/* ConstructOne — Design Tokens & Core Styling */
:root {
  /* Color Palette - Dark Theme */
  --bg-app: #0d0f12;
  --bg-surface: #14171e;
  --bg-card: #181c24;
  --bg-card-hover: #1f242e;
  --bg-input: #11141a;
  --bg-sidebar: #12141a;
  --bg-header: #14171f;
  
  /* Borders */
  --border-subtle: #232936;
  --border-medium: #2d3546;
  --border-focus: #3b82f6;
  
  /* Brand & Status Colors */
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: rgba(37, 99, 235, 0.15);
  
  --accent-amber: #f59e0b;
  --accent-amber-hover: #d97706;
  --accent-amber-light: rgba(245, 158, 11, 0.15);
  
  --success: #10b981;
  --success-light: rgba(16, 185, 129, 0.15);
  
  --warning: #f59e0b;
  --warning-light: rgba(245, 158, 11, 0.15);
  
  --danger: #ef4444;
  --danger-light: rgba(239, 68, 68, 0.15);
  
  --info: #06b6d4;
  --info-light: rgba(6, 182, 212, 0.15);
  
  /* Typography Colors */
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  --text-inverse: #0d0f12;
  
  /* Geometry & Elevation */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 15px rgba(37, 99, 235, 0.25);
  
  /* Layout Sizing */
  --sidebar-width: 250px;
  --header-height: 64px;
  --mobile-nav-height: 60px;
  
  /* Font Families */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  height: 100%;
  background-color: var(--bg-app);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-app);
}
::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-dim);
}

/* App Shell Structure */
#app {
  display: flex;
  min-height: 100vh;
  width: 100%;
  position: relative;
  background-color: var(--bg-app);
}

/* Sidebar */
.app-sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: sticky;
  top: 0;
  z-index: 50;
  transition: transform 0.25s ease, width 0.25s ease;
  flex-shrink: 0;
}

.sidebar-header {
  padding: 1.25rem 1.25rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
}

.sidebar-brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #1e222d 0%, #171a21 100%);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-brand-icon svg {
  width: 22px;
  height: 22px;
}

.sidebar-brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.brand-version {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Navigation Menu */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-section-title {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  padding: 0.5rem 0.75rem 0.25rem;
  font-weight: 600;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: all 0.15s ease;
  position: relative;
}

.nav-item:hover {
  background-color: var(--bg-card-hover);
  color: var(--text-main);
}

.nav-item.active {
  background-color: #1e2536;
  color: #60a5fa;
  font-weight: 600;
  border-left: 3px solid var(--primary);
}

.nav-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  stroke-width: 2;
}

.nav-badge {
  margin-left: auto;
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  background-color: var(--accent-amber);
  color: #000;
  border-radius: var(--radius-full);
  font-weight: 700;
}

.sidebar-footer {
  padding: 1rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.btn-sidebar-cta {
  width: 100%;
  padding: 0.65rem;
  border-radius: var(--radius-md);
  background-color: var(--primary);
  color: #fff;
  font-weight: 600;
  font-size: 0.85rem;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: background-color 0.15s ease, transform 0.1s ease;
}

.btn-sidebar-cta:hover {
  background-color: var(--primary-hover);
}

/* Main Layout Area */
.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background-color: var(--bg-app);
}

/* Top Header */
.app-header {
  height: var(--header-height);
  background-color: var(--bg-header);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 40;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1;
  max-width: 480px;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.4rem;
  border-radius: var(--radius-sm);
}

/* Search Box */
.header-search {
  position: relative;
  width: 100%;
}

.header-search input {
  width: 100%;
  height: 38px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0 2.5rem 0 2.25rem;
  color: var(--text-main);
  font-size: 0.85rem;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.header-search input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

.header-search .search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
  pointer-events: none;
  width: 15px;
  height: 15px;
}

.header-search .search-shortcut {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.7rem;
  color: var(--text-dim);
  background: var(--bg-card);
  padding: 2px 5px;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
  pointer-events: none;
}

/* Header Right Actions */
.header-right {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

/* Sync Indicator */
.sync-status-badge {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: all 0.15s;
}

.sync-status-badge .status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.sync-online .status-dot { background-color: var(--success); box-shadow: 0 0 6px var(--success); }
.sync-offline .status-dot { background-color: var(--warning); }
.sync-syncing .status-dot { background-color: var(--primary); animation: pulse 1.2s infinite; }
.sync-pending .status-dot { background-color: var(--accent-amber); }

@keyframes pulse {
  0% { transform: scale(0.85); opacity: 0.7; }
  50% { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(0.85); opacity: 0.7; }
}

/* Header Buttons */
.header-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  transition: all 0.15s ease;
}

.header-btn:hover {
  background-color: var(--bg-card-hover);
  color: var(--text-main);
  border-color: var(--border-medium);
}

.header-btn .notification-badge {
  position: absolute;
  top: -3px;
  right: -3px;
  width: 16px;
  height: 16px;
  background-color: var(--danger);
  color: #fff;
  border-radius: 50%;
  font-size: 0.65rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--bg-header);
}

/* User Avatar Dropdown in Header */
.header-user-btn {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
  border-radius: var(--radius-md);
}

.user-avatar-badge {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-medium);
  overflow: hidden;
}

.user-avatar-badge img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Main Viewport Container */
.view-container {
  flex: 1;
  padding: 1.75rem;
  max-width: 1540px;
  width: 100%;
  margin: 0 auto;
}

/* Page Header component */
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.75rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.page-header-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.page-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.page-subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.page-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 220px;
  }
  .view-container {
    padding: 1.25rem;
  }
}

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
  }
  .app-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
  }
  .app-sidebar.sidebar-open {
    transform: translateX(0);
  }
  .sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(2px);
    z-index: 45;
    display: none;
  }
  .sidebar-backdrop.active {
    display: block;
  }
  .header-left {
    max-width: none;
  }
  .view-container {
    padding: 1rem;
  }
  .page-title {
    font-size: 1.4rem;
  }
}