.dataset-history-card {
  margin-top: 22px;
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,0.12);
  background:
    radial-gradient(120% 120% at 0% 0%, rgba(126, 200, 255, 0.16), transparent 45%),
    radial-gradient(90% 90% at 100% 0%, rgba(118, 92, 255, 0.16), transparent 38%),
    rgba(7, 11, 30, 0.88);
  padding: 22px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.35);
}
.dataset-chart-topbar {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-start;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.dataset-chart-kicker {
  display: block;
  margin-bottom: 8px;
  color: #91a4d8;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
}
.dataset-chart-title {
  margin: 0;
  font-size: 1.55rem;
  color: #f8fafc;
  font-weight: 700;
}
.dataset-chart-summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.dataset-chart-state {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(126, 200, 255, 0.22);
  color: #cfe0ff;
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  line-height: 1;
}
.dataset-chart-price {
  font-size: 2.15rem;
  line-height: 1;
  font-weight: 800;
  color: #f8fafc;
  font-variant-numeric: tabular-nums;
}
.dataset-chart-change {
  font-size: 1rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.dataset-chart-change.is-up { color: #62d6a6; }
.dataset-chart-change.is-down { color: #ff8e9d; }
.dataset-chart-meta {
  color: #a5b4cf;
  font-size: 0.82rem;
}
.dataset-chart-controls {
  display: inline-flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
}
.dataset-chart-action,
.dataset-chart-select,
.dataset-range-tab {
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
  color: #d7e3ff;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.dataset-chart-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  cursor: pointer;
  flex: 0 0 auto;
}
.dataset-chart-action:hover,
.dataset-chart-select:hover,
.dataset-range-tab:hover {
  transform: translateY(-1px);
  border-color: rgba(126, 200, 255, 0.35);
  background: rgba(255,255,255,0.08);
}
.dataset-chart-action svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.dataset-chart-select {
  appearance: none;
  border-radius: 999px;
  padding: 9px 34px 9px 14px;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  background-image:
    linear-gradient(45deg, transparent 50%, #d7e3ff 50%),
    linear-gradient(135deg, #d7e3ff 50%, transparent 50%);
  background-position:
    calc(100% - 18px) calc(50% - 3px),
    calc(100% - 12px) calc(50% - 3px);
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}
.dataset-range-tab {
  border-radius: 999px;
  padding: 9px 14px;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
}
.dataset-range-tab.is-active {
  background: linear-gradient(135deg, rgba(62, 184, 255, 0.24), rgba(122, 92, 255, 0.26));
  border-color: rgba(126, 200, 255, 0.45);
  color: #ffffff;
}
.dataset-chart-shell {
  position: relative;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.08);
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.015));
  padding: 18px 18px 12px;
  overflow: hidden;
}
.dataset-chart-shell::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 100% 25%, 16.66% 100%;
  pointer-events: none;
  opacity: 0.75;
}
.dataset-chart-status {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #cbd5e0;
  font-size: 0.95rem;
  z-index: 2;
  background: rgba(7, 11, 30, 0.35);
  backdrop-filter: blur(2px);
}
.dataset-chart-status[hidden] { display: none; }
.dataset-chart-svg {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 340px;
  display: block;
  opacity: 1;
  transform: translateY(0);
  transition: opacity 180ms ease, transform 180ms ease;
}
.dataset-chart-axis {
  fill: #8da2d8;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}
.dataset-chart-grid {
  stroke: rgba(255,255,255,0.12);
  stroke-width: 1;
}
.dataset-chart-area {
  fill: url(#datasetChartAreaGradient);
}
.dataset-chart-line {
  fill: none;
  stroke: #7ec8ff;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: drop-shadow(0 8px 18px rgba(46, 150, 255, 0.24));
}
.dataset-chart-dot {
  fill: #9fe4ff;
  stroke: #08142f;
  stroke-width: 3;
}
.dataset-chart-crosshair {
  stroke: rgba(197, 219, 255, 0.75);
  stroke-width: 1.2;
  stroke-dasharray: 6 6;
  pointer-events: none;
}
.dataset-chart-hover-dot {
  fill: #ffffff;
  stroke: #3eb8ff;
  stroke-width: 3;
  filter: drop-shadow(0 0 10px rgba(62, 184, 255, 0.4));
  pointer-events: none;
}
.dataset-chart-hover-label-box {
  fill: rgba(8, 20, 47, 0.96);
  stroke: rgba(126, 200, 255, 0.4);
  stroke-width: 1;
  pointer-events: none;
}
.dataset-chart-hover-label-text {
  fill: #f8fafc;
  font-size: 12px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  pointer-events: none;
}
.dataset-chart-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 12px;
  color: #9bb0df;
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
}
@media (max-width: 768px) {
  .dataset-history-card {
    padding: 18px;
  }
  .dataset-chart-topbar {
    gap: 14px;
    margin-bottom: 14px;
  }
  .dataset-chart-title {
    font-size: 1.35rem;
  }
  .dataset-chart-price {
    font-size: 1.8rem;
  }
  .dataset-chart-controls {
    width: 100%;
    justify-content: flex-start;
  }
  .dataset-chart-shell {
    padding: 14px 14px 10px;
  }
  .dataset-chart-svg {
    height: 270px;
  }
}

@media (max-width: 560px) {
  .dataset-history-card {
    margin-top: 18px;
    padding: 14px;
    border-radius: 16px;
  }
  .dataset-chart-topbar > * {
    width: 100%;
  }
  .dataset-chart-kicker {
    margin-bottom: 6px;
    font-size: 11px;
  }
  .dataset-chart-title {
    font-size: 1.14rem;
  }
  .dataset-chart-summary {
    gap: 8px;
    margin-top: 6px;
  }
  .dataset-chart-price {
    font-size: 1.45rem;
  }
  .dataset-chart-change {
    font-size: 0.9rem;
  }
  .dataset-chart-state {
    padding: 5px 9px;
    font-size: 0.68rem;
  }
  .dataset-chart-meta {
    font-size: 0.72rem;
    line-height: 1.45;
  }
  .dataset-chart-controls {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
    align-items: stretch;
  }
  .dataset-chart-topbar .dataset-chart-controls {
    margin-top: 4px;
  }
  .dataset-chart-select {
    grid-column: span 2;
    width: 100%;
    min-width: 0;
    padding: 8px 30px 8px 12px;
    font-size: 0.78rem;
  }
  .dataset-chart-action {
    grid-column: span 2;
    width: 100%;
    height: 40px;
    border-radius: 14px;
  }
  .dataset-range-tab {
    width: 100%;
    padding: 8px 10px;
    font-size: 0.78rem;
    text-align: center;
  }
  .dataset-chart-shell {
    border-radius: 16px;
    padding: 12px 12px 8px;
  }
  .dataset-chart-shell::before {
    background-size: 100% 25%, 20% 100%;
  }
  .dataset-chart-axis {
    font-size: 10px;
  }
  .dataset-chart-svg {
    height: 220px;
  }
  .dataset-chart-footer {
    gap: 10px;
    font-size: 0.74rem;
  }
}