/* ----------------------------------------------------------------------- */
/* Alexander Puck Neuwirth — research site                                 */
/* Hand-written, no framework, no build step. Light/dark via               */
/* prefers-color-scheme only (no toggle: keeps the site JS-free).          */
/* ----------------------------------------------------------------------- */

:root {
  --bg: #fbfaf7;
  --bg-raised: #ffffff;
  --text: #1c1d1f;
  --text-muted: #55585e;
  --border: #e1ddd3;
  --accent: #7a3b2e;
  --accent-soft: #9c5a44;
  --link: #6b3528;
  --code-bg: #f1ede4;
  --tag-bg: #efe8da;
  --focus: #1468c9;
  --max-width: 46rem;
  --font-body: "Source Serif 4", Georgia, "Iowan Old Style", "Palatino Linotype", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15161a;
    --bg-raised: #1c1e23;
    --text: #e7e5df;
    --text-muted: #a7a9b0;
    --border: #32353d;
    --accent: #e0a98f;
    --accent-soft: #c98a6d;
    --link: #e8b79b;
    --code-bg: #20222a;
    --tag-bg: #262932;
    --focus: #5aa5ff;
  }
}

* { box-sizing: border-box; }
html { color-scheme: light dark; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--link);
  text-decoration-thickness: from-font;
  text-underline-offset: 0.12em;
}
a:hover { color: var(--accent); }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

img { max-width: 100%; }

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: var(--bg-raised);
  color: var(--text);
  padding: 0.75em 1em;
  border: 1px solid var(--border);
  border-radius: 0.25em;
  z-index: 100;
}
.skip-link:focus { left: 1em; top: 1em; }

/* Layout shell ----------------------------------------------------------- */

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

.site-header-inner {
  max-width: 58rem;
  margin: 0 auto;
  padding: 1.1rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
}

.site-name {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.01em;
  color: var(--text);
  text-decoration: none;
}
.site-name:hover { color: var(--accent); }

.site-nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1.1rem; font-size: 0.95rem; }
.site-nav a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.2em 0;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover, .site-nav a[aria-current="page"] {
  color: var(--text);
  border-bottom-color: var(--accent);
}

main { max-width: var(--max-width); margin: 0 auto; padding: 2.25rem 1.25rem 4rem; }
.wide main { max-width: 58rem; }

.site-footer { border-top: 1px solid var(--border); margin-top: 3rem; }
.site-footer-inner {
  max-width: 58rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 2.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
}
.site-footer a { color: var(--text-muted); }
.site-footer a:hover { color: var(--accent); }

/* Typography -------------------------------------------------------------*/

h1, h2, h3, h4 { font-family: var(--font-body); font-weight: 700; line-height: 1.25; color: var(--text); }
h1 { font-size: 1.9rem; margin: 0 0 0.6rem; }
h2 { font-size: 1.35rem; margin: 2.2rem 0 0.8rem; }
h3 { font-size: 1.1rem; margin: 1.6rem 0 0.6rem; }

p, ul, ol, dl, figure, table { margin: 0 0 1rem; }
ul, ol { padding-left: 1.3rem; }
li + li { margin-top: 0.3rem; }

.lede { font-size: 1.15rem; color: var(--text-muted); max-width: 42rem; }
.meta { color: var(--text-muted); font-size: 0.92rem; }

blockquote {
  margin: 1.2rem 0;
  padding: 0.2rem 1rem;
  border-left: 3px solid var(--border);
  color: var(--text-muted);
}

code, pre, kbd { font-family: var(--font-mono); font-size: 0.88em; }
code { background: var(--code-bg); padding: 0.12em 0.35em; border-radius: 0.3em; }
pre { background: var(--code-bg); padding: 0.9rem 1rem; border-radius: 0.4em; overflow-x: auto; }
pre code { background: none; padding: 0; }

hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }

table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
th, td { text-align: left; padding: 0.4rem 0.6rem; border-bottom: 1px solid var(--border); }

/* Components ---------------------------------------------------------------*/

.tag-list { list-style: none; padding: 0; margin: 0.5rem 0 1rem; display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tag-list li {
  margin: 0;
  background: var(--tag-bg);
  color: var(--text-muted);
  font-size: 0.8rem;
  font-family: var(--font-sans);
  padding: 0.2em 0.6em;
  border-radius: 1em;
}

.card-list { list-style: none; padding: 0; margin: 0 0 1rem; display: flex; flex-direction: column; gap: 1.35rem; }
.card { padding-bottom: 1.35rem; border-bottom: 1px solid var(--border); }
.card:last-child { border-bottom: none; padding-bottom: 0; }
.card h3 { margin-top: 0; font-size: 1.08rem; }
.card h3 a { text-decoration: none; }
.card h3 a:hover { text-decoration: underline; }
.card .meta { margin: 0.15rem 0 0.4rem; }
.card p { margin: 0.3rem 0; }

.link-row { display: flex; flex-wrap: wrap; gap: 0.3rem 1rem; font-size: 0.92rem; margin-top: 0.4rem; }

.status-badge {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.15em 0.55em;
  border-radius: 0.25em;
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.status-badge.is-active { border-color: var(--accent-soft); color: var(--accent); }

.home-section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.home-section-head a { font-size: 0.92rem; white-space: nowrap; }

.profile-links { list-style: none; padding: 0; margin: 1rem 0 0; display: flex; flex-wrap: wrap; gap: 0.4rem 1.2rem; font-size: 0.95rem; }

.research-grid { list-style: none; padding: 0; margin: 1rem 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap: 1rem; }
.research-grid li { margin: 0; border: 1px solid var(--border); border-radius: 0.5em; padding: 1rem 1.1rem; background: var(--bg-raised); }
.research-grid h3 { margin-top: 0; font-size: 1.02rem; }
.research-grid p { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 0; }

.cv-download {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  border: 1px solid var(--border);
  padding: 0.35em 0.8em;
  border-radius: 0.3em;
  text-decoration: none;
  font-size: 0.92rem;
}
.cv-download:hover { border-color: var(--accent-soft); }

.abstract { background: var(--bg-raised); border: 1px solid var(--border); border-radius: 0.5em; padding: 1rem 1.2rem; margin: 1rem 0; }
.abstract h2 { margin-top: 0; font-size: 1rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-muted); }

.future-work { border-left: 3px solid var(--border); padding-left: 1rem; color: var(--text-muted); }

.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

@media (max-width: 30rem) {
  h1 { font-size: 1.55rem; }
  body { font-size: 1.02rem; }
}

@media print {
  .site-header, .site-footer, .skip-link { display: none; }
  main { max-width: none; padding: 0; }
  a { color: inherit; text-decoration: underline; }
}