:root {
  --color-primary: #b4232f;
  --color-primary-contrast: #ffffff;
  --color-bg: #f6f7fb;
  --color-surface: #ffffff;
  --color-text: #17202a;
  --color-muted: #667085;
  --color-link: #075985;
  --color-link-hover: #b4232f;
  --color-accent: #f4b942;
  --color-border: #e4e7ec;
  --color-dark: #121a2a;
  --font-heading: "Josefin Slab", Georgia, serif;
  --font-body: "Open Sans", Arial, sans-serif;
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.65;
}

a {
  color: var(--color-link);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: color 180ms ease, opacity 180ms ease;
}

a:hover,
a:focus-visible {
  color: var(--color-link-hover);
}

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

.site-shell {
  width: min(100% - 32px, 1240px);
  margin-inline: auto;
}

.topbar {
  background: var(--color-dark);
  color: var(--color-primary-contrast);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
}

.topbar-inner {
  min-height: 38px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.topbar a {
  color: var(--color-primary-contrast);
}

.site-header {
  background: var(--color-primary);
  color: var(--color-primary-contrast);
  overflow: hidden;
  position: relative;
}

.site-header::after {
  content: "";
  width: 360px;
  height: 360px;
  border: 1px solid var(--color-primary-contrast);
  border-radius: 50%;
  position: absolute;
  right: -120px;
  top: -170px;
  opacity: 0.14;
}

.header-inner {
  padding: 46px 0 42px;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 22px;
  position: relative;
  z-index: 1;
}

.brand-mark {
  width: 66px;
  height: 66px;
  display: grid;
  place-items: center;
  border: 2px solid var(--color-primary-contrast);
  border-radius: 50%;
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
}

.site-title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: 0.02em;
}

.site-subtitle {
  max-width: 760px;
  margin: 12px 0 0;
  font-size: clamp(0.95rem, 1.7vw, 1.12rem);
  opacity: 0.94;
}

.nav {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 8px 24px rgba(18, 26, 42, 0.06);
}

.nav-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  padding: 12px 0;
}

.nav a {
  color: var(--color-text);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--color-primary);
}

.page {
  display: grid;
  grid-template-columns: minmax(190px, 0.78fr) minmax(0, 1.7fr) minmax(190px, 0.78fr);
  gap: 22px;
  align-items: start;
  padding: 34px 0 12px;
}

.stack {
  display: grid;
  gap: 18px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 12px 30px rgba(18, 26, 42, 0.06);
}

.card h2,
.card h3 {
  color: var(--color-primary);
  line-height: 1.2;
  margin: 0 0 12px;
}

.card h3 {
  font-size: 1.08rem;
}

.card p:last-child,
.card ul:last-child {
  margin-bottom: 0;
}

.small-list {
  margin: 0;
  padding-left: 18px;
}

.small-list li {
  margin-bottom: 8px;
}

.main-event {
  border-top: 6px solid var(--color-primary);
  padding: clamp(24px, 5vw, 48px);
}

.event-label {
  color: var(--color-muted);
  font-size: 0.83rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-align: center;
  text-transform: uppercase;
}

.event-title {
  color: var(--color-primary);
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5vw, 4.2rem);
  line-height: 1.02;
  margin: 6px 0 20px;
  text-align: center;
  text-transform: uppercase;
}

.event-intro {
  font-size: 1.08rem;
  margin: 0 auto;
  max-width: 700px;
  text-align: center;
}

.section-heading {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  margin: 34px 0 0;
  text-align: center;
}

.learn-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  list-style: none;
  margin: 18px 0 28px;
  padding: 0;
}

.learn-list li {
  background: color-mix(in srgb, var(--color-primary) 7%, var(--color-surface));
  border: 1px solid color-mix(in srgb, var(--color-primary) 22%, var(--color-surface));
  border-radius: var(--radius);
  color: var(--color-primary);
  font-weight: 800;
  padding: 15px 12px;
  text-align: center;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 0 0 26px;
}

.info-box {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 17px 12px;
  text-align: center;
}

.info-box strong {
  color: var(--color-dark);
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  margin-bottom: 7px;
  text-transform: uppercase;
}

.seo-note {
  background: color-mix(in srgb, var(--color-link) 5%, var(--color-surface));
  border-left: 5px solid var(--color-link);
  border-radius: var(--radius);
  color: var(--color-text);
  margin-top: 24px;
  padding: 17px 20px;
}

.button {
  background: var(--color-primary);
  border-radius: var(--radius);
  color: var(--color-primary-contrast);
  display: inline-block;
  margin-top: 8px;
  padding: 11px 16px;
  text-transform: uppercase;
}

.button:hover,
.button:focus-visible {
  color: var(--color-primary-contrast);
  opacity: 0.86;
}

.ad-image {
  display: block;
  height: auto;
  max-width: 100%;
  margin: 0 auto;
}

.footer {
  background: var(--color-dark);
  color: var(--color-primary-contrast);
  margin-top: 34px;
  padding: 30px 0;
}

.footer-inner {
  color: color-mix(in srgb, var(--color-primary-contrast) 78%, var(--color-dark));
  font-size: 0.9rem;
}

.footer strong {
  color: var(--color-primary-contrast);
}

@media (max-width: 1050px) {
  .page {
    grid-template-columns: 1fr 1.8fr;
  }

  .page>aside:last-child {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }
}

@media (max-width: 720px) {
  .site-shell {
    width: min(100% - 24px, 1240px);
  }

  .topbar-inner,
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .header-inner {
    display: flex;
  }

  .nav-inner {
    gap: 8px 16px;
  }

  .page,
  .page>aside:last-child {
    display: grid;
    grid-template-columns: 1fr;
  }

  .page>aside:last-child {
    grid-column: auto;
  }

  .info-grid,
  .learn-list {
    grid-template-columns: 1fr;
  }

  .main-event {
    padding: 24px 18px;
  }
}