/* Certulo holding site (v3, Mon 9 set). One stylesheet, no scripts, no inline styles.
   Colours and type from the v2 tokens: paper, ink, one signal colour (focus only). */

@font-face {
  font-family: 'Instrument Sans';
  font-style: normal;
  font-display: swap;
  font-weight: 400 700;
  font-stretch: 75% 100%;
  src: url('/fonts/instrument-sans-var.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Source Serif 4';
  font-style: normal;
  font-display: swap;
  font-weight: 200 900;
  src: url('/fonts/source-serif-4-var.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Instrument Sans Fallback';
  src: local('Arial'), local('Helvetica Neue'), local('Helvetica');
  size-adjust: 97%;
  ascent-override: 96%;
  descent-override: 25%;
  line-gap-override: 0%;
}
@font-face {
  font-family: 'Source Serif Fallback';
  src: local('Georgia'), local('Times New Roman');
  size-adjust: 103%;
  ascent-override: 92%;
  descent-override: 30%;
  line-gap-override: 0%;
}

:root {
  color-scheme: light;
  --paper: #F4F1EA;
  --ink: #15171B;
  --ink-2: #454952;
  --rule: #CBC4B4;
  --rule-strong: #8F897C;
  --signal: #C8361B;
  --font-sans: 'Instrument Sans', 'Instrument Sans Fallback', system-ui, sans-serif;
  --font-serif: 'Source Serif 4', 'Source Serif Fallback', Georgia, serif;
  --step--2: clamp(0.72rem, 0.70rem + 0.10vw, 0.78rem);
  --step--1: clamp(0.84rem, 0.81rem + 0.14vw, 0.92rem);
  --step-0: clamp(1rem, 0.96rem + 0.20vw, 1.12rem);
  --step-1: clamp(1.2rem, 1.12rem + 0.40vw, 1.45rem);
  --step-2: clamp(1.44rem, 1.28rem + 0.80vw, 1.95rem);
  --step-4: clamp(1.9rem, 1.4rem + 2.6vw, 3.4rem);
  --gutter: clamp(1rem, 0.6rem + 2vw, 2.5rem);
  --page-max: 72rem;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; background: var(--paper); }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.55;
  font-variant-numeric: lining-nums proportional-nums;
  overflow-wrap: break-word;
}
h1, h2 { margin: 0; font-weight: 600; line-height: 1.22; letter-spacing: -0.01em; text-wrap: balance; }
p { margin: 0; text-wrap: pretty; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--signal); outline-offset: 2px; border-radius: 2px; }

.skip { position: absolute; left: -999px; top: 0; padding: 0.5rem 0.75rem; background: var(--paper); }
.skip:focus { left: var(--gutter); top: 0.5rem; z-index: 1; }

.wrap { width: 100%; max-width: var(--page-max); margin-inline: auto; padding-inline: var(--gutter); }

.label {
  font-size: var(--step--2);
  font-weight: 600;
  font-stretch: 85%;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-2);
}

/* Header */
.site-header { border-bottom: 1px solid var(--rule); }
.site-header__row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 4.5rem; }
.wordmark {
  display: inline-block;
  font-weight: 640; font-stretch: 88%; letter-spacing: -0.012em; font-size: 1.32rem;
  line-height: 1; padding-bottom: 0.2em; border-bottom: 4px double currentColor;
  text-decoration: none;
}
.site-nav a {
  display: inline-flex; align-items: center; min-height: 2.75rem;
  font-size: var(--step--1); font-weight: 560; text-decoration: none;
}
.site-nav a:hover, .site-nav a[aria-current="page"] { text-decoration: underline; text-decoration-thickness: 2px; }

/* Main */
main { flex: 1; }
.hero { padding-block: clamp(3rem, 2rem + 8vw, 9rem); }
.hero h1 { margin-top: 1rem; max-width: 22em; font-size: var(--step-4); line-height: 1.12; }
.status { margin-top: 1.75rem; font-family: var(--font-serif); font-size: var(--step-1); }
.hero .home-link { margin-top: 1.25rem; font-size: var(--step-0); }

.prose { max-width: 40rem; padding-block: clamp(2.5rem, 2rem + 4vw, 5rem); }
.prose h1 { font-size: var(--step-4); }
.prose .updated { margin-top: 0.75rem; font-size: var(--step--1); color: var(--ink-2); }
.prose h2 { margin-top: 2.5rem; font-size: var(--step-2); }
.prose p { margin-top: 0.75rem; font-family: var(--font-serif); font-size: 1.1rem; line-height: 1.6; }
.prose .lede { margin-top: 1.75rem; }

.site-nav { display: flex; gap: 1.25rem; }

/* Home: the company */
.company { border-top: 1px solid var(--rule); padding-block: 2rem 3.5rem; max-width: 40rem; }
.company h2 { font-size: var(--step-1); }
.company p { margin-top: 0.75rem; font-family: var(--font-serif); font-size: 1.1rem; line-height: 1.6; }

/* Founder */
.founder { display: grid; grid-template-columns: minmax(0, 1fr) 26rem; gap: 3rem; align-items: start; padding-block: clamp(2.5rem, 2rem + 4vw, 5rem); }
.founder .prose { padding-block: 0; }
.founder .prose h1 { margin-top: 0.75rem; }
.prose .label { margin-top: 0; font-family: var(--font-sans); font-size: var(--step--2); line-height: 1.55; }
.founder__portrait { margin: 0; }
.founder__portrait img { display: block; width: 100%; height: auto; border: 1px solid var(--rule-strong); }
.founder__portrait figcaption { margin-top: 0.5rem; font-size: var(--step--2); color: var(--ink-2); }
@media (max-width: 760px) {
  .founder { grid-template-columns: 1fr; gap: 2rem; }
  .founder__portrait { max-width: 22rem; }
}

/* Footer */
.site-footer { border-top: 1.5px solid var(--ink); padding-block: 1.5rem 2rem; font-size: var(--step--1); color: var(--ink-2); }
.site-footer p { display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; }
.site-footer a { color: var(--ink); }