/* public/css/layout.css */
/* Core Layout Grid, Navigation, and Column Hierarchy */

/* Main application container */
.app-container {
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--space-4);
  display: flex;
  flex-direction: column;
  flex: 1;
}

/* 1. Top Navigation Bar */
.top-nav {
  height: var(--header-height);
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 40;
}

.top-nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.brand-logo {
  display: block;
  width: 32px;
  height: 32px;
}

.brand-titles {
  display: flex;
  flex-direction: column;
}

.brand-wordmark {
  font-size: var(--text-base);
  font-weight: var(--font-bold);
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.1;
}

.brand-descriptor {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  font-weight: var(--font-medium);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.privacy-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  background-color: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  font-size: var(--text-xs);
  color: var(--text-secondary);
  font-weight: var(--font-medium);
}

.privacy-pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-secondary);
}

/* 2. Workspace Control Bar */
.workspace-bar {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--space-3) 0;
  margin-bottom: var(--space-6);
}

.workspace-bar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.workspace-title-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex: 1;
  min-width: 240px;
}

.workspace-title-input {
  font-size: var(--text-md);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: var(--space-1) var(--space-2);
  width: 100%;
  max-width: 320px;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.workspace-title-input:hover {
  background-color: var(--bg-surface-subtle);
  border-color: var(--border-subtle);
}

.workspace-title-input:focus {
  background-color: var(--bg-surface);
  border-color: var(--border-focus);
}

.workspace-meta-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.expiration-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--text-muted);
  font-family: var(--font-mono);
  background: var(--bg-surface-subtle);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

/* 3. Main Two-Column Content Grid */
.main-workspace-grid {
  display: grid;
  grid-template-columns: 460px 1fr;
  gap: var(--space-6);
  align-items: start;
  padding-bottom: var(--space-12);
}

.controls-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  position: sticky;
  top: calc(var(--header-height) + var(--space-4));
  max-height: calc(100vh - var(--header-height) - var(--space-8));
  overflow-y: auto;
  padding-right: var(--space-2);
}

/* Custom scrollbar for controls column */
.controls-column::-webkit-scrollbar {
  width: 6px;
}
.controls-column::-webkit-scrollbar-thumb {
  background-color: var(--border-subtle);
  border-radius: var(--radius-full);
}

.timeline-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}