/*
 * DAPLab site: the shared frame, type scale and components.
 *
 * One frame (1040px) that the header, every page and the footer share, so
 * everything lines up with the logo; a centered reading column for prose; one
 * accent color (Columbia navy). Pages use these classes instead of their own
 * widths and inline styles.
 */

:root {
  --dap-frame: 1040px;
  --dap-gutter: 1.5rem;
  --dap-prose: 46rem;

  --dap-ink: #19212d;
  --dap-muted: #5a6575;
  --dap-faint: #8994a3;
  --dap-rule: #e3e7ed;
  --dap-surface: #f6f8fb;
  --dap-navy: #012169; /* Columbia navy: the accent */
  --dap-link: #1d4f91; /* Columbia dark blue */
  --dap-radius: 8px;

  --bs-body-color: var(--dap-ink);
  --bs-body-font-size: 1rem;
  --bs-body-line-height: 1.6;
  --bs-link-color-rgb: 29, 79, 145;
  --bs-link-hover-color-rgb: 1, 33, 105;
  --bs-border-color: var(--dap-rule);
}

body {
  color: var(--dap-ink);
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a { color: var(--dap-link); text-decoration: none; }
a:hover { color: var(--dap-navy); text-decoration: underline; text-underline-offset: 2px; }

h1, h2, h3, h4, h5, h6 {
  color: var(--dap-ink);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

/* ------------------------------------------------------------------ frame */

.site-frame {
  width: 100%;
  max-width: calc(var(--dap-frame) + 2 * var(--dap-gutter));
  margin-inline: auto;
  padding-inline: var(--dap-gutter);
}

.site-main {
  flex: 1 0 auto;
  padding-block: 2.5rem 4.5rem;
}

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

.site-header {
  background: #fff;
  border-bottom: 1px solid var(--dap-rule);
}
.site-header .navbar { padding-block: 0.85rem; }
.site-header .navbar-brand { padding: 0; margin-right: 1.5rem; }
.site-header .navbar-brand img { height: 1.7rem; width: auto; display: block; }
.site-header .navbar-nav { gap: 0.15rem; }
.site-header .nav-link {
  color: var(--dap-ink);
  font-weight: 500;
  padding: 0.4rem 0.75rem !important;
  border-radius: 6px;
}
.site-header .nav-link:hover { color: var(--dap-navy); background: var(--dap-surface); text-decoration: none; }
.site-header .nav-link.active { color: var(--dap-navy); background: var(--dap-surface); }

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

.site-footer {
  border-top: 1px solid var(--dap-rule);
  padding-block: 2rem 2.5rem;
  font-size: 0.875rem;
  color: var(--dap-muted);
}
.site-footer .site-frame {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem 2rem;
}
.site-footer-info p { margin: 0; }
.site-footer-admin { white-space: nowrap; }
.site-footer strong { color: var(--dap-ink); font-weight: 600; }
.site-footer a { color: var(--dap-muted); }
.site-footer a:hover { color: var(--dap-navy); }

/* ---------------------------------------------------------- page structure */

.page-header {
  margin-bottom: 2.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--dap-rule);
}
.page-title { font-size: 2rem; font-weight: 700; line-height: 1.25; letter-spacing: -0.01em; color: var(--dap-ink); margin: 0; }
.page-lede {
  font-size: 1.1rem;
  color: var(--dap-muted);
  margin: 0.6rem 0 0;
  max-width: var(--dap-prose);
}

.section + .section { margin-top: 3.25rem; }
.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.1rem;
}
.section-title { font-size: 1.35rem; margin: 0; }
.section-link { font-size: 0.9rem; font-weight: 500; white-space: nowrap; }

.eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dap-muted);
  margin: 0 0 0.5rem;
}
.muted { color: var(--dap-muted); }

/* A centered reading column for paragraphs of text. */
.prose { max-width: var(--dap-prose); margin-inline: auto; }
/* Prose typography across the whole frame, for text pages that sit beside list pages. */
.prose.prose-full { max-width: none; }
.prose > :first-child { margin-top: 0; }
.prose p, .prose li { line-height: 1.7; }
.prose h2 { font-size: 1.45rem; margin: 2.5rem 0 0.75rem; }
.prose h3 { font-size: 1.15rem; margin: 1.9rem 0 0.5rem; }
.prose h4 { font-size: 1rem; margin: 1.5rem 0 0.4rem; }
.prose img { max-width: 100%; height: auto; }
.prose blockquote {
  border-left: 3px solid var(--dap-rule);
  padding-left: 1rem;
  color: var(--dap-muted);
}

/* A quiet box for content set apart from the page. */
.panel {
  background: var(--dap-surface);
  border: 1px solid var(--dap-rule);
  border-radius: var(--dap-radius);
  padding: 1.5rem 1.75rem;
}

/* ------------------------------------------------------------------- chips */

/* Filters (and anything toggle-like): one shape across the site. */
.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0 0 2rem; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.85rem;
  border: 1px solid var(--dap-rule);
  border-radius: 999px;
  background: #fff;
  color: var(--dap-ink);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.3;
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}
.chip:hover { background: var(--dap-surface); border-color: #c8d0db; color: var(--dap-ink); text-decoration: none; }
.chip.active,
.chip[aria-pressed="true"] { background: var(--dap-navy); border-color: var(--dap-navy); color: #fff; }

/* A primary action in the site's accent. */
.btn-dap {
  --bs-btn-color: #fff;
  --bs-btn-bg: var(--dap-navy);
  --bs-btn-border-color: var(--dap-navy);
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: #001a52;
  --bs-btn-hover-border-color: #001a52;
  --bs-btn-font-weight: 600;
  --bs-btn-border-radius: 6px;
}
.btn-dap-outline {
  --bs-btn-color: var(--dap-navy);
  --bs-btn-bg: #fff;
  --bs-btn-border-color: #c8d0db;
  --bs-btn-hover-color: var(--dap-navy);
  --bs-btn-hover-bg: var(--dap-surface);
  --bs-btn-hover-border-color: var(--dap-navy);
  --bs-btn-font-weight: 600;
  --bs-btn-border-radius: 6px;
}

@media (max-width: 575.98px) {
  :root { --dap-gutter: 1.1rem; }
  .site-main { padding-block: 1.75rem 3.5rem; }
  .page-title { font-size: 1.65rem; }
}