:root {
  --bg: #f7f7f7;
  --panel: #ffffff;
  --text: #121212;
  --muted: #5c5c5c;
  --border: #d9d9d9;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
}

body {
  min-height: 100vh;
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.94rem;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(300px, 360px) minmax(0, 1fr);
  gap: 20px;
  padding: 20px;
  max-width: 1500px;
  margin: 0 auto;
}

.controls-panel,
.chart-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.controls-panel {
  padding: 20px;
  align-self: start;
  position: sticky;
  top: 20px;
}

.panel-header h1 {
  margin: 0 0 8px;
  font-size: 1.8rem;
  line-height: 1.15;
}

.panel-header p,
.note-box p,
.note-box li {
  color: var(--muted);
  line-height: 1.45;
}

.controls-group {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.controls-group h2,
.chart-card h2 {
  margin: 0 0 14px;
  font-size: 1.05rem;
}

.slider-block,
.control-row {
  margin-bottom: 14px;
}

.slider-header,
.control-row {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
}

.slider-header label,
.control-row label {
  font-size: 0.96rem;
  font-weight: 600;
}

.slider-value {
  min-width: 52px;
  text-align: right;
  font-size: 0.95rem;
  color: var(--muted);
}

.slider-description {
  margin-top: 6px;
  font-size: 0.84rem;
  line-height: 1.35;
  color: var(--muted);
  font-style: italic;
}

input[type="range"] {
  width: 100%;
  margin-top: 8px;
}

input[type="number"] {
  width: 110px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.96rem;
}

.checkbox-row {
  justify-content: space-between;
}

.checkbox-row input {
  width: 18px;
  height: 18px;
}

.button-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

button {
  border: 1px solid var(--text);
  background: var(--panel);
  color: var(--text);
  border-radius: 999px;
  padding: 10px 14px;
  font-size: 0.94rem;
  cursor: pointer;
}

button:hover {
  background: #f0f0f0;
}

.plots-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  width: 100%;
  min-width: 0;
}

.chart-card {
  padding: 16px 18px 14px;
  width: 100%;
  max-width: 920px;
  margin: 0;
  overflow: hidden;
}

.chart-card h2 {
  text-align: center;
}

.chart-wrap {
  position: relative;
  width: 100%;
  height: 260px;
  min-height: 260px;
  max-height: 260px;
  overflow: hidden;
}

.chart-wrap canvas {
  display: block;
  max-width: 100%;
}

.note-box ul {
  margin: 10px 0 0 18px;
  padding: 0;
}

@media (max-width: 1000px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .controls-panel {
    position: static;
  }

  .chart-card {
    max-width: none;
  }
}