/* ==========================================================================
   GRAVITY ACROSS SCALES (BRUCEFEST 2027)
   European Physics Workshop — Editorial Print Stylesheet
   ========================================================================== */

:root {
  --paper: #f8f6f0;
  --paper-alt: #f1ede3;
  --ink: #171a1e;
  --ink-secondary: #434952;
  --ink-muted: #6e747d;
  --accent: #8b3828; /* Deep Italian terracotta / Venetian red */
  --rule: #d5cec0;
  --rule-dark: #171a1e;

  --font-serif: 'EB Garamond', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --max-width: 1020px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 68px;
}

body {
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 19px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(248, 246, 240, 0.96);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--rule);
}

.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
}

.site-id {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink);
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.35rem;
}

.site-nav a {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--ink-secondary);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

/* ==========================================================================
   MASTHEAD
   ========================================================================== */
.masthead {
  padding: 3.75rem 0 3rem;
}

.masthead-meta {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: 1rem;
}

.meta-sep {
  color: var(--ink-muted);
}

.text-link-btn {
  background: none;
  border: none;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: none;
  color: var(--ink-secondary);
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}

.text-link-btn:hover {
  color: var(--accent);
}

.masthead-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.8rem, 5.4vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin-bottom: 0.9rem;
}

.masthead-subtitle {
  display: block;
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.75rem, 3.2vw, 2.55rem);
  color: var(--ink-secondary);
  margin-top: 0.2rem;
}

.masthead-dedication {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--ink);
  border-top: 1px solid var(--rule-dark);
  padding-top: 0.9rem;
  margin-top: 1.35rem;
  margin-bottom: 2.25rem;
}

.masthead-figure {
  margin: 0;
}

.masthead-figure img {
  display: block;
  width: 100%;
  max-height: 490px;
  object-fit: cover;
  object-position: center 42%;
  border: 1px solid var(--rule);
}

.masthead-figure figcaption {
  font-family: var(--font-sans);
  font-size: 0.76rem;
  color: var(--ink-muted);
  margin-top: 0.55rem;
  text-align: right;
}

/* ==========================================================================
   ASYMMETRIC EDITORIAL SECTIONS
   ========================================================================== */
.editorial-section {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 3rem;
  padding: 3.25rem 0;
  border-top: 1px solid var(--rule);
}

.section-sidebar {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.section-num {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 0.2rem;
}

.section-heading {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 500;
  line-height: 1.2;
  color: var(--ink);
}

.section-body {
  min-width: 0;
}

.editorial-prose p {
  margin-bottom: 1.15rem;
  color: var(--ink);
  max-width: 66ch;
}

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

.sub-label {
  font-family: var(--font-sans);
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-muted);
  margin: 2.25rem 0 0.85rem;
}

/* ==========================================================================
   TWO-COLUMN TOPICS LIST (CLEAN TYPOGRAPHIC INDEX)
   ========================================================================== */
.topics-index {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  column-gap: 2.5rem;
  border-top: 1px solid var(--rule);
}

.topics-index li {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--rule);
  font-size: 1.05rem;
  color: var(--ink);
}

.topic-num {
  font-family: var(--font-sans);
  font-size: 0.74rem;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  min-width: 1.5rem;
}

/* ==========================================================================
   BRUCE ALLEN PORTRAIT & NOTE
   ========================================================================== */
.tribute-split {
  display: grid;
  grid-template-columns: 210px 1fr;
  gap: 2rem;
  align-items: start;
}

.tribute-portrait {
  margin: 0;
}

.tribute-portrait img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--rule);
}

.tribute-portrait figcaption {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  line-height: 1.4;
  color: var(--ink-muted);
  margin-top: 0.45rem;
}

/* ==========================================================================
   STATUS NOTES & TABLES (PROGRAM, REGISTRATION, SPEAKERS)
   ========================================================================== */
.status-note {
  font-style: italic;
  color: var(--ink-secondary);
  margin-bottom: 1.5rem;
  max-width: 64ch;
}

.table-wrap {
  overflow-x: auto;
}

.editorial-table {
  width: 100%;
  border-collapse: collapse;
  border-top: 1px solid var(--rule-dark);
  border-bottom: 1px solid var(--rule-dark);
  font-size: 0.98rem;
}

.editorial-table th {
  font-family: var(--font-sans);
  font-size: 0.74rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  text-align: left;
  padding: 0.65rem 0.75rem 0.65rem 0;
  border-bottom: 1px solid var(--rule);
}

.editorial-table td {
  padding: 0.72rem 0.75rem 0.72rem 0;
  border-bottom: 1px solid var(--rule);
  color: var(--ink);
  vertical-align: top;
}

.editorial-table tr:last-child td {
  border-bottom: none;
}

.td-muted {
  color: var(--ink-muted);
  font-style: italic;
}

/* Ledger rows for Registration & Payment */
.ledger-list {
  border-top: 1px solid var(--rule);
  margin-top: 1.25rem;
  margin-bottom: 1.5rem;
}

.ledger-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 1.5rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--rule);
  font-size: 0.98rem;
}

.ledger-label {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--ink-secondary);
  font-weight: 500;
}

.ledger-value {
  color: var(--ink);
}

.editorial-links-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 1rem;
  font-family: var(--font-sans);
  font-size: 0.84rem;
}

.editorial-link {
  color: var(--accent);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.editorial-link-inactive {
  color: var(--ink-muted);
}

/* ==========================================================================
   VENUE & TRAVEL DIRECTIONS
   ========================================================================== */
.directions-list {
  border-top: 1px solid var(--rule);
  margin-top: 1.5rem;
}

.direction-item {
  padding: 1rem 0;
  border-bottom: 1px solid var(--rule);
}

.direction-title {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.25rem;
}

.direction-text {
  font-size: 0.98rem;
  color: var(--ink-secondary);
  max-width: 64ch;
}

/* ==========================================================================
   COMMITTEE DIRECTORY
   ========================================================================== */
.directory-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  column-gap: 2.5rem;
  border-top: 1px solid var(--rule);
}

.directory-grid li {
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
}

.dir-name {
  font-weight: 500;
  color: var(--ink);
}

.dir-affil {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  color: var(--ink-muted);
}

.coord-block {
  margin-top: 1.75rem;
  padding-top: 1rem;
}

.coord-role {
  font-family: var(--font-sans);
  font-size: 0.74rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  margin-bottom: 0.25rem;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--rule-dark);
  margin-top: 2rem;
  padding: 2rem 0 3rem;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  color: var(--ink-muted);
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-title {
  color: var(--ink);
  font-weight: 500;
}

.footer-sep {
  margin: 0 0.4rem;
}

.back-to-top {
  color: var(--ink-secondary);
  text-decoration: none;
}

.back-to-top:hover {
  color: var(--accent);
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS
   ========================================================================== */
@media (max-width: 780px) {
  .editorial-section {
    grid-template-columns: 1fr;
    gap: 1.25rem;
    padding: 2.25rem 0;
  }

  .topics-index,
  .directory-grid,
  .tribute-split,
  .ledger-row {
    grid-template-columns: 1fr;
  }

  .tribute-portrait {
    max-width: 240px;
  }
}