/* Byta Labs — editorial static site */

:root {
  --paper: #FAFAF7;
  --ink: #121212;
  --muted: #6B6B68;
  --hairline: #E5E4DF;

  --serif: "Instrument Serif", "Iowan Old Style", "Apple Garamond", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;

  --max-width: 1120px;
  --gutter: 48px;

  --fs-display: clamp(38px, 7vw, 88px);
  --fs-section: clamp(32px, 4.2vw, 48px);
  --fs-item: clamp(24px, 2.4vw, 28px);
  --fs-lede: clamp(17px, 1.5vw, 20px);
  --fs-body: 17px;
  --fs-eyebrow: 12px;

  --lh-tight: 1.05;
  --lh-snug: 1.2;
  --lh-body: 1.55;

  --space-xxl: 160px;
  --space-xl: 112px;
  --space-lg: 64px;
  --space-md: 32px;
  --space-sm: 16px;
  --space-xs: 8px;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
h1, h2, h3, p, ol, ul { margin: 0; padding: 0; }
ol, ul { list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }

html {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body { overflow-x: hidden; }

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

main { flex: 1; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: var(--space-xs) var(--space-sm);
  background: var(--ink);
  color: var(--paper);
  font-size: 14px;
}
.skip-link:focus { left: var(--space-sm); top: var(--space-sm); }

/* Header */
.site-header {
  padding-top: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--hairline);
}
.site-header__inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-md);
}
.wordmark {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 16px;
  letter-spacing: 0.01em;
}
.site-header__contact {
  font-size: 14px;
  color: var(--muted);
  transition: color 120ms ease;
}
.site-header__contact:hover,
.site-header__contact:focus-visible { color: var(--ink); }

/* Eyebrow label */
.eyebrow {
  font-size: var(--fs-eyebrow);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--space-md);
}

/* Hero */
.hero {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xxl);
  border-bottom: 1px solid var(--hairline);
}
.display {
  font-family: var(--serif);
  font-weight: 400;
  font-size: var(--fs-display);
  line-height: var(--lh-tight);
  letter-spacing: -0.015em;
  color: var(--ink);
  max-width: 18ch;
  margin-bottom: var(--space-lg);
  overflow-wrap: break-word;
  hyphens: auto;
}
.display em {
  font-style: italic;
  font-weight: 400;
}
.lede {
  font-family: var(--sans);
  font-size: var(--fs-lede);
  line-height: 1.5;
  color: var(--muted);
  max-width: 58ch;
}

/* Focus section */
.focus {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--hairline);
}
.section-heading {
  font-family: var(--serif);
  font-weight: 400;
  font-style: italic;
  font-size: var(--fs-section);
  line-height: var(--lh-snug);
  letter-spacing: -0.01em;
  margin-bottom: var(--space-xl);
  max-width: 22ch;
}
.focus-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}
.focus-item {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(0, 2fr);
  gap: var(--space-lg);
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--hairline);
}
.focus-item:last-child { border-bottom: 1px solid var(--hairline); }
.focus-item__title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: var(--fs-item);
  line-height: var(--lh-snug);
  letter-spacing: -0.005em;
  color: var(--ink);
}
.focus-item__body {
  font-family: var(--sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--muted);
  max-width: 58ch;
}

/* Contact */
.contact {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xxl);
}
.contact__link-wrap { margin-top: var(--space-md); }
.contact__link {
  display: inline-flex;
  align-items: baseline;
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ink);
  border-bottom: 1px solid var(--hairline);
  transition: border-color 120ms ease;
}
.contact__link:hover,
.contact__link:focus-visible { border-bottom-color: var(--ink); }
.contact__arrow { font-style: normal; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--hairline);
  padding-top: var(--space-md);
  padding-bottom: var(--space-md);
  font-size: 14px;
  color: var(--muted);
}
.site-footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-md);
}

/* Focus-visible */
:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
  border-radius: 1px;
}
a:focus-visible { outline-offset: 4px; }

/* Responsive */
@media (max-width: 1023px) {
  :root {
    --gutter: 32px;
    --space-xxl: 120px;
    --space-xl: 88px;
    --space-lg: 48px;
  }
  .focus-item {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
}

@media (max-width: 639px) {
  :root {
    --gutter: 24px;
    --space-xxl: 96px;
    --space-xl: 64px;
  }
  .site-header__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
  }
  .display {
    max-width: none;
    letter-spacing: -0.01em;
  }
  .contact__link {
    flex-wrap: wrap;
    line-height: 1.15;
    font-size: clamp(28px, 7vw, 40px);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}