* Shape mirrors the marker drawn on the canvas by assets/js/hero.js. */
  width: 0.75rem; height: 0.75rem;
  background: var(--muted); flex: none;
}
.plot__swatch[data-agenda="social-media"] { border-radius: 50%; }
.plot__swatch[data-agenda="asset-pricing"] {
  clip-path: polygon(50% 0%, 100% 90%, 0% 90%);
}
.plot__swatch[data-agenda="computational-finance"] {
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}
.plot__swatch[data-agenda="social-media"] { background: var(--plot-social-media); }
.plot__swatch[data-agenda="corporate-finance"] { background: var(--plot-corporate-finance); }
.plot__swatch[data-agenda="asset-pricing"] { background: var(--plot-asset-pricing); }
.plot__swatch[data-agenda="computational-finance"] { background: var(--plot-computational-finance); }

.plot__hint { font-size: var(--step--1); color: var(--muted); margin: 0.75rem 0 0; }

/* --- Sections ------------------------------------------------------------ */

.section { padding-block: var(--rhythm); }
.section--tint { background: var(--grenat-pastel); }
.eyebrow {
  font-family: var(--display); font-weight: 700; font-size: var(--step--1);
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 0.75rem;
}
.section__title { font-size: var(--step-3); margin-bottom: 2.5rem; }
.section__more { margin-top: 2.5rem; }

/* --- Numbered entries ---------------------------------------------------- */

.entry {
  display: grid; gap: 0.5rem 2rem;
  grid-template-columns: 1fr;
  padding-block: 2.25rem;
  border-top: 1px solid var(--border);
}
.entry:last-child { border-bottom: 1px solid var(--border); }
@media (min-width: 760px) {
  .entry { grid-template-columns: 4.5rem 1fr; }
}
.entry__num {
  font-family: var(--display); font-weight: 700; font-size: var(--step-1);
  color: var(--grenat); font-variant-numeric: tabular-nums; line-height: 1.2;
}
.entry__title { font-size: var(--step-1); margin-bottom: 0.35rem; }
.entry__title a { text-decoration: none; }
.entry__title a:hover { text-decoration: underline; }
.entry__authors { color: var(--ink); margin-bottom: 0.2rem; }
.entry__authors strong { font-weight: 600; }
.entry__venue {
  font-family: var(--display); font-weight: 600; font-size: var(--step--1);
  color: var(--muted); margin-bottom: 0.9rem;
}
.summary {
  border-left: 3px solid var(--coral);
  padding-left: 1.15rem; margin-block: 1.1rem;
  color: var(--ink);
}
.summary p { margin-bottom: 0; }

.entry details { margin-block: 0.75rem; }
.entry summary {
  cursor: pointer; font-family: var(--display); font-weight: 600;
  font-size: var(--step--1); color: var(--grenat);
  list-style: none; padding-block: 0.35rem;
}
.entry summary::-webkit-details-marker { display: none; }
.entry summary::before { content: "+ "; font-variant-numeric: tabular-nums; }
.entry details[open] summary::before { content: "− "; }

.entry__links { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; margin-top: 0.75rem; }
.entry__links a {
  font-family: var(--display); font-weight: 600; font-size: var(--step--1);
  text-decoration: none; border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
}
.entry__links a:hover { border-bottom-color: var(--coral-ink); }

.chip {
  display: inline-block; font-family: var(--mono); font-size: var(--step--1);
  color: var(--muted); border: 1px solid var(--border);
  padding: 0.1rem 0.5rem; margin-right: 0.35rem;
}

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

.site-footer {
  border-top: 1px solid var(--border);
  padding-block: var(--rhythm) 2.5rem;
  margin-top: var(--rhythm);
}
.profile-links { display: flex; gap: 1.25rem; align-items: center; }
.profile-links a { color: var(--ink); display: inline-flex; }
.profile-links a:hover { color: var(--coral-ink); }
.profile-links svg { width: 22px; height: 22px; fill: currentColor; }

.colophon { color: var(--muted); font-size: var(--step--1); margin-top: 2rem; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.site-nav__search {
  background: none; border: 1px solid var(--border); cursor: pointer;
  color: var(--ink); font-size: var(--step-1); line-height: 1;
  padding: 0.15rem 0.6rem; font-family: var(--body);
}
.site-nav__search:hover { border-color: var(--coral-ink); color: var(--grenat); }

/* --- Search -------------------------------------------------------------- */

.search {
  position: fixed; inset: 0; z-index: 90;
  background: color-mix(in srgb, var(--ink) 55%, transparent);
  display: flex; justify-content: center; padding: 10vh 1rem 1rem;
}
.search[hidden] { display: none; }
.search__panel {
  background: var(--paper); border: 1px solid var(--border);
  width: min(100%, 640px); max-height: 70vh; overflow: auto; padding: 1.25rem;
}
.search__input {
  width: 100%; font-family: var(--body); font-size: var(--step-1);
  padding: 0.65rem 0.5rem; color: var(--ink); background: transparent;
  border: 0; border-bottom: 2px solid var(--bleu-ink);
}
.search__input:focus { outline: none; }
.search__status { color: var(--muted); font-size: var(--step--1); margin: 0.75rem 0 0; }
.search__results { list-style: none; margin: 0.75rem 0 0; padding: 0; }
.search__result a {
  display: block; padding: 0.7rem 0.5rem; text-decoration: none;
  border-bottom: 1px solid var(--border);
}
.search__result[aria-selected="true"] a,
.search__result a:hover { background: var(--grenat-pastel); }
.search__title { display: block; font-family: var(--display); font-weight: 600; color: var(--grenat); }
.search__meta { display: block; font-size: var(--step--1); color: var(--muted); }