/* ==========================================================================
   Base — design tokens, resets and shared building blocks.
   Both pages are embedded in an iframe, so everything is fluid and there are
   no fixed heights or viewport units.
   ========================================================================== */

:root {
  --colour-text: #001489;
  --colour-muted: #131416;
  --colour-accent: #8089c4;
  --colour-accent-dark: #404fa6;
  --colour-error: #b3251e;
  --colour-border: #d9d9d9;
  --colour-surface: #ffffff;
  --colour-surface-alt: #f5f7ff;
  --colour-focus: #0b5bd3;

  --space-3xs: 0.25rem;
  --space-2xs: 0.5rem;
  --space-xs: 0.75rem;
  --space-s: 1rem;
  --space-m: 1.5rem;
  --space-l: 2rem;
  --space-xl: 3rem;

  --radius: 4px;
  --measure: 62ch;
  --font-body: "museo-sans", system-ui, -apple-system, "Segoe UI", sans-serif;

  --transition: 0.2s ease-in-out;
}

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

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

body {
  margin: 0;
  padding: 0;
  background: var(--colour-surface);
  color: var(--colour-text);
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 1rem;
  line-height: 1.4;
}

#main {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  padding: var(--space-m);
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

img {
  max-width: 100%;
  height: auto;
}

/* Components toggle `hidden`; it has to beat the display values set below. */
[hidden] {
  display: none !important;
}

.center {
  text-align: center;
}
h1,
h2,
h3,
h4 {
  text-wrap: balance;
}
h1,
.h1 {
  font-weight: 900;
  margin: 0 0 var(--space-s);
  line-height: 1.2;
}
h2,
h3 {
  margin: 0 0 var(--space-s);
  font-weight: 700;
  line-height: 1.2;
}

h1,
.h1 {
  font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.5rem);
}
h2 {
  font-size: clamp(1.2rem, 1.1rem + 1vw, 1.44rem);
  letter-spacing: -0.01em;
}

* + h1,
* + h2,
* + h3,
* + h4 {
  margin-top: 1em;
}

strong,
b {
  font-weight: 500;
}

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

.prose > *:last-child {
  margin-bottom: 0;
}

.prose {
  max-width: var(--measure);
  margin-left: auto;
  margin-right: auto;
}

.prose ul {
  margin: 0 0 var(--space-s) var(--space-m);
  padding: 0;
  list-style-position: outside;
}
.prose ul li {
  margin: 0 0 var(--space-2xs);
}
.prose ul li:last-child {
  margin-bottom: 0;
}

.lead {
  text-align: center;
}

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

.visually-hidden:not(:focus):not(:active) {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: var(--space-s);
  top: -4rem;
  z-index: 10;
  padding: var(--space-2xs) var(--space-s);
  background: var(--colour-text);
  color: #fff;
  border-radius: var(--radius);
  transition: top 120ms ease-in-out;
}

.skip-link:focus {
  top: var(--space-s);
}

:where(a, button, input, textarea, select, [tabindex]):focus-visible {
  outline: 3px solid var(--colour-focus);
  outline-offset: 2px;
}

[tabindex="-1"]:focus {
  outline: none;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xs);
  min-height: 2.75rem;
  padding: var(--space-2xs) var(--space-m);
  border: 2px solid var(--colour-text);
  background: var(--colour-text);
  color: #fff;
  line-height: 1;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition:
    background-color var(--transition),
    border-color var(--transition),
    color var(--transition);
}

.button:hover {
  background: var(--colour-accent-dark);
  border-color: var(--colour-accent-dark);
}

.button--secondary {
  background: transparent;
  border-color: var(--colour-border);
  color: var(--colour-text);
}

.button--secondary:hover {
  background: var(--colour-surface-alt);
  border-color: var(--colour-border);
}

.button--quiet {
  min-height: 2.25rem;
  padding: var(--space-3xs) var(--space-xs);
  background: transparent;
  border-color: var(--colour-border);
  color: var(--colour-text);
  font-size: 0.9375rem;
}

.button--quiet:hover {
  background: var(--colour-surface-alt);
}

.button[disabled],
.button[aria-disabled="true"] {
  opacity: 0.45;
  cursor: not-allowed;
}

/* --------------------------------------------------------------------------
   Alerts
   -------------------------------------------------------------------------- */

.alert {
  margin: 0 0 var(--space-m);
  padding: var(--space-s);
  border-left: 4px solid var(--colour-border);
  border-radius: var(--radius);
  background: var(--colour-surface-alt);
}

.alert > *:last-child {
  margin-bottom: 0;
}

.alert--error {
  border-left-color: var(--colour-error);
  color: var(--colour-error);
}

.alert--info {
  border-left-color: var(--colour-accent);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}