:root {
  --bg-dark: #0b0f19;
  --bg-card: rgba(23, 31, 51, 0.7);
  --bg-card-hover: rgba(30, 41, 69, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent-color: #6366f1;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --font-main: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

body {
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(139, 92, 246, 0.12) 0px, transparent 50%);
  background-attachment: fixed;
  color: var(--text-primary);
  font-family: var(--font-main);
  min-height: 100vh;
  padding: 24px;
}

.app-container {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Header */
.top-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.35);
}

.brand h1 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--success-color);
  box-shadow: 0 0 10px var(--success-color);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
}

.btn-text {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.85rem;
}

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

/* KPI Section */
.kpi-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.kpi-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.kpi-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.18);
}

.highlight-card {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
  border: 1px solid rgba(99, 102, 241, 0.4);
}

.kpi-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 700;
}

.monthly-icon {
  background: rgba(16, 185, 129, 0.2);
  color: var(--success-color);
}

.kpi-content {
  display: flex;
  flex-direction: column;
}

.kpi-title {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.kpi-value {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 2px 0;
  font-family: var(--font-mono);
}

.kpi-subtext {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

/* Controls Section */
.controls-section {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  padding: 14px 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-color);
  padding: 8px 14px;
  border-radius: var(--radius-md);
  flex: 1;
  min-width: 260px;
}

.search-box input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 0.9rem;
  width: 100%;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.filter-select {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-family: var(--font-main);
  font-size: 0.88rem;
  outline: none;
  cursor: pointer;
}

/* Main Machine Grid */
.section-title-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.section-title-bar h2 {
  font-size: 1.25rem;
  font-weight: 600;
}

.badge {
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.badge-info {
  background: rgba(99, 102, 241, 0.2);
  color: #a5b4fc;
}

.badge-running {
  background: rgba(16, 185, 129, 0.2);
  color: var(--success-color);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-stopped {
  background: rgba(245, 158, 11, 0.2);
  color: var(--warning-color);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.machines-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 20px;
}

/* Machine Card */
.machine-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.machine-card:hover {
  transform: translateY(-3px);
  border-color: rgba(99, 102, 241, 0.4);
  background: var(--bg-card-hover);
}

.machine-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.machine-name-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.machine-name {
  font-size: 1.1rem;
  font-weight: 700;
  font-family: var(--font-mono);
}

.machine-app-tag {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.machine-specs-row {
  display: flex;
  gap: 12px;
  background: rgba(0, 0, 0, 0.2);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.spec-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.spec-item strong {
  color: var(--text-primary);
}

.machine-billing-box {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.03) 0%, rgba(255, 255, 255, 0.06) 100%);
  border: 1px solid var(--border-color);
  padding: 14px;
  border-radius: var(--radius-md);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.billing-metric-title {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 2px;
}

.billing-metric-value {
  font-size: 1.15rem;
  font-weight: 700;
  font-family: var(--font-mono);
}

.text-accent {
  color: #818cf8;
}

.text-success {
  color: var(--success-color);
}

.machine-meta-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
  padding-top: 10px;
}

/* Simulator Footer Widget */
.simulator-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-lg);
  padding: 18px 24px;
  margin-top: 10px;
}

.simulator-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.simulator-header h3 {
  font-size: 1.05rem;
  font-weight: 600;
}

.sim-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  align-items: center;
}

.sim-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
}

.sim-field select, .sim-field input[type="range"] {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: var(--radius-md);
}

.sim-result {
  display: flex;
  gap: 24px;
  background: rgba(99, 102, 241, 0.1);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  margin-top: 14px;
  align-items: center;
  justify-content: space-around;
}

.sim-metric {
  display: flex;
  flex-direction: column;
  font-size: 0.85rem;
}

.sim-metric strong {
  font-size: 1.2rem;
  font-family: var(--font-mono);
}

/* Loading & Empty States */
.loading-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  border-top-color: var(--accent-color);
  animation: spin 1s infinite linear;
}

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