/* Variables de colores */
:root {
    --verde-fosforescente: #00ff00;
    --morado: #800080;
    --morado-oscuro: #4b004b;
    --morado-claro: #a64ca6;
    --fondo-oscuro: #0a0a0a;
    --fondo-card: #1a1a1a;
    --texto-claro: #ffffff;
    --texto-gris: #cccccc;
    --borde: #333333;
}

/* Reset y estilos base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--fondo-oscuro);
    color: var(--texto-claro);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Animaciones */
@keyframes glow {
    0% {
        box-shadow: 0 0 5px var(--verde-fosforescente);
    }
    50% {
        box-shadow: 0 0 20px var(--verde-fosforescente), 0 0 30px var(--morado);
    }
    100% {
        box-shadow: 0 0 5px var(--verde-fosforescente);
    }
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
    100% {
        transform: translateY(0px);
    }
}

@keyframes pulse {
    0% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
    100% {
        opacity: 1;
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Header */
header {
    background: linear-gradient(135deg, var(--morado-oscuro), var(--morado));
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    animation: glow 3s infinite;
    position: relative;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-icon {
    font-size: 2rem;
    color: var(--verde-fosforescente);
    animation: float 3s ease-in-out infinite;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
}

.logo span {
    color: var(--verde-fosforescente);
    text-shadow: 0 0 10px var(--verde-fosforescente);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 20px;
}

.nav-link {
    color: var(--texto-claro);
    text-decoration: none;
    padding: 10px 15px;
    border-radius: 5px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link:hover, .nav-link.active {
    background-color: rgba(0, 255, 0, 0.2);
    color: var(--verde-fosforescente);
    text-shadow: 0 0 5px var(--verde-fosforescente);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
    animation: slideIn 0.5s ease-out;
}

/* Dashboard */
.dashboard {
    background-color: var(--fondo-card);
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--borde);
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: linear-gradient(135deg, var(--morado-oscuro), var(--morado));
    border-radius: 10px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
    animation: pulse 2s infinite;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-icon {
    font-size: 2.5rem;
    color: var(--verde-fosforescente);
}

.stat-info h3 {
    font-size: 1rem;
    margin-bottom: 5px;
    color: var(--texto-gris);
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--texto-claro);
}

.section-title {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--verde-fosforescente);
    text-shadow: 0 0 5px var(--verde-fosforescente);
    border-bottom: 2px solid var(--morado);
    padding-bottom: 10px;
}

/* Table */
.table-container {
    overflow-x: auto;
}

.pagos-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.pagos-table th {
    background-color: var(--morado-oscuro);
    color: var(--texto-claro);
    padding: 1rem;
    text-align: left;
    border-bottom: 2px solid var(--morado);
}

.pagos-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--borde);
}

.pago-item {
    transition: all 0.3s ease;
}

.pago-item:hover {
    background-color: rgba(128, 0, 128, 0.1);
}

/* Estado selects */
.estado-select {
    padding: 5px 10px;
    border-radius: 5px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.estado-select.pendiente {
    background-color: #ff9800;
    color: #000;
}

.estado-select.por-vencer {
    background-color: #f44336;
    color: #fff;
}

.estado-select.pagado {
    background-color: #4caf50;
    color: #fff;
}

/* Botones de acción */
.acciones {
    display: flex;
    gap: 10px;
}

.btn-editar, .btn-eliminar {
    padding: 8px 12px;
    border-radius: 5px;
    text-decoration: none;
    color: white;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-editar {
    background-color: #2196f3;
}

.btn-eliminar {
    background-color: #f44336;
}

.btn-editar:hover, .btn-eliminar:hover {
    transform: scale(1.1);
    box-shadow: 0 0 10px rgba(0, 255, 0, 0.5);
}

/* Formularios */
.form-section {
    background-color: var(--fondo-card);
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--borde);
}

.pago-form {
    max-width: 100%;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--texto-gris);
}

.form-group input, 
.form-group select, 
.form-group textarea {
    padding: 12px;
    border-radius: 5px;
    border: 1px solid var(--borde);
    background-color: #2a2a2a;
    color: var(--texto-claro);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus, 
.form-group select:focus, 
.form-group textarea:focus {
    outline: none;
    border-color: var(--verde-fosforescente);
    box-shadow: 0 0 10px rgba(0, 255, 0, 0.3);
}

.checkbox-group {
    flex-direction: row;
    align-items: center;
    gap: 10px;
}

.checkbox-group input {
    width: auto;
}

.form-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.btn-primary, .btn-secondary {
    padding: 12px 24px;
    border-radius: 5px;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--morado), var(--morado-claro));
    color: white;
}

.btn-secondary {
    background-color: #444;
    color: white;
}

.btn-primary:hover, .btn-secondary:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--morado-claro), var(--morado));
    animation: pulse 1s infinite;
}

/* Footer */
footer {
    background: linear-gradient(135deg, var(--morado-oscuro), var(--morado));
    margin-top: 3rem;
    padding: 2rem 0 0;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-section h3, .footer-section h4 {
    margin-bottom: 1rem;
    color: var(--verde-fosforescente);
}

.footer-section p {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    color: var(--texto-claro);
    font-size: 1.5rem;
    transition: all 0.3s ease;
}

.social-links a:hover {
    color: var(--verde-fosforescente);
    transform: translateY(-5px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 2rem;
    padding: 1rem;
    text-align: center;
    color: var(--texto-gris);
}

/* Responsive */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        padding: 1rem;
    }
    
    .logo {
        margin-bottom: 1rem;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .stats {
        grid-template-columns: 1fr;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .form-buttons {
        flex-direction: column;
    }
    
    .pagos-table {
        font-size: 0.9rem;
    }
    
    .pagos-table th, 
    .pagos-table td {
        padding: 0.5rem;
    }
}

/* Efectos futuristas adicionales */
.futurista {
    position: relative;
    overflow: hidden;
}

.futurista::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(0, 255, 0, 0.1), transparent);
    transform: rotate(45deg);
    animation: shine 3s infinite;
}

@keyframes shine {
    0% {
        transform: rotate(45deg) translateX(-100%);
    }
    100% {
        transform: rotate(45deg) translateX(100%);
    }
}

/* Mensajes de alerta */
.mensaje {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 5px;
    text-align: center;
    font-weight: 600;
    animation: slideIn 0.5s ease-out;
}

.mensaje.exito {
    background-color: rgba(76, 175, 80, 0.2);
    border: 1px solid #4caf50;
    color: #4caf50;
}

.mensaje.error {
    background-color: rgba(244, 67, 54, 0.2);
    border: 1px solid #f44336;
    color: #f44336;
}