/* ─── LAYOUT: Sidebar, topbar, content area ─── */

#app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ─── Sidebar ─── */
.sidebar {
  width: 230px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  z-index: 100;
  transition: transform 0.3s var(--transition);
}

.sidebar-logo {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
  color: white;
  letter-spacing: -0.5px;
  flex-shrink: 0;
}

.sidebar-logo .logo-text {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.sidebar-logo .logo-title {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text);
  line-height: 1.1;
}

.sidebar-logo .logo-sub {
  font-size: 10px;
  color: var(--text3);
  letter-spacing: 0.02em;
}

.sidebar nav {
  flex: 1;
  padding: 12px 8px;
  overflow-y: auto;
}

.nav-section {
  margin-bottom: 16px;
}

.nav-section-title {
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text3);
  padding: 4px 12px;
  margin-bottom: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--text2);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s var(--transition);
  user-select: none;
}

.nav-item:hover {
  background: rgba(255,255,255,0.04);
  color: var(--text);
}

.nav-item.active {
  background: rgba(59,130,246,0.1);
  color: var(--brand);
  font-weight: 500;
}

.nav-item .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.nav-item .count {
  margin-left: auto;
  font-size: 10px;
  font-weight: 600;
  background: var(--surface2);
  padding: 1px 7px;
  border-radius: 10px;
  color: var(--text3);
  min-width: 20px;
  text-align: center;
}

.nav-divider {
  height: 1px;
  background: var(--border);
  margin: 8px 12px;
}

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  font-size: 10px;
  color: var(--text3);
  line-height: 1.6;
  flex-shrink: 0;
}

.sidebar-user {
  padding: 10px 12px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.sidebar-user .avatar {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--surface2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--text2);
  flex-shrink: 0;
}

.sidebar-user .user-info {
  flex: 1;
  min-width: 0;
}

.sidebar-user .user-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user .user-role {
  font-size: 10px;
  color: var(--text3);
}

.sidebar-user .btn-logout {
  padding: 4px 8px;
  border-radius: 6px;
  background: rgba(248,113,113,0.1);
  border: none;
  color: var(--red);
  font-size: 10px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.15s;
  flex-shrink: 0;
}

.sidebar-user .btn-logout:hover {
  background: rgba(248,113,113,0.2);
}

/* ─── Main area ─── */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

.topbar {
  height: 52px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  flex-shrink: 0;
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 50;
}

.topbar h1 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.3px;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.topbar .status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text2);
}

.topbar .status .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}

.content {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
}

/* ─── Hamburger button (mobile) ─── */
.hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
  padding: 4px;
  line-height: 0;
}

.hamburger svg {
  width: 22px;
  height: 22px;
}

/* ─── Sidebar overlay (mobile) ─── */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 99;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.sidebar-overlay.active {
  display: block;
}

/* ─── Responsive: below 768px ─── */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    transform: translateX(-100%);
    z-index: 200;
    box-shadow: var(--shadow-lg);
  }

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

  .hamburger {
    display: block;
  }

  .content {
    padding: 16px;
  }

  .topbar {
    padding: 0 16px;
  }

  .stats {
    grid-template-columns: repeat(2, 1fr) !important;
  }

  .section {
    overflow-x: auto;
  }

  table {
    min-width: 600px;
  }
}

@media (max-width: 480px) {
  .stats {
    grid-template-columns: 1fr !important;
  }
}