:root {
  --v4-shell-max: 1440px;
  --v4-radius-xl: 2rem;
  --v4-radius-lg: 1.4rem;
  --v4-radius-md: 1rem;
}

.v4-body {
  min-height: 100vh;
  margin: 0;
  color: var(--brand-body-text);
  font-family: "Manrope", sans-serif;
  background:
    radial-gradient(circle at top left, color-mix(in srgb, var(--brand-primary) 26%, white 74%), transparent 32%),
    radial-gradient(circle at top right, color-mix(in srgb, var(--brand-accent) 22%, white 78%), transparent 28%),
    radial-gradient(circle at 50% 70%, color-mix(in srgb, var(--brand-secondary) 18%, white 82%), transparent 34%),
    linear-gradient(
      180deg,
      color-mix(in srgb, var(--brand-night) 18%, white 82%) 0%,
      color-mix(in srgb, var(--brand-ink) 24%, white 76%) 42%,
      color-mix(in srgb, var(--brand-secondary) 18%, white 82%) 100%
    );
}

.v4-body.no-gradients {
  background: color-mix(in srgb, var(--brand-night) 18%, white 82%);
}

.v4-app-shell {
  position: relative;
  min-height: 100vh;
  padding: 1rem;
}

.v4-app-shell__backdrop {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 15% 10%, color-mix(in srgb, var(--brand-primary) 18%, transparent), transparent 30%),
    radial-gradient(circle at 85% 0%, color-mix(in srgb, var(--brand-accent) 16%, transparent), transparent 26%),
    radial-gradient(circle at 70% 68%, color-mix(in srgb, var(--brand-secondary) 14%, transparent), transparent 30%);
  opacity: 0.95;
}

.v4-body.no-gradients .v4-app-shell__backdrop {
  display: none;
}

.v4-topbar,
.v4-page-header,
.v4-page-content {
  position: relative;
  width: min(var(--v4-shell-max), 100%);
  margin: 0 auto;
}

.v4-topbar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 0.8rem 0.9rem;
  border-radius: var(--v4-radius-xl);
  border: 1px solid color-mix(in srgb, var(--brand-primary) 10%, rgba(255, 255, 255, 0.8));
  background: color-mix(in srgb, var(--brand-header-bg, #ffffff) 82%, rgba(255, 255, 255, 0.18));
  backdrop-filter: blur(20px) saturate(120%);
  box-shadow:
    0 24px 48px rgba(15, 23, 42, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  z-index: 40;
  position: sticky;
  top: 0.75rem;
}

.v4-brandmark {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  text-decoration: none;
}

.v4-brandmark__logo {
  width: 3rem;
  height: 3rem;
  border-radius: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--brand-header-bg, #ffffff) 88%, rgba(255, 255, 255, 0.12));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--brand-primary) 10%, rgba(15, 23, 42, 0.08));
}

.v4-brandmark__logo img {
  width: 2.15rem;
  height: 2.15rem;
  object-fit: contain;
}

.v4-brandmark__text {
  display: flex;
  flex-direction: column;
}

.v4-brandmark__eyebrow {
  color: color-mix(in srgb, var(--brand-body-text) 72%, transparent);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.v4-brandmark__title {
  color: var(--brand-header-text);
  font-family: "Space Grotesk", sans-serif;
  font-size: 1rem;
  font-weight: 700;
}

.v4-topbar__nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.v4-nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2.75rem;
  padding: 0.68rem 0.95rem;
  border-radius: 999px;
  color: color-mix(in srgb, var(--brand-body-text) 82%, transparent);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 700;
  transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.v4-nav-label--short {
  display: none;
}

.v4-nav-link:hover,
.v4-nav-link.is-active {
  background: color-mix(in srgb, var(--brand-header-bg, #ffffff) 92%, rgba(255, 255, 255, 0.08));
  color: var(--brand-header-text);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.08);
}

.v4-topbar__search {
  position: relative;
  width: min(19rem, 100%);
}

.v4-search {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-height: 3rem;
  padding: 0 0.95rem;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--brand-primary) 8%, rgba(15, 23, 42, 0.08));
  background: color-mix(in srgb, var(--brand-header-bg, #ffffff) 86%, rgba(255, 255, 255, 0.14));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72);
}

.v4-search i {
  color: color-mix(in srgb, var(--brand-body-text) 58%, transparent);
}

.v4-search input {
  width: 100%;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--brand-header-text);
  font-size: 0.95rem;
}

.v4-search-results {
  position: absolute;
  top: calc(100% + 0.4rem);
  left: 0;
  right: 0;
  display: none;
  z-index: 60;
  border-radius: 1rem;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--brand-primary) 8%, rgba(15, 23, 42, 0.08));
  box-shadow: 0 24px 40px rgba(15, 23, 42, 0.12);
}

.v4-search-results.show {
  display: block;
}

.v4-page-header {
  margin-top: 1rem;
  padding: 1.35rem 0.15rem 0.5rem;
}

.v4-page-header__meta {
  color: color-mix(in srgb, var(--brand-body-text) 68%, transparent);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.v4-page-header__row {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 0.6rem;
}

.v4-page-header__copy h1 {
  margin: 0;
  color: var(--brand-header-text);
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(2rem, 4vw, 3.6rem);
  line-height: 0.94;
}

.v4-page-header__copy p {
  max-width: 64rem;
  margin: 0.7rem 0 0;
  color: color-mix(in srgb, var(--brand-body-text) 78%, transparent);
  font-size: 0.96rem;
  line-height: 1.65;
}

.v4-main {
  padding-bottom: 2rem;
}

.v4-header-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--brand-primary) 10%, rgba(15, 23, 42, 0.08));
  background: color-mix(in srgb, var(--brand-header-bg, #ffffff) 84%, rgba(255, 255, 255, 0.12));
  color: var(--brand-header-text);
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.92rem;
  font-weight: 700;
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.08);
}

.v4-header-chip--gold {
  background: linear-gradient(180deg, #ffe68b, #ffc928);
  border-color: rgba(194, 140, 0, 0.22);
  color: #5b3600;
}

.v4-page-content {
  padding-bottom: 2rem;
}

.v4-body.v4-compact-header .v4-page-content > *:first-child {
  margin-top: 0.85rem;
}

.sponsor-banner {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.85rem 1.2rem;
  border-radius: 1.15rem;
  background: var(--brand-sponsor-bg);
  color: var(--brand-sponsor-text);
  border: 1px solid color-mix(in srgb, var(--brand-primary) 12%, rgba(255, 255, 255, 0.14));
  box-shadow:
    0 18px 34px rgba(12, 18, 30, 0.18),
    0 0 0 1px rgba(255, 255, 255, 0.05) inset;
}

.sponsor-banner--split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.sponsor-banner__block,
.sponsor-banner__link {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-width: 0;
  color: inherit;
  text-decoration: none;
}

.sponsor-banner__logo {
  max-height: 52px;
  max-width: 150px;
  object-fit: contain;
  flex: 0 0 auto;
}

.sponsor-banner__text {
  min-width: 0;
}

.sponsor-banner__label {
  color: color-mix(in srgb, var(--brand-sponsor-text) 74%, transparent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.sponsor-banner__name {
  color: var(--brand-sponsor-text);
  font-family: "Space Grotesk", sans-serif;
  font-size: 1rem;
  font-weight: 700;
}

.sponsor-banner__tagline {
  color: color-mix(in srgb, var(--brand-sponsor-text) 82%, transparent);
  font-size: 0.88rem;
  line-height: 1.4;
}

.v4-flash-stack {
  width: min(var(--v4-shell-max), 100%);
  margin: 0.5rem auto 0;
}

.v4-search-results .list-group-item {
  background: rgba(255, 255, 255, 0.96);
  color: var(--brand-header-text);
  border: 0;
  border-bottom: 1px solid color-mix(in srgb, var(--brand-primary) 7%, rgba(15, 23, 42, 0.06));
}

.v4-search-results .list-group-item:last-child {
  border-bottom: 0;
}

.v4-body .modal {
  z-index: 3000;
}

.v4-body .modal-backdrop {
  z-index: 2990;
}

@media (max-width: 1100px) {
  .v4-topbar {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .v4-topbar__nav {
    justify-content: flex-start;
  }

  .v4-topbar__search {
    width: 100%;
  }
}

@media (max-width: 767.98px) {
  .v4-app-shell {
    padding: 0.75rem;
  }

  .v4-topbar {
    top: 0.45rem;
    gap: 0.75rem;
    padding: 0.78rem;
    border-radius: 1.2rem;
    justify-items: stretch;
  }

  .v4-body.v4-mobile-scrolled .v4-topbar {
    gap: 0.45rem;
    padding: 0.58rem 0.68rem;
  }

  .v4-topbar__brand {
    width: 100%;
    display: flex;
    justify-content: center;
  }

  .v4-body.v4-mobile-scrolled .v4-topbar__brand {
    display: none;
  }

  .v4-brandmark__text {
    display: none;
  }

  .v4-brandmark__logo {
    width: 2.55rem;
    height: 2.55rem;
    border-radius: 0.9rem;
  }

  .v4-topbar__nav {
    width: 100%;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 0.1rem;
    gap: 0.35rem;
    scrollbar-width: none;
  }

  .v4-topbar__nav::-webkit-scrollbar {
    display: none;
  }

  .v4-body.v4-mobile-scrolled .v4-topbar__nav {
    gap: 0.25rem;
  }

  .v4-nav-link {
    min-height: 2.35rem;
    min-width: auto;
    justify-content: center;
    padding: 0.58rem 0.72rem;
    white-space: nowrap;
    font-size: 0.8rem;
    scroll-snap-align: start;
  }

  .v4-body.v4-mobile-scrolled .v4-nav-link {
    min-height: 2.1rem;
    padding: 0.46rem 0.64rem;
  }

  .v4-nav-link i {
    margin: 0;
    font-size: 0.95rem;
  }

  .v4-nav-label--full {
    display: none;
  }

  .v4-nav-label--short {
    display: inline;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.01em;
  }

  .v4-body.v4-mobile-scrolled .v4-nav-label--short {
    font-size: 0.68rem;
  }

  .v4-body.v4-mobile-scrolled .v4-search {
    min-height: 2.55rem;
    padding: 0 0.82rem;
  }

  .v4-body.v4-mobile-scrolled .v4-search input {
    font-size: 0.9rem;
  }

  .v4-page-header {
    margin-top: 0.8rem;
    padding-top: 0.7rem;
  }

  .v4-page-header__row {
    flex-direction: column;
    align-items: start;
  }

  .v4-page-header__copy h1 {
    font-size: clamp(1.8rem, 8vw, 2.6rem);
  }

  .v4-page-header__copy p {
    font-size: 0.92rem;
    line-height: 1.55;
  }

  .v4-header-chip {
    min-height: 2.55rem;
    padding: 0.58rem 0.86rem;
    font-size: 0.82rem;
  }

  .sponsor-banner,
  .sponsor-banner__block,
  .sponsor-banner__link {
    flex-direction: column;
    align-items: flex-start;
  }

  .sponsor-banner--split {
    grid-template-columns: 1fr;
  }
}