/* Sidebar estilo profesional (azul oscuro, menú vertical, responsive) */
.sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: 230px;
    background: #1e2a6a;
    color: #fff;
    display: flex;
    flex-direction: column;
    z-index: 100;
    box-shadow: 2px 0 12px #1e2a6a22;
    transition: left 0.2s;
}
.sidebar .sidebar-logo {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 2.1rem 1.2rem 1.2rem 1.2rem;
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 0.02em;
}
.sidebar .sidebar-logo img {
    height: 2.2rem;
    width: auto;
    display: inline-block;
    vertical-align: middle;
}
.sidebar-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    padding: 0 0.5rem;
}
.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    padding: 0.85rem 1.2rem;
    color: #e0e7ff;
    font-size: 1.08rem;
    font-weight: 500;
    border-radius: 8px;
    text-decoration: none;
    transition: background 0.13s, color 0.13s;
}
.sidebar-link.active, .sidebar-link:hover {
    background: #23307a;
    color: #fff;
}
.sidebar-link .icon {
    font-size: 1.25rem;
    width: 1.7rem;
    text-align: center;
}
.sidebar-bottom {
    padding: 1.2rem;
    border-top: 1px solid #23307a;
}
@media (max-width: 900px) {
    .sidebar {
        left: -230px;
    }
    .sidebar.open {
        left: 0;
    }
}
body.with-sidebar {
    margin-left: 230px;
    transition: margin-left 0.2s;
}
@media (max-width: 900px) {
    body.with-sidebar {
        margin-left: 0;
    }
}