:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #141414;
  --bg-tertiary: #1e1e1e;
  --text-primary: #e5e5e5;
  --text-secondary: #a3a3a3;
  --text-muted: #737373;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --border: #262626;
  --radius: 8px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

header h1 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

header p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

nav {
  margin-bottom: 2rem;
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
}

nav a {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius);
  font-size: 0.875rem;
  transition: all 0.2s;
  border: 1px solid var(--border);
}

nav a:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

nav a.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card h3 {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
  color: var(--text-secondary);
}

.status-indicator {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-muted);
}

.status-indicator.loading {
  background: var(--warning);
  animation: pulse 1s infinite;
}

.status-indicator.success {
  background: var(--success);
}

.status-indicator.error {
  background: var(--danger);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.data-row {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}

.data-row:last-child {
  border-bottom: none;
}

.data-label {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.data-value {
  font-weight: 500;
  text-align: right;
  max-width: 60%;
  word-break: break-all;
}

.data-value.highlight {
  color: var(--accent);
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.badge.human {
  background: rgba(34, 197, 94, 0.15);
  color: var(--success);
}

.badge.bot {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
}

.badge.suspicious {
  background: rgba(245, 158, 11, 0.15);
  color: var(--warning);
}

.badge.unknown {
  background: rgba(163, 163, 163, 0.15);
  color: var(--text-secondary);
}

.confidence-bar {
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 0.5rem;
}

.confidence-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.5s ease;
}

.confidence-fill.high {
  background: var(--success);
}

.confidence-fill.medium {
  background: var(--warning);
}

.confidence-fill.low {
  background: var(--danger);
}

.json-output {
  background: var(--bg-tertiary);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
  font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
  font-size: 0.8rem;
  line-height: 1.5;
  max-height: 400px;
  overflow-y: auto;
}

.json-output pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-all;
}

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

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}

.btn:hover {
  background: var(--accent-hover);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.signals-list {
  list-style: none;
}

.signals-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
}

.signals-list li:last-child {
  border-bottom: none;
}

.signal-type {
  color: var(--warning);
  font-weight: 500;
}

.tabs {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.tab {
  padding: 0.75rem 1rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.875rem;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all 0.2s;
}

.tab:hover {
  color: var(--text-primary);
}

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

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

@media (max-width: 768px) {
  .container {
    padding: 1rem;
  }

  .result-grid {
    grid-template-columns: 1fr;
  }

  nav ul {
    flex-direction: column;
  }

  nav a {
    display: block;
    text-align: center;
  }
}