/* --- Variables y Configuración --- */
:root {
    --primary: #2563eb;
    --primary-light: #eff6ff;
    --secondary: #7c3aed; 
    --bg-app: #f8fafc;
    --sidebar: #050505; /* Fondo negro puro solicitado */
    --text-main: #1e293b;
    --text-muted: #64748b;
    --glass: rgba(255, 255, 255, 0.8);
    --border: #e2e8f0;
    --nav-item: rgba(247, 151, 151, 0.15); /* Ajustado para ser más sutil en el hover */
    --footer: #7a7777; /* Sugiero blanco para el fondo del footer y texto gris */
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg-app);
    color: var(--text-main);
    display: flex;
    min-height: 100vh;
}

/* --- Sidebar Refinado (Elevación y Estilo) --- */
.sidebar {
    width: 260px;
    height: 100vh;
    background: var(--sidebar);
    color: #ffffff;
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 1000;
    box-shadow: 4px 0 25px rgba(0, 0, 0, 0.2); /* Elevación aumentada */
    border-right: none;
}

.logo {
    padding: 2.5rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.3rem;
    font-weight: 800;
    color: #ffffff; /* Texto blanco sobre fondo negro */
    letter-spacing: -0.5px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 1.5rem;
}

.logo i {
    color: var(--primary); /* El icono mantiene el azul */
}

.nav-links {
    list-style: none;
    padding: 0 1rem;
    margin: 0;
    flex-grow: 1;
}

.nav-item a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0.9rem 1.2rem;
    text-decoration: none;
    color: #94a3b8; /* Gris claro para legibilidad */
    border-radius: 12px;
    margin-bottom: 6px;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-item a:hover {
    background: var(--nav-item);
    color: #ffffff;
    transform: translateX(5px); /* Pequeño desplazamiento innovador */
}

.nav-item a.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 8px 16px rgba(37, 99, 235, 0.3);
}

/* Indicador Live */
.live-link { position: relative; }
.dot {
    width: 8px;
    height: 8px;
    background: #ef4444;
    border-radius: 50%;
    position: absolute;
    right: 15px;
    animation: pulse 2s infinite;
}

/* --- Perfil de Usuario (Adaptado al Sidebar Negro) --- */
.user-profile {
    margin: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05); /* Fondo sutil translúcido */
    border-radius: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.user-profile .info p {
    margin: 0;
    font-size: 0.85rem;
    font-weight: 600;
    color: #ffffff;
}

.user-profile .info small {
    color: #94a3b8;
    font-size: 0.75rem;
}

/* --- Layout y Footer --- */
.app-container {
    margin-left: 260px;
    width: calc(100% - 260px);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

#main-content {
    flex: 1;
    padding: 1.5rem 0;
}

.top-header {
    height: 70px;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--glass);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.main-footer {
    background: var(--footer);
    border-top: 1px solid rgba(255, 255, 255, 0.1); /* Borde sutil para fondo oscuro */
    padding: 0.8rem 2rem; 
    text-align: center;
    color: #ffffff; /* Letra blanca */
    font-size: 0.75rem; 
    margin-top: auto;
    width: 100%;
    letter-spacing: 0.02em; 
}

.main-footer p, 
.main-footer span {
    color: #ffffff; /* Refuerza el color blanco en todos los elementos hijos */
    margin: 0;
}

.main-footer span {
    font-weight: 600;
    opacity: 0.9;
}

/* --- Cards y Tablas --- */
.card {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    margin: 1rem 2rem;
    border: 1px solid rgba(226, 232, 240, 0.5);
    box-shadow: var(--shadow);
}

.custom-table th { 
    padding: 1.2rem 1rem; 
    text-align: left;
    color: var(--text-muted); 
    font-size: 0.75rem; 
    text-transform: uppercase; 
    border-bottom: 2px solid var(--bg-app); 
}

.custom-table td { 
    padding: 1.2rem 1rem; 
    border-bottom: 1px solid var(--bg-app); 
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(239, 68, 68, 0); }
    100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.fade-in { animation: fadeIn 0.6s ease-out; }
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}