/* ============================================================
   dangillphysics.com  ·  v2 "quad pad"
   Off-white engineering-paper base with a faint drafting grid.
   Green = action and markers. Blue = links and data.
   Type: Schibsted Grotesk (display) / Albert Sans (body)
   ============================================================ */

:root {
  --paper: #f7f8f3;
  --card: #ffffff;
  --ink: #1c2b33;
  --muted: #5c6e76;
  --green: #1e7a52;
  --green-deep: #145a3c;
  --blue: #2456a6;
  --line: #e2e6db;
  --grid: rgba(36, 86, 166, 0.05);
  --maxw: 1100px;
  --radius: 10px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  font-family: "Albert Sans", "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 32px 32px;
}

::selection { background: rgba(30, 122, 82, 0.18); }

h1, h2, h3 {
  font-family: "Schibsted Grotesk", "Segoe UI", sans-serif;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0 0 0.5em;
  color: var(--ink);
}

h1 { font-size: clamp(2.3rem, 5.2vw, 3.5rem); }
h2 { font-size: clamp(1.55rem, 3vw, 2rem); }
h3 { font-size: 1.22rem; }

p { margin: 0 0 1em; }

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

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
  border-radius: 3px;
}

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

.mono {
  font-weight: 600;
  font-size: 0.88rem;
  letter-spacing: 0.01em;
}

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

/* ---------- eyebrow labels ---------- */
.eyebrow {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.17em;
  text-transform: uppercase;
  color: var(--green);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 9px;
  height: 9px;
  background: var(--green);
  flex-shrink: 0;
}
.eyebrow.warm { color: var(--blue); }
.eyebrow.warm::before { background: var(--blue); }

/* ---------- nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 248, 243, 0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 62px;
  flex-wrap: wrap;
  padding-block: 8px;
}
.brand {
  font-family: "Schibsted Grotesk", sans-serif;
  font-weight: 700;
  font-size: 1.08rem;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand:hover { text-decoration: none; }
.brand .dot {
  width: 10px;
  height: 10px;
  background: var(--green);
}
.nav-links { display: flex; gap: 26px; flex-wrap: wrap; }
.nav-links a { color: var(--muted); font-size: 0.95rem; font-weight: 600; }
.nav-links a:hover { color: var(--ink); text-decoration: none; }
.nav-links a.active { color: var(--green); }

/* ---------- buttons ---------- */
.btn {
  display: inline-block;
  font-family: "Schibsted Grotesk", sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 11px 22px;
  border-radius: 8px;
  border: 1px solid var(--green);
  background: var(--green);
  color: #ffffff;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.btn:hover {
  text-decoration: none;
  background: var(--green-deep);
  border-color: var(--green-deep);
}
.btn.ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}
.btn.ghost:hover { border-color: var(--green); color: var(--green); }
.btn-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 26px; }

/* ---------- hero ---------- */
.hero {
  padding: 80px 0 60px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.55), rgba(255, 255, 255, 0));
}
.hero .wrap {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}
.hero p.lede {
  font-size: 1.12rem;
  color: var(--muted);
  max-width: 54ch;
}
.hero p.lede strong { color: var(--ink); font-weight: 600; }

.portrait-frame {
  position: relative;
  width: min(320px, 76vw);
  margin-inline: auto;
}
.portrait {
  border-radius: 16px;
  border: 1px solid var(--line);
  box-shadow: 0 14px 34px rgba(28, 43, 51, 0.12);
  background: var(--card);
}
/* pinned-photo corner mark */
.portrait-frame::after {
  content: "";
  position: absolute;
  top: -9px;
  right: -9px;
  width: 22px;
  height: 22px;
  border-top: 3px solid var(--green);
  border-right: 3px solid var(--green);
}

.toolline {
  margin-top: 32px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.toolline span { color: var(--green); padding-inline: 8px; }

/* page-load stagger */
.rise { animation: rise 0.6s ease both; }
.rise.d1 { animation-delay: 0.07s; }
.rise.d2 { animation-delay: 0.14s; }
.rise.d3 { animation-delay: 0.21s; }
@keyframes rise {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- sections ---------- */
section { padding: 68px 0; }
section + section { border-top: 1px solid var(--line); }

/* ---------- about ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 56px;
  align-items: start;
}
.facts { margin: 0; }
.facts div { padding: 13px 0; border-bottom: 1px solid var(--line); }
.facts div:first-child { border-top: 1px solid var(--line); }
.facts dt {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 2px;
}
.facts dd { margin: 0; }
.chip-logo { margin-top: 26px; display: inline-block; }
.chip-logo img { height: 44px; width: auto; }

/* ---------- research features ---------- */
.feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 52px;
  align-items: center;
  padding: 44px 0;
}
.feature + .feature { border-top: 1px dashed var(--line); }
.feature .media {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}
.feature .media.plain { background: var(--card); }
.feature .media img { border-radius: 5px; }
.feature.rev .media { order: 2; }
.feature .links { display: flex; gap: 22px; flex-wrap: wrap; margin-top: 8px; }

/* ---------- project cards ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 12px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 26px 22px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease;
}
.card:hover { border-color: var(--green); }
.card h3 { margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 0.97rem; flex: 1; }
.card .tags {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green);
  margin: 14px 0 10px;
}
.card a.more { font-size: 0.92rem; font-weight: 600; }

/* ---------- gallery ---------- */
.gallery {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 18px;
}
.gallery figure {
  margin: 0;
  flex: 0 1 calc((100% - 36px) / 3);
  min-width: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
}
.gallery figure.bright { background: var(--card); }
.gallery img {
  border-radius: 5px;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: 50% 40%;
}
.gallery figure.contain img {
  object-fit: contain;
  object-position: 50% 50%;
  background: var(--card);
}
/* per-tile crop control, add to the <figure> */
.gallery figure.crop-top img    { object-position: 50% 12%; }
.gallery figure.crop-upper img  { object-position: 50% 28%; }
.gallery figure.crop-center img { object-position: 50% 50%; }
.gallery figure.crop-lower img  { object-position: 50% 72%; }
  font-size: 0.78rem;
  color: var(--muted);
  padding-top: 10px;
  line-height: 1.5;
}

/* ---------- contact / footer ---------- */
.contact { text-align: center; padding: 88px 0 66px; }
.contact .bigmail {
  font-family: "Schibsted Grotesk", sans-serif;
  font-weight: 700;
  font-size: clamp(1.4rem, 4vw, 2.3rem);
  color: var(--ink);
  display: inline-block;
  margin: 10px 0 26px;
}
.contact .bigmail:hover { color: var(--green); text-decoration: none; }
.contact .out { display: flex; gap: 28px; justify-content: center; flex-wrap: wrap; }
footer {
  border-top: 1px solid var(--line);
  padding: 26px 0 56px;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
  background: var(--card);
}

/* ---------- article (research detail + resume) ---------- */
.article { max-width: 780px; margin-inline: auto; padding: 60px 24px 40px; }
.article .titleblock { margin-bottom: 38px; }
.article .meta {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.02em;
  display: flex;
  gap: 8px 26px;
  flex-wrap: wrap;
  padding: 13px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.article h2 { margin-top: 2.2em; }
.article figure {
  margin: 32px 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}
.article figure.bright { background: var(--card); }
.article figure img { border-radius: 5px; margin-inline: auto; }
.article figcaption {
  font-size: 0.78rem;
  color: var(--muted);
  padding-top: 12px;
  line-height: 1.55;
}
.article .backlink {
  display: inline-block;
  margin-bottom: 28px;
  font-size: 0.85rem;
  font-weight: 600;
}
.numbers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 30px 0;
}
.numbers .n {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}
.numbers .n b {
  display: block;
  font-family: "Schibsted Grotesk", sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--green);
}
.numbers .n span {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- resume page ---------- */
.resume h2 {
  font-size: 1rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
  border-bottom: 1px solid var(--line);
  padding-bottom: 8px;
  margin-top: 2.4em;
}
.resume .entry { margin-bottom: 26px; }
.resume .entry .head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  align-items: baseline;
}
.resume .entry .head b { font-family: "Schibsted Grotesk", sans-serif; font-size: 1.05rem; }
.resume .entry .head .when { font-size: 0.8rem; font-weight: 600; color: var(--muted); }
.resume .entry .role { color: var(--muted); font-style: italic; margin-bottom: 6px; }
.resume ul { margin: 8px 0 0; padding-left: 20px; }
.resume ul li { margin-bottom: 6px; }
.resume .skillrow { margin-bottom: 12px; }
.resume .skillrow b { color: var(--ink); }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .hero { padding: 52px 0 42px; }
  .hero .wrap { grid-template-columns: 1fr; gap: 38px; }
  .portrait-frame { order: -1; }
  .about-grid, .feature { grid-template-columns: 1fr; gap: 30px; }
  .feature.rev .media { order: 0; }
  .cards { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: 1fr 1fr; }
  .numbers { grid-template-columns: 1fr; }
}
@media (max-width: 860px) { .gallery figure { flex-basis: calc((100% - 18px) / 2); } }
@media (max-width: 560px) { .gallery figure { flex-basis: 100%; } }

@media (prefers-reduced-motion: reduce) {
  .rise { animation: none; }
  .btn, .card { transition: none; }
  html { scroll-behavior: auto; }
}

/* print: used by the resume page */
@media print {
  body { background: #ffffff; color: #111; }
  .nav, .btn-row, footer, .backlink { display: none; }
  a { color: #111; }
  .resume h2 { color: #111; border-color: #999; }
  .article { padding-top: 0; }
}