/* ============================================================
   Ismael Espinoza Jaramillo — personal site
   Light academic theme, plain CSS, no build step.
   Palette follows the thesis figures (navy, crimson accents).
   ============================================================ */

:root {
  --bg:        #ffffff;
  --bg-soft:   #f6f7f9;
  --ink:       #16191f;   /* headings */
  --text:      #2b3038;   /* body */
  --muted:     #5d6573;
  --faint:     #6b7280;
  --line:      #e3e6eb;

  --accent:    #1e4f8a;   /* navy, links */
  --accent-hover: #12325a;
  --accent-soft:  #eef3f9;
  --real:      #9e1b32;   /* crimson, real-robot labels */
  --real-soft: #fbeff1;

  --radius: 10px;
  --wrap: 1040px;
  --measure: 72ch;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; text-underline-offset: 2px; }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

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

h1, h2, h3, h4 { color: var(--ink); line-height: 1.25; margin: 0; }
p { margin: 0 0 12px; }
em { font-style: italic; }
code { font-size: 0.88em; background: var(--bg-soft); padding: 1px 5px; border-radius: 4px; }

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 8px;
  background: var(--ink);
  color: #fff;
  padding: 8px 12px;
  border-radius: 6px;
  z-index: 100;
}
.skip-link:focus { left: 8px; }

/* ---------- Top bar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(160%) blur(8px);
  -webkit-backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.brand { font-weight: 600; color: var(--ink); letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; color: var(--ink); }

.nav { display: flex; align-items: center; gap: 22px; }
.nav a { color: var(--muted); font-size: 0.92rem; font-weight: 500; }
.nav a:hover, .nav a.active { color: var(--ink); text-decoration: none; }
.nav .nav-cv {
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 6px;
  padding: 4px 12px;
}
.nav .nav-cv:hover { background: var(--accent); color: #fff; }

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); transition: transform 0.2s, opacity 0.2s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Intro ---------- */
.intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 420px;
  gap: 40px;
  align-items: start;
  padding-top: 48px;
  padding-bottom: 40px;
}
.intro-head { display: flex; align-items: center; gap: 16px; margin-bottom: 10px; }
.avatar {
  width: 72px;
  height: 72px;
  flex: none;
  object-fit: cover;
  border-radius: 50%;
  border: 1px solid var(--line);
}
.intro h1 {
  font-size: clamp(1.9rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 2px;
}
.role { color: var(--muted); font-size: 1rem; margin: 0; }
.logistics { color: var(--ink); font-size: 0.95rem; font-weight: 500; margin-bottom: 16px; }
.statement {
  font-size: 1.22rem;
  line-height: 1.45;
  color: var(--ink);
  font-weight: 500;
  margin-bottom: 18px;
  max-width: 34em;
}
.intro-text > p { max-width: var(--measure); }
.intro-text strong { color: var(--ink); font-weight: 600; }
a.quiet { color: inherit; border-bottom: 1px solid var(--line); }
a.quiet:hover { color: var(--accent); text-decoration: none; border-color: var(--accent); }

.links {
  list-style: none;
  padding: 0;
  margin: 22px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.links a {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 500;
  transition: border-color 0.15s, background 0.15s;
}
.links a:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); text-decoration: none; }

.proof { list-style: none; padding: 0; margin: 0 0 4px; max-width: var(--measure); }
.proof li {
  position: relative;
  padding: 3px 0 3px 18px;
  font-size: 0.97rem;
}
.proof li::before {
  content: '';
  position: absolute;
  left: 0; top: 0.8em;
  width: 8px; height: 8px;
  border-radius: 2px;
  background: var(--real);
}
.links a.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.links a.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }
.intro-more { color: var(--muted); font-size: 0.93rem; margin: 18px 0 0; }
.intro-clip { margin: 4px 0 0; }

/* ---------- Sections ---------- */
.section { padding-top: 44px; padding-bottom: 44px; border-top: 1px solid var(--line); }
.section-head { margin-bottom: 24px; }
.section-head h2 { font-size: 1.5rem; font-weight: 700; letter-spacing: -0.01em; }
.section-sub { color: var(--muted); margin: 6px 0 0; max-width: var(--measure); }

.subhead {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 28px 0 14px;
}

/* ---------- Tags ---------- */
.tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 1px 8px;
  border-radius: 4px;
  margin-right: 6px;
  vertical-align: 1px;
  white-space: nowrap;
}
.tag-real { color: var(--real); background: var(--real-soft); }
.tag-sim  { color: var(--accent); background: var(--accent-soft); }

/* ---------- Video reel ---------- */
.reel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}
.clip { margin: 0; }
.clip video, .figure video {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #0f1115;
  border-radius: var(--radius);
}
.figure video.native {
  aspect-ratio: auto;
  object-fit: contain;
  background: #fff;
  border: 1px solid var(--line);
}
.clip figcaption { padding-top: 10px; }
.clip-title { display: block; font-weight: 600; color: var(--ink); }
.clip-meta { display: block; color: var(--muted); font-size: 0.88rem; }

/* ---------- News ---------- */
.news { list-style: none; padding: 0; margin: 0; max-width: 880px; }
.news li {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 16px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
}
.news li:last-child { border-bottom: 0; }
.news-date { color: var(--muted); font-size: 0.9rem; font-variant-numeric: tabular-nums; }

/* ---------- Figures ---------- */
.figure { margin: 0; }
.figure img {
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}
.figure img[data-lightbox] { cursor: zoom-in; }
.figure img[data-lightbox]:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.figure figcaption { color: var(--muted); font-size: 0.86rem; margin-top: 8px; line-height: 1.5; }
.figure.wide { margin: 8px 0 36px; }

/* ---------- Research rows ---------- */
.row {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 36px;
  align-items: start;
  padding: 28px 0;
  border-top: 1px solid var(--line);
}
.row.reverse .row-media { order: 2; }
.row-text h3, .block h3 { font-size: 1.25rem; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 10px; }
.kicker {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}
.result {
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 12px;
  color: var(--ink);
}
.more { font-size: 0.9rem; color: var(--muted); }

.block { padding: 28px 0; border-top: 1px solid var(--line); }
.block-lead, .block-text { max-width: var(--measure); }
.figure.wide-media { margin: 14px 0 20px; }

.pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  margin: 18px 0 22px;
}
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 28px;
  align-items: start;
}

/* ---------- Results tables ---------- */
.table-wrap { overflow-x: auto; margin: 6px 0 10px; }
.results {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  font-variant-numeric: tabular-nums;
}
.results caption {
  text-align: left;
  font-weight: 600;
  color: var(--ink);
  padding-bottom: 8px;
}
.results th, .results td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  white-space: nowrap;
}
.results thead th {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  border-bottom: 1px solid #cfd4db;
}
.results tbody th { font-weight: 500; color: var(--ink); }
.results .num { text-align: right; }
.results .pct::before { content: ' · '; }
.results strong { color: var(--real); font-weight: 600; }
.note { color: var(--muted); font-size: 0.88rem; max-width: var(--measure); }

/* ---------- Repositories ---------- */
.repos {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.repo {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s;
}
.repo:hover { border-color: #c5ccd6; }
.repo h3 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; }
.repo p { font-size: 0.93rem; }
.repo-result { color: var(--ink); }
.repo-tags { margin: auto 0 0; padding-top: 4px; color: var(--faint); font-size: 0.82rem; }

/* ---------- Publications ---------- */
.pubs { display: flex; flex-direction: column; }
.pub {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 22px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.pub:first-child { padding-top: 4px; }
.pub-thumb {
  width: 200px;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
}
.pub-body p { margin: 0 0 4px; }
.pub-title { font-weight: 600; color: var(--ink); line-height: 1.4; }
.pub-authors { color: var(--text); font-size: 0.93rem; }
.pub-authors b, .biblio b { color: var(--ink); font-weight: 600; }
.pub-venue { color: var(--muted); font-size: 0.93rem; }
.pub-venue b { color: var(--text); font-weight: 600; }
.pub-tldr { color: var(--text); font-size: 0.93rem; margin-top: 6px !important; }
.pub-links { font-size: 0.9rem; margin-top: 6px !important; }
.eq { color: var(--faint); font-size: 0.85rem; }

.biblio { padding-left: 20px; margin: 0; }
.biblio li { margin-bottom: 10px; font-size: 0.93rem; max-width: 92ch; }
.biblio i { color: var(--ink); }

.all-pubs { margin-top: 26px; border-top: 1px solid var(--line); padding-top: 14px; }
.all-pubs summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--accent);
  padding: 6px 0;
  list-style-position: inside;
}
.all-pubs h4 {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 20px 0 10px;
}

/* ---------- Experience ---------- */
.cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 48px;
}
.cols .subhead:first-child { margin-top: 0; }
.timeline { list-style: none; padding: 0; margin: 0; }
.timeline li { padding: 0 0 16px 16px; border-left: 2px solid var(--line); position: relative; }
.timeline li::before {
  content: '';
  position: absolute;
  left: -5px; top: 7px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
}
.timeline p { margin: 0 0 2px; }
.t-when { color: var(--muted); font-size: 0.84rem; font-variant-numeric: tabular-nums; }
.t-what { font-weight: 600; color: var(--ink); }
.t-where { color: var(--muted); font-size: 0.92rem; }
.t-desc { font-size: 0.92rem; margin-top: 4px !important; }

.plain { padding-left: 18px; margin: 0; }
.plain li { margin-bottom: 6px; font-size: 0.93rem; }

.skills { margin: 0; display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 6px 14px; font-size: 0.92rem; }
.skills dt { font-weight: 600; color: var(--ink); }
.skills dd { margin: 0; color: var(--text); }

/* ---------- Contact & footer ---------- */
.contact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 28px;
}
.contact h2 { font-size: 1.25rem; margin-bottom: 6px; }
.contact p { margin: 0; color: var(--muted); max-width: 56ch; }
.contact-mails {
  margin: 0;
  display: grid;
  grid-template-columns: auto auto;
  gap: 8px 14px;
  align-items: baseline;
}
.contact-mails dt {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}
.contact-mails dd { margin: 0; }
.contact-mails a { font-weight: 500; white-space: nowrap; }

.footer { border-top: 1px solid var(--line); margin-top: 24px; }
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 18px;
  padding-bottom: 28px;
  color: var(--faint);
  font-size: 0.86rem;
}
.footer p { margin: 0; }

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(15, 17, 21, 0.86);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  cursor: zoom-out;
}
.lightbox[hidden] { display: none; }
.lightbox img {
  max-width: min(1600px, 100%);
  max-height: 100%;
  background: #fff;
  border-radius: 6px;
}
.lightbox-close {
  position: absolute;
  top: 12px; right: 16px;
  background: none;
  border: 0;
  color: #fff;
  font-size: 2rem;
  line-height: 1;
  cursor: pointer;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .nav-toggle { display: flex; }
  .nav {
    position: absolute;
    top: 56px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 6px 24px 14px;
    display: none;
  }
  .nav.open { display: flex; }
  .nav a { padding: 10px 0; font-size: 1rem; }
  .nav .nav-cv { margin-top: 6px; text-align: center; }

  /* without JavaScript the menu stays visible as a plain list */
  .no-js .nav-toggle { display: none; }
  .no-js .nav { display: flex; position: static; flex-direction: row; flex-wrap: wrap; gap: 4px 16px; padding: 0 0 10px; border: 0; }
  .no-js .topbar-inner { height: auto; flex-wrap: wrap; padding-top: 12px; }
  .no-js .topbar { position: static; }

  .intro { grid-template-columns: minmax(0, 1fr) 340px; gap: 28px; }
  .row, .row.reverse { grid-template-columns: 1fr; gap: 18px; }
  .row.reverse .row-media { order: 0; }
  .split { grid-template-columns: 1fr; }
  .cols { grid-template-columns: 1fr; gap: 8px; }
  .repos { grid-template-columns: 1fr; }

  .results { font-size: 0.84rem; }
  .results th, .results td { padding: 7px 6px; white-space: normal; }
  .results .hide-sm { display: none; }
  .results .pct { display: block; color: var(--muted); }
  .results .pct::before { content: none; }
}

@media (max-width: 760px) {
  .intro { grid-template-columns: 1fr; gap: 20px; padding-top: 28px; }
  .avatar { width: 56px; height: 56px; }
  .reel, .pair { grid-template-columns: 1fr; }
  .pub { grid-template-columns: 1fr; gap: 10px; }
  .pub-thumb { width: 100%; max-width: 420px; }
  .contact { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .wrap { padding-left: 16px; padding-right: 16px; }
  .news li { grid-template-columns: 1fr; gap: 0; }
  .skills { grid-template-columns: 1fr; gap: 0; }
  .skills dd { margin-bottom: 8px; }
  .footer-inner { flex-direction: column; gap: 6px; align-items: flex-start; }
  .contact-mails { grid-template-columns: 1fr; gap: 2px; }
  .contact-mails dd { margin-bottom: 8px; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}