:root {
  --primary-color: #2563eb;
  --secondary-color: #64748b;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  --bg-color: #ffffff;
  --text-color: #1f2937;
  --card-bg: #f8fafc;
  --border-color: #e2e8f0;
}

.dark-mode {
  --bg-color: #1e293b;
  --text-color: #f1f5f9;
  --card-bg: #334155;
  --border-color: #475569;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: all 0.3s ease;
}

.dashboard {
  padding: 20px;
  max-width: 1400px;
  margin: 0 auto;
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.controls {
  display: flex;
  gap: 10px;
  align-items: center;
}

select, button {
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--card-bg);
  color: var(--text-color);
  cursor: pointer;
}

.server-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.server-card {
  background: var(--card-bg);
  border-radius: 8px;
  padding: 20px;
  border-left: 4px solid var(--secondary-color);
  transition: transform 0.2s ease;
}

.server-card.running {
  border-left-color: var(--success-color);
}

.server-card.offline {
  border-left-color: var(--error-color);
}

.server-card.warning {
  border-left-color: var(--warning-color);
}

.server-card:hover {
  transform: translateY(-2px);
}

.server-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
}

.status-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--secondary-color);
}

.status-indicator.running {
  background: var(--success-color);
  animation: pulse 2s infinite;
}

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

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

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

.server-info p {
  margin: 5px 0;
  font-size: 0.9em;
  color: var(--secondary-color);
}

.server-metrics {
  margin-top: 15px;
}

.metric {
  display: flex;
  align-items: center;
  margin: 8px 0;
  font-size: 0.9em;
}

.metric label {
  width: 60px;
  font-weight: 500;
}

.progress-bar {
  flex: 1;
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
  margin: 0 10px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--primary-color);
  transition: width 0.3s ease;
}

.metrics-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.chart-container {
  background: var(--card-bg);
  border-radius: 8px;
  padding: 20px;
  height: 300px;
}

.alerts-section {
  background: var(--card-bg);
  border-radius: 8px;
  padding: 20px;
}

.alerts-list {
  margin-top: 15px;
}

/* Login Overlay */
.login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.login-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
}

.login-card h2 {
    margin-bottom: 20px;
    text-align: center;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
}

.form-group input {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-color);
    color: var(--text-color);
}

.login-btn {
    width: 100%;
    padding: 10px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    font-weight: bold;
}

.settings-panel {
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100%;
    background: var(--card-bg);
    box-shadow: -2px 0 10px rgba(0,0,0,0.1);
    transition: right 0.3s ease;
    z-index: 900;
    padding: 20px;
    overflow-y: auto;
}

.settings-panel.open {
    right: 0;
}