/* =========================================
   L6 Swiss Typographic Green — PPBS
   ========================================= */

@import url('https://fonts.googleapis.com/css2?family=Archivo:wght@400;600;700;800;900&display=swap');

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
a { color: inherit; text-decoration: none; }

:root {
  --ink: #0a0a0a;
  --paper: #f2f0ec;
  --accent: #1a5e3a;
  --rule: #c8c4bc;
}

body {
  font-family: 'Archivo', sans-serif;
  background: var(--paper);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

/* --- Topbar --- */
.topbar {
  display: grid;
  grid-template-columns: 200px 1fr;
  border-bottom: 2px solid var(--ink);
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--paper);
}
.topbar .mark {
  padding: 18px 24px;
  font-weight: 900;
  font-size: 15px;
  letter-spacing: .15em;
  text-transform: uppercase;
  border-right: 2px solid var(--ink);
  display: flex;
  align-items: center;
}
.topbar .mark a { color: inherit; text-decoration: none; }
.topbar .mark em { font-style: normal; color: var(--accent); }
.topbar nav {
  display: flex;
  align-items: center;
  gap: 0;
  padding: 0;
}
.topbar nav a {
  padding: 18px 18px;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: .1em;
  font-weight: 600;
  border-right: 1px solid var(--rule);
  transition: background .15s;
  white-space: nowrap;
}
.topbar nav a:hover,
.topbar nav a.active {
  background: var(--ink);
  color: var(--paper);
}
.topbar .nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  padding: 18px 24px;
  font-weight: 700;
}

/* --- Hero (homepage) --- */
.hero {
  display: grid;
  grid-template-columns: 200px 1fr 340px;
  min-height: 520px;
  border-bottom: 2px solid var(--ink);
}
.hero .col-label {
  border-right: 2px solid var(--ink);
  padding: 32px 24px;
  writing-mode: vertical-lr;
  text-orientation: mixed;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .2em;
  font-weight: 700;
  color: var(--accent);
  display: flex;
  align-items: flex-start;
}
.hero .col-main {
  padding: 48px 48px 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-right: 1px solid var(--rule);
}
.hero .col-main h1 {
  font-size: clamp(42px, 5vw, 72px);
  font-weight: 900;
  line-height: .95;
  text-transform: uppercase;
  letter-spacing: -.02em;
  max-width: 650px;
}
.hero .col-main h1 span { color: var(--accent); }
.hero .col-main .sub {
  font-size: 15px;
  line-height: 1.7;
  max-width: 520px;
  margin-top: 32px;
  color: #444;
}
.hero .col-side {
  padding: 0;
  display: grid;
  grid-template-rows: repeat(5, 1fr);
}
.hero .col-side .stat-cell {
  padding: 20px 28px;
  border-bottom: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.hero .col-side .stat-cell:last-child { border-bottom: 0; }
.hero .col-side .stat-cell .num {
  font-size: 38px;
  font-weight: 900;
  letter-spacing: -.03em;
  line-height: 1;
}
.hero .col-side .stat-cell .lbl {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .15em;
  margin-top: 6px;
  color: #777;
  font-weight: 600;
}

/* --- Overview section (homepage) --- */
.overview {
  display: grid;
  grid-template-columns: 200px 1fr;
  border-bottom: 2px solid var(--ink);
}
.overview .sec-label {
  border-right: 2px solid var(--ink);
  padding: 40px 24px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .15em;
  font-weight: 700;
}
.overview .sec-body {
  padding: 40px 48px;
  columns: 2;
  column-gap: 48px;
  font-size: 15px;
  line-height: 1.85;
  color: #333;
}
.overview .sec-body p { margin-bottom: 16px; break-inside: avoid; }

/* --- Explore grid (homepage) --- */
.explore {
  display: grid;
  grid-template-columns: 200px 1fr;
  border-bottom: 2px solid var(--ink);
}
.explore .sec-label {
  border-right: 2px solid var(--ink);
  padding: 40px 24px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .15em;
  font-weight: 700;
}
.explore .grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.explore .grid .cell {
  padding: 28px 24px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  transition: background .15s;
  display: block;
  color: inherit;
}
.explore .grid .cell:nth-child(4n) { border-right: 0; }
.explore .grid .cell:nth-last-child(-n+4) { border-bottom: 0; }
.explore .grid .cell:hover { background: var(--ink); color: var(--paper); }
.explore .grid .cell:hover .cell-lbl { color: var(--paper); opacity: .4; }
.explore .grid .cell .cell-num {
  font-size: 42px;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 10px;
  letter-spacing: -.03em;
}
.explore .grid .cell:hover .cell-num { color: var(--accent); }
.explore .grid .cell h3 {
  font-size: 15px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-bottom: 6px;
}
.explore .grid .cell .cell-lbl {
  font-size: 12px;
  color: #888;
  line-height: 1.6;
  transition: color .15s;
}

/* --- Footer --- */
footer {
  display: grid;
  grid-template-columns: 200px 1fr;
  border-top: 2px solid var(--ink);
}
footer .f-mark {
  border-right: 2px solid var(--ink);
  padding: 28px 24px;
  font-weight: 900;
  font-size: 13px;
  letter-spacing: .1em;
}
footer .f-mark em { font-style: normal; color: var(--accent); }
footer .f-body {
  padding: 28px 48px;
  font-size: 12px;
  color: #888;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* =========================================
   Inner page styles
   ========================================= */

/* --- Page header --- */
.page-header {
  display: grid;
  grid-template-columns: 200px 1fr;
  border-bottom: 2px solid var(--ink);
  min-height: 180px;
}
.page-header .sec-label {
  border-right: 2px solid var(--ink);
  padding: 40px 24px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .15em;
  font-weight: 700;
  color: var(--accent);
}
.page-header .header-body {
  padding: 48px 48px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.page-header .header-body h1 {
  font-size: clamp(32px, 4vw, 56px);
  font-weight: 900;
  line-height: .95;
  text-transform: uppercase;
  letter-spacing: -.02em;
}
.page-header .header-body h1 span { color: var(--accent); }
.page-header .header-body .subtitle {
  font-size: 15px;
  line-height: 1.7;
  max-width: 600px;
  margin-top: 16px;
  color: #444;
}

/* --- Page content --- */
.page-content {
  display: grid;
  grid-template-columns: 200px 1fr;
  border-bottom: 2px solid var(--ink);
}
.page-content .sec-label {
  border-right: 2px solid var(--ink);
  padding: 40px 24px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .15em;
  font-weight: 700;
}
.page-content .content-body {
  padding: 40px 48px;
  font-size: 15px;
  line-height: 1.85;
  color: #333;
  max-width: 900px;
}
.page-content .content-body h2 {
  font-size: 24px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .02em;
  margin-top: 40px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
  color: var(--ink);
}
.page-content .content-body h2:first-child { margin-top: 0; }
.page-content .content-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--ink);
}
.page-content .content-body h4 {
  font-size: 15px;
  font-weight: 700;
  margin-top: 24px;
  margin-bottom: 8px;
  color: var(--accent);
}
.page-content .content-body p {
  margin-bottom: 16px;
}
.page-content .content-body ul,
.page-content .content-body ol {
  margin-bottom: 16px;
  padding-left: 24px;
}
.page-content .content-body li {
  margin-bottom: 8px;
}
.page-content .content-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.page-content .content-body a:hover {
  color: var(--ink);
}
.page-content .content-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 16px 24px;
  margin: 24px 0;
  background: rgba(26, 94, 58, 0.04);
  font-style: italic;
  color: #444;
}
.page-content .content-body .reference-list p {
  padding-left: 2em;
  text-indent: -2em;
  font-size: 13px;
  line-height: 1.6;
  margin-bottom: 10px;
}

/* --- Card grid (reports, methodology) --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0;
}
.card-grid .card {
  padding: 28px 24px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  transition: background .15s;
  display: block;
  color: inherit;
}
.card-grid .card:hover {
  background: var(--ink);
  color: var(--paper);
}
.card-grid .card:hover h3 { color: var(--paper); }
.card-grid .card h3 {
  font-size: 15px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-bottom: 8px;
}
.card-grid .card .card-category {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .15em;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 8px;
}
.card-grid .card .card-desc {
  font-size: 12px;
  color: #888;
  line-height: 1.6;
  transition: color .15s;
}
.card-grid .card:hover .card-desc,
.card-grid .card:hover .card-category { color: var(--paper); opacity: .6; }

/* --- Collapsible report groups --- */
.report-group {
  margin-bottom: 0;
}
.report-group summary {
  cursor: pointer;
  list-style: none;
}
.report-group summary::-webkit-details-marker { display: none; }
.report-group summary::marker { display: none; content: ''; }
.report-group summary h2 {
  position: relative;
  padding-right: 32px;
}
.report-group summary h2::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 400;
  color: var(--accent);
  transition: transform .2s;
}
.report-group[open] summary h2::after {
  content: '\2212';
}

/* --- Team grid (investigators) --- */
.team-group-heading {
  font-size: 18px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .08em;
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--accent);
}
.team-group-heading:first-child { margin-top: 0; }
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 0;
}
.team-grid .team-member {
  padding: 28px 24px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  text-align: center;
}
.team-grid .team-member img {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 16px;
  border: 2px solid var(--rule);
}
.team-grid .team-member h3 {
  font-size: 14px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-bottom: 4px;
}
.team-grid .team-member .affiliation {
  font-size: 12px;
  color: #888;
  line-height: 1.5;
}
.team-grid .team-member .social-links {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 10px;
}
.team-grid .team-member .social-icon {
  color: #888;
  transition: color .15s;
  display: inline-flex;
}
.team-grid .team-member .social-icon:hover {
  color: var(--accent);
}

/* --- Contact form --- */
.contact-form {
  max-width: 560px;
  margin-top: 32px;
}
.contact-form label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .1em;
  font-weight: 700;
  margin-bottom: 6px;
  margin-top: 20px;
}
.contact-form label:first-child { margin-top: 0; }
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 16px;
  font-family: 'Archivo', sans-serif;
  font-size: 14px;
  border: 1px solid var(--rule);
  background: white;
  color: var(--ink);
  transition: border-color .15s;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.contact-form textarea { min-height: 140px; resize: vertical; }
.contact-form button {
  margin-top: 24px;
  padding: 14px 36px;
  background: var(--ink);
  color: var(--paper);
  font-family: 'Archivo', sans-serif;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .12em;
  border: none;
  cursor: pointer;
  transition: background .15s;
}
.contact-form button:hover { background: var(--accent); }
.form-success {
  padding: 24px;
  background: #e8f5e9;
  border-left: 4px solid var(--accent);
  margin-top: 32px;
  max-width: 560px;
}
.form-success p, .form-error p { margin: 0; }
.form-error {
  padding: 24px;
  background: #fce4ec;
  border-left: 4px solid #c62828;
  margin-top: 16px;
  max-width: 560px;
}

/* --- Constructs page --- */
.pill-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}
.pill-filter .pill {
  padding: 8px 16px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  border: 1px solid var(--rule);
  background: transparent;
  cursor: pointer;
  font-family: 'Archivo', sans-serif;
  transition: all .15s;
}
.pill-filter .pill:hover,
.pill-filter .pill.active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

/* --- Constructs table --- */
.constructs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.constructs-table thead th {
  text-align: left;
  padding: 12px 16px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .12em;
  font-weight: 700;
  border-bottom: 2px solid var(--ink);
  color: var(--accent);
}
.constructs-table tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}
.constructs-table tbody tr:hover { background: rgba(26, 94, 58, 0.04); }
.constructs-table tbody td:first-child { font-weight: 600; }
.constructs-table .wave-badges { display: flex; gap: 4px; flex-wrap: wrap; }
.constructs-table .wave-badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  border: 1px solid var(--rule);
  background: transparent;
}
a.wave-badge-link {
  color: var(--accent);
  text-decoration: none;
  border-color: var(--accent);
}
a.wave-badge-link:hover {
  background: var(--accent);
  color: #fff;
}

/* --- Filter categories --- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 24px;
}
.filter-bar .filter-btn {
  padding: 6px 14px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  border: 1px solid var(--rule);
  background: transparent;
  cursor: pointer;
  font-family: 'Archivo', sans-serif;
  transition: all .15s;
}
.filter-bar .filter-btn:hover,
.filter-bar .filter-btn.active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

/* =========================================
   Responsive — Tablet (~960px)
   ========================================= */
@media (max-width: 960px) {
  .topbar { grid-template-columns: 1fr; }
  .topbar .mark { border-right: 0; border-bottom: 2px solid var(--ink); }
  .topbar nav { flex-wrap: wrap; }

  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero .col-label {
    writing-mode: horizontal-tb;
    border-right: 0;
    border-bottom: 1px solid var(--rule);
    padding: 16px 24px;
  }
  .hero .col-main { border-right: 0; }
  .hero .col-side {
    grid-template-rows: auto;
    grid-template-columns: repeat(2, 1fr);
  }
  .hero .col-side .stat-cell { border-right: 1px solid var(--rule); }
  .hero .col-side .stat-cell:nth-child(2n) { border-right: 0; }

  .overview { grid-template-columns: 1fr; }
  .overview .sec-label { border-right: 0; border-bottom: 1px solid var(--ink); padding: 16px 24px; }
  .overview .sec-body { columns: 1; }

  .explore { grid-template-columns: 1fr; }
  .explore .sec-label { border-right: 0; border-bottom: 1px solid var(--ink); padding: 16px 24px; }
  .explore .grid { grid-template-columns: repeat(2, 1fr); }
  .explore .grid .cell:nth-child(4n) { border-right: 1px solid var(--rule); }
  .explore .grid .cell:nth-child(2n) { border-right: 0; }
  .explore .grid .cell { border-bottom: 1px solid var(--rule); }
  .explore .grid .cell:nth-last-child(-n+2) { border-bottom: 0; }

  footer { grid-template-columns: 1fr; }
  footer .f-mark { border-right: 0; border-bottom: 1px solid var(--ink); }

  .page-header { grid-template-columns: 1fr; }
  .page-header .sec-label { border-right: 0; border-bottom: 1px solid var(--ink); padding: 16px 24px; }
  .page-header .header-body { padding: 32px 24px; }

  .page-content { grid-template-columns: 1fr; }
  .page-content .sec-label { border-right: 0; border-bottom: 1px solid var(--ink); padding: 16px 24px; }
  .page-content .content-body { padding: 32px 24px; }
}

/* =========================================
   Responsive — Mobile (~640px)
   ========================================= */
@media (max-width: 640px) {
  .topbar nav a { padding: 12px 12px; font-size: 10px; }
  .topbar .mark { justify-content: space-between; }
  .topbar .nav-toggle { display: block; }
  .topbar nav { display: none; }
  .topbar nav.open { display: flex; }

  .hero .col-main { padding: 32px 20px 28px; }
  .hero .col-side { grid-template-columns: 1fr 1fr; }
  .overview .sec-body { padding: 24px 20px; }

  .explore .grid { grid-template-columns: 1fr; }
  .explore .grid .cell { border-right: 0; border-bottom: 1px solid var(--rule); }
  .explore .grid .cell:last-child { border-bottom: 0; }

  footer .f-body { flex-direction: column; gap: 4px; padding: 20px; }

  .page-header .header-body { padding: 24px 20px; }
  .page-content .content-body { padding: 24px 20px; }

  .card-grid { grid-template-columns: 1fr; }
  .card-grid .card { border-right: 0; }

  .team-grid { grid-template-columns: repeat(2, 1fr); }
}