:root {
    --primary: #007bff;
    --bg-color: #f4f7f6;
    --text-color: #333;
    --card-bg: #fff;
    --border: #ddd;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }

body { background-color: var(--bg-color); color: var(--text-color); }

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

.card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

/* Login */
#login-view { height: 100vh; display: none; justify-content: center; align-items: center; }
#login-view.active { display: flex; }
.login-card { width: 100%; max-width: 400px; text-align: center; }
.login-card form { display: flex; flex-direction: column; gap: 15px; margin-top: 20px; }

input, button { padding: 10px; border: 1px solid var(--border); border-radius: 4px; font-size: 1rem; }
button { background-color: var(--primary); color: white; border: none; cursor: pointer; font-weight: bold; }
button:hover { opacity: 0.9; }
.btn-secondary { background-color: #6c757d; }

.error { color: red; font-size: 0.9rem; }

/* Dashboard */
header { display: flex; justify-content: space-between; align-items: center; padding: 20px; background: var(--primary); color: white; }
.header-right { display: flex; align-items: center; gap: 20px; }
main { padding: 20px; max-width: 1200px; margin: 0 auto; }

.flex-form { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 15px; }
.flex-form input { flex: 1; min-width: 150px; }

.table-container { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; margin-top: 10px; }
th, td { padding: 12px; text-align: left; border-bottom: 1px solid var(--border); }
th { background-color: #f8f9fa; }
.amount-positive { color: green; font-weight: bold; }
.amount-negative { color: red; font-weight: bold; }

/* Responsive */
@media (max-width: 768px) {
    header { flex-direction: column; gap: 10px; text-align: center; }
    .flex-form { flex-direction: column; }
    .flex-form button { width: 100%; }
}

/* NUEVOS ESTILOS PARA BOTONES DE ACCIÓN */
.btn-small { padding: 6px 10px; font-size: 0.85rem; margin-right: 5px; margin-bottom: 5px;}
.btn-danger { background-color: #dc3545; }
.btn-warning { background-color: #ffc107; color: #000; }
.btn-warning:hover { color: #000; }