:root {
  --bg: #fafaf8;
  --text: #1a1a1a;
  --muted: #5c5c5c;
  --accent: #1f5c4a;
  --border: #e2e0da;
  --mono: "SF Mono", "IBM Plex Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --max-width: 760px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.55;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

header.site {
  border-bottom: 1px solid var(--border);
  padding: 28px 0 0;
}

header.site .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px 24px;
  padding-bottom: 16px;
}

.site-name {
  font-size: 1.1rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--text);
  letter-spacing: -0.01em;
}

nav.tabs {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

nav.tabs a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.95rem;
  padding: 6px 12px;
  border-radius: 6px;
}

nav.tabs a:hover {
  color: var(--text);
  background: rgba(0,0,0,0.04);
}

nav.tabs a[aria-current="page"] {
  color: var(--text);
  font-weight: 600;
  background: rgba(31,92,74,0.09);
}

main {
  padding: 40px 0 80px;
}

h1 {
  font-size: 1.7rem;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 1.15rem;
  margin: 2.2em 0 0.6em;
  padding-top: 0.6em;
  border-top: 1px solid var(--border);
}

h2:first-of-type { border-top: none; padding-top: 0; }

p { margin: 0.6em 0; }

.tagline {
  color: var(--muted);
  font-size: 1.02rem;
  margin-top: 0;
}

.lede {
  color: var(--muted);
  max-width: 56ch;
}

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

code, pre {
  font-family: var(--mono);
  font-size: 0.88em;
}

pre {
  background: #f1efe9;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  overflow-x: auto;
}

.role {
  font-weight: 600;
  margin-bottom: 2px;
}

.role-meta {
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 6px;
}

ul.plain {
  padding-left: 1.1em;
  margin: 0.4em 0 1.1em;
}

ul.plain li { margin: 0.28em 0; }

.entry { margin-bottom: 1.5em; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 1.2em;
}

.card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  background: #fff;
}

.card h3 {
  margin: 0 0 6px;
  font-size: 1rem;
}

.card p {
  color: var(--muted);
  font-size: 0.92rem;
  margin: 0;
}

.card.placeholder {
  border-style: dashed;
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 90px;
  font-size: 0.92rem;
}

form.contact {
  margin-top: 1em;
  max-width: 480px;
}

form.contact label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin: 14px 0 4px;
}

form.contact input,
form.contact textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: var(--sans);
  font-size: 0.95rem;
  background: #fff;
}

form.contact textarea { min-height: 120px; resize: vertical; }

form.contact button {
  margin-top: 18px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 10px 20px;
  font-size: 0.95rem;
  cursor: pointer;
}

form.contact button:hover { opacity: 0.92; }

.form-note {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 10px;
}

.contact-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 1em 0 2em;
}

.contact-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--text);
  font-size: 0.92rem;
  background: #fff;
}

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

footer.site {
  border-top: 1px solid var(--border);
  padding: 20px 0 40px;
  color: var(--muted);
  font-size: 0.85rem;
}

.cv-note {
  font-size: 0.88rem;
  color: var(--muted);
  border-left: 3px solid var(--border);
  padding: 4px 0 4px 12px;
  margin: 1.4em 0;
}

/* ---------------------------------------------------------------- */
/* Molecule nav (home page) + cross-document view transitions        */
/* Route A: SVG + native View Transitions. Swappable later for a     */
/* real 3D renderer (Three.js / 3Dmol.js) without touching anything  */
/* else — the <a href> links and .vt-* names are the only contract.  */
/* ---------------------------------------------------------------- */

@view-transition {
  navigation: auto;
}

::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 0.45s;
}

.vt-cv { view-transition-name: atom-cv; }
.vt-projects { view-transition-name: atom-projects; }
.vt-contact { view-transition-name: atom-contact; }

::view-transition-new(atom-cv),
::view-transition-new(atom-projects),
::view-transition-new(atom-contact) {
  animation: atom-pop 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}

@keyframes atom-pop {
  from { transform: scale(0.82); opacity: 0.5; }
  to { transform: scale(1); opacity: 1; }
}

.molecule-hero {
  margin: 12px 0 8px;
  display: flex;
  justify-content: center;
}

.molecule-hero svg {
  width: 100%;
  max-width: 460px;
  height: auto;
  overflow: visible;
}

.molecule-hero .bond {
  stroke: var(--border);
  stroke-width: 3;
}

.molecule-hero .bond-inner {
  stroke: var(--border);
  stroke-width: 1.4;
}

.molecule-hero .atom {
  transform-box: fill-box;
  transform-origin: center;
  transition: transform 0.2s ease, filter 0.2s ease;
}

.molecule-hero a {
  cursor: pointer;
}

.molecule-hero a:hover .atom,
.molecule-hero a:focus-visible .atom {
  transform: scale(1.14);
  filter: drop-shadow(0 0 10px rgba(31, 92, 74, 0.55));
}

.molecule-hero a:focus-visible {
  outline: none;
}

.molecule-hero a:focus-visible .atom-o {
  filter: drop-shadow(0 0 0 3px var(--accent)) drop-shadow(0 0 10px rgba(31, 92, 74, 0.55));
}

.molecule-hero .label {
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 600;
  fill: var(--text);
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.molecule-hero a:hover .label,
.molecule-hero a:focus-visible .label {
  opacity: 1;
}

.molecule-caption {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 4px;
}