/* Shared stylesheet for CoRe Safe AI @ CMU */

:root {
  --bg: #faf9f7;
  --text: #26231f;
  --secondary: #57524b;
  --muted: #8a8378;
  --soft: #6b665f;
  --rule: #e4dfd7;
  --accent: #97182f;
  --accent-dark: #6e1023;
  --serif: 'Source Serif 4', Georgia, serif;
  --sans: 'Source Sans 3', 'Helvetica Neue', Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scrollbar-gutter: stable;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
}

a:hover {
  color: var(--accent-dark);
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Header / navigation */
header {
  border-bottom: 1px solid var(--rule);
}

header .container {
  padding-top: 26px;
  padding-bottom: 20px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px 28px;
}

.site-title {
  font-weight: 700;
  font-size: 19px;
  color: var(--text);
  text-decoration: none;
}

.site-title span {
  font-weight: 400;
  color: var(--muted);
}

nav {
  display: flex;
  flex-wrap: wrap;
  max-width: 100%;
  gap: 10px 24px;
  font-family: var(--sans);
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

nav a {
  color: var(--secondary);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  padding-bottom: 3px;
}

nav a:hover {
  color: var(--accent);
}

nav a.current {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

@media (max-width: 680px) {
  header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  nav {
    column-gap: 16px;
  }
}

/* Content */
main {
  padding-top: 56px;
  padding-bottom: 80px;
}

h1 {
  margin: 0 0 40px;
  font-size: 34px;
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1.has-subtitle {
  margin-bottom: 8px;
}

.subtitle {
  margin: 0 0 40px;
  font-family: var(--sans);
  font-size: 15px;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.prose {
  font-size: 18px;
  line-height: 1.65;
  max-width: 640px;
}

.prose p {
  margin: 0 0 22px;
}

.prose p:last-child {
  margin-bottom: 0;
}

.aside {
  font-style: italic;
  color: var(--soft);
}

/* Publications */
.pub-list {
  max-width: 640px;
}

.pub {
  margin-bottom: 28px;
}

.pub p {
  margin: 0 0 4px;
}

.pub .title {
  font-size: 17px;
  line-height: 1.5;
  font-weight: 600;
}

.pub .title a {
  text-decoration: none;
  color: var(--text);
}

.pub .title a:hover {
  color: var(--accent);
}

.pub .authors {
  font-size: 15.5px;
  color: var(--secondary);
}

.pub .meta {
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--muted);
}

/* Events */
.event-list {
  max-width: 640px;
}

.event-list h2 {
  margin: 40px 0 20px;
  font-size: 22px;
  font-weight: 600;
}

.event-list h2:first-child {
  margin-top: 0;
}

.event {
  margin-bottom: 28px;
}

.event p {
  margin: 0 0 4px;
}

.event .date {
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.event .title {
  font-size: 17px;
  line-height: 1.5;
  font-weight: 600;
}

.event .title a {
  text-decoration: none;
  color: var(--text);
}

.event .title a:hover {
  color: var(--accent);
}

.event .meta {
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--muted);
}

/* People */
.people-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 40px 32px;
  max-width: 640px;
}

.person img,
.person .photo-placeholder {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 10px;
}

.person .photo-placeholder {
  background: repeating-linear-gradient(45deg, #eee9e1, #eee9e1 6px, var(--rule) 6px, var(--rule) 12px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: monospace;
  font-size: 11px;
  color: var(--muted);
}

.person .name {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.35;
}

.person .role {
  margin: 2px 0 0;
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--muted);
}

.person .description {
  margin: 10px 0 0;
  max-width: 280px;
  font-size: 15.5px;
  line-height: 1.5;
  color: var(--secondary);
}

/* Footer */
footer {
  border-top: 1px solid var(--rule);
}

footer .container {
  padding-top: 20px;
  padding-bottom: 28px;
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 24px;
}