/* =========================================================================
   DATspire — site styles

   Colour is not invented here. Every token below is lifted verbatim from
   src/ui/theme/schemes.ts in the dat.form codebase, where the pairings are
   measured against WCAG AA by schemes.test.ts rather than eyeballed.
   Light scheme -> :root. Dark scheme -> prefers-color-scheme: dark.
   ========================================================================= */

:root {
  /* dat.form "light" palette */
  --bg:            #FFFFFF;
  --surface:       #F8F9FA;
  --surface-raised:#EDEDED;
  --border:        #E0E0E0;
  --border-strong: #C7C7C7;
  --divider:       #EEEEEE;

  --text:          #333333;
  --text-muted:    #5C5C5C;
  --text-faint:    #707070;

  --accent:        #21C164;  /* fills only — 2.4:1 as text, never a word */
  --accent-text:   #12803F;  /* the accent when it must be read */
  --accent-2:      #0E7C8C;
  --accent-muted:  #E3F7EB;
  --on-accent:     #06170E;  /* 7.8:1 on the green */

  --fat:           #C2410C;
  --lean:          #0369A1;

  --measure: 34rem;
  --page: 1.25rem;
  --radius: 14px;
  --radius-lg: 20px;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    /* dat.form "dark" palette */
    --bg:            #121212;
    --surface:       #1F1F1F;
    --surface-raised:#2A2A2A;
    --border:        #333333;
    --border-strong: #4A4A4A;
    --divider:       #2C2C2C;

    --text:          #F1F1F1;
    --text-muted:    #A3A3A3;
    --text-faint:    #8A8A8A;

    --accent:        #21C164;
    --accent-text:   #21C164;  /* passes on #121212 */
    --accent-2:      #03A5F4;
    --accent-muted:  #16351F;
    --on-accent:     #06170E;

    --fat:           #FB923C;
    --lean:          #38BDF8;

    color-scheme: dark;
  }
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
               'Helvetica Neue', Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--accent-text); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 2px solid var(--accent-text);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip {
  position: absolute; left: -9999px;
  background: var(--accent); color: var(--on-accent);
  padding: .6rem 1rem; border-radius: 8px; font-weight: 600;
}
.skip:focus { left: var(--page); top: var(--page); z-index: 10; }

/* ---------------------------------------------------------------- layout */

.wrap {
  max-width: 62rem;
  margin-inline: auto;
  padding-inline: var(--page);
}

.prose { max-width: var(--measure); }

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

.site-head {
  border-bottom: 1px solid var(--divider);
  position: sticky; top: 0;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(150%) blur(12px);
  z-index: 5;
}
.site-head .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; min-height: 62px;
}

.brand {
  font-weight: 700; letter-spacing: -0.02em; font-size: 1.05rem;
  color: var(--text); text-decoration: none;
}
.brand .dot { color: var(--accent-text); }

.nav { display: flex; gap: 1.25rem; font-size: .95rem; }
.nav a { color: var(--text-muted); text-decoration: none; }
.nav a:hover, .nav a[aria-current='page'] { color: var(--text); }

/* ------------------------------------------------------------------ hero */

.hero { padding: clamp(3.5rem, 11vw, 7rem) 0 clamp(2.5rem, 7vw, 4.5rem); }

.eyebrow {
  font-size: .78rem; font-weight: 600; letter-spacing: .14em;
  text-transform: uppercase; color: var(--text-faint); margin: 0 0 1.1rem;
}

h1 {
  font-size: clamp(2.1rem, 6.4vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.032em;
  font-weight: 700;
  margin: 0 0 1.1rem;
  max-width: 18ch;
}

.lede {
  font-size: clamp(1.08rem, 2.4vw, 1.28rem);
  color: var(--text-muted);
  max-width: 46ch;
  margin: 0 0 2rem;
}

.cta-row { display: flex; flex-wrap: wrap; gap: .75rem; align-items: center; }

.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  background: var(--accent); color: var(--on-accent);
  font-weight: 650; font-size: 1rem;
  padding: .8rem 1.4rem; border-radius: 999px;
  text-decoration: none; border: 1px solid transparent;
}
.btn:hover { filter: brightness(1.06); }

.btn-quiet {
  background: transparent; color: var(--text);
  border-color: var(--border-strong);
}
.btn-quiet:hover { background: var(--surface); filter: none; }

.note { font-size: .9rem; color: var(--text-faint); margin: 1rem 0 0; }

/* ----------------------------------------------------------------- cards */

.section { padding: clamp(2.5rem, 7vw, 4.5rem) 0; }
.section + .section { border-top: 1px solid var(--divider); }

h2 {
  font-size: clamp(1.4rem, 3.4vw, 1.9rem);
  letter-spacing: -0.022em; line-height: 1.2;
  margin: 0 0 .6rem;
}
h3 { font-size: 1.05rem; margin: 0 0 .4rem; letter-spacing: -0.012em; }

.section-lede { color: var(--text-muted); max-width: 48ch; margin: 0 0 2.2rem; }

.grid {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(15.5rem, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem;
}
.card p { margin: 0; color: var(--text-muted); font-size: .96rem; }

.card .mark {
  width: 30px; height: 30px; margin-bottom: .85rem;
  color: var(--accent-text);
}
.card .mark svg { width: 100%; height: 100%; display: block; }

/* the honesty panel */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.4rem 1.5rem;
  max-width: var(--measure);
}
.panel p:last-child { margin-bottom: 0; }

/* ------------------------------------------------------------- long copy */

.doc { padding: clamp(2.5rem, 6vw, 4rem) 0 5rem; }
.doc h1 { font-size: clamp(1.8rem, 4.6vw, 2.5rem); max-width: none; }
.doc h2 {
  margin: 2.6rem 0 .7rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--divider);
  font-size: 1.28rem;
}
.doc h3 { margin: 1.8rem 0 .4rem; font-size: 1.04rem; }
.doc p, .doc li { color: var(--text-muted); }
.doc strong { color: var(--text); font-weight: 650; }
.doc ul { padding-left: 1.15rem; }
.doc li { margin-bottom: .4rem; }

.meta {
  color: var(--text-faint); font-size: .93rem;
  margin: 0 0 2rem; padding-bottom: 1.4rem;
  border-bottom: 1px solid var(--divider);
}
.meta span { display: block; }

.doc table {
  width: 100%; border-collapse: collapse; margin: 1.2rem 0;
  font-size: .95rem;
}
.doc th, .doc td {
  text-align: left; padding: .65rem .8rem;
  border-bottom: 1px solid var(--divider); vertical-align: top;
}
.doc th { color: var(--text); font-weight: 650; }
.doc td { color: var(--text-muted); }

.table-scroll { overflow-x: auto; }

.callout {
  background: var(--accent-muted);
  border-radius: var(--radius);
  padding: 1.1rem 1.3rem;
  margin: 1.5rem 0;
}
.callout p { color: var(--text); margin: 0; }

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

.site-foot {
  border-top: 1px solid var(--divider);
  padding: 2.4rem 0 3rem;
  color: var(--text-faint); font-size: .92rem;
}
.site-foot .wrap {
  display: flex; flex-wrap: wrap; gap: 1rem 2rem;
  justify-content: space-between; align-items: baseline;
}
.site-foot a { color: var(--text-muted); text-decoration: none; }
.site-foot a:hover { color: var(--text); text-decoration: underline; }
.foot-links { display: flex; flex-wrap: wrap; gap: 1.25rem; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}