/* GPS 2021 — rebuilt from the Wayback archive.

   The original Google Sites theme is not recoverable: its stylesheet was served from a versioned
   Google host that no longer answers, and no image survives. The palette below is therefore
   declared rather than restored — limestone paper, basalt slate, and a rust accent taken from the
   subject matter (oxidised iron in sedimentary rock), not from the lost original. */

:root {
  --gp-paper: #f5f2ec;
  --gp-card: #ffffff;
  --gp-ink: #191c1f;
  --gp-body: #3f464d;
  --gp-muted: #5f666d;
  --gp-line: #ddd7cc;
  --gp-rust: #9c3f16;
  --gp-rust-deep: #7c3111;
  --gp-rust-soft: #f6ebe4;
  --gp-slate: #1e262c;
  --gp-slate-2: #2a343c;
  --gp-on-slate: #eae6de;
  --gp-on-slate-dim: #b6bfc7;
  --gp-wrap: 1080px;
}

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

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

body {
  margin: 0;
  background: var(--gp-paper);
  color: var(--gp-body);
  font: 400 17px/1.65 Inter, "Segoe UI", system-ui, sans-serif;
}

h1, h2, h3 {
  font-family: "Source Serif 4", Georgia, serif;
  color: var(--gp-ink);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 .5em;
}

h1 { font-size: clamp(30px, 4.6vw, 46px); }
h2 { font-size: clamp(23px, 2.8vw, 30px); }
h3 { font-size: 20px; }

p { margin: 0 0 1em; }
a { color: var(--gp-rust); }
a:hover { color: var(--gp-rust-deep); }

.gp-wrap { width: 100%; max-width: var(--gp-wrap); margin: 0 auto; padding: 0 22px; }

.gp-skip {
  position: absolute; left: -9999px; top: 0; z-index: 10;
  background: var(--gp-slate); color: var(--gp-on-slate); padding: 10px 16px;
}
.gp-skip:focus { left: 0; }

/* --- header ------------------------------------------------------------------------------- */

.gp-head { background: var(--gp-slate); }

.gp-head-in {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 10px 24px; padding-top: 14px; padding-bottom: 14px;
}

.gp-brand {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 21px; font-weight: 600; letter-spacing: .01em;
  color: var(--gp-on-slate); text-decoration: none; white-space: nowrap;
}
.gp-brand span { color: #e08a55; }
.gp-brand em { font-style: normal; color: var(--gp-on-slate-dim); }

.gp-nav { display: flex; flex-wrap: wrap; gap: 4px 20px; }

.gp-nav a {
  color: var(--gp-on-slate-dim); text-decoration: none; font-size: 15px;
  padding: 4px 0; border-bottom: 2px solid transparent;
}
.gp-nav a:hover { color: #fff; }
.gp-nav a[aria-current="page"] { color: #fff; border-bottom-color: #e08a55; }

/* --- PBN strip ---------------------------------------------------------------------------- */

.gp-strip {
  background: var(--gp-rust-soft);
  border-bottom: 1px solid var(--gp-line);
  font-size: 15px;
}
.gp-strip p { margin: 0; padding: 11px 0; color: var(--gp-body); }

/* --- hero --------------------------------------------------------------------------------- */

.gp-hero { position: relative; background: var(--gp-slate-2); overflow: hidden; }

.gp-strata { position: absolute; inset: 0; display: flex; flex-direction: column; }
.gp-strata i { display: block; flex: 1; }
.gp-strata i:nth-child(1) { background: #33404a; }
.gp-strata i:nth-child(2) { background: #2c3841; }
.gp-strata i:nth-child(3) { background: #263038; }
.gp-strata i:nth-child(4) { background: #202930; }
.gp-strata i:nth-child(5) { background: #1a2228; }

.gp-hero-in { position: relative; padding-top: 58px; padding-bottom: 58px; }
.gp-hero h1 { color: #fff; max-width: 20ch; }

.gp-kicker {
  font-size: 13px; letter-spacing: .16em; text-transform: uppercase;
  color: #e08a55; margin-bottom: .8em;
}

.gp-hero .gp-sub {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(18px, 2.2vw, 23px); color: var(--gp-on-slate); max-width: 34ch;
}

.gp-when {
  color: var(--gp-on-slate-dim); font-size: 15px;
  border-top: 1px solid rgba(255,255,255,.16); padding-top: 14px; max-width: 46ch;
}

/* --- buttons ------------------------------------------------------------------------------ */

.gp-cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 1.4em 0 0; }

.gp-btn {
  display: inline-block; background: var(--gp-rust); color: #fff; text-decoration: none;
  padding: 12px 22px; font-weight: 500; font-size: 16px; border: 1px solid var(--gp-rust);
}
.gp-btn:hover { background: var(--gp-rust-deep); border-color: var(--gp-rust-deep); color: #fff; }

.gp-btn-ghost { background: transparent; color: var(--gp-rust); }
.gp-hero .gp-btn-ghost { color: #fff; border-color: rgba(255,255,255,.5); }
.gp-hero .gp-btn-ghost:hover { background: rgba(255,255,255,.1); border-color: #fff; }
.gp-btn-ghost:hover { background: var(--gp-rust-soft); color: var(--gp-rust-deep); }

/* --- sections ----------------------------------------------------------------------------- */

.gp-sect { padding: 46px 0; }
.gp-sect-alt { background: var(--gp-card); border-block: 1px solid var(--gp-line); }

.gp-page-head { background: var(--gp-slate); padding: 46px 0 40px; }
.gp-page-head h1 { color: #fff; margin-bottom: 0; }
.gp-page-head .gp-lede {
  color: var(--gp-on-slate-dim); max-width: 60ch; margin: .8em 0 0; font-size: 18px;
}

.gp-prose { max-width: 70ch; }
.gp-prose h2 { margin-top: 0; }

.gp-note {
  font-size: 13px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--gp-muted); margin: 1.6em 0 .8em;
}
.gp-note-inline {
  font-size: 15px; color: var(--gp-muted); border-left: 3px solid var(--gp-line);
  padding-left: 14px; max-width: 66ch;
}

/* --- day list (home) ---------------------------------------------------------------------- */

.gp-days { list-style: none; margin: 0 0 1.4em; padding: 0; }
.gp-days li { border-top: 1px solid var(--gp-line); padding: 16px 0; }
.gp-days li:last-child { border-bottom: 1px solid var(--gp-line); }

.gp-day {
  font-size: 13px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--gp-rust); margin: 0 0 .35em;
}

.gp-day-title { margin: 0; font-size: 18px; }
.gp-day-title a { color: var(--gp-ink); text-decoration: none; }
.gp-day-title a:hover { color: var(--gp-rust); text-decoration: underline; }

.gp-days-side .gp-day { color: var(--gp-muted); }

.gp-follow { max-width: 70ch; }

/* --- organisations ------------------------------------------------------------------------ */

.gp-orgs {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
}
.gp-orgs li {
  border: 1px solid var(--gp-line); padding: 16px 18px; background: var(--gp-paper);
}
.gp-orgs a { text-decoration: none; }
.gp-org-abbr {
  display: block; font-family: "Source Serif 4", Georgia, serif;
  font-size: 21px; font-weight: 600; color: var(--gp-ink);
}
.gp-orgs a .gp-org-abbr { color: var(--gp-rust); }
.gp-org-name { display: block; font-size: 15px; color: var(--gp-muted); margin-top: 3px; }
.gp-orgs-proj { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }

/* --- programme ---------------------------------------------------------------------------- */

.gp-toc { padding-bottom: 0; }
.gp-toc ol { margin: 0; padding-left: 1.3em; }
.gp-toc li { margin-bottom: .5em; }

.gp-part {
  font-size: 13px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--gp-muted); font-family: Inter, sans-serif; font-weight: 600;
  border-bottom: 1px solid var(--gp-line); padding-bottom: 10px; margin-bottom: 26px;
}

.gp-session {
  border-top: 3px solid var(--gp-rust); background: var(--gp-card);
  padding: 26px 26px 30px; margin-bottom: 34px;
}
.gp-sect-alt .gp-session { background: var(--gp-paper); }
.gp-session h2 { max-width: 34ch; }
.gp-session .gp-prose { max-width: 74ch; }

.gp-webroom {
  font-size: 15px; color: var(--gp-muted); font-style: italic; margin: 1.2em 0 .6em;
}

.gp-sched { width: 100%; border-collapse: collapse; margin: .6em 0 1em; }
.gp-sched th, .gp-sched td {
  text-align: left; vertical-align: top; border-top: 1px solid var(--gp-line);
  padding: 14px 0;
}
.gp-sched th { width: 210px; padding-right: 22px; font-weight: 400; }
.gp-edt, .gp-cest { display: block; font-size: 14px; }
.gp-edt { color: var(--gp-ink); font-weight: 500; }
.gp-cest { color: var(--gp-muted); }

.gp-slot { margin: 0; color: var(--gp-ink); font-weight: 500; }

.gp-talks { list-style: none; margin: .7em 0 0; padding: 0; }
.gp-talks li { border-left: 2px solid var(--gp-line); padding-left: 14px; margin-bottom: .8em; }
.gp-talks li:last-child { margin-bottom: 0; }
.gp-talk { display: block; }
.gp-person { display: block; font-weight: 500; color: var(--gp-ink); margin-top: 2px; }
.gp-org { display: block; font-size: 15px; color: var(--gp-muted); }

/* --- geostar ------------------------------------------------------------------------------ */

.gp-cats {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.gp-cats li { border: 1px solid var(--gp-line); border-top: 3px solid var(--gp-rust); padding: 20px; }
.gp-cat-no {
  font-size: 13px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--gp-rust); margin: 0 0 .4em;
}
.gp-cat-name {
  font-family: "Source Serif 4", Georgia, serif; font-size: 19px; color: var(--gp-ink);
  margin: 0 0 .5em;
}
.gp-cat-q { margin: 0; font-size: 16px; }

.gp-timeline { list-style: none; margin: 0; padding: 0 0 0 26px; border-left: 2px solid var(--gp-line); }
.gp-timeline li { position: relative; padding: 0 0 22px; max-width: 70ch; }
.gp-timeline li::before {
  content: ""; position: absolute; left: -33px; top: 7px;
  width: 12px; height: 12px; background: var(--gp-rust); border-radius: 50%;
}
.gp-tl-name { margin: 0 0 .3em; font-weight: 500; color: var(--gp-ink); }

/* --- material / registration -------------------------------------------------------------- */

.gp-files, .gp-reg { list-style: none; margin: 0 0 1.4em; padding: 0; }
.gp-files li { border-top: 1px solid var(--gp-line); padding: 16px 0; max-width: 74ch; }
.gp-files li:last-child { border-bottom: 1px solid var(--gp-line); }
.gp-file-name { margin: 0 0 .3em; font-weight: 500; color: var(--gp-ink); font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 15px; }
.gp-file-desc { margin: 0; }

.gp-reg li { border-top: 1px solid var(--gp-line); padding: 14px 0; color: var(--gp-ink); }
.gp-reg li:last-child { border-bottom: 1px solid var(--gp-line); }

.gp-closed {
  background: var(--gp-rust-soft); border-left: 3px solid var(--gp-rust);
  padding: 14px 18px; margin-top: 1.4em;
}

/* --- footer ------------------------------------------------------------------------------- */

.gp-foot { background: var(--gp-slate); color: var(--gp-on-slate-dim); padding: 40px 0 46px; font-size: 15px; }
.gp-foot a { color: #e8a377; }
.gp-foot a:hover { color: #fff; }
.gp-foot-nav { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-bottom: 22px; }
.gp-foot-nav a { text-decoration: none; }
.gp-foot-org, .gp-foot-contact { max-width: 70ch; }
.gp-fine { font-size: 14px; color: #97a1a9; max-width: 78ch; margin-bottom: 0; }

/* --- 404 ---------------------------------------------------------------------------------- */

.gp-404 { padding: 70px 0; }
.gp-404 .gp-wrap { max-width: 60ch; }
/* .gp-kicker is coloured for the dark hero; on the light 404 page it measured 2.37:1. */
.gp-404 .gp-kicker { color: var(--gp-rust); }

@media (max-width: 720px) {
  .gp-sched th, .gp-sched td { display: block; width: auto; padding: 0; }
  .gp-sched th { border-top: 1px solid var(--gp-line); padding-top: 14px; }
  .gp-sched td { padding: 8px 0 14px; }
  .gp-edt, .gp-cest { display: inline; }
  .gp-cest::before { content: " / "; }
  .gp-session { padding: 22px 18px 26px; }
}