.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px var(--pad);
  background: rgb(255 255 255 / 96%);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.topbar h1 {
  margin: 0;
  min-width: 0;
  font-size: 1.05rem;
  overflow-wrap: anywhere;
}

.topbar-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
  max-width: 70%;
}

.home-link {
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--brand-dark);
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  white-space: nowrap;
}

.topbar h1 a {
  text-decoration: none;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: var(--pad);
  padding-bottom: 88px;
}

.page-title {
  margin: 0 0 4px;
  font-size: 1.35rem;
}

.sub {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 0.92rem;
}

.bottom-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  background: var(--surface);
  border-top: 1px solid var(--line);
  padding: 8px 6px calc(8px + env(safe-area-inset-bottom));
  z-index: 30;
}

.bottom-nav a {
  flex: 1;
  text-align: center;
  text-decoration: none;
  font-size: 0.78rem;
  color: var(--muted);
  padding: 6px 0;
}

.bottom-nav a.active {
  color: var(--brand);
  font-weight: 700;
}

.portal {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 24px;
  max-width: 480px;
  margin: 0 auto;
}

@media (max-width: 420px) {
  .topbar {
    align-items: flex-start;
    padding: 10px 12px;
  }

  .topbar-actions {
    max-width: 62%;
    gap: 5px;
  }

  .wrap {
    padding: 14px 12px 88px;
  }
}

.portal h1 {
  margin-top: 0;
}

@media (min-width: 768px) {
  :root {
    --max: 960px;
  }
}