/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  color: #333;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

/* Header styles */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
  background: rgba(255, 255, 255, 0.9);
  padding: 20px;
  border-radius: 15px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

h1 {
  color: #2c3e50;
  font-size: 2rem;
}

#startBtn {
  background: linear-gradient(45deg, #ff6b6b, #ee5a24);
  color: white;
  border: none;
  padding: 12px 24px;
  font-size: 1rem;
  border-radius: 25px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(238, 90, 36, 0.4);
}

#startBtn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(238, 90, 36, 0.6);
}

#startBtn:disabled {
  background: #ccc;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Main content layout */
main {
  display: grid;
  gap: 30px;
}

/* Status section */
.status {
  background: rgba(255, 255, 255, 0.95);
  padding: 30px;
  border-radius: 15px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.status h2 {
  color: #2c3e50;
  margin-bottom: 20px;
  font-size: 1.5rem;
}

#statusDisplay {
  line-height: 2;
  font-size: 1.1rem;
}

/* Metrics section */
.metrics {
  background: rgba(255, 255, 255, 0.95);
  padding: 30px;
  border-radius: 15px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.metrics h2 {
  color: #2c3e50;
  margin-bottom: 20px;
  font-size: 1.5rem;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.metric-card {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  padding: 20px;
  border-radius: 10px;
  text-align: center;
  transition: transform 0.3s ease;
}

.metric-card:hover {
  transform: translateY(-5px);
}

.metric-card h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
  opacity: 0.9;
}

.metric-card div {
  font-size: 2rem;
  font-weight: bold;
}

/* Responsive design */
@media (max-width: 768px) {
  .container {
    padding: 10px;
  }
  
  header {
    flex-direction: column;
    gap: 15px;
    text-align: center;
  }
  
  #startBtn {
    width: 100%;
  }
  
  main {
    grid-template-columns: 1fr;
  }
}