/* ============================================================
   William Fassbender — personal site
   Design language: clean nav + landscape hero (kk.org),
   reverse-chronological work timeline (kevinroose.com),
   tagline + expanded bio + affiliation buttons (rushkoff.com)
   ============================================================ */

:root {
  --paper: #faf8f4;
  --paper-raised: #ffffff;
  --ink: #1c2024;
  --ink-soft: #4a5058;
  --line: #e4ddd0;
  --accent: #2f6f76;      /* muted teal — sky/tech */
  --accent-dark: #234f54;
  --amber: #c1782f;       /* warm accent — Montana sunset */
  --focus: #2f6f76;

  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --max-width: 780px;
  --nav-height: 72px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #16181b;
    --paper-raised: #1e2126;
    --ink: #eee9e0;
    --ink-soft: #b7b0a3;
    --line: #33363b;
    --accent: #6fbcc4;
    --accent-dark: #8fd0d6;
    --amber: #e0a15c;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
  transition: text-decoration-color .15s ease;
}
a:hover { text-decoration-color: currentColor; }

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 .5em;
  color: var(--ink);
}

h1 { font-size: clamp(2rem, 5vw, 2.75rem); }
h2 { font-size: 1.5rem; margin-top: 2.5em; }
h3 { font-size: 1.15rem; }

p { margin: 0 0 1.1em; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.wide { max-width: 920px; }

/* ---------- Nav ---------- */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(250, 248, 244, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
@media (prefers-color-scheme: dark) {
  .site-nav { background: rgba(22, 24, 27, 0.9); }
}

.site-nav .container {
  max-width: 920px;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-nav .brand {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: .01em;
}

.site-nav ul {
  list-style: none;
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 0;
}

.site-nav a.nav-link {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: .95rem;
  font-weight: 500;
  letter-spacing: .01em;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
}
.site-nav a.nav-link:hover,
.site-nav a.nav-link.active {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

.nav-toggle { display: none; }

@media (max-width: 640px) {
  .site-nav ul { gap: 18px; }
  .site-nav a.nav-link { font-size: .88rem; }
}

/* ---------- Hero ---------- */

.hero-art {
  width: 100%;
  height: clamp(220px, 34vw, 380px);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.hero-art svg { width: 100%; height: 100%; display: block; }

.hero-caption {
  max-width: 920px;
  margin: 0 auto;
  padding: 6px 24px 0;
  font-size: .78rem;
  color: var(--ink-soft);
  text-align: right;
}

/* ---------- Intro / masthead block ---------- */

.masthead {
  padding: 48px 0 8px;
}
.masthead-row {
  display: flex;
  align-items: flex-start;
  gap: 28px;
  flex-wrap: wrap;
}
.masthead-photo {
  width: 112px;
  height: 112px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--line);
  flex-shrink: 0;
}
.masthead-text { flex: 1; min-width: 240px; }

.tagline {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--ink-soft);
  margin: .3em 0 0;
}

.role-line {
  color: var(--ink-soft);
  font-size: .95rem;
  margin-top: .6em;
}

/* ---------- Buttons ---------- */

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 1.6em 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--paper-raised);
  color: var(--ink);
  font-size: .88rem;
  font-weight: 500;
  text-decoration: none;
  transition: border-color .15s ease, transform .1s ease, color .15s ease;
}
.btn:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
  text-decoration: none;
}
.btn.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #fff;
}

/* ---------- Affiliation pills (Rushkoff-style, under bio) ---------- */

.affiliation-row {
  padding-top: 20px;
  margin-top: 1.8em;
  border-top: 1px solid var(--line);
}

.btn-affiliation {
  font-weight: 600;
  text-decoration: none;
}

/* ---------- Timeline (homepage highlighted work) ---------- */

.timeline {
  margin-top: 1.2em;
}

.timeline-item {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 18px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}
.timeline-item:first-child { border-top: none; }

.timeline-year {
  font-family: var(--serif);
  font-size: 1rem;
  color: var(--amber);
  font-weight: 600;
  padding-top: 2px;
}

.timeline-tag {
  display: inline-block;
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--accent-dark);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border-radius: 4px;
  padding: 2px 7px;
  margin-bottom: 6px;
}

.timeline-title {
  font-family: var(--serif);
  font-size: 1.08rem;
  font-weight: 600;
  margin: 0 0 .25em;
}

.timeline-desc {
  color: var(--ink-soft);
  font-size: .95rem;
  margin: 0;
}

.timeline-venue {
  font-style: italic;
}

@media (max-width: 560px) {
  .timeline-item { grid-template-columns: 1fr; gap: 4px; }
  .timeline-year { color: var(--amber); }
}

/* ---------- Publications list (research page) ---------- */

.pub-list {
  list-style: none;
  margin: 0 0 2em;
  padding: 0;
}
.pub-list li {
  padding: 14px 0;
  border-top: 1px solid var(--line);
  font-size: .96rem;
}
.pub-list li:first-child { border-top: none; }
.pub-year {
  color: var(--amber);
  font-weight: 600;
  margin-right: 6px;
}
.pub-authors { color: var(--ink-soft); }
.pub-venue { font-style: italic; color: var(--ink-soft); }

.section-note {
  color: var(--ink-soft);
  font-size: .92rem;
  margin-top: -.6em;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 64px;
  padding: 28px 0 48px;
  color: var(--ink-soft);
  font-size: .85rem;
}
.site-footer a { color: var(--ink-soft); }

/* ---------- Page header (about/research/contact) ---------- */

.page-header {
  padding: 56px 0 8px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: .78rem;
  color: var(--accent-dark);
  font-weight: 600;
  margin-bottom: .6em;
}

main { padding-bottom: 40px; }

section.block { margin-bottom: 2.4em; }