/* ==========================================================================
   Base reset, typography, and layout primitives
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font-primary);
  background: var(--cream);
  color: var(--charcoal);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
ul, ol { margin: 0; padding: 0; }
button { font-family: inherit; }

/* Focus visibility — never suppressed, per Section 13 Accessibility */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--focus-ring-light);
  outline-offset: 2px;
  border-radius: 4px;
}
.on-dark :focus-visible {
  outline-color: var(--focus-ring-dark);
}

/* Type scale — mobile-first, desktop overrides at 1024px per breakpoints */
h1, .h1 {
  font-size: 28px; font-weight: 700; line-height: 1.25; letter-spacing: -0.01em;
  color: var(--navy-900); margin: 0 0 var(--space-4);
}
h2, .h2 {
  font-size: 22px; font-weight: 600; line-height: 1.3; letter-spacing: -0.005em;
  color: var(--navy-900); margin: 0 0 var(--space-4);
}
h3, .h3 {
  font-size: 18px; font-weight: 600; line-height: 1.35;
  color: var(--navy-900); margin: 0 0 var(--space-3);
}
h4, .h4 {
  font-size: 16px; font-weight: 600; line-height: 1.4;
  color: var(--navy-900); margin: 0 0 var(--space-2);
}
p { margin: 0 0 var(--space-4); }
.body-lg { font-size: 18px; line-height: 1.6; }
.body-standard { font-size: 16px; line-height: 1.6; }
.body-sm { font-size: 14px; line-height: 1.55; }
.caption { font-size: 13px; line-height: 1.5; color: var(--muted-text); }
.legal-text { font-size: 13px; line-height: 1.6; color: var(--muted-text); }
.form-label { font-size: 15px; font-weight: 600; line-height: 1.4; }
.accent-serif {
  font-family: var(--font-accent);
  font-style: italic;
  font-weight: 400;
  font-size: 20px;
  line-height: 1.5;
  color: var(--navy-900);
}

@media (min-width: 1024px) {
  h1, .h1 { font-size: 40px; }
  h2, .h2 { font-size: 28px; }
  h3, .h3 { font-size: 20px; }
  h4, .h4 { font-size: 17px; }
}

.muted { color: var(--muted-text); }
.text-teal-link { color: var(--teal-700); }

/* Layout primitives */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: var(--gutter-mobile);
  padding-right: var(--gutter-mobile);
}
@media (min-width: 640px) {
  .container { padding-left: var(--gutter-tablet); padding-right: var(--gutter-tablet); }
}
@media (min-width: 1024px) {
  .container { padding-left: var(--gutter-desktop); padding-right: var(--gutter-desktop); }
}
.container-narrow {
  max-width: var(--narrow-width);
  margin: 0 auto;
  padding-left: var(--gutter-mobile);
  padding-right: var(--gutter-mobile);
}

.section { padding-top: var(--space-8); padding-bottom: var(--space-8); }
@media (min-width: 1024px) {
  .section { padding-top: var(--space-9); padding-bottom: var(--space-9); }
}

.stack > * + * { margin-top: var(--space-5); }
@media (min-width: 1024px) {
  .stack-desktop > * + * { margin-top: var(--space-6); }
}

.grid { display: grid; gap: var(--space-4); }
@media (min-width: 1024px) { .grid { gap: var(--space-5); } }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
@media (min-width: 640px) {
  .grid-2 { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: 1fr 1fr 1fr; }
}

.sr-only {
  position: absolute; 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: -9999px; top: 0; z-index: 1000;
  background: var(--navy-900); color: var(--cream-white);
  padding: var(--space-3) var(--space-4); border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

hr.divider { border: none; border-top: 1px solid var(--divider); margin: var(--space-6) 0; }