:root {
  /* colours of www.archetai.gr */
  --ink: #333333;
  --muted: #666666;
  --rule: #c9c7b8;
  --rule-light: #e4e2d9;
  --accent: #556997;      /* the Society's blue (header rule) */
  --accent-dark: #3f5079;
  --bg: #ffffff;
  --band: #ecebe4;        /* header background */
  --band-dark: #d4d2c2;   /* darker panel */
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Noto Serif", Georgia, "Times New Roman", serif;
  font-size: 17px;
  line-height: 1.6;
}

.wrap { max-width: 980px; margin: 0 auto; padding: 0 20px; }

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

/* ---------- header / footer ---------- */
.society-bar {
  background: var(--band);
  border-bottom: 2px solid var(--accent);
}
.society-inner { padding-top: 0; padding-bottom: 0; }
.society-logo { display: inline-block; line-height: 0; }
.society-logo img { width: 430px; max-width: 100%; height: auto; display: block; }

.conf-head {
  text-align: center;
  padding: 34px 0 26px;
  border-bottom: 1px solid var(--rule-light);
}
.conf-head p { margin: 0; }
.site-title {
  display: block;
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.25;
  color: var(--ink);
  text-decoration: none;
}
.conf-head .subtitle,
.conf-head .place-date,
.conf-head .venue {
  font-family: inherit;
  font-size: 1rem;
  font-style: normal;
  font-weight: 400;
  line-height: 1.55;
  color: var(--ink);
}
.conf-head .subtitle { margin-top: 6px; }
.conf-head .place-date { margin-top: 12px; }
.site-footer {
  margin-top: 64px;
  background: var(--band);
  border-top: 2px solid var(--accent);
  padding: 20px 0 32px;
  font-family: "Noto Sans", Arial, sans-serif;
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
}

main { padding-top: 24px; }
.page-title { font-size: 1.6rem; line-height: 1.3; margin: 24px 0 8px; }
.page-title.centered { text-align: center; margin-bottom: 16px; }

/* ---------- programme ---------- */
.day-nav {
  display: flex; flex-wrap: wrap; gap: 8px 12px; justify-content: center;
  font-family: "Noto Sans", Arial, sans-serif; font-size: 0.95rem;
  margin: 8px 0 0;
}
.day-nav a {
  text-decoration: none; border: 1px solid var(--band-dark); border-radius: 4px;
  padding: 5px 14px; color: var(--ink); background: var(--band);
}
.day-nav a:hover { border-color: var(--accent); color: #fff; background: var(--accent); }

h2 {
  font-size: 1.4rem;
  margin-top: 3.5rem;
  margin-bottom: 0.4rem;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--accent);
  scroll-margin-top: 16px;
}

table { width: 100%; border-collapse: collapse; }
th { padding: 0; height: 0; }
td { padding: 6px 8px; vertical-align: top; }
td:nth-child(1), td:nth-child(2) {
  font-family: "Noto Sans", Arial, sans-serif; font-size: 0.92rem;
  white-space: nowrap; color: var(--muted); font-variant-numeric: tabular-nums;
}

/* speakers column */
.session-paper td:nth-child(3) { font-weight: 600; color: var(--ink); }

table a {
  color: var(--ink);
  text-decoration-line: underline;
  text-decoration-style: dotted;
  text-decoration-thickness: 1px;
  text-decoration-color: #999;
  text-underline-offset: 3px;
}
table a:hover, table a:focus { color: var(--accent); text-decoration-style: solid; text-decoration-color: var(--accent); }

.session-start td {
  border-top: 1.5px solid var(--rule);
  padding-top: 22px;
  padding-bottom: 8px;
  font-weight: bold;
  color: var(--accent);
}
h2 + table tr.session-start td,
h2 + table tr.independent-session td { border-top: none; }
.session-end td { padding-bottom: 20px; }

.independent-session td {
  border-top: 1.5px solid var(--rule);
  border-bottom: 1.5px solid var(--rule);
  padding-top: 16px; padding-bottom: 16px;
  font-weight: 600;
}
.break-row td {
  background: var(--band);
  border-top: 1.5px solid var(--rule);
  border-bottom: 1.5px solid var(--rule);
  padding-top: 12px; padding-bottom: 12px;
}
.break-row td:nth-child(4) { font-style: italic; }
.chair-row td { padding-top: 0; padding-bottom: 10px; font-style: italic; color: var(--accent); }
.break-row + tr.chair-row td { padding-top: 12px; }
.break-row + tr.session-start td,
.break-row + tr.independent-session td { border-top: none; }

/* phones: one block per row */
@media (max-width: 640px) {
  body { font-size: 16px; }
  table, tbody, tr, td { display: block; width: 100%; }
  tr:first-child { display: none; }               /* empty width row */
  tr { padding: 6px 0; }
  td { padding: 2px 0; }
  td:empty { display: none; }
  tr:not(.session-start):not(.chair-row) > td:nth-child(1), tr:not(.session-start):not(.chair-row) > td:nth-child(2) { display: inline-block; width: auto; padding-right: 4px; }
  tr:not(.session-start):not(.chair-row) > td:nth-child(1):not(:empty)::after { content: " –"; }
  td:nth-child(3) { font-size: 1.05rem; }
  .session-start td { padding-top: 18px; }
  .session-start, .independent-session, .break-row { padding: 0; }
  .independent-session td, .break-row td { border: none; }
  .independent-session, .break-row { border-top: 1.5px solid var(--rule); border-bottom: 1.5px solid var(--rule); padding: 10px 0; }
  .break-row { background: var(--band); padding-left: 8px; }
  .break-row td { background: none; }
  h2 + table tr:nth-child(2) { border-top: none; }
}

/* ---------- abstracts ---------- */
.abstract { max-width: 760px; margin: 0 auto; }
.back-top { font-family: "Noto Sans", Arial, sans-serif; font-size: 0.9rem; margin: 8px 0 0; }
.back-top a { text-decoration: none; }
.abstract-subtitle { font-size: 1.15rem; font-style: italic; margin-top: 0; }
.authors { font-size: 1.25rem; font-weight: 600; color: var(--accent); line-height: 1.4; }
.affiliation { font-family: "Noto Sans", Arial, sans-serif; color: var(--muted); font-size: 0.95rem; margin-top: 2px !important; }
.byline { margin: 0 0 28px; padding-left: 14px; border-left: 3px solid var(--accent); }
.byline p { margin: 0; }
.abstract h2 {
  font-size: 1rem; text-transform: uppercase; letter-spacing: 0.08em;
  border-bottom: 1px solid var(--rule-light); margin-top: 2rem;
  font-family: "Noto Sans", Arial, sans-serif; color: var(--muted);
}
.abstract p { text-align: left; hyphens: manual; overflow-wrap: break-word; }
.abstract hr { border: none; border-top: 1px solid var(--rule-light); margin: 32px 0 12px; }

.intro { text-align: center; color: var(--muted); font-style: italic; margin: 4px 0 12px; }

/* ---------- venue ---------- */
.conf-head .venue { margin-top: 8px; }
.conf-head .venue a {
  color: inherit;
  text-decoration-color: var(--rule);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.conf-head .venue a:hover,
.conf-head .venue a:focus-visible { color: var(--accent-dark); text-decoration-color: currentColor; }
.nowrap { white-space: nowrap; }
.venue-map p { margin: 8px 0 14px; }
.venue-map iframe { width: 100%; height: 420px; border: 1px solid var(--rule); display: block; }
@media (max-width: 640px) { .venue-map iframe { height: 300px; } }

/* Conference identity */
.conference-logo { display: inline-block; max-width: 100%; line-height: 0; }
.conference-logo img { display: block; width: 238px; height: auto; max-width: 100%; max-height: 304px; margin: 0 auto; }

.conference-title { margin: 12px auto 0 !important; max-width: 840px; }
.day-nav + h2 { margin-top: 2rem; }

/* Compact identity on abstract pages keeps the paper above the fold. */
.abstract-masthead {
  padding: 12px 0;
  background: var(--band);
  border-bottom: 1px solid var(--accent);
  font-family: "Noto Sans", Arial, sans-serif;
  font-size: 0.9rem;
  line-height: 1.5;
}
.abstract-masthead .wrap { max-width: 800px; }
.abstract-masthead a { color: var(--ink); text-decoration: none; }
.abstract-masthead a:hover,
.abstract-masthead a:focus-visible { text-decoration: underline; }
.abstract-page main { max-width: 800px; padding-top: 12px; }