/* App Shell Layout */
.pco-app {
  min-height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

/* Top bar */
.pco-topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--pco-border);
}

.pco-topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--pco-3) 0;
}

.pco-brand { display: flex; align-items: center; gap: var(--pco-3); }

.pco-brand-badge {
  width: 40px;
  height: 40px;
  border-radius: var(--pco-radius-md);
  background: var(--pco-primary);
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: var(--pco-weight-bold);
}

.pco-brand-title { font-weight: var(--pco-weight-bold); }
.pco-brand-sub { font-size: var(--pco-text-sm); color: var(--pco-muted); margin-top: 2px; }

/* Main */
.pco-main { padding: var(--pco-4) 0 var(--pco-10); }

/* Quick Actions */
.pco-quick {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: var(--pco-3);
}
@media (max-width: 420px) { .pco-quick { grid-template-columns: 1fr; } }

.pco-quick a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--pco-4);
  border-radius: var(--pco-radius-lg);
  border: 1px solid var(--pco-border);
  background: #fff;
  box-shadow: var(--pco-shadow-sm);
}
.pco-quick strong { font-weight: var(--pco-weight-semibold); }
.pco-quick span { color: var(--pco-muted); font-size: var(--pco-text-sm); }

/* Bottom nav (mobile-first) */
.pco-bottomnav {
  position: sticky;
  bottom: 0;
  z-index: 60;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--pco-border);
}

.pco-bottomnav-inner {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--pco-2);
  padding: var(--pco-2) 0;
}

.pco-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 0.45rem 0.25rem;
  border-radius: var(--pco-radius-md);
  color: var(--pco-muted);
  font-size: var(--pco-text-xs);
  font-weight: var(--pco-weight-medium);
}
.pco-tab.is-active {
  color: var(--pco-primary);
  background: rgba(63,159,207,0.10);
}

.pco-dot {
  width: 6px; height: 6px; border-radius: 999px;
  background: var(--pco-accent);
  display: inline-block;
}

/* Dark-mode glass surfaces for bars */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .pco-topbar {
    background: rgba(15,26,43,0.78);
    border-bottom-color: var(--pco-border);
  }
  :root:not([data-theme="light"]) .pco-bottomnav {
    background: rgba(15,26,43,0.78);
    border-top-color: var(--pco-border);
  }
}

:root[data-theme="dark"] .pco-topbar {
  background: rgba(15,26,43,0.78);
  border-bottom-color: var(--pco-border);
}
:root[data-theme="dark"] .pco-bottomnav {
  background: rgba(15,26,43,0.78);
  border-top-color: var(--pco-border);
}