/* Layout */
body { min-height: 100vh; }

.app {
  display: grid;
  grid-template-rows: auto 1fr auto;
  grid-template-columns: 280px 1fr;
  grid-template-areas:
    "top top"
    "nav main"
    "footer footer";
  min-height: 100vh;
}

header.topbar {
  grid-area: top;
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--pico-muted-border-color);
  background: var(--pico-background-color);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1rem;
  max-width: 1200px;
  margin: 0 auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  border: 1px solid var(--pico-muted-border-color);
  background: color-mix(in srgb, var(--pico-primary-background) 12%, var(--pico-background-color));
  font-weight: 700;
}

.brand span {
  font-weight: 700;
  letter-spacing: 0.2px;
}

aside.sidebar {
  grid-area: nav;
  border-right: 1px solid var(--pico-muted-border-color);
  background: color-mix(in srgb, var(--pico-background-color) 92%, var(--pico-muted-color));
}

.sidebar-inner {
  position: sticky;
  top: 64px; /* below top bar */
  padding: 1rem;
}

.navlist {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.25rem;
}

.navlist a {
  display: block;
  padding: 0.65rem 0.75rem;
  border-radius: 0.6rem;
  text-decoration: none;
  color: inherit;
  border: 1px solid transparent;
}

.navlist a[aria-current="page"],
.navlist a:hover {
  border-color: var(--pico-muted-border-color);
  background: var(--pico-card-background-color);
}

main {
  grid-area: main;
  padding: 1.25rem 1rem;
}

.main-inner {
  max-width: 1100px;
  margin: 0 auto;
}

footer {
  grid-area: footer;
  border-top: 1px solid var(--pico-muted-border-color);
  padding: 1rem;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  color: var(--pico-muted-color);
  font-size: 0.95rem;
}

/* Mobile */
@media (max-width: 900px) {
  .app {
    grid-template-columns: 1fr;
    grid-template-areas:
      "top"
      "nav"
      "main"
      "footer";
  }

  aside.sidebar {
    border-right: none;
    border-bottom: 1px solid var(--pico-muted-border-color);
  }

  .sidebar-inner {
    position: static;
  }

  .navlist {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.5rem;
  }

  .navlist a {
    text-align: center;
  }
}

/* Optional: make the whole thing feel a bit more "app-like" */
.cardish {
  border: 1px solid var(--pico-muted-border-color);
  border-radius: 1rem;
  background: var(--pico-card-background-color);
  padding: 1rem;
}