/* Desktop dashboard layout: sidebar + topbar + content. Mobile overrides live in mobile.css. */

#app-shell {
  display: flex;
  width: 100%;
  min-height: 100vh;
  overflow: hidden;
}

#app-shell-inner {
  display: flex;
  width: 100%;
  flex: 1;
}

#sidebar {
  width: 250px;
  flex-shrink: 0;
  background-color: var(--bg-elevated);
  border-right: 1px solid var(--border);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  padding: 1rem 0.75rem;
  z-index: 1030;
}

#sidebar .brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.5rem 1.25rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
}

#sidebar .brand i {
  color: var(--brand);
  font-size: 1.4rem;
}

.mt-nav-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.6rem 0.75rem;
  border-radius: 0.5rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.92rem;
  margin-bottom: 0.15rem;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.mt-nav-link i {
  font-size: 1.05rem;
  width: 1.25rem;
  text-align: center;
}

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

.mt-nav-link.active {
  background-color: var(--brand);
  color: #fff;
}

#main-column {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  width: 100%;
  overflow: hidden;
}

#topbar {
  position: sticky;
  top: 0;
  z-index: 1020;
  background-color: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  padding: 0.65rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  overflow: visible;
}

#topbar .dropdown-menu {
  z-index: 1025;
}

#topbar button,
#topbar .dropdown > button {
  flex-shrink: 0;
}

#topbar #page-title {
  min-width: 0;
  flex-shrink: 1;
}

#topbar .mt-search {
  max-width: 320px;
}

#app-content {
  padding: 1.25rem;
  flex: 1;
  width: 100%;
  overflow-y: auto;
  overflow-x: hidden;
}

.mt-page-title {
  font-weight: 700;
  font-size: 1.35rem;
  margin-bottom: 1rem;
}

#bottom-nav {
  display: none;
}

#sidebar-toggle {
  display: none;
}

@media (max-width: 991.98px) {
  #sidebar {
    position: fixed;
    left: 0;
    top: 0;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    box-shadow: var(--shadow);
  }

  #sidebar.open {
    transform: translateX(0);
  }

  #sidebar-toggle {
    display: inline-flex;
  }

  #sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1025;
  }

  #sidebar-backdrop.show {
    display: block;
  }
}