/* Background */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: url('../blueprint-bg-dark.svg');
  background-size: cover;
  background-position: center;
  opacity: 0.15;
}

/* App Shell */
.app-shell {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 260px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  background: rgba(10, 24, 32, 0.85);
  backdrop-filter: blur(20px);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 10;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px;
  border-bottom: 1px solid var(--border);
}

.sidebar-logo img {
  width: 38px;
  height: 38px;
  border-radius: 8px;
}

.sidebar-logo h1 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 2px;
  color: var(--accent);
}

.sidebar-nav {
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 14px;
  color: var(--text-muted);
  transition: all 150ms ease;
}

.nav-link:hover {
  background: var(--accent-dim);
  color: var(--text);
  text-decoration: none;
}

.nav-link.active {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--border);
}

.nav-icon {
  font-size: 16px;
  width: 20px;
  text-align: center;
}

.sidebar-section {
  padding: 16px 12px;
  border-top: 1px solid var(--border);
}

.sidebar-section-label {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--text-muted);
  margin-bottom: 8px;
  padding: 0 14px;
}

/* Main */
.main-area {
  flex: 1;
  margin-left: 260px;
  display: flex;
  flex-direction: column;
}

/* Top bar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 24, 32, 0.6);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 5;
}

.topbar-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  letter-spacing: 1.5px;
}

.topbar-meta {
  display: flex;
  align-items: center;
  gap: 14px;
}

.topbar-timestamp {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}

/* Content */
.content {
  padding: 24px 28px;
  flex: 1;
}

/* Grid helpers */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
}

/* Spacing */
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mt-16 { margin-top: 16px; }
.p-20 { padding: 20px; }

/* Responsive */
@media (max-width: 1024px) {
  .sidebar {
    width: 64px;
    overflow: hidden;
  }
  .sidebar-logo h1,
  .sidebar-section-label,
  .nav-link span:not(.nav-icon) {
    display: none;
  }
  .sidebar-logo {
    justify-content: center;
  }
  .nav-link {
    justify-content: center;
    padding: 10px;
  }
  .main-area {
    margin-left: 64px;
  }
  .sidebar-section .select-wrapper {
    display: none;
  }
}