/* ============================================================
   Collinear benchmark - landing page
   Built on the Collinear AI design system (Archivo display, Inter
   body, Geist Mono; orange #F26125 on warm beige). Archivo served
   locally; Inter + Geist Mono via Google Fonts.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Geist+Mono:wght@400;500&display=swap');

@font-face { font-family: 'Archivo'; font-style: normal; font-weight: 300; font-display: swap; src: url('fonts/Archivo-Light.ttf')    format('truetype'); }
@font-face { font-family: 'Archivo'; font-style: normal; font-weight: 400; font-display: swap; src: url('fonts/Archivo-Regular.ttf')  format('truetype'); }
@font-face { font-family: 'Archivo'; font-style: normal; font-weight: 500; font-display: swap; src: url('fonts/Archivo-Medium.ttf')   format('truetype'); }
@font-face { font-family: 'Archivo'; font-style: normal; font-weight: 600; font-display: swap; src: url('fonts/Archivo-SemiBold.ttf') format('truetype'); }

:root {
  --font-display: 'Archivo', 'Inter', -apple-system, system-ui, sans-serif;
  --font-body:    'Inter', -apple-system, system-ui, sans-serif;
  --font-mono:    'Geist Mono', ui-monospace, monospace;

  --c-brand-orange:        #F26125;
  --c-brand-orange-bright: #EE8449;
  --c-brand-orange-tint:   #FFE4D6;
  --c-tan:                 #CBB9A1;  /* neutral series colour (pass@1) */

  --c-beige-100: #FBFAF8;
  --c-beige-200: #F8F7F2;  /* page bg */
  --c-beige-300: #F2EEE5;

  --c-ink-900: #171616;
  --c-ink-700: #4E4F4F;
  --c-ink-600: #747575;
  --c-ink-300: #E5E5E1;
  --c-ink-200: #ECEAE3;

  --bg:      var(--c-beige-200);
  --fg-1:    var(--c-ink-900);
  --fg-2:    var(--c-ink-700);
  --fg-3:    var(--c-ink-600);
  --border:  var(--c-ink-300);
  --accent:  var(--c-brand-orange);

  --r-md:   8px;
  --r-pill: 999px;

  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  max-width: 100%;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--fg-1);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--c-brand-orange-tint); color: var(--c-ink-900); }

a { color: inherit; }

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Generative ambient canvas - sits behind all content on the beige page */
#ambient {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
}

/* Keep all real content above the simulation */
header,
main,
.footer { position: relative; z-index: 1; }

/* ---------- Shell ---------- */
.shell {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 32px;
  gap: 16px;
}
.topbar .wordmark { color: var(--fg-1); height: 26px; display: block; }
.topbar .wordmark svg { height: 100%; width: auto; }

.toplinks { display: flex; align-items: center; gap: 28px; }
.toplink {
  font: 500 14px/1 var(--font-body);
  letter-spacing: -0.01em;
  color: var(--fg-2);
  text-decoration: none;
  transition: color var(--ease-standard) 150ms;
}
.toplink:hover { color: var(--accent); }

/* ---------- Hero + content ---------- */
main {
  flex: 1 0 auto;
  display: grid;
  grid-template-columns: minmax(300px, 360px) minmax(0, 1fr);
  align-content: center;   /* vertically centre the row in the viewport */
  align-items: center;     /* centre hero and chart relative to each other */
  column-gap: 60px;
  row-gap: 40px;
  padding: 48px 0;
}
.hero { max-width: none; }

@media (max-width: 920px) {
  main {
    grid-template-columns: 1fr;
    align-content: start;
    padding: 40px 0 72px;
  }
  .hero { max-width: 640px; }
}

.eyebrow {
  display: inline-block;
  font: 500 12px/1 var(--font-body);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--c-brand-orange-tint);
  padding: 7px 12px;
  border-radius: var(--r-pill);
}

.product {
  margin: 24px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(40px, 7vw, 80px);
  line-height: 0.96;
  letter-spacing: -0.04em;
  color: var(--fg-1);
}

.lede {
  margin: 20px 0 0;
  max-width: 580px;
  font: 400 16px/1.5 var(--font-body);
  letter-spacing: -0.01em;
  color: var(--fg-2);
}

.meta {
  margin: 32px 0 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  font: 400 13px/1 var(--font-mono);
  letter-spacing: 0;
  color: var(--fg-3);
}
.meta .sep { color: var(--border); }
.meta a {
  color: var(--fg-3);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1px;
  transition: color var(--ease-standard) 150ms, border-color var(--ease-standard) 150ms;
}
.meta a:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- Results chart ---------- */
.results { width: 100%; min-width: 0; }
.results-head { max-width: none; }
.results-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(18px, 2.3vw, 27px);
  line-height: 1.12;
  letter-spacing: -0.025em;
  color: var(--fg-1);
}
.results-sub {
  margin: 10px 0 0;
  font: 400 15px/1.5 var(--font-body);
  letter-spacing: -0.01em;
  color: var(--fg-2);
}

.chart { margin: 22px 0 0; }
.chart svg { display: block; width: 100%; height: auto; }

.chart .grid { stroke: var(--border); stroke-width: 1; }
.chart .axis-zero { stroke: var(--c-ink-600); stroke-width: 1; }
.chart .y-num { fill: var(--fg-3); font: 400 14px/1 var(--font-mono); text-anchor: end; }
.chart .y-title {
  fill: var(--fg-3);
  font: 500 13px/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-anchor: middle;
}
.chart .x-label { fill: var(--fg-2); font: 500 15px/1.2 var(--font-body); text-anchor: middle; }
.chart .val { fill: var(--fg-1); font: 600 15px/1 var(--font-body); text-anchor: middle; }
.chart .bar-1 { fill: var(--c-tan); }
.chart .bar-4 { fill: var(--accent); }

.legend {
  display: flex;
  gap: 24px;
  margin: 18px 0 0;
  padding: 0;
  font: 400 14px/1 var(--font-body);
  color: var(--fg-2);
}
.legend .key { display: inline-flex; align-items: center; gap: 8px; }
.legend .sw { width: 14px; height: 14px; border-radius: 3px; display: inline-block; }
.legend .sw-1 { background: var(--c-tan); }
.legend .sw-4 { background: var(--accent); }

.chart-note {
  margin: 18px 0 0;
  font: 400 13px/1.5 var(--font-mono);
  letter-spacing: 0;
  color: var(--fg-3);
}

/* ---------- Footer ---------- */
.footer {
  flex-shrink: 0;
  border-top: 1px solid var(--border);
  background: var(--c-beige-100);
}
.footer .shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 24px;
  padding-bottom: 24px;
}
.footer .mark { color: var(--fg-1); height: 22px; opacity: 0.85; }
.footer .mark svg { height: 100%; width: auto; }
.footer .copy {
  font: 400 13px/1 var(--font-mono);
  letter-spacing: 0;
  color: var(--fg-3);
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  .toplinks { gap: 18px; }
  main { padding: 48px 0; }
  .footer .shell { flex-direction: column; align-items: flex-start; gap: 14px; }
}