:root {
  --bg: #0b0d12;
  --bg-2: #11141c;
  --panel: #161a24;
  --text: #e8ecf3;
  --muted: #a9b1c0;
  --accent: #00b7d4;
  --accent-hover: #4ce0f5;
  --link: #6fd6ea;
  --border: #232838;
  --max: 1100px;
  --space: 1rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); text-decoration: none; }
a:hover, a:focus { color: var(--accent-hover); text-decoration: underline; }

h1, h2, h3, h4 {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-weight: 600;
  letter-spacing: 0.01em;
  margin: 0 0 0.6em;
  line-height: 1.2;
  color: #fff;
}
h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-top: 2.2em; }
h3 { font-size: 1.2rem; margin-top: 1.5em; color: var(--accent-hover); }
p { margin: 0 0 1em; }

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

/* layout */
.container { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }
.narrow { max-width: 760px; }

main { padding: 2.5rem 0 3rem; }
section { margin-bottom: 2.5rem; }

/* header / nav */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11,13,18,0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
}
.nav-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.7rem 1.25rem;
  max-width: var(--max);
  margin: 0 auto;
  gap: 1rem;
}
.brand { display: flex; align-items: center; gap: 0.7rem; color: #fff; font-weight: 600; }
.brand img { height: 32px; width: auto; display: block; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.nav-toggle {
  display: none; background: transparent; border: 1px solid var(--border);
  color: var(--text); padding: 0.4rem 0.7rem; border-radius: 4px;
  font-size: 1rem; cursor: pointer;
}
.nav ul {
  display: flex; gap: 1.2rem; list-style: none; margin: 0; padding: 0;
}
.nav a {
  color: var(--text); text-decoration: none; padding: 0.4rem 0.2rem;
  border-bottom: 2px solid transparent;
}
.nav a:hover, .nav a.active { color: #fff; border-bottom-color: var(--accent); }

/* hero */
.hero {
  position: relative;
  min-height: 60vh;
  display: flex; align-items: center; justify-content: center;
  background: #000 center/cover no-repeat;
  text-align: center;
  padding: 4rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.45) 0%, rgba(11,13,18,0.85) 100%);
}
.hero-content { position: relative; max-width: 800px; }
.hero h1 { color: #fff; margin-bottom: 0.4em; }
.hero p.lead { font-size: 1.25rem; color: #d6dde9; margin-bottom: 1.5em; }

/* button */
.btn {
  display: inline-block;
  background: var(--accent);
  color: #001218;
  padding: 0.7rem 1.4rem;
  border-radius: 4px;
  font-weight: 600;
  border: 1px solid var(--accent);
  text-decoration: none;
}
.btn:hover, .btn:focus {
  background: var(--accent-hover); color: #001218; border-color: var(--accent-hover);
  text-decoration: none;
}
.btn.ghost { background: transparent; color: var(--accent-hover); border-color: var(--accent-hover); }
.btn.ghost:hover { background: rgba(0,183,212,0.12); }

/* panels / cards */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.5rem;
}
.grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.25rem;
}
.card h3 { margin-top: 0; }
.card img { border-radius: 4px; margin-bottom: 0.8rem; }

/* team */
.team-grid {
  display: grid; gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.team-member img {
  width: 180px; height: 180px; border-radius: 4px; object-fit: cover;
  margin-bottom: 0.8rem; border: 1px solid var(--border);
  display: block;
}
.team-member .role { color: var(--muted); font-size: 0.95rem; margin-bottom: 0.6em; }

/* project section graphics on the about page */
.project-graphic {
  max-width: 280px;
  margin: 0.5rem 0 1rem;
  border-radius: 4px;
}
.section-graphic {
  max-width: 100%;
  margin: 1rem 0 1.5rem;
  border-radius: 4px;
}

/* partner block */
.partner {
  display: grid; grid-template-columns: 200px 1fr; gap: 1.5rem;
  align-items: start;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.partner:last-child { border-bottom: none; }
.partner img { background: #fff; padding: 0.6rem; border-radius: 4px; }
.partner h3 { margin-top: 0; }
@media (max-width: 640px) {
  .partner { grid-template-columns: 1fr; }
  .partner img { max-width: 200px; }
}

/* report list */
.report-list { list-style: none; padding: 0; }
.report-list li {
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-2);
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 1rem;
  align-items: center;
}
.report-list li img {
  width: 90px; height: auto; border-radius: 3px;
  border: 1px solid var(--border);
}
.report-list li > a { display: block; }
.report-list a { font-weight: 600; }
.report-list .meta { color: var(--muted); font-size: 0.9rem; margin-top: 0.2rem; }

/* footer */
.site-footer {
  border-top: 1px solid var(--border);
  background: #07090e;
  padding: 1.8rem 1.25rem;
  color: var(--muted);
  font-size: 0.95rem;
}
.footer-row {
  max-width: var(--max); margin: 0 auto;
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem;
}
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--accent-hover); }
.footer-nav ul { list-style: none; padding: 0; margin: 0; display: flex; gap: 1rem; flex-wrap: wrap; }

/* light theme - applied per-page via body.theme-light */
body.theme-light {
  --bg: #ffffff;
  --bg-2: #f5f7fb;
  --panel: #ffffff;
  --text: #111418;
  --muted: #4a5363;
  --link: #0a5fb8;
  --border: #d8dde6;
  background: #ffffff;
  color: var(--text);
}
body.theme-light h1 {
  color: #111418;
  font-weight: 700;
}
body.theme-light h2,
body.theme-light h3,
body.theme-light h4 {
  color: #0a5fb8;
  font-weight: 700;
}
body.theme-light a { color: #0a5fb8; }
body.theme-light a:hover, body.theme-light a:focus { color: #073f7d; }

body.theme-light .site-header {
  background: rgba(255,255,255,0.96);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}
body.theme-light .nav a { color: #111418; }
body.theme-light .nav a:hover,
body.theme-light .nav a.active { color: #0a5fb8; border-bottom-color: #0a5fb8; }
body.theme-light .nav-toggle { color: #111418; border-color: var(--border); }

body.theme-light .partner img {
  background: transparent; padding: 0;
}
body.theme-light .site-footer {
  background: #f1f4f9;
  color: #4a5363;
  border-top: 1px solid var(--border);
}
body.theme-light .site-footer a { color: #4a5363; }
body.theme-light .site-footer a:hover { color: #0a5fb8; }

/* responsive nav */
@media (max-width: 720px) {
  .nav-toggle { display: inline-block; }
  .nav { display: none; width: 100%; }
  .nav.open { display: block; }
  .nav-row { flex-wrap: wrap; }
  .nav ul { flex-direction: column; gap: 0.4rem; padding: 0.6rem 0 0.2rem; width: 100%; }
  .nav a { display: block; padding: 0.5rem 0.2rem; }
}