/* ============================================
   PAJARA OS — Shell Layout
   ============================================ */

/* ── App Shell Grid ── */
#app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: 100vh;
  transition: grid-template-columns var(--transition);
}
#app-shell.sidebar-collapsed {
  grid-template-columns: var(--sidebar-collapsed) 1fr;
}

/* ── Sidebar ── */
.sidebar {
  background: var(--surface-container-lowest);
  border-right: 1px solid var(--outline-variant);
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: sticky;
  top: 0;
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 100;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 20px 16px;
}
.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  background: var(--primary);
  color: var(--on-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  flex-shrink: 0;
}
.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--on-surface);
  display: block;
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  display: block;
}

/* ── Sidebar Nav ── */
.sidebar-nav {
  flex: 1;
  padding: 8px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--on-surface-variant);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}
.sidebar-link:hover {
  background: var(--surface-container-low);
  color: var(--on-surface);
}
.sidebar-link.active {
  background: var(--surface-container);
  color: var(--primary);
  font-weight: 600;
  border-left: 3px solid var(--primary);
  padding-left: 9px;
}
.sidebar-link svg {
  flex-shrink: 0;
  opacity: 0.7;
}
.sidebar-link.active svg { opacity: 1; }

.sidebar-separator {
  height: 1px;
  background: var(--outline-variant);
  margin: 8px 12px;
}

/* ── Sidebar Footer ── */
.sidebar-footer {
  padding: 12px;
  border-top: 1px solid var(--outline-variant);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.sidebar-ai-btn {
  margin-bottom: 8px;
  justify-content: center;
  width: 100%;
  border-radius: var(--radius-lg);
}
.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 8px;
  margin-bottom: 4px;
}
.user-info { overflow: hidden; }
.user-name {
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.user-role {
  font-size: 11px;
  color: var(--on-surface-variant);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-family: var(--font-mono);
}

/* ── Main Wrapper ── */
.main-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--surface);
}

/* ── Topbar ── */
.topbar {
  height: var(--topbar-height);
  background: var(--surface-container-lowest);
  border-bottom: 1px solid var(--outline-variant);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 50;
}
.search-bar {
  flex: 1;
  max-width: 480px;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface-container-low);
  border-radius: var(--radius-full);
  padding: 8px 16px;
}
.search-bar svg { color: var(--outline); flex-shrink: 0; }
.search-bar input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--on-surface);
}
.search-bar input::placeholder { color: var(--outline); }

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}
.btn-icon {
  position: relative;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  border: none;
  background: none;
  cursor: pointer;
  color: var(--on-surface-variant);
  transition: background var(--transition-fast);
}
.btn-icon:hover { background: var(--surface-container); }

.notification-dot {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--error);
}

.topbar-user {
  text-align: right;
  margin-left: 8px;
}
.topbar-user-name {
  display: block;
  font-size: 13px;
  font-weight: 600;
}
.topbar-user-role {
  display: block;
  font-size: 10px;
  color: var(--on-surface-variant);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-family: var(--font-mono);
}

/* ── Module Container ── */
.module-container {
  flex: 1;
  padding: var(--space-md) var(--margin-desktop);
  max-width: var(--container-max);
}
.module-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 50vh;
}

/* ── Module Page Header ── */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-md);
}
.page-header-left { flex: 1; }
.page-subtitle {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  margin-bottom: 4px;
}
.page-title {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: var(--on-surface);
  line-height: 1.2;
}
.page-desc {
  color: var(--on-surface-variant);
  font-size: 14px;
  margin-top: 4px;
}
.page-header-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

/* ── Access Denied ── */
.access-denied {
  text-align: center;
  padding: 80px 24px;
}
.access-denied svg { opacity: 0.3; margin-bottom: 16px; }
.access-denied h2 { margin-bottom: 8px; }

/* ── Mobile ── */
@media (max-width: 768px) {
  #app-shell { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    left: -280px;
    width: 280px;
    transition: left var(--transition);
    z-index: 200;
  }
  .sidebar.open { left: 0; }
  .sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.3);
    z-index: 199;
    display: none;
  }
  .sidebar-overlay.active { display: block; }
  .topbar { padding: 0 16px; }
  .module-container { padding: var(--space-sm) var(--margin-mobile); }
  .topbar-user { display: none; }
  .page-header { flex-direction: column; gap: 12px; }
  .page-title { font-size: 24px; }
}

/* ── Collapsed Sidebar ── */
.sidebar-collapsed .sidebar .brand-text,
.sidebar-collapsed .sidebar .sidebar-link span,
.sidebar-collapsed .sidebar .user-info,
.sidebar-collapsed .sidebar .sidebar-ai-btn span {
  display: none;
}
.sidebar-collapsed .sidebar { width: var(--sidebar-collapsed); }
.sidebar-collapsed .sidebar-brand { justify-content: center; padding: 20px 8px 16px; }
.sidebar-collapsed .sidebar-link { justify-content: center; padding: 10px; }
.sidebar-collapsed .sidebar-ai-btn { padding: 10px; }