/* ============================================================
   VELA — Open Research Institute
   Editorial / observatory aesthetic
   Newsreader (serif display) · Schibsted Grotesk (UI) · JetBrains Mono (labels)
   ============================================================ */

:root {
  /* surfaces */
  --paper: #F4F1E9;
  --paper-2: #ECE7DA;
  --paper-3: #E3DCCB;
  --ink: #0E1620;
  --ink-2: #16202C;
  --ink-soft: #4A5A68;
  --ink-faint: #8A94A0;
  --line: #0e16201f;
  --line-strong: #0e162033;

  /* accent — default "Observatory" teal */
  --signal: #0F9E91;
  --signal-deep: #0A6A61;
  --signal-glow: #19c7b6;
  --warm: #E0A23C;

  /* typography */
  --font-display: "Newsreader", Georgia, serif;
  --font-ui: "Schibsted Grotesk", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  --maxw: 1240px;
  --gutter: clamp(20px, 5vw, 64px);
}

/* ---- palette tweaks ---- */
:root[data-palette="aurora"] {
  --signal: #D98A2B;
  --signal-deep: #9C5E12;
  --signal-glow: #f0a83f;
  --warm: #2B8C9E;
}
:root[data-palette="clinical"] {
  --signal: #2E6CE0;
  --signal-deep: #1E47A0;
  --signal-glow: #4f8bff;
  --warm: #E0A23C;
}

/* ---- font tweaks ---- */
:root[data-display="spectral"] { --font-display: "Spectral", Georgia, serif; }
:root[data-display="fraunces"] { --font-display: "Newsreader", Georgia, serif; } /* reserved */

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 18px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: var(--signal); color: #fff; }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

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

/* ---- type helpers ---- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--signal-deep);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 4px color-mix(in oklab, var(--signal) 22%, transparent);
}
.serif { font-family: var(--font-display); }
.italic { font-style: italic; }
em, .em { font-style: italic; color: var(--signal-deep); }

h1, h2, h3 { font-family: var(--font-display); font-weight: 400; line-height: 1.04; letter-spacing: -0.01em; margin: 0; }

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--paper) 82%, transparent);
  backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid var(--line);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: baseline; gap: 12px; }
.brand__mark {
  font-family: var(--font-display);
  font-size: 25px; font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1;
}
.brand__mark .star { color: var(--signal); }
.brand__sub {
  font-family: var(--font-mono);
  font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--ink-faint);
}
.nav__links { display: flex; align-items: center; gap: 34px; }
.nav__links a { font-size: 15px; color: var(--ink-soft); transition: color .2s; }
.nav__links a:hover { color: var(--ink); }
.nav__links .navcta { color: var(--ink); }

.btn {
  font-family: var(--font-ui);
  font-size: 15px; font-weight: 600;
  display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer; transition: all .22s ease;
  white-space: nowrap;
}
.btn--primary { background: var(--ink); color: var(--paper); }
.btn--primary:hover { background: var(--signal-deep); transform: translateY(-1px); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn--ghost:hover { border-color: var(--ink); background: color-mix(in oklab, var(--ink) 5%, transparent); }
.btn--signal { background: var(--signal); color: #fff; }
.btn--signal:hover { background: var(--signal-deep); transform: translateY(-1px); }
.btn .arr { transition: transform .22s; }
.btn:hover .arr { transform: translate(3px,0); }

.nav__menu-btn { display: none; }

/* ============================================================
   HERO
   ============================================================ */
.hero { position: relative; padding-top: clamp(48px, 9vh, 110px); padding-bottom: clamp(60px, 10vh, 130px); overflow: hidden; }
#constellation { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 0; }
.hero .wrap { position: relative; z-index: 2; }
.hero__grid { display: grid; grid-template-columns: 1.55fr 1fr; gap: 60px; align-items: end; }

.hero__kicker { margin-bottom: 30px; }
.hero h1 {
  font-size: clamp(44px, 6.6vw, 92px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  max-width: 14ch;
}
.hero h1 .light { position: relative; }
.hero__lead {
  margin-top: 30px;
  font-size: clamp(18px, 1.5vw, 22px);
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 52ch;
}
.hero__cta { margin-top: 38px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero__trust {
  grid-column: 1 / -1;
  margin-top: clamp(48px, 7vw, 84px);
  padding-top: 26px;
  border-top: 1px solid var(--line);
  display: flex; gap: clamp(28px, 5vw, 70px); flex-wrap: wrap; align-items: center;
}
.trust-item { display: flex; flex-direction: column; gap: 4px; }
.trust-item .n { font-family: var(--font-display); font-size: clamp(30px, 3.4vw, 46px); line-height: 1; }
.trust-item .n .u { font-family: var(--font-mono); font-size: 0.42em; color: var(--signal-deep); vertical-align: super; margin-left: 2px; }
.trust-item .l { font-size: 13.5px; color: var(--ink-soft); max-width: 22ch; line-height: 1.35; }
.trust-sep { width: 1px; align-self: stretch; background: var(--line); }

/* hero side note card */
.hero__aside {
  font-size: 15px; color: var(--ink-soft);
  border-left: 2px solid var(--signal);
  padding-left: 20px;
  line-height: 1.5;
}
.hero__aside b { color: var(--ink); font-weight: 600; }

/* ============================================================
   SECTION SCAFFOLD
   ============================================================ */
section { position: relative; }
.section-pad { padding-block: clamp(80px, 11vw, 150px); }
.section-head { max-width: 760px; margin-bottom: clamp(44px, 6vw, 72px); }
.section-head h2 { font-size: clamp(34px, 4.6vw, 60px); margin-top: 20px; letter-spacing: -0.015em; }
.section-head p { margin-top: 22px; font-size: clamp(17px, 1.3vw, 20px); color: var(--ink-soft); line-height: 1.6; }

/* ---- The gap / problem (dark) ---- */
.gap { background: var(--ink); color: var(--paper); }
.gap .eyebrow { color: var(--signal-glow); }
.gap .eyebrow::before { background: var(--signal-glow); }
.gap .section-head p { color: #c5cdd6; }
.gap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: #ffffff14; border: 1px solid #ffffff1f; border-radius: 18px; overflow: hidden; }
.gap-cell { background: var(--ink); padding: 38px 34px; }
.gap-cell .big { font-family: var(--font-display); font-size: clamp(46px, 5.6vw, 76px); line-height: 0.95; letter-spacing: -0.02em; }
.gap-cell .big .u { font-size: 0.34em; color: var(--signal-glow); font-family: var(--font-mono); display: block; margin-top: 10px; letter-spacing: 0.04em; }
.gap-cell p { margin: 18px 0 0; color: #aeb8c2; font-size: 15.5px; line-height: 1.5; }
.gap-cell:nth-child(2) .big { color: var(--signal-glow); }

/* ============================================================
   HOW IT WORKS
   ============================================================ */
.steps { display: grid; gap: 22px; }
.step {
  display: grid; grid-template-columns: 88px 1fr auto; gap: 36px; align-items: start;
  padding: 38px 40px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 20px;
  position: relative;
  transition: border-color .25s, transform .25s, box-shadow .25s;
}
.step:hover { border-color: var(--line-strong); transform: translateY(-2px); box-shadow: 0 24px 50px -34px #0e162055; }
.step__num { font-family: var(--font-mono); font-size: 13px; color: var(--signal-deep); letter-spacing: 0.1em; padding-top: 8px; }
.step__num span { display: block; font-family: var(--font-display); font-size: 40px; color: var(--ink); letter-spacing: 0; margin-top: 6px; }
.step__body h3 { font-size: clamp(24px, 2.4vw, 31px); }
.step__body p { margin: 12px 0 0; color: var(--ink-soft); font-size: 16.5px; max-width: 56ch; line-height: 1.55; }
.step__tag { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.13em; color: var(--ink-faint); padding-top: 12px; white-space: nowrap; }
.step__tag b { color: var(--signal-deep); font-weight: 500; }

.loop-note { margin-top: 30px; text-align: center; font-size: 15px; color: var(--ink-soft); font-family: var(--font-mono); letter-spacing: 0.04em; }
.loop-note span { color: var(--signal-deep); }

/* ============================================================
   OPEN SCIENCE pledge
   ============================================================ */
.open { background: var(--paper-2); }
.open-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 6vw, 88px); align-items: center; }
.pledge { font-family: var(--font-display); font-size: clamp(30px, 3.6vw, 50px); line-height: 1.12; letter-spacing: -0.015em; }
.pledge em { color: var(--signal-deep); }
.open-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 2px; }
.open-list li { display: grid; grid-template-columns: auto 1fr; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--line); align-items: start; }
.open-list li:first-child { padding-top: 0; }
.open-list .ic { width: 34px; height: 34px; border-radius: 9px; background: color-mix(in oklab, var(--signal) 14%, var(--paper)); color: var(--signal-deep); display: grid; place-items: center; }
.open-list h4 { margin: 0 0 4px; font-family: var(--font-ui); font-size: 16.5px; font-weight: 600; }
.open-list p { margin: 0; font-size: 15px; color: var(--ink-soft); line-height: 1.5; }

/* ============================================================
   GET INVOLVED — three doors
   ============================================================ */
.doors { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.door {
  display: flex; flex-direction: column;
  padding: 40px 34px;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: var(--paper);
  min-height: 360px;
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.door:hover { transform: translateY(-4px); box-shadow: 0 30px 60px -40px #0e162066; border-color: var(--line-strong); }
.door--feature { background: var(--ink); color: var(--paper); border-color: transparent; }
.door--feature .door__k { color: var(--signal-glow); }
.door--feature .door__d { color: #b9c2cc; }
.door__k { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.15em; text-transform: uppercase; color: var(--signal-deep); }
.door__t { font-family: var(--font-display); font-size: 29px; margin-top: 20px; line-height: 1.08; }
.door__d { margin-top: 14px; font-size: 15.5px; color: var(--ink-soft); line-height: 1.55; flex: 1; }
.door__link { margin-top: 24px; font-size: 15px; font-weight: 600; display: inline-flex; align-items: center; gap: 8px; color: inherit; }
.door--feature .door__link { color: var(--signal-glow); }
.door__link .arr { transition: transform .22s; }
.door:hover .door__link .arr { transform: translateX(4px); }

/* ============================================================
   CLOSING / DONATE band
   ============================================================ */
.closer { background: var(--ink); color: var(--paper); text-align: center; overflow: hidden; position: relative; }
.closer .wrap { position: relative; z-index: 2; }
.closer h2 { font-size: clamp(38px, 6vw, 86px); line-height: 1.0; max-width: 18ch; margin: 0 auto; }
.closer h2 em { color: var(--signal-glow); }
.closer p { margin: 28px auto 0; max-width: 56ch; color: #c5cdd6; font-size: 19px; }
.closer__cta { margin-top: 40px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.closer .btn--ghost { color: var(--paper); border-color: #ffffff3a; }
.closer .btn--ghost:hover { border-color: var(--paper); background: #ffffff12; }

/* ============================================================
   FOOTER
   ============================================================ */
.foot { background: var(--ink-2); color: #aeb8c2; padding-block: 64px 40px; }
.foot__top { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 48px; border-bottom: 1px solid #ffffff14; }
.foot__brand .brand__mark { color: var(--paper); }
.foot__brand p { margin-top: 18px; font-size: 14.5px; max-width: 34ch; line-height: 1.55; }
.foot col, .foot__col { display: flex; flex-direction: column; }
.foot__col h5 { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-faint); margin: 0 0 18px; font-weight: 500; }
.foot__col a { font-size: 14.5px; padding: 7px 0; transition: color .2s; }
.foot__col a:hover { color: var(--paper); }
.foot__bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 28px; font-size: 13px; color: var(--ink-faint); flex-wrap: wrap; gap: 14px; }
.foot__bottom .badge { font-family: var(--font-mono); letter-spacing: 0.06em; }

/* ============================================================
   THE TEAM — what your funding assembles
   ============================================================ */
.team { background: var(--paper-2); }
.team-sheet {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: clamp(28px, 4vw, 48px);
  box-shadow: 0 40px 80px -60px #0e162055;
}
.team-sheet__head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 20px; flex-wrap: wrap;
  padding-bottom: 26px; margin-bottom: 30px;
  border-bottom: 1px solid var(--line);
}
.team-sheet__title { font-family: var(--font-display); font-size: clamp(22px, 2.4vw, 30px); }
.team-sheet__title .cond { color: var(--signal-deep); font-style: italic; }
.team-sheet__meta { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-faint); display: flex; align-items: center; gap: 9px; }
.team-sheet__meta .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 0 4px color-mix(in oklab, var(--signal) 22%, transparent); }

.team-track { margin-top: 6px; }
.team-track + .team-track { margin-top: 30px; }
.track-label { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-soft); margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
.track-label .ln { flex: 1; height: 1px; background: var(--line); }
.roster { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }

/* person card */
.member { background: var(--paper-2); border: 1px solid var(--line); border-radius: 16px; padding: 22px; transition: transform .25s, box-shadow .25s; }
.member:hover { transform: translateY(-3px); box-shadow: 0 20px 40px -30px #0e162066; }
.member__ava { width: 42px; height: 42px; border-radius: 50%; background: var(--ink); color: var(--paper); font-family: var(--font-display); font-size: 18px; display: grid; place-items: center; margin-bottom: 16px; }
.member__role { font-family: var(--font-display); font-size: 19px; line-height: 1.15; }
.member__do { margin: 9px 0 0; font-size: 13.5px; color: var(--ink-soft); line-height: 1.5; }
.member__meta { margin-top: 14px; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-faint); }

/* agent card (dark, machine) */
.agent { background: var(--ink); color: var(--paper); border: 1px solid transparent; border-radius: 16px; padding: 22px; position: relative; overflow: hidden; transition: transform .25s; }
.agent:hover { transform: translateY(-3px); }
.agent__glyph { width: 42px; height: 42px; border-radius: 11px; background: color-mix(in oklab, var(--signal) 22%, var(--ink)); display: grid; place-items: center; margin-bottom: 16px; color: var(--signal-glow); }
.agent__name { font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.04em; color: var(--signal-glow); }
.agent__do { margin: 9px 0 0; font-size: 13.5px; color: #b9c2cc; line-height: 1.5; }
.agent__meta { margin-top: 14px; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase; color: #6f7d89; display: flex; align-items: center; gap: 7px; }
.agent__meta .pulse { width: 6px; height: 6px; border-radius: 50%; background: var(--signal-glow); animation: pulse 2.2s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: .35; } 50% { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .agent__meta .pulse { animation: none; } }

/* scale-with-funding strip */
.team-scale { margin-top: 30px; padding-top: 26px; border-top: 1px solid var(--line); display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.team-scale__lead { font-size: 15px; color: var(--ink-soft); max-width: 30ch; line-height: 1.5; }
.team-scale__lead b { color: var(--ink); font-weight: 600; }
.tiers { display: flex; gap: 10px; flex: 1; min-width: 280px; flex-wrap: wrap; }
.tier { flex: 1; min-width: 150px; border: 1px solid var(--line); border-radius: 13px; padding: 16px 18px; background: var(--paper-2); }
.tier__k { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--signal-deep); }
.tier__t { font-family: var(--font-display); font-size: 18px; margin-top: 7px; }
.tier__d { font-size: 12.5px; color: var(--ink-soft); margin-top: 6px; line-height: 1.45; }
.tier:last-child { background: var(--ink); border-color: transparent; }
.tier:last-child .tier__t { color: var(--paper); }
.tier:last-child .tier__d { color: #aeb8c2; }
.tier:last-child .tier__k { color: var(--signal-glow); }

@media (max-width: 980px) {
  .roster { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .roster { grid-template-columns: 1fr; }
}

/* ============================================================
   reveal animation
   ============================================================ */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .8s cubic-bezier(.2,.7,.2,1), transform .8s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 980px) {
  .hero__grid { grid-template-columns: 1fr; gap: 38px; }
  .hero__aside { border-left: 2px solid var(--signal); }
  .gap-grid { grid-template-columns: 1fr; }
  .open-grid { grid-template-columns: 1fr; gap: 40px; }
  .doors { grid-template-columns: 1fr; }
  .step { grid-template-columns: 64px 1fr; }
  .step__tag { grid-column: 2; padding-top: 0; }
  .foot__top { grid-template-columns: 1fr 1fr; gap: 32px; }
  .foot__brand { grid-column: 1 / -1; }
}
@media (max-width: 720px) {
  body { font-size: 17px; }
  .nav__links { display: none; }
  .nav__links.open { display: flex; position: absolute; top: 72px; left: 0; right: 0; flex-direction: column; background: var(--paper); padding: 22px var(--gutter); gap: 18px; border-bottom: 1px solid var(--line); }
  .nav__menu-btn { display: inline-flex; background: none; border: 1px solid var(--line-strong); border-radius: 10px; width: 42px; height: 42px; align-items: center; justify-content: center; cursor: pointer; }
  .hero__trust { gap: 26px 30px; }
  .trust-sep { display: none; }
  .step { grid-template-columns: 1fr; gap: 14px; padding: 28px 24px; }
  .step__num { display: flex; align-items: baseline; gap: 12px; }
  .step__num span { margin: 0; }
}