:root {
  --bg: #14161a;
  --panel: #1d2026;
  --border: #2c313a;
  --text: #e8e9ec;
  --muted: #9aa1ac;
  --accent: #5fb0ff;
  --green: #5fd394;
  --red: #ff6b6b;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

header {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
  max-width: 100vw;
  overflow-x: auto;
}

header h1 { font-size: 18px; margin: 0; flex-shrink: 0; }
.logout-link { margin-left: auto; color: var(--muted); font-size: 13px; text-decoration: none; flex-shrink: 0; }
.logout-link:hover { color: var(--text); }

nav { display: flex; gap: 8px; }

.tab-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
}
.tab-btn.active { color: var(--text); border-color: var(--accent); }

main { padding: 24px; max-width: 1100px; margin: 0 auto; }

.tab { display: none; }
.tab.active { display: block; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}
.card .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.card .value { font-size: 24px; font-weight: 600; margin-top: 6px; }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
@media (max-width: 720px) { .grid-2 { grid-template-columns: 1fr; } }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 16px;
}
.panel h2 { margin-top: 0; font-size: 15px; color: var(--muted); }

.pie-wrap { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.pie { width: 160px; height: 160px; border-radius: 50%; flex-shrink: 0; }
.legend { list-style: none; padding: 0; margin: 0; font-size: 13px; }
.legend li { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.legend .swatch { width: 10px; height: 10px; border-radius: 2px; display: inline-block; }

.btn-group { display: flex; gap: 6px; margin-bottom: 12px; }
.btn-group button {
  background: transparent; border: 1px solid var(--border); color: var(--muted);
  padding: 4px 10px; border-radius: 6px; cursor: pointer; font-size: 13px;
}
.btn-group button.active { color: var(--text); border-color: var(--accent); }

.month-nav { display: flex; align-items: center; gap: 12px; }
.month-nav button {
  background: transparent; border: 1px solid var(--border); color: var(--text);
  width: 30px; height: 30px; border-radius: 6px; cursor: pointer; font-size: 14px;
}
.month-nav button:hover { border-color: var(--accent); }
.month-nav span { font-size: 14px; font-weight: 600; min-width: 140px; text-align: center; }

.big-number { font-size: 28px; font-weight: 600; margin: 8px 0; }

.mini-list { list-style: none; padding: 0; margin: 0; font-size: 13px; max-height: 220px; overflow-y: auto; }
.mini-list li { display: flex; justify-content: space-between; padding: 4px 0; border-bottom: 1px solid var(--border); }

.simple-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.simple-table th, .simple-table td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--border); }
.simple-table th { color: var(--muted); font-weight: 500; }
.table-total-row td { font-weight: 700; border-top: 2px solid var(--accent); background: rgba(95, 176, 255, 0.08); }

.filters { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; align-items: flex-end; }
.filters select, .filters input { background: var(--panel); border: 1px solid var(--border); color: var(--text); padding: 6px; border-radius: 6px; }
.filters button { background: var(--accent); border: none; color: #0a0a0a; padding: 6px 14px; border-radius: 6px; cursor: pointer; }
.filter-field { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }

/* Gráfico de barras divergente (ingreso a la derecha, gasto a la izquierda de un eje central) */
.divbar-chart { display: flex; flex-direction: column; gap: 10px; }
.divbar-row { display: grid; grid-template-columns: 110px 1fr 90px; align-items: center; gap: 10px; font-size: 13px; }
.divbar-label { color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.divbar-track { position: relative; height: 20px; background: var(--border); border-radius: 4px; overflow: hidden; }
.divbar-axis { position: absolute; top: 0; bottom: 0; left: 50%; width: 1px; background: var(--muted); opacity: .5; }
.divbar-fill { position: absolute; top: 2px; bottom: 2px; border-radius: 3px; }
.divbar-fill.gasto { background: var(--red); right: 50%; }
.divbar-fill.ingreso { background: var(--green); left: 50%; }
.divbar-values { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted); white-space: nowrap; }
.divbar-empty { color: var(--muted); font-size: 13px; padding: 12px 0; }

/* Gráfico de líneas (evolución en el tiempo) */
.line-chart-svg { display: block; width: 100%; height: auto; margin-top: 12px; }
.lc-axis { stroke: var(--border); stroke-width: 1; }
.lc-area { fill: var(--accent); opacity: .12; }
.lc-line { fill: none; stroke: var(--accent); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.lc-dot { fill: var(--accent); }
.lc-dot:hover { fill: var(--text); }
.lc-xlabel { fill: var(--muted); font-size: 9px; }
.lc-ylabel { fill: var(--muted); font-size: 10px; }
.lc-gridline { stroke: var(--border); stroke-width: 1; stroke-dasharray: 3 3; }

.chart-wrap { position: relative; }
.chart-tooltip {
  position: absolute; pointer-events: none; display: none;
  background: #0a0b0d; border: 1px solid var(--accent); border-radius: 8px;
  padding: 8px 12px; font-size: 12px; white-space: nowrap; z-index: 20;
  box-shadow: 0 4px 12px rgba(0,0,0,.4);
}
.chart-tooltip .tt-month { font-weight: 700; color: var(--text); margin-bottom: 4px; }
.chart-tooltip .tt-row { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); }
.chart-tooltip .tt-row span:last-child { color: var(--text); font-weight: 600; }

form.panel { max-width: 560px; }
form label { display: block; margin-bottom: 12px; font-size: 13px; color: var(--muted); }
form input, form select {
  display: block; width: 100%; margin-top: 4px;
  background: #12141a; border: 1px solid var(--border); color: var(--text);
  padding: 8px; border-radius: 6px; font-size: 14px;
}
.checkbox-row { display: flex; align-items: center; gap: 8px; }
.checkbox-row input { display: inline; width: auto; margin-top: 0; }

fieldset { border: 1px solid var(--border); border-radius: 8px; margin-bottom: 12px; }
legend { color: var(--muted); font-size: 12px; padding: 0 6px; }

.tag-row { display: flex; gap: 8px; align-items: center; margin-bottom: 8px; }
.tag-row select { flex: 2; }
.tag-row input { flex: 1; }
.tag-row button { flex: 0; background: transparent; border: 1px solid var(--border); color: var(--red); border-radius: 6px; cursor: pointer; }

.form-actions { display: flex; gap: 8px; margin-top: 12px; }
button[type="submit"] { background: var(--accent); border: none; color: #0a0a0a; padding: 8px 16px; border-radius: 6px; cursor: pointer; font-weight: 600; }
button.danger { background: transparent; border: 1px solid var(--red); color: var(--red); padding: 8px 16px; border-radius: 6px; cursor: pointer; }
#tx-reset { background: transparent; border: 1px solid var(--border); color: var(--muted); padding: 8px 16px; border-radius: 6px; cursor: pointer; }

.error { color: var(--red); font-size: 13px; min-height: 16px; }

.row-actions button { background: transparent; border: 1px solid var(--border); color: var(--muted); border-radius: 4px; cursor: pointer; font-size: 12px; margin-right: 4px; }

.positive { color: var(--green); }
.negative { color: var(--red); }