/* ==========================================================================
   GS Partners — Flint design system
   Ink / cool paper / plum. Libre Caslon Display + Public Sans + IBM Plex Mono.
   ========================================================================== */

:root{
  /* neutrals */
  --ink-950:#15161c;
  --ink-900:#1c1d24;
  --ink-700:#383a44;
  --grey-500:#6d6e78;
  --grey-400:#8d8e97;
  --grey-300:#b1b2ba;
  --grey-200:#d6d6db;
  --grey-100:#ececee;
  --paper-50:#f1f1f3;
  --paper-0:#ffffff;

  /* accent — plum */
  --plum-900:#3a2a42;
  --plum-700:#543d5c;
  --plum-500:#6a4f74;
  --plum-400:#9c85a5;
  --plum-300:#c6aecf;
  --plum-100:#efe8f2;

  /* semantic */
  --success:#3f7d5c;
  --warning:#a8763a;
  --error:#a4433f;

  /* page tokens (light, primary) */
  --bg:var(--paper-50);
  --surface:var(--paper-0);
  --text:var(--ink-950);
  --text-muted:var(--grey-500);
  --border:var(--grey-200);
  --accent:var(--plum-500);
  --accent-hover:var(--plum-700);
  --accent-subtle:var(--plum-100);
  --accent-on:var(--paper-0);

  --maxw:1120px;
}

*, *::before, *::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:'Public Sans', ui-sans-serif, system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing:antialiased;
  line-height:1.5;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
h1,h2,h3,h4{
  font-family:'Libre Caslon Display', Georgia, serif;
  font-weight:400;
  line-height:1.14;
  margin:0;
  text-wrap:balance;
}
p{ margin:0; }
.container{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 28px;
}
.eyebrow{
  font-family:'IBM Plex Mono', ui-monospace, monospace;
  font-size:11px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--text-muted);
  margin:0 0 14px;
}
.eyebrow.on-ink{ color:var(--plum-300); }

/* ---------------------------------- header ------------------------------ */
header.site{
  position:sticky;
  top:0;
  z-index:40;
  background:rgba(241,241,243,0.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--border);
}
.nav{
  max-width:var(--maxw);
  margin:0 auto;
  padding:18px 28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.wordmark{
  font-family:'Libre Caslon Display', Georgia, serif;
  font-size:19px;
  letter-spacing:0.01em;
}
.wordmark span{ color:var(--accent); }
.nav-links{
  display:flex;
  align-items:center;
  gap:32px;
  list-style:none;
  margin:0;
  padding:0;
}
.nav-links a{
  font-size:13.5px;
  color:var(--text);
  padding:6px 0;
  border-bottom:1px solid transparent;
}
.nav-links a:hover, .nav-links a.active{
  border-bottom-color:var(--accent);
}
.nav-cta{
  font-family:'IBM Plex Mono', monospace;
  font-size:11px;
  letter-spacing:0.06em;
  text-transform:uppercase;
  background:var(--accent);
  color:var(--accent-on);
  padding:10px 16px;
  border-radius:6px;
  white-space:nowrap;
}
.nav-cta:hover{ background:var(--accent-hover); }
.nav-toggle{
  display:none;
  background:none;
  border:none;
  cursor:pointer;
  padding:6px;
}
.nav-toggle span{
  display:block;
  width:22px;
  height:2px;
  background:var(--text);
  margin:5px 0;
}
.nav-mobile{ display:none; }

@media (max-width:860px){
  .nav-links{ display:none; }
  .nav-cta.desktop-only{ display:none; }
  .nav-toggle{ display:block; }
  .nav-mobile{
    display:none;
    flex-direction:column;
    gap:2px;
    padding:0 28px 20px;
    border-bottom:1px solid var(--border);
    background:var(--bg);
  }
  .nav-mobile.open{ display:flex; }
  .nav-mobile a{
    padding:12px 0;
    font-size:14px;
    border-bottom:1px solid var(--border);
  }
  .nav-mobile a:last-child{ border-bottom:none; }
}

/* ---------------------------------- buttons ------------------------------ */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:'IBM Plex Mono', monospace;
  font-size:12px;
  letter-spacing:0.05em;
  text-transform:uppercase;
  font-weight:500;
  padding:13px 22px;
  border-radius:7px;
  border:1px solid transparent;
  cursor:pointer;
}
.btn-primary{ background:var(--accent); color:var(--accent-on); }
.btn-primary:hover{ background:var(--accent-hover); }
.btn-ghost{ border-color:var(--border); color:var(--text); }
.btn-ghost:hover{ border-color:var(--accent); color:var(--accent); }
.btn-on-ink{ background:var(--plum-300); color:var(--plum-900); }
.btn-on-ink:hover{ background:var(--paper-0); }
.btn-ghost-on-ink{ border-color:var(--ink-700); color:var(--paper-50); }
.btn-ghost-on-ink:hover{ border-color:var(--plum-300); color:var(--plum-300); }

/* ---------------------------------- sections ------------------------------ */
section{ padding:88px 0; }
section.tight{ padding:64px 0; }
.band-ink{ background:var(--ink-950); color:var(--paper-50); }
.band-ink .text-muted{ color:var(--grey-400); }
.band-ink h2, .band-ink h3{ color:var(--paper-50); }

.section-head{
  max-width:640px;
  margin-bottom:48px;
}
.section-head h2{ font-size:clamp(1.6rem, 3vw, 2.1rem); margin-bottom:14px; }
.section-head p{ color:var(--text-muted); font-size:1rem; line-height:1.6; }
.band-ink .section-head p{ color:var(--grey-400); }

.text-muted{ color:var(--text-muted); }
.hr{ height:1px; background:var(--border); border:none; margin:0; }

/* ---------------------------------- hero ------------------------------ */
.hero{
  padding:96px 0 80px;
}
.hero h1{
  font-size:clamp(2.4rem, 5.4vw, 3.6rem);
  max-width:15ch;
  margin-bottom:24px;
}
.hero .lede{
  font-size:1.12rem;
  line-height:1.65;
  color:var(--text-muted);
  max-width:56ch;
  margin-bottom:34px;
}
.hero-actions{ display:flex; gap:14px; flex-wrap:wrap; }

/* ---------------------------------- cards ------------------------------ */
.grid{ display:grid; gap:22px; }
.grid-3{ grid-template-columns:repeat(3, 1fr); }
.grid-2{ grid-template-columns:repeat(2, 1fr); }
@media (max-width:860px){
  .grid-3, .grid-2{ grid-template-columns:1fr; }
}

.card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:12px;
  padding:28px;
}
.card h3{ font-size:1.15rem; margin-bottom:10px; }
.card p{ color:var(--text-muted); font-size:0.94rem; line-height:1.6; }

.step-num{
  font-family:'IBM Plex Mono', monospace;
  font-size:12px;
  color:var(--accent);
  letter-spacing:0.06em;
  margin-bottom:16px;
}

/* article / insight card */
.article-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:12px;
  overflow:hidden;
  display:flex;
  flex-direction:column;
}
.article-card .thumb{
  height:140px;
  background:linear-gradient(135deg, var(--ink-950), var(--plum-700));
  position:relative;
}
.article-card .thumb .tag{
  position:absolute;
  bottom:12px; left:14px;
  font-family:'IBM Plex Mono', monospace;
  font-size:10px;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--plum-100);
}
.article-card .body{ padding:22px 22px 24px; flex:1; display:flex; flex-direction:column; }
.article-card .meta{
  font-family:'IBM Plex Mono', monospace;
  font-size:10.5px;
  color:var(--text-muted);
  letter-spacing:0.04em;
  text-transform:uppercase;
  margin-bottom:10px;
}
.article-card h3{ font-size:1.1rem; margin-bottom:10px; }
.article-card p{ color:var(--text-muted); font-size:0.9rem; line-height:1.55; flex:1; }
.article-card .read{
  margin-top:16px;
  font-family:'IBM Plex Mono', monospace;
  font-size:11px;
  letter-spacing:0.05em;
  text-transform:uppercase;
  color:var(--accent);
}
.article-card.pending{ opacity:0.55; }
.article-card.pending .thumb{ background:var(--grey-200); }

/* experience card */
.exp-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:12px;
  padding:26px;
  display:flex;
  flex-direction:column;
}
.exp-card-top{ min-height:96px; }
.exp-card .client{
  font-family:'IBM Plex Mono', monospace;
  font-size:11px;
  letter-spacing:0.06em;
  text-transform:uppercase;
  color:var(--accent);
  margin-bottom:10px;
}
.exp-card h3{ font-size:1.2rem; margin-bottom:12px; }
.exp-card .row{ display:flex; gap:10px; font-size:0.9rem; line-height:1.55; }
.exp-card .row b{ min-width:88px; flex:none; font-weight:600; }
.exp-card .row span{ color:var(--text-muted); }
.exp-divider{
  border:none;
  border-top:1px solid var(--border);
  margin:18px 0;
}
.exp-card > p{ color:var(--text-muted); font-size:0.9rem; line-height:1.6; }

/* founder card */
.founder-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:12px;
  overflow:hidden;
}
.founder-banner{
  height:110px;
  background:linear-gradient(135deg, var(--ink-950), var(--plum-700));
  position:relative;
}
.founder-photo{
  width:96px;
  height:96px;
  border-radius:50%;
  object-fit:cover;
  border:4px solid var(--surface);
  position:absolute;
  left:32px;
  bottom:-48px;
  background:var(--ink-950);
}
.founder-body{
  padding:64px 32px 32px;
}

/* tag pill */
.pill{
  display:inline-block;
  font-family:'IBM Plex Mono', monospace;
  font-size:10px;
  letter-spacing:0.05em;
  text-transform:uppercase;
  background:var(--accent-subtle);
  color:var(--plum-700);
  padding:5px 10px;
  border-radius:100px;
}
.band-ink .pill{ background:var(--ink-900); color:var(--plum-300); }

/* stat row */
.stats{ display:flex; gap:44px; flex-wrap:wrap; }
.stat .num{
  font-family:'IBM Plex Mono', monospace;
  font-size:2rem;
  font-variant-numeric:tabular-nums;
  color:var(--accent);
}
.band-ink .stat .num{ color:var(--plum-300); }
.stat .lbl{
  font-size:0.82rem;
  color:var(--text-muted);
  max-width:20ch;
  margin-top:4px;
}

/* CTA band */
.cta-band{
  border-radius:16px;
  padding:56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
}
.cta-band h2{ font-size:1.7rem; max-width:16ch; }

/* forms */
label{
  display:block;
  font-family:'IBM Plex Mono', monospace;
  font-size:11px;
  letter-spacing:0.05em;
  text-transform:uppercase;
  color:var(--text-muted);
  margin-bottom:8px;
}
input, textarea{
  width:100%;
  font-family:'Public Sans', sans-serif;
  font-size:0.95rem;
  padding:12px 14px;
  border:1px solid var(--border);
  border-radius:8px;
  background:var(--surface);
  color:var(--text);
}
input:focus, textarea:focus{
  outline:2px solid var(--accent);
  outline-offset:1px;
}
input.invalid, textarea.invalid{
  border-color:var(--error);
}
input.invalid:focus, textarea.invalid:focus{
  outline-color:var(--error);
}
.field{ margin-bottom:20px; }
.field-error{
  display:block;
  font-family:'IBM Plex Mono', monospace;
  font-size:11px;
  color:var(--error);
  margin-top:6px;
}
.form-status{
  display:none;
  margin-top:16px;
  font-size:0.9rem;
  line-height:1.5;
}
.form-status.success{ display:block; color:var(--success); }
.form-status.error{ display:block; color:var(--error); }

/* footer */
footer.site{
  background:var(--ink-950);
  color:var(--grey-400);
  padding:64px 0 32px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:32px;
  padding-bottom:40px;
  border-bottom:1px solid var(--ink-700);
}
@media (max-width:720px){
  .footer-grid{ grid-template-columns:1fr 1fr; }
}
.footer-grid .wordmark{ color:var(--paper-50); margin-bottom:12px; }
.footer-grid p{ font-size:0.86rem; line-height:1.6; max-width:32ch; }
.footer-col h4{
  font-family:'IBM Plex Mono', monospace;
  font-size:10.5px;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--grey-300);
  margin-bottom:14px;
}
.footer-col a{
  display:block;
  font-size:0.88rem;
  color:var(--grey-400);
  margin-bottom:10px;
}
.footer-col a:hover{ color:var(--plum-300); }
.footer-bottom{
  padding-top:24px;
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:12px;
  font-size:0.78rem;
  color:var(--grey-500);
  font-family:'IBM Plex Mono', monospace;
}

/* utility */
.mt-0{ margin-top:0; }
.flow > * + *{ margin-top:18px; }