/* metascience-seminars · Atlas */

:root {
  --paper:      #f7f0df;
  --paper-edge: #ede2c5;
  --ink:        #1a1714;
  --ink-soft:   #6a625a;
  --ocean:      #154e6b;
  --sienna:     #b5532d;
  --olive:      #8b8a6a;
  --grid:       rgba(139, 138, 106, 0.18);
  --rule:       #c8c0a9;
  --aff:        #6a625a;

  --font-display: 'Cormorant Garamond', Georgia, 'Iowan Old Style', serif;
  --font-body:    'IBM Plex Sans', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-mono:    'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper:      #14110d;
    --paper-edge: #1b1813;
    --ink:        #ece2cd;
    --ink-soft:   #968b7e;
    --ocean:      #6fb4d6;
    --sienna:     #e08658;
    --olive:      #bcb98c;
    --grid:       rgba(188, 185, 140, 0.13);
    --rule:       #3a342c;
    --aff:        #968b7e;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* faint contour-line backdrop — restrained, decorative */
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image:
    radial-gradient(ellipse 90% 60% at 15% 25%, transparent 58%, var(--grid) 58.5%, transparent 59%),
    radial-gradient(ellipse 90% 60% at 15% 25%, transparent 64%, var(--grid) 64.5%, transparent 65%),
    radial-gradient(ellipse 90% 60% at 15% 25%, transparent 70%, var(--grid) 70.5%, transparent 71%),
    radial-gradient(ellipse 80% 50% at 85% 85%, transparent 50%, var(--grid) 50.5%, transparent 51%),
    radial-gradient(ellipse 80% 50% at 85% 85%, transparent 57%, var(--grid) 57.5%, transparent 58%),
    radial-gradient(ellipse 80% 50% at 85% 85%, transparent 64%, var(--grid) 64.5%, transparent 65%);
  pointer-events: none;
  z-index: 0;
}
main, .masthead-inner, footer { position: relative; z-index: 1; }

main, .masthead-inner, footer {
  max-width: 78ch;
  margin: 0 auto;
  padding: 0 1.5rem;
}
main:has(.layout-with-rail) { max-width: 104ch; }

.layout-with-rail {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}
@media (min-width: 880px) {
  .layout-with-rail { grid-template-columns: minmax(0, 1fr) 24ch; }
}

/* ───────────── masthead ───────────── */

.masthead { padding-top: 3rem; }
.masthead-inner { padding-bottom: 0.5rem; }
.masthead h1 {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  font-size: clamp(2.2rem, 5.5vw, 3.4rem);
  letter-spacing: -0.005em;
  line-height: 1;
  margin: 0;
}
.masthead h1 a { color: inherit; text-decoration: none; }
.masthead .strap {
  margin: 0.5rem 0 0;
  color: var(--ink-soft);
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
}
.masthead .strap::before {
  content: '';
  display: inline-block;
  width: 0.55rem; height: 0.55rem;
  background: var(--sienna);
  border-radius: 50%;
  vertical-align: 1px;
  margin-right: 0.55rem;
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--sienna) 55%, transparent);
  animation: strap-pulse 2.4s ease-out infinite;
}
@keyframes strap-pulse {
  0%   { box-shadow: 0 0 0 0 color-mix(in srgb, var(--sienna) 55%, transparent); }
  70%  { box-shadow: 0 0 0 0.55rem transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}
@media (prefers-reduced-motion: reduce) {
  .masthead .strap::before { animation: none; }
}
.primary-nav {
  margin-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.primary-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  padding: 0.35rem 1rem 0.35rem 0;
  margin-right: 1rem;
  border-right: 1px solid var(--grid);
}
.primary-nav a:last-child { border-right: 0; margin-right: 0; padding-right: 0; }
.primary-nav a:hover { color: var(--ocean); }

.rule {
  border: none;
  border-top: 1px solid var(--ink);
  margin: 1.5rem 0 0;
  opacity: 0.85;
}

/* ───────────── headings ───────────── */

h2 {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  font-size: 1.7rem;
  letter-spacing: 0;
  text-transform: none;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 0.5rem;
  margin: 3rem 0 1.25rem;
}
.bucket h2, .recordings h2 { display: flex; align-items: baseline; gap: 0.9rem; }
.bucket h2::after, .recordings h2::after {
  content: '';
  flex: 1;
  border-top: 0;
  margin-top: 0;
}
h3 {
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 500;
  font-size: 1.35rem;
  line-height: 1.2;
  margin: 0 0 0.3rem;
}

a { color: var(--ink); }
a:hover { text-decoration: underline; text-decoration-color: var(--ocean); }

/* ───────────── filters ───────────── */

.filters {
  margin: 1.25rem 0 2rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
}
.filter-label {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  margin-right: 0.6rem;
  color: var(--ink-soft);
}
.mode-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
}
.camp-pill {
  margin-right: 0.5rem;
  padding: 0.05rem 0.3rem;
  border-bottom: 2px solid var(--camp, var(--ink-soft));
  text-decoration: none;
  font-style: italic;
  color: var(--ink);
}
.camp-pill.active { background: color-mix(in srgb, var(--camp, var(--ink-soft)) 18%, transparent); }

/* ───────────── talk rows + meridian rail ───────────── */

.bucket, .recordings { position: relative; }

.talk {
  position: relative;
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 1.5rem;
  border-bottom: 1px dashed var(--grid);
  padding: 1.1rem 0;
}
.talk:last-child { border-bottom: 0; }

/* the meridian rail per row — continuous between rows */
.talk::before {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  left: 4.75rem;
  width: 1px;
  background: var(--ink-soft);
  opacity: 0.28;
}
/* the pin on the rail */
.talk::after {
  content: '';
  position: absolute;
  top: 1.55rem;
  left: calc(4.75rem - 3px);
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--paper);
  border: 1px solid var(--ink);
  z-index: 1;
}
.talk[data-kind="conference"]::after {
  background: var(--sienna);
  border-color: var(--sienna);
}

.date-gutter {
  text-align: right;
  padding-right: 1.25rem;
  font-feature-settings: 'onum' 1;
}
.date-gutter .dow {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.15rem;
}
.date-gutter .dom {
  display: block;
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 500;
  font-size: 2.6rem;
  line-height: 0.92;
  color: var(--ink);
  font-feature-settings: 'onum' 1;
}
.date-gutter .mon {
  display: block;
  font-family: var(--font-display);
  font-style: italic;
  text-transform: none;
  font-size: 0.95rem;
  letter-spacing: 0;
  color: var(--ink);
  margin-top: 0.15rem;
}
.date-gutter .end-date {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
  margin-top: 0.25rem;
}
.date-gutter .gutter-conf-marker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.2em;
  padding: 0.08rem 0.35rem;
  margin-bottom: 0.4rem;
  border: 1px solid var(--sienna);
  text-transform: uppercase;
  color: var(--sienna);
  font-weight: 500;
}

.talk-body {
  border-left: 0;
  padding-left: 0.25rem;
}
.talk-body h3 a {
  color: var(--ink);
  text-decoration: none;
  background-image: linear-gradient(var(--ink-soft), var(--ink-soft));
  background-size: 100% 1px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  transition: background-image 0.12s;
}
.talk-body h3 a:hover {
  background-image: linear-gradient(var(--ocean), var(--ocean));
}
.talk-body .meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 0.4rem 0 0.2rem;
  color: var(--ink-soft);
}
.talk-body .meta time { color: var(--ink); }
.talk-body .meta .orig-tz { text-transform: none; letter-spacing: 0; color: var(--ink-soft); margin-left: 0.3rem; }
.talk-body { min-width: 0; }
.talk-body h3, .talk-body .speaker, .talk-body .meta, .talk-body .series {
  overflow-wrap: break-word;
  word-break: break-word;
}
.talk-body .speaker {
  margin: 0.2rem 0 0;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.05rem;
}
.talk-body .aff { color: var(--ink-soft); font-style: normal; font-family: var(--font-body); font-size: 0.92rem; }
.talk-body .series {
  margin: 0.4rem 0 0;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--ink-soft);
}
.talk-body .series a { color: inherit; text-decoration: none; border-bottom: 1px solid var(--grid); }
.talk-body .series a:hover { color: var(--ocean); border-bottom-color: var(--ocean); }

.kind-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sienna);
  font-weight: 500;
}

.add-to-cal-mini {
  font-family: var(--font-mono);
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.7rem;
  opacity: 0.8;
  color: var(--ink-soft);
}
.add-to-cal-mini:hover { opacity: 1; color: var(--ocean); }

/* ───────────── newsletter rail ───────────── */

.rail {
  border-top: 1px solid var(--grid);
  padding-top: 1.5rem;
  font-family: var(--font-body);
}
@media (min-width: 880px) {
  .rail {
    border-top: none;
    border-left: 1px solid var(--grid);
    padding-top: 0;
    padding-left: 1.75rem;
  }
}
.rail-h {
  margin: 0 0 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink-soft);
  font-weight: 500;
}
.rail-h a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--grid);
  padding-bottom: 1px;
}
.rail-h a:hover { color: var(--ocean); border-bottom-color: var(--ocean); }
.rail-blurb {
  margin: 0 0 1.75rem;
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--ink);
}
.rail-blurb a {
  color: var(--ocean);
  text-decoration: none;
  border-bottom: 1px solid var(--grid);
}
.rail-blurb a:hover { border-bottom-color: var(--ocean); }
.rail-divider {
  margin: 0 0 1.75rem;
  border-top: 1px solid var(--grid);
}
.rail-list { list-style: none; padding: 0; margin: 0; }
.rail-item {
  margin-bottom: 1.4rem;
  padding-bottom: 1.4rem;
  border-bottom: 1px dashed var(--grid);
}
.rail-item:last-child { border-bottom: 0; }
.rail-title {
  font-family: var(--font-body);
  font-style: normal;
  font-weight: 500;
  font-size: 0.95rem;
  line-height: 1.35;
  display: inline-block;
  color: var(--ink);
  text-decoration: none;
  background-image: linear-gradient(var(--grid), var(--grid));
  background-size: 100% 1px;
  background-repeat: no-repeat;
  background-position: 0 100%;
}
.rail-title:hover {
  background-image: linear-gradient(var(--ocean), var(--ocean));
}
.rail-meta {
  margin: 0.35rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.rail-series { font-weight: 500; }
.rail-summary {
  margin: 0.45rem 0 0;
  font-size: 0.86rem;
  color: var(--ink-soft);
  line-height: 1.5;
  font-style: italic;
  font-family: var(--font-display);
}
.rail-more, .rail-empty {
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.rail-more a, .rail-empty a { color: var(--ocean); text-decoration: none; border-bottom: 1px solid var(--grid); }

/* ───────────── newsletter index page ───────────── */

.newsletter-list { list-style: none; padding: 0; margin: 2rem 0 0; }
.newsletter-row {
  padding: 1.25rem 0;
  border-bottom: 1px dashed var(--grid);
}
.newsletter-row:last-child { border-bottom: 0; }
.newsletter-head { display: flex; align-items: baseline; flex-wrap: wrap; gap: 0.6rem; }
.newsletter-title {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  font-size: 1.4rem;
  text-decoration: none;
  color: var(--ink);
}
.newsletter-title:hover { color: var(--ocean); }
.newsletter-slug {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: transparent;
  border: 1px solid var(--grid);
  padding: 0.1rem 0.5rem;
}
.newsletter-latest {
  margin: 0.5rem 0 0;
  font-size: 0.95rem;
  line-height: 1.5;
}
.latest-label {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.66rem;
  color: var(--ink-soft);
  margin-right: 0.45rem;
  font-weight: 500;
}
.latest-title { font-weight: 500; }
.latest-date {
  margin-left: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}
.newsletter-empty { color: var(--ink-soft); font-style: italic; }
.lede { color: var(--ink-soft); margin-bottom: 2rem; font-size: 1.05rem; line-height: 1.55; font-family: var(--font-display); font-style: italic; }

/* ───────────── talk detail ───────────── */

.talk-detail .kicker {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--ink-soft);
  font-size: 0.74rem;
  margin: 1.5rem 0 0.5rem;
}
.talk-detail h1 {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  font-size: clamp(2rem, 4.5vw, 2.8rem);
  line-height: 1.1;
  margin: 0 0 0.75rem;
}
.talk-detail h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  text-transform: none;
  border: none;
  letter-spacing: 0;
  font-style: italic;
  font-weight: 500;
  margin: 2rem 0 0.75rem;
  padding-bottom: 0;
}
.talk-detail .abstract { font-size: 1rem; line-height: 1.65; }
.abstract { margin-top: 1.5rem; }
.abstract h3 { margin-bottom: 0.5rem; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.14em; font-size: 0.75rem; color: var(--ink-soft); }
.ai-summary {
  margin-top: 1rem;
  font-size: 0.95rem;
  color: var(--ink-soft);
  font-style: italic;
  font-family: var(--font-display);
}
.ai-summary-label {
  font-style: normal;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--ink);
  margin-right: 0.3rem;
}
.talk-actions { margin-top: 1.25rem; }
.talk-actions .add-to-cal {
  display: inline-block;
  margin-left: 0.4rem;
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--ink);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
}
.talk-actions .add-to-cal:hover { background: var(--ink); color: var(--paper); }

.recording-flag {
  display: inline-block;
  border: 1px solid var(--ocean);
  color: var(--ocean);
  padding: 0.1rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
/* Past-talks page uses the same date-gutter / talk-body structure as the
   front page but adds a year line below the month (past spans multiple
   years), so the gutter gets a touch more vertical room. */
.talk.past { grid-template-columns: 5rem 1fr; }
.talk.past::before { left: 5.25rem; }
.talk.past::after { left: calc(5.25rem - 3px); }
.date-gutter .year {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-top: 0.25rem;
}

.past-abstract { margin-top: 0.8rem; font-size: 0.92rem; line-height: 1.6; }
.past-abstract > summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
}
.past-abstract[open] > summary { margin-bottom: 0.5rem; }
.past-abstract p { margin: 0.5rem 0; }

.receipt {
  margin-top: 2.5rem;
  border-top: 1px solid var(--grid);
  padding-top: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
}
.receipt summary { cursor: pointer; text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.7rem; }

.recordings { margin-top: 4rem; }

.camp-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem;
}
@media (max-width: 720px) { .camp-grid { grid-template-columns: 1fr; } }
@media (min-width: 1080px) { .camp-grid { grid-template-columns: repeat(3, 1fr); } }

.camp-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-right: 0.5rem;
  padding-bottom: 1px;
  border-bottom: 2px solid var(--camp, var(--ink-soft));
  color: var(--ink-soft);
}

footer {
  margin: 5rem auto 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--grid);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
footer a { color: var(--ink-soft); border-bottom: 1px solid var(--grid); text-decoration: none; }
footer a:hover { color: var(--ocean); border-bottom-color: var(--ocean); }

table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; }
table th, table td {
  text-align: left;
  padding: 0.55rem 0.6rem;
  border-bottom: 1px solid var(--grid);
  font-size: 0.92rem;
}
table th {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.72rem;
  color: var(--ink-soft);
  font-weight: 500;
}

code { font-family: var(--font-mono); font-size: 0.88em; }

@media (max-width: 540px) {
  .talk { grid-template-columns: 3.5rem 1fr; gap: 1rem; }
  .talk::before { left: 3.75rem; }
  .talk::after { left: calc(3.75rem - 3px); top: 1.2rem; }
  .date-gutter { padding-right: 0.75rem; }
  .date-gutter .dom { font-size: 2.1rem; }
  .masthead h1 { font-size: 2rem; }
}