/* Variables de colores */
:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --light-color: #ecf0f1;
    --dark-color: #34495e;
    --text-color: #2c3e50;
    --border-color: #bdc3c7;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #f5f7fa;
}

.container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
header {
    background-color: var(--secondary-color);
    color: white;
    padding: 1rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

header h1 {
    margin-bottom: 0;
    font-size: 1.8rem;
}

.user-info {
    color: var(--light-color);
    font-size: 0.9rem;
    margin: 0.5rem 0;
    text-align: right;
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 0.5rem;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s;
    display: block;
}

nav a:hover, nav a.active {
    background-color: var(--primary-color);
}

/* Main content */
main {
    flex: 1;
    padding: 1rem;
}

.module {
    display: none;
}

.module.active {
    display: block;
}

/* Cards y estadísticas */
.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
}

.stat-card h3 {
    color: var(--dark-color);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    text-transform: uppercase;
}

.stat-card p {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

/* Botones */
.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

.btn-primary:hover {
    background-color: #2980b9;
}

.btn-secondary {
    background-color: var(--light-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

.btn-secondary:hover {
    background-color: #d5dbdb;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.3s;
}

.btn-danger:hover {
    background-color: #c0392b;
}

.btn-warning {
    background-color: var(--warning-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.3s;
}

.btn-warning:hover {
    background-color: #e67e22;
}

/* Formularios */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

/* Tablas */
.table-container {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    overflow: hidden;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--secondary-color);
    color: white;
    font-weight: 500;
    position: sticky;
    top: 0;
}

tr:hover {
    background-color: #f8f9fa;
}

/* Acciones en tablas */
.acciones {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.acciones button {
    padding: 0.25rem 0.5rem;
    font-size: 0.8rem;
}

/* Modales */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 2rem;
    border-radius: 8px;
    width: 90%;
    max-width: 600px;
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideIn 0.3s;
}

@keyframes slideIn {
    from { transform: translateY(-50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
    transition: color 0.3s;
}

.close:hover {
    color: var(--danger-color);
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 1.5rem;
}

/* Login */
.login-body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 1rem;
}

.login-card {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    text-align: center;
    animation: slideIn 0.5s;
}

.login-card h1 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.login-card p {
    color: var(--text-color);
    margin-bottom: 2rem;
}

/* Filtros */
.filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    align-items: center;
    background: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.filters input, .filters select {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    min-width: 150px;
}

.module-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

/* Transacciones */
.ingreso {
    color: var(--success-color);
    font-weight: bold;
}

.egreso {
    color: var(--danger-color);
    font-weight: bold;
}

/* Mensajes */
#login-message {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 4px;
    text-align: center;
}

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

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

.warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

/* Estados de carga */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: " Cargando...";
    font-style: italic;
}

/* Responsive */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .user-info {
        text-align: left;
        margin: 0.5rem 0;
    }
    
    nav ul {
        flex-direction: column;
        gap: 0.5rem;
        width: 100%;
    }
    
    nav a {
        text-align: center;
    }
    
    .stats-container {
        grid-template-columns: 1fr;
    }
    
    .filters {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filters input, .filters select {
        min-width: auto;
    }
    
    .module-actions {
        flex-direction: column;
    }
    
    .table-container {
        overflow-x: auto;
    }
    
    table {
        min-width: 600px;
    }
    
    .modal-content {
        margin: 10% auto;
        width: 95%;
        padding: 1rem;
    }
    
    .acciones {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .stat-card {
        padding: 1rem;
    }
    
    .stat-card p {
        font-size: 1.2rem;
    }
    
    th, td {
        padding: 0.5rem;
    }
    
    .btn-primary, .btn-secondary {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
}

/* Scroll personalizado */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #2980b9;
}

/* Utilidades */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.text-success {
    color: var(--success-color);
}

.text-danger {
    color: var(--danger-color);
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* Estados vacíos */
.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--dark-color);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}