/* =====================================================================
   Reason Venture Partners — site.css
   Single shared stylesheet. Monochrome, editorial, institutional.
   Mobile-first. No external dependencies.
   ===================================================================== */

/* ---- Fonts (self-hosted) ------------------------------------------- */
@font-face {
  font-family: "Space Grotesk";
  src: url("../fonts/space-grotesk-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Space Grotesk";
  src: url("../fonts/space-grotesk-700.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* ---- Design tokens ------------------------------------------------- */
:root {
  --ink: #111111;
  --ink-soft: #2b2b2b;
  --muted: #6b6b66;
  --paper: #ffffff;
  --tint: #f6f5f2;
  --tint-2: #efede8;
  --line: #e6e4df;
  --line-strong: #d6d3cc;
  --accent: #1f3a5f;        /* sober ink-blue, used sparingly */
  --focus: #1f6feb;          /* high-visibility focus ring */

  --font-display: "Space Grotesk", "Helvetica Neue", Arial, system-ui, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "Apple Color Emoji", sans-serif;

  --measure: 65ch;
  --container: 1180px;
  --gutter: clamp(1.25rem, 5vw, 4rem);
  --section-y: clamp(3.5rem, 9vw, 7.5rem);
  --radius: 14px;

  --t-fast: 160ms cubic-bezier(.2,.6,.2,1);
  --t: 280ms cubic-bezier(.2,.6,.2,1);
}

/* ---- Reset / base -------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg, picture { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
button { font: inherit; color: inherit; cursor: pointer; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-wrap: balance;
}
h1 { font-size: clamp(2.4rem, 1.6rem + 4vw, 4.4rem); }
h2 { font-size: clamp(1.8rem, 1.3rem + 2.4vw, 2.9rem); }
h3 { font-size: clamp(1.2rem, 1rem + 0.9vw, 1.55rem); letter-spacing: -0.01em; }
p { text-wrap: pretty; }

/* ---- Layout helpers ----------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.measure { max-width: var(--measure); }
.section { padding-block: var(--section-y); }
.section--tint { background: var(--tint); }
.eyebrow {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1rem;
}

/* ---- Skip link ---------------------------------------------------- */
.skip-link {
  position: absolute;
  left: 1rem; top: -100%;
  background: var(--ink);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 8px;
  z-index: 200;
  transition: top var(--t-fast);
}
.skip-link:focus { top: 1rem; }

/* ---- Focus visibility --------------------------------------------- */
:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 3px;
}

/* ---- Header / nav ------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.86);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 1rem;
}
.wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--ink);
  line-height: 1;
  display: inline-flex;
  align-items: baseline;
  gap: 0.55rem;
}
.wordmark__mark { font-weight: 700; }
.wordmark__sub {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}
.primary-nav { display: flex; align-items: center; gap: clamp(1rem, 2.4vw, 2.25rem); }
.primary-nav a {
  position: relative;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.97rem;
  color: var(--ink-soft);
  padding: 0.4rem 0;
  transition: color var(--t-fast);
}
.primary-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%;
  height: 1.5px;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t);
}
.primary-nav a:hover { color: var(--ink); }
.primary-nav a:hover::after,
.primary-nav a[aria-current="page"]::after { transform: scaleX(1); }
.primary-nav a[aria-current="page"] { color: var(--ink); }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: transparent;
  align-items: center;
  justify-content: center;
}
.nav-toggle__bars, .nav-toggle__bars::before, .nav-toggle__bars::after {
  content: "";
  display: block;
  width: 18px; height: 2px;
  background: var(--ink);
  transition: transform var(--t-fast), opacity var(--t-fast);
}
.nav-toggle__bars { position: relative; }
.nav-toggle__bars::before { position: absolute; top: -6px; left: 0; }
.nav-toggle__bars::after  { position: absolute; top: 6px;  left: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after  { transform: translateY(-6px) rotate(-45deg); }

/* ---- Buttons ------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  text-decoration: none;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  border: 1.5px solid var(--ink);
  background: var(--ink);
  color: #fff;
  transition: transform var(--t-fast), background var(--t-fast), color var(--t-fast), box-shadow var(--t);
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 24px -12px rgba(0,0,0,.5); }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: #fff; }
.btn .arrow { transition: transform var(--t-fast); }
.btn:hover .arrow { transform: translateX(3px); }

/* ---- Hero (home) -------------------------------------------------- */
.hero { padding-block: clamp(4rem, 11vw, 9rem) clamp(3rem, 7vw, 6rem); }
.hero__lead {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.05;
  font-size: clamp(2.1rem, 1.1rem + 5.4vw, 5rem);
  max-width: 18ch;
}
.hero__lead .accent { color: var(--accent); }
.hero__sub {
  margin-top: 1.75rem;
  font-size: clamp(1.05rem, 1rem + 0.5vw, 1.3rem);
  color: var(--muted);
  max-width: 52ch;
}
.hero__actions { margin-top: 2.5rem; display: flex; flex-wrap: wrap; gap: 0.9rem; }

/* ---- Logo strip (home) -------------------------------------------- */
.logos { border-top: 1px solid var(--line); }
.logos__grid {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(1rem, 3vw, 2rem);
  align-items: center;
  margin: 2.5rem 0 0;
}
.logos__item {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.75rem 1.5rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-height: 120px;
  transition: border-color var(--t), transform var(--t);
}
.logos__item:hover { border-color: var(--line-strong); transform: translateY(-3px); }
.logos__item img {
  max-height: 52px;
  width: auto;
  object-fit: contain;
  opacity: 0.9;
  transition: opacity var(--t);
}
.logos__item:hover img { opacity: 1; }

/* ---- Page header (interior pages) --------------------------------- */
.page-head { padding-block: clamp(3rem, 7vw, 6rem) clamp(2rem, 4vw, 3rem); }
.page-head__intro {
  margin-top: 1.5rem;
  font-size: clamp(1.1rem, 1rem + 0.6vw, 1.4rem);
  color: var(--ink-soft);
  max-width: 60ch;
  line-height: 1.55;
}

/* ---- Portfolio ---------------------------------------------------- */
.pf-hero-img {
  margin: 0 auto clamp(2rem,5vw,3.5rem);
  max-width: 760px;
  width: 100%;
}
.pf-section + .pf-section { margin-top: clamp(2.5rem, 6vw, 4.5rem); }
.pf-section__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 2rem;
}
.pf-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.25rem, 3vw, 1.75rem);
}
.pf-card {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  padding: clamp(1.5rem, 3vw, 2.25rem);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--t), transform var(--t), box-shadow var(--t);
}
.pf-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-4px);
  box-shadow: 0 24px 48px -32px rgba(0,0,0,.35);
}
.pf-card__logo {
  height: 60px;
  display: flex;
  align-items: center;
}
.pf-card__logo img { max-height: 56px; width: auto; }
.pf-card__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: -0.01em;
}
.pf-card__desc { color: var(--ink-soft); line-height: 1.6; }
.pf-card__link {
  margin-top: auto;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.pf-card:hover .pf-card__link .arrow { transform: translateX(3px); }
.pf-card__link .arrow { transition: transform var(--t-fast); }

/* ---- Team --------------------------------------------------------- */
.team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  margin-top: clamp(2.5rem, 5vw, 3.5rem);
}
.partner-card {
  display: block;
  text-decoration: none;
  color: inherit;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--paper);
  transition: transform var(--t), box-shadow var(--t), border-color var(--t);
}
.partner-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 28px 56px -36px rgba(0,0,0,.4);
  border-color: var(--line-strong);
}
.partner-card__img { aspect-ratio: 4 / 5; overflow: hidden; background: var(--tint-2); }
.partner-card__img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 600ms cubic-bezier(.2,.6,.2,1);
}
.partner-card:hover .partner-card__img img { transform: scale(1.04); }
.partner-card__body { padding: 1.4rem 1.5rem 1.6rem; }
.partner-card__name { font-family: var(--font-display); font-weight: 700; font-size: 1.4rem; }
.partner-card__role { color: var(--muted); font-size: 0.92rem; margin-top: 0.15rem; letter-spacing: 0.02em; }
.partner-card__more {
  margin-top: 0.9rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--accent);
  display: inline-flex; align-items: center; gap: 0.4rem;
}
.partner-card:hover .partner-card__more .arrow { transform: translateX(3px); }
.partner-card__more .arrow { transition: transform var(--t-fast); }

/* ---- Bio page ----------------------------------------------------- */
.bio-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: start;
}
.bio-aside { position: relative; }
.bio-aside__img {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--tint-2);
}
.bio-aside__panel {
  margin-top: 1.5rem;
  padding: 1.5rem;
  background: var(--tint);
  border-radius: var(--radius);
}
.bio-aside__panel h2 {
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.75rem;
}
.bio-meta { list-style: none; padding: 0; display: grid; gap: 0.5rem; }
.bio-meta a { color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--line-strong); padding-bottom: 1px; transition: border-color var(--t-fast); }
.bio-meta a:hover { border-color: var(--ink); }
.bio-name { margin-bottom: 0.5rem; }
.bio-role { color: var(--muted); font-family: var(--font-display); font-weight: 500; letter-spacing: 0.04em; text-transform: uppercase; font-size: 0.82rem; }
.bio-quote {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.25rem, 1rem + 1.1vw, 1.75rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  border-left: 3px solid var(--ink);
  padding-left: 1.25rem;
  margin: 1.75rem 0;
  color: var(--ink);
}
.bio-quote cite { display: block; font-style: normal; font-size: 0.95rem; color: var(--muted); margin-top: 0.75rem; font-weight: 500; }
.bio-lead { font-size: clamp(1.1rem,1rem+0.6vw,1.35rem); color: var(--ink-soft); line-height: 1.55; max-width: var(--measure); }
.prose { max-width: var(--measure); }
.prose > * + * { margin-top: 1.1rem; }
.prose p { color: var(--ink-soft); }
.prose a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--line-strong); padding-bottom: 1px; transition: border-color var(--t-fast); }
.prose a:hover { border-color: var(--accent); }
.prose h2 {
  font-size: clamp(1.3rem, 1.1rem + 1vw, 1.7rem);
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}
.prose h3 { font-size: 1.05rem; margin-top: 1.5rem; color: var(--ink); font-family: var(--font-display); }
.prose ul { padding-left: 1.1rem; color: var(--ink-soft); }
.prose li + li { margin-top: 0.6rem; }
.prose li::marker { color: var(--line-strong); }
.tag-row { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.5rem; }
.tag {
  font-size: 0.85rem;
  background: var(--tint);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
  color: var(--ink-soft);
}

/* ---- Contact ------------------------------------------------------ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.contact-img { border-radius: var(--radius); overflow: hidden; max-width: 420px; }
.contact-actions { margin-top: 2rem; display: flex; flex-wrap: wrap; gap: 0.9rem; }
.contact-detail { margin-top: 2rem; color: var(--muted); }
.contact-detail a { color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--line-strong); }
.contact-detail a:hover { border-color: var(--ink); }

/* ---- 404 ---------------------------------------------------------- */
.err { min-height: 56vh; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; }
.err__code { font-family: var(--font-display); font-weight: 700; font-size: clamp(4rem, 12vw, 8rem); line-height: 1; letter-spacing: -0.04em; }

/* ---- Footer ------------------------------------------------------- */
.site-footer {
  background: var(--ink);
  color: #cfcfca;
  padding-block: clamp(3rem, 6vw, 4.5rem);
  margin-top: clamp(3rem, 8vw, 6rem);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.25rem;
}
.footer-brand .wordmark { color: #fff; }
.site-footer .wordmark__sub { color: #b4b4ae; }
.footer-brand p { color: #b4b4ae; margin-top: 1rem; max-width: 34ch; font-size: 0.95rem; }
.footer-col h2 {
  color: #fff;
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.footer-col ul { list-style: none; padding: 0; display: grid; gap: 0.6rem; }
.footer-col a {
  color: #cfcfca;
  text-decoration: none;
  font-size: 0.95rem;
  transition: color var(--t-fast);
}
.footer-col a:hover { color: #fff; }
.site-footer :focus-visible { outline-color: #fff; }
.footer-bottom {
  margin-top: 2.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.12);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
  font-size: 0.85rem;
  color: #84847e;
}

/* ---- Reveal-on-scroll (progressive, no-CLS) ----------------------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 700ms ease, transform 700ms cubic-bezier(.2,.6,.2,1); will-change: opacity, transform; }
.reveal.is-in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

/* ===================================================================
   Responsive — tablet & up
   =================================================================== */
@media (min-width: 600px) {
  .logos__grid { grid-template-columns: repeat(4, 1fr); }
  .contact-grid { grid-template-columns: 1.1fr 0.9fr; }
}
@media (min-width: 760px) {
  .pf-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(3, 1fr); }
  .bio-grid { grid-template-columns: 320px 1fr; }
  .bio-aside { position: sticky; top: 92px; }
  .footer-grid { grid-template-columns: 1.6fr 1fr 1fr; gap: 3rem; }
}
@media (min-width: 1000px) {
  .pf-grid { grid-template-columns: repeat(3, 1fr); }
  .pf-grid--funds { grid-template-columns: repeat(2, 1fr); max-width: 760px; }
}

/* ===================================================================
   Mobile nav (under 760px)
   =================================================================== */
@media (max-width: 759px) {
  .nav-toggle { display: inline-flex; }
  .primary-nav {
    position: fixed;
    inset: 68px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 0.5rem var(--gutter) 1.25rem;
    box-shadow: 0 24px 40px -28px rgba(0,0,0,.4);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--t), transform var(--t), visibility var(--t);
  }
  .primary-nav.is-open { opacity: 1; visibility: visible; transform: none; }
  .primary-nav a { padding: 0.85rem 0; border-bottom: 1px solid var(--line); font-size: 1.05rem; }
  .primary-nav a::after { display: none; }
}

/* ===================================================================
   Reduced motion
   =================================================================== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}