/* Vega Blue — design tokens, reset, typography */

:root {
  /* Ink (dark surfaces) */
  --ink:        #05090f;
  --ink-2:      #0a1220;
  --ink-3:      #101b2d;

  /* Paper (light surfaces) */
  --paper:      #f4f1ea;
  --paper-2:    #e8e3d8;

  /* Brand */
  --teal:       #2e9e8b;
  --teal-lt:    #58c9b0;
  --blue:       #3e93d6;
  --blue-lt:    #6fc4f2;
  --seam:       #2a7fa8;

  /* Text */
  --on-ink:         #eef4ff;
  --on-ink-dim:     rgba(238, 244, 255, 0.60);
  --on-ink-faint:   rgba(238, 244, 255, 0.48);
  --on-paper:       #0b141f;
  --on-paper-dim:   rgba(11, 20, 31, 0.64);
  --on-paper-faint: rgba(11, 20, 31, 0.50);

  /* Hairlines */
  --rule-ink:   rgba(238, 244, 255, 0.11);
  --rule-paper: rgba(11, 20, 31, 0.13);

  /* Type */
  --display: "Instrument Serif", "Iowan Old Style", Georgia, serif;
  --body: "Archivo", "Helvetica Neue", Helvetica, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Metrics */
  --gutter: clamp(1.25rem, 5vw, 4.5rem);
  --measure: 68ch;
  --shell: 1280px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

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

body {
  margin: 0;
  background: var(--ink);
  color: var(--on-ink);
  font-family: var(--body);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  font-weight: 400;
  line-height: 1.62;
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--display);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.018em;
  text-wrap: balance;
}

h1 { font-size: clamp(2.6rem, 1.5rem + 4.4vw, 5.15rem); }
h2 { font-size: clamp(2.1rem, 1.3rem + 3.4vw, 4rem); }
h3 { font-size: clamp(1.35rem, 1.15rem + 0.9vw, 1.85rem); }

p { margin: 0 0 1.15em; max-width: var(--measure); text-wrap: pretty; }
p:last-child { margin-bottom: 0; }

a { color: inherit; text-decoration: none; }

img, svg { display: block; max-width: 100%; }

ul { margin: 0; padding: 0; list-style: none; }

::selection {
  background: var(--teal-lt);
  color: var(--ink);
}

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

/* Monospace micro-labels — the recurring "instrument panel" voice */
.label {
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
  margin: 0;
  font-family: var(--mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--on-ink-faint);
}

.label::before {
  content: "";
  width: 1.75rem;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}

.label--paper { color: var(--on-paper-faint); }

.lede {
  font-size: clamp(1.0625rem, 1rem + 0.35vw, 1.25rem);
  line-height: 1.58;
  color: var(--on-ink-dim);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  background: var(--paper);
  color: var(--on-paper);
  font-family: var(--mono);
  font-size: 0.75rem;
}

.skip-link:focus { left: 0.5rem; top: 0.5rem; }

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