:root {
  --primary: #1b6e5c;
  --primary-dark: #124a3e;
  --accent: #e8a33d;
  --danger: #c0392b;
  --bg: #f5f7f6;
}

body {
  background: var(--bg);
  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  padding-bottom: 70px; /* espacio para barra inferior en móvil */
}

.app-navbar {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

.card {
  border: none;
  border-radius: 14px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
}

.stat-card {
  border-radius: 16px;
  color: #fff;
  padding: 1.1rem 1.3rem;
}
.stat-card h6 { opacity: .85; margin-bottom: .3rem; font-weight: 500;}
.stat-card .valor { font-size: 1.6rem; font-weight: 700; }

.stat-ingresos { background: linear-gradient(135deg,#1b6e5c,#2e9d80); }
.stat-gastos   { background: linear-gradient(135deg,#c0392b,#e05a48); }
.stat-balance  { background: linear-gradient(135deg,#2c3e50,#4a6178); }
.stat-ahorro   { background: linear-gradient(135deg,#e8a33d,#f4c06a); color:#3a2a05; }

.btn-primary {
  background-color: var(--primary);
  border-color: var(--primary);
}
.btn-primary:hover { background-color: var(--primary-dark); border-color: var(--primary-dark); }

.badge-pendiente { background-color: #e8a33d; color:#3a2a05; }
.badge-pagada { background-color: #1b6e5c; }

.bottom-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: #fff;
  border-top: 1px solid #e2e2e2;
  display: flex;
  justify-content: space-around;
  padding: 6px 0;
  z-index: 1030;
}
.bottom-nav a {
  color: #666;
  text-decoration: none;
  text-align: center;
  font-size: .68rem;
  flex: 1;
}
.bottom-nav a i { display:block; font-size: 1.2rem; }

.auth-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  padding: 1rem;
}
.auth-card {
  max-width: 420px;
  width: 100%;
  border-radius: 18px;
  padding: 2rem;
}

@media (max-width: 576px) {
  .stat-card .valor { font-size: 1.3rem; }
}