/* =====================================================================
   PINION — robotics studio. Monochrome cream-on-black, minimal, restrained.
   No accent color — children (Fallback AI etc) get their own palettes.
   ===================================================================== */

:root{
  --black:    #0a0a0a;
  --bg-2:     #111110;
  --ink:      #efebde;
  --ink-2:    #c8c2af;
  --ink-3:    #807a6c;
  --ink-4:    #4a463e;
  --paper:    #ffffff;
  --paper-2:  #f5f1e8;
  --bold:     #efebde;             /* mono — accent is just bright cream */
  --line:     rgba(255,255,255,.08);
  --line-2:   rgba(255,255,255,.14);

  --sans: 'Geist', ui-sans-serif, system-ui, -apple-system, 'Helvetica Neue', sans-serif;
  --serif: 'Source Serif 4', 'Source Serif Pro', Georgia, 'Times New Roman', serif;

  --pad-x: clamp(24px, 5vw, 80px);
  --max:   1440px;
}

*,*::before,*::after{ box-sizing: border-box; }
html,body{ margin:0; padding:0; }
img,svg{ display:block; max-width:100%; }
a{ color: inherit; text-decoration: none; }
ul,ol{ list-style:none; padding:0; margin:0; }
button{ font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
::selection{ background: var(--ink); color: var(--black); }
:focus-visible{ outline: 1px solid var(--ink); outline-offset: 4px; }

html{ scroll-behavior: smooth; }
body{
  background: var(--black);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  letter-spacing: -0.005em;
  overflow-x: hidden;
}

/* ============= RIBBON ============= */
.ribbon{
  display: flex; justify-content: center; align-items: center; gap: 14px;
  background: var(--ink);
  color: var(--black);
  font-size: 13px;
  font-weight: 500;
  padding: 11px 16px;
  text-align: center;
}
.ribbon span{
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
}
.ribbon:hover span{ text-decoration: none; }

/* ============= NAV ============= */
.nav{
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 24px var(--pad-x);
  gap: 24px;
}
.nav__brand{
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 500;
  font-size: 18px;
  letter-spacing: -0.02em;
}
.nav__mark{ width: 24px; height: 24px; color: var(--ink); }
.nav__links{
  display: inline-flex; gap: 36px;
  justify-self: center;
  font-size: 14px;
  color: var(--ink);
}
.nav__links a{
  position: relative;
  padding: 4px 0;
  transition: color .2s, opacity .2s;
}
.nav__links a:hover{ opacity: .7; }
.nav__cta{
  justify-self: end;
  font-size: 14px;
  padding: 10px 18px;
  border: 1px solid var(--ink);
  transition: background .2s, color .2s;
}
.nav__cta:hover{ background: var(--ink); color: var(--black); }

@media (max-width: 760px){
  .nav{ grid-template-columns: 1fr auto; }
  .nav__links{ display: none; }
}

/* ============= HERO ============= */
.hero{
  position: relative;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  padding: clamp(48px, 9vw, 140px) var(--pad-x) clamp(48px, 9vw, 140px);
  align-items: center;
  min-height: calc(100vh - 120px);
}
.hero__copy{ max-width: 800px; }
.eyebrow{
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 28px;
}
.hero h1{
  margin: 0;
  font-family: var(--sans);
  font-weight: 400;
  font-size: clamp(48px, 7vw, 112px);
  line-height: 1.0;
  letter-spacing: -0.03em;
  color: var(--ink);
}
.hero__sub{
  margin: 32px 0 0;
  max-width: 56ch;
  font-family: var(--serif);
  font-size: clamp(18px, 1.6vw, 22px);
  line-height: 1.5;
  color: var(--ink-2);
}
.hero__sub a{
  color: var(--ink);
  border-bottom: 1px solid var(--ink-3);
  padding-bottom: 1px;
  transition: border-color .2s;
}
.hero__sub a:hover{ border-color: var(--ink); }

.hero__art{
  position: relative;
  height: 60vh;
  max-height: 640px;
  min-height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero__art .dither{
  width: 100%;
  height: 100%;
  display: block;
}

@media (max-width: 960px){
  .hero{ grid-template-columns: 1fr; min-height: 0; }
  .hero__art{ height: 50vh; min-height: 320px; order: 2; }
}

/* ============= ABOUT (white serif) ============= */
.scale{
  background: var(--paper);
  color: var(--black);
  padding: clamp(80px, 10vw, 160px) var(--pad-x);
  display: flex;
  justify-content: center;
}
.scale__copy{ max-width: 900px; }
.scale__eyebrow{
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--black);
  margin-bottom: 28px;
}
.scale__copy p{
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.18;
  letter-spacing: -0.005em;
  color: var(--black);
}

/* ============= PRODUCTS ============= */
.products{
  background: var(--black);
  color: var(--ink);
  padding: clamp(80px, 10vw, 140px) var(--pad-x);
}
.kbd{
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 32px;
}
.products ol{
  border-top: 1px solid var(--line);
}
.products li{
  border-bottom: 1px solid var(--line);
}
.products__link, .products li:not(.muted) > .products__num + *{
  /* force grid on link directly below */
}
.products li{
  display: block;
}
.products__link, .products li.muted{
  display: grid;
  grid-template-columns: 60px 1fr auto;
  gap: 32px;
  align-items: baseline;
  padding: 32px 0;
  transition: padding-left .25s;
}
.products__link:hover{ padding-left: 12px; }
.products__num{
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--ink-3);
}
.products__main{
  display: grid;
  gap: 8px;
}
.products__name{
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(28px, 3vw, 44px);
  line-height: 1.05;
  color: var(--ink);
  letter-spacing: -0.015em;
}
.products__sub{
  font-family: var(--sans);
  font-size: 16px;
  color: var(--ink-2);
  line-height: 1.5;
}
.products__cta{
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-3);
  align-self: center;
  white-space: nowrap;
}
.products__link:hover .products__cta{ color: var(--ink); }
.products li.muted .products__name{ color: var(--ink-3); }
.products li.muted .products__sub{ color: var(--ink-4); }
.products li.muted .products__cta{ color: var(--ink-4); }

@media (max-width: 720px){
  .products__link, .products li.muted{ grid-template-columns: 40px 1fr; gap: 16px; }
  .products__cta{ grid-column: 2; padding-top: 4px; }
}

/* ============= THESIS ============= */
.thesis{
  background: var(--black);
  color: var(--ink);
  padding: clamp(60px, 8vw, 120px) var(--pad-x) clamp(80px, 10vw, 140px);
}
.ladder{
  border-top: 1px solid var(--line);
  max-width: 880px;
}
.ladder li{
  border-bottom: 1px solid var(--line);
}
.ladder summary{
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 24px;
  padding: 26px 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
  position: relative;
}
.ladder summary::-webkit-details-marker{ display: none; }
.ladder summary::after{
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-weight: 400;
  font-size: 22px;
  line-height: 1;
  color: var(--ink-3);
}
.ladder details[open] summary::after{ content: "−"; }
.ladder__num{
  font-family: var(--sans);
  font-weight: 400;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-3);
}
.ladder__lbl{ font-weight: 600; color: var(--ink); }
.ladder__body{
  padding: 4px 0 32px;
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 24px;
}
.ladder__body p{
  grid-column: 2;
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(18px, 1.5vw, 22px);
  line-height: 1.45;
  color: var(--ink-2);
  max-width: 56ch;
}

/* ============= CONTACT ============= */
.contact{
  background: var(--black);
  color: var(--ink);
  padding: clamp(80px, 14vw, 200px) var(--pad-x);
  display: flex;
  justify-content: center;
}
.contact__inner{
  text-align: center;
  max-width: 900px;
}
.contact h2{
  margin: 0 0 40px;
  font-family: var(--sans);
  font-weight: 400;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--ink);
}
.contact__btn{
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 16px;
  font-weight: 400;
  padding: 16px 24px;
  border: 1px solid var(--ink);
  color: var(--ink);
  transition: background .2s, color .2s;
}
.contact__btn svg{ width: 16px; height: 16px; transition: transform .25s; }
.contact__btn:hover{ background: var(--ink); color: var(--black); }
.contact__btn:hover svg{ transform: translateX(4px); }

/* ============= FOOTER ============= */
.footer{
  background: var(--black);
  color: var(--ink-3);
  padding: 32px var(--pad-x);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  border-top: 1px solid var(--line);
  font-size: 13px;
}
.footer > div:first-child{
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--ink);
  font-weight: 500;
  font-size: 16px;
  letter-spacing: -0.02em;
}
.footer__mark{ width: 22px; height: 22px; color: var(--ink); }
.footer__cols{
  display: inline-flex;
  gap: 28px;
  justify-self: center;
}
.footer__cols a{ transition: color .2s; }
.footer__cols a:hover{ color: var(--ink); }
.footer__btm{ justify-self: end; }

@media (max-width: 720px){
  .footer{ grid-template-columns: 1fr; text-align: center; }
  .footer__cols{ justify-self: center; flex-wrap: wrap; justify-content: center; }
  .footer__btm{ justify-self: center; }
}

@media (prefers-reduced-motion: reduce){
  *, *::before, *::after{
    animation-duration: 0.001s !important;
    transition-duration: 0.001s !important;
  }
}