/* ============================================================
   Daniel Prelipcean — personal site
   Minimalist academic style: one serif family, white background,
   a single muted ink accent, hairline rules, no motion.
   ============================================================ */

:root {
  --paper: #ffffff;
  --paper-alt: #f7f7f5;
  --ink: #1b1b1a;
  --ink-soft: #55565a;
  --ink-faint: #8b8c8f;
  --line: #dcdcd7;
  --accent: #40506e;   /* single muted slate-ink accent, used sparingly */

  --font: "Source Serif 4", Georgia, "Times New Roman", serif;

  --max: 700px;
  --max-wide: 920px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 18px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 2px;
  transition: text-decoration-color 0.12s ease;
}

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

h1, h2, h3, h4 {
  font-family: var(--font);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 0.5em;
  color: var(--ink);
}

p { margin: 0 0 1.1em; }

em, .italic { font-style: italic; }

.mono { font-style: italic; color: var(--ink-soft); }

:focus-visible {
  outline: 1.5px solid var(--accent);
  outline-offset: 2px;
}

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

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

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

/* ---------- top nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.nav-bar {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 58px;
}

.nav-brand {
  font-family: var(--font);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}

.nav-brand span { color: var(--ink-faint); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 2px;
  width: 36px;
  height: 32px;
  color: var(--ink);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle svg { width: 16px; height: 16px; }

.nav-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-links a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 19px 14px;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
}

.nav-links a:hover {
  color: var(--ink);
}

.nav-links a.active {
  color: var(--ink);
  border-bottom: 2px solid var(--accent);
}

@media (max-width: 760px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute;
    top: 58px;
    left: 0;
    right: 0;
    background: var(--paper);
    flex-direction: column;
    align-items: stretch;
    max-height: 0;
    overflow: hidden;
    border-bottom: 1px solid var(--line);
  }
  .nav-links.open { max-height: 640px; }
  .nav-links a { padding: 13px 24px; border-bottom: 1px solid var(--paper-alt); }
  .nav-links a.active { color: var(--accent); border-bottom: 1px solid var(--paper-alt); }
}

/* ---------- hero (home only) ---------- */

.hero {
  padding: 64px 0 20px;
}

.hero-eyebrow {
  font-size: 0.9rem;
  color: var(--ink-faint);
  font-style: italic;
  margin: 0 0 6px;
}

.hero h1 {
  font-size: clamp(2rem, 4.4vw, 2.6rem);
  margin-bottom: 0.2em;
}

.hero .role {
  font-size: 1.1rem;
  color: var(--ink-soft);
  font-style: italic;
  margin-bottom: 22px;
}

.hero .lede {
  max-width: 66ch;
  font-size: 1.02rem;
}

.hero-links {
  font-size: 0.95rem;
  margin-top: 20px;
}

.hero-links a {
  color: var(--ink);
}

/* ---------- generic page header (non-home pages) ---------- */

.page-head {
  padding: 46px 0 30px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 46px;
}

.page-head .kicker {
  font-size: 0.85rem;
  color: var(--ink-faint);
  font-style: italic;
  margin-bottom: 8px;
}

.page-head h1 {
  font-size: clamp(1.7rem, 3.6vw, 2.15rem);
  margin-bottom: 8px;
}

.page-head p {
  color: var(--ink-soft);
  max-width: 60ch;
  margin-bottom: 0;
}

/* ---------- content sections ---------- */

main { background: var(--paper); }

.section {
  padding: 0 0 50px;
}

.section-head {
  margin-bottom: 24px;
}

.section-head h2 {
  font-size: 1.3rem;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.section-note {
  font-size: 0.85rem;
  color: var(--ink-faint);
  font-style: italic;
}

/* ---------- pillars (home page) ---------- */

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.pillar {
  padding: 0 32px;
  border-left: 1px solid var(--line);
}

.pillar:first-child {
  padding-left: 0;
  border-left: none;
}

.pillar:last-child {
  padding-right: 0;
}

.pillar h3 {
  font-size: 1.02rem;
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.3;
}

.pillar p {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin-bottom: 0;
}

@media (max-width: 800px) {
  .pillars-grid { grid-template-columns: 1fr; }
  .pillar {
    padding: 24px 0;
    border-left: none;
    border-top: 1px solid var(--line);
  }
  .pillar:first-child {
    padding-top: 0;
    border-top: none;
  }
  .pillar:last-child { padding-bottom: 0; }
}

/* ---------- profile / about ---------- */

.about-layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 40px;
  align-items: start;
}

.profile-photo {
  width: 100%;
  border: 1px solid var(--line);
  filter: grayscale(35%);
}

.link-pills {
  margin-top: 16px;
}

.link-pill {
  font-size: 0.86rem;
  color: var(--ink-soft);
  text-decoration: underline;
  text-decoration-color: var(--line);
  display: inline-block;
  margin-right: 14px;
  margin-bottom: 6px;
}

.link-pill:hover { color: var(--accent); text-decoration-color: var(--accent); }

@media (max-width: 700px) {
  .about-layout { grid-template-columns: 1fr; }
  .profile-photo { max-width: 160px; }
}

/* ---------- timeline (education / experience / internships) ---------- */

.timeline {
  border-left: 1px solid var(--line);
  padding-left: 24px;
}

.timeline-item {
  padding-bottom: 30px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 30px;
}

.timeline-item:last-child { padding-bottom: 0; border-bottom: none; margin-bottom: 0; }

.tl-date {
  font-size: 0.86rem;
  font-style: italic;
  color: var(--ink-faint);
  margin-bottom: 4px;
}

.tl-title {
  font-family: var(--font);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.tl-org {
  font-size: 0.95rem;
  color: var(--ink-soft);
  font-style: italic;
  margin-bottom: 10px;
}

.tl-body p { margin-bottom: 8px; font-size: 0.98rem; }

.tl-body ul {
  margin: 0 0 8px;
  padding-left: 20px;
}
.tl-body li { margin-bottom: 4px; font-size: 0.98rem; }

/* ---------- simple lists (supervision, teaching, student rep, press) ---------- */

.entry-list {
  display: flex;
  flex-direction: column;
}

.entry {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
.entry:first-child { padding-top: 0; }
.entry:last-child { border-bottom: none; padding-bottom: 0; }

.entry-top {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  align-items: baseline;
}

.entry-title { font-weight: 600; font-size: 1rem; }
.entry-date { font-size: 0.85rem; font-style: italic; color: var(--ink-faint); white-space: nowrap; }
.entry-meta { font-size: 0.92rem; color: var(--ink-soft); margin-top: 3px; }

/* ---------- skills ---------- */

.skill-groups {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 36px 48px;
}

.skill-group h3 {
  font-size: 1rem;
  font-style: italic;
  font-weight: 400;
  color: var(--ink-soft);
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
}

.skill-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--paper-alt);
}
.skill-row:last-child { border-bottom: none; }

.skill-name { font-size: 0.98rem; }

.skill-level {
  font-size: 0.85rem;
  font-style: italic;
  color: var(--ink-faint);
}

@media (max-width: 700px) {
  .skill-groups { grid-template-columns: 1fr; }
}

/* ---------- pill sub-nav (for long pages like publications) ---------- */

.subnav {
  margin-bottom: 46px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.subnav a {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin-right: 18px;
  display: inline-block;
}

/* ---------- publications ---------- */

.pub-list {
  list-style: decimal;
  margin: 0 0 34px;
  padding-left: 22px;
}

.pub-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--paper-alt);
  font-size: 0.98rem;
}
.pub-item:last-child { border-bottom: none; }

.pub-authors {
  color: var(--ink-soft);
}

.pub-title {
  font-weight: 600;
  color: var(--ink);
  margin-top: 3px;
}

.pub-venue {
  margin-top: 4px;
  color: var(--ink-soft);
  font-style: italic;
  font-size: 0.9rem;
}

.pub-year {
  font-style: normal;
  font-weight: 600;
  color: var(--ink);
}

.pub-doi, .pub-link {
  margin-top: 3px;
  font-size: 0.88rem;
  color: var(--ink-faint);
}

.pub-doi a, .pub-link a {
  color: var(--accent);
}

.pub-sub-h {
  font-size: 0.95rem;
  font-style: italic;
  color: var(--ink-soft);
  margin: 0 0 8px;
}

/* ---------- awards / press cards ---------- */

.card-grid {
  display: flex;
  flex-direction: column;
}

.card {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.card:last-child { border-bottom: none; }
.card h3 { font-size: 1.02rem; margin-bottom: 3px; font-weight: 600; }
.card .card-meta { font-size: 0.88rem; font-style: italic; color: var(--ink-faint); }

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

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.contact-block { margin-bottom: 22px; }
.contact-block h3 {
  font-size: 0.85rem;
  font-style: italic;
  color: var(--ink-faint);
  font-weight: 400;
  margin-bottom: 6px;
}
.contact-block p { margin: 0; font-size: 1.05rem; }

.map-frame {
  width: 100%;
  height: 300px;
  border: 1px solid var(--line);
  filter: grayscale(65%) contrast(1.05);
}

@media (max-width: 800px) {
  .contact-grid { grid-template-columns: 1fr; }
}

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

.site-footer {
  border-top: 1px solid var(--line);
  padding: 26px 0;
  font-size: 0.85rem;
  color: var(--ink-faint);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-inner a { color: var(--ink-soft); }