/* ===== The Berlin Model — shared styles ===== */

:root {
  --bg:        #ffffff;
  --bg-2:      #f5f4ef;
  --ink:       #1a1a1a;
  --muted:     #6b6a64;
  --border:    rgba(0,0,0,0.12);
  --border-2:  rgba(0,0,0,0.06);
  --orange:    #e8590c;
  --radius:    10px;
  --radius-lg: 14px;
  --maxw:      1080px;
  --font:      "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono:      ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* track / sector hues */
  --track-a: #2e7d4f;   /* green  */
  --track-b: #2b6cb0;   /* blue   */
  --track-c: #7c5cbf;   /* lilac  */
  --track-d: #e8590c;   /* orange */
  --track-e: #c79a1e;   /* gold   */
  --sec-life: #c6efce;
  --sec-deep: #bdd7ee;
  --sec-soft: #d9d2e9;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:       #1a1a1a;
    --bg-2:     #262626;
    --ink:      #f5f4ef;
    --muted:    #a8a7a0;
    --border:   rgba(255,255,255,0.14);
    --border-2: rgba(255,255,255,0.07);
    --sec-life: #1f3a28;
    --sec-deep: #1e3247;
    --sec-soft: #2e2640;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 1.5rem; }
.narrow { max-width: 820px; }

a { color: var(--orange); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { line-height: 1.2; font-weight: 700; letter-spacing: -0.01em; }
h2 { font-size: 1.75rem; margin: 0 0 0.4rem; }
h3 { font-size: 1.15rem; margin: 0 0 0.4rem; }
p { margin: 0 0 1rem; }

.dot { color: var(--orange); }
.muted { color: var(--muted); }
.hl { background: #fff0a8; color: #1a1a1a; padding: 0 0.18em; border-radius: 3px; box-decoration-break: clone; -webkit-box-decoration-break: clone; }
@media (prefers-color-scheme: dark) { .hl { background: rgba(255,224,130,0.85); } }
.mono {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border-2);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.brand { font-weight: 800; font-size: 1.05rem; color: var(--ink); letter-spacing: -0.02em; }
.brand:hover { text-decoration: none; }
.nav { display: flex; gap: 1.4rem; align-items: center; }
.nav > a, .nav-item > a { color: var(--muted); font-size: 0.92rem; font-weight: 500; }
.nav a:hover, .nav a.active { color: var(--ink); text-decoration: none; }
.nav-toggle { display: none; background: none; border: 0; color: var(--ink); font-size: 1.5rem; }

/* dropdown */
.nav-item { position: relative; display: flex; align-items: center; height: 60px; }
.nav-item > a .caret { font-size: 0.7em; margin-left: 0.25rem; }
.dropdown {
  position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
  display: none; flex-direction: column; min-width: 200px;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 0.4rem; gap: 0.1rem;
  box-shadow: 0 8px 24px rgba(0,0,0,0.10);
}
.nav-item:hover .dropdown, .nav-item:focus-within .dropdown { display: flex; }
.dropdown a { padding: 0.5rem 0.7rem; border-radius: 6px; font-size: 0.9rem; color: var(--muted); white-space: nowrap; }
.dropdown a:hover { background: var(--bg-2); color: var(--ink); text-decoration: none; }
.dropdown a .sub { display: block; font-size: 0.76rem; color: var(--muted); }
.dropdown a:hover .sub { color: var(--muted); }

@media (max-width: 720px) {
  .nav { display: none; position: absolute; top: 60px; left: 0; right: 0;
    flex-direction: column; gap: 0; background: var(--bg);
    border-bottom: 1px solid var(--border); padding: 0.5rem 0; }
  .nav.open { display: flex; }
  .nav a { display: block; padding: 0.7rem 1.5rem; width: 100%; }
  .nav-toggle { display: block; }
  .nav-item { display: block; height: auto; width: 100%; }
  .nav-item > a .caret { display: none; }
  .dropdown { position: static; transform: none; display: flex; border: 0;
    box-shadow: none; padding: 0; min-width: 0; background: transparent; }
  .dropdown a { padding-left: 2.8rem; font-size: 0.88rem; }
}

/* ===== Draft notice banner ===== */
.draft-banner {
  background: color-mix(in srgb, var(--track-e) 14%, var(--bg));
  border-bottom: 1px solid color-mix(in srgb, var(--track-e) 35%, transparent);
}
.draft-banner .wrap {
  padding-top: 0.5rem; padding-bottom: 0.5rem;
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--ink); text-align: center;
}
.draft-banner b { color: var(--track-e); font-weight: 800; }

/* ===== Hero ===== */
.hero { padding-top: 4.5rem; padding-bottom: 3rem; }
@media (max-width: 720px) { .hero { padding-top: 1rem; } }
.hero h1 { font-size: clamp(2.6rem, 6vw, 4.2rem); margin: 0 0 1rem; letter-spacing: -0.03em; }
.hero .lead { font-size: 1.3rem; color: var(--ink); margin: 0 0 0.6rem; font-weight: 500; }
.hero .sub { font-size: 1.02rem; color: var(--muted); }
.tagline {
  font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--orange); margin: 0 0 1.5rem;
}
.pills { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1.6rem 0 0; }
.pill {
  font-size: 0.82rem; color: var(--muted); background: var(--bg-2);
  border: 1px solid var(--border-2); border-radius: 100px; padding: 0.3rem 0.85rem;
}

/* ===== Buttons ===== */
.btn-row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.8rem; }
.btn {
  display: inline-block; padding: 0.7rem 1.3rem; border-radius: 100px;
  font-weight: 600; font-size: 0.95rem; border: 1px solid transparent;
}
.btn-primary { background: var(--ink); color: var(--bg); }
.btn-primary:hover { text-decoration: none; opacity: 0.88; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--border); }
.btn-ghost:hover { text-decoration: none; background: var(--bg-2); }

/* ===== Sections ===== */
section { padding: 3rem 0; border-top: 1px solid var(--border-2); }
section.flush { border-top: 0; }
.section-head { margin-bottom: 1.8rem; }
.section-head .mono { display: block; margin-bottom: 0.5rem; }

/* part divider — large heading marking the start of the model summary */
.part h2 { font-size: clamp(2.2rem, 5vw, 3rem); letter-spacing: -0.02em; margin: 0 0 0.4rem; }
.part p { color: var(--muted); margin: 0; font-size: 1rem; }

/* ===== Grids / cards ===== */
.grid { display: grid; gap: 1rem; }
.g-3 { grid-template-columns: repeat(3, 1fr); }
.g-2 { grid-template-columns: repeat(2, 1fr); }
.g-4 { grid-template-columns: repeat(4, 1fr); }
.g-5 { grid-template-columns: repeat(5, 1fr); }
@media (max-width: 860px) { .g-3, .g-4, .g-5 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .g-2, .g-3, .g-4, .g-5 { grid-template-columns: 1fr; } }

.card {
  background: var(--bg-2); border: 1px solid var(--border-2);
  border-radius: var(--radius); padding: 1.3rem;
}
.card h3 { font-size: 1.05rem; }
.card p { font-size: 0.95rem; color: var(--muted); margin: 0; }
.card .num { font-family: var(--mono); color: var(--orange); font-size: 0.8rem; }

/* supporter logo wall — white tiles, logos only (always visible in light + dark) */
.logo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 1rem; }
a.supporter-card {
  background: #fff; border: 1px solid rgba(0,0,0,0.09); border-radius: var(--radius);
  height: 128px; display: flex; align-items: center; justify-content: center;
  padding: 1.5rem 1.8rem; text-decoration: none;
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}
a.supporter-card:hover {
  text-decoration: none; transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.13);
}
.supporter-card .logo { max-height: 48px; max-width: 78%; width: auto; object-fit: contain; display: block; }
.supporter-card .logo.logo--wide { max-height: 56px; max-width: 96%; }
.supporter-card:has(.logo--wide) { padding-left: 0.8rem; padding-right: 0.8rem; }

/* combined AUM headline */
.aum { font-size: 1.1rem; color: var(--ink); margin: 0.6rem 0 0; }
.aum strong { color: var(--orange); font-weight: 700; }

/* ===== Tables ===== */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.table-wrap table { min-width: 520px; }
thead th {
  background: var(--ink); color: var(--bg); text-align: left;
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.1em;
  text-transform: uppercase; font-weight: 600; padding: 0.7rem 0.9rem;
}
tbody td { padding: 0.7rem 0.9rem; border-top: 1px solid var(--border-2); vertical-align: middle; }
tbody tr:first-child td { border-top: 0; }
td .strong { font-weight: 700; }

/* track badge */
.badge {
  display: inline-flex; align-items: center; justify-content: center;
  width: 24px; height: 24px; border-radius: 6px; font-weight: 800;
  font-size: 0.8rem; color: #fff;
}
.badge.a { background: var(--track-a); }
.badge.b { background: var(--track-b); }
.badge.c { background: var(--track-c); }
.badge.d { background: var(--track-d); }
.badge.e { background: var(--track-e); }

/* sector row tint — full row background + left accent */
.row-life td { background: #e6f4ea; }
.row-deep td { background: #e5eff9; }
.row-soft td { background: #f0eaf8; }
.row-life td:first-child { box-shadow: inset 3px 0 0 #2e7d4f; }
.row-deep td:first-child { box-shadow: inset 3px 0 0 #2b6cb0; }
.row-soft td:first-child { box-shadow: inset 3px 0 0 #7c5cbf; }
@media (prefers-color-scheme: dark) {
  .row-life td { background: rgba(46,125,79,0.22); }
  .row-deep td { background: rgba(43,108,176,0.22); }
  .row-soft td { background: rgba(124,92,191,0.22); }
}

/* best-practice row */
.row-good td { background: #e6f4ea; }
.row-good td:first-child { box-shadow: inset 3px 0 0 #2e7d4f; }
@media (prefers-color-scheme: dark) { .row-good td { background: rgba(46,125,79,0.20); } }

/* outlier / not-best-practice row */
.row-outlier td { background: #fcebe2; }
.row-outlier td:first-child { box-shadow: inset 3px 0 0 var(--track-d); }
@media (prefers-color-scheme: dark) { .row-outlier td { background: rgba(232,89,12,0.18); } }

/* approaching-best-practice row (not there yet) */
.row-warn td { background: #fdedc8; }
.row-warn td:first-child { box-shadow: inset 3px 0 0 #f0a020; }
@media (prefers-color-scheme: dark) { .row-warn td { background: rgba(240,160,32,0.20); } }

/* ===== "Applies to all" callout ===== */
.callout {
  background: color-mix(in srgb, var(--track-e) 12%, var(--bg));
  border: 1px solid color-mix(in srgb, var(--track-e) 35%, transparent);
  border-radius: var(--radius); padding: 1.3rem;
}
.callout h3 { font-size: 1rem; margin-top: 0; }
.callout .item { margin-bottom: 1rem; }
.callout .item:last-child { margin-bottom: 0; }
.callout .item p { font-size: 0.9rem; color: var(--muted); margin: 0.2rem 0 0; }

/* ===== Corridor rate cards ===== */
.rates { display: grid; gap: 1rem; grid-template-columns: repeat(3, 1fr); }
@media (max-width: 860px) { .rates { grid-template-columns: 1fr; } }
.rate-card { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.rate-card header {
  padding: 0.8rem 1rem; font-weight: 700; font-size: 0.95rem;
  border-bottom: 1px solid var(--border-2); display: flex; align-items: center; gap: 0.5rem;
}
.rate-card table { font-size: 0.88rem; }
.rate-card td, .rate-card th { padding: 0.55rem 1rem; }
.rate-card thead th { background: var(--bg-2); color: var(--muted); }
.rate-card.span-all { grid-column: 1 / -1; }
.rate-body { padding: 0.85rem 1rem; }
.rate-body p { font-size: 0.9rem; margin: 0 0 0.5rem; }
.rate-body p:last-child { margin-bottom: 0; }

/* corridor legend */
.corr-legend { display: flex; flex-wrap: wrap; gap: 1.2rem; margin: 0 0 1.4rem; font-size: 0.88rem; }
.corr-legend b { color: var(--ink); }
.corr-legend span { color: var(--muted); }

/* ===== Expandable ===== */
.expand { margin-top: 1.4rem; }
.expand > summary {
  cursor: pointer; list-style: none; display: inline-flex; align-items: center; gap: 0.45rem;
  font-weight: 600; font-size: 0.9rem; color: var(--ink);
  border: 1px solid var(--border); border-radius: 100px; padding: 0.5rem 1.1rem;
}
.expand > summary::-webkit-details-marker { display: none; }
.expand > summary:hover { background: var(--bg-2); }
.expand > summary .caret { font-size: 0.7em; transition: transform 0.15s ease; }
.expand[open] > summary { margin-bottom: 1.1rem; }
.expand[open] > summary .caret { transform: rotate(180deg); }

.sector-legend { display: flex; flex-wrap: wrap; gap: 1rem; margin: 0 0 0.9rem; font-size: 0.8rem; color: var(--muted); }
.sector-legend span { display: inline-flex; align-items: center; gap: 0.4rem; }
.sector-legend i { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }

/* ===== Stat cards (research) ===== */
.stat .big { font-size: 2.2rem; font-weight: 800; letter-spacing: -0.02em; line-height: 1; }
.stat .big .u { font-size: 1.1rem; font-weight: 600; color: var(--muted); }
.stat .lbl { font-size: 0.9rem; margin: 0.6rem 0 0.6rem; }
.stat .src { font-family: var(--mono); font-size: 0.62rem; color: var(--muted); }
.stat.s-orange .big { color: var(--track-d); }
.stat.s-green  .big { color: var(--track-a); }
.stat.s-blue   .big { color: var(--track-b); }
.stat.s-lilac  .big { color: var(--track-c); }
.stat.s-gold   .big { color: var(--track-e); }

/* ===== Q&A (research arguments) ===== */
.qa { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 0.8rem; overflow: hidden; background: var(--bg-2); }
.qa summary {
  cursor: pointer; padding: 1rem 1.2rem; font-weight: 600; list-style: none;
  display: flex; gap: 0.7rem; align-items: flex-start;
}
.qa summary::-webkit-details-marker { display: none; }
.qa summary .claim { color: var(--ink); font-style: italic; }
.qa summary .tag {
  font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--orange); border: 1px solid color-mix(in srgb, var(--orange) 40%, transparent);
  border-radius: 4px; padding: 0.15rem 0.4rem; white-space: nowrap; margin-top: 0.15rem;
}
.qa[open] summary { border-bottom: 1px solid var(--border-2); }
.qa .answer { padding: 0 1.2rem 1.1rem; font-size: 0.95rem; }
.qa .answer p { margin: 0.9rem 0 0; }

/* ===== closing banner ===== */
.banner {
  background: var(--bg-2); border: 1px solid var(--border-2);
  border-radius: var(--radius-lg); padding: 2rem; text-align: center;
}
.banner h2 { margin-bottom: 0.6rem; }
.banner p { color: var(--muted); max-width: 640px; margin: 0 auto 1.2rem; }

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--border-2); margin-top: 2rem;
  padding: 2rem 0; font-size: 0.85rem; color: var(--muted);
}
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center; }
.site-footer .meta { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.08em; text-transform: uppercase; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--ink); }

/* ===== timeline ===== */
.timeline { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
@media (max-width: 700px) { .timeline { grid-template-columns: 1fr; } }
.phase { border: 1px solid var(--border-2); border-radius: var(--radius); padding: 1.1rem; background: var(--bg-2); }
.phase .wk { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--orange); }
.phase h3 { font-size: 1rem; margin: 0.3rem 0 0.4rem; }
.phase p { font-size: 0.9rem; color: var(--muted); margin: 0; }

/* "coming soon" */
.soon { text-align: center; padding: 5rem 0; }
.soon .mono { display: block; margin-bottom: 1rem; }