/* ==========================================================================
   dguthresearch.com — hand-built static site, 2026
   Type:  Newsreader (display serif) / IBM Plex Sans (body) / IBM Plex Mono (data rail)
   ========================================================================== */

:root {
  --bg: #faf9f6;
  --surface: #ffffff;
  --ink: #1e2733;
  --muted: #5c6675;
  --faint: #8a93a1;
  --line: #e4e1d8;
  --accent: #0e7766;
  --accent-strong: #0a5a4e;
  --accent-soft: #e3efec;
  --amber: #9a6a1f;
  --amber-soft: #f5ecd9;
  --shadow: 0 1px 3px rgba(30, 39, 51, 0.07);
  --radius: 6px;
}

[data-theme="dark"] {
  --bg: #14171b;
  --surface: #1b1f25;
  --ink: #e7e4dc;
  --muted: #a0a8b2;
  --faint: #79828d;
  --line: #2b313a;
  --accent: #4cc2aa;
  --accent-strong: #6fd6c1;
  --accent-soft: #1d2b29;
  --amber: #d4a85a;
  --amber-soft: #2b2620;
  --shadow: none;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease, color 0.15s ease;
}
a:hover { border-bottom-color: var(--accent); }

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

/* ---- header ------------------------------------------------------------ */

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}

.site-header .wrap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  padding-top: 1.4rem;
  padding-bottom: 1.4rem;
}

.site-name {
  font-family: "Newsreader", Georgia, serif;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  border-bottom: none;
}
.site-name:hover { color: var(--accent); border-bottom: none; }

.site-nav {
  display: flex;
  align-items: baseline;
  gap: 1.4rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
}

.site-nav a {
  color: var(--muted);
  border-bottom: none;
  padding-bottom: 2px;
}
.site-nav a:hover { color: var(--accent); }
.site-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom: 2px solid var(--accent);
}

#theme-toggle {
  background: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  cursor: pointer;
  padding: 0.15rem 0.55rem;
  transition: color 0.15s ease, border-color 0.15s ease;
}
#theme-toggle:hover { color: var(--accent); border-color: var(--accent); }

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

.hero {
  padding: 3.5rem 0 2.75rem;
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 168px;
  gap: 2.5rem;
  align-items: start;
}

.hero h1 {
  font-family: "Newsreader", Georgia, serif;
  font-size: clamp(2.3rem, 5.5vw, 3.1rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.12;
  margin: 0 0 1.1rem;
}

.hero .thesis {
  font-size: 1.18rem;
  line-height: 1.6;
  color: var(--ink);
  max-width: 36em;
  margin: 0 0 1rem;
}

.hero .thesis strong { font-weight: 600; }

.hero p { color: var(--muted); max-width: 38em; margin: 0 0 0.8rem; }

.portrait {
  width: 168px;
  height: 168px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

/* signature: career trajectory line */
.trajectory {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.84rem;
  color: var(--faint);
  margin: 1.6rem 0 0;
  letter-spacing: 0.01em;
}
.trajectory .tnow { color: var(--accent); font-weight: 500; }
.trajectory .tsep { color: var(--line); margin: 0 0.45rem; }

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.interests {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 1.2rem 0 0;
  padding: 0;
  list-style: none;
}
.interests li {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.14rem 0.65rem;
  white-space: nowrap;
}

/* ---- buttons / chips ----------------------------------------------------- */

.btn {
  display: inline-block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  padding: 0.32rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  background: var(--surface);
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}
.btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}
.btn-primary:hover { background: var(--accent-strong); color: #ffffff; }
[data-theme="dark"] .btn-primary { color: #10211d; }

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

main { padding-bottom: 4rem; }

.section { padding-top: 2.75rem; }

.eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin: 0 0 1.1rem;
}

.page-title {
  font-family: "Newsreader", Georgia, serif;
  font-size: clamp(2rem, 4.5vw, 2.6rem);
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 2.5rem 0 0.6rem;
}

.page-intro { color: var(--muted); max-width: 44em; margin: 0 0 1rem; }

h2.section-title {
  font-family: "Newsreader", Georgia, serif;
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 0.4rem;
}

.section-note { color: var(--muted); font-size: 0.95rem; margin: 0 0 1.6rem; }

/* ---- news ---------------------------------------------------------------- */

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

.news-list li {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 1.25rem;
  padding: 0.55rem 0;
  border-bottom: 1px dotted var(--line);
}
.news-list li:last-child { border-bottom: none; }

.news-date {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  color: var(--faint);
  padding-top: 0.25rem;
  white-space: nowrap;
}

/* ---- paper entries (the ledger) ------------------------------------------ */

.paper {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 1.25rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--line);
}
.paper:last-child { border-bottom: none; }

.paper-rail {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  color: var(--faint);
  padding-top: 0.3rem;
}
.paper-rail .year {
  display: block;
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink);
}
.paper-rail .status {
  display: block;
  margin-top: 0.35rem;
  color: var(--amber);
  font-size: 0.72rem;
  line-height: 1.45;
}

.paper h3 {
  font-family: "Newsreader", Georgia, serif;
  font-size: 1.32rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  line-height: 1.3;
  margin: 0 0 0.4rem;
}
.paper h3 a { color: var(--ink); border-bottom: none; }
.paper h3 a:hover { color: var(--accent); }

.paper .authors {
  font-size: 0.95rem;
  color: var(--muted);
  margin: 0 0 0.25rem;
}
.paper .authors strong { color: var(--ink); font-weight: 600; }

.paper .venue {
  font-size: 0.95rem;
  color: var(--muted);
  margin: 0 0 0.7rem;
}
.paper .venue em { font-style: italic; }

.tags { margin: 0 0 0.8rem; display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tag {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--accent-strong);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 0.12rem 0.6rem;
  white-space: nowrap;
}

.paper-links { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.4rem; }

.paper details {
  margin-top: 0.5rem;
  border-left: 2px solid var(--line);
  padding-left: 0.9rem;
}
.paper details[open] { border-left-color: var(--accent); }
.paper summary {
  cursor: pointer;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  user-select: none;
}
.paper summary:hover { color: var(--accent); }
.paper details p {
  font-size: 0.95rem;
  color: var(--muted);
  margin: 0.6rem 0 0.2rem;
}

.paper details pre {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.74rem;
  line-height: 1.5;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.8rem 1rem;
  margin: 0.6rem 0 0.2rem;
  overflow-x: auto;
}

.press {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0.5rem 0 0.2rem;
}
.press .press-label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--faint);
  margin-right: 0.4rem;
}

/* works in progress — compact rows */
.wip-list { list-style: none; margin: 0; padding: 0; }
.wip-list li {
  padding: 0.7rem 0;
  border-bottom: 1px dotted var(--line);
  font-size: 0.97rem;
}
.wip-list li:last-child { border-bottom: none; }
.wip-list .wip-title { font-weight: 600; }
.wip-list .wip-authors { color: var(--muted); font-size: 0.9rem; }
.wip-list .wip-status {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  color: var(--amber);
  background: var(--amber-soft);
  border-radius: 999px;
  padding: 0.1rem 0.55rem;
  margin-left: 0.4rem;
  white-space: nowrap;
}

/* ---- resources ------------------------------------------------------------ */

.resource-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.4rem 1.6rem;
  margin-bottom: 1.4rem;
}
.resource-card h3 {
  font-family: "Newsreader", Georgia, serif;
  font-size: 1.3rem;
  font-weight: 600;
  margin: 0 0 0.4rem;
}
.resource-card p { color: var(--muted); font-size: 0.97rem; margin: 0 0 0.8rem; }
.resource-card .filemeta {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
  color: var(--faint);
  margin: 0.6rem 0 0;
}

.viz-frame {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #ffffff;
  margin: 0.4rem 0 0.8rem;
}
.viz-frame img { width: 100%; display: block; }

/* ---- cv page --------------------------------------------------------------- */

.cv-block { margin-bottom: 0.5rem; }

.cv-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  padding: 0.55rem 0;
  border-bottom: 1px dotted var(--line);
  align-items: baseline;
}
.cv-row:last-child { border-bottom: none; }
.cv-row .cv-main strong { font-weight: 600; }
.cv-row .cv-sub { display: block; color: var(--muted); font-size: 0.92rem; }
.cv-row .cv-date {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  color: var(--faint);
  white-space: nowrap;
}

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

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 2rem;
  padding: 2.2rem 0 2.6rem;
  color: var(--muted);
  font-size: 0.92rem;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
  margin-bottom: 1rem;
}
.site-footer .fineprint { color: var(--faint); font-size: 0.8rem; }

/* ---- 404 ---------------------------------------------------------------------- */

.lost {
  font-family: "IBM Plex Mono", monospace;
  text-align: center;
  padding: 4rem 0;
}
.lost pre {
  display: inline-block;
  text-align: left;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem 2rem;
  overflow-x: auto;
  max-width: 100%;
}
.lost .glyph { color: var(--accent); font-weight: 600; }
.lost h1 { font-family: "IBM Plex Mono", monospace; font-size: 1.3rem; }

/* ---- print (CV page) --------------------------------------------------------------- */

@media print {
  body { background: #ffffff; color: #000000; font-size: 11pt; }
  .site-header, .site-footer, #theme-toggle, .btn { display: none !important; }
  .page-title { margin-top: 0; }
  a { color: #000000; }
  .cv-row { break-inside: avoid; }
}

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

@media (max-width: 640px) {
  .hero-grid { grid-template-columns: 1fr; }
  .portrait { width: 120px; height: 120px; order: -1; }
  .paper, .news-list li { grid-template-columns: 1fr; gap: 0.3rem; }
  .paper-rail { padding-top: 0; }
  .paper-rail .year { display: inline; margin-right: 0.6rem; }
  .paper-rail .status { display: inline; margin: 0; }
  .site-nav { gap: 1rem; }
}