/* Base Reset, Typography, and Accessibility Foundations */

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

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

body {
  margin: 0;
  min-height: 100dvh;
  color: var(--text);
  background-color: var(--bg);
  font-family: var(--font-ui);
  font-size: var(--t-body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Tabular figures for dynamic values and metrics */
.tabular,
.metric-value,
.hud strong,
.phase-index,
.mono-label,
[data-font-num] {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums lining-nums;
}

/* Headings & Text */
h1, h2, h3, h4, h5, h6 {
  color: var(--text);
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
}

p {
  color: var(--text-muted);
}

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

/* Input Floor & Controls */
button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  font-family: var(--font-ui);
}

input,
select,
textarea {
  font-size: 16px; /* Strict 16px floor to prevent iOS automatic viewport zoom */
}

/* Focus Visible Rings (≥3:1 contrast against all surfaces) */
:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 2px;
}

button:focus:not(:focus-visible),
a:focus:not(:focus-visible) {
  outline: none;
}

[hidden] {
  display: none !important;
}

/* Global Reduced Motion Override */
@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;
    scroll-behavior: auto !important;
  }
}