:root {
    --primary: #2ecc71;
    --primary-dark: #27ae60;
    --secondary: #3498db;
    --accent: #f1c40f;
    --bg-main: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.7);
    --bg-glass: rgba(255, 255, 255, 0.03);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-glass: rgba(255, 255, 255, 0.1);
    --radius-md: 12px;
    --radius-lg: 20px;
    --shadow-premium: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
}

* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

ul,
li {
    list-style: none !important;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-main);
    background-image:
        radial-gradient(at 0% 0%, rgba(46, 204, 113, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(52, 152, 219, 0.1) 0px, transparent 50%);
    color: var(--text-main);
    font-family: 'Outfit', sans-serif;
    margin: 0;
    min-height: 100vh;
}

.app-container {
    display: grid;
    grid-template-areas:
        "header header header"
        "sidebar main right"
        "footer footer footer";
    grid-template-columns: 260px minmax(0, 1fr) 260px;
    grid-template-rows: auto 1fr auto;
    min-height: 100vh;
    gap: 20px;
    padding: 20px;
    max-width: 1600px;
    margin: 0 auto;
    position: relative;
}

.glass-panel {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-premium);
}

.main-header {
    grid-area: header;
    padding: 10px 20px;
    position: relative;
    z-index: 1000 !important;
    /* Asegurar que esté por encima */
}

.sidebar {
    grid-area: sidebar;
    padding: 20px;
    z-index: 100;
}

.main-content {
    grid-area: main;
    padding: 0;
    position: relative;
    z-index: 1;
    /* Nivel bajo */
}

.main-content iframe {
    width: 100%;
    height: 100%;
    min-height: 650px;
    border-radius: var(--radius-md);
    border: none;
}

#rellenoderecho {
    grid-area: right;
    padding: 20px;
    z-index: 1;
}

.main-footer {
    grid-area: footer;
    padding: 30px 20px;
    border-top: 1px solid var(--border-glass);
    z-index: 1;
}

.mobile-toggle {
    display: none;
    background: var(--primary);
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    cursor: pointer;
}

/* --- ESTILOS ESPECÍFICOS DEL MENÚ LATERAL --- */
.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 0;
}

.nav-item {
    list-style: none;
}

.nav-item a {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    color: var(--text-main);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.95rem;
    border: 1px solid transparent;
}

.nav-item a:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-glass);
    transform: translateX(5px);
    color: var(--primary);
}

.nav-item a i {
    font-size: 1.1rem;
    width: 24px;
    transition: transform 0.3s;
}

.nav-item a:hover i {
    transform: scale(1.2);
    color: var(--primary);
}

.nav-item a span {
    font-weight: 500;
}

/* Estilo especial para el botón de Cerrar Sesión en el menú */
.nav-item button {
    width: 100%;
    background: none;
    border: 1px solid transparent;
    padding: 12px 16px;
    color: #ff4757;
    text-align: left;
    cursor: pointer;
    display: flex;
    align-items: center;
    border-radius: var(--radius-md);
    transition: all 0.3s;
    font-family: inherit;
}

.nav-item button:hover {
    background: rgba(255, 71, 87, 0.1);
    border-color: rgba(255, 71, 87, 0.2);
    padding-left: 20px;
}

/* --- RESPONSIVE --- */
/* --- BARRA DE NAVEGACIÓN MÓVIL ESTILO APP --- */
.mobile-nav-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: rgba(15, 23, 42, 0.95);
    border-top: 1px solid var(--border-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 2000;
    justify-content: space-around;
    align-items: center;
    padding-bottom: env(safe-area-inset-bottom);
    box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.5);
}

.mobile-nav-bar .nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.65rem;
    gap: 4px;
    transition: all 0.3s;
    flex: 1;
    cursor: pointer;
}

.mobile-nav-bar .nav-item i {
    font-size: 1.3rem;
}

.mobile-nav-bar .nav-item.active {
    color: var(--primary);
}

.mobile-nav-bar .nav-item.active i {
    transform: translateY(-2px);
    filter: drop-shadow(0 0 8px var(--primary));
}

@media (max-width: 1200px) {
    .app-container {
        grid-template-areas:
            "header header"
            "sidebar main"
            "footer footer";
        grid-template-columns: 240px 1fr;
    }

    #rellenoderecho {
        display: none;
    }
}

@media (max-width: 768px) {
    .app-container {
        grid-template-areas:
            "header"
            "main"
            "footer";
        grid-template-columns: 1fr;
        padding: 10px;
        padding-bottom: 90px;
        /* Espacio para la barra inferior */
    }

    .mobile-nav-bar {
        display: flex;
    }

    .main-header {
        position: sticky;
        top: 0;
        z-index: 2000 !important;
        border-radius: 0;
        margin: -10px -10px 10px -10px;
    }

    .mobile-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .sidebar {
        position: fixed;
        left: -300px;
        top: 0;
        bottom: 0;
        width: 280px;
        /* Un poco más ancho para comodidad */
        z-index: 3000;
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
        /* PERMITIR SCROLL */
        padding: 20px 15px 100px 15px;
        /* PADDING ABAJO PARA EL MENÚ */
        display: flex;
        flex-direction: column;
    }

    .sidebar.active {
        left: 0;
    }

    .sidebar-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.7);
        z-index: 2500;
        display: none;
        backdrop-filter: blur(5px);
    }

    .sidebar-overlay.active {
        display: block;
    }
}