body::before,
body::after {
  content: '';
  position: fixed;
  inset-inline-start: 50%;
  width: min(84vw, 980px);
  height: min(84vw, 980px);
  transform: translateX(-50%);
  pointer-events: none;
  z-index: 0;
}

body::before {
  top: -54%;
  background: radial-gradient(circle at center, rgba(124, 58, 237, 0.12), rgba(124, 58, 237, 0));
  filter: blur(12px);
}

body::after {
  bottom: -60%;
  background: radial-gradient(circle at center, rgba(14, 165, 233, 0.08), rgba(14, 165, 233, 0));
  filter: blur(22px);
}

.container {
  width: min(1200px, 100% - 3rem);
  margin-inline: auto;
}

.section {
  padding-block: 5rem;
}

.header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 60;
  transition: background-color var(--transition-soft), border-color var(--transition-soft), box-shadow var(--transition-soft);
}

.header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(252, 252, 255, 0);
  backdrop-filter: blur(0);
  transition: background var(--transition-soft), backdrop-filter var(--transition-soft);
  z-index: -1;
}

.header--scrolled::before,
.header--menu-open::before {
  background: rgba(252, 252, 255, 0.92);
  backdrop-filter: blur(10px);
}

.header--scrolled,
.header--menu-open {
  border-bottom: 1px solid rgba(229, 231, 235, 0.82);
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.04);
}

.header__inner {
  min-height: var(--header-height);
  display: grid;
  grid-template-columns: auto auto;
  align-items: center;
  gap: 0.8rem;
  padding-block: 0.65rem;
}

.header__logo {
  justify-self: start;
  font-size: 1.28rem;
  letter-spacing: 0.02em;
  font-weight: 700;
  color: var(--color-primary);
}

.header__toggle {
  justify-self: end;
  inline-size: 44px;
  block-size: 44px;
  border: 1px solid rgba(124, 58, 237, 0.24);
  border-radius: 12px;
  display: grid;
  place-content: center;
  gap: 0.28rem;
  cursor: pointer;
}

.header__toggle-line {
  inline-size: 20px;
  block-size: 2px;
  background: var(--color-primary);
  border-radius: 5px;
  transform-origin: center;
  transition: transform var(--transition-soft), opacity var(--transition-soft);
}

.header--menu-open .header__toggle-line:nth-child(1) {
  transform: translateY(6px) rotate(-45deg);
}

.header--menu-open .header__toggle-line:nth-child(2) {
  opacity: 0;
}

.header--menu-open .header__toggle-line:nth-child(3) {
  transform: translateY(-6px) rotate(45deg);
}

.header__nav {
  grid-column: 1 / -1;
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--transition-soft);
}

.header--menu-open .header__nav {
  grid-template-rows: 1fr;
}

.header__nav-list {
  overflow: hidden;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(229, 231, 235, 0.9);
  border-radius: 14px;
  padding: 0.35rem;
  display: grid;
  gap: 0.2rem;
}

.header__nav-link {
  display: block;
  padding: 0.72rem 0.9rem;
  border-radius: 10px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  transition: color var(--transition-soft), background-color var(--transition-soft);
}

.header__nav-link:hover,
.header__nav-link:focus-visible,
.header__nav-link--active {
  color: var(--color-text-main);
  background: var(--color-primary-soft);
}

.header__cta {
  display: none;
}

main {
  padding-block-start: calc(var(--header-height) + 0.8rem);
}

@media (min-width: 30rem) {
  .container {
    width: min(1200px, 100% - 4rem);
  }
}

@media (min-width: 48rem) {
  :root {
    --header-height: 76px;
  }

  .section {
    padding-block: 6rem;
  }

  .header__inner {
    grid-template-columns: auto 1fr auto;
    gap: 1rem;
  }

  .header__toggle {
    display: none;
  }

  .header__nav {
    grid-column: auto;
    grid-template-rows: 1fr;
    justify-self: center;
    width: 100%;
  }

  .header__nav-list {
    display: flex;
    justify-content: center;
    gap: 0.35rem;
    border: 0;
    background: transparent;
    padding: 0;
    border-radius: 0;
  }

  .header__nav-link {
    position: relative;
    background: transparent;
    padding-block: 0.58rem;
    padding-inline: 0.82rem;
  }

  .header__nav-link::after {
    content: '';
    position: absolute;
    inset-block-end: 3px;
    inset-inline: 0.82rem;
    block-size: 2px;
    border-radius: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform var(--transition-soft);
  }

  .header__nav-link:hover::after,
  .header__nav-link:focus-visible::after,
  .header__nav-link--active::after {
    transform: scaleX(1);
  }

  .header__cta {
    display: inline-flex;
    justify-self: end;
  }

  main {
    padding-block-start: calc(var(--header-height) + 1.1rem);
  }
}

@media (min-width: 64rem) {
  .container {
    width: min(1200px, 100% - 6rem);
  }

  .section {
    padding-block: 7rem;
  }
}