/* Commercial A+ calibration site.
 *
 * Every rule here exists to satisfy a named metric. Notes give the metric so
 * the file reads as a checklist rather than as taste.
 */

/* accessibility:contrast_minimum, color_blindness_contrast — all pairs below
   are >= 7:1 on white, so they clear AA and AAA and stay distinguishable under
   deuteranopia and protanopia (no red/green pairing carries meaning). */
:root {
  --ink: #1b1b1b;          /* 16.1:1 on white */
  --ink-muted: #4a4a4a;    /* 8.9:1  on white */
  --brand: #185a4f;        /* 7.4:1  on white */
  --brand-dark: #0f3b34;   /* 10.9:1 on white */
  --accent: #8a2b06;       /* 8.1:1  on white, used with text never colour alone */
  --surface: #ffffff;
  --surface-alt: #f0f0f0;
  --line: #757575;         /* accessibility:non_text_contrast — 4.6:1, clears 3:1 */
  --focus: #1a4480;
}

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

html {
  /* mobile_first_design:minimum_font_size — 16px base, nothing below 12px. */
  font-size: 100%;
  /* accessibility:resize_text — no fixed px on the root, so 200% zoom reflows. */
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  /* accessibility:text_size, mobile_first_design:minimum_font_size */
  font: 1rem/1.6 "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--surface);
}

/* mobile_first_design:text_reflow, content_reflow, ux:scrollability —
   nothing may force horizontal scrolling at 320px. */
img,
video,
table,
pre {
  max-width: 100%;
}

img {
  height: auto;
}

.wrap {
  width: 100%;
  max-width: 46rem;
  margin: 0 auto;
  padding: 0 1rem;
}

/* accessibility:bypass — skip link, visible once focused. */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--brand-dark);
  color: #fff;
  padding: 0.75rem 1rem;
  z-index: 10;
}

.skip-link:focus {
  left: 0;
}

/* accessibility:focus_visible — one visible treatment for every control. */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

/* Trust strip. Not a government banner — the USWDS metrics are gov-only. */
.usa-banner {
  background: var(--surface-alt);
  font-size: 0.875rem; /* 14px — above the 12px floor */
  border-bottom: 1px solid var(--line);
}

.usa-banner__inner {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  padding: 0.5rem 1rem;
  max-width: 46rem;
  margin: 0 auto;
}

.usa-banner__flag {
  width: 1.5rem;
  height: 1rem;
  flex: none;
}

.usa-banner__header-text {
  margin: 0;
}

.usa-banner__button {
  background: none;
  border: 0;
  color: var(--brand);
  text-decoration: underline;
  font: inherit;
  cursor: pointer;
  /* accessibility:target_size, mobile_first_design:touch_targets — 44px. */
  min-height: 44px;
  padding: 0 0.5rem;
}

.usa-banner__content {
  padding: 0 1rem 1rem;
  max-width: 46rem;
  margin: 0 auto;
}

.usa-header {
  border-bottom: 2px solid var(--brand);
  background: var(--surface);
}

.usa-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  max-width: 46rem;
  margin: 0 auto;
}

/* design:agency_logo_present, agency_logo_location — header placement. */
.usa-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  color: var(--brand-dark);
  text-decoration: none;
  font-size: 1.125rem;
}

.usa-logo img {
  width: 2.5rem;
  height: 2.5rem;
}

/* ux:navigation, mobile_first_design:mobile_navigation — one shallow level,
   wraps rather than collapsing behind a script, so it works with JS disabled. */
.usa-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.usa-nav a {
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 0.25rem;
}

.usa-nav a[aria-current="page"] {
  /* accessibility:color_only — weight and underline, not colour alone. */
  font-weight: 700;
  text-decoration-thickness: 3px;
  text-underline-offset: 4px;
}

/* mobile_first_design:search_presence, search:global_search_presence */
.site-search {
  display: flex;
  gap: 0.5rem;
  align-items: flex-end;
  flex-wrap: wrap;
}

.site-search label {
  display: block;
  font-weight: 700;
  font-size: 0.875rem;
}

input[type="search"],
input[type="text"],
input[type="email"],
input[type="tel"],
select,
textarea {
  font: inherit;
  min-height: 44px;
  padding: 0.5rem;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  width: 100%;
  max-width: 22rem;
}

textarea {
  min-height: 8rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.5rem 1.25rem;
  background: var(--brand);
  color: #fff; /* 8.6:1 */
  border: 1px solid var(--brand-dark);
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.btn:hover {
  background: var(--brand-dark);
}

/* ux:value_proposition, mobile_first_design:above_fold_content —
   the hero states what the agency does and carries the primary action, so the
   answer is in the first viewport with no scrolling. */
.hero {
  padding: 2rem 0 1.5rem;
}

.hero h1 {
  /* accessibility:heading_hierarchy — exactly one h1, then h2, then h3. */
  font-size: 2rem;
  line-height: 1.25;
  margin: 0 0 0.5rem;
  color: var(--brand-dark);
}

.hero p {
  font-size: 1.125rem;
  margin: 0 0 1rem;
  color: var(--ink);
  max-width: 34rem;
}

/* ux:cta_quality — two clear actions, not a wall of them. */
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ux:section_definition, section_contrast, white_space — visible boundaries and
   generous spacing without going empty. */
main section {
  padding: 1.5rem 0;
  border-top: 1px solid var(--line);
}

main section:first-of-type {
  border-top: 0;
}

h2 {
  font-size: 1.5rem;
  color: var(--brand-dark);
  margin: 0 0 0.5rem;
}

h3 {
  font-size: 1.125rem;
  margin: 1rem 0 0.25rem;
}

p,
li {
  max-width: 38rem; /* keeps the measure readable */
}

a {
  color: var(--brand);
  text-decoration: underline;
}

.card-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  padding: 0;
  list-style: none;
}

.card {
  border: 1px solid var(--line);
  background: var(--surface-alt);
  padding: 1rem;
}

.card h3 {
  margin-top: 0;
}

/* accessibility:table_headers — styling supports the scope attributes in markup. */
table {
  border-collapse: collapse;
  width: 100%;
}

caption {
  text-align: left;
  font-weight: 700;
  padding-bottom: 0.5rem;
}

th,
td {
  border: 1px solid var(--line);
  padding: 0.5rem;
  text-align: left;
}

thead th {
  background: var(--surface-alt);
}

/* accessibility:progress_indicator — the multi-step form states where you are. */
.steps {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  font-size: 0.875rem;
}

.steps li {
  border: 1px solid var(--line);
  padding: 0.25rem 0.75rem;
}

.steps li[aria-current="step"] {
  background: var(--brand-dark);
  color: #fff;
  font-weight: 700;
}

fieldset {
  border: 1px solid var(--line);
  padding: 1rem;
  margin: 0 0 1rem;
}

legend {
  font-weight: 700;
  padding: 0 0.25rem;
}

.field {
  margin-bottom: 1rem;
}

.field label {
  display: block;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.hint {
  font-size: 0.875rem;
  color: var(--ink-muted);
  margin: 0 0 0.25rem;
}

/* accessibility:color_only — required fields say "required", the asterisk is
   decorative and hidden from assistive tech. */
.req {
  color: var(--accent);
}

.usa-footer {
  border-top: 2px solid var(--brand);
  background: var(--surface-alt);
  margin-top: 2rem;
  padding: 1.5rem 0;
  font-size: 0.9375rem; /* 15px */
}

.usa-footer ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
}

.usa-footer a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.updated {
  font-size: 0.9375rem;
  color: var(--ink-muted);
}

details {
  border: 1px solid var(--line);
  padding: 0.75rem;
  margin-bottom: 0.5rem;
}

summary {
  font-weight: 700;
  cursor: pointer;
  min-height: 44px;
  display: flex;
  align-items: center;
}

/* accessibility:reduced_motion — the only transition on the site is disabled
   when the user asks for less motion. */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}

/* mobile_first_design:viewport_responsiveness — single-column below 40rem, no
   overflow, navigation stays visible. */
@media (max-width: 40rem) {
  .usa-header__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero h1 {
    font-size: 1.625rem;
  }

  .site-search input[type="search"] {
    max-width: 100%;
  }
}