/* Header and navigation */

.header {
  position: fixed;
  z-index: 60;
  inset: 0 0 auto;
  color: var(--color-ink);
  background: rgb(245 247 250 / 92%);
  border-bottom: 1px solid var(--color-transparent);
  backdrop-filter: blur(18px) saturate(140%);
  transition:
    background-color var(--duration-slow) var(--ease-standard),
    border-color var(--duration-slow) var(--ease-standard),
    backdrop-filter var(--duration-slow) var(--ease-standard);
}

.header.is-scrolled {
  background: rgb(255 255 255 / 88%);
  border-bottom-color: rgb(11 11 13 / 8%);
  backdrop-filter: blur(22px) saturate(180%);
}

.header__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  min-height: 80px;
  gap: var(--space-5);
}

.brand {
  display: inline-flex;
  align-items: center;
  width: max-content;
  gap: 10px;
  font-size: 24px;
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-normal);
}

.brand__mark {
  display: block;
  width: 38px;
  height: 38px;
  object-fit: contain;
}

.brand__wordmark {
  display: inline-flex;
  align-items: baseline;
  white-space: nowrap;
  line-height: 1;
}

.brand__word {
  color: var(--color-ink);
  background: linear-gradient(90deg, #02040a 0%, #f8fafd 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer .brand__mark {
  filter: invert(1);
}

.footer .brand__word {
  background: linear-gradient(90deg, #f8fafd 0%, #02040a 100%);
  background-clip: text;
  -webkit-background-clip: text;
}

.header__nav {
  display: flex;
  align-items: center;
  justify-self: center;
  gap: var(--space-5);
}

.header__nav a,
.header__login {
  color: rgb(11 11 13 / 62%);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
}

.header__nav a:hover,
.header__login:hover {
  color: var(--color-ink);
}

.header__actions {
  display: flex;
  align-items: center;
  justify-self: end;
  gap: var(--space-3);
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  padding: 12px;
  border: 1px solid rgb(11 11 13 / 12%);
  border-radius: var(--radius-sm);
}

.menu-button span {
  display: block;
  height: 1px;
  margin: 4px 0;
  background: var(--color-ink);
}

.mobile-nav {
  display: none;
}

@media (max-width: 820px) {
  .header__inner {
    grid-template-columns: 1fr auto;
  }

  .header__nav,
  .header__login {
    display: none;
  }

  .menu-button {
    display: block;
  }

  .mobile-nav {
    position: fixed;
    inset: 80px 0 0;
    display: grid;
    align-content: start;
    padding: var(--space-5);
    color: var(--color-ink);
    background: rgb(255 255 255 / 98%);
  }

  .mobile-nav[hidden] {
    display: none;
  }

  .mobile-nav a {
    padding: var(--space-5) 0;
    border-bottom: 1px solid rgb(11 11 13 / 8%);
  }
}

@media (max-width: 560px) {
  .header__inner {
    min-height: 72px;
  }

  .header__actions .button {
    display: none;
  }

  .mobile-nav {
    inset-block-start: 72px;
  }
}