/* EnrollFalcon Navigation - $10B Company Design */

:root {
  --sidebar-width: 240px;
  --sidebar-collapsed-width: 64px;

  /* Monochromatic scale - Professional gray palette */
  --gray-50: #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #e5e5e5;
  --gray-300: #d4d4d4;
  --gray-400: #a3a3a3;
  --gray-500: #737373;
  --gray-600: #525252;
  --gray-700: #404040;
  --gray-800: #262626;
  --gray-900: #171717;

  /* Brand accent - Single color */
  --accent-500: #667eea;
  --accent-600: #5568d3;

  /* Spacing - 8px grid system */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Courier New', monospace;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.5;
  color: var(--gray-900);
  background: var(--gray-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.app-container {
  display: flex;
  min-height: 100vh;
}

/* ===== SIDEBAR ===== */
.sidebar {
  width: var(--sidebar-width);
  height: 100vh;
  background: #ffffff;
  border-right: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  overflow-y: auto;
  overflow-x: hidden;
  box-shadow: 1px 0 0 0 rgba(0, 0, 0, 0.02);
  transition: width 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed-width);
}

.sidebar.collapsed .sidebar-brand span,
.sidebar.collapsed .sidebar-section,
.sidebar.collapsed .sidebar-divider,
.sidebar.collapsed .sidebar-upload-btn span,
.sidebar.collapsed .sidebar-user-name,
.sidebar.collapsed .nav-label {
  display: none;
}

.sidebar.collapsed .sidebar-brand {
  justify-content: center;
  padding: var(--space-6) var(--space-2);
}

.sidebar.collapsed .sidebar-upload-btn {
  width: 40px;
  height: 40px;
  margin: var(--space-2) auto;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar.collapsed .sidebar-nav {
  align-items: center;
  padding: var(--space-2);
}

.sidebar.collapsed .sidebar-nav-item {
  width: 40px;
  height: 40px;
  padding: 0;
  margin: 0 auto;
  margin-bottom: var(--space-1);
  justify-content: center;
  border-left: none !important;
  border-radius: 8px;
  background: transparent;
}

.sidebar.collapsed .sidebar-nav-item.active {
  background: var(--accent-500);
  color: white;
  border-left: none !important;
}

.sidebar.collapsed .sidebar-nav-item:hover {
  border-left: none !important;
}

.sidebar.collapsed .sidebar-user {
  width: 40px;
  height: 40px;
  padding: 0;
  margin: var(--space-2) auto;
  justify-content: center;
  border: none;
  border-radius: 8px;
}

.sidebar::-webkit-scrollbar {
  width: 4px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--gray-300);
  border-radius: 2px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
  background: var(--gray-400);
}

/* ===== BRAND ===== */
.sidebar-brand {
  padding: var(--space-6) var(--space-4);
  font-size: 16px;
  font-weight: 600;
  color: var(--gray-900);
  border-bottom: 1px solid var(--gray-200);
  font-family: var(--font-sans);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  position: relative;
}

.sidebar-brand img {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.sidebar-brand span {
  white-space: nowrap;
  transition: opacity var(--transition-base);
}

.sidebar-toggle {
  position: absolute;
  right: var(--space-4);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: 4px;
  transition: all var(--transition-base);
  color: var(--gray-500);
}

.sidebar-toggle:hover {
  background: var(--gray-100);
  color: var(--gray-900);
}

.sidebar.collapsed .sidebar-toggle {
  right: 50%;
  transform: translateX(50%) rotate(180deg);
}

/* ===== PRIMARY ACTION ===== */
.sidebar-upload-btn {
  margin: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: var(--accent-500);
  color: #ffffff;
  text-align: center;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  transition: all var(--transition-base);
  border: none;
  box-shadow: 0 1px 2px rgba(102, 126, 234, 0.2);
}

.sidebar-upload-btn svg {
  flex-shrink: 0;
}

.sidebar-upload-btn:hover {
  background: var(--accent-600);
  box-shadow: 0 2px 4px rgba(102, 126, 234, 0.3);
  transform: translateY(-1px);
}

.sidebar-upload-btn:active {
  transform: scale(0.98);
}

/* ===== SECTIONS ===== */
.sidebar-section {
  padding: var(--space-4);
  border-bottom: 1px solid var(--gray-200);
}

.sidebar-section-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-500);
  margin-bottom: var(--space-3);
}

/* ===== ATTENTION / TRIAGE ===== */
.sidebar-attention {
  background: linear-gradient(135deg, rgba(251, 146, 60, 0.15) 0%, rgba(249, 115, 22, 0.1) 100%);
  border: 1px solid rgba(251, 146, 60, 0.3);
  border-radius: 8px;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  cursor: pointer;
  transition: all var(--transition-base);
}

.sidebar-attention:hover {
  background: linear-gradient(135deg, rgba(251, 146, 60, 0.25) 0%, rgba(249, 115, 22, 0.2) 100%);
  border-color: rgba(251, 146, 60, 0.5);
  transform: translateY(-1px);
}

.sidebar-attention-count {
  font-size: 28px;
  font-weight: 700;
  color: #ea580c;
  font-family: var(--font-mono);
  letter-spacing: -0.03em;
  line-height: 1;
}

.sidebar-attention-label {
  font-size: 12px;
  color: #c2410c;
  font-weight: 500;
}

/* ===== RECENT FILES ===== */
.sidebar-recent-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  font-size: 12px;
  cursor: pointer;
  transition: opacity var(--transition-fast);
}

.sidebar-recent-item:hover {
  opacity: 0.7;
}

.sidebar-recent-name {
  flex: 1;
  color: var(--gray-700);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-recent-status {
  font-size: 12px;
}

.sidebar-recent-status.success {
  color: var(--gray-500);
}

.sidebar-recent-status.warning {
  color: var(--gray-700);
}

.sidebar-recent-time {
  font-size: 11px;
  color: var(--gray-500);
  font-family: var(--font-mono);
}

/* ===== DIVIDER ===== */
.sidebar-divider {
  height: 1px;
  background: var(--gray-200);
  margin: var(--space-4) var(--space-4);
}

/* ===== NAVIGATION ===== */
.sidebar-nav {
  flex: 1;
  padding: var(--space-2) var(--space-2);
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.sidebar-nav-item {
  padding: var(--space-2) var(--space-3);
  color: var(--gray-600);
  text-decoration: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  position: relative;
  border-left: 2px solid transparent;
  margin-left: var(--space-2);
  white-space: nowrap;
}

.sidebar-nav-item svg {
  flex-shrink: 0;
}

.sidebar-nav-item:hover {
  background: var(--gray-100);
  color: var(--gray-900);
  border-left-color: var(--gray-300);
}

.sidebar-nav-item.active {
  background: linear-gradient(90deg, #f5f3ff 0%, #fafafa 100%);
  color: var(--accent-600);
  font-weight: 600;
  border-left-color: var(--accent-500);
}

/* ===== USER / LOGOUT ===== */
.sidebar-user {
  padding: var(--space-4);
  border-top: 1px solid var(--gray-200);
  cursor: pointer;
  transition: all var(--transition-base);
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  border-radius: 6px;
  margin: var(--space-2);
  margin-top: auto;
}

.sidebar-user:hover {
  background: #fef2f2;
  border-top-color: #fecaca;
}

.sidebar-user-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #dc2626;
  flex-shrink: 0;
}

.sidebar-user-name {
  font-size: 12px;
  color: #dc2626;
  font-weight: 600;
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: opacity var(--transition-base);
}

/* ===== STATUS DOT ===== */
.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-dot.success {
  background: #10b981;
}

.status-dot.warning {
  background: #f59e0b;
}

/* ===== MAIN CONTENT ===== */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  background: var(--gray-50);
  transition: margin-left 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

sidebar-nav[data-collapsed="true"] ~ .main-content {
  margin-left: var(--sidebar-collapsed-width);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    position: relative;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--gray-200);
  }

  .main-content {
    margin-left: 0;
  }
}