/* Shared app shell: left sidebar + main content */
:root {
  --sidebar-w: 220px;
  --sidebar-bg: #0f172a;
  --sidebar-text: #cbd5e1;
  --sidebar-muted: #64748b;
  --sidebar-active: #14b8a6;
  --sidebar-hover: #1e293b;
}

body.app-has-nav {
  margin: 0;
  padding: 0 !important;
  min-height: 100vh;
}

.app-layout {
  display: flex;
  min-height: 100vh;
  align-items: stretch;
}

.app-sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: linear-gradient(180deg, #0f172a 0%, #111827 100%);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  padding: 1.1rem 0.75rem 1rem;
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: 40;
  border-right: 1px solid #1e293b;
}

.app-brand {
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
  color: #f8fafc;
  padding: 0.35rem 0.65rem 1rem;
  line-height: 1.25;
}

.app-brand span {
  display: block;
  font-weight: 500;
  font-size: 0.72rem;
  color: var(--sidebar-muted);
  margin-top: 0.15rem;
}

.app-nav-links {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1;
}

.app-nav-links a {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.7rem;
  border-radius: 10px;
  color: var(--sidebar-text);
  text-decoration: none;
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-size: 0.88rem;
  font-weight: 500;
}

.app-nav-links a:hover {
  background: var(--sidebar-hover);
  text-decoration: none;
  color: #f1f5f9;
}

.app-nav-links a.active {
  background: rgba(20, 184, 166, 0.15);
  color: var(--sidebar-active);
  font-weight: 600;
}

.app-nav-section {
  margin: 1rem 0.7rem 0.35rem;
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--sidebar-muted);
}

.app-nav-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.7;
  flex-shrink: 0;
}

.app-nav-foot {
  padding: 0.75rem 0.65rem 0.25rem;
  font-size: 0.72rem;
  color: var(--sidebar-muted);
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  line-height: 1.35;
}

.app-main {
  flex: 1;
  min-width: 0;
  padding: 1.25rem clamp(1rem, 2.5vw, 2rem) 2rem;
}

.app-nav-toggle {
  display: none;
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 50;
  background: var(--sidebar-bg);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 0.45rem 0.7rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
}

@media (max-width: 860px) {
  .app-nav-toggle { display: block; }
  .app-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    transform: translateX(-105%);
    transition: transform 0.2s ease;
    box-shadow: 8px 0 24px rgba(15, 23, 42, 0.25);
  }
  body.nav-open .app-sidebar { transform: translateX(0); }
  .app-main { padding-top: 3.25rem; }
}