/* Salvatore D. Pace — academic site
   Notes:
   - No frameworks, no external fonts.
   - Uses CSS variables for easy theming.
*/

:root{
  --bg: #ffffff;
  --surface: #f7f8fb;
  --surface-2: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --muted-2: #64748b;
  --border: rgba(15, 23, 42, 0.12);
  --shadow: 0 10px 30px rgba(2, 6, 23, 0.08);
  --accent: #2563eb;
  --accent-2: #7c3aed;
  --focus: 0 0 0 4px rgba(37, 99, 235, 0.25);

  --radius: 16px;
  --radius-sm: 12px;
  --max: 1040px;
  --pad: 24px;

  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
}

:root[data-theme="dark"]{
  --bg: #0b0f14;
  --surface: #111827;
  --surface-2: #0f172a;
  --text: #e5e7eb;
  --muted: #a8b3cf;
  --muted-2: #93a4c7;
  --border: rgba(226, 232, 240, 0.14);
  --shadow: 0 14px 40px rgba(0,0,0,0.35);
  --accent: #60a5fa;
  --accent-2: #c4b5fd;
  --focus: 0 0 0 4px rgba(96, 165, 250, 0.25);
}

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

body{
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  background: radial-gradient(900px 600px at 10% -10%, rgba(37,99,235,0.10), transparent 70%),
              radial-gradient(900px 600px at 90% 10%, rgba(124,58,237,0.10), transparent 65%),
              var(--bg);
  line-height: 1.55;
}

a{ color: var(--accent); text-decoration: none; }
a:hover{ text-decoration: underline; }
a:focus-visible, button:focus-visible, input:focus-visible{
  outline: none;
  box-shadow: var(--focus);
  border-radius: 10px;
}

.skip-link{
  position: absolute;
  left: -999px;
  top: 12px;
  padding: 10px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  z-index: 1000;
}
.skip-link:focus{ left: 12px; }

.wrap{
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.site-header{
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: color-mix(in oklab, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--border);
}

.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0;
}

.brand{
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 220px;
}
.brand a{
  color: var(--text);
  text-decoration: none;
}
.brand-name{
  font-weight: 750;
  letter-spacing: -0.02em;
  font-size: 16px;
}
.brand-sub{
  color: var(--muted);
  font-size: 13px;
}

.nav{
  display: flex;
  align-items: center;
  gap: 14px;
}
.nav a{
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  padding: 8px 10px;
  border-radius: 10px;
}
.nav a:hover{ color: var(--text); background: color-mix(in oklab, var(--surface) 75%, transparent); }
.nav a[data-active="true"]{
  color: var(--text);
  background: color-mix(in oklab, var(--surface) 85%, transparent);
  border: 1px solid var(--border);
}

.header-actions{
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 85%, transparent);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 12px;
  cursor: pointer;
  font-size: 14px;
}
.icon-btn:hover{
  background: color-mix(in oklab, var(--surface) 92%, transparent);
}
.icon{
  width: 18px;
  height: 18px;
  display: inline-block;
}

.menu-btn{ display: none; }

main{ padding: 28px 0 80px; }

section{
  padding: 34px 0;
  scroll-margin-top: 84px;
}
.section-head{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 16px;
}
.section-head h2{
  margin: 0;
  font-size: 20px;
  letter-spacing: -0.02em;
}
.section-kicker{
  color: var(--muted);
  font-size: 14px;
}

.card{
  border: 1px solid var(--border);
  background: linear-gradient(180deg, color-mix(in oklab, var(--surface) 95%, transparent), color-mix(in oklab, var(--surface-2) 95%, transparent));
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero{
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 20px;
  padding: 22px;
}

.portrait-wrap{
  display: grid;
  place-items: start;
}
.portrait{
  width: 100%;
  max-width: 260px;
  aspect-ratio: 5/4;
  border-radius: 18px;
  object-fit: cover;
  border: 1px solid var(--border);
  background: var(--surface);
}
.portrait-fallback{
  width: 100%;
  max-width: 260px;
  aspect-ratio: 5/4;
  border-radius: 18px;
  display: none;
  place-items: center;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 92%, transparent);
  color: var(--muted);
  font-weight: 800;
  font-size: 42px;
  letter-spacing: -0.05em;
}

.hero h1{
  margin: 0 0 6px;
  font-size: 30px;
  letter-spacing: -0.03em;
}
.hero .lede{
  color: var(--muted);
  margin: 0 0 14px;
  max-width: 72ch;
}
.badges{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0 16px;
}
.badge{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 90%, transparent);
  color: var(--muted);
  font-size: 13px;
}

.quicklinks{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 12px 0 0;
}
.chip{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 90%, transparent);
  color: var(--text);
  font-size: 13px;
  text-decoration: none;
}
.chip:hover{ background: color-mix(in oklab, var(--surface) 96%, transparent); text-decoration: none; }
.chip:active{ transform: translateY(1px); }

.grid-2{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.cv-list{
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}
.cv-line{
  display: flex;
  justify-content: space-between;
  gap: 14px;
}
.cv-strong{ font-weight: 650; }
.cv-muted{ color: var(--muted); white-space: nowrap; }
.cv-extra{ color: var(--muted); font-size: 13px; margin-top: 6px; }

.prose{
  color: var(--text);
  max-width: 78ch;
}
.prose p{ margin: 0 0 14px; }
.prose ul{ margin: 10px 0 0; }

.lists-2{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
ul.clean{
  margin: 8px 0 0;
  padding-left: 18px;
  color: var(--text);
}
ul.clean li{ margin: 6px 0; color: var(--text); }
ul.clean li::marker{ color: var(--muted); }

.tools{
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 10px 0 12px;
}
.tools input{
  width: min(520px, 100%);
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 92%, transparent);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  font-size: 14px;
}
.tools .count{
  color: var(--muted);
  font-size: 13px;
}

.pub-list{
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 14px;
}
.pub-item{
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: color-mix(in oklab, var(--surface) 90%, transparent);
  padding: 14px 14px 12px;
}
.pub-head{
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.pub-num{
  font-family: var(--mono);
  color: var(--muted);
  font-size: 13px;
}
.pub-title{
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}
.pub-title:hover{ text-decoration: underline; }
.pub-meta{
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  color: var(--muted);
  font-size: 13px;
  margin-top: 6px;
}
.pub-authors{ color: var(--muted); }
.pub-venue{ color: var(--muted); }
.pub-year{
  color: var(--muted);
  font-family: var(--mono);
}
.pub-links{ margin-top: 10px; display: flex; gap: 8px; flex-wrap: wrap; }

.year-heading{
  margin: 18px 0 10px;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.talk-list{
  list-style: none;
  padding: 0;
  margin: 0 0 10px;
  display: grid;
  gap: 12px;
}
.talk-item{
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: color-mix(in oklab, var(--surface) 90%, transparent);
  padding: 14px 14px 12px;
}
.talk-main{
  display: flex;
  justify-content: space-between;
  gap: 16px;
}
.talk-where{
  display: grid;
  gap: 2px;
}
.talk-host{ font-weight: 650; }
.talk-sub{ color: var(--muted); font-size: 13px; }
.talk-when{
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  white-space: nowrap;
}
.talk-links{ margin-top: 10px; display: flex; gap: 8px; flex-wrap: wrap; }

.teaching-list{
  list-style: none;
  padding: 0;
  margin: 10px 0 0;
  display: grid;
  gap: 12px;
}
.teaching-item{
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: color-mix(in oklab, var(--surface) 90%, transparent);
  padding: 14px 14px 12px;
}
.teaching-main{
  display: flex;
  justify-content: space-between;
  gap: 16px;
}
.teaching-role{ font-weight: 650; }
.teaching-term{
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  white-space: nowrap;
}
.teaching-links{ margin-top: 10px; display: flex; gap: 8px; flex-wrap: wrap; }
.teaching-sub{ margin-top: 6px; color: var(--muted); font-size: 13px; }

.service-list{
  list-style: none;
  padding: 0;
  margin: 10px 0 0;
  display: grid;
  gap: 10px;
}
.service-item{
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 12px;
  border-radius: 12px;
  background: color-mix(in oklab, var(--surface) 85%, transparent);
  border: 1px solid var(--border);
}
.service-years{
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  white-space: nowrap;
}
.service-item a{ color: var(--text); text-decoration: none; }
.service-item a:hover{ text-decoration: underline; }

.footer{
  padding: 24px 0 36px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
}
.footer a{ color: var(--muted); }

.small{
  font-size: 13px;
  color: var(--muted);
}

@media (max-width: 880px){
  .hero{ grid-template-columns: 1fr; }
  .portrait-wrap{ place-items: center; }
  .brand-sub{ display: none; }
  .grid-2{ grid-template-columns: 1fr; }
  .lists-2{ grid-template-columns: 1fr; }
}

@media (max-width: 760px){
  .nav{ display: none; }
  .menu-btn{ display: inline-flex; }
  .nav.open{
    display: flex;
    position: absolute;
    left: 0;
    right: 0;
    top: 58px;
    padding: 12px var(--pad);
    border-bottom: 1px solid var(--border);
    background: color-mix(in oklab, var(--bg) 92%, transparent);
    backdrop-filter: blur(12px);
    gap: 8px;
    flex-wrap: wrap;
  }
}

@media print{
  .site-header, .header-actions, .quicklinks, .tools, .chip{ display: none !important; }
  body{ background: #fff; }
  .card{ box-shadow: none; }
}

button.chip{ cursor:pointer; }
button.chip{ font-family: inherit; }
button.chip{ border: 1px solid var(--border); }
button.chip{ background: color-mix(in oklab, var(--surface) 90%, transparent); }
button.chip:hover{ background: color-mix(in oklab, var(--surface) 96%, transparent); }
button.chip{ color: var(--text); }
button.chip{ padding: 7px 12px; border-radius: 999px; }
button.chip{ display: inline-flex; align-items: center; gap: 8px; }
button.chip{ font-size: 13px; }
button.chip{ appearance: none; }