:root {
  color-scheme: light;
  --paper: #f8efe2;
  --paper-deep: #f1e2ca;
  --ink: #20344a;
  --muted: #566679;
  --line: rgba(32, 52, 74, 0.12);
  --card-shadow: 0 18px 40px rgba(132, 89, 40, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Avenir Next", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255, 194, 110, 0.55), transparent 28%),
    radial-gradient(circle at top right, rgba(120, 201, 255, 0.4), transparent 24%),
    linear-gradient(180deg, #fff8ef 0%, #f5eadc 100%);
}

.page-shell {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 72px;
}

.hero,
.picker-panel,
.history-panel {
  background: rgba(255, 249, 240, 0.9);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--card-shadow);
}

.hero {
  padding: 32px;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 12px;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #e26d5a;
}

h1,
h2,
strong {
  font-family: "Arial Rounded MT Bold", "Trebuchet MS", sans-serif;
}

h1 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4.6rem);
  line-height: 0.96;
  max-width: 10ch;
}

.intro,
.section-copy {
  color: var(--muted);
  max-width: 64ch;
  line-height: 1.6;
}

.picker-panel,
.history-panel {
  padding: 28px;
  margin-bottom: 24px;
}

.section-heading,
.history-header {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
  margin-bottom: 20px;
}

h2 {
  margin: 0 0 8px;
  font-size: 1.7rem;
}

.energy-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.energy-card {
  position: relative;
  border: 0;
  border-radius: 24px;
  padding: 18px 16px 16px;
  text-align: left;
  color: var(--ink);
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 12%, white), white);
  box-shadow: inset 0 0 0 1px rgba(32, 52, 74, 0.08);
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.energy-card:hover,
.energy-card:focus-visible {
  transform: translateY(-6px) rotate(-1deg);
  box-shadow:
    0 18px 28px rgba(32, 52, 74, 0.14),
    inset 0 0 0 2px color-mix(in srgb, var(--accent) 55%, white);
  outline: none;
}

.energy-meter {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  font-weight: 800;
  background: color-mix(in srgb, var(--accent) 22%, white);
}

.energy-art {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  margin: 0 0 14px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.55);
}

.energy-card strong,
.energy-card span {
  display: block;
}

.energy-card strong {
  margin-bottom: 4px;
  font-size: 1rem;
}

.energy-card span:last-child {
  color: var(--muted);
  font-size: 0.93rem;
}

.status-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.action-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.status-card,
.chart-card,
.range-filter select,
.utility-button {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--paper);
}

.status-card {
  padding: 16px 18px;
}

.status-label {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.range-filter {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-weight: 700;
}

.range-filter select {
  padding: 10px 14px;
  color: var(--ink);
  font: inherit;
}

.utility-button {
  padding: 12px 18px;
  color: var(--ink);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.utility-button:hover,
.utility-button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 10px 18px rgba(32, 52, 74, 0.1);
  outline: none;
}

.utility-button-accent {
  background: #ffdfb9;
  border-color: rgba(226, 109, 90, 0.3);
}

.chart-card {
  position: relative;
  min-height: 420px;
  padding: 16px;
}

#energyChart {
  width: 100%;
  height: 380px;
  display: block;
}

.chart-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 1.05rem;
}

.hidden {
  display: none;
}

.legend {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--muted);
  margin-top: 14px;
  font-size: 0.92rem;
}

@media (max-width: 920px) {
  .energy-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .section-heading,
  .history-header {
    align-items: start;
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .page-shell {
    width: min(100% - 20px, 1100px);
    padding-top: 20px;
  }

  .hero,
  .picker-panel,
  .history-panel {
    border-radius: 22px;
    padding: 20px;
  }

  .energy-grid,
  .status-row {
    grid-template-columns: 1fr;
  }

  #energyChart {
    height: 280px;
  }

  .chart-card {
    min-height: 320px;
    padding: 10px;
  }
}