/* SPARC — single-page site
   Palette riffs on NHS blues with the SPARC logo pink. */

:root {
  --nhs-blue: #005EB8;
  --nhs-dark: #003087;
  --ink: #1D2B3A;
  --ink-soft: #4A5868;
  --pale: #EAF2FB;
  --line: #C9D9EC;
  --white: #FFFFFF;
  --pink: #E33E5F;        /* logo pink, for marks and large shapes */
  --pink-deep: #C8143F;   /* text-safe pink on white (AA) */

  --font-display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --font-body: "Atkinson Hyperlegible", "Segoe UI", system-ui, sans-serif;
  --font-logo: "Poppins", "Segoe UI", system-ui, sans-serif;

  --wrap: 72rem;
  --gutter: clamp(1rem, 4vw, 2rem);
  --radius-lg: 1.25rem;
  --radius-sm: 0.5rem;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 5rem; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--nhs-blue); }
a:hover { color: var(--nhs-dark); }

:focus-visible {
  outline: 3px solid #FFB81C; /* NHS warm yellow focus */
  outline-offset: 3px;
  border-radius: 4px;
}

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.skip {
  position: absolute;
  left: -999px;
  top: 0.5rem;
  background: var(--white);
  color: var(--ink);
  padding: 0.5rem 1rem;
  z-index: 100;
}
.skip:focus { left: 0.5rem; }

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: #333333;
}
.brand-word {
  font-family: var(--font-logo);
  font-weight: 600;
  font-size: 1.6rem;
  letter-spacing: -0.01em;
  line-height: 1;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav a {
  display: block;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
}
.nav a:hover { background: var(--pale); color: var(--nhs-dark); }
.nav .nav-cta { background: var(--nhs-blue); color: var(--white); }
.nav .nav-cta:hover { background: var(--nhs-dark); color: var(--white); }

@media (max-width: 760px) {
  .header-inner { flex-direction: column; align-items: stretch; padding-top: 0.6rem; padding-bottom: 0.5rem; gap: 0.4rem; }
  .brand { align-self: flex-start; }
  .nav { flex-wrap: wrap; gap: 0.15rem; margin-left: -0.5rem; }
  .nav a { white-space: nowrap; padding: 0.35rem 0.5rem; font-size: 0.88rem; }
  html { scroll-padding-top: 7rem; }
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  background: var(--nhs-blue);
  color: var(--white);
  padding: clamp(3.5rem, 9vw, 7rem) 0 clamp(3.5rem, 8vw, 6rem);
}

.hero-ring {
  position: absolute;
  width: clamp(16rem, 32vw, 28rem);
  right: max(var(--gutter), calc((100vw - var(--wrap)) / 2 + var(--gutter)));
  top: 50%;
  transform: translateY(-50%);
  color: var(--pink);
  opacity: 0.95;
  pointer-events: none;
}

.hero-inner { position: relative; }

.hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 5.2vw, 4.1rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  max-width: 17ch;
  margin: 0 0 1.5rem;
  text-wrap: balance;
}

.lede {
  font-size: clamp(1.1rem, 1.8vw, 1.3rem);
  line-height: 1.55;
  max-width: 34rem;
  margin: 0 0 2rem;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }

@media (max-width: 760px) {
  .hero-ring { width: 7rem; right: var(--gutter); top: 1.75rem; bottom: auto; transform: none; opacity: 1; }
  .hero h1 { max-width: calc(100% - 7.5rem); }
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  border: 2px solid transparent;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}
.btn-pink { background: var(--pink-deep); color: var(--white); }
.btn-pink:hover { background: #A00F33; color: var(--white); }
.btn-ghost { background: transparent; color: var(--white); border-color: rgba(255, 255, 255, 0.85); }
.btn-ghost:hover { background: var(--white); color: var(--nhs-dark); }
.btn-lg { min-height: 3.4rem; padding: 0.8rem 1.8rem; font-size: 1.1rem; }

/* ---------- Sections ---------- */

.section { padding: clamp(3.5rem, 7vw, 5.5rem) 0; }
.section-tint { background: var(--pale); }

h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--nhs-dark);
  margin: 0 0 0.5rem;
}

.section-intro {
  color: var(--ink-soft);
  max-width: 40rem;
  margin: 0 0 2.25rem;
}

h3 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.2;
}

.text-link { font-weight: 700; text-underline-offset: 0.2em; }

/* ---------- Meetings ---------- */

.meetings {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--nhs-dark);
}
.meetings li { border-bottom: 1px solid var(--line); }
.meetings a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.25rem 2rem;
  align-items: baseline;
  padding: 1.25rem 0.75rem;
  margin: 0 -0.75rem;
  color: var(--ink);
  text-decoration: none;
  border-radius: var(--radius-sm);
}
.meetings a:hover { background: var(--pale); }
.m-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--nhs-blue);
  line-height: 1.25;
}
.meetings a:hover .m-name { text-decoration: underline; text-underline-offset: 0.2em; }
.m-desc { color: var(--ink-soft); }
.m-date {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--ink);
  white-space: nowrap;
}

@media (max-width: 760px) {
  .meetings a { grid-template-columns: 1fr; }
  .m-date { white-space: normal; }
}

/* ---------- Research ---------- */

.research-now {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
  margin-bottom: 3.5rem;
}
@media (max-width: 1000px) { .research-now { grid-template-columns: repeat(2, minmax(0, 1fr)); } .project-upcoming { grid-column: 1 / -1; } }
@media (max-width: 680px) { .research-now { grid-template-columns: 1fr; } }

.project {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.75rem 1.6rem;
  border-top: 6px solid var(--nhs-blue);
}
.project-upcoming { border-top-color: var(--pink); }
.project h3 { font-size: 1.75rem; margin: 0.35rem 0 0.6rem; }
.project p { margin: 0 0 1rem; max-width: 36rem; }

.status {
  display: inline-block;
  margin: 0 !important;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
}
.status-upcoming { background: #FDE3EA; color: var(--pink-deep); }
.status-complete { background: var(--pale); color: var(--nhs-dark); }

.sub-h { font-size: 1.4rem; margin: 0 0 1.25rem; }

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 4.75rem;
  top: 0.6rem;
  bottom: 0.6rem;
  width: 2px;
  background: var(--line);
}
.timeline li {
  position: relative;
  display: grid;
  grid-template-columns: 3.75rem minmax(0, 1fr);
  gap: 2rem;
  padding: 0.25rem 0 1.75rem;
}
.timeline li:last-child { padding-bottom: 0; }
.timeline li::after {
  content: "";
  position: absolute;
  left: calc(4.75rem - 5px);
  top: 0.55rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--white);
  border: 3px solid var(--nhs-blue);
}
.t-year {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--nhs-dark);
  line-height: 1.6;
}
.t-body { max-width: 46rem; }
.t-title { margin: 0; font-weight: 700; line-height: 1.4; }
.t-journal { margin: 0.15rem 0 0.35rem; color: var(--ink-soft); }

/* ---------- Get involved ---------- */

.involve {
  background: var(--nhs-dark);
  color: var(--white);
  padding: clamp(3.5rem, 7vw, 5rem) 0;
}
.involve h2 { color: var(--white); }
.involve p { max-width: 36rem; font-size: 1.15rem; margin: 0; }
.involve-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 2rem 3rem;
  align-items: center;
}
.involve-email { color: var(--white); font-weight: 700; text-underline-offset: 0.2em; overflow-wrap: anywhere; }
.involve-email:hover { color: #FFD1DC; }
.involve-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; }
.copy-status { flex-basis: 100%; font-size: 0.95rem !important; min-height: 1.5em; }

@media (max-width: 760px) { .involve-inner { grid-template-columns: 1fr; } }

/* ---------- Committee ---------- */

.committee {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem 1.5rem;
}
@media (max-width: 860px) { .committee { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 480px) { .committee { grid-template-columns: 1fr; } }

.committee li { display: flex; flex-direction: column; gap: 0.15rem; padding-left: 1rem; border-left: 4px solid var(--pink); }
.c-name { font-weight: 700; font-size: 1.1rem; }
.c-role { color: var(--ink-soft); }

/* ---------- Partners ---------- */

.partners {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 13.5rem), 1fr));
  gap: 1rem;
}
.partners a,
.partner-static {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 1.25rem 1.25rem;
  background: var(--white);
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  color: var(--ink);
  text-decoration: none;
}
.partners a:hover { border-color: var(--nhs-blue); box-shadow: 0 0 0 1px var(--nhs-blue); }
.partners img { height: 5.5rem; width: 100%; object-fit: contain; object-position: left center; }
.partners img.logo-wide { height: 5.5rem; }
@media (max-width: 560px) {
  .partners { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.75rem; }
  .partners a { padding: 1rem 0.85rem; }
  .partners img, .partners img.logo-wide { height: 4rem; }
  .p-desc { font-size: 0.85rem; }
}
.p-desc { font-size: 0.95rem; color: var(--ink-soft); line-height: 1.4; }

/* ---------- Footer ---------- */

.site-footer {
  background: var(--ink);
  color: #D5DEE8;
  padding: 2.5rem 0;
  font-size: 0.95rem;
}
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 2rem; }
.footer-inner p { margin: 0; }
.site-footer a { color: var(--white); }
.brand-footer { color: var(--white); }
.brand-footer .brand-word { font-size: 1.3rem; }