:root {
  color-scheme: light;
  --bg: #fafafa;
  --fg: #1a1a1a;
  --muted: #666;
  --border: #e5e5e5;
  --card-bg: #fff;
  --accent: #2563eb;
  --positive: #047857;
  --negative: #b91c1c;
}

* { box-sizing: border-box; }

html, body { background: var(--bg); color: var(--fg); }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
  line-height: 1.5;
  padding: 16px;
  max-width: 720px;
  margin-inline: auto;
}

header { margin-bottom: 24px; }
header h1 { margin: 0; font-size: 20px; font-weight: 600; }
.periodo { color: var(--muted); margin: 4px 0 0; font-size: 14px; }

.loading, .error {
  padding: 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.error { color: var(--negative); }

.resumen {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 24px;
}
.resumen .card {
  padding: 12px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.resumen .card.sobrante { grid-column: 1 / -1; }
.resumen .card h3 {
  margin: 0 0 4px;
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.amount { font-variant-numeric: tabular-nums; font-weight: 600; }
.resumen .amount { font-size: 18px; margin: 0; }
.amount.small { font-size: 13px; font-weight: 400; }

.bloque { margin-bottom: 24px; }
.bloque > h2 {
  font-size: 14px;
  text-transform: uppercase;
  color: var(--muted);
  letter-spacing: 0.5px;
  margin: 0 0 12px;
}

.ingreso, .categoria, .evento {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 8px;
}
.ingreso h4 { margin: 0 0 4px; font-size: 14px; }
.meta { margin: 0 0 4px; font-size: 12px; color: var(--muted); }

.cat-header, .sub-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
}
.cat-header h3 { margin: 0; font-size: 15px; }

.subcategoria {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}
.sub-header h4 {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
  font-weight: 500;
}

.item {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  font-size: 13px;
  gap: 8px;
}
.item-name { color: var(--fg); }

.evento .fecha { margin: 0; font-size: 12px; color: var(--muted); }
.evento .desc { margin: 4px 0; font-size: 14px; }

@media (min-width: 480px) {
  body { padding: 24px; }
  .resumen { grid-template-columns: 1fr 1fr 1fr; }
  .resumen .card.sobrante { grid-column: auto; }
}