/* ProgressCompass project page. Layout follows the ProgressLM / Cambrian project pages. */
:root {
  --ink: #1f2d3d;
  --sec: #5f6670;
  --purple: #4e2a84;
  --purple-2: #7a5ab0;
  --lav: #f3eef9;
  --line: #e6e1ee;
  --state: #6633a6;
  --seq: #236ca6;
  --rec: #be5718;
  --good: #1e7a45;
  --bad: #a0283a;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: #ffffff;
  color: var(--ink);
  font-family: Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
  font-size: 18px;
  line-height: 1.65;
}

a { color: #2c5fb8; text-decoration: none; }
a:hover { text-decoration: underline; }

/* ------------------------------------------------------------------ header */
.header-wrapper {
  position: relative;
  overflow: hidden;
  background: #120828;
  padding: 60px 0 54px;
}
/* the picture sits on the right; a gradient keeps the text side dark and clean */
.header-wrapper::before {
  content: "";
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 60%;
  background: url("../img/header_bg.jpg") right center / auto 100% no-repeat;
}
.header-wrapper::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, #120828 0%, #120828 44%, rgba(18, 8, 40, 0.6) 54%, rgba(18, 8, 40, 0) 64%);
}
.header-container { position: relative; z-index: 1; }

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  align-items: center;
  gap: 48px;
  color: #f4efff;
}

.header-content { flex: 0 1 820px; }
.title-logo { height: 1.15em; vertical-align: -0.2em; margin-right: 0.28em;
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.45)); }

.header-content h1 {
  margin: 0;
  font-size: 58px;
  line-height: 1.1;
  color: #e7d9ff;
  font-family: "Menlo", "Consolas", "DejaVu Sans Mono", monospace;
  letter-spacing: -1px;
}

.header-content h2 {
  margin: 10px 0 22px;
  font-size: 34px;
  line-height: 1.25;
  font-weight: 600;
  color: #ffffff;
}

.header-content p { font-size: 18px; color: #ece4fb; margin: 0 0 18px; }
.header-content strong { color: #ffe39a; }

.icon-container { display: flex; flex-direction: column; gap: 12px; margin: 8px 0 24px; }

.icon-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 16.5px;
  line-height: 1.5;
}

.icon-item .badge {
  flex: 0 0 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  font-family: -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
}

.button-container { display: flex; flex-wrap: wrap; gap: 12px; }

.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 20px;
  border-radius: 999px;
  font-size: 16px;
  font-family: -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  background: #24292f;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.35);
  transition: background-color 0.2s, transform 0.2s;
}
.button:hover { background: #4e2a84; color: #fff; text-decoration: none; transform: translateY(-1px); }
.button.disabled { opacity: 0.6; cursor: default; }
.button.disabled:hover { background: #24292f; transform: none; }

.header-image { flex: 1 1 36%; text-align: center; }
.header-image img { max-width: 78%; filter: drop-shadow(0 18px 30px rgba(0, 0, 0, 0.35)); }

/* ------------------------------------------------------------------ byline */
.byline {
  border-bottom: 1px solid var(--line);
  padding: 26px 20px 22px;
  text-align: center;
}
.author-list { margin: 0 0 8px; font-size: 19px; }
.author-list span { display: inline-block; margin: 2px 10px; }
.author-link { color: var(--ink); }
.author-link:hover { color: var(--purple); }
.affiliations { color: var(--sec); font-size: 16.5px; }
.affiliations span { display: inline-block; margin: 2px 10px; }

/* ----------------------------------------------------------------- article */
article { max-width: 980px; margin: 0 auto; padding: 10px 24px 60px; }

article h1 {
  font-size: 30px;
  margin: 56px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--lav);
  color: var(--purple);
}
article h2 { font-size: 23px; margin: 32px 0 10px; }
article p { margin: 0 0 16px; text-align: justify; }

.abstract {
  background: var(--lav);
  border-left: 4px solid var(--purple-2);
  border-radius: 8px;
  padding: 18px 24px;
}

figure { margin: 28px 0 30px; }
figure img { display: block; margin: 0 auto; max-width: 100%; border-radius: 6px; }
figure img.zoomable { cursor: zoom-in; }
figcaption { margin-top: 10px; font-size: 16px; color: var(--sec); line-height: 1.55; }
figcaption strong { color: var(--ink); }

.two-col { display: flex; gap: 28px; align-items: center; }
.two-col > * { flex: 1 1 0; }

.forms { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 18px 0 8px; }
.form-card {
  border: 2px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 16.5px;
  line-height: 1.5;
}
.form-card h3 { margin: 0 0 6px; font-size: 18.5px; }

.components { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.component {
  border-radius: 12px;
  padding: 12px 16px;
  background: #faf8fd;
  border: 1px solid var(--line);
  font-size: 16.5px;
  line-height: 1.5;
}
.component b { display: block; font-size: 18px; }
.component .model { color: var(--sec); font-size: 14.5px; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 20px 0; }
.stat { text-align: center; background: #faf8fd; border: 1px solid var(--line); border-radius: 12px; padding: 14px 8px; }
.stat .num { font-size: 32px; font-weight: 700; color: var(--purple); font-family: -apple-system, "Segoe UI", Helvetica, Arial, sans-serif; }
.stat .lbl { font-size: 14.5px; color: var(--sec); }

/* tables */
.table-wrap { overflow-x: auto; }
table.results {
  border-collapse: collapse;
  margin: 10px auto 4px;
  font-size: 15.5px;
  font-family: -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  min-width: 640px;
}
table.results th, table.results td { padding: 7px 12px; text-align: center; border-bottom: 1px solid var(--line); }
table.results thead th { border-bottom: 2px solid #c9c0d8; background: #faf8fd; }
table.results td:first-child, table.results th:first-child { text-align: left; font-weight: 600; }
table.results .grp { background: #f6f2fb; }
.delta-better { color: var(--good); font-size: 13.5px; margin-left: 3px; }
.delta-worse { color: var(--bad); font-size: 13.5px; margin-left: 3px; }

/* jump navigation */
.jump { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin: 30px 0 6px; }
.jump a {
  border: 1px solid #cfc4e0;
  background: #faf8fd;
  color: var(--purple);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 15.5px;
  font-family: -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
}
.jump a:hover { background: var(--lav); text-decoration: none; }

.callout {
  text-align: center;
  font-size: 24px;
  font-weight: 700;
  color: var(--purple);
  margin: 26px 0;
}

pre.bibtex {
  background: #f6f5f9;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px 18px;
  font-size: 14px;
  line-height: 1.5;
  overflow-x: auto;
  white-space: pre;
}

footer { text-align: center; color: var(--sec); font-size: 14.5px; padding: 26px 20px 40px; border-top: 1px solid var(--line); }

/* lightbox for zoomable figures */
#lightbox {
  position: fixed; inset: 0; background: rgba(20, 12, 36, 0.86);
  display: none; align-items: center; justify-content: center; z-index: 10; cursor: zoom-out;
}
#lightbox img { max-width: 94vw; max-height: 92vh; background: #fff; border-radius: 6px; }

@media (max-width: 900px) {
  .header-container { flex-direction: column-reverse; padding: 0 20px; gap: 18px; }
  .header-content h1 { font-size: 42px; }
  .header-content h2 { font-size: 26px; }
  .forms, .components, .stats { grid-template-columns: 1fr; }
  .two-col { flex-direction: column; }
  article p { text-align: left; }
}

.two-col p { text-align: left; }

@media (max-width: 900px) {
  .header-wrapper::before { width: 100%; opacity: 0.35; background-position: 75% center; }
  .header-wrapper::after { background: rgba(18, 8, 40, 0.55); }
  .header-content { flex: 1 1 auto; }
}

/* ---------------------------------------------------------------- polish */
.icon-item .badge { font-size: 17px; }
.icon-item .badge i { line-height: 1; }

.highlights { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 26px 0 8px; }
.hl {
  background: linear-gradient(180deg, #faf7fe 0%, #f3eef9 100%);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 14px 14px;
  text-align: center;
}
.hl-num { font: 700 30px/1.1 -apple-system, "Segoe UI", Helvetica, Arial, sans-serif; color: var(--purple); }
.hl-txt { margin-top: 6px; font-size: 14.5px; line-height: 1.4; color: var(--sec); }
.hl-txt b { color: var(--ink); }

/* section navigation stays at the top while reading */
nav.jump {
  position: sticky; top: 0; z-index: 5;
  margin: 26px -24px 0; padding: 10px 24px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
article h1[id], article h2[id] { scroll-margin-top: 70px; }

/* figures sit on a light card */
figure img { background: #fff; }
article > figure > img, .two-col figure img {
  border: 1px solid var(--line); border-radius: 10px; padding: 10px;
  box-shadow: 0 2px 10px rgba(40, 20, 80, 0.05);
}
.two-col { align-items: flex-start; }
.two-col > * { min-width: 0; }
.two-col.side-narrow > div { flex: 1.7 1 0; }
.two-col.side-narrow > .side-fig { flex: 1 1 0; margin: 0; }
.side-fig figcaption { font-size: 14.5px; }
.callout { text-align: left; margin: 10px 0 0; }

@media (max-width: 900px) {
  .highlights { grid-template-columns: repeat(2, 1fr); }
  nav.jump { margin: 20px -24px 0; }
}

/* title typeface and a one-line section nav */
.header-content h1 {
  font-family: "Sora", -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  font-weight: 800;
  letter-spacing: -1.5px;
  color: #efe6ff;
}
.header-content h2 { font-family: "Sora", -apple-system, "Segoe UI", Helvetica, Arial, sans-serif; font-weight: 700; letter-spacing: -0.3px; }
nav.jump {
  flex-wrap: nowrap;
  justify-content: space-between;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}
nav.jump::-webkit-scrollbar { display: none; }
nav.jump a { flex: 1 0 auto; text-align: center; white-space: nowrap; padding: 6px 14px; }
@media (max-width: 900px) { nav.jump { justify-content: flex-start; } nav.jump a { flex: 0 0 auto; } }

/* ------------------------------------------ alignment: one grid for every two-column block */
.two-col {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  column-gap: 40px;
  align-items: start;
  margin: 8px 0 28px;
}
.two-col.cols-diag { grid-template-columns: minmax(0, 1.9fr) minmax(0, 1fr); }
.two-col.cols-method { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: stretch; }
.two-col > div > p:first-child { margin-top: 0; }
.two-col > div > p:last-child { margin-bottom: 0; }
.side-fig { margin: 0; }
.two-col figure img { width: 100%; max-width: none; display: block; box-sizing: border-box; }
.side-fig figcaption { margin-top: 8px; }
/* the four component cards fill the height of the loop figure */
.cols-method .components { grid-template-rows: 1fr 1fr; height: 100%; align-content: stretch; }
/* the table spans the text width */
table.results { width: 100%; min-width: 640px; margin: 10px 0 4px; }
article h1 { font-size: 28px; }
@media (max-width: 900px) {
  .two-col, .two-col.cols-diag, .two-col.cols-method { grid-template-columns: 1fr; row-gap: 18px; }
  .cols-method .components { height: auto; }
}
.cols-method .components { grid-template-columns: 1fr; grid-template-rows: repeat(4, 1fr); gap: 12px; }
.cols-method .component { display: flex; flex-direction: column; justify-content: center; }
.cols-method .component b { display: inline; margin-right: 8px; }
.cols-method .component br { display: none; }
.cols-method .component .model::after { content: ""; display: block; }