/* ====
   ESTILOS - APP DE GASTOS
   Similar a tu app de taxi (amarillo profesional)
==== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 20px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.header {
  background: white;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  margin-bottom: 20px;
  text-align: center;
}

.header h1 {
  color: #333;
  font-size: 2rem;
  margin-bottom: 10px;
}

.header p {
  color: #666;
  font-size: 1rem;
}

.nav {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 15px;
}

.nav a {
  background: #667eea;
  color: white;
  padding: 10px 20px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
}

.nav a:hover {
  background: #764ba2;
  transform: translateY(-2px);
}

.nav a.active {
  background: #FFD700;
  color: black;
}

.card {
  background: white;
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 15px;
}

.form-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: bold;
  color: #333;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 10px;
  border: 2px solid #ddd;
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: #667eea;
}

.btn {
  background: #667eea;
  color: white;
  padding: 12px 30px;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn:hover {
  background: #764ba2;
  transform: translateY(-2px);
}

.btn-success {
  background: #28a745;
}

.btn-success:hover {
  background: #218838;
}

.btn-danger {
  background: #dc3545;
}

.btn-danger:hover {
  background: #c82333;
}

.btn-warning {
  background: #ffc107;
  color: black;
}

.btn-warning:hover {
  background: #e0a800;
}

.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 15px;
}

table th,
table td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid #ddd;
}

table th {
  background: #667eea;
  color: white;
  font-weight: bold;
}

table tr:hover {
  background: #f5f5f5;
}

.actions {
  display: flex;
  gap: 5px;
}

.actions button {
  padding: 5px 10px;
  font-size: 0.9rem;
}

.resumen-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.resumen-item {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 20px;
  border-radius: 12px;
  text-align: center;
}

.resumen-item h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.resumen-item .monto {
  font-size: 2rem;
  font-weight: bold;
  margin: 10px 0;
}

.resumen-item .cantidad {
  font-size: 0.9rem;
  opacity: 0.9;
}

.alert {
  padding: 15px;
  border-radius: 8px;
  margin-bottom: 15px;
}

.alert-success {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.alert-error {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.loader {
  text-align: center;
  padding: 20px;
}

.spinner {
  border: 4px solid #f3f3f3;
  border-top: 4px solid #667eea;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  margin: 0 auto;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.empty-state {
  text-align: center;
  padding: 40px;
  color: #666;
}

.empty-state i {
  font-size: 4rem;
  margin-bottom: 20px;
  opacity: 0.3;
}

/* Responsive */
@media (max-width: 768px) {
  .header h1 {
    font-size: 1.5rem;
  }
  
  .nav {
    flex-direction: column;
  }
  
  .nav a {
    width: 100%;
    text-align: center;
  }
  
  table {
    font-size: 0.9rem;
  }
  
  .actions {
    flex-direction: column;
  }
}