/* ===================================================================
   Ángel García-Lascurain Fernández — academic site
   Two-column intro (portrait beside bio), blue accent,
   interests/education columns, light & dark modes.
   =================================================================== */

:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-2: #f7f8fa;
  --ink: #2b2b2b;
  --ink-soft: #4d5359;
  --ink-faint: #798088;
  --accent: #2962ff;
  --accent-soft: #e8eeff;
  --rule: #e8eaed;
  --shadow: rgba(0, 0, 0, 0.06);
  --max: 60rem;
  --narrow: 46rem;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

[data-theme="dark"] {
  --bg: #14161a;
  --surface: #1b1e24;
  --surface-2: #202430;
  --ink: #e8eaed;
  --ink-soft: #b4bac2;
  --ink-faint: #848b94;
  --accent: #6b93ff;
  --accent-soft: #202b4a;
  --rule: #2a2e36;
  --shadow: rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  transition: background 200ms, color 200ms;
}

/* ---------- header / nav ---------- */

header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}

.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.01em;
}

nav { display: flex; align-items: center; }

nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  margin-left: 1.5rem;
  transition: color 120ms;
}

nav a:hover { color: var(--accent); }

nav a[aria-current="page"] { color: var(--accent); }

.theme-toggle {
  margin-left: 1.5rem;
  background: none;
  border: 1px solid var(--rule);
  border-radius: 8px;
  width: 2.1rem;
  height: 2.1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--ink-soft);
  font-size: 1rem;
  transition: color 120ms, border-color 120ms;
}

.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- intro (photo beside bio) ---------- */

.intro {
  display: grid;
  grid-template-columns: 18rem 1fr;
  gap: 3.2rem;
  align-items: stretch;
  padding-top: 3.6rem;
}

.intro-card { text-align: center; }

.profile-photo, .profile-monogram {
  width: 100%;
  max-width: 15.5rem;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 10px;
  box-shadow: 0 4px 20px var(--shadow);
  margin-bottom: 1.35rem;
}

.profile-monogram {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 3.4rem;
  font-weight: 600;
  color: var(--accent);
  background: linear-gradient(135deg, var(--accent-soft), var(--surface-2));
  border: 1px solid var(--rule);
}

.intro-card h1 {
  font-size: 1.42rem;
  font-weight: 700;
  line-height: 1.3;
  text-wrap: balance;
  letter-spacing: -0.01em;
  margin-bottom: 0.45rem;
}

.intro-card h1 .nb { white-space: nowrap; }

.intro-card .role {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--ink-soft);
}

.intro-card .org { font-size: 0.95rem; line-height: 1.5; margin-top: 0.1rem; }
.intro-card .org a { color: var(--accent); text-decoration: none; }
.intro-card .org a:hover { text-decoration: underline; }

.intro-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.intro-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ink-soft);
  border: 1px solid var(--rule);
  border-radius: 7px;
  padding: 0.34rem 0.75rem;
  text-decoration: none;
  transition: color 120ms, border-color 120ms;
}

.intro-links a:hover { color: var(--accent); border-color: var(--accent); }

.intro-links svg { width: 0.9rem; height: 0.9rem; fill: currentColor; }

.intro-body {
  color: var(--ink-soft);
  border-left: 1px solid var(--rule);
  padding-left: 3.2rem;
  padding-top: 0.4rem;
}

.intro-body strong { color: var(--ink); }
.intro-body a { color: var(--accent); text-decoration: none; }
.intro-body a:hover { text-decoration: underline; }

/* ---------- layout ---------- */

main { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem 4rem; }

section { padding: 2.6rem 0; border-top: 1px solid var(--rule); }

section:first-of-type { border-top: none; }

h2 {
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 1.3rem;
}

.prose { color: var(--ink-soft); max-width: var(--narrow); }
.prose strong { color: var(--ink); }
p + p { margin-top: 0.9rem; }

a.inline { color: var(--accent); text-decoration: none; }
a.inline:hover { text-decoration: underline; }

/* ---------- interests / education columns ---------- */

#background .two-col { margin-top: 0; }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 2.5rem;
  margin-top: 2rem;
}

.two-col h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
}

.interests { list-style: none; }

.interests li {
  color: var(--ink-soft);
  padding: 0.3rem 0 0.3rem 1.3rem;
  position: relative;
}

.interests li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.95em;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--accent);
}

.edu { list-style: none; }

.edu li {
  display: flex;
  gap: 0.85rem;
  padding: 0.45rem 0;
  align-items: flex-start;
}

.edu svg {
  flex: 0 0 auto;
  width: 1.35rem;
  height: 1.35rem;
  fill: var(--accent);
  margin-top: 0.25rem;
}

.edu strong { display: block; line-height: 1.4; }

.edu span { color: var(--ink-faint); font-size: 0.9rem; }

/* ---------- paper cards ---------- */

.card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 1.5rem 1.7rem;
  margin-bottom: 1.15rem;
  box-shadow: 0 1px 4px var(--shadow);
  transition: box-shadow 140ms, border-color 140ms;
}

.card:hover { box-shadow: 0 4px 14px var(--shadow); }

.card h3 {
  font-size: 1.18rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 0.3rem;
}

.card h3 a { color: var(--ink); text-decoration: none; }
.card h3 a:hover { color: var(--accent); }

.card .meta { font-size: 0.875rem; color: var(--ink-faint); margin-bottom: 0.65rem; }
.card .meta .co { color: var(--accent); }

.card p.abstract { color: var(--ink-soft); font-size: 0.965rem; }

.card .links { margin-top: 0.9rem; display: flex; flex-wrap: wrap; gap: 0.6rem; }

.card .links a, .btn {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 0.28rem 0.8rem;
  text-decoration: none;
  transition: background 120ms, color 120ms;
}

.card .links a:hover, .btn:hover { background: var(--accent); color: #fff; }

.btn-primary {
  font-size: 0.95rem;
  padding: 0.6rem 1.4rem;
  color: #fff;
  background: var(--accent);
  border-radius: 8px;
}

.btn-primary:hover { filter: brightness(1.1); background: var(--accent); }

/* ---------- experience / cv entries ---------- */

.cv-entry {
  display: grid;
  grid-template-columns: 8.5rem 1fr;
  gap: 1.2rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--rule);
  max-width: var(--narrow);
}

.cv-entry:last-child { border-bottom: none; }

.cv-entry .when { color: var(--ink-faint); font-size: 0.875rem; padding-top: 0.2rem; }

.cv-entry .what strong { display: block; }

.cv-entry .what span { color: var(--ink-soft); font-size: 0.95rem; }

/* ---------- contact ---------- */

.contact-list { list-style: none; max-width: var(--narrow); }

.contact-list li {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.4rem 0;
  color: var(--ink-soft);
}

.contact-list svg { width: 1.15rem; height: 1.15rem; fill: var(--accent); flex: 0 0 auto; }

.contact-list a { color: var(--accent); text-decoration: none; }
.contact-list a:hover { text-decoration: underline; }

/* ---------- footer ---------- */

footer { border-top: 1px solid var(--rule); }

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.6rem 1.25rem;
  font-size: 0.85rem;
  color: var(--ink-faint);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.footer-inner a { color: var(--ink-soft); text-decoration: none; }
.footer-inner a:hover { color: var(--accent); }

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .intro { grid-template-columns: 1fr; gap: 2rem; padding-top: 2.6rem; }
  .intro-body { border-left: none; padding-left: 0; }
  .profile-photo, .profile-monogram { max-width: 13rem; }
}

@media (max-width: 680px) {
  .intro-card h1 { font-size: 1.45rem; }
  .two-col { grid-template-columns: 1fr; gap: 1.8rem; }
  .cv-entry { grid-template-columns: 1fr; gap: 0.1rem; }
  nav a { margin-left: 1rem; }
  .theme-toggle { margin-left: 1rem; }
}