.jensen-card {
  --jensen-surface: #ffffff;
  --jensen-soft: #f4f7f5;
  --jensen-ink: #243029;
  --jensen-muted: #617068;
  --jensen-line: #cdd8d1;
  --jensen-curve: #2b8a3e;
  --jensen-secant: #d97706;
  --jensen-tangent: #7048e8;
  --jensen-point-avg: #e03131;
  --jensen-point-fn: #1971c2;
  --jensen-accent: #2b8a3e;
  box-sizing: border-box;
  width: 100%;
  padding: 1rem;
  color: var(--jensen-ink);
  background: var(--jensen-surface);
  border: 1px solid var(--jensen-line);
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(31, 48, 39, 0.08);
  margin-bottom: 1.5rem;
}

[theme="dark"] .jensen-card {
  --jensen-surface: #202523;
  --jensen-soft: #29302c;
  --jensen-ink: #edf3ef;
  --jensen-muted: #aab8b0;
  --jensen-line: #3d4942;
  --jensen-curve: #69db7c;
  --jensen-secant: #ffa94d;
  --jensen-tangent: #b197fc;
  --jensen-point-avg: #ff8787;
  --jensen-point-fn: #74c0fc;
  --jensen-accent: #40c057;
  box-shadow: none;
}

.jensen-card * {
  box-sizing: border-box;
}

.jensen-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.8rem;
}

.jensen-head h3 {
  margin: 0.1rem 0 0;
  color: var(--jensen-ink);
  font-size: 1.05rem;
  line-height: 1.35;
}

.jensen-eyebrow {
  margin: 0;
  color: var(--jensen-muted);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.11em;
}

.jensen-button {
  flex: 0 0 auto;
  padding: 0.55rem 0.8rem;
  color: #fff;
  background: #2b8a3e;
  border: 0;
  border-radius: 8px;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s ease;
}

.jensen-button:hover {
  background: #237234;
}

.jensen-button:focus-visible,
.jensen-card input:focus-visible,
.jensen-card select:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--jensen-accent) 55%, transparent);
  outline-offset: 2px;
}

.jensen-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

@media (max-width: 600px) {
  .jensen-controls {
    grid-template-columns: 1fr;
  }
}

.jensen-control {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.82rem;
  font-weight: 600;
}

.jensen-control span {
  display: flex;
  justify-content: space-between;
  color: var(--jensen-ink);
}

.jensen-control output {
  color: var(--jensen-accent);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

.jensen-control input[type="range"] {
  width: 100%;
  accent-color: var(--jensen-accent);
}

.jensen-control select {
  width: 100%;
  padding: 0.45rem 0.6rem;
  background: var(--jensen-soft);
  color: var(--jensen-ink);
  border: 1px solid var(--jensen-line);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.82rem;
}

.jensen-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.jensen-metrics > div {
  padding: 0.55rem 0.65rem;
  background: var(--jensen-soft);
  border: 1px solid var(--jensen-line);
  border-radius: 10px;
}

.jensen-metrics span {
  display: block;
  color: var(--jensen-muted);
  font-size: 0.7rem;
  line-height: 1.25;
}

.jensen-metrics strong {
  display: block;
  margin-top: 0.2rem;
  color: var(--jensen-ink);
  font-size: 0.95rem;
  font-variant-numeric: tabular-nums;
}

.jensen-canvas-wrap {
  position: relative;
  width: 100%;
  height: 260px;
  background: var(--jensen-soft);
  border: 1px solid var(--jensen-line);
  border-radius: 12px;
  overflow: hidden;
}

.jensen-canvas-wrap canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.jensen-legend {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem;
  margin-top: 0.65rem;
  font-size: 0.74rem;
  color: var(--jensen-muted);
}

.jensen-legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.jensen-legend i {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.jensen-legend i.line-curve {
  background: var(--jensen-curve);
  border-radius: 2px;
  height: 3px;
  width: 14px;
}

.jensen-legend i.line-secant {
  background: var(--jensen-secant);
  border-radius: 2px;
  height: 3px;
  width: 14px;
}

.jensen-legend i.line-tangent {
  background: var(--jensen-tangent);
  border-radius: 2px;
  height: 3px;
  width: 14px;
}

.jensen-legend i.point-avg {
  background: var(--jensen-point-avg);
}

.jensen-legend i.point-fn {
  background: var(--jensen-point-fn);
}

.jensen-hint,
.jensen-caption {
  margin: 0.65rem 0 0;
  color: var(--jensen-muted);
  font-size: 0.78rem;
  line-height: 1.45;
  text-align: center;
}