/* ==========================================================================
   Design tokens
   TODO: replace the placeholder colours and fonts with the Bright Professionals
   brand values. Change them here only; everything else uses these variables.
   ========================================================================== */
:root {
  --color-primary: #1d4ed8;
  --color-primary-dark: #1e3a8a;
  --color-accent: #f59e0b;
  --color-text: #1f2937;
  --color-muted: #6b7280;
  --color-bg: #ffffff;
  --color-bg-alt: #f3f4f6;
  --color-border: #e5e7eb;

  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-heading: var(--font-body);

  --space-xs: 0.5rem;
  --space-s: 1rem;
  --space-m: 2rem;
  --space-l: 4rem;
  --space-xl: 6rem;

  --container: 72rem;
  --radius: 0.5rem;
}

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

img, picture, svg, video { display: block; max-width: 100%; height: auto; }

h1, h2, h3, h4 { font-family: var(--font-heading); line-height: 1.2; margin: 0 0 var(--space-s); }
h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 var(--space-s); }

a { color: var(--color-primary); }
a:hover { color: var(--color-primary-dark); }

:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; }

.skip-link {
  position: absolute;
  left: var(--space-s);
  top: -100%;
  padding: var(--space-xs) var(--space-s);
  background: var(--color-bg);
  z-index: 100;
}
.skip-link:focus { top: var(--space-s); }

/* Layout -------------------------------------------------------------------- */
.container { width: min(100% - 2 * var(--space-s), var(--container)); margin-inline: auto; }
.section { padding-block: var(--space-l); }
.section--alt { background: var(--color-bg-alt); }

/* Components ---------------------------------------------------------------- */
.button {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
}
.button:hover { background: var(--color-primary-dark); color: #fff; }

/* Grid: columns of equal cards, one column on phones */
.grid { display: grid; gap: var(--space-m); }
@media (min-width: 48rem) {
  .grid { grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); }
}

/* Header -------------------------------------------------------------------- */
.site-header { border-bottom: 1px solid var(--color-border); }
.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-s);
  padding-block: var(--space-s);
}
.site-header__logo { font-weight: 700; font-size: 1.25rem; color: var(--color-text); text-decoration: none; }

.nav-toggle {
  padding: var(--space-xs) var(--space-s);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: none;
  font: inherit;
  cursor: pointer;
}

.site-nav { flex-basis: 100%; display: none; }
.site-nav.is-open { display: block; }
.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: var(--space-xs); }
.site-nav a { color: var(--color-text); text-decoration: none; font-weight: 500; }
.site-nav a[aria-current="page"] { color: var(--color-primary); }

@media (min-width: 48rem) {
  .nav-toggle { display: none; }
  .site-nav { display: block; flex-basis: auto; }
  .site-nav ul { flex-direction: row; gap: var(--space-m); }
}

/* Footer -------------------------------------------------------------------- */
.site-footer {
  padding-block: var(--space-m);
  background: var(--color-bg-alt);
  color: var(--color-muted);
  font-size: 0.9375rem;
}