:root {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-2: #0f172a;
  --border: #334155;
  --border-soft: #1f2937;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --muted-2: #64748b;
  --muted-3: #475569;
  --accent: #22c55e;
  --error: #ef4444;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif; line-height: 1.45; }
a { color: inherit; text-decoration: none; }

.container { max-width: 720px; margin: 0 auto; padding: 32px 20px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* ── Login ──────────────────────────────────────────────────────── */
.login-card { max-width: 360px; margin: 80px auto; padding: 28px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px; }
.login-card h1 { margin: 0 0 4px; font-size: 22px; }
.subtitle { color: var(--muted); margin: 0 0 20px; font-size: 14px; }
.login-card input[type=password] { width: 100%; padding: 12px 14px; font-size: 15px;
  background: var(--bg); color: var(--text); border: 1px solid var(--border);
  border-radius: 10px; margin-bottom: 12px; }
.login-card button { width: 100%; padding: 12px; font-size: 15px; font-weight: 600;
  background: var(--accent); color: var(--bg); border: 0; border-radius: 10px;
  cursor: pointer; }
.error { background: rgba(239,68,68,.12); color: var(--error); padding: 10px 12px;
  border-radius: 10px; margin-bottom: 12px; font-size: 14px; }

/* ── Sidebar ───────────────────────────────────────────────────── */
.sidebar-toggle { display: none; position: fixed; top: 14px; left: 14px; z-index: 30;
  background: var(--surface); color: var(--text); border: 1px solid var(--border);
  border-radius: 10px; width: 40px; height: 40px; font-size: 18px; cursor: pointer; }

.sidebar { position: fixed; top: 0; left: 0; bottom: 0; width: 240px;
  background: var(--surface); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; padding: 18px 0; z-index: 20; }
.brand { display: flex; align-items: center; gap: 12px; padding: 0 20px 18px; }
.brand-mark { width: 40px; height: 40px; border-radius: 12px; background: #3b82f6;
  color: white; display: grid; place-items: center; font-weight: 700; font-size: 18px; }
.brand-name { font-weight: 700; font-size: 16px; }
.brand-sub { font-size: 12px; color: var(--muted-2); }

.nav { flex: 1; overflow-y: auto; padding: 0 10px; }
.nav-group-label { font-size: 10px; font-weight: 700; letter-spacing: 1px;
  color: var(--border); padding: 12px 12px 4px; }
.nav-item { display: flex; align-items: center; gap: 10px; padding: 9px 12px;
  border-radius: 10px; color: var(--muted); font-size: 14px; font-weight: 500;
  border: 1px solid transparent; margin-bottom: 1px; }
.nav-item .ic { width: 16px; height: 16px; flex: 0 0 16px; }
.nav-item:hover { background: rgba(148, 163, 184, 0.06); color: var(--text); }
.nav-item.is-active { background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent); border-color: color-mix(in srgb, var(--accent) 35%, transparent); }
.nav-item.is-placeholder { opacity: 0.55; }
.nav-item .badge { margin-left: auto; color: var(--muted-3); font-size: 10px; }

.logout { padding: 14px 10px 0; border-top: 1px solid var(--border); }
.logout button { width: 100%; display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; background: transparent; color: var(--muted); border: 0;
  border-radius: 10px; cursor: pointer; font-size: 13px; }
.logout button:hover { background: rgba(239, 68, 68, 0.08); color: var(--error); }
.logout .ic { width: 14px; height: 14px; }

/* ── Main / page ────────────────────────────────────────────────── */
.main { margin-left: 240px; padding: 28px 32px 80px; min-height: 100vh; }
.page-header { display: flex; align-items: center; gap: 14px; margin-bottom: 28px;
  flex-wrap: wrap; }
.page-header h1 { font-size: 26px; margin: 0; font-weight: 700; }
.page-header .lead { color: var(--muted); font-size: 14px; margin: 2px 0 0; }
.page-header-ic { width: 44px; height: 44px; border-radius: 12px;
  display: grid; place-items: center; flex: 0 0 44px; }
.page-header-ic i { width: 22px; height: 22px; }
.range-pills { margin-left: auto; display: flex; gap: 6px; }
.pill { padding: 6px 14px; border-radius: 999px; background: var(--surface);
  border: 1px solid var(--border); color: var(--muted); font-size: 12px;
  cursor: pointer; font-weight: 500; }
.pill.is-active { background: #3b82f6; color: white; border-color: #3b82f6; }

/* ── Home: grid de módulos ───────────────────────────────────────── */
.module-group { margin-bottom: 32px; }
.group-title { font-size: 11px; font-weight: 700; letter-spacing: 1.5px;
  color: var(--border); margin: 0 0 12px; }
.module-grid { display: grid; gap: 12px;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.module-card { display: flex; flex-direction: column; gap: 12px; padding: 16px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
  transition: transform .14s ease, border-color .14s ease;
  --accent: #3b82f6;
}
.module-card:hover { transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border)); }
.module-card.is-placeholder { opacity: 0.7; }
.module-ic { width: 42px; height: 42px; border-radius: 12px;
  display: grid; place-items: center;
  background: color-mix(in srgb, var(--accent) 16%, transparent); color: var(--accent); }
.module-ic i { width: 20px; height: 20px; }
.module-label { font-weight: 600; font-size: 14px; }
.module-desc { font-size: 12px; color: var(--muted-2); margin-top: 2px; }

/* ── Placeholder page ───────────────────────────────────────────── */
.placeholder-card { background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 48px 24px; text-align: center; max-width: 540px;
  margin: 0 auto; }
.placeholder-card .ph-icon { width: 64px; height: 64px; border-radius: 18px;
  background: rgba(148, 163, 184, 0.08); display: grid; place-items: center;
  margin: 0 auto 18px; }
.placeholder-card .ph-icon i { width: 32px; height: 32px; }
.placeholder-card h2 { margin: 0 0 10px; font-size: 18px; }
.placeholder-card p { color: var(--muted); font-size: 14px; max-width: 420px;
  margin: 0 auto 18px; }
.btn-secondary { display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px; background: var(--surface-2); border: 1px solid var(--border);
  color: var(--text); border-radius: 10px; font-size: 13px; cursor: pointer; }
.btn-secondary i { width: 14px; height: 14px; }

/* ── Stat cards ─────────────────────────────────────────────────── */
.stat-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  margin-bottom: 22px; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  padding: 14px 16px; }
.stat-label { font-size: 12px; color: var(--muted-2); }
.stat-value { font-size: 22px; font-weight: 700; margin-top: 4px; }
.stat-sub { font-size: 11px; color: var(--muted-3); margin-top: 2px; }

/* ── Chart cards ────────────────────────────────────────────────── */
.chart-grid { display: grid; gap: 12px; grid-template-columns: 2fr 1fr 1fr;
  margin-bottom: 22px; }
@media (max-width: 1100px) { .chart-grid { grid-template-columns: 1fr 1fr; }
  .chart-grid > :first-child { grid-column: 1 / -1; } }
@media (max-width: 720px) { .chart-grid { grid-template-columns: 1fr; } }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  padding: 16px 18px; margin-bottom: 16px; }
.card-title { font-size: 14px; font-weight: 600; }
.card-sub { font-size: 12px; color: var(--muted-2); margin-bottom: 12px; }
.chart-wrap { position: relative; height: 240px; }
.chart-wrap.small { height: 220px; }

/* ── Formulario añadir gasto ───────────────────────────────────── */
.form-grid { display: grid; gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); align-items: end; }
.form-grid label { display: flex; flex-direction: column; gap: 4px; font-size: 12px;
  color: var(--muted-2); }
.form-grid input, .form-grid select { padding: 8px 10px; font-size: 14px;
  background: var(--surface-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; }
.btn-primary { padding: 9px 16px; background: var(--accent); color: var(--bg);
  border: 0; border-radius: 8px; font-weight: 600; font-size: 14px; cursor: pointer;
  white-space: nowrap; }
.form-msg { font-size: 12px; margin-top: 8px; color: var(--muted-2); min-height: 16px; }
.form-msg.ok { color: var(--accent); }
.form-msg.err { color: var(--error); }

/* ── Tabla ──────────────────────────────────────────────────────── */
.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table th { text-align: left; padding: 8px 10px; color: var(--muted-2);
  font-weight: 600; font-size: 11px; letter-spacing: 0.5px; text-transform: uppercase;
  border-bottom: 1px solid var(--border); }
.table td { padding: 10px; border-bottom: 1px solid var(--border-soft); color: var(--text); }
.table tr:last-child td { border-bottom: 0; }
.table .num { text-align: right; font-variant-numeric: tabular-nums; }
.table .empty { text-align: center; color: var(--muted-3); padding: 18px; }
.cat-pill { display: inline-block; padding: 2px 8px; border-radius: 999px;
  font-size: 11px; font-weight: 600; }
.btn-del { background: none; border: 0; color: var(--muted-3); cursor: pointer;
  padding: 4px 6px; border-radius: 4px; }
.btn-del:hover { background: rgba(239,68,68,0.1); color: var(--error); }

/* ── Responsive: sidebar off-canvas ─────────────────────────────── */
@media (max-width: 900px) {
  .sidebar-toggle { display: grid; place-items: center; }
  .sidebar { transform: translateX(-100%); transition: transform 0.18s ease;
    box-shadow: 0 12px 40px rgba(0,0,0,0.4); }
  body.sidebar-open .sidebar { transform: translateX(0); }
  .main { margin-left: 0; padding: 70px 16px 60px; }
}