:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #1a1a2e;
  --bg-card-hover: #1f1f35;
  --text-primary: #e8e8f0;
  --text-secondary: #a0a0b8;
  --text-muted: #6b6b80;
  --accent: #6c63ff;
  --accent-hover: #7b73ff;
  --accent-glow: rgba(108, 99, 255, 0.3);
  --positive: #22c55e;
  --negative: #ef4444;
  --neutral: #f59e0b;
  --per-color: #ff6b6b;
  --org-color: #4ecdc4;
  --loc-color: #ffd93d;
  --misc-color: #a78bfa;
  --border: #2a2a3e;
  --border-focus: #6c63ff;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --transition: all 0.2s ease;
}

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

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
}

/* Layout */
.app-container {
  min-height: 100vh;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.navbar-brand h1 {
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.navbar-brand span {
  font-size: 0.75rem;
  color: var(--text-muted);
  padding: 2px 8px;
  background: var(--bg-card);
  border-radius: 4px;
}

.navbar-links {
  display: flex;
  gap: 0.5rem;
}

.nav-link {
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition);
  border: 1px solid transparent;
}

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

.nav-link.active {
  color: var(--accent);
  background: rgba(108, 99, 255, 0.1);
  border-color: var(--accent);
}

/* Main Content */
.main-content {
  padding: 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: var(--transition);
}

.card:hover {
  border-color: var(--border-focus);
  box-shadow: var(--shadow);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.card-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Upload Area */
.upload-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  background: var(--bg-secondary);
}

.upload-area:hover {
  border-color: var(--accent);
  background: rgba(108, 99, 255, 0.05);
}

.upload-area.dragging {
  border-color: var(--accent);
  background: rgba(108, 99, 255, 0.1);
}

.upload-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.upload-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.upload-text strong {
  color: var(--accent);
}

/* Buttons */
.btn {
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}

.btn-danger {
  background: transparent;
  color: var(--negative);
  border-color: var(--negative);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.1);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8rem;
}

/* Charts/Visualization area */
.chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.chart-full {
  grid-column: 1 / -1;
}

/* Network Graph */
.network-container {
  background: var(--bg-secondary);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  min-height: 500px;
  position: relative;
  overflow: hidden;
}

.network-container canvas {
  border-radius: var(--radius);
}

/* Sentiment Chart */
.sentiment-bars {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.sentiment-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.sentiment-label {
  width: 80px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: capitalize;
}

.sentiment-bar-bg {
  flex: 1;
  height: 24px;
  background: var(--bg-secondary);
  border-radius: 12px;
  overflow: hidden;
}

.sentiment-bar {
  height: 100%;
  border-radius: 12px;
  transition: width 0.5s ease;
}

.sentiment-bar.positive { background: var(--positive); }
.sentiment-bar.negative { background: var(--negative); }
.sentiment-bar.neutral { background: var(--neutral); }

.sentiment-count {
  width: 50px;
  text-align: right;
  font-size: 0.85rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* Entity Tags */
.entity-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.entity-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid;
}

.entity-tag.PER { color: var(--per-color); border-color: var(--per-color); background: rgba(255, 107, 107, 0.1); }
.entity-tag.ORG { color: var(--org-color); border-color: var(--org-color); background: rgba(78, 205, 196, 0.1); }
.entity-tag.LOC { color: var(--loc-color); border-color: var(--loc-color); background: rgba(255, 217, 61, 0.1); }
.entity-tag.MISC { color: var(--misc-color); border-color: var(--misc-color); background: rgba(167, 139, 250, 0.1); }

.entity-count {
  background: rgba(255, 255, 255, 0.15);
  padding: 0 6px;
  border-radius: 10px;
  font-size: 0.7rem;
}

/* Data Table */
.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.data-table tr:hover td {
  background: var(--bg-card-hover);
}

/* Insights */
.insights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
}

.insight-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  border-left: 3px solid;
}

.insight-card.complaint { border-left-color: var(--negative); }
.insight-card.compliment { border-left-color: var(--positive); }
.insight-card.hot_issue { border-left-color: var(--neutral); }
.insight-card.important { border-left-color: var(--accent); }

.insight-title {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.35rem;
}

.insight-description {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Admin */
.admin-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-input {
  width: 100%;
  padding: 0.625rem 0.875rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.875rem;
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Loading */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 2rem;
  color: var(--text-muted);
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top: 2px solid var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 768px) {
  .chart-grid { grid-template-columns: 1fr; }
  .admin-grid { grid-template-columns: 1fr; }
  .main-content { padding: 1rem; }
  .navbar { padding: 0.75rem 1rem; }
}

/* Text input area */
.text-input-area {
  width: 100%;
  min-height: 120px;
  padding: 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-family: inherit;
  resize: vertical;
  transition: var(--transition);
}

.text-input-area:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: 12px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
}

.badge-positive { background: rgba(34, 197, 94, 0.15); color: var(--positive); }
.badge-negative { background: rgba(239, 68, 68, 0.15); color: var(--negative); }
.badge-neutral { background: rgba(245, 158, 11, 0.15); color: var(--neutral); }

/* Tab navigation */
.tabs {
  display: flex;
  gap: 0;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.tab {
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  font-weight: 500;
}

.tab:hover { color: var(--text-primary); }
.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}