:root {
  --bg: #f7f7f2;
  --panel: #ffffff;
  --ink: #17222b;
  --muted: #586a73;
  --accent: #2d7d46;
  --accent-strong: #1f5a34;
  --border: #dfe5e3;
  --shadow: rgba(18, 28, 32, 0.08);
}

* {
  box-sizing: border-box;
}

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

.page {
  max-width: 980px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

.header {
  margin-bottom: 22px;
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  color: var(--muted);
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3rem);
}

.summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 26px;
}

.summary-card,
.store-card,
.chart-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 8px 22px var(--shadow);
}

.summary-card {
  padding: 18px 20px;
}

.label {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 8px;
}

.stores {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.store-card {
  padding: 18px 18px 14px;
}

.store-card h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
}

.price-row {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
}

.price {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  font-weight: 700;
}

.status {
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.status.available {
  background: rgba(45, 125, 70, 0.12);
  color: var(--accent-strong);
}

.status.unavailable {
  background: rgba(145, 145, 145, 0.12);
  color: var(--muted);
}

.store-card .meta {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.82rem;
}

.chart-panel {
  padding: 20px;
}

.chart-panel h2 {
  margin-top: 0;
}

#history-chart {
  width: 100%;
  height: 220px;
  display: block;
  border-radius: 10px;
  background: linear-gradient(180deg, #f8faf7 0%, #edf5f1 100%);
}

@media (max-width: 600px) {
  .page {
    padding-left: 14px;
    padding-right: 14px;
  }
}