/* ============================================================
   Ignacio Aravena — personal site
   Static site for GitHub Pages. Edit content in the .html files.
   Palette: warm paper + ink, single blueprint-blue accent.
   Type: Newsreader (serif) for reading, IBM Plex Mono for labels.
   ============================================================ */

:root {
  --paper:      #fcfbf9;
  --paper-alt:  #f5f2ec;
  --ink:        #1c1b19;
  --muted:      #6d6a63;
  --faint:      #97938b;
  --accent:     #26506e;
  --accent-deep:#1c3d55;
  --rule:       #e6e2da;

  /* tier / accent palette */
  --blue:  #26506e;
  --green: #2c6a56;
  --amber: #a9772e;
  --brick: #9a4a41;

  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --mono:  "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --maxw: 1180px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.62;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  animation: fade-in 0.6s ease both;
}

@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }

/* ---------- layout ---------- */
.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 40px;
  display: grid;
  grid-template-columns: 296px 1fr;
  gap: 68px;
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 84px;
  padding: 56px 0 40px;
}

.content {
  padding: 56px 0 96px;
  max-width: 660px;
}

/* ---------- top navigation bar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(252, 251, 249, 0.9);
  backdrop-filter: saturate(1.2) blur(8px);
  -webkit-backdrop-filter: saturate(1.2) blur(8px);
  border-bottom: 1px solid var(--rule);
}
.topbar-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 13px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.wordmark {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}
.topnav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 4px 20px;
}
.topnav a {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  padding: 3px 0;
  transition: color 0.18s ease;
}
.topnav a:hover { color: var(--ink); }
.topnav a[aria-current="page"] { color: var(--accent-deep); }

/* ---------- sidebar identity ---------- */
.eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 14px;
}

.name {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 2.15rem;
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0 0 6px;
}

.name a { color: var(--ink); text-decoration: none; }

.role {
  font-style: italic;
  color: var(--muted);
  font-size: 1.02rem;
  margin: 0 0 24px;
}

.portrait {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  background: var(--paper-alt);
  border: 1px solid var(--rule);
  margin: 0 0 26px;
  display: block;
}

.affil {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.45;
}
.affil li { margin-bottom: 10px; padding-left: 14px; position: relative; }
.affil li::before {
  content: "";
  position: absolute; left: 0; top: 0.62em;
  width: 6px; height: 1px; background: var(--accent);
}

.rule {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 26px 0;
}

/* ---------- nav ---------- */
.nav { list-style: none; margin: 0; padding: 0; }
.nav li { margin: 0; }
.nav a {
  display: block;
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  padding: 7px 0 7px 15px;
  border-left: 2px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.nav a:hover { color: var(--ink); border-left-color: var(--rule); }
.nav a[aria-current="page"] {
  color: var(--accent-deep);
  border-left-color: var(--accent);
}

/* ---------- content ---------- */
.section-label {
  font-family: var(--mono);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0 0 24px;
  padding-bottom: 13px;
  border-bottom: 1.5px solid var(--rule);
}

.content h1 {
  font-weight: 500;
  font-size: 1.9rem;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 24px;
}

.content p { margin: 0 0 20px; }

.content a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(38, 80, 110, 0.28);
  transition: border-color 0.18s ease, color 0.18s ease;
}
.content a:hover { color: var(--accent-deep); border-bottom-color: var(--accent); }

.lead { font-size: 1.14rem; }

/* ---------- papers ---------- */
.paper { padding: 26px 0; border-top: 1px solid var(--rule); }
.paper:first-of-type { border-top: 0; padding-top: 4px; }

.paper-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
  background: rgba(38, 80, 110, 0.09);
  padding: 3px 9px;
  border-radius: 3px;
  margin-bottom: 12px;
}
.paper-tag.t-green { color: var(--green); background: rgba(44, 106, 86, 0.10); }
.paper-tag.t-amber { color: var(--amber); background: rgba(169, 119, 46, 0.12); }
.paper-tag.t-brick { color: var(--brick); background: rgba(154, 74, 65, 0.10); }
.paper-tag.wip     { color: var(--amber); background: rgba(169, 119, 46, 0.12); }

.paper h3 {
  font-weight: 500;
  font-size: 1.24rem;
  line-height: 1.28;
  margin: 0 0 6px;
}
.paper h3 a { border-bottom-width: 0; }
.paper h3 a:hover { border-bottom-width: 1px; }

.paper .coauthors {
  font-style: italic;
  color: var(--muted);
  font-size: 0.96rem;
  margin: 0 0 12px;
}

.paper .abstract {
  color: #38352f;
  font-size: 0.98rem;
  line-height: 1.58;
  margin: 0;
}

/* ---------- teaching list ---------- */
.course { padding: 24px 0; border-top: 1px solid var(--rule); }
.course:first-of-type { border-top: 0; padding-top: 4px; }
.course .code {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 8px;
}
.course h3 { font-weight: 500; font-size: 1.18rem; margin: 0 0 6px; }
.course .where { color: var(--muted); font-style: italic; font-size: 0.96rem; margin: 0 0 8px; }
.course p { font-size: 0.98rem; color: #38352f; margin: 0; }

/* ---------- contact ---------- */
.links { list-style: none; margin: 0; padding: 0; }
.links li {
  display: flex;
  gap: 18px;
  align-items: baseline;
  padding: 13px 0;
  border-top: 1px solid var(--rule);
}
.links li:first-child { border-top: 0; }
.links .k {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
  min-width: 92px;
}

/* ---------- writing / policy entries ---------- */
.entry { padding: 22px 0; border-top: 1px solid var(--rule); }
.entry:first-of-type { border-top: 0; padding-top: 4px; }
.entry .meta {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}
.entry .meta .date { color: var(--faint); }
.entry h3 {
  font-weight: 500;
  font-size: 1.14rem;
  line-height: 1.3;
  margin: 0 0 6px;
}
.entry h3 a { border-bottom-width: 0; }
.entry h3 a:hover { border-bottom-width: 1px; }
.entry p { font-size: 0.95rem; color: var(--muted); line-height: 1.55; margin: 0; }

/* ---------- colored section labels (per tier) ---------- */
.section-label.t-blue  { color: var(--blue);  border-bottom-color: var(--blue);  border-bottom-width: 2px; }
.section-label.t-green { color: var(--green); border-bottom-color: var(--green); border-bottom-width: 2px; }
.section-label.t-amber { color: var(--amber); border-bottom-color: var(--amber); border-bottom-width: 2px; }
.section-label.t-brick { color: var(--brick); border-bottom-color: var(--brick); border-bottom-width: 2px; }

/* ---------- link chips (PDF / versions / coverage) ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 0; }
.content a.chip {
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  border: 1px solid rgba(38, 80, 110, 0.35);
  border-radius: 3px;
  padding: 3px 9px;
  text-decoration: none;
  transition: background 0.18s ease, border-color 0.18s ease;
}
.content a.chip:hover { background: rgba(38, 80, 110, 0.08); border-color: var(--blue); }
.content a.chip.press {
  color: var(--brick);
  border-color: rgba(154, 74, 65, 0.4);
}
.content a.chip.press:hover { background: rgba(154, 74, 65, 0.08); border-color: var(--brick); }

/* ---------- media coverage row ---------- */
.coverage { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 12px; }
.coverage .clabel {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
}

/* ---------- op-eds page: press theme ---------- */
.media .section-label {
  color: var(--brick);
  border-bottom-color: var(--brick);
  border-bottom-width: 2px;
}
.media .entry .meta { color: var(--brick); }

/* ---------- responsive ---------- */
@media (max-width: 820px) {
  .topbar { display: none; }
  .wrap {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 0 28px;
  }
  .sidebar {
    position: static;
    padding: 48px 0 8px;
    max-width: 560px;
    margin: 0 auto;
    text-align: center;
  }
  .portrait { max-width: 220px; margin-left: auto; margin-right: auto; }
  .name { font-size: 2rem; }
  /* affiliations read cleaner centered without the hanging dash */
  .affil { display: inline-block; text-align: left; }
  .content { padding: 40px 0 72px; max-width: 640px; }
  .nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px 6px; margin-top: 8px; }
  .nav a { border-left: 0; padding: 6px 12px; border: 1px solid var(--rule); }
  .nav a:hover { border-color: var(--faint); }
  .nav a[aria-current="page"] { border-color: var(--accent); color: var(--accent-deep); }
}

/* ---------- a11y ---------- */
a:focus-visible, .nav a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 1px;
}

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