.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: var(--nav-height);
  border-bottom: 1px solid color-mix(in srgb, var(--color-border) 70%, transparent);
  background: color-mix(in srgb, var(--color-bg-elevated) 84%, transparent);
  backdrop-filter: saturate(180%) blur(18px);
}

.nav {
  display: flex;
  min-height: var(--nav-height);
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 800;
}

.brand__mark,
.logo-placeholder,
.app-icon {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--color-primary) 72%, white), var(--color-primary-strong));
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.brand__mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  font-size: 0.9rem;
  overflow: hidden;
}

.brand__mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.nav__toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-elevated);
  color: var(--color-text);
}

.nav__toggle-lines,
.nav__toggle-lines::before,
.nav__toggle-lines::after {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  content: "";
}

.nav__toggle-lines {
  position: relative;
}

.nav__toggle-lines::before,
.nav__toggle-lines::after {
  position: absolute;
  left: 0;
}

.nav__toggle-lines::before {
  top: -6px;
}

.nav__toggle-lines::after {
  top: 6px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0;
  margin: 0;
  list-style: none;
}

.nav__link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  font-size: 0.95rem;
  font-weight: 650;
}

.nav__link:hover,
.nav__link.is-active {
  background: var(--color-bg-subtle);
  color: var(--color-text);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.05rem;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-weight: 750;
  line-height: 1;
  transition: transform 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button--primary {
  background: var(--color-primary);
  color: #fff;
}

.button--primary:hover {
  background: var(--color-primary-strong);
}

.button--secondary {
  border-color: var(--color-border);
  background: var(--color-bg-elevated);
  color: var(--color-text);
}

.button--text {
  min-height: auto;
  padding: 0;
  border-radius: 0;
  color: var(--color-primary);
}

.card {
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-sm);
  background: var(--color-bg-elevated);
  box-shadow: var(--shadow-sm);
}

.card--padded {
  padding: var(--space-6);
}

.app-card {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  gap: var(--space-4);
}

.app-card__head {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.app-icon {
  width: 58px;
  height: 58px;
  border-radius: 15px;
  font-weight: 800;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-bg-subtle);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  font-weight: 700;
}

.store-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: auto;
}

.store-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-text);
  color: var(--color-bg);
  font-size: 0.84rem;
  font-weight: 750;
}

.callout,
.alert {
  padding: var(--space-5);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.callout {
  background: var(--color-primary-soft);
}

.alert {
  background: var(--color-bg-subtle);
}

.toc {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-6));
  padding: var(--space-4);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-sm);
  background: var(--color-bg-elevated);
}

.toc__title {
  margin-bottom: var(--space-3);
  font-size: 0.88rem;
  font-weight: 800;
}

.toc__list {
  display: grid;
  gap: var(--space-1);
  padding: 0;
  margin: 0;
  list-style: none;
}

.toc__link {
  display: block;
  padding: 0.45rem 0.6rem;
  border-radius: var(--radius-xs);
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

.toc__link:hover,
.toc__link.is-active {
  background: var(--color-primary-soft);
  color: var(--color-primary-strong);
}

.footer {
  margin-top: auto;
  border-top: 1px solid var(--color-border-soft);
  background: var(--color-bg-elevated);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: var(--space-8);
  padding-block: var(--space-12);
}

.footer__title {
  margin-bottom: var(--space-3);
  font-weight: 800;
}

.footer__links {
  display: grid;
  gap: var(--space-2);
  padding: 0;
  margin: 0;
  list-style: none;
}

.footer__links a {
  color: var(--color-text-muted);
}

.footer__bottom {
  padding-block: var(--space-5);
  border-top: 1px solid var(--color-border-soft);
  color: var(--color-text-soft);
  font-size: 0.9rem;
}

.form {
  display: grid;
  gap: var(--space-4);
}

.form__row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.field {
  display: grid;
  gap: var(--space-2);
}

.field label {
  font-weight: 750;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-elevated);
  color: var(--color-text);
  padding: 0.85rem 0.95rem;
}

.field textarea {
  min-height: 140px;
  resize: vertical;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
}

th,
td {
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--color-border-soft);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--color-bg-subtle);
  font-size: 0.9rem;
}

tr:last-child td {
  border-bottom: 0;
}

@media (max-width: 880px) {
  .nav__toggle {
    display: inline-flex;
  }

  .nav__links {
    position: absolute;
    inset: var(--nav-height) 1rem auto 1rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg-elevated);
    box-shadow: var(--shadow-lg);
  }

  .nav__links.is-open {
    display: flex;
  }

  .nav__link {
    border-radius: var(--radius-xs);
  }

  .toc {
    position: static;
  }

  .footer__inner,
  .form__row {
    grid-template-columns: 1fr;
  }
}