/* ============================================================
   THE STARTUP PARTNER — design system (monochrome)
   Identity: drawn from the logo — words reversed out of a solid
   black box. That block is now the headline highlight device.
   Type: Archivo (display, engineered/wide) · Hanken Grotesk (body)
         · Space Mono (annotation / data marks)
   ============================================================ */

:root {
  --paper:      #F2F0EA;   /* warm off-white */
  --paper-2:    #E7E4DB;   /* deeper paper for blocks */
  --ink:        #14120E;   /* near-black, matches logo */
  --ink-2:      #2A2722;   /* raised ink surface */
  --muted:      #6B665C;   /* secondary text on paper */
  --muted-d:    #A7A192;   /* secondary text on ink */
  --line:       #D4D0C5;   /* hairlines on paper */
  --line-dark:  #38342C;   /* hairlines on ink */

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

  --f-display: "Archivo", system-ui, sans-serif;
  --f-body: "Hanken Grotesk", system-ui, sans-serif;
  --f-mono: "Space Mono", ui-monospace, monospace;

  --t-eyebrow: clamp(0.7rem, 0.66rem + 0.2vw, 0.8rem);
  --t-body:    clamp(1rem, 0.96rem + 0.2vw, 1.125rem);
  --t-lead:    clamp(1.2rem, 1.05rem + 0.8vw, 1.6rem);
  --t-h3:      clamp(1.3rem, 1.1rem + 1vw, 1.9rem);
  --t-h2:      clamp(1.9rem, 1.3rem + 3vw, 3.4rem);
  --t-h1:      clamp(2.6rem, 1.2rem + 6.4vw, 6.2rem);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--f-body);
  font-size: var(--t-body);
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

::selection { background: var(--ink); color: var(--paper); }

/* ---------- layout helpers ---------- */
.wrap { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: clamp(64px, 9vw, 140px); }
.section--tight { padding-block: clamp(48px, 6vw, 90px); }

.eyebrow {
  font-family: var(--f-mono);
  font-size: var(--t-eyebrow);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
}
.eyebrow::before { content: ""; width: 26px; height: 1px; background: var(--ink); display: inline-block; }
.eyebrow--signal::before { background: var(--ink); width: 26px; height: 3px; }

/* ---------- display type ---------- */
h1, h2, h3 { font-family: var(--f-display); font-weight: 800; line-height: 1.02; letter-spacing: -0.02em; }
.display-xl {
  font-size: var(--t-h1);
  font-weight: 900;
  font-stretch: 125%;
  line-height: 0.98;
  letter-spacing: -0.025em;
  text-transform: uppercase;
  overflow-wrap: normal;
  word-break: normal;
}
@media (max-width: 560px) {
  .display-xl { font-stretch: 100%; font-size: clamp(1.9rem, 1rem + 7vw, 3rem); letter-spacing: -0.02em; line-height: 1.0; }
  .h2 { font-stretch: 100%; }
}
.h2 { font-size: var(--t-h2); font-stretch: 112%; text-transform: uppercase; letter-spacing: -0.02em; }
.lead { font-size: var(--t-lead); line-height: 1.4; color: var(--ink); max-width: 34ch; }
.muted { color: var(--muted); }

/* ---- the signature: word reversed out of a solid black box (from the logo) ---- */
.mark {
  background: var(--ink);
  color: var(--paper);
  padding: 0.02em 0.26em;
  margin-inline: -0.02em;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}
/* inverted box for use on dark surfaces (paper box, ink text) */
.mark--invert { background: var(--paper); color: var(--ink); }
.site-foot .mark, .work .mark, .on-dark .mark { background: var(--paper); color: var(--ink); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--f-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 1.05em 1.5em;
  border: 1.5px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  border-radius: 0;
  transition: transform .18s ease, background .18s ease, color .18s ease;
}
.btn .arr { transition: transform .22s ease; }
.btn:hover { background: var(--paper); color: var(--ink); border-color: var(--ink); }
.btn:hover .arr { transform: translateX(4px); }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--paper); }
.btn--on-ink { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.btn--on-ink:hover { background: transparent; color: var(--paper); border-color: var(--paper); }
.btn--ghost-on-ink { background: transparent; color: var(--paper); border-color: var(--line-dark); }
.btn--ghost-on-ink:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 3px;
}
.site-foot a:focus-visible, .work a:focus-visible, .proof a:focus-visible { outline-color: var(--paper); }

/* ============================================================
   HEADER / NAV
   ============================================================ */
.site-head {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 76px; padding-block: 10px; }
.brand { display: inline-flex; align-items: center; }
.brand-logo { height: 50px; width: auto; }
@media (max-width: 560px) { .brand-logo { height: 42px; } }
.nav-links { display: flex; align-items: center; gap: clamp(14px, 2vw, 30px); }
.nav-links a {
  font-family: var(--f-mono);
  font-size: 0.78rem; letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--muted); position: relative; padding-block: 4px;
  transition: color .15s ease;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); }
.nav-links a[aria-current="page"]::after { content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 3px; background: var(--ink); }
.nav-cta { padding: 0.7em 1.1em; }
.nav-links a.nav-cta[aria-current="page"] { color: var(--paper); }
.nav-links a.nav-cta[aria-current="page"]::after { display: none; }
.nav-toggle { display: none; border: 1.5px solid var(--ink); background: transparent; padding: 8px 12px; font-family: var(--f-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; }

@media (max-width: 860px) {
  .nav-links {
    position: fixed; inset: 76px 0 auto 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    padding: 8px var(--gutter) 20px;
    transform: translateY(-130%); transition: transform .28s ease; pointer-events: none;
  }
  .nav-links.open { transform: translateY(0); pointer-events: auto; }
  .nav-links a { width: 100%; padding: 14px 0; font-size: 0.92rem; border-bottom: 1px solid var(--line); }
  .nav-links a[aria-current="page"]::after { display: none; }
  .nav-links .nav-cta { background: var(--ink); color: var(--paper); margin-top: 14px; border:none; width: max-content; padding: 0.9em 1.3em; }
  .nav-toggle { display: inline-block; }
}

/* ============================================================
   HERO
   ============================================================ */
.hero { position: relative; padding-top: clamp(48px, 8vw, 96px); padding-bottom: 0; }
.hero .eyebrow { margin-bottom: clamp(24px, 4vw, 40px); }
.hero h1 { margin-bottom: clamp(26px, 3.5vw, 40px); }
.hero-line { display: block; overflow: hidden; padding-block: 0.05em; }
.hero-line > span { display: block; transform: translateY(110%); }
.is-in .hero-line > span { transform: translateY(0); transition: transform .8s cubic-bezier(.2,.75,.2,1); }
.is-in .hero-line:nth-child(2) > span { transition-delay: .08s; }
.is-in .hero-line:nth-child(3) > span { transition-delay: .16s; }
.hero-lead-row { display: grid; grid-template-columns: 1fr; gap: clamp(24px,4vw,48px); align-items: end; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 8px; }
@media (min-width: 880px) { .hero-lead-row { grid-template-columns: 1.1fr 0.9fr; } }

/* proof strip */
.proof { background: var(--ink); color: var(--paper); margin-top: clamp(48px, 7vw, 90px); }
.proof-inner { display: grid; grid-template-columns: repeat(4, 1fr); border-left: 1px solid var(--line-dark); }
.proof-cell { padding: clamp(28px,4vw,52px) clamp(18px,2.4vw,32px); border-right: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.proof-num { font-family: var(--f-display); font-weight: 900; font-stretch: 112%; font-size: clamp(2rem, 1rem + 4vw, 3.6rem); line-height: 1; letter-spacing: -0.03em; color: var(--paper); }
.proof-label { font-family: var(--f-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted-d); margin-top: 14px; }
@media (max-width: 720px) { .proof-inner { grid-template-columns: repeat(2, 1fr); } }

/* ============================================================
   "WHAT WE DO" — track rows
   ============================================================ */
.section-head { display: grid; gap: 20px; margin-bottom: clamp(36px,5vw,64px); }
@media (min-width: 880px) { .section-head { grid-template-columns: 0.8fr 1.2fr; align-items: end; } }

.tracks { border-top: 1px solid var(--line); }
.track {
  display: grid; grid-template-columns: auto 1fr auto; gap: clamp(16px,3vw,48px);
  align-items: baseline; padding: clamp(26px,3.5vw,46px) 0;
  border-bottom: 1px solid var(--line);
  position: relative; transition: padding-left .3s ease;
}
.track:hover { padding-left: 14px; }
.track::before { content: ""; position: absolute; left: -14px; top: 0; bottom: 0; width: 5px; background: var(--ink); transform: scaleY(0); transform-origin: top; transition: transform .3s ease; }
.track:hover::before { transform: scaleY(1); }
.track-no { font-family: var(--f-mono); font-size: 0.85rem; color: var(--muted); padding-top: 0.4em; }
.track-body h3 { font-size: var(--t-h3); text-transform: uppercase; font-stretch: 110%; margin-bottom: 10px; }
.track-body p { color: var(--muted); max-width: 52ch; }
.track-go { font-family: var(--f-mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; white-space: nowrap; display: inline-flex; gap: 0.5em; align-items: center; align-self: center; }
.track-go .arr { transition: transform .22s ease; }
.track:hover .track-go .arr { transform: translateX(5px); }
@media (max-width: 720px) {
  .track { grid-template-columns: auto 1fr; }
  .track-go { grid-column: 2; align-self: start; margin-top: 8px; }
}

/* ============================================================
   PILLARS
   ============================================================ */
.pillars { display: grid; gap: clamp(28px,4vw,40px); grid-template-columns: 1fr; }
@media (min-width: 760px) { .pillars { grid-template-columns: repeat(3, 1fr); } }
.pillar { border-top: 3px solid var(--ink); padding-top: 22px; }
.pillar .pillar-k { font-family: var(--f-mono); font-size: 0.75rem; color: var(--muted); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 16px; }
.pillar h3 { font-size: var(--t-h3); margin-bottom: 12px; text-transform: uppercase; font-stretch: 108%; }
.pillar p { color: var(--muted); }

/* ============================================================
   SELECTED WORK (dark)
   ============================================================ */
.work { background: var(--ink); color: var(--paper); }
.work .eyebrow { color: var(--muted-d); }
.work .eyebrow::before { background: var(--paper); }
.work .h2 { color: var(--paper); }
.cases { margin-top: clamp(40px,5vw,64px); border-top: 1px solid var(--line-dark); }
.case { display: grid; gap: clamp(16px,3vw,56px); grid-template-columns: 1fr; padding: clamp(34px,4.5vw,60px) 0; border-bottom: 1px solid var(--line-dark); }
@media (min-width: 880px) { .case { grid-template-columns: 0.9fr 1.1fr; } }
.case-name { font-family: var(--f-display); font-weight: 900; font-stretch: 115%; text-transform: uppercase; font-size: clamp(1.6rem, 1rem + 2.4vw, 2.8rem); line-height: 1; letter-spacing: -0.02em; }
.case-tag { font-family: var(--f-mono); font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted-d); margin-bottom: 18px; }
.case-body p { color: #cfc9bb; max-width: 56ch; }
.case-metrics { display: flex; flex-wrap: wrap; gap: 28px 40px; margin-top: 26px; }
.case-metric .m-num { font-family: var(--f-display); font-weight: 900; font-stretch: 110%; font-size: clamp(1.5rem,1rem+2vw,2.4rem); line-height: 1; color: var(--paper); letter-spacing: -0.02em; }
.case-metric .m-label { font-family: var(--f-mono); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted-d); margin-top: 10px; max-width: 22ch; }

/* ============================================================
   CTA band (light, to break up the dark sections around it)
   ============================================================ */
.cta-band { background: var(--paper-2); border-block: 1px solid var(--line); }
.cta-band .wrap { display: grid; gap: 28px; align-items: center; }
@media (min-width: 820px) { .cta-band .wrap { grid-template-columns: 1.4fr auto; } }
.cta-band h2 { color: var(--ink); font-size: var(--t-h2); text-transform: uppercase; font-stretch: 110%; }
.cta-band .btn { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.cta-band .btn:hover { background: transparent; color: var(--ink); }

/* ============================================================
   GENERIC PAGE BLOCKS (sub-pages)
   ============================================================ */
.page-hero { padding-top: clamp(40px,6vw,80px); padding-bottom: clamp(40px,5vw,70px); border-bottom: 1px solid var(--line); }
.page-hero h1 { margin-block: clamp(20px,3vw,30px) clamp(20px,3vw,28px); }
.page-hero .lead { max-width: 46ch; color: var(--muted); }

.prose-grid { display: grid; gap: clamp(32px,5vw,72px); grid-template-columns: 1fr; }
@media (min-width: 900px) { .prose-grid { grid-template-columns: 0.7fr 1.3fr; align-items: start; } }
.prose-grid .sticky-label { position: sticky; top: 100px; }
.prose h2 { font-size: var(--t-h3); text-transform: uppercase; font-stretch: 106%; margin-bottom: 18px; letter-spacing: -0.015em; }
.prose h2 + p { margin-bottom: 22px; }
.prose p { margin-bottom: 18px; max-width: 64ch; color: var(--ink); }
.prose p.muted { color: var(--muted); }
.prose + .prose { margin-top: clamp(40px,5vw,64px); }

/* checklist */
.ticks { list-style: none; padding: 0; display: grid; gap: 14px; margin-top: 6px; max-width: 64ch; }
.ticks li { position: relative; padding-left: 36px; }
.ticks li::before {
  content: ""; position: absolute; left: 0; top: 0.2em; width: 18px; height: 18px;
  background: var(--ink);
  clip-path: polygon(14% 44%, 0 58%, 40% 100%, 100% 16%, 86% 0, 40% 72%);
}

/* feature case (sub-page, on paper) */
.feature-case { background: var(--paper-2); border: 1px solid var(--line); padding: clamp(28px,4vw,48px); }
.feature-case .case-tag { color: var(--muted); }
.feature-case .case-name { margin-bottom: 18px; color: var(--ink); }
.feature-case p { color: var(--ink); max-width: 64ch; }
.feature-case .case-metrics { gap: 24px 36px; }
.feature-case .m-num { color: var(--ink); }
.feature-case .m-label { color: var(--muted); }

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid { display: grid; gap: clamp(36px,5vw,72px); grid-template-columns: 1fr; }
@media (min-width: 900px) { .contact-grid { grid-template-columns: 1fr 1fr; } }
.field { display: grid; gap: 8px; margin-bottom: 22px; }
.field label { font-family: var(--f-mono); font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.field input, .field textarea {
  font: inherit; font-size: 1rem; color: var(--ink);
  background: var(--paper); border: 1.5px solid var(--line); border-radius: 0;
  padding: 0.85em 1em; transition: border-color .15s ease;
}
.field input:focus, .field textarea:focus { border-color: var(--ink); outline-offset: 2px; }
.field textarea { resize: vertical; min-height: 140px; }
.contact-detail { margin-bottom: 30px; }
.contact-detail .k { font-family: var(--f-mono); font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 8px; }
.contact-detail .v { font-size: var(--t-lead); font-family: var(--f-display); font-weight: 700; }
.contact-detail a.v:hover { color: var(--muted); }
.hp { position: absolute; left: -9999px; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-foot { background: var(--ink); color: var(--paper); padding-block: clamp(48px,6vw,80px) 36px; }
.foot-top { display: grid; gap: 36px; grid-template-columns: 1fr; }
@media (min-width: 760px) { .foot-top { grid-template-columns: 1.4fr 1fr 1fr; } }
.foot-logo { height: 64px; width: auto; margin-bottom: 22px; }
.foot-tagline { font-family: var(--f-display); font-weight: 800; font-stretch: 108%; text-transform: uppercase; font-size: clamp(1.1rem,1rem+0.8vw,1.5rem); letter-spacing: -0.015em; line-height: 1.12; max-width: 18ch; color: var(--paper); }
.foot-col h4 { font-family: var(--f-mono); font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted-d); margin-bottom: 16px; font-weight: 400; }
.foot-col a { display: block; padding: 5px 0; color: var(--paper); opacity: .82; transition: opacity .15s ease; }
.foot-col a:hover { opacity: 1; text-decoration: underline; text-underline-offset: 3px; }
.foot-bottom { display: flex; flex-wrap: wrap; gap: 12px 24px; justify-content: space-between; align-items: center; margin-top: clamp(40px,5vw,64px); padding-top: 24px; border-top: 1px solid var(--line-dark); font-family: var(--f-mono); font-size: 0.72rem; color: var(--muted-d); text-transform: uppercase; letter-spacing: 0.05em; }

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.is-in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }
@media (prefers-reduced-motion: reduce) {
  .reveal, .hero-line > span { opacity: 1 !important; transform: none !important; transition: none !important; }
}