* {
  box-sizing: border-box
}

.page {
  max-width: 1100px;
  margin: 18px auto;
  padding: 0 12px
}

.title {
  margin: 6px 0 12px
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
  margin-bottom: 12px
}

.field {
  display: flex;
  flex-direction: column;
  min-width: 220px
}

.field.narrow {
  min-width: 140px
}

.field label {
  font-weight: 600;
  margin-bottom: 6px
}

select,
input {
  padding: 8px;
  border: 1px solid #d1d5db;
  border-radius: 8px
}

.btn {
  padding: 10px 16px;
  border: none;
  border-radius: 10px;
  background: #2563eb;
  color: #fff;
  cursor: pointer
}

#chart {
  height: 460px
}

/* tooltip styling (from your demo) */
.tooltip-header {
  margin-bottom: 5px;
  font-size: 16px;
  font-weight: 500;
  padding-bottom: 5px;
  border-bottom: 1px solid #c5c5c5
}

.tooltip-body {
  width: 170px
}

.tooltip-body .series-name {
  opacity: .7;
  display: inline-block;
  line-height: 1.5;
  padding-right: 10px;
  width: 126px
}

.tooltip-body .value-text {
  display: inline-block;
  line-height: 1.5;
  width: 30px
}

#chart {
  height: 520px
}