body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
  margin: 0;
  padding: 20px;
  background-color: #f5f5f5;
  color: #333;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  background: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.header {
  text-align: center;
  margin-bottom: 30px;
}
.header h1 {
  color: #2c3e50;
  margin: 0;
  font-size: 2.5em;
}
.header p {
  color: #7f8c8d;
  margin: 10px 0 0;
}
.form-section {
  display: flex;
  gap: 15px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.form-group {
  flex: 1;
  min-width: 300px;
}
input, select, button {
  padding: 8px 12px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 14px;
  margin: 5px;
}
input, select {
  background: #fff;
  width: 150px;
}
button {
  background: #3498db;
  color: white;
  border: none;
  cursor: pointer;
  transition: background 0.3s;
}
button:hover {
  background: #2980b9;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  background: white;
}
th, td {
  border: 1px solid #ddd;
  padding: 12px;
  text-align: left;
}
th {
  background: #f8f9fa;
  font-weight: 600;
}
.metrics-card {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 15px;
  margin: 20px 0;
}
.gantt-chart {
  margin: 20px 0;
  padding: 15px;
  background: white;
  border-radius: 4px;
  border: 1px solid #ddd;
}
.gantt-block {
  display: inline-block;
  padding: 10px;
  margin-right: 2px;
  color: white;
  border-radius: 3px;
}
.time-graph {
  margin: 20px 0;
  padding: 15px;
  background: white;
  border-radius: 4px;
  border: 1px solid #ddd;
  display: block;
}

.time-graph ul {
  list-style-type: none;
  padding-left: 0;
  margin: 10px 0;
}

.time-graph li {
  margin: 5px 0;
  font-size: 14px;
}

.time-graph-legend {
  margin: 10px 0;
  padding: 10px;
  background: #f8f9fa;
  border-radius: 4px;
  font-size: 14px;
}

.time-graph-legend div {
  margin: 5px 0;
}
.tooltip {
  position: absolute;
  background: rgba(0,0,0,0.8);
  color: white;
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 12px;
  pointer-events: none;
  display: none;
  z-index: 1000;
}
.gantt-chart h3 {
  color: #2c3e50;
  margin-top: 0;
}