:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --green: #16a34a;
  --red: #dc2626;
}

* { box-sizing: border-box; }

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

.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.login-box {
  background: var(--card);
  padding: 32px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  width: 320px;
  text-align: center;
}

.login-box h1 { font-size: 20px; margin-bottom: 4px; }
.login-box input {
  width: 100%;
  padding: 10px;
  margin: 14px 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
}
.login-box button {
  width: 100%;
  padding: 10px;
  border: 0;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  cursor: pointer;
}
.login-box button:hover { background: var(--primary-dark); }
.error { color: var(--red); font-size: 14px; }
.muted { color: var(--muted); font-size: 14px; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}
.topbar h1 { font-size: 18px; margin: 0; }
.topbar-right { display: flex; align-items: center; gap: 16px; }
.patrimonio-header { font-weight: 600; font-size: 16px; }
.btn-link { color: var(--muted); text-decoration: none; font-size: 14px; }
.btn-link:hover { color: var(--text); }

.tabs {
  display: flex;
  gap: 4px;
  padding: 0 24px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.tab-btn {
  padding: 12px 16px;
  border: 0;
  background: transparent;
  cursor: pointer;
  font-size: 14px;
  color: var(--muted);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }

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

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

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}
.card .label { font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.card .value { font-size: 24px; font-weight: 700; }
.card .value.positive { color: var(--green); }
.card .value.negative { color: var(--red); }

.charts {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}
.chart-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}
.chart-box h3 { margin-top: 0; font-size: 15px; }
.chart-box canvas { max-height: 280px; }

@media (max-width: 800px) {
  .charts { grid-template-columns: 1fr; }
}

.table-box, .form-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  margin-bottom: 20px;
}
.table-box h3, .form-box h3 { margin-top: 0; font-size: 15px; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 13px; }
td.positive { color: var(--green); }
td.negative { color: var(--red); }

.form-box form, .form-box { display: flex; flex-direction: column; gap: 12px; max-width: 420px; }
.form-box label { display: flex; flex-direction: column; gap: 4px; font-size: 14px; color: var(--muted); }
.form-box input, .form-box select {
  padding: 9px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  color: var(--text);
}
.form-box button {
  align-self: flex-start;
  padding: 9px 18px;
  border: 0;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
  font-size: 14px;
}
.form-box button:hover { background: var(--primary-dark); }
.hint { font-size: 12px; color: var(--muted); margin: -4px 0 0; }
.msg { font-size: 14px; }
.msg.ok { color: var(--green); }
.msg.error { color: var(--red); }

.btn-small {
  padding: 4px 10px;
  font-size: 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  cursor: pointer;
  margin-right: 4px;
}
.btn-small:hover { background: #f3f4f6; }
.btn-small.danger { color: var(--red); border-color: #fca5a5; }
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  background: #eef2ff;
  color: var(--primary);
}
.tag.conto { background: #ecfdf5; color: var(--green); }