:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #16161f;
  --bg-hover: #1e1e2a;
  --bg-input: #1a1a26;
  --text-primary: #e8e8f0;
  --text-secondary: #8888a0;
  --text-muted: #555570;
  --border: #2a2a3a;
  --border-light: #333348;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.15);
  --green: #10b981;
  --green-glow: rgba(16, 185, 129, 0.15);
  --red: #ef4444;
  --red-glow: rgba(239, 68, 68, 0.15);
  --yellow: #f59e0b;
  --yellow-glow: rgba(245, 158, 11, 0.15);
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow: hidden;
  height: 100vh;
}

.app {
  display: flex;
  height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 240px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 0;
  flex-shrink: 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 24px;
  margin-bottom: 32px;
}

.logo-icon {
  font-size: 28px;
  filter: drop-shadow(0 0 8px rgba(99, 102, 241, 0.5));
}

.logo-text {
  font-size: 18px;
  font-weight: 700;
  background: linear-gradient(135deg, #6366f1, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.5px;
}

.nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 12px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  text-decoration: none;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s ease;
}

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

.nav-item.active {
  color: var(--accent);
  background: var(--accent-glow);
}

.sidebar-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
  50% { opacity: 0.8; box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
}

/* Main */
.main {
  flex: 1;
  overflow-y: auto;
  padding: 32px 40px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.main::-webkit-scrollbar { width: 6px; }
.main::-webkit-scrollbar-track { background: transparent; }
.main::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.page-header {
  margin-bottom: 28px;
}

.page-header h1 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 14px;
  margin-top: 4px;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all 0.3s ease;
}

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

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
}

.stat-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: -0.2px;
}

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

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

.btn-secondary {
  background: var(--bg-hover);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--border-light);
  background: var(--border);
}

.btn-accent {
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: white;
}

.btn-accent:hover {
  box-shadow: 0 0 24px rgba(99, 102, 241, 0.4);
  transform: translateY(-1px);
}

.btn-danger {
  background: var(--red-glow);
  color: var(--red);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
  background: var(--red);
  color: white;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 16px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* Quick Actions */
.quick-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* Forms */
.form-group {
  margin-bottom: 16px;
  flex: 1;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-row {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
}

.input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  transition: all 0.2s ease;
}

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

.input::placeholder {
  color: var(--text-muted);
}

.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  cursor: pointer;
}

.checkbox-label input {
  accent-color: var(--accent);
}

/* Results */
.result-header {
  margin-bottom: 12px;
}

.result-title {
  font-size: 16px;
  font-weight: 600;
}

.result-url {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.code-block {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 13px;
  line-height: 1.6;
  max-height: 400px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text-secondary);
}

/* Sessions */
.sessions-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.sessions-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.session-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.session-item:hover {
  border-color: var(--border-light);
}

.session-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.session-id {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 13px;
  color: var(--accent);
}

.session-ua {
  font-size: 11px;
  color: var(--text-muted);
  max-width: 400px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.session-info {
  display: flex;
  align-items: center;
  gap: 16px;
}

.session-badge {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 500;
}

.session-badge.active {
  background: var(--green-glow);
  color: var(--green);
}

.empty-state {
  text-align: center;
  padding: 40px;
  color: var(--text-muted);
  font-size: 14px;
}

/* Stealth Score */
.stealth-score-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.stealth-score-ring {
  position: relative;
  width: 160px;
  height: 160px;
}

.score-svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.score-bg {
  fill: none;
  stroke: var(--border);
  stroke-width: 8;
}

.score-fg {
  fill: none;
  stroke: var(--green);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 339.292;
  stroke-dashoffset: 339.292;
  transition: stroke-dashoffset 1.5s ease;
}

.score-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 36px;
  font-weight: 700;
}

.score-meta {
  color: var(--text-secondary);
  font-size: 14px;
}

.stealth-details {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 8px;
}

.stealth-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  font-size: 13px;
  border: 1px solid var(--border);
}

.stealth-item.pass {
  border-color: rgba(16, 185, 129, 0.2);
}

.stealth-item.fail {
  border-color: rgba(239, 68, 68, 0.2);
}

.stealth-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.stealth-dot.pass {
  background: var(--green);
}

.stealth-dot.fail {
  background: var(--red);
}

/* Logs */
.log-container {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  overflow-y: auto;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 12px;
  line-height: 1.8;
}

.log-entry {
  display: flex;
  gap: 8px;
  padding: 2px 0;
  border-bottom: 1px solid rgba(42, 42, 58, 0.4);
}

.log-time {
  color: var(--text-muted);
  flex-shrink: 0;
}

.log-type {
  flex-shrink: 0;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 10px;
  padding: 1px 6px;
  border-radius: 3px;
}

.log-type.info {
  color: var(--accent);
  background: var(--accent-glow);
}

.log-type.warn {
  color: var(--yellow);
  background: var(--yellow-glow);
}

.log-type.error {
  color: var(--red);
  background: var(--red-glow);
}

.log-msg {
  color: var(--text-secondary);
  word-break: break-word;
}

/* Loading spinner */
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 0.7s linear infinite;
}

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

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    width: 60px;
    padding: 12px 0;
  }
  .logo-text, .nav-item span, .sidebar-footer span:not(.status-dot) {
    display: none;
  }
  .nav-item {
    justify-content: center;
    padding: 12px;
  }
  .logo {
    justify-content: center;
    padding: 0;
  }
  .main {
    padding: 20px;
  }
  .form-row {
    flex-direction: column;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
}