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

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

body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh);
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 var(--s0); font-weight: 650; letter-spacing: -0.01em; }
h1 { font-size: var(--fs-xl); font-family: var(--font-serif); font-weight: 600; letter-spacing: -0.015em; }
h2 { font-size: var(--fs-lg); }
h3 { font-size: var(--fs-md); }
p { margin: 0 0 var(--s1); }
ul, ol { margin: 0 0 var(--s1); padding-left: 1.4em; }
li + li { margin-top: var(--s-1); }

a { color: var(--c-teal); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

img, svg { max-width: 100%; }
.icon { flex: none; vertical-align: middle; }

:focus-visible {
  outline: 3px solid var(--c-focus);
  outline-offset: 2px;
  border-radius: 4px;
}
main:focus { outline: none; }

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

textarea, input[type="text"], input[type="url"], input[type="password"], select {
  width: 100%;
  min-height: var(--tap);
  padding: 10px 12px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: var(--c-surface);
  transition: border-color var(--dur) var(--ease);
}
textarea { min-height: 120px; resize: vertical; line-height: 1.5; }
textarea:focus, input:focus, select:focus { border-color: var(--c-teal); }
label { font-weight: 550; }

code, pre { font-family: var(--font-mono); font-size: 0.92em; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute;
  left: var(--s1);
  top: -100px;
  z-index: 100;
  padding: var(--s0) var(--s1);
  background: var(--c-primary);
  color: var(--c-on-primary);
  border-radius: var(--radius-sm);
}
.skip-link:focus { top: var(--s1); }

.noscript { padding: var(--s3); text-align: center; }

@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;
  }
}

@media print {
  .sidebar, .bottom-nav, .banner, .no-print, .toast { display: none !important; }
  body { background: #fff; color: #000; }
  .main-col { margin: 0 !important; }
}

/* Headings receive focus programmatically on navigation; no ring needed there. */
[tabindex="-1"]:focus { outline: none; }
[hidden] { display: none !important; }