/* =========================================================
   Resonance — site styles
   Type: Source Serif 4 + Source Sans 3 + JetBrains Mono
   Emphasis: bold cobalt only. Orange reserved for data + brand moments.
========================================================= */

:root {
  --cobalt: #0F2A47;
  --cobalt-08: rgba(15, 42, 71, 0.08);
  --cobalt-12: rgba(15, 42, 71, 0.12);
  --cobalt-20: rgba(15, 42, 71, 0.20);
  --cobalt-40: rgba(15, 42, 71, 0.40);
  --warm: #FAFAF7;
  --cream: #F2EFE7;
  --ink: #0A1628;
  --slate: #2E3B4E;
  --body: #4A5666;
  --signal: #2E7D5F;
  --orange: #F47A21;

  --serif: "Source Serif 4", "DejaVu Serif", Georgia, serif;
  --sans:  "Source Sans 3", "DejaVu Sans", -apple-system, system-ui, sans-serif;
  --mono:  "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --gutter: clamp(20px, 4vw, 64px);
  --max: 1440px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--warm);
  color: var(--body);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }

/* ------- layout ------- */
.wrap {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section-tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cobalt-40);
  text-transform: uppercase;
}

/* ------- nav ------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--warm) 92%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, background .25s ease;
}
.nav.is-scrolled { border-bottom-color: var(--cobalt-12); }

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

.brand { display: flex; align-items: center; color: var(--ink); }
.brand img { height: 26px; width: auto; display: block; }

.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--slate);
  position: relative;
  padding: 6px 0;
  letter-spacing: 0.005em;
  transition: color .2s ease;
}
.nav-links a:hover { color: var(--cobalt); }
.nav-links a.active { color: var(--cobalt); font-weight: 700; }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--cobalt);
}

.nav-cta {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--warm);
  background: var(--cobalt);
  padding: 10px 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background .2s ease;
}
.nav-cta span { white-space: nowrap; }
.nav-cta:hover { background: var(--ink); }
.nav-cta svg { width: 12px; height: 12px; }

.nav-toggle { display: none; }

/* ------- hero ------- */
.hero {
  position: relative;
  padding-top: clamp(80px, 14vh, 160px);
  padding-bottom: clamp(80px, 14vh, 160px);
  overflow: hidden;
  isolation: isolate;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(36px, 6vw, 80px);
}
.hero-headline {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(40px, 6.2vw, 88px);
  line-height: 1.04;
  letter-spacing: -0.015em;
  color: var(--ink);
  max-width: 18ch;
  margin: 0;
  text-wrap: balance;
}
.hero-headline em {
  font-style: normal;
  font-weight: 700;
  color: var(--cobalt);
}
.hero-ripple {
  position: absolute;
  right: -10vw;
  top: 50%;
  transform: translateY(-50%);
  width: min(78vw, 920px);
  aspect-ratio: 1;
  pointer-events: none;
  z-index: -1;
  opacity: 0.10;
}
.hero-ripple .hero-symbol {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  animation: ripple-pulse 9s ease-in-out infinite;
  transform-origin: 50% 50%;
}
@keyframes ripple-pulse {
  0%, 100% { transform: scale(1); }
  50%       { transform: scale(1.04); }
}

/* ------- generic section ------- */
section.block {
  padding-block: clamp(80px, 11vw, 160px);
  position: relative;
}
section.block.cream { background: var(--cream); }

.block-head {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: clamp(24px, 4vw, 64px);
  margin-bottom: clamp(40px, 6vw, 80px);
  align-items: start;
}
.block-head .num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cobalt);
  padding-top: 14px;
  position: relative;
}
.block-head .num::before {
  content: "";
  display: block;
  width: 32px;
  height: 2px;
  background: var(--orange);
  margin-bottom: 14px;
}
.block-head .title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(32px, 4.2vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0;
  text-wrap: balance;
}
.block-head .title em {
  font-style: normal;
  font-weight: 700;
  color: var(--cobalt);
}
.block-head .lede {
  margin-top: 18px;
  font-family: var(--serif);
  font-size: clamp(18px, 1.5vw, 22px);
  line-height: 1.45;
  color: var(--slate);
  max-width: 56ch;
}

/* ------- §02 theory ------- */
.theory-body {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: clamp(24px, 4vw, 64px);
}
.theory-body .col { max-width: 64ch; }
.theory-body p {
  margin: 0 0 1.25em;
  font-size: 18px;
  line-height: 1.65;
  color: var(--body);
}
.theory-body p strong { color: var(--cobalt); font-weight: 700; }

/* ------- §03 cohort ------- */
.cohort-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(20px, 2.4vw, 40px);
}
.lead { display: flex; flex-direction: column; gap: 16px; }

.portrait {
  position: relative;
  aspect-ratio: 4 / 5;
  background: var(--cobalt-08);
  overflow: hidden;
}
.portrait img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(0.15) contrast(1.02);
}
.portrait::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    -28deg,
    transparent 0, transparent 12px,
    var(--cobalt-12) 12px, var(--cobalt-12) 13px
  );
  pointer-events: none;
  opacity: 0;
}
.portrait:not(:has(img))::before { opacity: 1; }

.lead .name {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(22px, 2vw, 28px);
  line-height: 1.15;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.lead .role {
  font-size: 14px;
  color: var(--slate);
  line-height: 1.4;
}
.lead .quote { display: none; }

.lead .links {
  margin-top: 6px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--cobalt);
}
.lead .links a {
  display: grid;
  grid-template-columns: 22px 1fr;
  align-items: baseline;
  gap: 8px;
  padding: 4px 0;
  border-top: 1px solid var(--cobalt-12);
  transition: color .15s ease;
}
.lead .links a:first-child { border-top: 1px solid var(--cobalt-20); }
.lead .links a:hover { color: var(--ink); }
.lead .links .plat {
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cobalt-40);
  font-size: 10px;
}
.lead .links .handle {
  font-size: 12px;
  letter-spacing: 0;
  text-transform: none;
  color: var(--cobalt);
}
.lead .links a:hover .handle { color: var(--ink); }

.cohort-divider {
  margin: clamp(48px, 6vw, 80px) 0 clamp(24px, 3vw, 40px);
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: clamp(24px, 4vw, 64px);
  align-items: center;
}
.cohort-divider .label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cobalt);
}
.cohort-divider .rule { height: 1px; background: var(--cobalt-12); }

.secondary-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(20px, 2.4vw, 40px);
}
.sec-lead {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 20px;
  align-items: center;
  padding: 20px 0;
  border-top: 1px solid var(--cobalt-12);
}
.sec-lead:last-child { border-bottom: 1px solid var(--cobalt-12); }
.sec-lead.nolinerule { border-bottom: 0 !important; }

.sec-portrait {
  aspect-ratio: 1;
  width: 80px;
  background: var(--cobalt-08);
  position: relative;
  overflow: hidden;
}
.sec-portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(0.15) contrast(1.02);
}
.sec-portrait::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    -28deg,
    transparent 0, transparent 8px,
    var(--cobalt-12) 8px, var(--cobalt-12) 9px
  );
  pointer-events: none;
  opacity: 0;
}
.sec-portrait:not(:has(img))::before { opacity: 1; }

.sec-info .name { font-family: var(--serif); font-weight: 700; font-size: 20px; color: var(--ink); line-height: 1.2; }
.sec-info .role { font-size: 14px; color: var(--slate); line-height: 1.3; margin-top: 2px; }

.sec-link {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--cobalt);
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 6px;
}
.sec-link .plat { font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--cobalt-40); font-size: 10px; }
.sec-link .handle { font-size: 13px; }
.sec-link:hover, .sec-link:hover .handle { color: var(--ink); }

/* ------- §04 results ------- */
.results-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(20px, 2.4vw, 36px);
}
.stat { display: flex; flex-direction: column; gap: 18px; }
.stat-ring { position: relative; aspect-ratio: 1; width: 100%; max-width: 220px; }
.stat-symbol {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  transition: opacity .3s ease, transform .3s ease;
}
.stat[data-state="over"]  .stat-symbol { transform: scale(1.0); opacity: 0.95; }
.stat[data-state="pace"]  .stat-symbol { transform: scale(0.78); opacity: 0.55; }
.stat[data-state="under"] .stat-symbol { transform: scale(0.6); opacity: 0.4; filter: hue-rotate(-200deg) saturate(2); }

.stat-num {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(32px, 3.8vw, 52px);
  line-height: 1;
  color: var(--ink);
  letter-spacing: -0.015em;
}
.stat-label { font-family: var(--sans); font-size: 16px; color: var(--slate); line-height: 1.4; }
.stat-meter {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 4px;
  padding-top: 14px;
  border-top: 1px solid var(--cobalt-12);
}
.stat-meter .pct { font-family: var(--serif); font-weight: 700; font-size: 20px; color: var(--orange); }
.stat-meter .pct.behind { color: var(--signal); }
.stat-meter .target { font-family: var(--mono); font-size: 11px; letter-spacing: 0.10em; text-transform: uppercase; color: var(--cobalt-40); }

.results-frame {
  margin-bottom: clamp(40px, 6vw, 64px);
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: clamp(24px, 4vw, 64px);
}
.results-frame .label { font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--cobalt); padding-top: 8px; }
.results-frame .body { font-family: var(--serif); font-size: clamp(20px, 1.8vw, 26px); line-height: 1.45; color: var(--slate); max-width: 56ch; }

.results-methodology {
  margin-top: clamp(40px, 4vw, 56px);
  padding-top: 18px;
  border-top: 1px solid var(--cobalt-12);
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: clamp(24px, 4vw, 64px);
}
.results-methodology .label { font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--cobalt); padding-top: 2px; }
.results-methodology .body { font-family: var(--sans); font-size: 13px; line-height: 1.55; color: var(--body); max-width: 72ch; }

/* ------- §05 team ------- */
.funder-anchor {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.25;
  color: var(--ink);
  letter-spacing: -0.01em;
  max-width: 32ch;
  margin: 0 0 clamp(48px, 6vw, 80px);
  text-wrap: balance;
}
.funder-anchor strong { color: var(--orange); font-weight: 700; }

.team-grid {
  display: grid;
  grid-template-columns: 220px 1fr 1fr;
  gap: clamp(24px, 4vw, 64px);
}
.team-grid .label { font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--cobalt); padding-top: 8px; }

.person {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--cobalt-20);
}
.person .name { font-family: var(--serif); font-weight: 700; font-size: clamp(22px, 2vw, 28px); line-height: 1.15; color: var(--ink); letter-spacing: -0.005em; }
.person .role { font-size: 14px; color: var(--slate); }
.person .bio { margin-top: 14px; display: flex; flex-direction: column; gap: 12px; }
.person .bio p { margin: 0; font-family: var(--sans); font-size: 15px; line-height: 1.55; color: var(--body); }
.person .bio em { font-style: italic; color: var(--ink); }

/* ------- §06 contact ------- */
.contact {
  background: var(--ink);
  color: var(--warm);
  position: relative;
  overflow: hidden;
}
.contact .block-head .num { background-color: var(--ink); }
.contact .block-head .num::before { background: var(--orange); }
.contact .block-head .title { color: var(--warm); }

.contact-headline {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(40px, 6vw, 88px);
  line-height: 1.05;
  letter-spacing: -0.015em;
  color: var(--warm);
  margin: 0 0 32px;
  max-width: 18ch;
  text-wrap: balance;
}
.contact-headline .who { display: block; color: color-mix(in oklab, var(--warm) 55%, transparent); }

.email-door { display: inline-flex; flex-direction: column; gap: 16px; margin-top: 8px; }
.email-door .label { font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: color-mix(in oklab, var(--warm) 60%, transparent); }

.email {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 56px);
  line-height: 1;
  color: var(--warm);
  letter-spacing: -0.01em;
  display: inline-flex;
  align-items: center;
  gap: 16px;
  padding-bottom: 8px;
  border: none;
  border-bottom: 2px solid color-mix(in oklab, var(--warm) 30%, transparent);
  cursor: pointer;
  transition: border-color .2s ease;
  background: transparent;
}
.email:hover { border-bottom-color: var(--warm); }
.email .copy-tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 500;
  color: color-mix(in oklab, var(--warm) 55%, transparent);
  padding: 6px 10px;
  border: 1px solid color-mix(in oklab, var(--warm) 30%, transparent);
  align-self: center;
  transition: all .2s ease;
}
.email .copy-tag.copied { color: var(--ink); background: var(--warm); border-color: var(--warm); }

.contact-ripple {
  position: absolute;
  left: -10vw;
  bottom: -20vw;
  width: 60vw;
  aspect-ratio: 1;
  pointer-events: none;
  opacity: 0.10;
}
.contact-ripple img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  filter: brightness(0) invert(1);
}

/* ------- footer ------- */
.footer { padding: 40px 0 56px; background: var(--warm); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.footer img { height: 22px; opacity: 0.9; }
.footer .credit { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--cobalt-40); }

/* ------- divider ------- */
.divider { display: flex; justify-content: center; padding: 24px 0; }
.divider img, .divider svg { width: 28px; height: 28px; opacity: 0.55; object-fit: contain; }

/* ------- responsive ------- */
@media (max-width: 960px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px; height: 40px;
    background: transparent;
    border: 1px solid var(--cobalt-20);
    color: var(--cobalt);
    cursor: pointer;
  }
  .nav-toggle svg { width: 16px; height: 16px; }
  .nav.is-open .nav-links {
    display: flex;
    position: absolute;
    top: 72px; left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--warm);
    padding: 16px var(--gutter);
    border-bottom: 1px solid var(--cobalt-12);
  }
  .nav.is-open .nav-links a { padding: 14px 0; border-bottom: 1px solid var(--cobalt-08); font-size: 16px; }

  .block-head { grid-template-columns: 1fr; gap: 16px; }
  .block-head .num { padding-top: 0; }
  .theory-body { grid-template-columns: 1fr; }
  .cohort-grid { grid-template-columns: 1fr; }
  .cohort-divider { grid-template-columns: 1fr; }
  .secondary-grid { grid-template-columns: 1fr; }
  .results-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .results-frame, .results-methodology { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .stat-ring { max-width: 240px; }
}

@media (max-width: 600px) {
  .results-grid { grid-template-columns: 1fr; gap: 48px; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-ripple .hero-symbol { animation: none; }
  html { scroll-behavior: auto; }
}