.hub-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.hub-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--surface-card);
  border-bottom: var(--bw-bold) solid var(--border-strong);
}

.hub-header__inner {
  width: min(100%, var(--container-max));
  margin: 0 auto;
  min-height: 58px;
  padding: 0 var(--container-pad);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.hub-brand {
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: 10px;
  color: var(--text-strong);
  text-decoration: none;
  white-space: nowrap;
}

.hub-brand__mark,
.hub-mark {
  width: 30px;
  height: 30px;
  display: inline-block;
  flex: none;
  background: var(--text-strong);
  -webkit-mask: var(--hub-mark-url) center / contain no-repeat;
  mask: var(--hub-mark-url) center / contain no-repeat;
}

.hub-brand__word {
  font: var(--fw-bold) 18px / 1 var(--font-display);
  letter-spacing: 0;
}

.hub-brand__word b {
  color: var(--accent);
  font-weight: 800;
}

.hub-header__right {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  min-width: 0;
}

.hub-nav-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 34px;
  padding: 0 12px;
  border-radius: var(--r-sm);
  color: var(--text-muted);
  text-decoration: none;
  white-space: nowrap;
  font: var(--fw-semibold) 13px / 1 var(--font-body);
}

.hub-nav-link:hover {
  color: var(--text-strong);
  background: var(--bg-sunken);
}

.hub-nav-link.is-primary {
  color: var(--text-on-accent);
  background: var(--accent);
  border: var(--bw-bold) solid var(--border-strong);
  box-shadow: var(--shadow-hard);
}

.hub-nav-link.is-primary:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0 var(--ink-900);
}

.hub-main {
  flex: 1;
  width: min(100%, 960px);
  margin: 0 auto;
  padding: 1.5rem;
}

.hub-main--wide,
.hub-main--flush {
  width: 100%;
  max-width: none;
  padding: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 38px;
  padding: 0 1rem;
  border-radius: var(--r-sm);
  font: var(--fw-semibold) 0.875rem / 1 var(--font-body);
  text-decoration: none;
  cursor: pointer;
  border: var(--bw-bold) solid var(--border-strong);
  background: var(--surface-card);
  color: var(--text-strong);
}

.btn-primary {
  background: var(--accent);
  color: var(--text-on-accent);
  box-shadow: var(--shadow-hard);
}

.btn-primary:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0 var(--ink-900);
}

@media (max-width: 640px) {
  .hub-header__inner {
    padding: var(--space-2) var(--space-4);
  }

  .hub-header__right {
    justify-content: flex-start;
  }

  .hub-nav-link {
    min-height: var(--control-h-lg);
  }

  .hub-brand__word {
    font-size: 16px;
  }

  .hub-main {
    padding: 1rem 0.75rem;
  }

  .hub-main--wide,
  .hub-main--flush {
    padding: 0;
  }
}