/* ═══════════════════════════════════════════════════════════
   SOAR Initiative — stylesheet

   PALETTE lives in :root below. Recolouring the entire site is
   an edit to those lines and nothing else.

   Contrast is assigned by ROLE, not by taste: navy carries all
   text on light backgrounds, light blue carries accents, fills
   and borders. Light blue on white measures ~2.9:1, under the
   4.5:1 needed for body text, so it never sets reading copy.
   --accent (#2c6fa8) is the darkened blue used for links, at
   ~5.3:1 on paper.

   Type is a system font stack — deliberately no Google Fonts,
   which would issue a request to Google on every page load.
   ═══════════════════════════════════════════════════════════ */

:root {
  /* Ink — text on light backgrounds */
  --ink: #0d1b2a; /* headings          ~17:1 on paper */
  --ink-body: #1b3a53; /* body              ~11:1 on paper */
  --ink-muted: #4a6377; /* secondary text    ~6.3:1 on paper */

  /* Navy — used as a background for dark blocks */
  --navy: #0f2438;
  --navy-deep: #0a1826;

  /* Accent — light blue family */
  --accent: #2c6fa8; /* links             ~5.3:1 on paper */
  --accent-strong: #1d5687; /* link hover */
  --accent-soft: #5b9bd5; /* borders, marks */
  --accent-pale: #b8d8ef; /* text on navy, rules */
  --accent-wash: #eef4fa; /* section fills */
  --accent-wash-deep: #dfebf7; /* gradient end */

  --paper: #ffffff;
  --rule: #d8e4ee;

  --wrap: 62rem;
  --step: 1.5rem;
}

/* ── Reset ───────────────────────────────────────────────── */

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink-body);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ── Layout ──────────────────────────────────────────────── */

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--step);
}

/* Direct children of <main> are constrained by default… */
main > * {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--step);
}

/* …and .bleed opts out, running edge to edge with its own .wrap inside. */
main > .bleed {
  max-width: none;
  padding-inline: 0;
}

main {
  padding-bottom: 5rem;
}

main > * + * {
  margin-top: 4.5rem;
}

main > .bleed:first-child {
  margin-top: 0;
}

/* ── Typography ──────────────────────────────────────────── */

h1,
h2,
h3 {
  color: var(--ink);
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin: 0 0 0.75rem;
  font-weight: 650;
}

h1 {
  font-size: clamp(2rem, 5vw, 2.85rem);
}
h2 {
  font-size: clamp(1.4rem, 3vw, 1.8rem);
}
h3 {
  font-size: 1.125rem;
}

p {
  margin: 0 0 1.1rem;
  max-width: 68ch;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-strong);
  text-decoration-thickness: 2px;
}

.lede {
  font-size: 1.2rem;
  color: var(--ink-body);
}

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

/* Accent label above a heading */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.7rem;
}

/* Short accent rule trailing the eyebrow label */
.eyebrow::after {
  content: "";
  flex: 1;
  height: 2px;
  background: linear-gradient(
    to right,
    var(--accent-soft),
    transparent
  );
  max-width: 8rem;
}

/* ── Accessibility ───────────────────────────────────────── */

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
}

.skip-link:focus {
  left: var(--step);
  top: 0.5rem;
  z-index: 10;
  background: var(--paper);
  padding: 0.6rem 1rem;
  border: 2px solid var(--accent);
}

/* ── Header ──────────────────────────────────────────────── */

.site-header {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}

.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.4rem;
}

.wordmark {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}

/* Accent block before the wordmark — a mark that needs no logo file
   and survives a rename. */
.wordmark::before {
  content: "";
  display: inline-block;
  width: 0.55rem;
  height: 1.1rem;
  margin-right: 0.55rem;
  vertical-align: -0.12rem;
  border-radius: 1px;
  background: linear-gradient(
    to bottom,
    var(--accent-soft),
    var(--accent)
  );
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.95rem;
}

.nav a {
  color: var(--ink-body);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 2px solid transparent;
}

.nav a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent-soft);
}

.nav a[aria-current="page"] {
  color: var(--ink);
  font-weight: 650;
  border-bottom-color: var(--accent);
}

/* ── Hero band ───────────────────────────────────────────── */

.hero-band {
  background:
    radial-gradient(
      60rem 26rem at 15% -10%,
      var(--accent-wash) 0%,
      transparent 70%
    ),
    linear-gradient(160deg, var(--accent-wash) 0%, var(--accent-wash-deep) 100%);
  border-bottom: 1px solid var(--rule);
  padding-block: 4.5rem 4rem;
}

.hero h1 {
  max-width: 20ch;
}

.hero .lede {
  max-width: 56ch;
  margin-bottom: 0;
}

/* ── Grids ───────────────────────────────────────────────── */

.grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  margin-top: 2rem;
}

.card {
  background: var(--accent-wash);
  border-radius: 6px;
  border-top: 3px solid var(--accent-soft);
  padding: 1.5rem;
  transition:
    transform 0.15s ease,
    box-shadow 0.15s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(15, 36, 56, 0.09);
}

.card h3 {
  margin-bottom: 0.4rem;
}

.card p {
  margin-bottom: 0;
  font-size: 0.97rem;
}

/* Numbered variant for the research directions */
.grid--numbered {
  counter-reset: card;
}

.grid--numbered .card {
  counter-increment: card;
}

.grid--numbered .card h3::before {
  content: counter(card, decimal-leading-zero);
  display: block;
  font-size: 1.6rem;
  font-weight: 750;
  line-height: 1;
  color: var(--accent-soft);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

/* Team member: circular portrait */
.person__photo {
  width: 6.5rem;
  height: 6.5rem;
  border-radius: 50%;
  object-fit: cover;
  background: linear-gradient(
    150deg,
    var(--accent-pale),
    var(--accent-soft)
  );
  margin-bottom: 0.9rem;
}

.person__role {
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

/* ── Panels ──────────────────────────────────────────────── */

.panel {
  background: var(--accent-wash);
  border-left: 4px solid var(--accent-soft);
  border-radius: 4px;
  padding: 2rem;
}

.panel > :last-child {
  margin-bottom: 0;
}

/* Dark variant — a strong colour block to anchor the page */
.panel--dark {
  background: linear-gradient(140deg, var(--navy) 0%, var(--navy-deep) 100%);
  border-left: 4px solid var(--accent-soft);
  color: var(--accent-pale);
}

.panel--dark h2 {
  color: var(--paper);
}

.panel--dark a {
  color: var(--accent-pale);
  text-decoration-thickness: 1px;
}

.panel--dark a:hover {
  color: var(--paper);
}

/* ── Post list ───────────────────────────────────────────── */

.posts {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
}

.posts li {
  padding: 1.3rem 1rem 1.3rem 0;
  border-top: 1px solid var(--rule);
  transition: padding-left 0.15s ease;
}

.posts li:last-child {
  border-bottom: 1px solid var(--rule);
}

.posts li:hover {
  padding-left: 0.6rem;
  border-left: 3px solid var(--accent-soft);
}

.posts h3 {
  margin-bottom: 0.25rem;
}

.posts a {
  text-decoration: none;
}

.posts a:hover {
  text-decoration: underline;
}

.post__date {
  color: var(--ink-muted);
  font-size: 0.87rem;
}

/* ── Article ─────────────────────────────────────────────── */

.article {
  max-width: 42rem;
}

.article h2 {
  margin-top: 2.5rem;
}

.article blockquote {
  margin: 1.5rem 0;
  padding: 0.5rem 0 0.5rem 1.2rem;
  border-left: 3px solid var(--accent-soft);
  color: var(--ink-muted);
}

/* ── Footer ──────────────────────────────────────────────── */

.site-footer {
  background: linear-gradient(140deg, var(--navy) 0%, var(--navy-deep) 100%);
  color: var(--accent-pale);
  margin-top: 5rem;
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  padding-block: 2.5rem;
}

.site-footer__name {
  margin: 0;
  color: var(--paper);
  font-weight: 650;
  font-size: 1rem;
}

.nav--footer {
  font-size: 0.9rem;
}

.nav--footer a {
  color: var(--accent-pale);
}

.nav--footer a:hover {
  color: var(--paper);
  border-bottom-color: var(--accent-pale);
}