/* The site's visual system: colour, type, focus and the shared page chrome
   (skip link, header, footer). Every page is meant to load this first and
   build on these tokens; see
   docs/superpowers/specs/2026-09-28-site-identity-and-home-design.md.

   Dark only, one accent (sage), system fonts only. Contrast on --bg:
   text 12.7:1, muted 5.8:1, sage 8.9:1. */

:root {
  --bg: #020403;
  --surface: #08100B;
  --raised: #0D1811;
  --text: #CFCBBF;
  --muted: #838A80;
  --sage: #8FB39A;
  --sage-hi: #A9C7B2;
  --error: #E0664F;
  --line: rgba(143, 179, 154, 0.16);
  --line-strong: rgba(143, 179, 154, 0.38);

  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --gutter: clamp(16px, 5vw, 56px);
  --measure: 38rem;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);

  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font: 400 1rem/1.65 var(--font);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, p, ul, ol { margin: 0; }
img, svg, canvas { display: block; max-width: 100%; }

a { color: var(--sage); text-decoration: none; }
a:hover { color: var(--sage-hi); }

::selection { background: var(--sage); color: var(--bg); }

:focus-visible {
  outline: 2px solid var(--sage-hi);
  outline-offset: 3px;
  border-radius: 2px;
}

/* Read by screen readers, not shown. */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* Small uppercase section label. */
.label {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Inline text link with a quiet underline that brightens on hover. */
.text-link {
  color: var(--sage);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 1px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.text-link:hover { color: var(--sage-hi); border-bottom-color: var(--sage-hi); }

/* ---------- skip link ---------- */

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: 0;
  z-index: 100;
  padding: 10px 14px;
  background: var(--sage);
  color: var(--bg);
  font-weight: 500;
  border-radius: 0 0 3px 3px;
  transform: translateY(-110%);
  transition: transform 0.2s var(--ease);
}
.skip-link:focus { transform: none; color: var(--bg); }

/* ---------- header ---------- */

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 22px var(--gutter);
  font-size: 0.9375rem;
}
.site-header .place { color: var(--text); font-weight: 500; }
.site-header nav { display: flex; gap: clamp(14px, 2.4vw, 28px); flex-wrap: wrap; justify-content: flex-end; }
.site-header nav a {
  color: var(--muted);
  padding: 4px 0;
  transition: color 0.2s var(--ease);
}
.site-header nav a:hover,
.site-header nav a[aria-current="page"] { color: var(--text); }

/* ---------- footer ---------- */

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: clamp(64px, 10vw, 120px);
  padding: 22px var(--gutter) 28px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.875rem;
}
.site-footer nav { display: flex; gap: 20px; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--text); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}