:root {
  --bg: #eef3f5;
  --bg-raised: #ffffff;
  --text: #101b22;
  --text-muted: #51636d;
  --accent: #0c7489;
  --accent-soft: #dcedf1;
  --border: #d3dfe3;
  --shadow: 0 1px 3px rgba(16, 27, 34, 0.08);
  --max-width: 720px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #071019;
    --bg-raised: #0d1b26;
    --text: #e2edf1;
    --text-muted: #8ea2ac;
    --accent: #5fd0e8;
    --accent-soft: #102b35;
    --border: #1c2e38;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  }
}

:root[data-theme="dark"] {
  --bg: #071019;
  --bg-raised: #0d1b26;
  --text: #e2edf1;
  --text-muted: #8ea2ac;
  --accent: #5fd0e8;
  --accent-soft: #102b35;
  --border: #1c2e38;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: "Fraunces", ui-serif, Georgia, serif;
  font-weight: 600;
  line-height: 1.15;
  text-wrap: balance;
  margin: 0 0 0.5em 0;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
a:hover { border-bottom-color: currentColor; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.topnav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.9rem max(1.25rem, calc((100% - var(--max-width)) / 2));
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.topnav .brand {
  font-family: "Fraunces", serif;
  font-weight: 600;
  color: var(--text);
  border: none;
  margin-right: auto;
  font-size: 1.05rem;
}
.navlinks { display: flex; gap: 1.25rem; }
.navlinks a {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  color: var(--text-muted);
  font-size: 0.8rem;
  white-space: nowrap;
}
.navlinks a:hover { color: var(--text); }

#theme-toggle {
  border: 1px solid var(--border);
  background: var(--bg-raised);
  color: var(--text);
  border-radius: 999px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}
#icon-moon { display: none; }
:root[data-theme="dark"] #icon-sun,
:root:not([data-theme="light"]) #icon-sun { display: none; }
:root[data-theme="dark"] #icon-moon,
:root:not([data-theme="light"]) #icon-moon { display: block; }
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) #icon-sun { display: block; }
  :root:not([data-theme]) #icon-moon { display: none; }
}

.hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3.5rem 1.25rem 2.5rem;
  text-align: center;
}
.photo-btn {
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
  border-radius: 50%;
}
.photo {
  width: 132px;
  height: 132px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--border);
  box-shadow: var(--shadow);
}
.hero h1 { font-size: 2.25rem; margin-top: 1.1rem; }
.hero .role { color: var(--text-muted); margin: 0.3rem 0 0; }
.hero .tags {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  color: var(--accent);
  font-size: 0.82rem;
  margin-top: 0.7rem;
  letter-spacing: 0.01em;
}

#photo-dialog {
  border: none;
  border-radius: 12px;
  padding: 0;
  background: var(--bg-raised);
  max-width: min(90vw, 480px);
}
#photo-dialog::backdrop { background: rgba(10, 14, 20, 0.7); }
#photo-dialog img { display: block; width: 100%; height: auto; }
#photo-close {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: none;
  background: rgba(0,0,0,0.55);
  color: #fff;
  font-size: 1.1rem;
  cursor: pointer;
  line-height: 1;
}

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

.block {
  padding: 2.75rem 0;
  border-top: 1px solid var(--border);
}
.block:first-child { border-top: none; }

.eyebrow {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.72rem;
  color: var(--accent);
  font-weight: 500;
  margin: 0 0 0.4rem;
}

.block h2 { font-size: 1.5rem; }
.block h3.subhead {
  font-size: 1.05rem;
  margin-top: 2rem;
}

.section-note {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.project-card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem 1.4rem;
  margin-top: 1.25rem;
  box-shadow: var(--shadow);
}
.project-card h3 { font-size: 1.05rem; margin-bottom: 0.5rem; }
.tag-row { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.8rem; }
.tag {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.72rem;
  padding: 0.22rem 0.6rem;
  border-radius: 4px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 500;
}

.pub-list, .record-list {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
}
.pub-item {
  padding: 1.25rem 0;
  border-top: 1px solid var(--border);
}
.pub-item:first-child { padding-top: 0; border-top: none; }
.pub-title {
  font-size: 1.02rem;
  margin: 0 0 0.75rem;
}
.pub-meta {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.4rem 1rem;
  margin: 0;
}
.pub-meta div { display: contents; }
.pub-meta dt {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.68rem;
  color: var(--text-muted);
  padding-top: 0.15rem;
}
.pub-meta dd {
  margin: 0;
  font-size: 0.92rem;
}
.pub-footer {
  margin-top: 1.25rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.record-list li {
  padding: 1rem 0;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.record-list li:first-child { border-top: none; }
.record-date {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 500;
}
.record-title { font-weight: 600; }
.record-org { color: var(--text-muted); font-size: 0.92rem; }
.record-list ul {
  margin: 0.4rem 0 0;
  padding-left: 1.1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.record-list.compact li { padding: 0.7rem 0; }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 1rem;
}
.skills-grid h4 { font-size: 0.95rem; margin-bottom: 0.3rem; }
.skills-grid p { margin: 0; color: var(--text-muted); font-size: 0.92rem; }

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin-top: 1.25rem;
}
.contact-grid a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.8rem 1rem;
  color: var(--text);
  font-weight: 500;
  font-size: 0.94rem;
}
.contact-grid a:hover { border-color: var(--accent); }
.contact-grid a span { color: var(--text-muted); }

footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.82rem;
  padding: 2rem 1.25rem 3rem;
}

@media (max-width: 640px) {
  .navlinks { display: none; }
  .skills-grid, .contact-grid { grid-template-columns: 1fr; }
  .pub-meta { grid-template-columns: 1fr; }
  .pub-meta dt { padding-top: 0.5rem; }
}