/* Sidebar & Layout Engine */
:root {
  --sidebar-width: 260px;
  --topbar-height: 80px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.app-container {
  display: flex;
  min-height: 100dvh;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-card);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: var(--transition);
}

.sidebar-header {
  padding: 32px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-name {
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.5px;
}

.brand-name span {
  color: var(--accent-blue);
}

.nav-links {
  flex: 1;
  padding: 0 12px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 4px;
  transition: var(--transition);
}

.nav-item:hover {
  background: var(--bg-elevated);
  color: #fff;
}

.nav-item.active {
  background: rgba(59, 130, 246, 0.1);
  color: var(--accent-blue);
  font-weight: 600;
}

.sidebar-footer {
  padding: 24px;
  border-top: 1px solid var(--border-subtle);
}

/* Content Area */
.content {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--bg-main);
  height: 100dvh;
  overflow: hidden;
}

.top-bar {
  height: var(--topbar-height);
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
}

.view-viewport {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 40px;
}

.view-viewport-logs {
  display: flex !important;
  flex-direction: column !important;
  overflow: hidden !important;
}

/* Hamburger Controls */
.hamburger-open, .hamburger-close {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 24px;
  cursor: pointer;
}

@media (max-width: 1024px) {
  .sidebar {
    position: fixed;
    left: calc(-1 * var(--sidebar-width));
    height: 100%;
  }
  
  .sidebar.open {
    left: 0;
    box-shadow: 20px 0 50px rgba(0,0,0,0.5);
  }

  .hamburger-open, .hamburger-close {
    display: block;
  }
  
  .top-bar { padding: 0 16px; }
  
  .view-viewport { padding: 20px; }
}

@media (max-width: 768px) {
  .top-bar {
    height: auto;
    min-height: 56px;
    flex-wrap: wrap;
    gap: 6px;
  }

  .view-title h2 {
    font-size: 14px;
  }
}