:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #687386;
  --line: #e8ebf0;
  --surface: #ffffff;
  --canvas: #f7f8fa;
  --accent: #3f6df6;
  --accent-soft: #eaf0ff;
  --positive: #177d55;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--canvas);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button { font: inherit; }

.page-shell { width: min(1120px, calc(100% - 40px)); margin: 0 auto; padding: 56px 0 72px; }
.page-header, .panel-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; }
.page-header { margin-bottom: 10px; }
h1, h2, p { margin: 0; }
h1 { font-size: clamp(2rem, 4vw, 2.75rem); letter-spacing: -0.045em; line-height: 1.1; }
h2 { font-size: 1.125rem; letter-spacing: -0.02em; }
.eyebrow { color: var(--accent); font-size: 0.75rem; font-weight: 750; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 8px; }
.subtitle { color: var(--muted); margin-top: 12px; font-size: 1rem; }
.status { min-height: 22px; color: var(--muted); font-size: 0.875rem; margin: 18px 0 22px; }
.status.error { color: #b42318; }
.refresh-button { border: 1px solid var(--line); border-radius: 10px; background: var(--surface); color: var(--ink); cursor: pointer; font-weight: 650; padding: 10px 14px; transition: border-color .15s, box-shadow .15s; white-space: nowrap; }
.refresh-button:hover { border-color: #aeb8c9; box-shadow: 0 2px 8px #17203312; }
.refresh-button:focus-visible, .offer-row:focus-visible { outline: 3px solid #9db5ff; outline-offset: 2px; }

.overview { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-bottom: 16px; }
.metric-card, .panel { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; }
.metric-card { padding: 20px; }
.metric-card p, .metric-card span, .muted { color: var(--muted); font-size: .8125rem; }
.metric-card strong { display: block; font-size: 1.75rem; letter-spacing: -.04em; margin: 7px 0 6px; }
.panel { padding: 24px; }
.chart-panel { margin-bottom: 16px; }
.panel-heading { margin-bottom: 20px; }
.chart-wrap { min-height: 236px; position: relative; }
.chart-wrap svg { display: block; height: 236px; overflow: visible; width: 100%; }
.chart-grid { stroke: #eef0f4; stroke-width: 1; }
.chart-area { fill: url(#chart-gradient); }
.chart-line { fill: none; stroke: var(--accent); stroke-linecap: round; stroke-linejoin: round; stroke-width: 3; }
.chart-dot { fill: var(--surface); stroke: var(--accent); stroke-width: 2.5; }
.chart-label { fill: var(--muted); font-size: 11px; }
.empty-state { align-items: center; color: var(--muted); display: flex; font-size: .9rem; justify-content: center; min-height: 236px; text-align: center; }

.offers-head, .offer-row { display: grid; grid-template-columns: minmax(260px, 2.3fr) minmax(100px, .75fr) minmax(130px, 1fr) minmax(145px, 1fr); gap: 20px; }
.offers-head { border-bottom: 1px solid var(--line); color: var(--muted); font-size: .75rem; font-weight: 700; letter-spacing: .04em; padding: 0 12px 10px; text-transform: uppercase; }
.offer-row { align-items: center; border-bottom: 1px solid var(--line); color: inherit; min-height: 69px; padding: 12px; text-decoration: none; transition: background .15s; }
.offer-row:last-child { border-bottom: 0; }
.offer-row:hover { background: #f7f9ff; }
.offer-title { font-size: .9rem; font-weight: 650; line-height: 1.35; }
.price { color: var(--positive); font-size: .95rem; font-weight: 750; white-space: nowrap; }
.seller { font-size: .9rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rating { color: var(--muted); font-size: .875rem; white-space: nowrap; }
.rating strong { color: var(--ink); font-weight: 650; }
.empty-offers { color: var(--muted); padding: 32px 12px 10px; text-align: center; }

@media (max-width: 700px) {
  .page-shell { width: min(100% - 28px, 620px); padding: 32px 0 48px; }
  .page-header { gap: 16px; }
  .refresh-button { padding: 9px 11px; }
  .overview { grid-template-columns: 1fr; }
  .panel { padding: 18px; border-radius: 14px; }
  .panel-heading { flex-direction: column; gap: 8px; }
  .offers-head { display: none; }
  .offer-row { grid-template-columns: 1fr auto; gap: 8px 16px; min-height: 0; padding: 15px 4px; }
  .offer-title { grid-column: 1 / -1; }
  .seller::before { color: var(--muted); content: "Продавец: "; font-size: .75rem; }
  .rating { text-align: right; }
  .chart-wrap svg { height: 220px; }
}