:root {
  /* Color Palette - Industrial / High-Tech Dark Theme */
  --bg-dark: #0f1115;
  --bg-card: #1a1d23;
  --bg-sidebar: #14161a;
  --accent-primary: #3b82f6; /* Electric Blue */
  --accent-secondary: #10b981; /* Success Green */
  --accent-warning: #f59e0b; /* Amber */
  --text-main: #e2e8f0;
  --text-muted: #94a3b8;
  --border-color: #2d333b;
  --terminal-bg: #050505;
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Typography */
  --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'Cascadia Code', 'Fira Code', monospace;
}

* {
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-main);
  height: 100vh;
  display: flex;
  overflow: hidden;
}

/* Layout Structure */
.app-container {
  display: flex;
  width: 100vw;
  height: 100vh;
}

.sidebar {
  width: 260px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: var(--space-lg);
}

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  background-image: radial-gradient(circle at 50% 50%, #1a1d23 0%, #0f1115 100%);
}

/* Sidebar Elements */
.logo-container {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-2xl);
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: var(--accent-primary);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  text-decoration: none;
  color: var(--text-muted);
  border-radius: 8px;
  transition: all 0.2s ease;
  font-weight: 500;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}

.nav-item.active {
  background: rgba(59, 130, 246, 0.1);
  color: var(--accent-primary);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

/* Header Area */
.app-header {
  padding: var(--space-lg) var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
}

.page-title h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
}

.page-title p {
  margin: var(--space-xs) 0 0 0;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Grid System */
.content-grid {
  padding: var(--space-xl);
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-xl);
}

.tool-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

/* Component: Card */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: var(--space-lg);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.card-header {
  margin-bottom: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0;
}

/* Form Elements */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--space-sm);
  color: var(--text-muted);
  font-size: 0.875rem;
}

.input-with-action {
  display: flex;
  gap: var(--space-sm);
}

.form-input {
  flex: 1;
  background: #0d0f12;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 10px 14px;
  color: var(--text-main);
  font-family: var(--font-main);
  outline: none;
}

.form-input:focus {
  border-color: var(--accent-primary);
}

.btn {
  padding: 10px 20px;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
}

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

.btn-primary:hover {
  background: #2563eb;
  transform: translateY(-1px);
}

.btn-secondary {
  background: #2d333b;
  color: var(--text-main);
}

.btn-secondary:hover {
  background: #3e444d;
}

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

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
}

.btn-outline:hover {
  border-color: var(--text-muted);
  color: var(--text-main);
}

/* Terminal Window */
.terminal-card {
  background: var(--terminal-bg);
  border-radius: 8px;
  border: 1px solid #333;
  display: flex;
  flex-direction: column;
  height: 300px;
  margin-top: var(--space-xl);
}

.terminal-header {
  background: #1a1a1a;
  padding: 8px 16px;
  border-bottom: 1px solid #333;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #666;
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-red { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #27c93f; }

.terminal-body {
  padding: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  overflow-y: auto;
  color: #a9b7c6;
  line-height: 1.5;
}

.terminal-line {
  margin-bottom: 4px;
}

.log-time { color: #6a8759; }
.log-info { color: var(--accent-primary); }
.log-success { color: var(--accent-secondary); }
.log-error { color: #f75d59; }

/* Dashboard Widgets */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.stat-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  padding: var(--space-md);
  border-radius: 10px;
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 4px;
}

.progress-container {
  margin-top: var(--space-md);
}

.progress-bar-bg {
  height: 6px;
  background: #2d333b;
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent-primary);
}

/* Utility Classes */
.mt-xl { margin-top: var(--space-xl); }
.actions-row {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-color);
}

.placeholder-image {
  background: #2d333b;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  color: #4b5563;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-secondary);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 10px rgba(16, 185, 129, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}