/* diegoaranasegura.com — single stylesheet */

:root {
  color-scheme: light dark;
  --bg: #fcfcfa;
  --fg: #1c1c1c;
  --muted: #5f5f5f;
  --rule: #d9d9d4;
  --link: #1d4f91;
  --link-hover: #0f3466;
  --accent-bg: #f1f1ec;
  --serif: Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131313;
    --fg: #e4e4e0;
    --muted: #a0a09a;
    --rule: #333330;
    --link: #8ab4f8;
    --link-hover: #b3cdfa;
    --accent-bg: #1e1e1c;
  }
}

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

html { font-size: 106.25%; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--serif);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a { color: var(--link); text-decoration: underline; text-underline-offset: 0.15em; text-decoration-thickness: 1px; }
a:hover { color: var(--link-hover); }
a:focus-visible { outline: 2px solid var(--link); outline-offset: 2px; }

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

.wrap { width: 100%; max-width: 44rem; margin: 0 auto; padding: 0 1rem; }

/* Header / nav */
.site-header { border-bottom: 1px solid var(--rule); font-family: var(--sans); }
.site-header .wrap {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between;
  gap: 0.5rem 1.5rem; padding-top: 1.1rem; padding-bottom: 1.1rem;
}
.site-title { font-weight: 600; font-size: 1.1rem; color: var(--fg); text-decoration: none; letter-spacing: 0.01em; }
.site-title:hover { color: var(--link); }
.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.25rem 1.1rem; }
.site-nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; }
.site-nav a:hover { color: var(--link); }
.site-nav a[aria-current="page"] { color: var(--fg); font-weight: 600; }

/* Narrow screens: the menu collapses behind a toggle (nav.js sets .js) */
.nav-toggle { display: none; }
@media (max-width: 40rem) {
  .js .site-header .wrap { align-items: center; }
  .js .nav-toggle {
    display: inline-flex; align-items: center; gap: 0.45em; cursor: pointer;
    font: inherit; font-size: 0.95rem; color: var(--muted); background: none;
    border: 1px solid var(--rule); border-radius: 6px; padding: 0.3em 0.75em;
  }
  .js .nav-toggle:hover, .js .nav-toggle[aria-expanded="true"] { color: var(--fg); border-color: var(--muted); }
  .js .nav-toggle:focus-visible { outline: 2px solid var(--link); outline-offset: 2px; }
  .js .site-nav { display: none; flex-basis: 100%; }
  .js .nav-toggle[aria-expanded="true"] + .site-nav { display: block; }
  .js .site-nav ul { flex-direction: column; gap: 0; }
  .js .site-nav a { display: block; padding: 0.55rem 0; border-top: 1px solid var(--rule); }
}

/* Main */
main { flex: 1; }
main .wrap { padding-top: 2rem; padding-bottom: 3rem; }

h1, h2, h3 { font-family: var(--sans); line-height: 1.25; margin: 0 0 0.6em; }
h1 { font-size: 1.7rem; font-weight: 700; }
h2 { font-size: 1.25rem; font-weight: 700; margin-top: 2.2rem; padding-bottom: 0.3em; border-bottom: 1px solid var(--rule); }
h2:first-child { margin-top: 0; }
h3 { font-size: 1.05rem; font-weight: 600; margin-top: 1.6rem; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

/* Home */
.about { display: grid; grid-template-columns: 1fr; gap: 1.5rem 2.5rem; align-items: start; }
.about .portrait { width: 12rem; border-radius: 6px; margin: 0 auto; }
@media (min-width: 40rem) {
  .about { grid-template-columns: minmax(0, 1fr) 13rem; }
  .about .portrait { width: 100%; margin: 0.3rem 0 0; }
}

/* Research entries */
.entry { margin-bottom: 1.4rem; }
.entry h3 { margin-bottom: 0.15em; }
.entry .venue { color: var(--muted); font-size: 0.95rem; margin-bottom: 0.4em; }
.entry details { margin: 0.2rem 0 0.5rem; }
.entry summary { cursor: pointer; font-family: var(--sans); font-size: 0.9rem; color: var(--muted); }
.entry summary:hover { color: var(--link); }
.entry details p { margin-top: 0.5em; }
.entry .links { font-family: var(--sans); font-size: 0.9rem; display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0; }
.entry .links a {
  text-decoration: none; padding: 0.15em 0.7em; border: 1px solid var(--rule); border-radius: 999px; background: var(--accent-bg);
}
.entry .links a:hover { border-color: var(--link); }

/* Buttons and embeds */
.button {
  display: inline-block; font-family: var(--sans); font-size: 0.95rem; font-weight: 600; text-decoration: none;
  padding: 0.5em 1.1em; border: 1px solid var(--link); border-radius: 6px; color: var(--link);
}
.button:hover { background: var(--link); color: var(--bg); }
.pdf-embed { width: 100%; height: 80vh; min-height: 30rem; border: 1px solid var(--rule); border-radius: 6px; margin-top: 1.5rem; }
@media (max-width: 40rem) { .pdf-embed { display: none; } }

/* Contact */
.contact-list { list-style: none; padding: 0; margin: 0 0 1.5rem; }
.contact-list li { margin-bottom: 0.5em; }
.contact-list .label { font-family: var(--sans); font-size: 0.85rem; color: var(--muted); display: block; }

/* Footer */
.site-footer { border-top: 1px solid var(--rule); font-family: var(--sans); font-size: 0.9rem; color: var(--muted); }
.site-footer .wrap { padding-top: 1.2rem; padding-bottom: 1.5rem; display: flex; flex-wrap: wrap; gap: 0.3rem 0.6rem; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--link); }

.muted { color: var(--muted); }