/* ==========================================================================
   Robert Fonod, personal site
   Single stylesheet, no dependencies. Light/dark via prefers-color-scheme.
   Palette: cool neutrals with a single deep teal accent; color-coded badges.
   ========================================================================== */

:root {
  --bg: #fafbfb;
  --bg-soft: #f2f4f4;
  --card: #ffffff;
  --text: #1b1f23;
  --text-soft: #4a5258;
  --text-faint: #79838a;
  --line: #e4e8e9;
  --accent: #2f6b4f;
  --accent-soft: #e7f1ea;
  --accent-text: #275a43;
  --gold: #8a6d1f;
  --gold-soft: #faf3dc;
  --red: #a3372c;
  --red-soft: #f9ebe8;
  --green: #2f7031;
  --green-soft: #e8f3e6;
  --amber: #96610f;
  --amber-soft: #faf0dc;
  --blue: #2a5d8f;
  --blue-soft: #e6eef6;
  --shadow: 0 1px 2px rgba(23, 30, 32, 0.04), 0 8px 24px -12px rgba(23, 30, 32, 0.12);
  --shadow-lift: 0 2px 4px rgba(23, 30, 32, 0.05), 0 16px 32px -12px rgba(23, 30, 32, 0.18);
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101516;
    --bg-soft: #171d1e;
    --card: #1a2122;
    --text: #e7ebeb;
    --text-soft: #b0b9ba;
    --text-faint: #7d8889;
    --line: #262f30;
    --accent: #6ec49b;
    --accent-soft: #14301e;
    --accent-text: #8ed3aa;
    --gold: #d9b64a;
    --gold-soft: #2c2610;
    --red: #e59084;
    --red-soft: #381a15;
    --green: #8ecf8a;
    --green-soft: #172d16;
    --amber: #e2b166;
    --amber-soft: #33260e;
    --blue: #8ab6dd;
    --blue-soft: #142838;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px -12px rgba(0, 0, 0, 0.5);
    --shadow-lift: 0 2px 4px rgba(0, 0, 0, 0.35), 0 16px 32px -12px rgba(0, 0, 0, 0.6);
  }
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto,
    "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a {
  color: var(--accent-text);
  text-decoration: none;
}
a:hover { text-decoration: underline; text-underline-offset: 3px; }

::selection { background: var(--accent-soft); }

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

.wrap {
  max-width: 46rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section { padding: 3.5rem 0 0.5rem; }

.section-label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-text);
  margin: 0 0 1.25rem;
}
.section-label::before {
  content: "";
  width: 1.6rem;
  height: 3px;
  border-radius: 2px;
  background: var(--accent);
}

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

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  max-width: 46rem;
  margin: 0 auto;
  padding: 0.8rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-name {
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.nav-name:hover { text-decoration: none; color: var(--accent-text); }

.nav-links {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.7rem;
  font-size: 0.88rem;
  justify-content: flex-end;
  white-space: nowrap;
}
.nav-links a { color: var(--text-soft); }
.nav-links a:hover { color: var(--accent-text); text-decoration: none; }
.nav-links a.active { color: var(--accent-text); font-weight: 600; }

/* ---------- hero ---------- */

.hero {
  position: relative;
  padding: 4.5rem 0 1rem;
}

.hero-grid {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}

.portrait {
  flex: 0 0 auto;
  width: 156px;
  height: 156px;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: var(--shadow-lift);
  border: 3px solid var(--card);
  outline: 1px solid var(--line);
}
.portrait img { width: 100%; height: 100%; object-fit: cover; display: block; }

h1 {
  margin: 0 0 0.4rem;
  font-size: clamp(2.1rem, 6vw, 2.9rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  font-weight: 800;
}

.hero-tagline {
  margin: 0 0 0.7rem;
  font-size: 1.15rem;
  color: var(--text-soft);
  line-height: 1.5;
  max-width: 34em;
}

.hero-meta {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-faint);
}
.hero-meta a { color: inherit; font-weight: 550; }
.hero-meta a:hover { color: var(--accent-text); }

/* profile link pills */
.links-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.6rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  padding: 0.34rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--text-soft);
  font-size: 0.88rem;
  font-weight: 500;
  transition: border-color 0.15s ease, color 0.15s ease, transform 0.15s ease, background 0.15s ease;
}
.pill .ic { width: 1.05em; height: 1.05em; flex: none; }
.pill:hover {
  text-decoration: none;
  color: var(--accent-text);
  border-color: color-mix(in srgb, var(--accent) 55%, transparent);
  background: var(--accent-soft);
  transform: translateY(-1px);
}

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

.highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.45rem;
  margin-top: 1.2rem;
  padding: 0;
  list-style: none;
}
.highlights li {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-text);
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
  border-radius: 999px;
  padding: 0.2rem 0.7rem;
  white-space: nowrap;
}

/* stats band */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.8rem;
  margin-top: 1.7rem;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  padding: 0.95rem 1rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: inherit;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.stat:hover { text-decoration: none; transform: translateY(-2px); box-shadow: var(--shadow-lift); }

.stat-num {
  font-size: 1.55rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--accent-text);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-faint);
  line-height: 1.35;
}

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

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--line);
}

.timeline li {
  position: relative;
  padding: 0 0 1.6rem 1.5rem;
}
.timeline li:last-child { padding-bottom: 0.4rem; }

.timeline li::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 0.5em;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--bg);
}

.t-period {
  font-size: 0.83rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-faint);
  text-transform: uppercase;
}

.t-role { font-weight: 650; }
.t-role a { color: var(--text); }
.t-role a:hover { color: var(--accent-text); }

.t-detail {
  font-size: 0.95rem;
  color: var(--text-soft);
  margin-top: 0.15rem;
}

.edu-list {
  list-style: none;
  margin: 2rem 0 0;
  padding: 1.2rem 1.4rem;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.edu-list li { padding: 0.3rem 0; font-size: 0.97rem; }
.edu-list .t-period { margin-right: 0.6rem; }

/* ---------- cards (research + software) ---------- */

.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 0.5rem;
}

.card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.3rem 1.4rem;
  box-shadow: var(--shadow);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
}

.card-icon {
  width: 2.4rem;
  height: 2.4rem;
  margin-bottom: 0.8rem;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-text);
  background: var(--accent-soft);
}
.card:nth-child(2) .card-icon { color: var(--blue); background: var(--blue-soft); }
.card:nth-child(3) .card-icon { color: var(--green); background: var(--green-soft); }
.card-icon svg { width: 1.35rem; height: 1.35rem; }

.card h3 {
  margin: 0 0 0.45rem;
  font-size: 1.06rem;
  letter-spacing: -0.01em;
}
.card h3 a { color: var(--text); }
.card h3 a:hover { color: var(--accent-text); text-decoration: none; }

.card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-soft);
}

.card .card-links {
  margin-top: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.card-more {
  display: inline-block;
  margin-top: 0.7rem;
  font-size: 0.9rem;
  font-weight: 600;
}

.repo-meta {
  font-size: 0.82rem;
  color: var(--text-faint);
  font-weight: 500;
  margin-left: 0.5rem;
  white-space: nowrap;
}

.more-line { margin-top: 1.4rem; font-size: 0.97rem; }

.funders {
  margin-top: 1.4rem;
  font-size: 0.88rem;
  color: var(--text-faint);
  border-left: 3px solid var(--line);
  padding-left: 0.9rem;
}

/* ---------- badges ---------- */

.badge {
  display: inline-block;
  padding: 0.1rem 0.55rem;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: var(--text-soft);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: filter 0.15s ease, transform 0.15s ease;
}
.badge:hover { text-decoration: none; filter: brightness(0.96); transform: translateY(-1px); }
@media (prefers-color-scheme: dark) {
  .badge:hover { filter: brightness(1.15); }
}

.badge-doi    { color: var(--accent-text); background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 30%, transparent); }
.badge-arxiv  { color: var(--red);   background: var(--red-soft);   border-color: color-mix(in srgb, var(--red) 30%, transparent); }
.badge-code   { color: var(--text);  background: var(--bg-soft);    border-color: color-mix(in srgb, var(--text) 22%, transparent); }
.badge-data   { color: var(--green); background: var(--green-soft); border-color: color-mix(in srgb, var(--green) 30%, transparent); }
.badge-model  { color: var(--amber); background: var(--amber-soft); border-color: color-mix(in srgb, var(--amber) 32%, transparent); }
.badge-demo   { color: var(--accent-text); background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 35%, transparent); }
.badge-video  { color: var(--red);   background: var(--red-soft);   border-color: color-mix(in srgb, var(--red) 25%, transparent); }
.badge-pypi   { color: var(--blue);  background: var(--blue-soft);  border-color: color-mix(in srgb, var(--blue) 30%, transparent); }
.badge-zenodo { color: var(--blue);  background: var(--blue-soft);  border-color: color-mix(in srgb, var(--blue) 30%, transparent); }
.badge-pdf    { color: var(--green); background: var(--green-soft); border-color: color-mix(in srgb, var(--green) 30%, transparent); }

.badge.award {
  color: var(--gold);
  background: var(--gold-soft);
  border-color: color-mix(in srgb, var(--gold) 35%, transparent);
  cursor: default;
}

/* ---------- recognition ---------- */

.award-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.award-list li {
  display: flex;
  gap: 1rem;
  align-items: baseline;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--line);
}
.award-list li:last-child { border-bottom: none; }
.award-list .t-period {
  flex: 0 0 6.2rem;
  color: var(--accent-text);
}

.fellowships {
  margin-top: 1.3rem;
  font-size: 0.9rem;
  color: var(--text-faint);
}

/* ---------- service ---------- */

.service-list { list-style: none; margin: 0; padding: 0; }
.service-list li {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
}
.service-list li:last-child { border-bottom: none; }
.service-list .s-title { font-weight: 650; }
.service-list .s-detail { font-size: 0.95rem; color: var(--text-soft); margin-top: 0.1rem; }

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

.page-head { position: relative; padding: 3.5rem 0 0; }
.page-head h1 { font-size: clamp(1.9rem, 5vw, 2.4rem); }
.page-head p { color: var(--text-soft); max-width: 38em; }

.pub-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: 1.4rem 0 0;
}
.pub-toolbar + .pub-toolbar { margin-top: 0.55rem; }

.toolbar-label {
  font-size: 0.8rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-right: 0.2rem;
  min-width: 3.4rem;
}

.filter-btn {
  font: inherit;
  font-size: 0.88rem;
  font-weight: 550;
  padding: 0.3rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text-soft);
  cursor: pointer;
  transition: all 0.15s ease;
}
.filter-btn:hover { border-color: var(--accent-text); color: var(--accent-text); }
.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
@media (prefers-color-scheme: dark) {
  .filter-btn.active { color: #101516; }
}

.pub-group h2 {
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  margin: 2.6rem 0 0.4rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--line);
}

.pub-count {
  color: var(--text-faint);
  font-weight: 500;
  font-size: 1rem;
}

.pub-list { list-style: none; margin: 0; padding: 0; }

.pub {
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--line);
}
.pub:last-child { border-bottom: none; }

.pub-title { font-weight: 650; letter-spacing: -0.005em; }

.pub-authors {
  font-size: 0.93rem;
  color: var(--text-soft);
  margin-top: 0.12rem;
}
.pub-authors .me { font-weight: 700; color: var(--text); }

.pub-venue {
  font-size: 0.93rem;
  color: var(--text-faint);
  font-style: italic;
  margin-top: 0.05rem;
}

.pub-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.5rem;
}

.pub.hidden { display: none; }

.copyright-note {
  font-size: 0.85rem;
  color: var(--text-faint);
  margin-top: 3rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
}

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

footer {
  margin-top: 4.5rem;
  border-top: 1px solid var(--line);
  padding: 2.2rem 0 3rem;
  font-size: 0.9rem;
  color: var(--text-faint);
}

/* ---------- reveal on scroll ---------- */

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .card, .pill, .stat, .badge { transition: none; }
}

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

@media (max-width: 640px) {
  .hero { padding-top: 3rem; }
  .hero-grid { flex-direction: column; align-items: flex-start; gap: 1.5rem; }
  .portrait { width: 124px; height: 124px; }
  .nav-inner { flex-direction: column; align-items: flex-start; gap: 0.3rem; padding-bottom: 0.6rem; }
  .nav-links { justify-content: flex-start; flex-wrap: wrap; white-space: normal; }
  .highlights li { white-space: normal; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .award-list li { flex-direction: column; gap: 0; }
  .award-list .t-period { flex: none; }
}