/* Reset, typography, layout primitives, accessibility. */

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

* { margin: 0; padding: 0; }

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

body {
  min-height: 100dvh;
  font-family: var(--font-ui);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

h1 { font-size: var(--text-xl); }
h2 { font-size: var(--text-lg); }
h3 { font-size: var(--text-md); }

p { text-wrap: pretty; }

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button { background: none; border: none; cursor: pointer; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }

svg { display: block; flex: none; }

ul { list-style: none; }

/* --- Accessibility ------------------------------------------------------ */

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

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

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

.skip-link {
  position: absolute;
  top: var(--sp-2);
  left: var(--sp-2);
  z-index: 200;
  padding: var(--sp-2) var(--sp-4);
  background: var(--accent);
  color: var(--accent-text);
  border-radius: var(--radius);
  transform: translateY(-200%);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus { transform: none; }

@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;
  }
}

/* --- Layout ------------------------------------------------------------- */

.shell {
  width: min(100% - 2 * var(--sp-4), 1180px);
  margin-inline: auto;
}

.shell--narrow { width: min(100% - 2 * var(--sp-4), 860px); }

.stack > * + * { margin-top: var(--flow, var(--sp-4)); }

.row {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.row--between { justify-content: space-between; }
.push { margin-inline-start: auto; }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.muted { color: var(--text-muted); }
.faint { color: var(--text-faint); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-faint);
}

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

.appbar {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding-inline: var(--sp-5);
  background: color-mix(in oklab, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid var(--border);
}

.appbar__title {
  font-size: var(--text-sm);
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.appbar__provider {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--provider, var(--accent));
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--provider, var(--accent)) 22%, transparent);
}