/* ==========================================================================
   Reset and base typography
   ========================================================================== */

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

* { margin: 0; padding: 0; }

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

body {
  min-height: 100svh;
  font-family: var(--font);
  font-size: var(--fs-md);
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Two soft colour fields behind everything. Fixed so the glow stays put while
   the page scrolls, and inert so it never intercepts a click. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(60vw 60vh at 12% -10%, var(--bg-glow-a), transparent 70%),
    radial-gradient(55vw 55vh at 92% 8%, var(--bg-glow-b), transparent 70%);
}

h1, h2, h3 { font-weight: 600; line-height: 1.2; letter-spacing: -0.015em; }

button, input, select { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

/* Every number on this page is either compared vertically or updated in place,
   so digits must not change width as values change. */
.num {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1, "ss01" 1;
}

/* Visible only to screen readers. */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

@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;
  }
}