/* =========================================================
   Amanda Stoffers — personal academic site
   Clean minimal theme inspired by the al-folio layout.
   Accent: Cambridge blue. Light + dark mode.
   ========================================================= */

:root {
  /* Light mode: brighter Cambridge blue-green, deepened for legibility on white */
  --accent:        #2e9e74;
  --accent-soft:   #85b09a;   /* true Cambridge blue-green */
  --accent-hover:  #237a59;

  --bg:            #ffffff;
  --bg-soft:       #f6f8fa;
  --text:          #1f2328;
  --text-muted:    #5b6573;
  --border:        #e6e9ee;
  --card:          #ffffff;
  --shadow:        0 1px 2px rgba(16,24,40,.06), 0 6px 24px rgba(16,24,40,.05);
  --nav-bg:        rgba(255,255,255,.78);

  --maxw:          820px;
  --radius:        12px;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-head: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* ---- Night-sky theme (default) ---- */
html[data-theme="dark"] {
  --accent:        #8ce0b0;   /* brighter Cambridge blue-green */
  --accent-soft:   #85b09a;
  --accent-hover:  #b6f0d2;

  --bg:            #050711;   /* deep space */
  --bg-soft:       #0c1020;
  --text:          #e8eef6;
  --text-muted:    #93a0b4;
  --border:        rgba(140,224,176,.16);
  --card:          rgba(255,255,255,.035);
  --shadow:        0 1px 2px rgba(0,0,0,.5), 0 10px 34px rgba(0,0,0,.45);
  --nav-bg:        rgba(5,7,17,.6);
}

/* Starfield canvas sits behind everything (dark theme only) */
#stars {
  position: fixed;
  inset: 0;
  width: 100%; height: 100%;
  z-index: -1;
  display: none;
  pointer-events: none;
}
html[data-theme="dark"] #stars { display: block; }
html[data-theme="dark"] body {
  background:
    radial-gradient(1200px 700px at 78% -8%, rgba(133,176,154,.10), transparent 60%),
    radial-gradient(900px 600px at 10% 110%, rgba(108,182,227,.08), transparent 60%),
    var(--bg);
  background-attachment: fixed;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background .25s ease, color .25s ease;
}

/* ---------- Layout ---------- */
.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

main { padding: 120px 0 64px; min-height: 70vh; }

section { margin-bottom: 56px; }

/* ---------- Navbar ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -.01em;
  color: var(--text);
  text-decoration: none;
}
.brand:hover { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  list-style: none;
  margin: 0; padding: 0;
}
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: .96rem;
  font-weight: 500;
  transition: color .15s ease;
}
.nav-links a:hover,
.nav-links a.active { color: var(--accent); }

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 36px; height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: inline-flex;
  align-items: center; justify-content: center;
  font-size: .95rem;
  transition: all .2s ease;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }

.nav-toggle {
  display: none;
  background: none; border: none;
  color: var(--text);
  font-size: 1.3rem; cursor: pointer;
}

/* ---------- Typography ---------- */
h1, h2, h3 { font-family: var(--font-head); line-height: 1.2; letter-spacing: -.02em; }
h1 { font-size: 2.5rem; font-weight: 800; margin: 0 0 .1em; }
h2 {
  font-size: 1.5rem; font-weight: 700; margin: 0 0 .8em;
  padding-bottom: .35em; border-bottom: 1px solid var(--border);
}
h3 { font-size: 1.12rem; font-weight: 700; margin: 0 0 .3em; }
p { margin: 0 0 1.1em; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }
.muted { color: var(--text-muted); }

/* ---------- Home header ---------- */
.intro { display: flex; gap: 36px; align-items: flex-start; }
.intro-text { flex: 1 1 auto; }
.affil { font-size: 1.05rem; color: var(--text-muted); margin: .2em 0 1.4em; }

.profile {
  flex: 0 0 220px;
  width: 220px;
}
.profile img {
  width: 100%;
  border-radius: var(--radius);
  display: block;
  box-shadow: var(--shadow);
}
.profile .ph {
  width: 100%; aspect-ratio: 4/5;
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, var(--accent-soft), var(--accent));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: .8rem; text-align: center; padding: 16px;
  box-shadow: var(--shadow);
}
.profile figcaption { font-size: .82rem; color: var(--text-muted); margin-top: 8px; text-align: center; }

/* Inline photo inside the bio (e.g. rowing) — full text-column width */
.inline-photo { margin: 6px 0 22px; width: 100%; }
.inline-photo img {
  width: 100%; max-height: 460px; object-fit: cover;
  border-radius: var(--radius); display: block; box-shadow: var(--shadow);
}
.inline-photo figcaption { font-size: .82rem; color: var(--text-muted); margin-top: 8px; }

/* ---------- Social icons ---------- */
.social { display: flex; gap: 16px; margin: 22px 0 26px; font-size: 1.25rem; }
.social a { color: var(--text-muted); transition: color .15s ease, transform .15s ease; }
.social a:hover { color: var(--accent); transform: translateY(-2px); }

/* ---------- Buttons ---------- */
.btn-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 4px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px;
  border-radius: 8px;
  font-weight: 600; font-size: .95rem;
  border: 1px solid var(--accent);
  text-decoration: none;
  transition: all .15s ease;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color:#fff; text-decoration: none; }
.btn-ghost { background: transparent; color: var(--accent); }
.btn-ghost:hover { background: var(--bg-soft); text-decoration: none; }

/* ---------- Publications / lists ---------- */
.pub { display: flex; gap: 18px; padding: 18px 0; border-bottom: 1px solid var(--border); }
.pub:last-child { border-bottom: none; }
.pub-year {
  flex: 0 0 64px;
  font-weight: 700; color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.pub-body { flex: 1 1 auto; }
.pub-title { font-weight: 700; margin: 0 0 3px; }
.pub-authors { color: var(--text-muted); font-size: .95rem; margin: 0 0 4px; }
.pub-authors .me { color: var(--text); font-weight: 600; }
.pub-venue { font-size: .92rem; font-style: italic; color: var(--text-muted); margin: 0 0 8px; }
.tag {
  display: inline-block; font-size: .72rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .04em;
  padding: 2px 8px; border-radius: 999px; margin-left: 6px;
  background: var(--bg-soft); color: var(--text-muted);
  border: 1px solid var(--border); vertical-align: middle;
}
.links-inline a { font-size: .9rem; margin-right: 14px; font-weight: 600; }

/* ---------- Cards (code/projects) ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
  transition: transform .15s ease, box-shadow .15s ease;
}
.card:hover { transform: translateY(-2px); }
.card h3 { display: flex; align-items: center; gap: 10px; }
.card .repo { font-size: .9rem; color: var(--text-muted); font-weight: 500; }
.card .meta { font-size: .85rem; color: var(--text-muted); margin-top: 12px; }
.pill {
  display: inline-block; font-size: .75rem; font-weight: 600;
  padding: 2px 9px; border-radius: 999px; margin: 0 6px 6px 0;
  background: rgba(46,158,116,.10); color: var(--accent);
  border: 1px solid rgba(46,158,116,.28);
}
html[data-theme="dark"] .pill { background: rgba(140,224,176,.10); border-color: rgba(140,224,176,.30); }

/* ---------- Talks ---------- */
.talk { display: flex; gap: 18px; padding: 16px 0; border-bottom: 1px solid var(--border); }
.talk:last-child { border-bottom: none; }
.talk-date { flex: 0 0 110px; color: var(--text-muted); font-size: .9rem; }
.talk-body { flex: 1 1 auto; }
.talk-title { font-weight: 600; }
.talk-where { color: var(--text-muted); font-size: .92rem; }

/* ---------- CV ---------- */
.pdf-frame {
  width: 100%; height: 80vh;
  border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.note {
  background: var(--bg-soft); border: 1px dashed var(--border);
  border-radius: 8px; padding: 12px 16px; font-size: .9rem; color: var(--text-muted);
  margin-bottom: 22px;
}

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  color: var(--text-muted);
  font-size: .88rem;
  text-align: center;
}
footer .social { justify-content: center; font-size: 1.1rem; margin: 0 0 12px; }

/* ---------- Responsive ---------- */
@media (max-width: 680px) {
  body { font-size: 16px; }
  h1 { font-size: 2rem; }
  main { padding: 100px 0 48px; }
  .intro { flex-direction: column-reverse; align-items: center; text-align: center; }
  .profile { flex-basis: 180px; width: 180px; }
  .social { justify-content: center; }
  .btn-row { justify-content: center; }
  .pub, .talk { flex-direction: column; gap: 4px; }
  .pub-year { flex-basis: auto; }
  .talk-date { flex-basis: auto; }

  .nav-links {
    position: fixed; top: 64px; right: 0;
    flex-direction: column; align-items: flex-start;
    background: var(--bg); border: 1px solid var(--border);
    border-radius: 0 0 0 12px;
    padding: 16px 22px; gap: 14px;
    transform: translateX(110%); transition: transform .25s ease;
    box-shadow: var(--shadow);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-toggle { display: inline-block; }
}