/* =====================================================================
   Design tokens
   A "working paper" aesthetic: parchment ground, bottle-green ink,
   a hairline spine down the left like a bound ledger, one warm gold
   rule as the sole recurring accent, dates set in a monospace to
   read like a register. Two serifs only: Fraunces for display,
   Source Serif 4 for reading text.
   ===================================================================== */

:root {
  --paper: #F1ECDC;
  --paper-panel: #E7E0C9;
  --ink: #212B20;
  --ink-soft: #52594B;
  --ink-faint: #83816F;
  --gold: #A2792E;
  --rule: #CBC1A0;
  --brick: #7B3B2C;

  --font-display: "Fraunces", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --font-body: "Source Serif 4", "Iowan Old Style", Charter, Georgia, serif;
  --font-mono: "IBM Plex Mono", "Courier New", monospace;

  --content-width: 900px;
  --sidebar-width: 260px;
  --gutter: clamp(20px, 4vw, 48px);
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--brick);
  text-decoration-color: var(--rule);
  text-underline-offset: 3px;
}
a:hover { text-decoration-color: var(--brick); }

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--brick);
  outline-offset: 3px;
}

/* ---------------------------------------------------------------------
   Site header: full-width banner, centered, at the very top
   --------------------------------------------------------------------- */

.site-header {
  padding: 56px var(--gutter) 32px;
  text-align: center;
}

.masthead {
  max-width: 980px;
  margin: 0 auto;
}

.masthead__eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--ink-faint);
  margin: 0 0 18px;
}

.masthead__title {
  font-family: var(--font-display);
  font-optical-sizing: auto;
  font-weight: 600;
  font-size: clamp(30px, 4.4vw, 44px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
}

.masthead__tagline {
  font-size: 18px;
  color: var(--ink-soft);
  max-width: 52ch;
  margin: 0 auto 10px;
}

.masthead__affiliation {
  font-size: 14.5px;
  color: var(--ink-faint);
  margin: 0;
}

/* ---------------------------------------------------------------------
   Page grid: highlighted sidebar (nav) on the left, content to its right
   --------------------------------------------------------------------- */

.page {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 40px var(--gutter) 64px;
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  gap: var(--gutter);
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 32px;
  background: var(--paper-panel);
  border-left: 3px solid var(--gold);
  padding: 28px 26px;
}

.content-col {
  min-width: 0; /* allow text to wrap instead of overflowing the grid track */
}

@media (max-width: 820px) {
  .page {
    display: block;
    padding: 32px var(--gutter) 56px;
  }
  .sidebar {
    position: static;
    margin-bottom: 36px;
  }
}

.rule {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 0;
}

.rule--gold {
  border-top: 2px solid var(--gold);
}

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

nav.toc {
  padding: 0;
}

.toc__label {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--gold);
  margin: 0 0 16px;
}

nav.toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 19px;
}

nav.toc a {
  color: var(--ink);
  text-decoration: none;
  border-left: 3px solid transparent;
  padding-left: 14px;
  display: block;
  line-height: 1.3;
}

nav.toc a:hover {
  color: var(--brick);
  border-left-color: var(--brick);
}

nav.toc a[aria-current="page"] {
  color: var(--brick);
  border-left-color: var(--gold);
  font-weight: 600;
}

@media (max-width: 820px) {
  .sidebar {
    border-left: none;
    border-top: 3px solid var(--gold);
  }
  nav.toc ul {
    flex-direction: row;
    flex-wrap: wrap;
    column-gap: 24px;
    row-gap: 12px;
    font-size: 17px;
  }
  nav.toc a {
    border-left: none;
    padding-left: 0;
    border-bottom: 2px solid transparent;
  }
  nav.toc a:hover {
    border-left-color: transparent;
    border-bottom-color: var(--brick);
  }
}

/* ---------------------------------------------------------------------
   Sections
   --------------------------------------------------------------------- */

section.block {
  padding: 52px 0;
}

section.block + section.block {
  border-top: 1px solid var(--rule);
}

.block__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 28px;
  margin: 0 0 20px;
  scroll-margin-top: 24px;
}

.block--welcome {
  text-align: center;
}

.block--welcome p {
  text-align: left;
  max-width: 68ch;
  margin-left: auto;
  margin-right: auto;
}

.block__title--center {
  font-size: clamp(34px, 5vw, 52px);
  margin-bottom: 28px;
}

.block__intro {
  color: var(--ink-soft);
  margin: 0 0 28px;
  max-width: 100%;
}

.block p {
  max-width: 100%;
}

.block p + p {
  margin-top: 1em;
}

/* ---- team --- */

.roster {
  display: flex;
  flex-direction: column;
}

.roster__item {
  padding: 22px 0;
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 4px 40px;
}

.roster__item + .roster__item {
  border-top: 1px solid var(--rule);
}

@media (max-width: 560px) {
  .roster__item { grid-template-columns: 1fr; }
}

.roster__namecol {
  display: flex;
  flex-direction: column;
}

.roster__photo {
  width: 96px;
  height: 96px;
  object-fit: cover;
  border: 1px solid var(--rule);
  margin-bottom: 10px;
}

.roster__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
}

.roster__role {
  font-style: italic;
  color: var(--gold);
  font-size: 15px;
  margin-top: 2px;
}

.roster__bio {
  color: var(--ink-soft);
  font-size: 16.5px;
  max-width: 100%;
}

/* ---- events --- */

.ledger {
  display: flex;
  flex-direction: column;
}

.ledger__row {
  padding: 18px 0;
}

.ledger__row + .ledger__row {
  border-top: 1px solid var(--rule);
}

.ledger__date {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--brick);
  margin: 0 0 6px;
}

.ledger__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.3;
  margin: 0 0 4px;
}

.ledger__desc {
  color: var(--ink-soft);
  font-size: 16px;
  margin: 0 0 4px;
  max-width: 80ch;
}

.ledger__loc {
  font-size: 14px;
  color: var(--ink-faint);
}

.ledger--empty {
  color: var(--ink-faint);
  font-style: italic;
  padding: 12px 0;
}

/* ---- panels (past activities: panel meta left, papers list right) --- */

.panel-list {
  display: flex;
  flex-direction: column;
}

.panel-row {
  padding: 24px 0;
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 6px 40px;
}

.panel-row + .panel-row {
  border-top: 1px solid var(--rule);
}

@media (max-width: 640px) {
  .panel-row { grid-template-columns: 1fr; }
}

.panel__date {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--brick);
  margin-bottom: 6px;
}

.panel__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.3;
  margin-bottom: 4px;
}

.panel__organizer {
  font-style: italic;
  color: var(--ink-soft);
  font-size: 14.5px;
}

.panel__papers-label {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--ink-faint);
  margin: 0 0 8px;
}

.panel__papers-list {
  margin: 0;
  padding-left: 1.2em;
  max-width: 70ch;
  color: var(--ink-soft);
  font-size: 16px;
}

.panel__papers-list li + li {
  margin-top: 0.6em;
}

/* ---- simple bullet list --- */

.simple-list {
  margin: 0;
  padding-left: 1.2em;
  max-width: 60ch;
}

.simple-list li + li {
  margin-top: 0.5em;
}

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

footer {
  padding: 40px 0 64px;
  color: var(--ink-faint);
  font-size: 14px;
}

footer a { color: var(--ink-faint); }
footer a:hover { color: var(--brick); }