:root {
  color-scheme: light;
  --text: #202020;
  --muted: #595959;
  --red: #ec0000;
  --blue: #004699;
  --blue-hover: #003677;
  --font: Arial, Helvetica, sans-serif;

  /* Local tokens for the official Amsterdam form components. */
  --ams-typography-hyphenate-limit-chars: auto;
  --ams-label-color: var(--text);
  --ams-label-font-family: var(--font);
  --ams-label-font-size: 1.125rem;
  --ams-label-font-weight: 700;
  --ams-label-line-height: 1.5;
  --ams-label-text-wrap: pretty;
  --ams-text-input-background-color: #fff;
  --ams-text-input-border-color: var(--text);
  --ams-text-input-border-radius: 0;
  --ams-text-input-border-style: solid;
  --ams-text-input-border-width: 1px;
  --ams-text-input-color: var(--text);
  --ams-text-input-font-family: var(--font);
  --ams-text-input-font-size: 1.125rem;
  --ams-text-input-font-weight: 400;
  --ams-text-input-line-height: 1.5;
  --ams-text-input-outline-offset: 3px;
  --ams-text-input-padding-block: 0.625rem;
  --ams-text-input-padding-inline: 0.75rem;
  --ams-text-input-placeholder-color: var(--muted);
  --ams-text-input-hover-box-shadow: inset 0 0 0 1px var(--text);
  --ams-text-input-disabled-background-color: #f5f5f5;
  --ams-text-input-disabled-color: var(--muted);
  --ams-text-input-disabled-cursor: not-allowed;
  --ams-text-input-invalid-border-color: var(--text);
  --ams-text-input-invalid-hover-border-color: var(--text);
  --ams-text-input-invalid-hover-box-shadow: inset 0 0 0 1px var(--text);
  --ams-button-border-radius: 0;
  --ams-button-border-style: solid;
  --ams-button-border-width: 2px;
  --ams-button-cursor: pointer;
  --ams-button-font-family: var(--font);
  --ams-button-font-size: 1.125rem;
  --ams-button-font-weight: 700;
  --ams-button-line-height: 1.5;
  --ams-button-gap: 0.5rem;
  --ams-button-outline-offset: 3px;
  --ams-button-padding-block: 0.625rem;
  --ams-button-padding-inline: 1.25rem;
  --ams-button-disabled-cursor: not-allowed;
  --ams-button-primary-background-color: var(--blue);
  --ams-button-primary-border-color: var(--blue);
  --ams-button-primary-color: #fff;
  --ams-button-primary-hover-background-color: var(--blue-hover);
  --ams-button-primary-hover-border-color: var(--blue-hover);
  --ams-button-primary-disabled-background-color: #767676;
  --ams-button-primary-disabled-border-color: #767676;
}

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

body {
  margin: 0;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: #fff;
  color: var(--text);
  font-family: var(--font);
  font-size: 1.125rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container { width: min(100% - 3rem, 1080px); margin-inline: auto; }
.site-header { border-bottom: 1px solid #e6e6e6; padding-block: 1.75rem; }
.site-brand { display: inline-flex; align-items: center; gap: 0.625rem; color: var(--red); font-size: 1.375rem; font-weight: 700; line-height: 1.15; text-decoration: none; }
.site-brand:hover { color: var(--red); }
.city-mark { font-size: 1.625rem; font-weight: 900; line-height: 0.63; }
main.container { flex: 1; padding-block: 3rem 4rem; }
.page-content { max-width: 720px; }

h1 { margin: 0 0 1.5rem; font-size: clamp(2rem, 4vw, 2.5rem); font-weight: 700; line-height: 1.2; letter-spacing: -0.025em; }
p { margin: 0; }
.lead { margin-bottom: 1rem; font-size: 1.25rem; line-height: 1.5; }
.intro { margin-bottom: 2rem; }
.subscribe { max-width: 480px; }
.field { margin-bottom: 1.5rem; }
.ams-label { margin-bottom: 0.5rem; }
.optional { font-weight: 400; color: var(--muted); }
.ams-button { margin-top: 0.5rem; }
.note { margin-top: 0.875rem; font-size: 1rem; color: var(--muted); }

/* Keep the native required-email validation, showing error colour after interaction. */
.ams-text-input:user-invalid {
  --ams-text-input-invalid-border-color: #b70000;
  --ams-text-input-invalid-hover-border-color: #b70000;
  --ams-text-input-invalid-hover-box-shadow: inset 0 0 0 1px #b70000;
}

:where(a, button, input):focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
a { color: var(--blue); text-underline-offset: 0.2em; }
a:hover { color: var(--blue-hover); }

.site-footer { padding-block: 1.5rem; background: #f5f5f5; font-size: 1rem; }
.footer-source { margin-top: 0.25rem; }
.hp { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip-link { position: fixed; top: 1rem; left: 1rem; padding: 0.75rem 1rem; background: #fff; transform: translateY(-200%); z-index: 1; }
.skip-link:focus { transform: none; }

.past-events { margin-top: 3.5rem; padding-top: 2rem; border-top: 1px solid #e6e6e6; }
.past-events, .event { scroll-margin-top: 1.5rem; }
h2 { margin: 0 0 0.5rem; font-size: clamp(1.5rem, 3vw, 1.875rem); font-weight: 700; line-height: 1.25; }
h3 { margin: 1.5rem 0 0; font-size: 1.375rem; font-weight: 700; line-height: 1.3; }
h4 { margin: 2rem 0 0.5rem; font-size: 1.125rem; font-weight: 700; line-height: 1.3; }
.event-title { margin-top: 1.25rem; }
.event-cover { display: block; width: 100%; height: auto; margin: 1.25rem 0 1rem; }
.meetup-meta { color: var(--muted); }
.meetup-intro { margin-top: 0.75rem; }
.talks { margin: 0; padding: 0; list-style: none; }
.talks > li + li { margin-top: 1.5rem; }
.talk-title { font-weight: 700; }
.talks ul { margin: 0.5rem 0 0; padding-left: 1.5rem; }
.talks ul li + li { margin-top: 0.375rem; }
.speak { margin-top: 2rem; }

.status { width: min(100% - 3rem, 720px); margin: 0 auto; padding-block: 5rem; }
.status .lead { max-width: 52ch; }
.back { display: inline-block; margin-top: 1rem; padding-block: 0.5rem; }

@media (max-width: 767px) {
  .container { width: calc(100% - 2.5rem); }
  .site-header { padding-block: 1.25rem; }
  .site-brand { font-size: 1.125rem; }
  .city-mark { font-size: 1.375rem; }
  main.container { padding-block: 2rem 3rem; }
  h1 { max-width: 20ch; }
  .lead { font-size: 1.125rem; }
  .subscribe { max-width: none; }
  .ams-button { max-width: 100%; }
  .status { width: calc(100% - 2.5rem); padding-block: 3rem; }
}